Abstract
Receivers for the uplink of multiuser generalized spatial modulation MIMO systems
Highlights
I N the cellular communication system technologies, low-cost infrastructure and massive antenna devices are key features
Spatial modulation (SM)-based communication systems are envisioned as promising techniques due to: 1- the possibility of a striking reduction of the number of RF chains required at the transmitter, and 2- the potential spectral efficiency increase
spatial modulation (SM) is a multiple-input multipleoutput (MIMO) system that, at each transmission slot, the information is conveyed by the transmission of a symbol by a single antenna, and by the index associated to the antenna that emitted this symbol [1]
Summary
I N the cellular communication system technologies, low-cost infrastructure and massive antenna devices are key features. Given the scarcity of literature devoted to the uplink problem of GSM systems in a regular multiuser MIMO scenario, and, as optimal detection is infeasible due to prohibitive computational cost, this work presents several suboptimal receivers to be applied at the base station (BS) to retrieve the information sent by the users, and extends the work presented in [9]. The strategies presented are divided into two categories: a- when the BS jointly processes the data vector sent by all users at once, and b- when the BS first decouples the data belonging to different users and the applies detection techniques to retrieve the data vector of each user separately This receiver category is comprised of the pair decoupler/detector. Correspond to the expectation, to the binomial coefficient and to the floor operation, respectively
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