TITLE:
Recovery of Image through Alamouti Channel with Incorporation of RSA Algorithm
AUTHORS:
Aninda Majumder, Mohammad Raihan Ruhin, Tahsina Hashem, Md. Imdadul Islam
KEYWORDS:
Quotient and Remainder Matrix, Alamouti Simulator, Multiple-Input Single-Output (MISO), Image Encryption and Decryption, BER and Discrete Wavelet Transform (DWT)
JOURNAL NAME:
Journal of Computer and Communications,
Vol.4 No.2,
February
15,
2016
ABSTRACT: 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.