Wireless communication method and antenna system for determining direction of arrival information to form a three-dimensional beam used by a transceiver
First Claim
1. An antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, and forming beams in the determined direction, the system comprising:
- (a) two antenna arrays, each of the antenna arrays including a plurality of antenna elements;
(b) two first stage multi-mode-port matrices in communication with the two antenna arrays, each first stage multi-mode-port matrix including a plurality of interconnecting hybrids for processing azimuth beams;
(c) at least one second stage multi-mode-port matrix including a plurality of interconnecting hybrids for processing elevation beams; and
(d) a transceiver in communication with the second stage multi-mode-port matrix, wherein;
(i) the antenna arrays and the first stage multi-mode-port matrices form a plurality of orthogonal omni-directional modes,(ii) each of the modes has a characteristic phase set,(iii) two of the modes'"'"' phases are used to determine DOA in azimuth, and(iv) the second stage multi-mode-port matrix forms an elevation sum-mode and an elevation difference-mode such that DOA of the received signals can be determined in elevation, and beams can be formed in the direction of the received signals.
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Accused Products
Abstract
A wireless communication method and antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, (i.e., in three dimensions), to form a beam for transmitting and receiving signals. The system includes two antenna arrays, each having a plurality of antenna elements, two first stage multi-mode-port matrices, at least one second stage multi-mode-port matrix, an azimuth phase detector, an elevation amplitude detector, a plurality of phase shifters and a transceiver. The antenna arrays and the first stage multi-mode-port matrices form a plurality of orthogonal omni-directional modes. Each of the modes has a characteristic phase set. Two of the modes'"'"' phases are used to determine DOA in azimuth. The second stage multi-mode-port matrix forms a sum-mode and a difference-mode used to determine the DOA of the received signals in elevation. A beam is formed in the direction of the received signals by adjusting the phase shifters.
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Citations
36 Claims
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1. An antenna system for determining the direction of arrival (DOA) of received signals in azimuth and elevation, and forming beams in the determined direction, the system comprising:
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(a) two antenna arrays, each of the antenna arrays including a plurality of antenna elements; (b) two first stage multi-mode-port matrices in communication with the two antenna arrays, each first stage multi-mode-port matrix including a plurality of interconnecting hybrids for processing azimuth beams; (c) at least one second stage multi-mode-port matrix including a plurality of interconnecting hybrids for processing elevation beams; and (d) a transceiver in communication with the second stage multi-mode-port matrix, wherein; (i) the antenna arrays and the first stage multi-mode-port matrices form a plurality of orthogonal omni-directional modes, (ii) each of the modes has a characteristic phase set, (iii) two of the modes'"'"' phases are used to determine DOA in azimuth, and (iv) the second stage multi-mode-port matrix forms an elevation sum-mode and an elevation difference-mode such that DOA of the received signals can be determined in elevation, and beams can be formed in the direction of the received signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. In an antenna system including (i) two antenna arrays, (ii) two first stage multi-mode-port matrices in communication with the two antenna arrays, each first stage multi-mode-port matrix including a plurality of interconnecting hybrids for processing azimuth beams, (iii) at least one second stage multi-mode-port matrix including a plurality of interconnecting hybrids for processing elevation beams, and (iv) a transceiver in communication with the second stage multi-mode-port matrices, a wireless communication method for determining the direction of arrival (DOA) of received signals in azimuth and elevation, and forming beams in the determined direction, the method comprising:
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(a) the antenna arrays and the first stage multi-mode-port matrices forming a plurality of orthogonal omni-directional modes, each mode having a characteristic phase set, where two of the modes'"'"' phases are used to determine DOA in azimuth; and (b) the second stage multi-mode-port matrix forming an elevation sum-mode and an elevation difference-mode such that the DOA of the received signals can be determined in elevation, and beams can be formed in the direction of the received signals. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification