摘要
传统模拟对讲机由于频谱利用率低、抗干扰性能差、频道开放、不具有保密性等原因已经很难满足需求。介绍的无线双模对讲机用于改善传统模拟对讲机抗干扰及保密性差的缺点,所提双模对讲机设计方案综合了集群和无中心两种工作模式功能,具有灵活设置与抗干扰性强的优点。重点设计了对讲机的软硬件结构,还对音频编解码进行了讨论分析。经测试,可实现距离350米内误码率低于10-4,文中所设计的无线双模对讲机可提供良好的性能。
Traditional analog interphone has been difficult to meet the increasing applicable demands for its low spectrum utilization rate, bad anti-jamming ability, unsafe channel and bad confidentiality. This paper introduces wireless dual modulus interphone, which is used to improve the weakness such as bad anti-jamming ability and bad confidentiality of traditional analog interphone. The design of dual modulus interphone integrated the function of two modes, cluster and no center, which has advantages of flexible and robust. The realization of the hardware and software structure of wireless interphone is focused and discussed in detail. We also make experiments and analysis of voice encoding and decoding. Through the measurements, it realizes that bit error rate is below 10-4 in 350 meters. So the wireless dual modulus interphone can provide good performance.
出处
《信息技术》
2013年第1期9-12,16,共5页
Information Technology
基金
国家自然科学基金项目(61002014
60972017
60972018)
北京理工大学育苗重大专项项目(X01011)
新一代宽带无线移动通信网国家科技重大专项(2010ZX03002-003-03)
关键词
双模对讲机
集群和无中心模式
音频编解码
误码率性能
dual modulus interphone
cluster mode and no center mode
voice coding and decoding
bit error rate performance
