【摘要】 介绍了基于dsPIC的测试系统的结构,以及对移频信号进行测试的原理和算法。采用同时从时域和频域两个分析域着手的方法,避开了利用频谱幅值求取频偏进而获得上下边频的方法,并且运用频谱细化技术,提高了运算处理的速度以及频率测试精度。文中给出了简洁实用的算法。试验结果表明,该方法能够对移频信号进行准确快速的测量。更多还原

【Abstract】 The structure of the testing system based on dsPIC processer and the princ-eple and algorithm for Frequency-shift signal were introduced.Time Domain and Freque-ncy Domain are analysed Simultaneous,it has better effects in improving processing speed and the accuracy of the frequency test by obtaining the side frequency no using Frequency Offset by using spectrum amplitudes,and by using Zoom spectrum.In this pap-er,a simple and practical Algorithm is presented.Actual test shows that the method can measure the frequency of frequency-shift signal precisely and fastly.更多还原