时变信道OFDM系统一种改进的连续ICI消除法

An improved successive ICI cancellation for OFDM system in time varying channels

提出了一种改进的连续子信道间干扰(ICI)消除法,有效地消除OFDM信号在时变信道下产生的ICI。该方法检测出每一子信道上的数据后,立即估计并消除该数据对其他所有子信道产生的ICI,因此提高了下一子信道的检测精度。在Jakes模型产生的时变信道下进行仿真,结果表明,与传统的并行ICI消除法在迭代次数和运算量相同条件下,本算法具有较快的收敛性和较高的性能。

An improved successive Interchannel Interference （ICI） cancellation method is proposed to cancel ICI, which is eaused by time varying channel for OFDM System. Using this method, once the symbol on each subchannel is detected, ICI caused by that symbol is estimated and eliminated immediately, so the detection accuracy for the next subchannel is increased. Simulation for this method is performed in a time varying channel, which is generated by Jokes model. With the same iterations and computation, simulation results show that the successive ICI cancellation method has a faster convergence and higher performance than the traditional parallel ICI cancellation method.