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Enhanced Secure Error Correction Code Schemes in Time Reversal UWB Systems

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Abstract

In this paper, secure channel coding schemes based on turbo codes are suggested for time reversal ultra wideband (TR-UWB) systems. Turbo code has the capability of error correction near Shannon’s limit. Adding security to turbo code is an attractive idea since it could reduce the overall processing cost of providing secure coded data and enjoys the advantages of high-speed encryption and decryption with high security, smaller encoder and decoder size and greater efficiency. The proposed turbo code schemes are labeled as follows: secure puncturing rate, secure frame length, and secure interleaving. Using these scenarios, secure turbo code is defined in a way that the redundant information used for error correction is not pre-determined by the nature of the error correction part of the algorithm but it can be chosen arbitrarily out of the whole set of possible strings. The lower bound of bit error probability for secure turbo code schemes in AWGN and TR-UWB systems are evaluated. Analytical and simulation results show secure turbo code performance is very satisfying. Various crypto-analytical attacks are investigated against these schemes. Based on this analysis, secure turbo code structures changed during the encryption procedure to increase the complexity of linear and differential cryptanalysis. It is seen that the performance of conventional turbo code and random frame length with Poisson distribution are the same. Comparing these schemes shows, secure interleaving approach has the best performance and secure puncturing rate the worst, but the latter provides the most security. The enhanced security of UWB, due to rich multipath nature of UWB channel, could be exploited. Due to space-time focusing property of time reversal UWB, there is an environmental confidentiality (or spatial security), which is additional security for secure turbo code in this system. Using secure turbo code, it is possible to increase the transmission range of UWB systems.

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Authors and Affiliations

  1. School of Electrical Engineering, Department of Telecommunications, Iran University of Science & Technology (IUST), Narmak, Tehran, Iran

    Dariush Abbasi-Moghadam & Vahid Tabataba Vakili

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  1. Dariush Abbasi-Moghadam
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  2. Vahid Tabataba Vakili
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Correspondence to Dariush Abbasi-Moghadam.

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Abbasi-Moghadam, D., Vakili, V.T. Enhanced Secure Error Correction Code Schemes in Time Reversal UWB Systems. Wireless Pers Commun 64, 403–423 (2012). https://doi.org/10.1007/s11277-010-0206-2

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  • DOI: https://doi.org/10.1007/s11277-010-0206-2

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