块间根据率失真曲线对比特分配进行合理优化。

Then a optimizing method based on rate-distortion curve is used to make reasonable bit-allocation among the blocks.

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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.

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通过对OFDM的子信道比特分配空间进行分析，本文提出着眼于误比特概率梯度的动态lms算法和全局优化算法。

In this paper, dynamical LMS algorithm and global optimization algorithm, with a view to gradient of error probability, are proposed based on analysis of sub-carries allocation space for OFDM system.

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