20 December 2015

pseudo-random frequency hopping


Frequency Hopping Spread Spectrum (FHSS) is a method of transmitting radio signals by rapidly switching the carrier among many frequency channels using a pseudo-random sequence known to both transmitter and receiver(s). The heard packets in this sample have a duration of 2520 ms, frequency shift ~ 20 Hz and 20 data bits carried (other similar transmission have been noted with 2460 ms and 24 data bits, same shift) and span up a 2 MHz bandwidth, this recording has been on 13 MHz band.



16 December 2015

Logs

03831.0 ZLST: Zoll Leitstelle Cuxhaven, D 2158 USB MIL 188-141 2G-ALE calling ZKNI (10Dec15) (AAI)
05155.0 TBB: Turkish Navy, TUR 2115 USB STANAG-4285 600/L CARBs "TBB041--ZES-2/TBB043I(0)/TBB045I(0)/TBB048AI(0)/DZ 036I(0)/TBB050I(0)//" (08Dec15) (AAI)
05200.0 ---: Unid (prob. Algerian Mil) 2105 USB Arabian op.chat + STANAG-4197 (09Dec15) (AAI)
05246.2 ---: Unid (prob. SXV Greek Navy Piraeus, GRC) 2155 STANAG-4285 1200/L crypto (08Dec15) (AAI)
07455.0 RS0016D: prob. Macedonian Mil, MKD 1302 MIL 188-141 2G-ALE handshake with CS004A then into MIL 188-110 serial (10Dec15) (AAI)
07535.0 WG02: Algerian Mil, ALG 0726 USB MIL 188-141 2G-ALE calling PY01 (11Dec15) (AAI)
07622.0 CS002: prob. Macedonian Mil, MKD 1302 MIL 188-141 2G-ALE handshake with RS0011 then into MIL 188-110 serial (10Dec15) (AAI)
08010.0 ---: Ukraine Mil, UK 0647 double FSK 96/100Bd ~500Hz (16Dec15) (AAI)
10156.5 OEY20: Austrian Mil Lebanon, 1230 USB MIL 188-141 2G-ALE calling OEY61, handshake then into MIL 188-110 App.B 39-tone (16Dec15) (AAI)
10251.0 ---: Russian Intel, RUS 0825 (cf) MFSK-68(34+34) + QPSK 2400Bd 10KHz inserts each 1 sec (09Dec15) (AAI)
10370.0 SPI324: Polish Mil, Pol 1507 USB MIL 188-141 2G-ALE calling LCR154 (09Dec15) (AAI)
10435.0 CENTR3: ALG MFA Bucuresti, ROU 0802 USB MIL 188-141 2G-ALE calling FQS (11Dec15) (AAI)
10506.0 ZEN: Algerian AF, ALG 0737 USB MIL 188-141 2G-ALE calling CM2 (09Dec15) (AAI)
11120.0 BSK: Algerian AF, ALG 0847 USB MIL 188-141 2G-ALE calling CM4 (08Dec15) (AAI)
12226.0 ---: Unid 0906 MIL 188-110 serial 2400bps/voice MELP vocoder (11Dec15) (AAI)
12664.5 BE01: Algerian Mil, ALG 0916 USB MIL 188-141 2G-ALE calling LQ01 (12Dec15) (AAI)
12664.5 XV01: Algerian Mil, ALG 0921 USB MIL 188-141 2G-ALE calling BE01 (12Dec15) (AAI)
13499.0 13151: Moroccan Civil Protection, MRC 0802 MIL 188-141 2G-ALE sounding (10Dec15) (AAI)
13856.0 ---: Russian Intel, RUS 0840 USB (cf) CIS FTM-4, MFSK-4 150Bd 4000Hz (tones at: -6, -2, +2, +6 KHz) (14Dec15) (AAI)
13892.0 ---: Russian Intel, RUS 0845 (cf) MFSK-68(34+34) + QPSK 2400Bd 10KHz inserts each 1 sec (15Dec15) (AAI)
15043.0 GUA: USAF Anderson GUM 0741 USB MIL 188-141 2G-ALE sounding (14Dec15) (AAI)
15623.0 ---: Russian Intel, RUS 0845 USB (cf) CIS FTM-4, MFSK-4 150Bd 4000Hz (tones at: -6, -2, +2, +6 KHz) (10Dec15) (AAI)
15626.0 ---: Russian Intel, RUS 0840 USB (cf) CIS FTM-4, MFSK-4 150Bd 4000Hz (tones at: -6, -2, +2, +6 KHz) (15Dec15) (AAI)
15867.0 ---: Russian Diplo, RUS 0934 (cf) SERDOLIK selcall flwd by MFSK-34 40Bd 40Hz (15Dec15) (AAI)
16116.5 OEY61: Austrian Mil Lebanon 0913 USB MIL 188-141 2G-ALE calling OEY20 (10Dec15) (AAI)
16252.5 OEY61: Austrian Mil Lebanon 0912 USB MIL 188-141 2G-ALE calling OEY20 (10Dec15) (AAI)
16283.6 KVX53: Unid US DoS station 0859 USB MIL 188-141 2G-ALE calling KVX50 (10Dec15) (AAI)
16606.0 XKM: DHFCS Forest Moor, G 0909 USB MIL 188-141 2G-ALE calling XSS (08Dec15) (AAI)
17472.0 ---: Russian Diplo, RUS 0826 (cf) SERDOLIK MFSK-34 40Bd 40Hz (14Dec15) (AAI)
19041.5 ---: Unid 1254 USB Hagelin HC-256 voice scrambler (14Dec15) (AAI)


Austrian Mil: 188-141 2G-ALE link setup + 188-110 App.B 39-tone
Hagelin HC-256 HF voice scrambler

12 December 2015

playing with MS-DMT (MIL-STD Data Modem Terminal)

The MS-DMT application is a software defined modem based communications terminal tool developed as a Microsoft Foundation Class (MFC) based Multi-threaded 32 bit application. It is currently designed to run under MSWindows XP SP3 and later versions of both 32 and 64 bit MS-Windows operating systems. The tool is written in C++ using the Microsoft Visual Studio 2008 compiler and requires the installation of the VS2008 C++ runtime redistribution libraries which are part of the full MS-DMT install distribution only.
The MS-DMT tool functions as both a MIL-STD modem and basic data communications terminal and provides MARS a MIL-STD-188-110A (MS110A) compliant Serial Tone (ST) waveform modem based Message Terminal capability providing message composition and automated message storage to simplify MARS MS110A Forward Error Correction (FEC) message handling.
The software’s terminal provides numerous features to aid in message handling and the software also supports the use of more fully featured external asynchronous terminal applications. Additional features such as Data Link Protocol, Data Compression, Data Encryption and others may be added to the MS-DMT tool as required and in accordance with the specific standards as requested or left to implementation in external terminal applications.
You may use MS-DMT to build, decode and learn the MIL-STD 188-110 ST wavefvorm, the modem, along with other interesting resources and docs, can be downloaded from here:
MIL-STD Data Modem Terminal (MS-DMT) software and resources 





8 December 2015

Logs

19305.0 ---: Russian Mil, RUS 1300 USB CIS-45 HDR modem v1 33.3Bd 62.5Hz BPSK (01Dec15) (AAI)
18424.0 ---: Unid 0921 USB MKSK-11 125Bd 250Hz, first tone at: +650Hz ACF 790ms (07Dec15) (AAI)
18255.0 ---: Unid 0915 (cf) BPSK 1200Bd 9-secs segments + 9 tones 150Hz spaced (07Dec15) (AAI)
18100.0 ---: Russian Intel, RUS 1310 USB (cf: +1500Hz) 5 x MFSK-16 10Bd 20Hz + BPSK 250Bd inserts each 10 secs (03Dec15) (AAI)
16898.5 XSG: Shanghai Radio, CHN 0825 CW/ARQ morse id "XSG" (02Dec15) (AAI) 
16083.0 ---: Russian Intel, RUS 0900 USB (cf) CIS FTM-4, MFSK-4 150Bd 4000Hz (tones at: -6, -2, +2, +6 KHz) (07Dec15) (AAI)
15842.0 ---: Unid 0805 USB MIL 188-110 serial PSK-8 2400bps/short (01Dec15) (AAI)
13940.0 ---: Russian Mil, RUS 0745 USB CIS-112 22.22Bd 25.6Hz DBPSK (03Dec15) (AAI)
12693.0 ---: Russian Navy, RUS 1441 USB (cf: +1000Hz) CIS "Akula" BPSK 500Bd + FSK 500Bd/1000 (03Dec15) (AAI)
12282.5 ---: Unid (prob. German AF) 1430 USB Telefunken Racoms MAHRS-2400 serial 2400Bd PSK-8 (05Dec15) (AAI)
12226.0 ---: Unid 0903 USB MIL 188-110 serial 2400bps/voice (07Dec15) (AAI)
12197.0 ---: Unid NATO 1236 ISB LINK-11/SLEW 2400Bd (05Dec15) (AAI)
12173.0 ---: Russian Intel, RUS 0845 USB (cf) CIS FTM-4, MFSK-4 150Bd 4000Hz (tones at: -6, -2, +2, +6 KHz) (07Dec15) (AAI)
10165.0 ---: Unid 0757 USB MIL 188-110 serial 2400bps/voice (07Dec15) (AAI)
12164.0 ---: Unid 1151 USB MFSK-11 125Bd 250Hz, first tone at: +650Hz ACF 790ms (04Dec15) (AAI)
12156.0 ---: Russian Intel, RUS 1420 USB (cf) CIS FTM-4, MFSK-4 150Bd 4000Hz (tones at: -6, -2, +2, +6 KHz) (03Dec15) (AAI)
12153.0 ---: Russian Intel, RUS (cf) MFSK-68 (34+34) + QPSK 2400Bd 10KHz inserts each 1 sec (07Dec15) (AAI)
12120.0 ---: Russian Mil, RUS 0803 USB CIS-3000 serial 3000Bd PSK-8 flwd by CIS-128 OFDM 21Bd QAM-16 (07Dec15) (AAI) 
12113.0 ---: Chinese Mil 1530 LSB OFDM 30-tone bursts BPSK 60Bd (06Dec15) (AAI)
09903.0 ---: Unid (prob. French Mil) 0811 USB Thales Systeme-3000 ALE, QPSK 2000Bd + MSFK-8 125Bd (03Dec15) (AAI)
08812.0 TAH: Istanbul radio, TUR 1006 USB J3E English weather conditions, 0ff 1012 (03Dec15) (AAI)
06970.0 ---: Ukraine Mil, UKR 0650 (cf) MFSK-4 96Bd 500Hz tones at: -750, -250, +250 +750 Hz (03Dec15) (AAI)

[ALE]
16490.0 HIB: Unid net 1321 USB MIL 188-141 2G-ALE calling TOA (01Dec15) (AAI)
16490.0 TOA: Unid net 1320 USB MIL 188-141 2G-ALE sounding (01Dec15) (AAI)
15091.0 CROSPR: USAF Croughton, G 1313 USB MIL 188-141 2G-ALE calling DL0005DAT flwd by 188-110 serial (02Dec15) (AAI)
15091.0 ADW: USAF Andrews, USA 1306 USB MIL 188-141 2G-ALE calling DL0005DAT (USAF AWACS #81-0005) flwd by 188-110 serial (02Dec15) (AAI)
12431.0 AVALLONE: Guardia Di Finanza patrol boat, I 1451 USB MIL 188-141 2G-ALE calling MESSINA (03Dec15) (AAI)
12203.0 CENTR2: MFA Bucuresti, ROU 0840 MIL 188-141 2G-ALE calling YPM25 (07Dec15) (AAI)
12120.0 ---: (no call) prob. Algerian AF, ALG 0828 USB MIL 188-141 2G-ALE calling AOS (prob. Ain Oussera Airport ?)(07Dec15) (AAI)
11226.0 ICZ: USAF Sigonella, I 1510 USB MIL 188-141 2G-ALE multiple stations call "HOW COPY" (06Dec15) (AAI)
08190.0 RHI: Saudi Air Force, ARS  1515 USB MIL 188-141 2G-ALE calling AAI (07Dec15) (AAI)
08162.0 SP01 Algerian Mil, ALG 1523 USB MIL 188-141 2G-ALE calling PY01 (07Dec15) (AAI)
08016.0 NPRD15: NPRD net, HRV 1321 USB MIL 188-141 2G-ALE sounding (05Dec15) (AAI)
08016.0 NPRD001: NPRD net, HRV 0725 USB MIL 188-141 2G-ALE sounding (04Dec15) (AAI)
07421.5 CHFEDR: Greek Air Force, GRC 0733 USB MIL 188-141 2G-ALE calling SFFF2 (04Dec15) (AAI)

3 December 2015

MFSK-4 (double FSK) 96/100Bd 500Hz, Ukraine Military


This waveform is known as Double FSK 96/100 Baud and 500 Hz shift, a dual channel mode used by Ukraine Military, spreading about a 1730Hz bandwidth. The signal was heard just this morning (03 December) on 6970.9 KHz on USB, tones at -750, -250, +250 and + 750 Hz. Site radioscanner.ru reports this signal as Ukraine Mil 96-100, the two baudrates indication (96 and 100) is due to (literally) "some difficulties  in determining the speed of manipulation, due to the fact that the transmission channels are not synchronized (or poorly synchronized) with each other".
That issue is verified in the 21Aug15 log: the signal exhibits two baudrate lines at 96 and 100 Hz (pic. 3). That uncertainty is anyway not present in the measurement results of the  03Dec15 signal (96Bd) as in the pic. 2. The perfect 500Hz space among the tones (pic. 3) has ben found in the 96Bd signal, while in the other (96/100Bd) the shift is about 505Hz.

Pic. 1 - 03Dec15 signal, single baudrate line (96Hz)
Pic. 2 - 21Aug15 signal, the two baudrate lines
Pic. 3 03Dec15 signal, perfect 500Hz shift


http://youtu.be/w44gtaCBQBM?hd=1
 

2 December 2015

MFSK-4 150Bd 4000Hz (CIS FTM-4): the effective data-rate

This signal (reported here) is logged as FSK 4-tone with baudrate 150Bd and shift 4000Hz, or else CIS FTM-4 (Pic. 1). Looking in depth, they use only 4 of 24 combinations of the four tones (Pic. 2), so the encoded characters which are transmitted are reduced to 4.  This mode is called Frequency-Time Matrix (FTM) or, in this case, FTM-4. The coding method is five-digit group of characters plus spaces. The four symbols are:
A) 1-2-3-4
B) 2-4-1-3
C) 4-3-2-1
D) 3-1-4-2
Looking at the segment in Pic. 2, we could find the occurences of each symbol, for example "A" occurs 4 times, "B" occurs 3 times, "C" occurs 3 times and "D" occurs 3 times.
Since the baudrate of the signal, i.e. 150Bd, the real data-rate is 150/4 = 37.5 Baud. 

Pic. 1
Pic. 2
The repetitions of 4 symbols is clearly visible analyzing the demodulated bistream, unless some few errors due to the demodulation:

Pic. 3
 as well as the structure of the message seen as 48 bits period: some parts are well distinct
although it is unclear what they mean (sinc?, address?, commands?, ...)

Pic. 4

30 November 2015

Logs

09115.0 NPRD001 NPRD net, HRV 1225 USB MIL 188-141 2G-ALE sounding (29Nov15) (AAI)
09115.0 NPRD600 NPRD net, HRV 1039 USB MIL 188-141 2G-ALE sounding (29Nov15) (AAI)
19284.0 --- Russian Mil, RUS 0830 USB (cf) CIS-128 OFDM 6KHz "broadband" version 41.9BD 46.9Hz BPSK (28Nov15) (AAI)
14827.0 --- Russian (Mil/Diplo/Intel ?), RUS 1230 CIS-45 HDR modem v2/v1 40/30Bd 62.5Hz BPSK flwd +7 mins by X06c transmission (27Nov15) (AAI)
16166.0 --- prob. Russian Domestic system, RUS 0838 USB (cf) CIS FTM-4, MFSK-4 150Bd 4000Hz (tones at: -6, -2, +2, +6 KHz) (27Nov15) (AAI)
16255.0 --- Russian Mil, RUS 0825 CIS-128 OFDM 20.9Bd 23.4Hz QAM-16 (27Nov15) (AAI)
11153.0 I10 Ukrainian Forces, UKR 0805 USB MIL 188-141 2G-ALE sounding (27Nov15) (AAI)
08040.0 XS58 Algerian Mil, ALG 0745 USB MIL 188-141 2G-ALE calling PY50 (27Nov15) (AAI)
06905.0 WG01 Algerian Mil, ALG 0739 USB MIL 188-141 2G-ALE sounding (27Nov15) (AAI)
10000.0 BPM Time signal station Lintong/Xian, CHN 1359 A2A/CW/1000 hz ID "BPM" (26Nov15) (AAI)
19933.0 N55 Unid net (possibly Chinese Mil) 1003 USB MIL 188-141 2G-ALE calling A96 (25Nov15) (AAI)
16283.6 KWX57 US Diplo net 0940 USB MIL 188-141 2G-ALE calling KWS90 (25Nov15) (AAI)
07421.5 CHFEDR Greek Air Force, GRC 0811 USB MIL 188-141 2G-ALE calling LOIL1 (25Nov15) (AAI)
07421.5 CHFEDR Greek Air Force, GRC 0809 USB MIL 188-141 2G-ALE calling IVRG1 (25Nov15) (AAI)
06259.0 --- Unid 0748 USB (cf +550 Hz) MFSK-4 50Bd 100Hz (25Nov15) (AAI)
15626.0 --- Russian Domestic system, RUS 0830 USB (cf) CIS FTM-4, MFSK-4 150Bd 4000Hz (tones at: -6, -2, +2, +6 KHz) (24Nov15) (AAI)
14907.0 --- Unid 0733 USB MFSK-11 125Bd 250Hz ACF 790ms (24Nov15) (AAI)
13270.0 332018 Turkish Civil Defence, TUR 0721 USB MIL 188-141 2G-ALE sounding (24Nov15) (AAI)
14720.0 006 Unid net 0649 USB MIL 188-141 2G-ALE calling 003 (24Nov15) (AAI)
16341.0 --- Russian Mil, RUS 0930 CIS-45 HDR modem v2 40Bd 62.5Hz π/4-DQPSK (23Nov15) (AAI)
16121.0 Russian Intel/Diplo 0921 USB CIS-3000 serial 3000Bd PSK-8 flwd by MFSK-68 (34+34) QPSK 2400Bd 10Khz inserts (23Nov15) (AAI) (AAI)
16083.0 --- Russian Domestic system, RUS 0900 USB (cf) CIS FTM-4, MFSK-4 150Bd 4000Hz (23Nov15) (AAI)
15888.0 LAG Agerian AF Laghouat, ALG 0824 USB MIL 188-141 2G-ALE calling CM4 (23Nov15) (AAI)
15685.0 H40 Unid net 0755 USB MIL 188-141 2G-ALE calling H32, rptd several times (23Nov15) (AAI)
14634.0 --- Unid 1504 USB MIL 188-110 serial 2400Bd PSK-8 600bps/S (21Nov15) (AAI)
18038.0 --- Russian Mil, RUS 1422 CIS-45 HDR modem v2 40Bd 62.5Hz π/4-DQPSK, 1435 switched to DBPSK  (20Nov15) (AAI)


26 November 2015

CIS-128 and its ACF discrepancy

Looking at a CIS-128 signal heard this morning, I came across the discrepancy about its ACF value and the the right way to calculate it.
The signal exhibits the well known values of this waveform (64+64 channels, 20.9Bd speed and 23.5Hz step) but the modulation seems a BPSK with the add of 4 service tones: unfortunatelly, it's quite difficult to separate a single tone in order to confirm this mode. As it is common for CIS-128, a special char is sent each 5 symbols (Pic. 1) so that the expected value for the ACF should be ~239ms ...but looking for that value we get strong ~477ms spikes in SA module (Pic. 2): it's just the double, or else 10 symbol periods!
In my opinion, the reason for this double ACF is in the way the special chars are sent. 
By looking at the whole 477ms length frame in Pic. 3, it's visible - straining a bit the eyes - the right ACF period that occurs each 5 symbols (~239ms) just as it was expected: but the spec chars sent each 5 symbols are in some way alternately reversed as illustrated by the white-circled bits (Pic. 3). This way, these special chars seem to appear to the ACF-tool eyes as a sort of sequence like 

:: :: :: :: XY :: :: :: :: YX :: :: :: :: XY :: :: :: :: YX :: :: :: ::
and then the repetition period, according to its point of view, is logically 10 rather 5 symbols. Something like an optical illusion. 

Pic. 1
Pic. 2
Pic. 3
The same situation can be found analyzing the 6000Hz 'broadband version' of this waveform (Pic. 4).
In this case the ACF is ~238 ms BUT here the speed is double, so the special chars, which are sent each 5 symbols, should make ~119ms spikes: using the CCF measurement these chars are visible inside the red-marked circles (Pic. 5) and white-marked in the structure of the frame (Pic. 6).

Pic. 4
Pic. 5
Pic. 6

25 November 2015

Unid MFSK-4 50Bd 100Hz


Unidentified signal heard on 6259.0 KHz  (cf +550 Hz) at 0748z on 25 November. It consists of 4 channels separated by 100 Hz and manipulated at 50 Baud; the signal occupies a bandwidth of about 375 Hz. Signal quality is poor and affected by deep fading so that the signal results not well structured at analysis. ACF is 0 ms.


20 November 2015

logs

16241.0 ---: Russian Mil, RUS 1305 USB CIS-45 v1 HDR modem 33.33Bd 62.5Hz BPSK bursts (17Nov15)
16280.0 ---: Russian Intel/Diplo 0725 (cf) CIS-3000 serial 3000Bd flwd by MFSK-68 (34+34) + PSK-8 9000Bd/10KHz inserts (17Nov15)
14550.0 S31: Moroccan Mil, MRC 0910 USB MIL 188-141 2G-ALE sounding (16Nov15)
14720.0 006: Unid net 0908 USB MIL 188-141 2G-ALE calling 002 (16Nov15)
14421.0 BAL: Algerian AF, ALG 0852 USB MIL 188-141 2G-ALE calling CM3 (16Nov15)
14550.0 O5: Moroccan Army, MRC 0850 USB MIL 188-141 2G-ALE calling O8 (16Nov15)
14448.0 799: Unid net (prob from Kyrgyzstan) 0848 USB MIL 188-141 2G-ALE calling 780 (16Nov15)
14473.0 SS6BKHARSLWAAMR: Unid net 0838  USB MIL 188-141 2G-ALE calling SS5 (16Nov15)
14550.0 J62: Moroccan Mil, MRC 0830 USB MIL 188-141 2G-ALE sounding (16Nov15)
14715.0 ---: Russian Intel/Diplo 0820 (cf) CIS-3000 serial 3000Bd flwd by MFSK-68 (34+34) + PSK-8 9000Bd/10KHz inserts (16Nov15)
10311.0 MDN: Algerian Mil, ALG 0807 USB MIL 188-141 2G-ALE calling ND01 (16Nov15)
09202.0 ---: NATO AirDefence 0750 USB LIBK-11 CLEW (16Nov15)
09181.0 PY50: Algerian Mil, ALG 0741 USB MIL 188-141 2G-ALE calling XS56 (16Nov15)
09378.5 ---: Unid 0736 (cf+1500Hz on USB) R&S ALIS 228.65Bd/170 calling 410 (16Nov15)

18 November 2015

HFDVL modem tests: sync. preamble


Spanish Universities are still conducting intensive tests of the HFDVL modem (hfdvl-modem-ofdm-73-tone) on 14350.0 KHz on USB, I not tried  to listen on the other 14825.5 KHz test-frequency. While the previous tests consisted of transmission of about 30 and 10 seconds duration, in these samples (at least) a different "test format" is used: it seems to me that one side of the link just sends data (long signals) while the other peer seems just send a sort of ACK (shorter signals). The durations are fixed, ie 1'06'' and 0'11 secs. 

The tests involve two transmitting modems, more likely located at Las Palmas - Canary Islands (14350.0 KHz just belongs to the University of Las Palmas) and Madrid, since the HFDVL waveform is developed by the groups "CeTIC" from the Universidad de Las Palmas de Gran Canaria and "GAPS" from Universidad Politécnia de Madrid, other than Aeropuertos Españoles y Navegación Aérea. As far as I know, the modem manufacturer is MM CICOM Telecomunicaciones from Spain.

Prior to the transmission of data, a three part preamble is transmitted.
Part one consists of an initial unmodulated tone more likely used for Doppler correction. This tone is slighty shifted in the two signals (Pic.1) but just a few hz, so pretty meaningless though some distortion visible in ACK signals which could be due to a falut of modem (Pic. 1b). Looking at the Pic. 2, in 17-Nov recording the initial tone lasts for 
- 633.1/3 ms (19 signal element periods) in ACK signals 
433.1/3 ms (13 signal element periods) in DATA signals 
while in the 24-May recording the tone has a duration of 433.1/3 ms (13 signal element periods). Part two consists of  2 signal element periods of (KNOWN) data and part three consists of 1 signal element period of only even carriers followed by 3 signal element periods of only odd carriers: part two and three sum to 6 signals and make a 200ms duration (Pic. 3). 
My friend KarapuZ pointed my attention on the part two: according to his analysis, this is BPSK 2400Bd modulated and carrier is 60 Hz down-shifted in respect of the unmodulated tone frequency. The 60 Hz shift is probably added for the initial synchronization. Following his tips I replicated his results (Pic. 4).
 
Pic. 1

Pic. 1b
Pic. 2

Pic.3
Pic. 4

15 November 2015

logs

16285.0 STAT5 Tunisian MOI net, TUN 1020 USB sending mail in PacTOR-II (15Nov15)
16500.0 --- Chinese Mil 1420 LSB OFDM 30-tone bursts BPSK 60Bd (13Nov15)
14550.0 KB1 Moroccan Mil, MRC 1324 USB MIL 188-141 2G-ALE calling C3 (13Nov15)
14266.0 --- Russian Navy, RUS 1320 (cf) CIS AKULA FSK-2 500Bd/1000 (13Nov15)
14643.0 --- Russian Mil, 0830 USB CIS-112 OFDM 112-tone burst and stream mode (13Nov15)
14350.0 --- Unid, prob. Spanish Mil 0825 HFDVL OFDM 73-tone modem tests (13Nov15)
12085.0 --- Russian Diplo, RUS 0934 Serdolik sync marker (20 sec) rptd 0942,0946 (12Nov15)
10175.0 834 0850 USB MIL 188-141 2G-ALE sounding (11Nov15)
10417.5 B10 Unid (prob. UKR Mil) 0842 USB MIL 188-141 2G-ALE calling Z59 (rptd 0844) (11Nov15)
10565.0 --- Russian Mil, RUS 0829 CIS-60 OFDM 60-tone (11Nov15)
09953.0 --- Unid 0809 (cf) MFSK-11 125Bd 250Hz step (1'18") (11Nov15)
09889.0 SPT24 Polish Mil, POL 0807 USB MIL 188-141 2G-ALE calling SNB813 (11Nov15)
09300.0 SPI324 Polish Mil, POL 0803 USB MIL 188-141 2G-ALE calling LCR154 (11Nov15)
17426.0 --- Unid 0730 CW "847 847 847 TTT"  (11Nov15)
18100.0 R3  Moroccan military, MRC 1344 USB MIL 188-141 2G-ALE calling R65 (10Nov15)
15680.0 --- Unid Russian Mil, RUS 0837 USB CIS-45 HDR OFDM 35-tone BPSK 33.33Bd (10Nov15)
10311.0 --- Unid (prob. Algerian Mil) 0720 USB MIL 188-110 App.B OFM 39-tone DQPSK 44.44Bd (10Nov15)
06504.0 BB2 Israeli airforce, ISR 2209 USB MIL 188-141 2G-ALE sounding (09Nov15)
10171.0 --- Chinese Mil, CHN 2133 USB mixed mode QPSK 2400Bd + MFSK-8 125Bd (09Nov15)


14 November 2015

Chinese 30-tone LSB/USB waveform


These signals has been heard on 13 November on 16497.0 KHz USB (16500.0 KHz LSB) at 1420z, transmission was noised and of poor quality but this does not prevent a good study.
The preamble is composed of four QPSK modulated tones, 600 Hz shifted, starting from 650 Hz (USB tuned, Pic. 1). The pilot (doppler) tone is located in the higher part of the spectrum at 2550 Hz. The waveform uses 30 orthogonal subcarrier tones, 75 Hz spaced, with BPSK modulation and symbol rate 60 symbols/sec (Pic. 2) and it is transmitted in burst mode. The recording has been resampled at 7200 Hz, getting a better value for the "magic k" factor (=1/4). The whole waveform, 30 carriers + pilot tone, spreads ~2450 Hz.
As shown in Pic. 3, the waveform has exactly the same characteristics and the same OFDM values of the Chinese 30-tone, except for:
- the preamble and the position of the pilot tone (due to LSB/USB switch);
- the lenght of the bursts.

More likely this is the Chinese OFDM 30-tone "burst" with an amended lenght of the bursts, as Alipio pointed in his comments. Just as a final note, looking at the table in http://www.radioscanner.ru/info/article538/, this waveform is very similar to the one called as "MARCONI" (Pic. 4). 
Recording is availabe by a simple request.

Pic. 1
Pic. 2
Pic. 3
Pic. 4

13 November 2015

an HF Ionosonde "VIPIR"


This sample sounds like the Wallops Island WI937 HF Ionosonde "VIPIR" (Vertical Incident Pulsed Ionospheric Radar),  seen around 1330 UTC on the 12MHz band... although the vertical incidence leads to think to a similar radar close to my QTH.


A possible source could be the Istanbul VIPIR in Turkey:
http://istanbul.ionosonde.net/


Dynasonde is an advanced technique of ionospheric radio sounding, the only existing one that fully implements the phase-based methods of radio measurements. The dynasonde setup at the Ionospheric Observatory of the Istanbul Technical University is a continuously operating complex of the newest Scion HF Radar ("VIPIR") and the data processing software Dynasonde Software Suite 2012 including its 3-D plasma density inversion procedure.




9 November 2015

Logs

07739.0 4202: Algerian Sonatrach ALG 2117 USB MIL 188-141 2G-ALE sounding (03Nov15) (AAI)
07739.0 4212: Algerian Sonatrach ALG 2126 LSB MIL 188-141 2G-ALE sounding (03Nov15) (AAI)
07739.0 4216: Algerian Sonatrach ALG 2139 LSB MIL 188-141 2G-ALE sounding (03Nov15) (AAI)
07739.0 4227: Algerian Sonatrach ALG 2118 USB MIL 188-141 2G-ALE sounding (03Nov15) (AAI)
07739.0 5025: Algerian Sonatrach ALG 2112 USB MIL 188-141 2G-ALE sounding (03Nov15) (AAI)
08815.0 SCPTOC: US-Army Camp Bondsteel, HRV USB 1042 USB  MIL 188-141 2G-ALE sounding (08Nov15) (AAI)
10838.5 ---: Unid 0744 (cf+1500Hz on USB) R&S ALIS 228.65Bd/170 calling 197 (09Nov15) (AAI)
10886.0 ---: Unid 0758 USB THALES Système 3000 robust MFSK-8 (09Nov15) (AAI)
11106.0 EK9: Greek Military, GRC 0708 USB MIL 188-141 2G-ALE calling GEF (02Nov15) (AAI)
11226.0 200203: USAF C-17 Globemaster 00-0203 0901 USB  MIL 188-141 2G-ALE clg TAZCOMM (08Nov15) (AAI)
11350.0 HQ3: unid prob. GMRA Libya 1435 USB MIL 188-141 2G-ALE clg GANOB3 (09Nov15) (AAI)
11418.5 RMP: Baltic Fleet HQ Kalilingrad, RUS 0817 CW "RHO62 DE RMP QYT4 QSX 8302 ? K" (08Nov15) (AAI)
11476.0 CNC: Algerian AF HQ, Cheraga, ALG 0713 USB MIL 188-141 2G-ALE calling CM3 (02Nov15) (AAI)
13988.5 JMH4: Tokyo meteo J 0720 F3C/FAX 120/576 weather conds (02Nov15) (AAI)
14464.0 CHL: Algerian AF, ALG 0846 USB MIL 188-141 2G-ALE calling CM1 (02Nov15) (AAI)
14550.0 A2: Unid (prob. Moroccan Army?) 0904 USB MIL 188-141 2G-ALE calling A4 (02Nov15) (AAI)
14550.0 C3: Moroccan Army, MRC 0845 USB MIL 188-141 2G-ALE calling O5 (02Nov15) (AAI) 
14550.0 S3: Moroccan Army, MRC 0842 USB MIL 188-141 2G-ALE calling S42 (02Nov15) (AAI)
14615.0 99910: Egyptian MFA Cairo, EGY 0831 USB CODAN CALM selcall dst 11102 Paris embassy, followed by CODAN 9001 (02Nov15) (AAI) 
14862.0 ---: Unid 0852 USB MIL 188-141 App.B (02Nov15) (AAI)
14878.0 ---: Russian Mil 0847 USB CIS-3000 serial tone PSK-8 3000Bd acf=640mS (02Nov15) (AAI)
15843.0 ---: Russian Intel/Diplo 0847 (cf +1500Hz on USB) 5 x MFSK-16 channels, BPSK 250Bd inserts each 10 secs (05Nov15) (AAI)
15888.0 DJT: Algerian AF Djanet, ALG 0837 USB MIL 188-141 2G-ALE clg CM4 (05Nov15) (AAI)
16102.0 ---: Unid Iranian net (prob. navy?) 1356 (cf) Iranian-QPSK 468.75 Baud (09Nov15) (AAI)
16103.0 ---: Russian Mil 1432 USB CIS-112 OFDM modem 22.22BD BPSK (05Nov15) (AAI)
16120.0 ---: (callsign not heard/sent) 0906 USB USB MIL 188-141 2G-ALE clg MNB (05Nov15) (AAI)
16283.5 ---: (callsign not heard/sent) 1259 USB  MIL 188-141 2G-ALE clg KWV71 US Diplo Ankara (05Nov15) (AAI)
16285.0 STAT11: Tunisian MOI net, TUN 0932 USB  MIL 188-141 2G-ALE clg TUD followed by mail in PacTOR-II (05Nov15) (AAI)
16643.0 ---: Russian Mil 0834 USB CIS-112 OFDM modem 22.22Bd BPSK (02Nov15) (AAI)
18041.0 ---: Russian Intel/Diplo 0847 (cf) 5 x MFSK-16 channels, 20Hz spaced, 10Bd, embedded BPSK 250Bd inserts each 10 secs (02Nov15) (AAI)
18100.0 A2: Unid (prob. Moroccan Army?) 0922 USB MIL 188-141 2G-ALE calling A5 (03Nov15) (AAI)
18450.0 LEB: Unid network 0943 USB MIL 188-141 2G-ALE clg KUL (03Nov15) (AAI)
18650.0 LEB: Unid network 0742 USB MIL 188-141 2G-ALE clg KUL (06Nov15) (AAI)
18670.0 LEB: Unid network 0740 USB MIL 188-141 2G-ALE clg KUL (06Nov15) (AAI)
18895.0 LEB: Unid network 0836 USB MIL 188-141 2G-ALE TWAS to KUL (03Nov15) (AAI)
19052.0 ---: Russian Intel/Diplo 1250 (cf +1500Hz on USB) 5 x MFSK-16 channels, BPSK 250Bd inserts each 10 secs (06Nov15) (AAI)
19099.0 S11a: Enigma S11a 0718 J3E female sending  382/00 (04Nov15) (AAI)
19150.0 LEB: Unid network 0743 USB MIL 188-141 2G-ALE clg KUL (06Nov15) (AAI)
19450.0 LEB: Unid network 0709 USB MIL 188-141 2G-ALE clg KUL (04Nov15
19550.0 LEB: Unid network 0719 USB MIL 188-141 2G-ALE clg KUL (04Nov15) (AAI)
19592.0 ---: Unid 0825 (cf +1500Hz on USB) BPSK 1200Bd alternating 11 carriers 150 Hz spaced (06Nov15) (AAI)
19670.0 LEB: Unid network 0721 USB MIL 188-141 2G-ALE clg KUL (04Nov15) (AAI)

5 November 2015

MIL 188-110C App.D: BW24 KHz, SR19200 Bd, QAM-64


 

Cross Correlation Function returns 106.6 ms (Pic. 2) and highlighting a single frame it can be seen that the length of the mini-probe is worth 6.8 ms (Pic. 3): since the baudrate (19200 Bd), it makes ~130 symbols length. Now, looking at Table-D for 24KHz bandwidth waveforms (Pic. 4), this value (~130 symbols) can be assumed as 128 and consequently the data segment consists of 1920 symbols: this way we get (128 + 1920) 2048 symbols per frame that generate a 106.6ms ACF,  and 'salright (*). So, the waveform number may be 11 (64-QAM) or 12 (156-QA). The value of the carrier can be obtained in the fourth degree, wich is characteristic of QAM modulation (Pic. 5), and - althought it's not so clear - the typical 5 rings of QAM-64 are distinguished in the phase-plane constellation (Pic. 6).

Pic. 1 - 24 KHz bandwidth and 19200 Baud
Pic. 2 - CCF
Pic. 3 - Mini-Probe lenght
Pic. 4
Pic. 5 - detecting baudrate, carrier ad harmonics of the signal
Pic. 6 - the 5 rings (hardly distinguishable) correspond to QAM-64
(*) 'salright, it's all right, as Lennon sings here (Whatever Gets You Through The Night)

4 November 2015

logs

13840.0 --- Russian Intel/Diplo 1420 (cf) CIS MFSK-68 (34+34) (31Oct15)
13498.5 --- Russian Intel/Diplo 1230 (cf) 5 x MFSK-16 channels, 20Hz spaced, 10Bd, embedded BPSK 250Bd inserts each 10 secs (30Oct15)
13858.5.--- Russian Mil 0740 USB CIS-128 OFDM modem broadband 6KHz wide (29Oct15)
18003.0 460029 USAF KC-10 #86-0029 (REACH 549) 1127 USB MIL 188-141 ALE clg CRO USAF Croughton
flwd by handshake and operators chat (28Oct15)
14401.5 --- Unid 0732 USB MIL 188-110 App.B OFDM 39-tone 44.44Bd p/4 DQPSK (28Oct15)
08050.0 CS001 0720 USB MIL 188-141 ALE clg RS002 flwd by handshake and MIL 188-110 serial (28Oct15)
09187.0 --- Unid 0709 USB MIL 188-141 App.B ALE Link Protected mode (28Oct15)
19400.0 --- Russian Mil 0656 USB CIS-112 OFDM modem 22.22BD BPSK (28Oct15)
14425.0 BA1 Polish military, POL 0650 USB MIL 188-141 ALE clg SZ1 flwd by handshake and MIL 188-110 serial (28Oct15)
14700.0 STAT1 Tunisian MOI net, TUN 0842 USB MIL 188-141 ALE clg STAT154 flwd by PacTOR-II traffic "#HFARQ#STAT154" (27Oct15)
14813.0 A99 Chinese net, CHN 0823 USB MIL 188-141 ALE clg D54 (27Oct15)
14550.0 X24 Moroccan mil, MRC 0821 USB MIL 188-141 ALE sounding (27Oct15)
14550.0 J61 Moroccan mil, MRC 0814 USB MIL 188-141 ALE sounding (27Oct15)
14550.0 P53 Moroccan mil, MRC 0809 USB MIL 188-141 ALE sounding (27Oct15)
14550.0 X34 Moroccan mil, MRC 0807 USB MIL 188-141 ALE sounding (27Oct15)
07744.0 CS002 Unid (prob Macedonian mil) 0744 USB MIL 188-141 ALE cld RS008 flwd by MIL 188-110 serial 2400bps/long (27Oct15)
18255.0 --- Unid 0820 USB BPSK 100Bd/1200Bd (26Oct15)
14719.0 --- Unid (prob. Russian Diplo) 0903 (cf) F1B 186.6Bd/850 (25Oct15)
10176.0 TUD Tunisian MOI, TUN 0746 USB MIL 188-141 ALE clg STAT21 flwd by handshake (25Oct15)
15918.0 CFH Canadian Forces Halifax, CAN 2055 USB STANAG-4285 75/L "NAWS DE CFH ZKR F1 2822 3394 4158 6242 8324 12371 16552 AR" (23Oct15)
16343.0 --- Russian (Domestic system ?) 0820 USB CIS FTM-4 MFSK-4, Br-150, Shift-4000 (23Oct15)
13230.0 --- North Korean Diplo, PRK 0638 LSB ARQ 1200Bd/1200 (23Oct15)
12071.0 --- Russian Mil, RUS 0635 USB CIS-45 OFDM modem (23Oct15)
16683.0 OSY Sailmail Brugge, BEL 1519 USB PacTOR-III "OSY QTC 2 msg 4351" (22Oct15)
16240.0 11121 Moroccan police, MRC 1520 USB MIL 188-141 ALE sounding (22Oct15)
16283.7 KWT94 US Dept of State office 1510 USB MIL 188-141 ALE sounding (22Oct15)


1 November 2015

Why I think this is Harris rather than Thales


I think this signal is the Harris "RF-5800 selective call" waveform, parameters as the speed, modulation and ACF fit fine, although they are the same than Thales Systeme-3000 ALE (pic. 1): unfortunately these two ALE signals have the same OTA parameters but not compatible at binary level due to proprietary adds.
This argument was already discussed here and this time I have an almost safe argument in favour of the 'Harris' identification: if you look at the signal you may see some voice segments and listening to them reveals a radio-check, in Spanish, between the operators callsigns "mercurio" and "830", briefly:
- 830 from mercurio k
- here mercurio, how copy me k
As you can see in the link below, "mercurio" is a Communications (HF and VHF) BMR in service in the Spanish Army (BMR 3560.56, aka "BMR Mercurio 2000"):
http://www.ejercito.mde.es/en/unidades/Las_Palmas/ciatrans16/Organizacion/materiales/index.html 
But more likely, from searches in the web, "mercurio 2000" could also be the name of a set of communications equipment that is installed in vehicles of the Spanish Army such as Vamtac, BMR or even Land Rover (!):
Now, download this pdf and take a look at page 10: the new VAMTAC will replace MERCURIO comm-vehicles starting from Jan 2013, and just below the picture you can read a mention just about the Harris RF-5800 that is used as HF equipment set (pic. 2): 

So:
- since these new VAMTAC vehicles are equipped with Harris RF-5800 
- since the communication vehicles seen above belong to the same (mil) network
there is no reason because "MERCURIO" should use (or be) a different proprietary equipement (as Thales, in this case) that would cause  interoperability issues inside the comm. network.

It remains to observe, in my opinion, that while logging these signals it's hard to say Harris rather than Thales, and vice-versa, without some other useful item such as an on line chat (as in this case) or a well-known working frequency.

Pic. 1
Pic. 2