脉冲调制信号相位噪声测量中的功率谱估计方法

doi:10.3969/j.issn.1001-2400.2012.04.025

J4 ›› 2012, Vol. 39 ›› Issue (4): 138-143.doi: 10.3969/j.issn.1001-2400.2012.04.025

脉冲调制信号相位噪声测量中的功率谱估计方法

陈晓龙;王家礼;孙璐;冯丹

(西安电子科技大学机电工程学院，陕西西安 710071)

收稿日期:2012-03-06 出版日期:2012-08-20 发布日期:2012-10-08
通讯作者: 陈晓龙
作者简介:陈晓龙(1976-)，男，副教授，西安电子科技大学博士研究生，E-mail: xlchen@mail.xidian.edu.cn．
基金资助:
中央高校基本科研业务费专项资金资助项目(K50510040011, K50511040009)

Method for estimating power spectral density in pulsed carrier phase noise measurements

CHEN Xiaolong;WANG Jiali;SUN Lu;FENG Dan

(School of Mechano-electronic Engineering, Xidian Univ., Xi'an 710071， China)

Received:2012-03-06 Online:2012-08-20 Published:2012-10-08
Contact: CHEN Xiaolong

摘要/Abstract

摘要：

针对脉冲调制信号相位噪声测量中的噪声功率谱估计问题，建立了信号相位噪声的数学模型，分析了信号相位噪声与噪声功率谱之间的关系，提出了一种基于Welch法的噪声谱估计方法．该方法依据被测信号脉冲调制参数选择Welch法的数据分段和窗函数长度．仿真实验结果表明，该方法较传统的快速傅里叶变换方法或自相关法具有更好的谱估计性能．

关键词: 脉冲调制信号, 相位噪声, 功率谱密度, Welch法

Abstract:

To improve the performance of power spectral density estimation used in pulsed carrier phase noise measurement, the mathematical model of phase noise is established, the relation between phase noise and power spectrum of noise is analyzed, and a power spectral density estimation method based on the Welch method is developed. According to this method, the scheme for the data segment and the length of the window function are determined by the pulsed modulation parameter of the measured signal. Simulation results show that the proposed method has better performance on spectrum estimation than the existing ones.

Key words: pulsed carrier signal, phase noise, power spectral density, Welch method

中图分类号:

TN98

陈晓龙;王家礼;孙璐;冯丹. 脉冲调制信号相位噪声测量中的功率谱估计方法[J]. J4, 2012, 39(4): 138-143.

CHEN Xiaolong;WANG Jiali;SUN Lu;FENG Dan. Method for estimating power spectral density in pulsed carrier phase noise measurements[J]. J4, 2012, 39(4): 138-143.

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脉冲调制信号相位噪声测量中的功率谱估计方法

Method for estimating power spectral density in pulsed carrier phase noise measurements

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