Design And Implementation Of Software Radio Transceiver Based On AD9361

With the development of the society,the software radio technology has been paid more and more attention,and the application is becoming more and more widely.It has the figure of software radio,whether in UAV,vehicle monitoring system or in military or civil radio stations.Software radio is the feature of software programmable and open.It realizes the communication between different hardware communication devices through software programming,and solves the problem of the coexistence of the radio platform system and cannot communicate with each other.This is of great significance to the development of wireless communication.In order to solve the problem of simple function and poor expansibility of traditional radio transceiver.In this paper,the main functions and performance indexes of the software radio transceiver are determined by analyzing the structure of the software radio system and based on the zero medium band pass sampling software radio structure.According to the function and performance index,the MMSE equalization algorithm is used to reduce the signal peak to average ratio(PAPR)and the sensitivity to phase noise,and enhance the ability to resist multipath interference.Design the overall structure of the software radio transceiver.The software radio structure mainly includes radio frequency module and digital baseband processing module.The RF module selects AD9361,and designs and implements data interface,internal registers,transceiver and other functions.Based on ZC706 development board,MATLAg and ModelSim simulation software,the digital baseband module designs and implements the core functions of RS compiling and decoding,16QAM modulation and demodulation,packet detection,frame synchronization,channel estimation,frequency domain equalization and so on.Based on AD9361 and ZC706,the RF and digital baseband modules are tested.The transmission center frequency is 1.435GHz,the bandwidth is 20MHz,the received signalspectrum and the transmitted signal spectrum overlap,that is,the main receiving index is the same as the main transmission index.The test results show that the designed AD9361 software radio transceiver has a reasonable structure,the performance targets meet the design requirements,and the core function of the transceiver is realized.