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The quality of data transmission and their security are among the most important parameters of a telecommunication system. The correlation properties of the spreading sequences play the main role to suppress the effect of different types of interference. Likewise, the randomness properties of the spreading sequences have a great impact on the establishment of a secure channel between transmitter and receiver. Besides, the generation of the long binary sequences is still challenging and counted as an open issue. Due to this fact, a new sequence construction is introduced to improve the BER performance of the CDMA system. PSO algorithm is employed to optimize the constructed sequences from the Auto-Correlation point of view. Also, a CDMA system with a protocol of dynamic spreading codes is implemented in order to evaluate the optimized constructed sequences and prove the feasibility of them for the real time CDMA system.

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Mahdiyar Sarayloo received his M.Sc. in 2011 from the University of Southampton (UK) for his research on System On Chip (SOC). He completed his Ph.D at Universita´ Politecnica delle Marche (Italy), in 2016, by working on the analysis and evaluation of the performance of De Bruijn sequences in multiple user communications, such as CDMA-based system.

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