ldpc_2fold_general================== LDPC codes are Low Density Parity Check codes used in favor ofconvolutional codes. Usually they are calculated on a SISO channel.This module tries to enhance the case for a 4x4 MIMO channel. Thetheory has been written down by Nicolae Chiurtu.ldpc_decode_2fold_general-------------------------LDPC-decoder using the 2fold-techinque to decode a stream coming from aMIMO environment.Inputs:	SYMBOL_COMPLEX[4]outputs:	U8Config:	chest [MAX_NO_RX]<int>: [-1 -1 -1 -1]		Block-id of the ChEst  blocks. They will provide H	iterations<int>: 30		The total iteration-number. For each iteration, iterations_left		followed by iterations_right are done.	iterations_left<int>: 1		How many iterations to the left are done per total iteration	iterations_right<int>: 1		How many iterations to the right are done per total iteration	ldpc_code_id<int>: 1		The ID of the LDPC code	no_rx<int>: 4		How many output channels	no_tx<int>: 4		How many input channelsStats:	snr<double>:		The calculated SNR in case of a AWGN channelldpc_decode_2fold_general_ics-----------------------------LDPC-decoder using the 2fold-techinque to decode a stream coming from aMIMO environment.Inputs:	SYMBOL_COMPLEX[4]outputs:	U8Config:	channel_param<double>: 0.07		'a/variance' for AWGN	chest [MAX_NO_RX]<int>: [-1 -1 -1 -1]		Block-id of the ChEst  blocks. They will provide H	drop_blocks<int>: 0		How many blocks to drop	iterations<int>: undef		The total iteration-number. For each iteration, iterations_left		followed by iterations_right are done.	iterations_left<int>: undef		How many iterations to the left are done per total iteration	iterations_right<int>: undef		How many iterations to the right are done per total iteration	ldpc_code_id<int>: 1		The ID of the LDPC code	no_rx<int>: 4		How many output channels	no_tx<int>: 4		How many input channelsStats:	snr<double>:		The calculated SNR in case of a AWGN channelldpc_encode_2fold----------------- Encodes a slot. Needs to have a modulator-module with a QPSKmodulation.Inputs:	U8outputs:	U8Config:	bplcn<int>: 0		Bits per left check node, for a QPSK transmission, this is		the number of TX-antennas * 2	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