Recovery of Image through Alamouti Channel with Incorporation of RSA Algorithm  

作　　者：Aninda Majumder Mohammad Raihan Ruhin Tahsina Hashem Md. Imdadul Islam Aninda Majumder;Mohammad Raihan Ruhin;Tahsina Hashem;Md. Imdadul Islam(Department of Computer Science and Engineering, Jahangirnagar University, Dhaka, Bangladesh)

机构地区：[1]Department of Computer Science and Engineering, Jahangirnagar University, Dhaka, Bangladesh

出　　处：《Journal of Computer and Communications》2016年第2期1-10,共10页电脑和通信（英文）

摘　　要：In many applications, it is necessary to transmit images at a remote station, where wired Internet service is not available. In this case, wireless local loop (WLL) can help in making wireless link between one end node of the internet and remote service center. In such link, the communication is heavily affected by large and small scale fading;hence the received signal experiences huge distortion in case of forward error correction. Otherwise, huge service delay arises due to frequent negative acknowledgements. To combat the situation, we can choose Alamouti channel of full rate and fully orthogonal space-time block code (OSTBC). Our aim is to transmit images through Alamouti channel and to observe the quality of the recovered image, in context of bit error rate (BER). We have also observed the impact of fading and additive white Gaussian noise (AWGN) on the image without application of error correction or detection technique of channel coding. To ensure security, we apply the RSA algorithm on each pixel prior transmitting and decrypt them at the receiving end, where we found no impairment from the algorithm. Finally, we observe that the relative performance of the system changes digital modulation schemes.In many applications, it is necessary to transmit images at a remote station, where wired Internet service is not available. In this case, wireless local loop (WLL) can help in making wireless link between one end node of the internet and remote service center. In such link, the communication is heavily affected by large and small scale fading;hence the received signal experiences huge distortion in case of forward error correction. Otherwise, huge service delay arises due to frequent negative acknowledgements. To combat the situation, we can choose Alamouti channel of full rate and fully orthogonal space-time block code (OSTBC). Our aim is to transmit images through Alamouti channel and to observe the quality of the recovered image, in context of bit error rate (BER). We have also observed the impact of fading and additive white Gaussian noise (AWGN) on the image without application of error correction or detection technique of channel coding. To ensure security, we apply the RSA algorithm on each pixel prior transmitting and decrypt them at the receiving end, where we found no impairment from the algorithm. Finally, we observe that the relative performance of the system changes digital modulation schemes.

关 键 词：Quotient and Remainder Matrix Alamouti Simulator Multiple-Input Single-Output (MISO) Image Encryption and Decryption BER and Discrete Wavelet Transform (DWT) 

分 类 号：TN9[电子电信—信息与通信工程]