Coordinate Interleaved Trellis Coded QPSK with T-Algorithm on Rayleigh Fading Channel

Hiroki NAKAMURA  Takaya YAMAZATO  Masaaki KATAYAMA  Akira OGAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E79-B    No.9    pp.1248-1255
Publication Date: 1996/09/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Personal Communications)
Category: Modulation, Equalization and interference cancellation technologies
Keyword: 
T-algorithm,  convolutional code,  coordinate interleaving,  fading channels,  

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Summary: 
In this paper, we evaluate the bit error rate (BER) performance of a coordinate interleaved trellis coded QPSK with T-algorithm. We employ a coordinate interleaving which breaks up burst errors, caused by fading, more effectively than symbol interleaving. We employ a rate-1/2 convolutional codes and the performance is evaluated on Rayleigh fading channels in terms of bit error rate (BER) by analysis and computer simulation. We consider using of the code which having a long effective code length (ECL). For this reason, we employ a decoder based on T-algorithm instead of Viterbi algorithm to avoid the complexity in the decoding. As the results, we achieve satisfactory BER performance with a slight computation in the decoding algorithm and the finite interleaving size.