Research on Adaptive OFDM Algorithm Based on Trace of Dynamic Partitioning Sub-bands

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 premise 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.