Successive MAP Detection with Soft Interference Cancellation for Iterative Receivers in Hierarchical M-ary QAM Systems 


Vol. 34,  No. 3, pp. 304-310, Mar.  2009


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  Abstract

This paper proposes a successive MAP (maximum a posteriori probability) detection scheme with SoIC(soft interference cancellation) to reduce the receiver complexity of hierarchical M-ary QAM system. For the successive MAP detection, modulation symbols generated from the other data streams are treated as Gaussian noise or eliminated as the soft interference according to their priorities. The log-likelihood ratio of the a posteriori probability (LAPRP) of each bit is calculated by the MAP detector with an adjusted noise variance in order to take the elimination and Gaussian assumption effect into account. By separating the detection process into the successive steps, the detection complexity is reduced to increase linearly with the number of bits per hierarchical M-ary QAM symbol. Simulation results show that the proposed detection provides a small performance degradation as compared to the optimal MAP detection.

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  Cite this article

[IEEE Style]

J. Kim and J. Seo, "Successive MAP Detection with Soft Interference Cancellation for Iterative Receivers in Hierarchical M-ary QAM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 304-310, 2009. DOI: .

[ACM Style]

Jongkyung Kim and Jongsoo Seo. 2009. Successive MAP Detection with Soft Interference Cancellation for Iterative Receivers in Hierarchical M-ary QAM Systems. The Journal of Korean Institute of Communications and Information Sciences, 34, 3, (2009), 304-310. DOI: .

[KICS Style]

Jongkyung Kim and Jongsoo Seo, "Successive MAP Detection with Soft Interference Cancellation for Iterative Receivers in Hierarchical M-ary QAM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 3, pp. 304-310, 3. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880