Doubly Ordered Sphere Decoding for Spatial Modulation

PROJECT TITLE :

Doubly Ordered Sphere Decoding for Spatial Modulation

ABSTRACT:

During this study, novel ordering algorithms of sphere decoding (SD) for spatial modulation (SM) are proposed to cut back the computational complexity. In the receive-ordering (Rx-ordering) scheme, the signals encountered at receive antennas are ordered to increase the probability of early termination during the search method. In distinction, the transmit-antenna indices and also the constellation points in the transmit-ordering (Tx-ordering) scheme are ordered on the basis of a suboptimal resolution, which is obtained from a subset of the received signals. To any cut back the computational complexity, the combined scheme of Rx-ordering and Tx-ordering is also presented. Simulation results show that SD aided by the proposed ordering schemes provides a substantial reduction within the computational complexity compared to existing SD algorithms in varied environments while achieving close to-optimal decoding performance.

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