Patent ID: 6473596
Filing Date: 2002-10-29
Classification: H04B

Abstract:
The method of receiving in a movable vehicle a weaker desired radio frequency signal in the presence of a same vehicle originating, adjacent frequency, strong interference signal, said method comprising the steps of:generating a first electrical signal having both said weaker desired radio frequency signal and said same vehicle originating adjacent frequency strong interference signal as components thereof; forming, in a first electrical signal-connected first path processing, a second electrical signal in which said weaker desired radio frequency signal component is attenuated by a signal amplitude-responding, threshold effect inclusive, yttrium iron garnet ferrite element with respect to said same vehicle originating adjacent frequency strong interference signal component; subtracting, in a first electrical signal-connected second path processing, said second electrical signal from said first electrical signal to form a third electrical signal of subtraction altered suppressed same vehicle originating adjacent frequency strong interference signal content and less altered weaker desired radio frequency signal content; applying said third electrical signal of subtraction altered suppressed same vehicle originating adjacent frequency strong interference signal content and less altered weaker desired radio frequency signal content to an input port of a radio receiver apparatus; said generating, forming and subtracting steps being accomplished in non-saturating gain-free large dynamic range signal processing preceding said radio receiver apparatus.