论文部分内容阅读
针对高灵敏度深空应答机的载波捕获,研究了一种快速解线调载波捕获算法。分析了算法的原理和实现方案。仿真和FPGA实现结果表明:该算法可准确捕获信噪比极低和多普勒动态范围极大的信号。针对算法的实际应用,给出了算法在不同工作模式下的参数设置,并对其资源占用、捕获时间和检测概率进行了计算,进一步说明了算法的工程可实现性。
Aiming at the carrier capture of high-sensitivity deep space transponder, a fast demodulation algorithm of carrier wave is studied. The principle and implementation of the algorithm are analyzed. Simulation and FPGA implementation results show that the algorithm can accurately capture signals with extremely low signal-to-noise ratio and great Doppler dynamic range. According to the practical application of the algorithm, the parameter setting of the algorithm in different working modes is given, and the resource occupancy, the acquisition time and the detection probability are calculated, further illustrating the engineering feasibility of the algorithm.