The Design And Implementation Of Software Defined Radio Hardware Platform Based On Massive MIMO

Massive MIMO technology can make full use of space resources and improve spectrum utilization.Researchers expect to use massive MIMO technology to solve the problems in CRAHNs networks.However,the combination of massive MIMO technology and CRAHNs networks faces many challenges.In addition to theoretical issues such as resource allocation and beamforming,a suitable hardware platform is needed to provide a test platform for these studies.This paper focuses on the design and implementation of a software radio hardware test platform.Firstly,this paper summarizes the CRAHNs network and Massive MIMO technology.The advantages and challenges of Massive MIMO CRAHNs network formed by introducing Massive MIMO technology into CRAHNs network are briefly described.It is proposed that in addition to theoretical research and analysis,the actual test platform is required to provide a test environment.Subsequently,the test platform equipment currently used by domestic and foreign counterparts and the scheme used to build the test platform were studied.Combined with the needs of the subject,a suitable software radio hardware platform was proposed.Secondly,this paper investigates and summarizes software radio technology and implementation solutions.The scope and technical difficulties of different RF transceiver technologies are analyzed,and the technical characteristics of the existing software radio development platform are analyzed.Based on the workstation-based software radio hardware platform structure of the zero-IF transceiver,and combining the needs of the subject,a suitable hardware solution framework was designed.Thirdly,according to the design and the needs of the project,build the 2X2 MIMO software radio hardware platform with ADI AD9361 RF transceiver chip and Xilinx SPARTAN-6 FPGA chip as the core device.The software radio hardware test platform is mainly divided into three main parts: a radio frequency module,a signal interface module,and a clock signal module.Perform single-module testing and comprehensive path testing on the built-in software radio hardware platform.These tests verify the correctness of the design of the 2X2 MIMO software radio hardware platform.Finally,a design scheme for extending the 2X2 MIMO hardware platform to the 8X8 MIMO hardware platform is proposed.It focuses on the clock modules needed to build 8X8 MIMO and how to solve the frequency phase synchronization scheme.