NDLI: Performance studies of a multi-band OFDM system using a simplified LDPC code

Content Provider	IEEE Xplore Digital Library
Author	Khiam-Boon Png Xiaoming Peng Chin, F.
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore (Khiam-Boon Png)
Abstract	Ultra-wideband (UWB) is a promising radio technology for networks delivering extremely high data rates at short ranges. Multi-band orthogonal frequency division multiplexing (MB-OFDM) is a suitable solution to implement high speed data in ultra wideband spectrum by dividing the available spectrum into multiple bands. MB-OFDM achieves adaptability as well as high performance, low-power and low-cost characteristics through the usage of OFDM. Due to the importance of error correcting codes for OFDM systems, it is essential to employ a powerful error correcting code for the MB-OFDM system to improve the performance. Recently, low-density parity-check (LDPC) code has attracted great attention because it achieves bit error rate near to the Shannon limit. In this paper, we design and evaluate the performance of the MB-OFDM system using LDPC code. In order to simplify the implementation of the LDPC encoder and decoder, we introduce a joint code and decoder design approach to construct a class of (3, k)-regular LDPC code which exactly fits to a partly parallel decoder implementation. The simulations show that the performance of such a simplified LDPC coded MB-OFDM system is better than that of a convolutional coded MB-OFDM system, and is very close to that of the conventional LDPC coded MB-OFDM system. The implementation complexity of the simplified LDPC code is carefully examined subsequently in the paper.
Sponsorship	YRP R&D Promotion Committee Nat. Inst. of Inf. and Commun. Technol. (NICT) COE Program, Yokohama Nat. Univ
Starting Page	376
Ending Page	380
File Size	376936
Page Count	5
File Format	PDF
ISBN	0780383737
DOI	10.1109/UWBST.2004.1320999
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-05-18
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	OFDM Parity check codes Error correction codes Error analysis Ultra wideband technology Iterative algorithms Signal to noise ratio Convolutional codes Iterative decoding Indoor communication
Content Type	Text
Resource Type	Article

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