摘要
介绍了无线同频同播系统的原理,通过分析得出同频干扰产生的原因是由于载波频率和调制特性的差异所致。从发射机安装、载频精度、频率偏移、音频参数优化等方面提出了抑制同频干扰的对策,并在MATLAB中进行了仿真验证,对研制、完善和应用无线同频同播系统具有较高的实用价值。
The principle of wireless co-frequency simulcast system is introduced. Analysis demonstrates that the co- channel interference is caused by the differences in carrier frequencies and modulation characteristics. A corresponding countermeasures of suppressing co-channel interference is proposed after evaluating the transmitter installation, carrier frequency accuracy ,frequency offset and audio parameter optimization aspects,and is verified by MATLAB simulation. The research is of high practical values for developing, perfecting and applying wireless co- frequency simulcast systems.
出处
《电讯技术》
北大核心
2009年第11期18-22,共5页
Telecommunication Engineering
基金
成都信息工程学院自然科学与技术发展基金项目(GSRF200603)
关键词
同频同播系统
同频干扰
载波频率
调制特性
co - frequency simulcast system
co - channel interference
carrier frequency
modulation characteristics