Optimal low-complexity detection for space division multiple access wireless systems |
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Authors: | Wu Y. Cui T. Tellambura C. |
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Affiliation: | Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta., Canada; |
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Abstract: | A symbol detector for wireless systems using space division multiple access (SDMA) and orthogonal frequency division multiplexing (OFDM) is derived. The detector uses a sphere decoder (SD) and has much less computational complexity than the naive maximum likelihood (ML) detector. We also show how to detect non-constant modulus signals with constrained least squares (CLS) receiver, which is designed for constant modulus (unitary) signals. The new detector outperforms existing suboptimal detectors for both uncoded and coded systems. |
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