We present a technique to jointly estimate the channel taps and the frequency offset due to the Doppler effect of a special class of doubly dispersive aeronautical channels. The algorithm includes the use of pulse repetition techniques at the transmitter and the “power method” subspace iteration at the receiver. We show that transmitting constant-amplitude zero-autocorrelation sequences for channel sounding yields estimators with low computational complexity. Numerical simulations indicate performance comparable to the estimation-theoretic lower bound.

中文翻译：

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空中无线通信的有效信道估计

由于一类特殊的双色散航空信道的多普勒效应，我们提出了一种联合估计信道抽头和频率偏移的技术。该算法包括在发射机使用脉冲重复技术和在接收机使用“功率方法”子空间迭代。我们表明，传输用于信道探测的恒定幅度零自相关序列产生具有低计算复杂性的估计器。数值模拟表明性能与估计理论下界相当。