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OFDM(正交频分复用)技术是第三代、第四代移动通信的关键技术之一,而移动信道是极为复杂的一种信道,信号通过无线信道时,会遭受各种衰落的影响,信道估计技术就是使得信道对输入信号的影响减至最小化的估计算法。在介绍了OFDM系统相干检测下信道估计方法的基础上,着重讨论和仿真了利用导频插入的方式对OFDM系统进行信道估计的算法。
OFDM (Orthogonal Frequency Division Multiplexing) technology is one of the key technologies of the third generation and fourth generation mobile communications. The mobile channel is an extremely complicated channel. When the signal passes through the wireless channel, it will suffer various fading effects The channel estimation technique is an estimation algorithm that minimizes the effects of the channel on the input signal. After introducing the channel estimation method of coherent detection of OFDM system, the algorithm of channel estimation using OFDM is emphatically discussed and simulated.