NDLI: RSA/Shift Secured IFFT/FFT Based OFDM Wireless System

Content Provider	IEEE Xplore Digital Library
Author	Rajaveerappa, D. Almarimi, A.
Copyright Year	2009
Abstract	The research on wireless system is to improve the reliability and performance of wireless radio links. The effects of (multi-path) radio propagation, modulation, and coding and signal processing techniques on the spectrum efficiency and performance of wireless radio networks are studied, in particular Orthogonal Frequency Division Multiplexing (OFDM) and related transmission methods. But the multimedia information is not secured in the wireless environment compared to that of wired environment. In this paper, we have carried out a new method of cryptographic algorithm over a future generation (4G and above) wireless system called the OFDM (FFT (Fast Fourier Transform) / IFFT (Inverse FFT)) technique using Walsh Hadamard spreading codes. We have done the simulation in MATLAB programming and the BER (Bit Error Rate) vs. SNR (Signal-to-Noise Ratio) performance is studied for multimedia signals (such as text, audio and image) in an AWGN wireless channel. We have also developed an algorithm for generating the Walsh codes and the RSA secret keys. We found the results of our simulation are very much satisfactory for practical implementation in wireless systems.
Starting Page	208
Ending Page	211
File Size	282852
Page Count	4
File Format	PDF
ISBN	9780769537443
DOI	10.1109/IAS.2009.356
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-08-18
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Communication system security Signal processing algorithms Bit error rate AWGN Radio link Radio propagation Modulation coding OFDM modulation Signal processing Radio network and Multimedia Orthogonal Frequency Division Multiplexing Walsh Hadamard Shift Ciphering RSA
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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