高动态低载噪比的载波捕获技术研究

对高动态、低载噪比信号的载波捕获是航天测控的关键技术之一。对三种自适应谱线增强算法进行介绍,并将基于自适应谱线增强算法的FFT捕获方法与直接FFT谱分析方法进行仿真对比及工程实现,仿真结果和测试数据表明该方法能够实现高动态、弱信号的载波捕获。

Research on Carrier Acquisition Technique for High-Dynamic Low-CNR Signals

The acquisition of high-dynamic low-CNR signals is one of the most important problems in the deep space exploration.Based on three existing adaptive line enhancer(ALE) algorithms and architectures for carrier acquisition,a new FFT algorithm is proposed and compared with the common FFT algorithm in this paper.Simulation results and test data show that this algorithm can complete the carrier acquisition of high-dynamic low-CNR signals.