摘要
针对虚拟MIMO(V-MIMO)中源用户与协作用户间的功率分配问题,给出了一种基于源用户功率分配因子的区间搜索算法。该算法通过快速寻找不需要参与协作的用户,将迭代注水功率分配过程中的方程组求解过程转化为源用户功率因子的区间搜索,大大降低了算法的复杂度。瑞利信道下的仿真结果表明,该算法与平均功率分配算法相比,协作容量性能提高显著,与最优功率分配算法相比,性能相当,从整体上提高了系统的性能。
An algorithm based on channel state preelection is proposed, thus to optimize the power allocation between source and cooperative users in the Virtual-MIMO. By quickly finding the users not to participate in the cooperation, this algorithm turns the solution of equations in the iterative water filling power allocation into the search of power allocation factor of source users, thus to greatly reduce its complexity. Simulation results under Rayleigh fading conditions indicate that, compared with the average power allocation algorithm, the proposed algorithm could greatly increase the cooperative capacity, while compared with the best power allocation algorithm, has a well matched performance, thus the overall system performance is remarkably improved.
出处
《通信技术》
2012年第7期81-83,96,共4页
Communications Technology
关键词
V-MIMO
协作用户
功率分配
信道状态预选
Virtual MIMO
cooperative user
power allocation
channel state preelection
