The direct-path-interference suppression methods such as transmit nulling and sidelobe cancellation are inapplicable because the energy is radiated isotropiclly and the receive platform is moving.

• 由于发射站全方位辐射能量以及接收平台运动，不能直接采用已有的如发射置零、旁瓣对消等技术来抑制直达波。