Matrix analysis and applied linear algebra
Matrix analysis and applied linear algebra
On maximum-likelihood detection and the search for the closest lattice point
IEEE Transactions on Information Theory
A simple transmit diversity technique for wireless communications
IEEE Journal on Selected Areas in Communications
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Error rate performance of the layered space-time code (LST) combined with Alamouti coding (AC) in flat Rayleigh fading channel is investigated. With the sorted-QR-decomposition-based decision feedback detector (SQRD-DFD), the channel matrix is Q-R decomposed with proper column permutation to minimize the possibility of error propagation. Error rate performance of the LST combined with AC is compared with that of the LST without AC with both sphere detector (SD) and SQRD-DFD. Simulation results show that in full-rank MIMO systems, when AC is introduced into LST, the error rate performance achievable with SQRD-DFD is very close to that obtainable with SD.