For MQAM modulation, the optimized bit loading and power allocation were derived from a various-step greedy algorithm.
针对MQAM调制，采用变步长的贪婪算法得到优化的子信道比特加载及功率分配方案。
The algorithm, which involves adaptive sub-carrier allocation and bit loading with equally power allocation, adopts a grouping technique rather than the sub-carrier swapping.
算法使用分组代替迭代计算，摒弃复杂的子载波交换操作，以极低的复杂度实现了等功率下的自适应子载波分配和比特加载。
In order to further speed the algorithm, a rapid sub-optimal loading algorithm is also presented based on analyzing the bit loss superior limit of the method.
为了进一步提高算法的运算速度，在分析比特分配损失上限的基础上，提出一种快速的次优分配算法。
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