选择性发射 meaning in English

selective fire

And the direction of arrival ( doa ) estimation is an important aspect in the smart antenna research . whether in the separation of uplink multi - user signals or in the downlink selective launch , the measurement of user signal ’ s doa is the essential premise to realize the directional launch of smart antenna
其中波达方向( doa , directionofarrival )估计是智能天线研究的一个重要方面,无论是上行多用户信号的分离,还是下行选择性发射,对用户信号doa的测定,都成为智能天线实现指向性发射的必要前提。