The Design And Implemention On A System Platform Based On ZERO-IF For MIMO-SCFDE Systems

With the advent of the mobile multimedia era,wireless communication systems have been more and more widely used,and the performance requirements for wireless communication systems are becoming higher and higher.Multi-input and Multi-output technologies make full use of space resources and utilize space multiplexing technologies and space Diversity techniques improve the bandwidth utilization of wireless communication systems.However,the single-carrier frequency-domain equalization technique has been widely used for its typical performance against typical problems of mobile communication systems such as multipath effects.Based on the theory of software radio,this platform aims to design a universal hardware platform for MIMO-SCFDE system and reduce the cost and volume of the RF part by using the zero-IF architecture technology currently under research.Commonality,complex algorithm tolerance,low power triple design principles of the hardware platform system.The platform is mainly divided into four modules in accordance with the modular idea of a detailed design and implementation,respectively,is the core algorithm processing module,high-performance clock management module,auxiliary core control module,transceiver link module.Each module has been fully selected and the principle of learning to complete the design work,and from the perspective of the communication system developers,based on the Virtex-6 FPGA chip multi-mode switching method used in conjunction with the dual communication link switching,Auxiliary Control System’s multi-event response service model is used to handle user needs such as clock switching.In addition,in order to compare the link-level signal quality between IF architecture and zero-IF architecture,this platform compatible design of two sets of transceiver link,respectively,designed based on AD9125 and ADS62C15 IF transceiver link and based on AD9361 zero IF transceiver chain Road,designed and implemented in the FPGA end of the two kinds of communication link baseband signal interface and IF demodulation processing interface,designed and implemented in the auxiliary control module of two sets of transceiver link instant switching functions,convenient platform Developers to achieve two sets of transceiver link comparison and testing.After the design was completed,the platform was fully link-level testing and signal quality analysis,but also equipped with a laboratory project "ultra-low signal to noise ratio MIMO-SCFDE point-to-point communication system design and implementation" The full verification and testing proves the rationality and reliability of the MIMO-SCFDE system platform based on zero-IF architecture designed in this paper.