Abstract: A multi-static radar system provides surveillance. The radar system includes a plurality of radar receivers and a plurality of radar transmitters arranged in a multi-static configuration to form at least one radar cell to provide an area of radar coverage within the cell.

Abstract: A radar system provides information relating to a three-dimensional field of surveillance (FoS) having a volume exceeding one cubic kilometre. The radar system includes a radar transmitter and radar receiver arranged to provide persistent surveillance of the FoS. Each radar return signal received within a sequence of time periods is processed. An associated signal information is stored in a memory in association with information identifying at least one of a respective beam in which that return signal was received and a respective receiver element at which that respective return signal was received.

Abstract: A radar system for discriminating between sources of radar interference and targets of interest. The system includes a transmitter for transmitting radar signals into a region, a receiver for receiving return signals of the radar signals returned from within the region, and a processor for processing the return signals to discriminate between return signals returned from a first object and return signals returned from a second object where the return signals from the second object comprise both zero and non-zero Doppler components and interfere with the return signals from the first object. The radar system is operable for discriminating between the return signals when the return signals are received at a distance from the second object which is less than a proximity limit based on the geometry of the object.

Abstract: A multi-static radar system provides surveillance. The radar system includes a plurality of radar receivers and a plurality of radar transmitters arranged in a multi-static configuration to form at least one radar cell to provide an area of radar coverage within the cell.