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wideband operations on 4950 KHz, new Harris wideband HF waveforms

since few weeks me and my friend and colleague ANgazu are studying interesting wideband waveforms family spotted on 4950 KHz (central frequency), just in the middle of the 60 mt Broadcast band, these...

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8-ary constellation bursts at 12800bps data rate (3)

This is a follow-up of the posts about the "clusters" of S4539 12800bps bursts, all posts including this one are grouped here.Since a couple of days it's possible to hear both the peers, don't know if...

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odd signals picked-up using the Arctic KiwiSDR

7600 Hz wideband signals from (only!) Kiwi ArcticSDR and using single tone QAM-64 modulation at a symbol rate of 7200Bd. The signals seem to have specular positions of a "supposed" reference/pilot...

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unid signals from US KiwiSDRs by ANgazu & Rapidbit

This signal was recorded tuning 5308 Khz and using some KiwiSDRs from the northeast of the US, mainly the one owened by K3FEF in Milford (PA). Since its various operating modes and its uncommon...

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STANAG-5030/MIL-188-140 VLF/LF multichannel broadcast to submarines (2)

(this is a follow-up of the post published here)The narrow 200Hz bandwidth for VLF/LF submarine broadcast and the low efficiency of the aerials are limiting factors, but the use of MSK (a form of QPSK)...

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use of uuencode for email attachments (Swiss-Mil)

This post is an update, mostly a deepening, of the posts published here and here with regards to the way of sending email used by Swiss-Mil. The idea came from a hint from my friend Mike "mco", whom I...

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Harris WB operations and UK MoD XMPP over HF: interesting confirmations

Reading the Harris and Isode-Babcock presentations at the recent HFIA Meeting in San Diego, CA (February 14, 2019) I had an interesting feedbacks which could confirm the guess I did about:1) new...

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Aus ADF/ MHFCS FSK 600Bd/850 with KW-46 encryption

Quite good FSK 600Bd/850 signal centered on 10405 KHz from Australian Defence Force (ADF/MHFCS), heard some days ago around 1630z using iw2nke KiwiSDR (center Italy). As reported in UDXF logs by Eddy...

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CCIR-493 CODAN selcall FSK 100Bd/170 (4-digit IDs, 1000ms preamble)

Several 3 KHz spaced channels which use the CCIR-493 CODAN Selcall FSK 100Bd/170 (4-digit IDs), spotted on 8MHz using Hong Kong KiwiSDR http://kb7gkh6.proxy.kiwisdr.com:8073.The system is a synchronous...

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8-ary constellation bursts at 12800bps data rate (4)

Just another followup about the 8-ary constellation bursts. By the way, I also want to point out the interesting work that Christoph is pursuing in his blog.Recently, Martin G8JNJ pointed out two new...

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Harris wideband operations, WHARQ and WBALE waveforms (2)

Recently we had the chance to monitor and record the wideband transmissions on 7.9 MHz thanks to the use of four fairly close together KiwiSDRs [1] (we think transmitters use low power and NVIS) and...

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9MR Royal Malaysian Navy, simultaneously on two FSK channels

"RY/SG" test tape continuously transmitted by 9MR Royal Malaysian Navy (RMN) [1], spotted thanks to the KiwiSDR owned by SWLOI33 in Jakarta, Indonesia. The interesting aspect is that the test is...

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OFDM-30 (+1 pilot, +2) MSK 50Bd possibly Chinese modem?

The signal was recorded at 8403.5 KHz (CF) thanks to the use of some KiwiSDRs [1], it occupies a bandwidth of 2500 Hz  and seemigly consists of 35 tones (Fig. 1a). The lower tone (in case of USB) most...

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why use of scrambling

Some days ago a friend of mine drop me an email asking about a signal recorded at 428 MHz. It's clearly an FSK modulation (probably GFSK) at the rate of 318124 bps as shown in Fig. 1, but the most...

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KW-46 secured traffic over 188-110A, prob. US/Australian NCS HEH

These signals were recorded and monitored on 14462.0 KHz/USB thanks the KiwiSDRs at OI33 and OI33SA in Jakarta, Indonesia:http://ptlenkiwisdr.ddns.net:8073/?f=14462.00usbz10...

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THALES HFXL, "wide band link" phase? (tentative) AngazU, i56578

In our recent THALES HFXL monitorings we noted an initial "leader" burst which is exchanged in each frequency of the channel between the peers, the exchanges occurs after the 2G-ALE phase and just...

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KG-84, KW-46, ...

In this blog I often use terms like "KG-84", "KW-46", "BID",..., as well as the names of other cryptographic devices, but this does not necessarily mean that those devices are physically used ashore or...

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KW-46/KIV-7M secured fleet broadcast using the GA-205 multiplex (Australian RAN)

This is a very interesting STANAG-4285 signal spotted on May 24 on 6378.0 KHz USB thanks to the KiwiSDR owned by VK6QS in Collie, Western Australia. About the 6378 KHz, some old WUN logs report the...

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STANAG-4285 1200bps/L in async mode

Interesting recording of STANAG-4285 1200bps/L blocks which transport 8N1 framed streams (async ops).Fig. 1After demodulation (I preferred to use my Harris RF-5710A modem), each block consists of 476...

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XMPP over HF radio using STANAG-5066

(updated)Interesting transmissions spotted on 4381.0 KHz and 4833.5 KHz (all usb) consisting of MIL 188-110A Serial HF waveform (fixed 600bps/S) and 6-bit code clear text (6x28) & STANAG-5066 as...

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