关键词: 正交频分多址, 功率分配, 小区间干扰, 干扰协调

Abstract:

In order to coordinate the inter-cell interference, a multicell adaptive power allocation scheme was proposed for downlink orthogonal frequency division multiple access (OFDMA) cellular systems. In order to coordinate transmit power in co-subchannels, the difference of signal to interference plus noise ratio(SINR) between co-subchannels of adjacent cells was used to balance SINR. Then the scheme would be able to improve the edge users’ performance, reduce the interference in co-subchannels of adjacent cells and improve the radio resource utility. Simulation results show that the scheme could balance the performance of the system and ensure the throughput of the system.

Key words: orthogonal frequency division multiple access, power allocation, inter-cell interference, interference coordination