Multi-band orthogonal frequency division multiplexing (MB-OFDM) has been considered as a prominent solution for ultra wideband (UWB) technology supporting high speed, short range and point-to-point wireless communications. In this paper, we design quasi-cyclic (QC) low-density parity-check (LDPC) codes that are modified from implementation-oriented (IO) LDPC codes and examine their capability and suitability for MB-OFDM systems in terms of performance and implementation complexity. We evaluate the performance of QC-LDPC codes over MB-OFDM systems for four different data rate. By simulations, it is shown that the transmission distance of QC-LDPC coded MB-OFDM systems can increase by 29%-73% compared with that of convolutional codes. In addition, it is shown that QC-LDPC codes can be realized by a rate-configurable encoder and decoder.
|Original language||English (US)|
|Number of pages||4|
|Journal||Proceedings - IEEE International Symposium on Circuits and Systems|
|State||Published - Dec 1 2005|
|Event||IEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan|
Duration: May 23 2005 → May 26 2005