浅析通信原理中的增量控制

字数:3531,页数20   附任务书,开题报告

摘   要

     量调制可以看成是脉冲编码调制的一种特例。它只用一位二进制码表示幅度量化，这一位码表示的是前后抽样值的变化趋势（增加或减小，称为增量），故称为增量调制。为减小量化误差，增量调制必须采用比PCM高很多的抽样频率。简单增量调制存在斜率过载问题和动态范围问题，因而演变出数字压扩自适应增量调制和增量总和调制。
关键字：增量调制；脉冲编码；抽样频率；数字压扩

In brief analysis correspondence principle increase control
Yali Gu
0501 electronic informations
Abstract: The delta modulation may regard as is the pulse code modulation one kind of exceptional case.It only uses a binary code expression amplitude quantizing, this position code expresses is around samples the value change tendency (increase or reduces, is called increase), therefore is called the delta modulation.In order to reduce the quantification error, the delta modulation must use compares PCM Gao Henduo the sampling frequency. Simple delta modulation existence slope overload question and dynamirange question, thus evolves the digital pressure to expand the auto-adapted delta modulation and the increase sum total modulation.
Key words: Delta modulation; Pulse code; Sampling frequency; The digital pressure expands

目    录
摘    要 .....................................................................2
第一章   简单增量调制的原理 ..................................................3
1.1  概述 ....................................................................3
1.2  △M调制的波形图......................................................... 6
1.3  △M斜率过载问题..........................................................7
1.4  △M为临界过载时 .........................................................8
1.5  △M的最大量化信噪比..................................................... 8
1.6  小结 ....................................................................9
第二章  数字压扩自适应增量调制 ...............................................10
2.1  简单增量调制有两大问题.................................................. 10
2.2  连续可变斜率增量调制CVSD ................................................10
第三章  增量总和调制 .........................................................12
第四章  信道误码对增量调制的影响............................................. 15
致    谢..................................................................... 18
参考文献..................................................................... 19

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