METHOD IN A WIRELESS REPEATER EMPLOYING AN ANTENNA ARRAY INCLUDING VERTICAL AND HORIZONTAL FEEDS FOR INTERFERENCE REDUCTION
First Claim
1. A method to reduce interference in an echo cancellation repeater for a wireless communication network, the repeater employing a first antenna array and a second antenna array, each antenna array including a first set of antenna elements for vertical feed mode and a second set of antenna elements for horizontal feed mode, the method comprising:
- (a) selecting a combination of antenna elements from the first and second antenna arrays;
(b) receiving incoming receive signals on receiver circuits associated with the selected antenna elements;
(c) generating correlation energy measurements indicative of correlation of the receive signals and one or more reference signals;
(d) selecting a desired receive signal being a receive signal with the largest correlated energy level, excluding receive signals that are feedback signals of the repeater;
(e) calculating antenna weights for the selected antenna elements using one of an error minimizing algorithm and an adaptive metric optimization algorithm;
(f) determining a performance result associated with the selected combination of antenna elements;
(g) storing calculated antenna weights and the performance result associated with the selected combination of antenna elements;
(h) repeating steps (a) to (g) for one or more combinations of antenna elements from the first and second antenna arrays; and
(i) selecting a combination of antenna elements from the first and second antenna arrays based on the stored performance results.
1 Assignment
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Accused Products
Abstract
An echo cancellation wireless repeater with first and second antenna arrays having vertical and horizontal feed antenna elements selects a combination of antenna elements for reception and transmission to reduce interference and improve the quality of signal reception. In one embodiment, the antenna elements are switchably connected to transceiver circuits and a combination of antenna elements is selected based on the best desired performance result. In another embodiment, the antenna elements are each connected to its own transceiver circuit and the echo cancellation repeater performs beamforming in baseband to select a combination of antenna elements.
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Citations
49 Claims
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1. A method to reduce interference in an echo cancellation repeater for a wireless communication network, the repeater employing a first antenna array and a second antenna array, each antenna array including a first set of antenna elements for vertical feed mode and a second set of antenna elements for horizontal feed mode, the method comprising:
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(a) selecting a combination of antenna elements from the first and second antenna arrays; (b) receiving incoming receive signals on receiver circuits associated with the selected antenna elements; (c) generating correlation energy measurements indicative of correlation of the receive signals and one or more reference signals; (d) selecting a desired receive signal being a receive signal with the largest correlated energy level, excluding receive signals that are feedback signals of the repeater; (e) calculating antenna weights for the selected antenna elements using one of an error minimizing algorithm and an adaptive metric optimization algorithm; (f) determining a performance result associated with the selected combination of antenna elements; (g) storing calculated antenna weights and the performance result associated with the selected combination of antenna elements; (h) repeating steps (a) to (g) for one or more combinations of antenna elements from the first and second antenna arrays; and (i) selecting a combination of antenna elements from the first and second antenna arrays based on the stored performance results. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A repeater for a wireless communication network, the repeater employing echo cancellation and employing a first antenna array and a second antenna array, each antenna array including a first set of antenna elements for vertical feed mode and a second set of antenna elements for horizontal feed mode, the repeater comprising:
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one or more switches, each switch being coupled to two or more antenna elements in each of the first and second antenna arrays, the one or more switches being configured to select one of the two or more antenna elements coupled thereto; receiver circuits coupled to the one or more switches to receive incoming receive signals associated with the selected antenna elements; an antenna element selection module and an antenna weight computation module configured to select one or more combinations of antenna elements, to perform calculations of antenna weights for each selected combination of antenna elements, to determine a performance result associated with each selected combination of antenna elements, and to select a combination of antenna elements from the first and second antenna arrays based on the performance results; and an antenna weight application module configured to apply the calculated antenna weight to condition the receive signals. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A computer readable medium having stored thereon computer executable instructions for performing at least the following acts:
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(a) selecting a combination of antenna elements from first and second antenna arrays of an echo cancellation repeater, each antenna array including a first set of antenna elements for vertical feed mode and a second set of antenna elements for horizontal feed mode; (b) receiving incoming receive signals on receiver circuits associated with the selected antenna elements; (c) generating correlation energy measurements indicative of correlation of the receive signals and one or more reference signals; (d) selecting a desired receive signal being a receive signal with the largest correlated energy level, excluding receive signals that are feedback signals; (e) calculating antenna weights for the selected antenna elements using one of an error minimizing algorithm and an adaptive metric optimization algorithm; (f) determining a performance result associated with the selected combination of antenna elements; (g) storing calculated antenna weights and the performance result associated with the selected combination of antenna elements; (h) repeating steps (a) to (g) for one or more combinations of antenna elements from the first and second antenna arrays; and (i) selecting a combination of antenna elements from the first and second antenna arrays based on the stored performance results.
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41. A repeater for a wireless communication network, the repeater employing echo cancellation and employing a first antenna array and a second antenna array, each antenna array including a first set of antenna elements for vertical feed mode and a second set of antenna elements for horizontal feed mode, the repeater comprising:
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means coupled to each set of two or more antenna elements in each of the first and second antenna arrays, the means for selecting one of the two or more antenna elements coupled thereto; means for receiving incoming receive signals associated with the selected antenna elements; means for selecting one or more combinations of antenna elements, performing calculations of antenna weights for each selected combination of antenna elements, determining a performance result associated with each selected combination of antenna elements, and selecting a combination of antenna elements from the first and second antenna arrays based on the performance results; and means for applying the calculated antenna weight to condition the receive signals.
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42. A method to reduce interference in an echo cancellation repeater for a wireless communication network, the repeater employing a first antenna array and a second antenna array, each antenna array including a first set of antenna elements for vertical feed mode and a second set of antenna elements for horizontal feed mode, the method comprising:
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(a) receiving incoming receive signals on receiver circuits associated with the antenna elements; (b) generating correlation energy measurements indicative of correlation of the receive signals and one or more reference signals; (c) selecting a desired receive signal being a receive signal with the largest correlated energy level, excluding receive signals that are feedback signals of the repeater; (d) calculating antenna weights for the antenna elements using one of an error minimizing algorithm and an adaptive metric optimization algorithm; (e) determining a performance result associated with the antenna elements; (f) performing beamforming in baseband to adjust the calculated antenna weights, the adjusted antenna weights selecting a combination of antenna elements from the first and second antenna arrays for receiving and transmitting signals; and (g) performing echo cancellation on the receive signal or on a weighted combined receive signal using the calculated antenna weights. - View Dependent Claims (43, 44, 45)
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46. A repeater for a wireless communication network, the repeater employing echo cancellation and employing a first antenna array and a second antenna array, each antenna array including a first set of antenna elements for vertical feed mode and a second set of antenna elements for horizontal feed mode, the repeater comprising:
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receiver circuits coupled to receive incoming receive signals associated with the antenna elements; an antenna element selection module and an antenna weight computation module configured to perform calculations of antenna weights for the antenna elements, to determine a performance result associated with the antenna elements, and to select a combination of antenna elements from the first and second antenna arrays based on the performance results; an antenna weight application module configured to apply the calculated antenna weight to condition the receive signals; and an echo canceller configured to cancel estimated feedback signals from the receive signals or from a weighted combined receive signal using the calculated antenna weights. - View Dependent Claims (47, 48, 49)
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Specification