在AWR1642的接收模块中,I路和Q路与本振混频后,应该会产生直流偏置问题,想问一下第一个高通滤波器是不是为了解决直流偏置问题·

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这个不是为了滤除直流信号,要滤除直流信号的话,可以参考下面的帖子。
https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/620563/awr1642-bpf-to-remove-the-dc-noise-in-analog-if-stage
是通过软件完成的。下面是cacibDCRangeSig算法说明。
https://e2e.ti.com/support/sensors-group/sensors/f/sensors-forum/935066/awr1243-implementing-calibdcrangesig-algorithm