THE PERFORMANCE EVALUATION OF MULTI USER OFDM ORTHOGONAL CHAOTIC VECTOR SHIFT KEYING SUPPORTED BY LDPC

المؤلفون

  • Ansam M. Abed 1) Computer techniques Engineering Department, Al-Turath University, Baghdad, Iraq مؤلف
  • Fadhil S. Hasan 2) Electrical Engineering Department, College of Engineering, Mustansiriyah University, Baghdad, Iraq مؤلف

DOI:

https://doi.org/10.31272/jeasd.26.3.7

الكلمات المفتاحية:

differential chaos shift keying، MU-OFDM، LDPC، Log-Domain، Min-Sum

الملخص

Recently, LDPC code have become very important research area in wireless communication due to its ability to increase the capacity in a wireless fading environment, with low implementation complexity. In this paper, LDPC are combined with Multi User OFDM Orthogonal Chaotic Vector Shift Keying (MU-OFDM-OCVSK) communication system to improve the BER performance over multi-path Rayleigh fading channels. Two types of LDPC decoder are introduced that are Log-Domain and Min-Sum decoder. The system is simulated using MATLAB program version 2019a for different scenarios which include different number of iterations, different block lengths, different number of users and different number of spreading factor. The results show that a coding gain in a range of (4.5 – 7) dB is achieved between the coded and uncoded MU-OFDM-OCVSK system. The results also show that the Min-Sum decoder outperform the Log-Domain decoder in all scenarios.

 

التنزيلات

Key Dates

منشور

2022-05-01

كيفية الاقتباس

THE PERFORMANCE EVALUATION OF MULTI USER OFDM ORTHOGONAL CHAOTIC VECTOR SHIFT KEYING SUPPORTED BY LDPC. (2022). مجلة الهندسة والتنمية المستدامة, 26(3), 62-72. https://doi.org/10.31272/jeasd.26.3.7

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