The Performance of Sphere Decoders for Iterative Spatial Multiplexing MIMO receiver
Date
2008
Authors
Zhao, Ming
Shi, Zhenning
Reed, Mark
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Institute of Electrical and Electronics Engineers (IEEE Inc)
Abstract
Pohst and Schnorr-Euchner (SE) are two popular sphere decoders (SD) to perform near maximum likelihood (ML) detection in Spatial Multiplexing multiple-input-multiple-output (MIMO) system. Recent work [1] showed Pohst and SE are two variants of the well known stack sequential decoding and proposed modification to each strategy to shown significant complexity reduction but with near ML performance. This paper proposed modified Pohst and SE algorithms by taking into account the a priori information to estimate the maximum a posteriori (MAP) probability of the received symbol sequence. Simulation results show that significant performance gain can be achieved from iterative MAP approach and complexity reduction can be obtained for SE enumeration strategy with minor performance loss compared to Phost enumeration algorithm.
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Keywords
Keywords: Block codes; Codes (symbols); Conformal mapping; Decoding; Maximum likelihood; MIM devices; Spheres; Spontaneous emission; Turbo codes; A posteriori; Complexity reductions; Enumeration algorithms; MAP approaches; Mimo receivers; Performance gains; Perform
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Proceedings of 5th International Symposium on Turbo Codes and Related Topics (Turbo-Coding-2008)
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Conference paper
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2037-12-31
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