PERFORMANCE ANALYSIS OF QUADRATURE CHAOS SHIFT

Authors

  • Hesham Adnan Alabbasi Computer Science Department, Mustansiriyah University, College of Education, Iraq, Baghdad.
  • Izz Kadhum Abboud Computer Engineering Department, Mustansiriyah University, College of Engineering, Iraq, Baghdad
  • Fadhil Sahib Hasan Electrical Engineering Department, Mustansiriyah University, College of Engineering, Iraq, Baghdad.

DOI:

https://doi.org/10.14311/AP.2020.60.0001

Keywords:

DCSK, SR-QCSK, high information rate, energy saving, performance analysis, chaotic maps.

Abstract

One of the most famous techniques of non-coherent differential chaos shift keying (DCSK) is Quadrature chaos shift keying (QCSK) system, this system suffered from lowering the data rate and increasing the bit energy during the bit transmission even though its rate doubling the one of the DCSK. Short reference (SR) algorithm is proposed for the QCSK system to design the SR-QCSK communication system that enhances these drawbacks. The main idea of the short reference technique is minimizing the length of the reference chaotic signal (β) at a transmitter by a factor P comparing to produce R samples for the new reference signal while the length of the information-bearing signal remained unchanged, this occurs by duplicating the reference signal P times to get the same length as the conventional QCSK. Therefore, the symbol duration is reduced from 2βTc to (R+β)Tc. The data rate and energy saving improvement factor in a percent form is derived and compared with the QCSK and DCSK systems. Also, the BER analytical expression is derived for the SR-QCSK in additive white Gaussian noise and Rayleigh fading channel. The experimental simulation results proved that the theory derivation gives a good analysis tracking for the BER performance. The SR-QCSK system is compared with other DCSK techniques and the simulation results show that it has a superior performance in the multipath Rayleigh fading channel.

Downloads

Download data is not yet available.

Author Biographies

  • Hesham Adnan Alabbasi, Computer Science Department, Mustansiriyah University, College of Education, Iraq, Baghdad.
    Computer Science Department
  • Izz Kadhum Abboud, Computer Engineering Department, Mustansiriyah University, College of Engineering, Iraq, Baghdad
    Computer Engineering Department
  • Fadhil Sahib Hasan, Electrical Engineering Department, Mustansiriyah University, College of Engineering, Iraq, Baghdad.
    Electrical Engineering Department

Downloads

Published

2020-03-02

Issue

Vol. 60 No. 1 (2020)

Section

Articles

License

Authors who publish with this journal agree to the following terms:

1. Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.

2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.

3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

4. ddd

How to Cite

Alabbasi, H. A., Abboud, I. K., & Hasan, F. S. (2020). PERFORMANCE ANALYSIS OF QUADRATURE CHAOS SHIFT. Acta Polytechnica, 60(1), 1-11. https://doi.org/10.14311/AP.2020.60.0001