Spatial Modulation for 5G Systems
5th-generation (5G) wireless systems, which are set for commercial use sometime around 2020, are expected to provide new types of enhanced user connectivity services, in terms of providing very high data rates, increased capacity, improved security, higher reliability, reduced latency, increased quality of service and availability, and energy efficiency (EE). Multiple-input multiple-output (MIMO) systems, incorporating multiple antennas at the transmitter and/or receiver, constitute a key technology for the design of current (4G) and future (5G) wireless communications systems. This chapter presents the basic working principles for spatial modulation (SM) MIMO. The basic idea of SM is to map a block of information bits into two information carrying units, namely a symbol that is chosen from a complex signal-constellation diagram and a unique transmit-antenna index that is chosen from the set of transmit-antenna in the antenna array. The chapter then discusses the various transmission techniques for SM-MIMO.