We introduce a low-complexity decoder with near optimal performance for transmission over multi-antenna systems. By using lattice basis reduction for generating almost orthogonal channel matrix, we enhance the conditi...
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ISBN:
(纸本)9781479930838
We introduce a low-complexity decoder with near optimal performance for transmission over multi-antenna systems. By using lattice basis reduction for generating almost orthogonal channel matrix, we enhance the conditional decoding technique to implement a fast yet efficient decoder. The lattice reduction-aided conditional decoder is presented as a general detection technique over fading channels to yield significant savings in complexity while achieving close to Maximum Likelihood (ML) performance. We specifically apply the decoder for two practical schemes, uncodedmulti-inputmulti-output (MIMO) systems and the Golden code. By employing the orthogonality defect factor as a universal measure to select a near-orthogonal channel submatrix for conditional decoding, we implement an almost optimal decoder with linear complexity over quasi-static channels for the Golden code and the four-by-four uncoded MIMO system.
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