摘要
针对当前移动通信网的安全缺陷和端到端通信方式存在多种安全问题,降低窃听的风险,保证端到端语音通信的安全性,研究语音加密通信中类语音调制解调算法。为保证加密后的语音数据能在正常在移动通信网中进行传输,主要借助OFDM技术,将加密后的语音数据承载到调制信号上,该信号的频率被限制在GSM声码器带通频率范围内,能以较小的失真通过GSM声码器信道,并且不引发VAD检测机制,解调端能相应的准确解调,从而实现数据抗声码器压缩传输。
For that there are many security problems in current mobile communication network and endto- end communication mode, and for reducing the risk of eavesdropping and ensuring the security of endto- end voice communication, a speech-like modulation-and-demodulation algorithm in speech-encrypted communication is explored. For the purpose to ensure the normal transmission of the encrypted voice data in the mobile communication network, with the help of OFDM technology, the encrypted voice data is loaded onto the modulated signal, and the frequency of this signal is limited to the bandpass frequency range of GSM vocoder. It can pass through the channel of GSM vocoder with a fairly small distortion without triggering the VAD detection mechanism. And the demodulator can accurately demodulate the signal, thus realizing the data anti-vocoder compression transmission.
作者
范超
袁琼
孙莹
李晓峰
FAN Chao;YUAN Qiong;SUN Ying;LI Xiao-feng(Beijing Electronic Science and Technology Institute,Beijing 100070,China;Zhongan Network (Beijing) Technology Corporation,Beijing 100070,China)
出处
《通信技术》
2019年第5期1215-1218,共4页
Communications Technology
基金
中央高校基本科研业务费专项资金项目(No.2017LG-SY)~~
关键词
端到端通信
OFDM
类语音调制
end-to-end communication
OFDM
speech-like modulation