摘要
提出了一种新型无线窄带通信系统的设计方案,该方案基于数字化的信源和信道编码方法,采用了两点调制和二次调制等技术,可兼容欧洲公众数字对讲机标准(DPMR),并通过研制得以实现。实测结果表明,系统接收灵敏度达-110 dBm,可满足远距离无线语音通信和中低码率的数据通信的要求。
A method is proposed about the design of a novel wireless narrow-band communication system. The method is based on digital source coding and digital channel coding. The method employs techniques such as two-point modulation and second modulation, which is compatible with the standard of Digital Private Mobile Radio （DPMR）. The method is implemented through research and development. The result of experiments shows that the receiving sensitivity of the system reaches - 110 dBm. The system can meet the demands of longdistance voice communication or long-distance data communication with medium or low bit rate.
出处
《电讯技术》
北大核心
2012年第9期1432-1437,共6页
Telecommunication Engineering
基金
国家高技术研究发展计划(863计划)项目(2011AA100701)~~
关键词
数字通信
窄带通信
语音通信
两点调制
二次调制
digital communication
narrow-band communication
voice communication
two-point modulation
second modulation
