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http://dx.doi.org/10.3745/KIPSTC.2006.13C.1.075

A Half-Rate Space-Frequency Coded OFDM with Dual Viterbi Decoder  

Kang Seog-Geun (경상대학교 전기전자공학부)
Publication Information
The KIPS Transactions:PartC / v.13C, no.1, 2006 , pp. 75-82 More about this Journal
Abstract
In this paper, a space-frequency coded orthogonal frequency division multiplexing (SFC-OFDM) scheme with dual Viterbi decoder is proposed and analyzed. Here, two independent half-rate OFDM symbols are generated after convolutional coding of the binary source code. A dual Viterbi decoder is exploited to decode the demodulated sequences independently in the receiver, and their path metrics are compared. Accordingly, the recovered binary data in the proposed scheme are composed of the combination of the sequences having larger path metrics while those in a conventional system are simply the output of single Viterbi decoder. As a result, the proposed SFC-OFDM scheme has a better performance than the conventional one for all signal-to-noise power ratio.
Keywords
Orthogonal Frequency Division Multiplexing (OFDM); Space-frequency Coding(SFC); Viterbi; Wireless Communication System;
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