Generalized Receive Quadrature Space Modulation Techniques: Hardware Models and Analysis

Abstract

Receive space modulation techniques (RSMTs) are a recently introduced family of hardware implementation multiple-input multiple-output (MIMO) models. RSMTs allow for efficient implementations at the receiver side where either a single or no radio frequency (RF) chain is required. Quadrature based RSMTs, in particular, allow for increasing the spectral efficiency by adding a quadrature dimension to the transmitted signal. Yet, the number of receive antennas in RSMTs must be a power of two integer. To relax this requirement, and allow for arbitrary number of receive antennas, generalized hardware implementation models for two quadrature based RSMTs are presented in this paper. Namely, Generalized Receive Quadrature Space Shift Keying (GRQSSK) and Generalized Receive Quadrature Spatial Modulation (GRQSM) are designed and analyzed. A comparative study is conducted to compare the bit error rate, cost, and power consumption when deploying such systems.