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AWR2243: 虚拟阵列

Part Number: AWR2243

请问对于远场窄带静止目标来说,由2发4收的实际天线虚拟成的1发8收的天线,这个时候的1发8收的虚拟接收天线接收到的信号X1和实际物理1发8收的物理接收天线接收到的信号X2会一模一样吗?我要是拿接收信号X2和 X1做DOA估计会有区别吗? 如果我想让【2发4收的实际物理天线-->1发8收的虚拟接收天线】实际效果完全等于【1发8收的实际物理天线】,怎么做能实现?