电子信息与通信 专业英语 Deyelopment Platform ardware 赵藏清主编 哈尔滨工业大学出版社
电子信息与通信 专业英语 赵淑清主编 哈尔滨工业大学出版社 哈尔滨
内容提要 本书以培养学生专业英语阅读能力为主要目标。内容包括:基础电子 学、信号的信息处理及通倍的理论、计算机原理及应用信号处理专题以及一 些电子仪器设备及部件的说明书 本书可作为大学电子信息工程和通信工程专业三四年级本科生的专业 英语教村,也可供广大工程技术人员使用。 电子信息与通僧专业英语 tanzi Ximi yu Tongxin Zhanye Yingyu 赵淑清主编 哈尔滨工业大学出版社出版发行 哈尔滨工业大学印別厂印刚 开本850×11681B2印张975字数286千字 200年3月第1版2000年3月第1次印刷 印数1-500 ISBN75603-14503H141定价12.00元
Content Chapter 1 Basic Electronic 1. 1 Receiver Circuits 1.2 Digital Design 1.3 Digital Signal and Discrete- Time Systems Chapter 2 Signal Processing and Electronie System.50 2.1 Digital Filter Design……………………… Image Enhan 2.3 Speech Coummunications…………………" 24 PCM and digital Tramsmission…… 3. i Introduction to unix e++.. 3.2 Data Base 131 33 Boran C………………… Chapter4spec| TopIcs in signal Processing……175 4.2 The Least Mean squares(M) algorithm…………190 4.3 Pattem Classification by Distance Functions……208 4.4 The Delta Rule and Leaming by Back-Propagation 18 Chapter5 struction Manual………… 5.1 Mobile phone…… 5.2 Specificationg for So 246 ………246 5.4 SKYe 5.5 ADSP-2106x SHARC DSP Micro-Computer Family 5.6TMS320C5X…
Chapter 1 Basic Electronics 1.1 Receiver Circuits The purpose of a receiver is to select a desired group of frequencies from one transmitter, get rid of all unwanted signals and noise, and then demodulate the signal to obtain the modulating infomation. The better the receiver does its job, the closer the demodulated sigmal will resemble the original signal from the transmitter. Regardless of the type of demodula 40n required, the main functions performed by a receiver are filtering and amplifying. The superheterodyne receiver is the logical choice for the job 1.1.1 Superheterodyne Receiver Since it is easier to desigm narnow-bend, steep-akirt filters and ob tain high gains at lower frequencies, the ahet" recever is an e伍 cient design. All incoming signals are mixed with the output of a local os- illator and the difference frequency is selected and amplified by the termediate frequency amplifiers. The big benefit is that these amplifiers remain at a fixed frequency and only the RF amplifier and local oscillator need be tunable. Fig. 1. 1 is a block diagram of a typical superhet receiv- er. One further benefit is the fact that the gain is concentrated at two or sametimes three different fequencies. This reduces the gain required at RF AGC x hg. 1.I Block dagra of a superheterodyne recelver