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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 subcarrier, and the space diversity. We simulated proposed system under Rayleigh flat fading channel environment...
In TDD-CDMA (time division duplex-code division multiple access) systems, the chip-synchronous transmission in the uplink is obtainable and thus, leading to free MAI (multiple access interference) in flat Rayleigh fading channels plus AWGN (additive white Gaussian noise). This motivates us to develop a novel cooperative transmission strategy which allows single-antenna devices to benefit from spatial...
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