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

ldpc_sse2
=========


This is the optimised version of the message-passing LDPC-decoder.
SSE2 has been used to speed up the message-passing.


ldpc_decode_sse2
----------------

This is the optimised part of the LDPC - the decoder. It uses quite
a sophisticated scheme to get all out of the SSE2-extension.
Nevertheless, it still takes too long for a real-time, 5MHz bandwith
QPSK decoding...

Inputs:
	SYMBOL_COMPLEX

outputs:
	U8

Config:
	channel_param<double>: 0.07
		either 'p' for a BSC channel or 'a/variance' for a AWGN

	channel_type<int>: 1
		The type of the channel: 
		1:BSC
		2:AWGN

	iterations<int>: 30
		Number of iterations

	ldpc_code_id<int>: 1
		The index of the ldpc-code. For the moment, three codes
		are implemented:
		1 - rate .25, size 4000
		2 - rate .5, size 3992
		3 - rate .75, size 3992

	mafi<int>: -1
		Define the matched filter to calculate the correct a/variance.
		If this is defined, channel_param won't be used.


Stats:
	snr<double>:
		The calculated SNR


ldpc_encode_sse2
----------------

The encoder-part of the LDPC coder. This is not optimised.

Inputs:
	U8

outputs:
	U8

Config:
	ldpc_code_id<int>: 1
		The index of the ldpc-code. For the moment, three codes
		are implemented:
		1 - rate .25, size 4000
		2 - rate .5, size 3992
		3 - rate .75, size 3992