Narrow beam antenna systems with angular diversity
First Claim
1. A receiving system comprising:
- at least one antenna providing a plurality of antenna beams, said plurality of beams disposed for providing angular diversity between corresponding received signals;
a first processing branch for processing a first plurality of signals appearing within a first selected plurality of said antenna beams, said first processing branch comprising;
a plurality of delay paths, each said delay path receiving a one of said first plurality of signals from a corresponding one of said first selected plurality of antenna beams and introducing a preselected amount of delay thereto, said preselected amount of delay proportionate to said corresponding one of said beams; and
a combiner for combining said first plurality of signals after output from said plurality of delay paths;
a second processing branch for processing a second plurality of signals appearing within a second selected plurality of said antenna beams, said second processing branch comprising;
a plurality of delay paths, each said delay path receiving a one of said second plurality of signals from a corresponding one of said second plurality of antenna beams and introducing a preselected amount of delay thereto, said preselected amount of delay proportionate to said corresponding one of said beams; and
a combiner for combining said second plurality of signals after output from said plurality of delay paths; and
a receiver having a first port coupled to an output of said first processing branch and a second port coupled to said second processing branch.
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Accused Products
Abstract
A receiving system 100 is disclosed which includes at least one antenna 101 providing a plurality of antenna beams. A first processing branch 103 is included for processing a first plurality of signals appearing within a first plurality of the antenna beams. The first processing branch 103 includes a plurality of delay paths 105 each receiving a one of the first plurality of signals from a corresponding one of the first plurality of antenna beams and applying a predetermined amount of delay thereto, the preselected amount of delay proportionate to the corresponding one of the beams. First processing branch 103 further includes a combiner 106 for combining the first plurality of signals after output from the plurality of delay paths 105. A second processing branch 104 is provided for processing a second plurality of signals appearing within a second plurality of the antenna beams. Second processing branch 104 includes a plurality of delay paths 105, each delay path receiving one of the second plurality of signals from a corresponding one of the second plurality of antenna beams and applying a pre-selected amount of delay thereto, the pre-selected amount of delay being proportionate to the corresponding one of the beams. Second processing branch 104 further includes a combiner 106 for combining the second plurality of signals after output from the plurality of delay paths 105. Finally, a receiver 102 is provided having a first port coupled to an output of first processing branch 103 and a second port coupled to a second processing branch 104.
80 Citations
34 Claims
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1. A receiving system comprising:
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at least one antenna providing a plurality of antenna beams, said plurality of beams disposed for providing angular diversity between corresponding received signals; a first processing branch for processing a first plurality of signals appearing within a first selected plurality of said antenna beams, said first processing branch comprising; a plurality of delay paths, each said delay path receiving a one of said first plurality of signals from a corresponding one of said first selected plurality of antenna beams and introducing a preselected amount of delay thereto, said preselected amount of delay proportionate to said corresponding one of said beams; and a combiner for combining said first plurality of signals after output from said plurality of delay paths; a second processing branch for processing a second plurality of signals appearing within a second selected plurality of said antenna beams, said second processing branch comprising; a plurality of delay paths, each said delay path receiving a one of said second plurality of signals from a corresponding one of said second plurality of antenna beams and introducing a preselected amount of delay thereto, said preselected amount of delay proportionate to said corresponding one of said beams; and a combiner for combining said second plurality of signals after output from said plurality of delay paths; and a receiver having a first port coupled to an output of said first processing branch and a second port coupled to said second processing branch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A receiving system:
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a CDMA receiver; a multibeam antenna providing a plurality of reception beams, each said beam having a separate angular coverage; a first plurality of delay paths coupling said multibeam antenna with a sector input port of said receiver, each of said first plurality of delay paths introducing a predetermined amount of delay to a signal received from a corresponding one of a first set of said plurality of beams; and a second plurality of delay paths coupling said multibeam antenna with a diversity input port of said receiver, each of said second plurality of delay paths introducing a predetermined amount of delay to a signal received from a corresponding one of a second set of said plurality of beams. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A receiving system comprising:
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a plurality of antennas, said antennas disposed to provide angular diversity between signals received thereon; first mixing circuitry coupled to an output of selected ones of said antennas for mixing down signals received by said selected ones of said antennas; a plurality of delay devices coupled to said mixing circuitry for delaying a mixed down signal received by a corresponding one of said selected ones of said antennas by a predetermined amount; second mixing circuitry coupled to said delay devices for up mixing delayed signals output from said delay devices; first signal combining circuitry for combining delayed signals output from said second mixing circuitry; and second signal combining circuitry for combining delayed combined signals output from said first signal combining circuitry with an undelayed signal received from at least one of said plurality of antennas. - View Dependent Claims (25, 26)
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27. A method of receiving signals from a plurality of mobile communicating devices and for presenting received ones of said signals to the sector and diversity inputs of a signal receiver, said method including the steps of:
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angularly spacing a plurality of antenna beams across a sector in which signals are expected to be received, each antenna beam having a narrow beam width; dividing the signals received on all of the beams in half so that half of the received signals are processed by a first set of delays and the remaining half of the signals are processed by a second set of delays; delaying each of the signals in the respective sets by a different delay time; and summing all of the signals processed by each delay set together to form two signal sets, one set for presentation to the sector input and one set for presentation to the diversity input of the signal receiver. - View Dependent Claims (28, 29, 30, 31)
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32. An antenna system for receiving signals from a plurality of mobile communicating devices and for presenting received ones of said signals to the sector and diversity inputs of a signal receiver, said system comprising:
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a plurality of antenna beams spaced angularly across a sector in which signals are expected to be received, each antenna beam having a narrow beam width; means for dividing the signals received from all of the beams in half so that half of the received signals are processed by a first set of delays and the remaining half of the signals are processed by a second set of delays; means for delaying each of the signals in the respective sets by a different preset delay time; and means for summing all of the signals processed by each delay set together to form two signal sets, one set for presentation to the sector input and one set for presentation to the diversity input of the signal receiver. - View Dependent Claims (33, 34)
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Specification