초록 ▼

This invention relates to an improved signal processor that is insensitive to the type of clutter that is encountered by utilizing multiple parallel range sample intervals which vary in length from minimum to maximum so that the optimum sample size is provided for clutter or different range extents.

This invention relates to an improved signal processor that is insensitive to the type of clutter that is encountered by utilizing multiple parallel range sample intervals which vary in length from minimum to maximum so that the optimum sample size is provided for clutter or different range extents. By utilizing the correct range sample interval for the clutter, the detection threshold is accurately set as a result of an improved sample mean. The detection system includes a plurality of mean level processors operating in parallel in response to signal samples varying from minimum to maximum length in range and a selection circuit that selects the largest amplitude value of the clutter signal for use as the mean value in a signal comparator. When the mean value is the same for two or more sample sizes, one arrangement in accordance with the invention utilizes the larger sample size as the mean value.

대표청구항 ▼

A clutter processor for providing a signal threshold and responding to a source of video signals, the source receiving the video signals over a range distance comprising: an early and late plurality of detecting means coupled to said source of video signals, each early and late detecting means sampl

A clutter processor for providing a signal threshold and responding to a source of video signals, the source receiving the video signals over a range distance comprising: an early and late plurality of detecting means coupled to said source of video signals, each early and late detecting means sampling over a range interval of a different time interval from the other range intervals of the corresponding early and late detecting means to form a plurality of sample intervals, each plurality being respectively before and after the time of occurrence of a video signal, each detecting means determining a signal related to the clutter amplitude, and signal selection means coupled to said early and late plurality of detecting means for selecting as a function of amplitude one of the signals from said early or late detecting means related to the clutter amplitude as a threshold so as to substantially match the corresponding sample interval to the range interval of clutter.