Performance of Turbo Product Code Decoding in Wireless Communication

Abstract — In this paper, the effect of TPC decoding using Chase-II algorithm with reduced number of test patterns (TPs) is evaluated using the AWGN channel in orthogonal frequency division multiplexing (OFDM) mode. The TPC is constructed with multi-error-correcting extended Bose-Chaudhuri-Hocquengem (eBCH) codes. TPs are classified into different conditions based on the relationship between syndromes and the number of errors so that TPs with the same codeword are not decoded except the one with the least number of errors. The parameters considered are bit error rate (BER), Eb/N0, data rate and code rate. The research contribution shows that the percent of TPs need to be decoded for eBCH(128, 113, 2) when p = 2 for 1st iteration it is between 22 %- 16 % and from 5th iteration onwards it is between 14 %- 12 % for SNR = 1.5dB, 1.8dB, 2.0dB, 2.2dB, 2.4dB and 2.5dB in 802.16 system, respectively. This research contribution helps to make the 802.16 systems simpler, reduces the decoding time, complexity and improves the performance