Optimum and sub-optimum Decoding Methods of Space-Time Trellis Coded Code Division Multiple Access Systems in Multipath Fading Channels 


Vol. 27,  No. 12, pp. 1088-1095, Dec.  2002


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  Abstract

The space-time equalizer has been used to enhance the space time code in the multipath fading channel. However it requires higher receive complexity. We present the space-time trellis coded code division multiple access system (SITC CDMA) and propose the optimum and sub-optimum decoding methods of this system in multipath fading channels. In the receiver, the principal ratio combining (PRC) maximizes the received signal to interference and noise ratio (SINR) by mutipath combining and reduces the complexity of the system. Then, combined signals are decoded by maximum likelihood (ML) decoding. According to the combining and decoding methods, there are four decoding methods. There are optimum ML decoding without combining, adding multipath signals in each receive antenna before decoding, combining multipath signals in each antenna before decoding, and combining all received signals before decoding. The receive performance of these methods is proportional to complexity. Also, the combining multipath signals in each antenna before decoding can achieve the performance comparable to that of the optimum ML decoding without combining, while reducing the complexity of the receiver.

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  Cite this article

[IEEE Style]

Y. M. Ki, E. J. Yim, B. H. Chung, D. K. Kim, "Optimum and sub-optimum Decoding Methods of Space-Time Trellis Coded Code Division Multiple Access Systems in Multipath Fading Channels," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 12, pp. 1088-1095, 2002. DOI: .

[ACM Style]

Young Min Ki, Eun Jeong Yim, Bo Hun Chung, and Dong Ku Kim. 2002. Optimum and sub-optimum Decoding Methods of Space-Time Trellis Coded Code Division Multiple Access Systems in Multipath Fading Channels. The Journal of Korean Institute of Communications and Information Sciences, 27, 12, (2002), 1088-1095. DOI: .

[KICS Style]

Young Min Ki, Eun Jeong Yim, Bo Hun Chung, Dong Ku Kim, "Optimum and sub-optimum Decoding Methods of Space-Time Trellis Coded Code Division Multiple Access Systems in Multipath Fading Channels," The Journal of Korean Institute of Communications and Information Sciences, vol. 27, no. 12, pp. 1088-1095, 12. 2002.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880