Abstract
Spread spectrum linked to optimization techniques play a very important role in today’s world. Optimization gives the best one among all the solutions and the spread spectrum is used to minimize distortion, hence optimized spreading code is very important in wireless communication. This study shows a comparison of two recent modified techniques of differential evolution (DE) with the help of engineering design problems and application of that modified DE, considering the better one, in wireless communication to optimize logistic map based spreading code. A comparative study of properties of both optimized and non-optimized spreading code is also discussed in this paper. The performance of the optimized spreading code is also evaluated with the help of bit error rate (BER) by applying it in static and dynamic direct sequence spread spectrum system (DSSS). The performance of the proposed technique (optimized dynamic logistic map code based DSSS) displays better results than non-optimized spreading code and orthogonal spreading code considering BER. Static optimization is improved by 40% than non-optimized static, dynamic optimization is improved by 70% than static optimization but orthogonal is showing 33% improvement comparing to static optimization and dynamic optimization is improved by 56% than orthogonal one. Therefore, the proposed method can be efficiently applied in the wireless communication system.
Highlights
The meaning of the spread spectrum in wireless communication means signal bandwidth expansion by multiplying the message signal with another signal called spreading signal (PN sequence)
This paper shows a comparative study of two recent modified techniques of Differential evolution (DE) with the help of engineering design problems and application of that modified DE in wireless communication to optimize logistic map based spreading code
The performance of the optimized spreading code is evaluated with the help of bit error rate (BER) by applying it in static and dynamic direct sequence spread spectrum system (DSSS)
Summary
The meaning of the spread spectrum in wireless communication means signal bandwidth expansion by multiplying the message signal with another signal called spreading signal (PN sequence). Optimized chaotic code plays a very important role in wireless communication techniques [3], [4]. Various enhance methods of DE by modifying its parameters show a very good performance comparing to different recent optimization techniques [9]. This paper shows a comparative study of two recent modified techniques of DE with the help of engineering design problems and application of that modified DE (considering the better one) in wireless communication to optimize logistic map based spreading code. The performance of the optimized spreading code is evaluated with the help of bit error rate (BER) by applying it in static and dynamic direct sequence spread spectrum system (DSSS). The performance of the proposed technique (optimized logistic map code based DSSS) displays better results considering BER.
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