Title :
A New Wireless Access Scheme: Novel Punctured LDPC Coded Ultra-wideband System
Author :
Chen, Fangni ; Li, Shiju ; Wang, Yanbo
Author_Institution :
Dept. of ISEE, Zhejiang Univ., Hangzhou
Abstract :
Ultra-wideband (UWB) technology has attracted much attention in high speed indoor wireless communications. UWB communications have transmitted power limitations according to FCC regulation. To face this drawback, while still maintaining significant error correction capabilities, we propose a novel punctured low-density parity-check (LDPC) coding scheme for multiband OFDM (orthogonal frequency division multiplexing) UWB systems in this paper. Different from the randomly punctured coding, we puncture the variable nodes on their degrees. We fix the target SNR threshold of the punctured code and optimize (maximize) the puncturing fraction for that threshold. From our analysis and numerical results, we find that this new scheme gives a significant performance gain compared with the randomly punctured scheme.
Keywords :
OFDM modulation; error correction; indoor radio; parity check codes; ultra wideband communication; FCC regulation; SNR threshold; error correction capabilities; high speed indoor wireless communications; low-density parity-check coding scheme; multiband OFDM; orthogonal frequency division multiplexing UWB systems; punctured LDPC coded ultra-wideband system; wireless access scheme; Bandwidth; Energy capture; Error correction codes; FCC; Forward error correction; OFDM; Parity check codes; Ultra wideband communication; Ultra wideband technology; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th
Conference_Location :
Dublin
Print_ISBN :
1-4244-0266-2
DOI :
10.1109/VETECS.2007.617