DocumentCode :
111820
Title :
Doubly Ordered Sphere Decoding for Spatial Modulation
Author :
Kyungchun Lee
Author_Institution :
Dept. of Electr. & Inf. Eng., Seoul Nat. Univ. of Sci. & Technol., Seoul, South Korea
Volume :
19
Issue :
5
fYear :
2015
fDate :
May-15
Firstpage :
795
Lastpage :
798
Abstract :
In this study, novel ordering algorithms of sphere decoding (SD) for spatial modulation (SM) are proposed to reduce 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 process. In contrast, the transmit-antenna indices and the constellation points in the transmit-ordering (Tx-ordering) scheme are ordered on the basis of a suboptimal solution, which is obtained from a subset of the received signals. To further reduce 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 in the computational complexity compared to existing SD algorithms in various environments while achieving near-optimal decoding performance.
Keywords :
computational complexity; decoding; modulation; probability; receiving antennas; signal processing; transmitting antennas; Rx-ordering scheme; Tx-ordering scheme; computational complexity reduction; constellation points; doubly ordered sphere decoding; early termination probability; near-optimal decoding performance; receive antennas; receive-ordering scheme; search process; spatial modulation; transmit-antenna indices; transmit-ordering scheme; Computational complexity; Decoding; Modulation; Receiving antennas; Transmitting antennas; MIMO; Spatial modulation; sphere decoding;
fLanguage :
English
Journal_Title :
Communications Letters, IEEE
Publisher :
ieee
ISSN :
1089-7798
Type :
jour
DOI :
10.1109/LCOMM.2015.2415808
Filename :
7065216
Link To Document :
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