Communications systems including adaptive antenna systems and methods for inter-system and intra-system interference reduction
First Claim
1. A method of generating a downlink transmission signal from a base transceiver system to a user terminal associated with the base transceiver system, comprising:
- obtaining location information for a transceiver of an independent communications system not associated with the base transceiver system;
generating complex transmitting weights for an adaptive antenna associated with the base transceiver system that form a spatial null directed at the transceiver of the independent communications system; and
transmitting a downlink communications signal over the adaptive antenna system to the user terminal using the complex transmitting weights;
wherein obtaining location information for the transceiver of the independent communications system comprises receiving a beacon signal from the transceiver of the independent communications system; and
wherein generating the complex transmitting weights comprises;
forming a uplink antenna pattern using the complex transmitting weights;
receiving the beacon signal using the uplink antenna pattern; and
measuring strength of the beacon signal received using the uplink antenna pattern, wherein the strength of the beacon signal received using the uplink antenna pattern provides an error signal associated with the complex transmitting weights.
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Accused Products
Abstract
Methods of forming a downlink beam in an adaptive antenna system of a communications system that may reduce inter-system and/or intra-system interference include receiving vectors of signals including signals transmitted by user terminals of the communications system and signals transmitted by transceivers of an independent communications system, obtaining spatial information for the user terminals of the communications system and the transceivers of the independent communications system, generating complex transmitting weights that form spatial nulls directed at the transceivers of the independent communications system, and transmitting a downlink communications signal using the complex transmitting weights. Related systems are also disclosed.
262 Citations
18 Claims
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1. A method of generating a downlink transmission signal from a base transceiver system to a user terminal associated with the base transceiver system, comprising:
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obtaining location information for a transceiver of an independent communications system not associated with the base transceiver system; generating complex transmitting weights for an adaptive antenna associated with the base transceiver system that form a spatial null directed at the transceiver of the independent communications system; and transmitting a downlink communications signal over the adaptive antenna system to the user terminal using the complex transmitting weights; wherein obtaining location information for the transceiver of the independent communications system comprises receiving a beacon signal from the transceiver of the independent communications system; and wherein generating the complex transmitting weights comprises; forming a uplink antenna pattern using the complex transmitting weights; receiving the beacon signal using the uplink antenna pattern; and measuring strength of the beacon signal received using the uplink antenna pattern, wherein the strength of the beacon signal received using the uplink antenna pattern provides an error signal associated with the complex transmitting weights. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A base transceiver system of a communication system, comprising:
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an antenna array configured to receive vectors of signals including signals transmitted by user terminals of the communications system and signals transmitted by a transceiver of an independent communications system; and an electronics system coupled to the antenna array and configured to obtain location information for a transceiver of the independent communications system, to generate complex transmitting weights for the antenna array that form a spatial null directed at the transceiver of the independent communications system, and to transmit a downlink communications signal over the adaptive antenna system to the user terminal using the complex transmitting weights; wherein the antenna array is configured to receiving a beacon signal from the transceiver of the independent communications system; and wherein the electronics system is configured to form an uplink antenna pattern using the complex transmitting weights, receive the beacon signal using the uplink antenna pattern, and to measure strength of the beacon signal received using the uplink antenna pattern, wherein the strength of the beacon signal received using the uplink antenna pattern provides an error signal associated with the complex transmitting weights. - View Dependent Claims (9, 10, 11, 12)
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13. A communications system, comprising:
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a base transceiver system comprising an antenna array configured to receive vectors of signals including signals transmitted by user terminals of the communications system and signals transmitted by a transceiver of an independent communications system, and an electronics system coupled to the antenna array and configured to obtain location information for a transceiver of the independent communications system, to generate complex transmitting weights for the antenna array that form a spatial null directed at the transceiver of the independent communications system, and to transmit a downlink communications signal over the adaptive antenna system to the user terminal using the complex transmitting weights; wherein the antenna array is configured to receive a beacon signal from the transceiver of the independent communications system; and wherein the electronics system is configures to form an uplink antenna pattern using the complex transmitting weights, receive the beacon signal using the uplink antenna pattern, and to measure strength of the beacon signal received using the uplink antenna pattern, wherein the strength of the beacon signal received using the uplink antenna pattern provides an error signal associated with the complex transmitting weights. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification