| With the development of communication technology, efficient resource allocation hascaused the attention of everybody, however, the resource of wireless network is limited,and therefore we need more effective resource allocation scheme to ensure the highutilization rate of frequency spectrum and transmission rate. Currently, most of theexisting resource allocation schemes only focused on system throughput, hence weresearch OFDM two-way relay network, and the main contents are as follows.Firstly, for single-user multi-relay OFDM network, we propose an efficient resourceallocation algorithm with physical layer network coding aiming at improve the energyefficiency under the required rate. Compared with previous algorithm, we resolve theinitial problem into several sub-problems to make a reduction in the computationalcomplexity of KKT conditions, joint power allocation, relay selection and subcarrier pair.Moreover, the algorithm follows edge adaptive resource allocation norm, which has greatadvance in energy efficiency performance.Secondly, we focuses on the resource allocation issue for OFDM two-way relaynetwork, considering the problem of multiuser access with multiple user terminals, namelyhow to decide the optimal allocation of subcarrier pair. We adopt sorted gain pairingmethod, and then considering the channel state to optimize the transmission power andsubcarrier pair, which can balance the user fairness and energy efficiency effectively.Finally, we simulate the actual communication scene, and then proposed a resourceallocation algorithm for single-user multi-relay OFDM two-way relay network. Due to thechannel estimation error and limited capacity of feedback link, estimation errors willaffect the quality of signal and system performance seriously. Therefore, we pay attentionto the imperfect CSI treatment. Compared to previous research, this algorithm can reducethe affection of the estimation error on system performance of energy efficiency. |
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