@Article{, title={Study the Effect of Spreading Factor value on the Performance of Chaotic Modulation Schemes}, author={Faez Fawwaz Shareef and Atheer Alaa Sabri and Suha Irfan Abdulrahman}, journal={IRAQI JOURNAL OF COMPUTERS, COMMUNICATIONS, CONTROL AND SYSTEMS ENGINEERING المجلة العراقية لهندسة الحاسبات والاتصالات والسيطرة والنظم}, volume={18}, number={3}, pages={43-51}, year={2018}, abstract={High data rate and bandwidth efficiency are the requirements of modernwireless systems. Most studies introduce different ways to develop communication systemsto meet these requirements. The researches in the last few years focused on the chaoticsystem as a chaotic modulation due to its nature. So that the performances of variouschaotic modulation schemes (Initial Condition Modulation (ICM) and Chaotic Shift Keying(CSK)) in terms of bit error rate (BER), for different spreading factors are implemented inthis article and simulated using MATLAB 2016b simulation. The main objective of thispaper is to make a comparison of various chaotic modulation schemes under AWGNchannel and study the effect of the spreading factor (β) on the performance of differentchaotic modulation schemes, where the spreading factor (β) is the number of generatedchaotic signal samples during the bit period (Tb). Different values of spreading factor (12,16, 20, 40, 60, 80, and 100) samples are selected to implement various chaotic modulationschemes. The results show that the spreading factor value of (100) achieves goodperformance for all types of chaotic modulation schemes which are implemented here.Increasing the value of spreading factor over (100) such as (120, 140, and 180) will add alittle bit enhancement to the system, whilst the processing time will increase dramatically.

} }