Abstract: The order statistic signal processor obtains continuing estimates of amplitude, phase, or frequency of an input signal based on order statistics. By way of definition, the P'th order statistic for a set of samples from a continuously distributed process is the P'th largest of the samples. Where a signal parameter fluctuates with time as a result of contamination by noise and interference and where the noise fluctuation rate is much greater than the rate at which changes in a signal parameter occur, an order statistic associated with a set of signal parameter samples can serve as an estimate of the signal parameter. The order statistic signal processor is based on an iterative process whereby the prior estimate of a signal parameter, i.e. amplitude or phase, is subtracted from each of a plurality of signal parameter samples obtained over a period of time. The differences are converted to quantities of fixed magnitude with signs corresponding to the differences.

Abstract: A multichannel coherent receiver employing multiple delay lines in series or a tapped delay line into which a received signal band is introduced. The signal band at each tap or increment of delay is mixed with individual related frequencies and the product from the mixers summed and further mixed with the output of a swept oscillator. The composite delayed signal band is introduced into a bank of dispersive filters followed by means for deriving in-phase and quadrature components. Signals contained within the signal band may then be detected resulting in coherent channelization, improved frequency resolution and full time coverage sampling.

Abstract: A multichannel coherent receiver employing multiple delay lines in series or a tapped delay line into which a received signal band is introduced. The signal band at each tap or increment of delay is mixed with individual related frequencies and the product from the mixers summed and further mixed with the output of a swept oscillator. The composite delayed signal band is introduced into a bank of dispersive filters followed by means for deriving in-phase and quadrature components. Signals contained within the signal band may then be detected resulting in coherent channelization, improved frequency resolution and full time coverage sampling.