The working sketch of the system is shown in Fig.2. It is mainly composed of two subsystems, the transmit subsystem and receive subsystem. They operated in a MISO mode. The transmit subsystem mainly consists of a large coast–located antenna array (see Fig.3a), and each of them transmits signals of different carrier frequencies to cover a rather large sector (the coverage of the experimental system can reach 120°). The receiving subsystem uses a small ship-carried omnidirectional antenna (see Fig.3b). It does not form beam pattern in the view of power but it can use digital beamforming (DBF) at the receiver to form a transmit beam pattern. And there can be multiple ship–carried receivers so long as these receivers can obtain echoes of targets. In this way the system behaves like a broadcasting radar. Also the working mode of the bistatic radar has the advantage of reducing the ionospheric disturbance.