Patent ID: 11953580
Assignee: THE UNIVERSITY OF BIRMINGHAM
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A relocatable over-the-horizon-radar (OTHR) system comprising:
a transmitting system having an antenna comprising a plurality of antenna elements;
a plurality of receiving systems each having a plurality of antenna elements fewer in number than the plurality of antenna elements of said transmitting system;
a network controller; and
a frequency management system;
wherein the transmitting system is configured to transmit mutually orthogonal signals on each antenna element,
wherein the frequency management system is configured to determine one or more transmit frequencies for the mutually orthogonal signals by minimizing an optimum frequency cost function to identify which one or more transmit frequencies cause the mutually orthogonal signals to propagate to a target and to a maximal number of said receiving systems;
wherein the plurality of receiving systems is configured to decode the orthogonal signals to synthesize beams and to determine a target elevation and azimuth relative to the transmitting system from the synthesized beams, and
wherein the transmitting system, the plurality of receiving systems and the network controller are networked together,
wherein the plurality of antenna elements of each receiving system comprises between one and ten antenna elements; and
wherein one or more of the plurality of receiving systems is a mobile, land-based receiving system.