RSA/Shift Secured IFFT/FFT Based OFDM Wireless System

2009 Fifth International Conference on Information Assurance and Security Pub Date : 2009-08-18 DOI:10.1109/IAS.2009.356

D. Rajaveerappa, A. Almarimi

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引用次数: 9

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.

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基于RSA/Shift安全IFFT/FFT的OFDM无线系统

无线系统的研究是为了提高无线链路的可靠性和性能。研究了(多路径)无线电传播、调制、编码和信号处理技术对无线无线电网络频谱效率和性能的影响，特别是正交频分复用(OFDM)和相关的传输方法。但是与有线环境相比，无线环境下的多媒体信息的安全性不高。在本文中，我们使用Walsh Hadamard扩频码在下一代(4G及以上)无线系统上进行了一种新的加密算法方法，称为OFDM (FFT(快速傅里叶变换)/ IFFT(逆FFT))技术。我们用MATLAB编程进行了仿真，研究了AWGN无线信道中多媒体信号(如文本、音频和图像)的误码率与信噪比的性能。我们还开发了一种用于生成Walsh代码和RSA密钥的算法。我们发现我们的仿真结果非常令人满意的实际应用在无线系统中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2009 Fifth International Conference on Information Assurance and Security

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