MIMO Fading Emulator Development with FPGA and Its Application to Performance Evaluation of Mobile Radio Systems

Abstract

We present four new developments for a multiple-input multiple-output (MIMO) over-the-air measurement system based on our previous studies. The first two developments relate to the channel model for multipath environment generation. One is a further simplification of the circuit configuration without performance degradation by reducing the number of delay generation units, which dominate the performance limit when implementing the circuit on a field-programmable gate array (FPGA). The other is to realize spatial correlation characteristics among the input ports on the transmission side, whereas the previously proposed channel model did not consider this correlation. The third development involves the details of implementing the MIMO fading emulator on an FPGA as a two-stage scheme. The fourth is the demonstration of application examples of the developed system.

A Triply Selective MIMO Channel Simulator Using GPUs

“…However, even though many GPUbased implementations have been reported in the state of the art, a complete triply selective fading channel simulator has not been reported in the open literature. Examples of complete MIMO fading channel simulators and emulators can be found in [15][16][17], but these architectures do not exploit the triple selectivity at the same time, or they configure the hardware with a low number of antennas. This paper presents a triply selective MIMO channel simulation methodology using GPU techniques; the methodology will be based on SISO channel generators presented in [9].…”