ldpc_siso_ics============= LDPC codes are Low Density Parity Check codes used in favor ofconvolutional codes. They are quite experimental and not widelytested. Furthermore this module is not optimsed at all! This has been adapted a bit to the ICS-cardsldpc_decode_siso_ics-------------------- Tries to decode the received slot. As it is really slow to do this,this module should be SUBS_MSG_THREADed so that it has more than oneslot's time to decode.Inputs:	SYMBOL_COMPLEXoutputs:	U8Config:	chest<int>: -1		Define the matched filter to calculate the correct a/variance	drop_blocks<int>: 0		How many blocks to drop	iterations<int>: 30		The number of iterations that are done to decode the message.		Each iteration contains a cnode->vnode->cnode cycle	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 3992Stats:	snr<double>:		The calculated SNR in case of a AWGN channelldpc_encode_siso_ics-------------------- Encodes a slot. Needs to have a modulator-module with a QPSKmodulation.Inputs:	U8outputs:	U8Config:	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