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Re: [Discuss-gnuradio] TETRA demodulator advices
From: |
Timothée COCAULT |
Subject: |
Re: [Discuss-gnuradio] TETRA demodulator advices |
Date: |
Sun, 06 Dec 2015 20:47:43 +0100 |
Hi Tom.
First, thank you for your answer.
Le mar. 1 déc. 2015 à 16:33, Tom Rondeau <address@hidden> a écrit :
I know that it's a lot of work, I just wanted to know if, at a first glance, something looked out of place.
I'm sometimes lost in GNU radio when I have to choose a block among several that seem to do the same thing.
The main purpose of the FLL is to compensate the thermal offset of a crappy RTL-SDR device so it doesn't need to be really fast.
I'll try to increase the cutoff frequency first, and see how it reacts with the adjacent channels.
I've looked into that but I'm afraid some blocks won't play well with the constellation class (for example, they expect a constellation to have 2**(bits) points, but PI/4 DQPSK uses 2 bits and has 8 points).
I think I will stay with the flowgraph approach for now.
Best,
Timothée.