目 录
摘 要..................................................................................................................................................1
Abstract..............................................................................................................................................2
目 录..................................................................................................................................................3
第 1 章 绪论......................................................................................................................................5
1.1 课题背景..............................................................................................................................5
1.2 无线电通信技术的发展概况..............................................................................................5
1.2.1 无线电通信技术在国内外的发展历史...................................................................5
1.2.2 无线音频通信技术的发展趋势..............................................................................6
1.3 课题内容..............................................................................................................................7
第 2 章 无线 FM 音频通信系统相关理论......................................................................................8
2.1 调频信号的数学模型..........................................................................................................8
2.1.1 调频信号表达式.......................................................................................................8
2.1.2 调频信号的参数.......................................................................................................8
2.2 频谱结构理论......................................................................................................................9
2.2.1 傅里叶级数...............................................................................................................9
2.2.2 周期信号傅里叶变换...............................................................................................9
2.3 锁相环原理........................................................................................................................10
2.4 脉冲宽度调制原理............................................................................................................11
2.5 本章小结............................................................................................................................11
第 3 章 系统的方案论证................................................................................................................12
3.1 总体方案论证....................................................................................................................12
3.1.1 调制方式方案论证.................................................................................................12
3.1.2 无线信道选择的方案论证.....................................................................................12
3.2 发射机设计方案论证........................................................................................................13
3.2.1 调频模块方案论证.................................................................................................13
3.2.2 高频功率放大器设计方案论证............................................................................13
3.3 接收机设计方案论证........................................................................................................14
3.3.1 天线接收放大器设计方案论证............................................................................14
3.3.2 本地振荡器设计方案论证.....................................................................................14
3.3.3 乘法器设计方案论证.............................................................................................15
3.3.4 LPF 设计方案论证.................................................................................................15
3.3.5 中频接收机设计方案论证.....................................................................................16
3.3.6 低频功率放大器设计方案论证............................................................................16
3.4 本章小结............................................................................................................................17
第 4 章 系统设计所使用相关器件介绍........................................................................................17
4.1 宽带运放 OPA847.............................................................................................................17
4.2 乘法器 AD835...................................................................................................................17
4.3 锁相环 NE564....................................................................................................................19
