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提出了一种基于数字基带的载波泄漏与I/Q失配矫正方案.该方案只需在射频芯片上引入一条矫正通路,将载波泄漏与I/Q失配量检测出来发送给数字基带,数字基带完成矫正工作,减小了芯片面积和功耗,降低了设计难度.在TSMC 0.13μm CMOS工艺下,系统仿真结果表明,该矫正方案的载波泄漏误差小于1.5%,I/Q失配的相位与幅度矫正误差均小于6.5%.矫正链路的测试结果表明,I/Q幅度的不匹配体现在输入信号两倍的频率上,矫正链路的带宽为20MHz,链路增益变化范围为15dB,步长为5dB.
A scheme of carrier leakage and I / Q mismatch correction based on digital baseband is proposed.The scheme only needs to introduce a correction channel on the radio frequency chip to detect the carrier leakage and I / Q mismatch and send it to the digital baseband, The baseband is rectified, reducing the chip area and power consumption, and reducing the design difficulty.Under the TSMC 0.13μm CMOS process, the simulation results show that the carrier leakage error of the correction scheme is less than 1.5% and the I / Q mismatch phase And the error of amplitude correction are less than 6.5% .The test results show that the I / Q amplitude mismatch is reflected in the input signal twice the frequency of the correction link bandwidth of 20MHz, the link gain range of 15dB, Step size is 5dB.