Research on IF Signal Sampling Directly and Digital Coherent Detection

Wu Yuanbin; Li Jingwen

您当前的位置：

首页 >

文章列表页 >

Research on IF Signal Sampling Directly and Digital Coherent Detection

更新时间：2025-12-08

- Research on IF Signal Sampling Directly and Digital Coherent Detection
- Acta Electronica Sinica Issue 10, (1994)
- 作者机构：
  
  南京电子技术研究所
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN763.1
- Published：1994
- 稿件说明：
移动端阅览
[1]吴远斌,李景文.直接中频采样及数字相干检波的研究[J].电子学报,1994(10):105-107.

Wu Yuanbin, Li Jingwen. Research on IF Signal Sampling Directly and Digital Coherent Detection[J]. Acta Electronica Sinica, 1994, (10).
[1]吴远斌,李景文.直接中频采样及数字相干检波的研究[J].电子学报,1994(10):105-107. DOI：

Wu Yuanbin, Li Jingwen. Research on IF Signal Sampling Directly and Digital Coherent Detection[J]. Acta Electronica Sinica, 1994, (10). DOI：

摘要

在许多雷达、声纳和通信系统中，一般都需要将接收机的中频输出信号变换为正交的两路基带信号，即采用正交Ｉ、Ｑ通道处理来进行检波，但传统的正交Ｉ、Ｑ通道，由于两路模拟元器件本身不可能做到完全一致，致使两路的正交误差大（２～３°），幅度一致性差（０．５ｄＢ），大大限制了系统整机性能的提高。本文提出了一种新的正交相干检波方法，即直接在中频对信号进行Ａ／Ｄ变换，然后利用数字信号处理的办法进行相干检波，得到正交的两路基带信号，大大提高了检波性能及其效率。文中给出了电原理图及实验结果。

Abstract

In many radar

sonar and communication systems

the coherent detectors of the receivers are generally implemented in the form of two parallel basehand channels which form in-phase（I） and quadrature （Q）components of received IF signal.With traditional I andQ channels

the imperfect matching of these separate channels results in high phases errors（2～3°）and amplitude errors（o. 5dB）.These factors greatly limit the system performance.This paper provides a new method by sampling the IF signal directly and detecting by way of DSP（digital signal processing）.This approach provides improved accuracy.This paper also provides a basic hardware scheme and a typical result.

关键词

Keywords

references

Views

512

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Mixer-Free All Digital Quadrature Demodulation Based on Second-Order Sampling

Research on the Lower Limits of Power-Law-Integral for Estimating Jitter of the High-Stability Clocks

Related Author

王飞雪

郭桂蓉

CAO Peng

WANG Ming-fei

FEI Yuan-chun

ZENG Tao

LONG Teng

MAO Er-ke

Related Institution

ATR Lab., National University of Defense Technology

410073

School of Information and Mechanical Engineering,Beijing Institute of Graphic Communication

School of Information and Electronic, Beijing Institute of Technology

School of Information and Mechanical EngineeringBeijing Institute of Graphic CommunicationBeijing 102600China

⁰