Space-time transmit diversity (STTD) and space-time block codes (STBC) are the attractive techniques for high bit-rate and high capacity transmission. Recently, low-density parity-check (LDPC) codes have attracted much attention as the good error correcting codes achieving the near Shannon limit. The concatenation schemes of LDPC codes and STBC (LDPC-STBC), and Turbo codes and STBC (Turbo-STBC) have been proposed. The performance of the LDPC-STBC is better than that of the Turbo-STBC on a flat Rayleigh fading channel. The performance of LDPC code can be analyzed by density evolution (DE). In this paper we analyze the performance of the LDPC-STBC by using DE. Also, we optimize the irregular LDPC codes for the LDPC-STBC by using DE. Furthermore, we evaluate the error rate performance of the optimized irregular LDPC codes and the regular LDPC codes for the LDPC-STBC. From the numerical and simulation results, we show that the LDPC-STBC with the irregular LDPC codes achieves the better error rate performance than the LDPC-STBC with the regular LDPC codes.
|Number of pages||5|
|Publication status||Published - 2004 Dec 1|
|Event||GLOBECOM'04 - IEEE Global Telecommunications Conference - Dallas, TX, United States|
Duration: 2004 Nov 29 → 2004 Dec 3
|Other||GLOBECOM'04 - IEEE Global Telecommunications Conference|
|Period||04/11/29 → 04/12/3|
ASJC Scopus subject areas