A dual QPSK soft-demapper for multiband OFDM exploiting time-domain spreading and guard interval diversity

Author

Sherratt, R. Simon ; Yang, Runfeng

Author_Institution

Lab. of Signal Process., Reading Univ.

Volume

53

Issue

1

fYear

2007

fDate

2/1/2007 12:00:00 AM

Firstpage

46

Lastpage

49

Abstract

When considering the relative fast processing speeds and low power requirements for wireless personal area networks (WPAN) including wireless universal serial bus (WUSB) consumer based products, then the efficiency and cost effectiveness of these products become paramount. This paper presents an improved soft-output QPSK demapper suitable for the products above that not only exploits time diversity and guard carrier diversity, but also merges the demapping and symbol combining functions together to minimize CPU cycles, or memory access dependant upon the chosen implementation architecture. The proposed demapper is presented in the context of multiband OFDM version of ultra wideband (UWB) (ECMA-368) as the chosen physical implementation for high-rate wireless USB.

Keywords

OFDM modulation; personal area networks; quadrature phase shift keying; system buses; ultra wideband communication; UWB system; WPAN; dual QPSK soft-demapper; guard carrier diversity; guard interval diversity; multiband OFDM; orthogonal frequency division multiplexing; quadrature phase shift keying; time diversity; time-domain spreading; ultra wideband system; wireless personal area networks; wireless universal serial bus consumer based products; Diversity reception; FCC; Media Access Protocol; Multimedia communication; OFDM; Proposals; Quadrature phase shift keying; Time domain analysis; Ultra wideband technology; Universal Serial Bus;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/TCE.2007.339500

Filename

4140897