A Reduced-PAR Opportunistic STBC Scheme for Frequency-Selective Channels in the Presence of Frequency Offset

Author

Wang, Dandan ; Minn, Hlaing ; Al-Dhahir, Naofal

Author_Institution

Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX

Volume

7

Issue

8

fYear

2008

fDate

8/1/2008 12:00:00 AM

Firstpage

2871

Lastpage

2876

Abstract

Opportunistic space-time block codes (STBC) have been investigated for flat-fading channels in the literature. In this paper, we present a novel scheme for integrating them with orthogonal frequency division multiplexing (OFDM) for frequency-selective channels with an unequal error protection capability making it attractive for multimedia and multicasting applications. In addition, our new scheme optimizes the tradeoff between coding gain and peak-to-average ratio (PAR) while minimizing inter-carrier interference in the presence of carrier frequency offset. We show that our scheme achieves a 2 dB reduction in PAR over the conventional scheme.

Keywords

OFDM modulation; block codes; fading channels; intercarrier interference; multicast communication; multimedia communication; space-time codes; OFDM; flat-fading channels; frequency offset; frequency selective channels; intercarrier interference minimization; multicasting applications; multimedia applications; orthogonal frequency division multiplexing; peak-to-average ratio; reduced-PAR opportunistic STBC scheme; space-time block codes; Block codes; Communication switching; Decoding; Error correction codes; Frequency diversity; Interference; OFDM; Peak to average power ratio; Switches; Transmitting antennas; ICI; OFDM; PAR; STBC;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2008.070200

Filename

4600196