电视音响无线发射与接收装置的设计论文毕业论文.doc

中文摘要 随着无线通信技术的迅速发展，无线发射与接收装置已广泛地应用于通信、计算机、自动控制、自动测量、遥控∕遥测、仪器仪表、医疗设备和家用电器等领域。家用电器之间的有线连接，使得其使用很不方便。因此越来越多的家用电器(例如，电视机、 DVD、游戏机)开始采用无线传输技术来收发音视频数据，通过采用无线传输技术使得家电可以随意更换摆放位置，而且在电视机使用中普遍存在一个问题，如果在家人休息时使用时就会影响到家人。但是如果能设计出电视电视音响无线发射与接收的装置，那么这个问题就可以迎刃而解了。因此本设计具有很高的实用价值。 该装置可将人们发出的声音转换成受音频信号调制的放大的高频载波信号，通过天线向空间发射，然后通过音响无线接收电路和耳机的作用将音频信号解调还原为声音或与电视播出的声音同时播放出来，用户可以通过耳机很方便的听到声音，而不影响到其他人。 关键词：无线通信 调制 高频载波信号 解调 Abstract With the rapid development of wireless communication technology, the wireless transmitter and receiver devices have been widely used in communications, computer, automatic control, automatic measurement, remote control / telemetry, instrumentation, medical equipment and household appliances and other fields. Wired connection between the household appliances, making it very easy to use. More and more household appliances (eg, TV, DVDs, game consoles) began to use the wireless transmission technology to send and receive audio and video data through the use of wireless transmission technology makes home appliances can freely change the placement, and use the TV a common problem, family rest, will affect the family. But if we can design a wireless transmitter and receiver devices of the television and television audio, then this problem can be solved. Therefore, this design has a high practical value. The device to convert people to the voice of the high-frequency carrier signal modulated by the audio signal amplified by the antenna to the space launch, and then through a wireless audio receiver circuit and headphone to restore the audio signal demodulator for sound or television broadcastout the sound while playing, the user can hear the sound through headphones, without affecting the others. Keywords：wireless communications modulation high-frequency carrier signal demodulation 目 录 第1章 绪 论 1 1.1通信系统概述 1 1.2无线通信系统的基本组成 1 1.2.1无线通信系统组成框图 1 1.2.2 各部分功能 2 1.3发射与接收设备的工作过程及原理 3 1.3.1 发射设备的工作过程及原理 3 1.3.2 接收设备的工作过程及基本原理 5 1.4 无线电波的传播 6 1.5未来无线通信技术的发展趋势 7 第2章 AM，F