A Modulator/Demodulator CMOS IC for Chaotic Encryption of Audio
A Modulator/Demodulator CMOS IC for Chaotic Encryption of Audio
复制标题
一种用于音频混沌加密的调制器/解调器 CMOS IC
DOI：
--
复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
M. Linan
中科院分区：
文献类型：
--
作者：
M. Delgado;Á. Rodríguez;M. Linan
本文报道了利用集成电路对音频信号进行混沌加密的首次实验验证。它基于gm-C调制器/解调器模拟CMOS IC，实现了一个三阶非线性微分方程。这是在2.4¿m双聚技术制造的，包括基于幅度检测的片上调谐电路。它能够产生可控的连续混沌信号。此外，测量还演示了如何利用它们之间的同步进行加密传输。在这些实验中，恢复信号的最坏情况信噪比大于+40dB（在音频频谱的低角），输入信号功率损失小于¿0.2dB。在更高的频率下，信噪比上升到+60dB，同时在接收器上保持类似的损失。
This paper reports the first experimental verification of chaotic encryption of audio signals using integrated circuits. It is based on a gm-C modulator/demodulator analog CMOS IC that implements a 3rd-order nonlinear differential equation. This has been fabricated in 2.4¿m double-poly technology and includes on-chip tuning circuitry based on amplitude detection. It is capable of generating controllable continuous-time chaotic signals. Also, measurements demonstrate how to exploit the synchronization between two of them for encrypted transmission. In these experiments, the worst-case signal to noise ratio of the recovered signal is greater than +40dB (at the low corner of the audio spectrum) with less than ¿0.2dB loss of the input signal power. At higher frequencies, the signal-to-noise ratio rises up to +60dB, while retaining similar losses at the receiver.