To reduce the computational complexity, adaptive beamform vector and adaptive bit loading are designed separately. A modified sphere interpolation algorithm is used to reduce the feedback bits for large number of subcarrier.
为了降低计算复杂度,在接收端对波束矢量与比特加载实现分离自适应设计并反馈量化后的信息;对于子载波数比较大的情况,为了有效降低反馈比特数,利用了修正的球形插补算法;仿真验证了算法可以在低反馈比特下保证系统性能。
参考来源 - 非理想反馈下闭环MIMO系统的关键技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
OFDM系统的自适应比特加载和功率分配程序，运行OFDM。
M-OFDM system of adaptive bit load and power distribution, the running OFDM.
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。
For MQAM modulation, the optimized bit loading and power allocation were derived from a various-step greedy algorithm.
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。
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.
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