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From: | Vitt Benv |
Subject: | Re: [Discuss-gnuradio] Which block for Fast PSK demodulation under some doppler shift? |
Date: | Fri, 28 Apr 2017 15:03:37 +0200 |
Dear All,
I have a situation where I need to demodulate a wide bandwidth signal (70
Mbps QPSK modulated, having 35 MHz IF bandwidth and sampled at 105 MSPS ) in
our lab. However, the signal generator will also add some amount of doppler
shift at a rate of 1 kHz/s. Which PSK demodulation blocks are suitable for
fast demodulation under some doppler shift. I
I know that I can not use the Costas Loop or any other block that uses a
feedback loop because of their speed limitations.
I am considering to add a preamble to simplify things since I know high
speed Satellite downlinks use Preamble. I guess the use of preambles make
demodulation easier.
Please advise.
--
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