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

fYear

2011

fDate

5-8 Sept. 2011

Firstpage

1

Lastpage

5

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Fall), 2011 IEEE

Conference_Location

San Francisco, CA

ISSN

1090-3038

Print_ISBN

978-1-4244-8328-0

Type

conf

DOI

10.1109/VETECF.2011.6093176

Filename

6093176