Abstract: A first multitude of frequency elements between a first lower frequency and a first upper frequency; and a second multitude of frequency elements between a second lower frequency and a second upper frequency are transmitted. The second lower frequency and the second upper are shifted from the first upper frequency by the first delta, respectively, by a delta frequency. A return signal is split into: a first return signal comprising a first in-phase component and a first quadrature phase component; and a second return signal comprising a second in-phase component and a second quadrature phase component. A combined return signal is generated by combining the first return signal and the second return signal phase shifted by the first delta frequency. A probability of a potential target is determined when the combined return signal exceeds a threshold.

Abstract: A first frequency agile waveform and additional frequency agile signal waveform(s) having in-phase and a quadrature phase components, each shifted by a different delta frequency, are transmitted in the direction of a possible dispersive target. Return signal(s) each comprising an in-phase component and a quadrature phase component associated with each of the frequency agile waveform(s) are received. The return signal(s) associated with the frequency agile signal waveform(s) are phase shifted by their respective delta frequenc(ies). A combined return signal is generated by combining the first return signal and the additional phase shifted return signal(s). A probability of a potential target is determined when the combined return signal exceeds a threshold.

Abstract: A first frequency agile waveform and additional frequency agile signal waveform(s) having in-phase and a quadrature phase components, each shifted by a different delta frequency, are transmitted in the direction of a possible dispersive target. Return signal(s) each comprising an in-phase component and a quadrature phase component associated with each of the frequency agile waveform(s) are received. The return signal(s) associated with the frequency agile signal waveform(s) are phase shifted by their respective delta frequenc(ies). A combined return signal is generated by combining the first return signal and the additional phase shifted return signal(s). A probability of a potential target is determined when the combined return signal exceeds a threshold.