An analog channel calibration method for bandwidth interleave

The concept of bandwidth interleave is splitting a wideband signal into several narrow band signals. Based on this architecture, a wideband signal can be generated by several DACs with low sampling rate. However, the overlap of filters deteriorates the output signal. To eliminate the distortion, the mathematical model of the channel frequency response is constructed in this paper. The distortion of output signal is analyzed and an analog channel calibration method is proposed. Adopted with this method, the distortion of output signal can be eliminated by pre-distorting the input signal with the calibration matrix in frequency domain. Experiment results show the effectiveness.