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Computer Science ›› 2015, Vol. 42 ›› Issue (10): 92-94.

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Multi-hop Relay OFDM System Based on Subcarrier Selection Pairing and Optimal Power Allocation

FENG Liang   

  • Online:2018-11-14 Published:2018-11-14

Abstract: In order to improve network coverage and network capacity of OFDM cooperative communication systems,a multi-hop relay OFDM system based on subcarrier selection pairing and optimal power allocation was proposed.Performance analysis of matching pair of relay and non-matching pair of relay was performed on OFDM relay system model the sub-carrier selection paired was converted to an integer programming problem,and pairing matrix was calculated using a matrix-based planning approach based on Hungarian algorithm.Then,according to the power allocation problem of OFDM systems, under KKT conditions optimized relay power and power allocation method were used.The final simulation results show that compared to the program resource allocation with QoS statistical quality assurance and resource allocation algorithm of OFDM relay system of heterogeneous services,the proposed method improves network coverage and capacity with better results.

Key words: Relay OFDM system,Subcarrier selection pairing,Optimal power allocation,Network coverage,Network capacity

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