Phased array multiple area nulling antenna architecture
First Claim
1. An adaptive nulling communication system for nulling undesired signals from communication signals in multiple separate and distinct coverage areas having at least two separate and distinct primary coverage areas, said system comprising:
- phased array antenna means for receiving a plurality of signals, said phased array antenna means including a plurality of receiving elements for receiving said plurality of signals, each of said signals having a signal characteristic;
a plurality of first beam forming networks coupled to said phased array antenna means for providing signal coverage to said multiple separate and distinct coverage areas, each of said first beam forming networks coupled to each of said receiving elements;
distribution means for distributing a plurality of signals received from said multiple separate and distinct coverage areas;
a plurality of second beam forming networks coupled to said distribution means for nulling said undesired signals; and
a plurality of processors corresponding to at least the number of separate and distinct primary coverage areas for weighting and adjusting said plurality of second beam forming networks in response to said undesired signals, wherein said plurality of second beam forming networks nulls said undesired signals from said communication signals, each of said processors assigned to a separate and distinct coverage area of interest and each of said processors including characterizing means for identifying communication signals from an assigned coverage area of interest and for suppressing communication signals outside said assigned coverage area of interest based on said signal characteristics of said plurality of signals.
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Accused Products
Abstract
An adaptive nulling communication system for nulling undesired signals from communication signals in multiple separate and distinct coverage areas is disclosed. The adaptive nulling communication system includes a phased array antenna having multiple receiving elements to form a single aperture for receiving multiple signals. A first set of beam forming networks coupled to the phased array antenna forms the multiple separate and distinct coverage areas. A distribution network coupled to the first set of beam forming networks distributes the signals received from these coverage areas. A nulling processor having a second beam forming network coupled to the distribution network weights and adjusts the second beam forming network in response to the undesired signals to null these undesired signals from the communication signals.
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Citations
21 Claims
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1. An adaptive nulling communication system for nulling undesired signals from communication signals in multiple separate and distinct coverage areas having at least two separate and distinct primary coverage areas, said system comprising:
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phased array antenna means for receiving a plurality of signals, said phased array antenna means including a plurality of receiving elements for receiving said plurality of signals, each of said signals having a signal characteristic; a plurality of first beam forming networks coupled to said phased array antenna means for providing signal coverage to said multiple separate and distinct coverage areas, each of said first beam forming networks coupled to each of said receiving elements; distribution means for distributing a plurality of signals received from said multiple separate and distinct coverage areas; a plurality of second beam forming networks coupled to said distribution means for nulling said undesired signals; and a plurality of processors corresponding to at least the number of separate and distinct primary coverage areas for weighting and adjusting said plurality of second beam forming networks in response to said undesired signals, wherein said plurality of second beam forming networks nulls said undesired signals from said communication signals, each of said processors assigned to a separate and distinct coverage area of interest and each of said processors including characterizing means for identifying communication signals from an assigned coverage area of interest and for suppressing communication signals outside said assigned coverage area of interest based on said signal characteristics of said plurality of signals. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An adaptive nulling communication system for nulling undesired signals from communication signals in multiple separate and distinct coverage areas having at least two separate and distinct primary coverage areas, said system comprising:
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phased array antenna having a plurality of receiving elements forming a single aperture for receiving a plurality of signals, each of said signals having a signal characteristic; a plurality of first beam forming networks coupled to said phased array antenna, each of said first beam forming networks coupled to each of said receiving elements wherein each of said first beam forming networks forms multiple separate and distinct coverage areas; distribution network coupled to said plurality of first beam forming networks to distribute a plurality of signals received from said multiple separate and distinct coverage areas; and a plurality of nulling processors corresponding to at least the number of separate and distinct primary coverage areas, each of said nulling processors having a second beam forming network coupled to said distribution network, each of said nulling processors weights and adjusts a second beam forming network in response to said undesired signals to null said undesired signals from said communication signals, wherein each of said nulling processors includes characterizing means for suppressing users outside a coverage area of interest based on said signal characteristics of said plurality of signals. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for adaptively nulling undesired signals from communication signals in multiple separate and distinct coverage areas having at least two separate and distinct primary coverage areas, said method comprising the steps of:
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receiving a plurality of signals from a phased array antenna having a plurality of receiving elements forming a single aperture; coupling each of said receiving elements to each of a plurality of first beam forming networks; forming multiple separate and distinct primary coverage areas and offset coverage areas from said plurality of first beam forming networks; distributing a plurality of signals received in said primary coverage areas and said offset coverage areas to a plurality of second beam forming networks; weighting and adjusting said plurality of second beam forming networks in response to said undesired signals with a plurality of nulling processors corresponding to the number of separate and distinct primary coverage areas to null said undesired signals from said communication signals; assigning a separate and distinct primary coverage area of interest to each of said nulling processors; and characterizing said communication signals in each of said nulling processors based on signal characteristics to suppress communication signals outside said assigned coverage area of interest of each of said nulling processors. - View Dependent Claims (20, 21)
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Specification