Correlation of PN Spread Spectrum Signal Under First-Order Dynamics

LI Chun-xia; WANG Fei-xue; GUO Gui-rong

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Correlation of PN Spread Spectrum Signal Under First-Order Dynamics

更新时间：2025-07-16

- Correlation of PN Spread Spectrum Signal Under First-Order Dynamics
- Acta Electronica Sinica Vol. 35, Issue 9, Pages: 1789-1793(2007)
- 作者机构：
  
  1. 国防科技大学电子科学工程学院卫星导航研发中心,湖南,长沙,410073
  2. 北京环球信息应用开发中心,北京,100094
  3. 国防科技大学电子科学工程学院卫星导航研发中心湖南长沙,410073
  4. 北京环球信息应用开发中心北京,100094
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN914.42
- Published：2007
- 稿件说明：
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LI Chun-xia, WANG Fei-xue, GUO Gui-rong. Correlation of PN Spread Spectrum Signal Under First-Order Dynamics[J]. Acta Electronica Sinica, 2007, 35(9): 1789-1793.
DOI：

LI Chun-xia, WANG Fei-xue, GUO Gui-rong. Correlation of PN Spread Spectrum Signal Under First-Order Dynamics[J]. Acta Electronica Sinica, 2007, 35(9): 1789-1793. DOI：

摘要

在直接序列扩频系统中

受收发两端的相对运动和时钟频率不稳定等因素的影响

接收伪码和本地伪码之间会存在一定的码率偏移.本文首次采用对常规伪码相关函积分的方法推导了一阶动态即恒定码率偏移条件下任意长积分时间伪随机码信号相关函数公式

对所得公式进行了仿真验证

在此基础上分析了一阶动态条件下伪随机码信号相关函数的特征

包括主瓣展宽、峰值移位和损耗等现象.本文结论为高动态接收机伪码同步技术提供了理论基础.

Abstract

In direct sequence spread spectrum systems

due to dynamic factors such as the relative motion between the transmitter and the receiver and the instability of clock

there is code-frequency offset between the received and the local PN codes.In this paper

assuming first-order dynamic

namely

constant code-frequency offset

the formulas for the correlation function of PN code are derived for the first time by the method of integrating the normal PN code correlation function with an integration time interval of arbitrary length and then verified by simulation.Accordingly the characteristics of PN code correlation function under first-order dynamic are studied

including spread of main-lobe

shift and loss of peak.The conclusions drawn in this paper can guide the design of code synchronization in high dynamic receiver.

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