摘要鉴相器，就是能够鉴别出输入信号的相差的器件，使输出电压与两个输入信号之间的相位差有确定关系，是一个具有抽样性质的电路。鉴相器是锁相环的基本部件之一，也用于调频和调相信号的解调。常见的鉴相特性有余弦型、锯齿型与三角型等。鉴相器可以分为模拟鉴相器和数字鉴相器两种。原始的鉴相器采用模拟I/Q电路实现，随着数字电路技术的发展，模拟鉴相器的功能可以用数字技术完成，因此鉴相器技术也可以通过高速采样后，在数字电路中实现。数字鉴相器具有调试方便，实现简单等优点。首先基于matlab进行模拟I/Q电路的理论验证，并进行了误差分析；进而运用数字方法完成采样和I/Q鉴相；最后将数字I/Q鉴相方法应用于CCS，使用DSP芯片TMS320F2812进行了编程及调试，达到了鉴相目的。从基本理论和软件仿真的层面，分别介绍设计流程和调试过程。65550

毕业论文关键词   鉴相器 I/Q鉴相方法  信号采样  TMS320F2812芯片

毕业设计说明书（论文）外文摘要

Title   The Research of Digital I / Q Phase Detector Technology                         

Abstract

The phase detector is able to identify the phase difference of the input signal of the device, the output voltage and the phase difference between two input signals has a definite relationship between the nature of a circuit with a sample. The phase locked loop is one of the basic components, and the phase-modulated signal is also used for FM demodulation. Common characteristics cosine phase, serrated and triangular type. Phase can be pided into analog phase detector and the digital phase detector two kinds. The original phase uses analog I / Q circuit, digital circuit technology with the development of the function of the analog phase detector can be done using digital technology, so the phase detector technology can also be high-speed sampling, implemented in the digital circuit. Digital phase detector has a convenient debugging, implementation and simple. First, based on Matlab for analog I / Q circuit theory validated and the error analysis; thus completes the sampling methods and the use of digital I / Q phase; Finally, the digital I / Q phase method is applied to CCS, using TMS320F2812 DSP chip for programming and debugging, to achieve the purpose of the phase. From the basic theory and software simulation level, introduced the design process and debug procedures.

Keywords  phase detector  I/Q  phase method  Signal samplingChip TMS320F2812

目录

1、绪论 1

1.1 鉴相器的技术概论 1

1.2 鉴相器的分类 1

1.2.1模拟鉴相器 1

1.2.2数字鉴相器 2

1.3 国内外现状 3

1.4 研究的内容 4

2、鉴相器的原理及设计方案 4

2.1 鉴相器的原理 4

2.1.1模拟鉴相器 5

2.1.2.数字鉴相器 8

2.2 模拟I／Q方法的鉴相原理及误差分析 10

2.3 数字I/Q方法的鉴相原理及误差分析 12

3、鉴相器的MATLAB理论仿真 15

3.1  MATLAB的基本知识 15

3.2模拟I/Q鉴相器的验证 15