The numbers of the VNs
of degree 2, 3, 5 and 10 are 104, 22, 11 and 5 respectively. The
codeword bitstream is BPSK modulated and transmitted over
a BI-AWGN channel. Decoding is done by the Fast Fourier
Transform based q-ary sum product algorithm (FFT-QSPA)
[13] with the maximum number of iterations set at 50.