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关于6670的FFT模块中,LTE Frequency shift 的几个寄存器有些疑问



在网上找了一下相关的解答,其他几个寄存器都明白了,只是 SHIFT_DIR 和 SHIFT_PHASE 这两个,user guid 里也没有找到相关的说明,不知道这两个寄存器是根据什么来确定的呢?

谢谢