초록 ▼

Prior art radar systems do not adapt the transmitted signal to avoid the interference bands but only filter the unadaptive receiver signal to eliminate the interference with resulting loss in detectability and distortion that in turn causes loss in resolution and increased ambiguity. The present inv

Prior art radar systems do not adapt the transmitted signal to avoid the interference bands but only filter the unadaptive receiver signal to eliminate the interference with resulting loss in detectability and distortion that in turn causes loss in resolution and increased ambiguity. The present invention allows a radar system to operate in an electromagnetic environment where co-channel narrow band interference is present, without loss of detectability, resolution and ambiguity. The present invention system adapts the radar transmitted signal so that its spectral energy is significant only in the interference free portions of the radar channel. It next adapts the receiver to detect this transmitted spectrum and then equalizes the signal by means of transversal equalizer coefficients to reduce distortions to the signal sidelobes.

대표청구항 ▼

A radar system for operating in an electromagnetic environment including in-band and out-of-band interferences, comprising: means for sampling the environment to provide a spectral electromagnetic profile representative of the environment; processor means for obtaining from the profile an optimal ch

A radar system for operating in an electromagnetic environment including in-band and out-of-band interferences, comprising: means for sampling the environment to provide a spectral electromagnetic profile representative of the environment; processor means for obtaining from the profile an optimal channel for the environment and for generating a receiver matched filter corresponding to the channel and equalizer coefficients from responsive pulses, the optimal channel having an optimum center frequency and maximum channel bandwidth with fewest in-band interferences; means for receiving an echo of a target signal transmitted to the environment; means for multiplying the frequency spectrum of the echo with the matched filter and for notching out the interferences in the frequency spectrum; means for transforming the interference free frequency spectrum into a responsive pulse to be transmitted to the processor means; wherein the processor means, using the responsive pulse, calculates transversal equalizer filter coefficients for reducing temporal sidelobes of the responsive pulse to effect an interference free signal having a desirable main lobe to sidelobe ratio.