Including the optimization method, downlink OFDMA cellular system, a wireless communication technology field: the collected direct channel gain and relay channel gain; the subcarriers to all users equally, and determine the corresponding to each subcarrier direct mode or relay mode, when the subcarrier adopts relay mode, the determination of the relay should be No. sub carrier; for all users are assigned downlink transmit power and for each subcarrier allocation respectively transmit power. The present invention assigns subcarriers to each user by maximizing the minimum rate of all users in the base station. For each subcarrier allocated to the user, the relay link is selected according to the channel gain, and compared with the direct link to determine which transmission mode is adopted. Finally, the total transmit power is assigned to the relay and each sub carrier in a certain way to improve the throughput of the system.
【技术实现步骤摘要】
【技术保护点】
一种下行OFDMA蜂窝系统的优化方法,其特征在于,包括如下步骤:步骤一:分别收集直传信道增益和中继信道增益;步骤二:将子载波平均分配给所有用户,并确定各子载波对应的直传模式或中继模式,当子载波采用中继模式,则确定对应该子载波的中继号;步骤三:为所有用户分别分配下行发射功率并为各个子载波分别分配发射功率。
【技术特征摘要】
【专利技术属性】
技术研发人员:郭佳,吴幼龙,林意如,罗汉文,俞晖,
申请(专利权)人:上海交通大学,
类型:发明
国别省市:31[中国|上海]
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