| 摘要 |
A system for directionally classifying of a radio signal originating from an emitter. The system includes a receiving-station, which includes at least two antennas, a single-channel-receiver producing a first and a second received signals and a switch alternately coupling each of the antennas with the single-channel-receiver. The system further includes another receiving-station which includes another receiver, producing another received signal, coupled with a first other antenna. The system further includes directional-classifier which includes a phase-difference-detector, coupled with the single-channel-receiver and with said another receiver. The phase-difference-detector produces a first phase difference measurement when the switch couples one antenna with the single-channel-receiver. The phase-difference-detector further produces a second phase-difference-measurement when the switch couples the other antenna with the single-channel-receiver. The directional classifier subtracts the second phase-difference-measurement from the first-phase-difference measurement producing a phase-difference-estimate. The receiving station and the other receiving station are in relative motion one with respect to the other. |
| 主权项 |
1. A system for directionally classifying of a radio signal originating from an emitter, said system comprising:
a receiving station including:
a switch, including at least two input ports and at least one output port, said switch alternately coupling each of said at least two input ports with said output port;an antenna, coupled with a respective one of said at least two input ports, receiving at least a radio signal originating from said emitter and producing a first electric received signal;at least a second antenna, coupled with a respective another one of said at least two input ports, receiving at least said radio signal originating from said emitter and producing a second electric received signal; anda single channel receiver, coupled with said output port of said switch, performing reception operations on said first electric received signal and on said second electric received signal and producing a first and a second received signals respectively; at least one other receiving station including:at least a first other antenna, receiving respective said radio signal originating from said emitter and producing another electric received signal;another receiver, coupled with said at least first other antenna, performing reception operations on said another electric signal produced by said first other antenna and producing another received signal; and a directional classifier, including a phase difference detector, coupled with said single channel receiver and with said another receiver, said phase difference detector measuring a first phase difference between said first received signal and said another received signal when said switch couples said antenna with said single channel receiver, producing a first phase difference measurement, said phase difference detector further measuring a second phase difference between said second received signal and said another received signal when said switch couples said second antenna with said single channel receiver, producing a second phase difference measurement, said directional classifier subtracts said second phase difference measurement from said first phase difference measurement producing a phase difference estimate, wherein said receiving station and said at least one other receiving station are in relative motion one with respect to the other. |
