| 多片TMS32010构成的全双工模数模语音置乱系统 |
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| 引用本文： | 叶华,曹秀英.多片TMS32010构成的全双工模数模语音置乱系统[J].东南大学学报(自然科学版),1989,19(5):62-68. |
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| 作者姓名： | 叶华 曹秀英 |
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| 作者单位： | 东南大学无线电工程系，东南大学无线电工程系，东南大学无线电工程系 |
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| 摘 要： |
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| 关 键 词： | 保密电话 双工系统 语音置乱 消声 |
Multiple TMS32010 Based Analog Full-Duplex Speech Scrambling System |
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| Ye Hua Cao Xiuying Wu Boxiu.Multiple TMS32010 Based Analog Full-Duplex Speech Scrambling System[J].Journal of Southeast University(Natural Science Edition),1989,19(5):62-68. |
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| Authors: | Ye Hua Cao Xiuying Wu Boxiu |
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| Institution: | Department of Radio Engineering |
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| Abstract: | This paper presents an analog full-duplex speech scrambling system implemented with multiple DSP processors (TMS32010). The scrambling and deserambling algorithms are based on the asynchronous speech encryption technique proposed by Lee, et al. An adaptive echo canceller is employed to eliminate the echo interferences in the system. The influence of the scrambling process on adaptive filtering performance is studied by computer simulation. The relation between the echo cancellation level and the tap number of the adaptive filter is derived under the assumption of a practical echo channel model. The system has been implemented and tested, it is expected to be used to achieve full-duplex scrambled speech communication either in conventional telephone lines or in narrow-band radio channels. |
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| Keywords: | adaptive fillter echo cancellation duplex systoms/speech scrambling secured telephone |
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