频率精确测量方法研究

Research on the Precision Method of Freuqency Measurement

介绍了几种常见的谱线频率测量方法 ,重点分析了测量频率的相位差法所存在的相位模糊问题 ,提出了一种具有相位模糊修正的谱线频率精确测量方法 ,详细给出了FFT法、相差法和相位模糊修正法的计算机仿真结果 。

Several important ways to measure signal frequency are given. The phase ambiguity, which is existed in the phase-bias method is studied in detail. A modified precisely measuring method being capability of phase ambiguity elimination, is then proposed. The simulation results using three kinds of techniques, i.e. FFT method, original phase bias method, and the modified phase bias method, are also particularly given. Finally some conclusions are made according to the results. [