LDPC codes BER simulation under AWGN channel. MacKay-Neal based LDPC matrix. Message encoding uses sparse LU decomposition. There are 4 choices of decoder: hard-decision/bit-flip decoder, probability-domain SPA decoder, log-domain SPA decoder, and si

LDPC codes BER simulation under AWGN channel. MacKay-Neal based LDPC matrix. Message encoding uses sparse LU decomposition. There are 4 choices of decoder: hard-decision/bit-flip decoder, probability-domain SPA decoder, log-domain SPA decoder, and si

The system capacity is defined as the maximum possible transmission rate such that the probability of error is arbitrarily small. Initially, we assume that the channel matrix is not known at the transmitter, while it is perfectly known at the r

MIMO注水算法，仿真系统容量，信道H奇异值分解后V矩阵的PDF.亲测可运行。-The Capacity of a MIMO channel with nt transmit antenna and nr recieve antenna is analyzed. The power in parallel channel (after SVD decomposition) is distributed as water-filling algorithm the pdf of the matri