一种射频信号测量的频谱分析及仿真

Radio frequency signal spectrum analysis and simulation

介绍了一种射频信号测量和频谱分析过程中误差的成因及减小误差的主要方法。在信号测量过程中由于测量环境和条件不同,测量的要求不同,测试者对测量方法的理解不同,得到的测量结果存在偏差。对得到的连续信号进行时域采样并截取以得到有限长的离散序列,利用计算机DFT实现信号频谱分析,通过与理论值的对比,发现了测量及分析过程中产生的各种干扰及误差,对其进行了分析及提出修正办法,进行了基于MATLAB环境下的仿真效果。

This paper describes the causes of errors in an RF signal measurement ＆ spectrum analysis process and a method of reducing errors.In the signal measurement process as the environmental,conditions,measurement methods,the measure requirements and the testers＇ comprehension are all different,the measurement results obtained are different.Sampling the continuous signal obtained in time domain and intercepting it to obtain a discrete sequence of finite length,then using computer DFT signal spectrum analysis and comparing with the theoretical value,we get kinds of interference and error analysis in the measurement＆ analysis process.We analysis and propose amendments to approach and simulation the results based on MATLAB environment.