Antenna Selection In Spatial Modulation Systems

Spatial Modulation(SM) is a recently proposed multiple-input multiple-output(MIMO) transmission technique. In SM schemes, only one transmit antenna is active atone time instant so that the inter-channel interference (ICI) and inter-antennasynchronization (IAS) in conventional MIMO systems are efficiently avoided. As thetransmit antenna index carries additional information besides the conventional signalmodulation, the spectral efficiency is also enhanced in the SM system. Moreover,another advantage of SM is that it efficiently works in any configuration of transmit andreceive antennas. It has been shown that SM yields, with reduced computationalcomplexity, better performance than other conventional MIMO schemes such asV-BLAST and STBCs.For SM scheme, the maximum likelihood (ML) based detector makes anexhaustive search for the final result over the whole signal space, which results in theoptimal performance in terms of bit error rate (BER). However, if the channel stateinformation is known at the transmitter and/or receiver, in other words, if closed-loopSM is considered, it is possible to obtain better system performance than the MLperformance bound.This dissertation studies the antenna selection in spatial modulation systems:Chapter1introduces research significance and background of spatial modulation,and points out the main study contents of this dissertation.Chapter2discusses the transmission schemes for MIMO systems. the systemmodels are firstly introduced and then performance comparisons are given via thesimulation results.Chapter3studies the antenna selection for point-to-point spatial modulationsystems. Firstly, the basic system model for MIMO systems with antenna selection isintroduced and classic antenna selection algorithms are overviewed. Next, we discussthe transmit antenna selection for spatial modulation in particular and two transmit antenna selection methods are proposed. Then, a receive antenna selection algorithm isproposed to help the design of SM based single radio frequency (RF) MIMO systems.Lastly, simulation results demonstrate the validity of proposed methods.Chapter4studies the application of the SM concept in two-way relay networks.The system model of two-way relay networks is shown at first, which is followed by theproposal of SM-based decode-and-forward (DF) two-way relay transmission schemewith relay selection. Furthermore, two space-time shift keying (STSK), which can beviewed as generalization of SM concept, based DF two-way relay transmission schemesare developed to achieve the distributed transmission. Finally, the validity of proposedmethods is shown via the simulation results.Chapter5summarizes the whole article, and investigates the possible futuredirections in the study of SM systems.