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Articles

Lattice-Based Coding to Enhance Error Performance of the Hidden Direct Sequence Spread Spectrum

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Abstract

A direct sequence spread spectrum is employed together with a lattice coding scheme to enhance physical layer security and efficiency of a wireless communication system against the denial of service attacks, due to the presence of deliberate unwanted interferences. Based on the results, using a direct sequence spread spectrum together with a random “construction A” lattice coding scheme named “DSSS/RCA” can highly improve the error performance compared with similar methods. Regarding a typically large block code length, some constraints on the coding rate and average signal to noise ratio are drawn to guarantee a block error probability which is asymptotically close to zero. Also, the secrecy capacity of DSSS/RCA is investigated and the achievability of perfect secrecy is verified.

Additional information

Notes on contributors

Nader Sanandaji

N Sanandaji received his BSc in computer engineering and MSc in secure communications engineering, both from Iran University of Science and Technology (IUST), Tehran, Iran in 2011 and 2013, respectively. Currently, he is a PhD candidate at the department of electrical engineering of Iran University of Science and Technology. His research fields include channel coding, physical layer security, CDMA systems and radar waveform design. E-mail: [email protected]

Abolfazl Falahati

A Falahati received his BSc in electronics engineering from the University of Warwick, Coventry, United Kingdom, in 1982. At Loughborough University, United Kingdom, he earned his MSc and PhD degrees both in communications system engineering. From 1991 to 1995, he was with Rutherford-Appleton Laboratory, Oxford, United Kingdom. Since 1995, he has been with the department of electrical engineering, Iran University of Science and Technology. He is currently an associate professor, supervising the Digital Coding and Cryptography Laboratory. He is a full-member of IEEE communications society. His fields of interest are cryptography, channel coding, interference alignment, spread spectrum communication systems and digital signal processing.

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