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为了实现对深空探测器发射的DOR信号的射电干涉测量,可以采用单站接收信号与本地模型信号进行本地相关处理的方法,提取DOR信号的幅度和相位。本文考察了一种基于线性相位模型计算的快速DOR信号提取算法,采用并行编程技术,开发了算法验证软件。利用该软件对嫦娥二号DOR数据的处理结果表明,在4核普通商用计算机上可实现单站32 Mb/s数据的实时处理,0.5 s积分时间内DOR信号相位精度可达到2°左右,频率精度约为20 mHz。
In order to realize the radio interference measurement of the DOR signal transmitted by the deep space probe, a method of locally correlating the single received signal and the local model signal may be adopted to extract the amplitude and the phase of the DOR signal. This paper examines a fast DOR signal extraction algorithm based on linear phase model calculation, using parallel programming technology, the algorithm validation software was developed. The results of DOR data processing of Chang’e II using the software show that the real-time processing of single-station 32 Mb / s data can be realized on a 4-core common commercial computer, and the phase accuracy of DOR signal can reach about 2 ° in 0.5 s integration time. The accuracy is about 20 mHz.