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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。
Aiming at the problem of power allocation between source user and cooperating user in virtual MIMO (V-MIMO), an interval search algorithm based on source user power allocation is given. The algorithm rapidly searches for users who do not need to participate in the collaboration and transforms the solution process of the equations in the process of iterative water injection power allocation into the interval search of the power users of the source user, greatly reducing the complexity of the algorithm. The simulation results under Rayleigh channel show that compared with the average power allocation algorithm, the performance of the cooperative capacity is improved remarkably. Compared with the optimal power allocation algorithm, the proposed algorithm has the same performance and improves the overall performance of the system.