Title :
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
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;
Conference_Titel :
Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th
Print_ISBN :
0-7803-7467-3
DOI :
10.1109/VETECF.2002.1040732
