可射频拉远的多天线软件无线电系统设计

In general software radio platform, baseband analog signal acquisition module and baseband processing module are usually connected via a short-range and high-speed interfaces together, more use of non-network topology interface, so the number of antenna support is limited, and it is not convenient for multi-antenna extension implementation. In addition, due to the general data interface between the hardware card can't be transferred through a long-distance interference, thus it is unable to implement RRH(Remote Radio Head) and in building a base station network, which requires every baseband module must connect a baseband processing module, there is no doubt that it will increase the cost of the system. This paper proposes a design to solve above problems. In this design, Virtex-6 FPGA is the core of main control board and the Spartan-6 FPGA is the core of RF-baseband mixing acquisition board. Through PCI-E and Aurora high-speed serial interface, a multi-antenna software radio system platform that will support RRH and MIMO(Multiple-Input Multiple-Output) can be achieved based on the Linux operating system. As a high-performance multi-antenna software radio system platform, it can implement the communications systems research and verification of 4G-LTE algorithms upon a high-performance PC.