A space-time coded OFDM with dual Viterbi decoder

Author

Kang, Seog Geun ; Ko, Chi Chung

Author_Institution

Dept. of Electr. & Comput. Eng., Nat. Univ. of Singapore, Singapore

Volume

2

fYear

2002

fDate

2002

Firstpage

908

Abstract

In this paper, a space-time coded orthogonal frequency division multiplexing (STC-OFDM) scheme with dual Viterbi decoder is proposed and analyzed. In this scheme, two independent half-rate OFDM symbols are generated after convolutional coding. A dual Viterbi decoder is used for the independent decoding of the recovered sequence, and their path metrics are compared. Accordingly, the recovered binary data is a combination of the sequences which have larger path metrics. The proposed STC-OFDM scheme has better performance than the conventional one for all signal-to-noise ratios.

Keywords

OFDM modulation; Viterbi decoding; convolutional codes; sequential decoding; space-time codes; STC-OFDM; convolutional coding; dual Viterbi decoder; half-rate OFDM symbols; independent decoding; orthogonal frequency division multiplexing; path metrics; performance; recovered sequence; signal-to-noise ratios; space-time code; Convolution; Convolutional codes; Decoding; Diversity reception; Intersymbol interference; OFDM; Transmitters; Transmitting antennas; Viterbi algorithm; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th

ISSN

1090-3038

Print_ISBN

0-7803-7467-3

Type

conf

DOI

10.1109/VETECF.2002.1040732

Filename

1040732