Quasi-cyclic low-density parity-check coded multiband-OFDM UWB systems

Sang Min Kim, Jun Tang, Keshab K Parhi

Research output: Contribution to journalConference articlepeer-review

12 Scopus citations


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 languageEnglish (US)
Article number1464525
Pages (from-to)65-68
Number of pages4
JournalProceedings - IEEE International Symposium on Circuits and Systems
StatePublished - Dec 1 2005
EventIEEE International Symposium on Circuits and Systems 2005, ISCAS 2005 - Kobe, Japan
Duration: May 23 2005May 26 2005


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