With the extensive use of multimedia services, the next generation of wireless mobile communication systems has been put forward higher requirements. The future wireless mobile communication systems should be able to offer higher data transmission rate, broader signal coverage and support higher mobility. The introduction of relay and relay cooperation communication into the existing network
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The multipath fading propagation channel is occurred in Wireless communication, which can be overcome by dividing the broad bandwidth into some sub-channels with Orthogonal Frequency Division Multiplexing (OFDM). As an effective high-speed digital transmission mode, OFDM and the adaptive transmission have been comprehensively considered as the major candidate technique for future mobile communication systems. The
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