| 摘要: |
| 论述了扩频无线电信号侦收和测向等应用领域中，在多通道天线和接收机后端采用数
字处理手段，在低信噪比下实现多通道相位差精确提取的方法。阐
述了多通道相位差提取的基本工程模型、中频信号采样处理方法、普通ASK调制信号的相位
差提取方法，以及BPSK调制的扩频信号的相位差提取方法，给出了基于MATLAB7.0.1平台的
仿真图形和结果。该技术已在工程中成功实现。 |
| 关键词: 扩频系统 多通道天线 相位差测量 数字中频 |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目: |
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| Multi-Channel Phase Difference Measurement Based on Spread Spectrum System |
| WANG Ya-tao |
| (Southwest China Institute of Electronic Technology, Chengdu 610036, China) |
| Abstract: |
| The method of acquiring the phase difference of multi-channel in case
of low SNR(Signal-to-Noise Ratio) is discussed，by means of using digital proces
sing technique at the back-end of RF antenna and receiver. The method can usuall
y be used in some applications, such as wireless signal detecting or direction m
easurement. The basic engineering model of multi-channel phase measurement is de
scribed as well as the process of A/D sampling on intermediate frequency(IF), th
e method of acquiring phase difference on ASK modulated signal ,and the method o
f acquiring phase difference on BPSK modulated spread spectrum signal.Simulation
based on Matlab7.0.1 is provided.The technique discussed in this paper has been
successfully applied in project. |
| Key words: spread spectrum system multi-channel antenna phase difference measurement digital IF |
