Frequency diversity sidelobe canceller
First Claim
1. An interference suppression system for cancelling interference in a frequency agile signal receiving system comprising:
- main channel sensor means for receiving desired and interference signals;
at least one auxiliary channel sensor means for receiving primarily interference signals;
first canceller means coupled to said main channel sensor means and said at least one auxiliary channel sensor means for cancelling interference from said main channel signals and providing a first main channel output;
second canceller means coupled to said main channel sensor means and said at least one auxiliary channel sensor means for cancelling interference from said main channel signals and providing a second main channel output; and
means coupled to said first and second canceller means for alternately controlling said first and second canceller means to receive said sensor means signals at different frequencies.
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Accused Products
Abstract
A new system and technique for cancelling interference in frequency agile ceiving systems. Main and auxiliary signals are supplied to a pair of multiple loop side-lobe cancellers which are capable of being tuned to different frequencies. At the same time, under the control of a timing clock, plural frequencies are selected and multiplexed between two channels at the time of a radar pulse transmission. The side-lobe cancellers and radar are coupled to the channels such that each caneller operates at a given frequency for two consecutive pulse periods, with the radar transmitting at said given frequency during the second pulse period. By continuously cycling between the two channels, each canceller is operating at the proper frequency to cancel interference even though the radar is changeing frequency on a pulse to pulse basis.
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Citations
7 Claims
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1. An interference suppression system for cancelling interference in a frequency agile signal receiving system comprising:
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main channel sensor means for receiving desired and interference signals; at least one auxiliary channel sensor means for receiving primarily interference signals; first canceller means coupled to said main channel sensor means and said at least one auxiliary channel sensor means for cancelling interference from said main channel signals and providing a first main channel output; second canceller means coupled to said main channel sensor means and said at least one auxiliary channel sensor means for cancelling interference from said main channel signals and providing a second main channel output; and means coupled to said first and second canceller means for alternately controlling said first and second canceller means to receive said sensor means signals at different frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification