| Performance Analysis of CDMA-OFDM System via Cooperative Communication in Wireless Fading Environment |
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Hwi-Jae Jeong, Hyung-Yun Kong |
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Department of Electrical Engineering, University of Ulsan |
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| Abstract |
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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. |
| Key words:
CDMA-OFDM, Cooperative Communication, Diversity Decode and Forward, MRC, ML Detect |
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