下行多用户CoMP系统资源分配算法

针对下行多用户多点协作传输系统(MU-CoMP)边值自适应(MA)的问题,提出了一种快速资源分配算法。该算法首先根据用户的速率要求及平均信道增益估计出每个用户需要的子载波数目,在此基础上设计合理的子载波分配算法进行子载波分配,通过预判并且剔除不适合传输数据的较差空间子信道实现快速比特加载。仿真结果表明,所提算法在满足用户最低速率和误码率要求的前提下有效地降低了总发射功率,以较低的复杂度获得了接近最优算法的性能。

Resource allocation algorithm for downlink multiuser CoMP system

For downlink multiuser coordinated multi-point transmission (MU-CoMP) system, a fast resource allocation algorithm was proposed to solve the margin adaptive (MA) problem. Firstly the algorithm estimated the number of subcarriers for each user based on its average channel gain and minimal-rate requirement, and then an efficient algorithm was designed to complement subcarrier allocation. At last, fast bit-loading was achieved through pre-determining and removing the inefficient spatial subchannels. Simulation results show that the proposed algorithm decreases the total transmit power with both the minimal-rate and bit error rate requirements satisfied, and obtains near-optimal performance with less complexity, compared with the optimal algorithm.