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Transmit Precoding for Receive Spatial Modulation Using Imperfect Channel Knowledge

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Original languageUndefined/Unknown
Title of host publicationGreeNet Workshop of the Vehicular Technology Conference (VTC Spring)
Place of PublicationYokohama, Japan
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Publication statusPublished - 1 May 2012

Abstract

Abstract—In this paper, motivated by the relatively new concept of Spatial Modulation (SM), we are addressing the problem of Receive-Spatial Modulation (R-SM) under two cases of imperfect channel knowledge at the transmitter side. In the first case, we adopt a statistical model for the channel uncertainties, whereas in the second one a worst-case approach is followed and the channel uncertainties are expressed as a bounded set. Based on Zero-Forcing (ZF) precoding and using standard tools from optimization theory, we derive closed form solutions that turn out to be robust. Simulation results show that the proposed schemes have a performance close to the perfect channel knowledge scenario in low and mid-low SNRs. Furthermore, these designs can be applied to wide range of channels with different correlation states combined with a transmit power gain.

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