To adapt the slow time-varying characteristics of some channel and meet the requirements of certain business for strict delay, an adaptive OFDM algorithm based on trace of dynamic partitioning sub-bands is proposed. The algorithm takes full advantage of slow time-varying channel, realizes the dynamic sub division quickly according to the frame channel state and the results of the previous frame sub-band division, and selects the same modulation for all sub-carriers adaptively. Simulation results show that, under the prem-ise of ensuring the transmission quality, the algorithm can effectively reduce the delay and the transmission of signaling information to improve spectrum utilization of the system while with low complexity.%针对某些信道的慢时变特性和某些对时延要求严格的业务需求，提出一种追踪子带动态划分OFDM自适应调制算法( TDS-OFDM)。该算法充分考虑信道的慢时变性，根据本帧的信道状态和前1帧子带划分的结果快速实现动态的子带划分，并自适应地为各子带中的所有子载波选择相同的调制方式。仿真结果表明，在保证传输质量的前提下，该算法复杂度低，能有效减小时延，减少信令信息的传递，提高系统的频谱利用率。
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