Massive MIMO has become a core technology for the next generation of wireless communications, and non-linear group decoding schemes can achieve better spectral energy efficiency, which in turn leads to higher data rates, especially with assistance non-orthogonal frequency multiple access (NOMA). The purpose this paper is study problems formulating performance such systems. In particular, paper,...

Abstract—In this paper, we study the achievable rate region of Gaussian multiuser channels with the messages transmitted being from finite input alphabets and the outputs being quantized at the receiver. In particular, we focus on the achievable rate region of i) Gaussian broadcast channel (GBC) and ii) Gaussian multiple access channel (GMAC). First, we study the achievable rate region of two-u...

Consider a distributed control problem with a communication channel connecting the observer of a linear stochastic system to the controller. The goal of the controller is to minimize a quadratic cost function in the state variables and control signal, known as the linear quadratic regulator (LQR). We study the fundamental tradeoff between the communication rate r bits/sec and the limsup of the ...