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This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in

snr
===


 A module to test independently the SNR of the received slot. This is to
compare against the SNR calculated by the matchde_filter. The sending and
reveiving module both need an input of the same random-bytes.
 SNR - measure the signal to noise ratio of a transmitted slot. 
In order to do this, we send a slot of known random data that
is measured on the other side.


snr_rcv
-------

This module receives the stream from the matched filter
and the stream of random-signals that are supposed to be
the same that have been used by the snr_send. It then
calculates the amplitude, the variance and the snr.

Inputs:
	SYMBOL_COMPLEX
	U8

Config:
	type<int>: 0
		The QPSK-type, 0->in the corner, 1->on the axes


Stats:
	amp<int>:
		The calculated amplitude

	snr<double>:
		The calculated SNR, in dB

	var<int>:
		The calculated variance


snr_send
--------

This module expects some random input that is then modulated
using QPSK modulation so that the noise can be mesured.

Inputs:
	U8

outputs:
	SYMBOL_COMPLEX

Config:
	amplitude<int>: 32767
		The amplitude of the generated QPSK-signal

	type<int>: 0
		The QPSK-type, 0->in the corner, 1->on the axes