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Secure Audio Transmission Over Wireless Uncorrelated Rayleigh Fading Channel 被引量:1
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作者 Osama S.Faragallah M.Farouk +1 位作者 Hala S.El-sayed Mohsen A.M.El-bendary 《Computers, Materials & Continua》 SCIE EI 2022年第1期1603-1615,共13页
Audio communications and computer networking play essential roles in our daily lives,including many domains with different scopes.Developments in these technologies are quick.In consequence,there is a dire need to sec... Audio communications and computer networking play essential roles in our daily lives,including many domains with different scopes.Developments in these technologies are quick.In consequence,there is a dire need to secure these technologies up to date.This paper presents an efficient model for secure audio signal transmission over the wireless noisy uncorrelated Rayleigh fading channel.Also,the performance of the utilized multiple secret keys-based audio cryptosystem is analyzed in different transformation domains.The discrete cosine transform(DCT),the discrete sine transform(DST),and the discrete wavelet transform(DWT)are investigated in the utilizedmultiple secret key-based audio cryptosystem.Simulation results show consistent results with the wireless noisy channel.The performance of the proposed multiple secret keys-based audio cryptosystem can be ranked concerning the employed domain as DWT,DCT,and DST transform techniques.The simulation experiments proved that the presented multiple secret keysbased audio cryptosystemfor audio signals transmitted over the wireless noisy uncorrelatedRayleigh fading channel achieves reliable and secure wireless link utilizing combined multi security layers. 展开更多
关键词 audio communications ENCRYPTION uncorrelated Rayleigh fading channel
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视听教学法 被引量:2
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作者 李香玲 贾超琴 《玉溪师范学院学报》 2005年第7期82-83,共2页
视听法的教学过程是一个感知、理解、练习和活用的过程,它的教学手段是通过各种图像和谈话、人的动作、体态、手势、表情及语调、节奏等语言直观手段,直接用外语进行释义和练习的情景语言教学。这种教学对培养学生口语极为有利。
关键词 视听法 情景教学 语言交际能力
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