基于AD9361星载USB测控接收设备设计

Design of a Satellite-borne Unified S-Band Receiver Based on AD9361

针对星载统一S频段(Unified S-band,USB)测控应答机遥控接收高动态问题,提出了一种USB接收设备的设计方法。该方法基于AD9361+现场可编程逻辑门阵列(Field Programmable Gate Array,FPGA)硬件平台,采用并行+串行快速傅里叶变换(Fast Fourier Transform,FFT)实现信号载波频率捕获,载波环路使用2阶锁频环(Frequency Lock Loop,FLL)辅助3阶锁相环(Phase Lock Loop,PLL)环路进行跟踪,遥控副载波环路采用2阶PLL环进行跟踪。对方法的可行性进行了理论推导,使用Matlab进行仿真,结果表明该方法可以满足多普勒动态不小于32 kHz/s下遥控数据解调要求。

For the problem of high dynamic reception of remote control of satellite-borne unified S-band(USB)receiver,a USB receiver design scheme based on AD9361 and field programmable gate array(FPGA)hardware platform is proposed.Parallel and serial fast Fourier transform(FFT)is used to achieve signal carrier frequency acquisition.The carrier loop uses a second-order frequency lock loop(FLL)loop to assist a third-order phase lock loop(PLL)loop for tracking,and the remote control subcarrier loop uses a second-order PLL for tracking.The feasibility of the method is theoretically deduced and simulated with Matlab.The simulation results show that the method meets the requirements of remote control data demodulation under Doppler rate-of-change≥32 kHz/s.