摘要本文首先分析了自适应调制的原理, 它以频谱效率最高为准则, 在恒定功率约束条件下对接收信噪

比优化来选择不同调制阶数。然后引入时变多径信道模型, 通过仿真给出了自适应在此信道条件下的性能, 并分析

了信道估计误差对其性能的影响。

关键词自适应调制, 调制, 时变信道-Abstract This paper first analyzes the principle of adaptive modulation, spectral efficiency it up to standards, in the constant power constraint condition to receive a letter under the noise

Optimization to select different modulation than the order of. Then the introduction of time-varying multi-path channel model is given by simulation of adaptive channel conditions in this performance, and analyze the

The channel estimation error on their performance.

Key words adaptive modulation, modulation, time-varying channel