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Showing posts with label QAM. Show all posts
Showing posts with label QAM. Show all posts
29 August 2025

Link-22 12QAM waveform

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Fig. 1 - Link-22 transmission Recently my friend ANgazu from  radiofrecuencias.es sent me a great catch of a Link-22 transmission - Figure...
26 August 2019

6 KHz wideband OFDM-160 PSK2/QAM-16

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6 KHz wideband OFDM-160 30.469 Bd/37.5 Hz PSK2 & QAM-16 spotted on 10342 KHz (CF), probably it's connectd to the OFDM-80 seen a fe...
7 February 2019

odd signals picked-up using the Arctic KiwiSDR

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7600 Hz wideband signals from (only!) Kiwi ArcticSDR and using single tone QAM-64 modulation at a symbol rate of 7200Bd. The signals seem ...
9 October 2018

S5066 data transfer, scaling from 3200bps (QPSK/PSK8 on-air) up to 9600bps (QAM64)

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8th October update : using "Wireshark" software to detect IP packets (IP over HF) 13378.0 KHz/USB, 0848z: S5066 data transfer ...
24 July 2018

the unid Kongsfjord OFDM (1)

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If you open the Norwegian Kongsfjord kiwiReceiver and tune to 468 kHz/usb you will find a continous signal 12 kHz wide with a carrrier...
29 July 2016

STANAG-4538, HDL+ BW7 waveforms

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Bearing in mind the results and considerations about STANAG-4538 HDL+ protocol, as reported in the previous post , one can easily face the...
5 November 2015

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

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  Cross Correlation Function returns 106.6 ms (Pic. 2) and highlighting a single frame it can be seen that the length of the mini-prob...
8 October 2015

CIS-128 broadband (6 KHz) waveform

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Broadband waveform (6 KHz) of the CIS-128 OFDM modem. The values of the manipulation speed and carriers separation are the double of th...