Title :
Quasi-cyclic low-density parity-check coded multi-band-OFDM UWB systems
Author :
Kim, Sang-Min ; Tang, Jun ; Parhi, Keshab K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Minnesota Univ., USA
Abstract :
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 rates. 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.
Keywords :
OFDM modulation; channel coding; cyclic codes; data communication; decoding; parity check codes; radio links; ultra wideband communication; variable rate codes; MB-OFDM; QC-LDPC codes; UWB technology; data rates; high speed wireless communications; implementation complexity; low-density parity-check codes; multi-band OFDM; orthogonal frequency division multiplexing; performance; point-to-point wireless communications; quasi-cyclic UWB systems; rate-configurable decoder; rate-configurable encoder; short range wireless communications; ultra wideband technology; Parity check codes;
Conference_Titel :
Circuits and Systems, 2005. ISCAS 2005. IEEE International Symposium on
Print_ISBN :
0-7803-8834-8
DOI :
10.1109/ISCAS.2005.1464525
