Performance Analysis of CDMA-OFDM System via Cooperative Communication in Wireless Fading Environment

• Jeong Hwi-Jae (Department of Electrical Engineering, University of Ulsan) ;
• Kong Hyung-Yun (Department of Electrical Engineering, University of Ulsan)
• Published : 2006.09.01
• 49 4

Abstract

Signal distortion due to the path loss, shadow, and multi-path fading is very serious in radio channel. In this paper, we propose CDMA-OFDM cooperative communication system based on DFP(Decode and Forward Protocol) to overcome these phenomena using spread spectrum technique, orthogonal sub-carrier, and the space diversity. We simulated proposed system under Rayleigh flat fading channel environment. A variety of simulation results reveal the cooperation can provide performance gain of up to 12 dB over direct communications in ideal inter-user case at BER of $10^{-3}$. And we can also confirm variation of diversity effect as channel environment changes.

Keywords

CDMA-OFDM;Cooperative Communication;Diversity Decode and Forward;MRC;ML Detect

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