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针对正交频分多址接入无线网络的下行链路,提出了一种计算量少、能够依据信道状态信息进行动态资源分配、满足多个用户服务质量要求的算法.该方法首先假设各个用户发射功率相同,按比例分配子载波,然后按照每个用户最小速率需求,确定各个用户最小发射功率,最后根据总功率大小以及用户所需最小发射功率,最大化整个系统容量.分析表明该方法可以得到接近最优的发射功率,资源调度策略具有多项式复杂度,仿真结果验证了理论的正确性,算法能够在短时间内进行子载波分配和功率控制,满足无线通信实时性要求.
Aiming at the downlink of Orthogonal Frequency Division Multiple Access (WDM) wireless network, a new algorithm is proposed which can calculate the dynamic resource allocation based on channel state information and meet the QoS requirements of multiple users with less computational load. This method first assumes that each user The same transmit power and sub-carriers are proportionally allocated, and then the minimum transmit power of each user is determined according to the minimum rate requirement of each user, and finally the total system capacity is maximized according to the total power and the minimum transmit power required by the user. The analysis shows that the method can Get close to the optimal transmit power, resource scheduling strategy with polynomial complexity, simulation results verify the correctness of the theory, the algorithm can be in a short period of subcarrier allocation and power control to meet the real-time wireless communications requirements.