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基于迭代的比特和功率分配机制,提出了一种低复杂度的比特和功率分配算法.与传统的迭代分配算法不同,该算法在每次迭代中只需要比较几个特定的子载波.该方法在保持传统迭代算法性能的前提下极大地减小了迭代分配算法的复杂度.此外,通过选择等功率分配方案作为初始方案加快了算法的收敛速度,进一步降低了算法复杂度.仿真结果表明,提出的改进算法在基本不牺牲系统性能的前提下有效地降低了算法复杂度.
Based on the iterative bit and power allocation mechanism, a low complexity bit and power allocation algorithm is proposed, which is different from the traditional iterative allocation algorithm in that it only needs to compare several specific subcarriers in each iteration. The complexity of the iterative algorithm is greatly reduced while maintaining the performance of the traditional iterative algorithm.In addition, the equal-power allocation scheme is selected as the initial scheme to speed up the convergence of the algorithm and further reduce the complexity of the algorithm.The simulation results show that, The proposed algorithm effectively reduces the complexity of the algorithm without sacrificing system performance.