Title :
Enhanced Log-Likelihood Ratio Calculation for LDPC Coded SC-FDE Systems in 60-GHz Millimeter-Wave WLAN/WPAN
Author :
Zhu, Dalin ; Lei, Ming
Author_Institution :
Dept. of Wireless Commun., NEC Labs. China (NLC), Beijing, China
Abstract :
Single-carrier frequency domain equalization (SC-FDE) has been standardized as an alternative of orthogonal frequency division multiplexing (OFDM) in IEEE 802.11ad and 802.15.3c. In addition, with the use of low density parity-check (LDPC) codes, multi-Giga bits transmission can be supported in 60-GHz millimeter-wave (mmW) WLAN/WPAN with desired decoding complexity. In this paper, we present and evaluate an enhanced log-likelihood ratio (LLR) calculation method to facilitate the LDPC decoding in SC-FDE. In contrast to the virtual channel (VC) based LLR calculation approach (i.e., the Unique Word (UW) tracking scheme), our proposed method exhibits better bit error rate (BER) performance, and is more spectrally efficient.
Keywords :
error statistics; parity check codes; personal area networks; wireless LAN; LDPC coded; LLR calculation approach; SC FDE systems; bit error rate; enhanced log likelihood ratio calculation; frequency 60 GHz; low density parity check codes; millimeter wave WLAN/WPAN; orthogonal frequency division multiplexing; single carrier frequency domain equalization; unique word tracking scheme; virtual channel; Bit error rate; Channel estimation; Computational complexity; Decoding; Noise; Parity check codes; Wireless personal area networks;
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2011 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-4244-8328-0
DOI :
10.1109/VETECF.2011.6093176
