一种抗RPE-LTP声码器压缩的端到端数据传输方法
1.东南大学信息安全研究中心,南京210096;2.福建师范大学网络安全与密码技术重点实验室,福州350007,东南大学信息安全研究中心,南京210096,东南大学信息安全研究中心,南京210096,东南大学信息安全研究中心,南京210096
下一篇 上一篇
摘要
提出了一种基于正交频分复用(OFDM)的抗规则脉冲激励-长时预测声码器(RPE-LTP)压缩的端到端数据传输方法。根据RPE-LTP声码器特性,将待传输数据分别调制到正交的低频正弦载波上,用快速傅立叶逆变换运算实现信号的调制传输,调制后的波形符合声码器的时频特性。经仿真结果验证,提出的抗压缩传输方法的数据传输速率可达2.4 kb/s,误码率小于0.3 %,适合移动网络端到端实时安全语音数据传输使用。
关键词
声码器 ; 规则脉冲激励-长时预测 ; 正交频分复用 ; 快速傅立叶变换
参考文献
[ 1 ] Lo Chichun, Chen Yujen.Secure communication mechanisms for GSM networks [ J] .IEEE Transactions on Consumer Electronics, 1999 ,45 ( 4 ) : 1074 ~1079
[ 2 ] Street M.Interoperability and international operation:an introduction to end to end mobile secure [ A] .IEE Secure GSM and Beyond: End to End Security for Mobile Communications [ C] .London, UK, Feb 2003 链接1
[ 3 ] Challans P, Gover R, Thorlby J P. End to end data bearer performance characterization for communications over wide area mobile networks [ A] .IEE Secure GSM and Beyond: End to End Security for Mobile Communications [ C] .London, UK, Feb 2003
[ 4 ] ETSI Standard GSM 06.10 , Digital cellular telecommunications system: Full rate speech transcoding [ S] .ETSI SMG 2 Group, Valbonne, France, Mar 1997
[ 5 ] 白剑,杨榆,徐迎晖,等.GSM移动通信系统中语音隐藏算法研究[J].中山大学学报,2004,43(2):156~159 链接1
[ 6 ] Katugampala N N, Ai-Nami K T, Villette S, et al.Real time data transmission over GSM voice channel for secure voice & data applications [ A ] .The 2nd IEE Secure Mobile Communications Forum: Exploring the Technical Challenges in Secure GSM and WLAN [ C] .London, UK, Sept 2004 链接1
[ 7 ] 陈一帅.GSM语音加密研究[D].北京:北方交通大学,2001
[ 8 ] Mcaulay R J, Quatieri T F.Speech analysis /synthesis based on a sinusoidal representation [ J] .IEEE Transactions on Acoustics, Speech and Signal Proceeding, 1986 , 34 ( 4 ) :744 ~754 链接1
[ 9 ] Speth M, Frchtel S A, Fock G,et al.Optimum receiver design for OFDM based broadband transmission-part II: a case study [ J ] . IEEE Transactions on Communications, 2001 , 47 ( 11 ): 571 ~578 链接1