Adaptive antenna array system calibration
First Claim
1. In a wireless communication system, a method of operating an adaptive antenna array at a first station comprising the steps of:
- uniquely beamforming and simultaneously transmitting first and second individually identifiable outbound signals for reception by a second station;
receiving inbound signals from the second station;
variable beamforming the second individually identifiable outbound signal in response to said step of receiving, wherein said variable beamforming varies the beamform of the second individually identifiable outbound signal substantially independently of an inbound beamform.
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Accused Products
Abstract
A code division multiple access time division duplex communication system having an adaptive antenna array station communicates beamformed orthogonal code channels to a remote station. The remote station determines the amplitude and phase components of the received code channels and communicates the information back to the adaptive antenna array station which uses the information plus the beamform of the received signal in an adaptive antenna array station calibration process. By varying one of the beamforms received by the remote station, sufficient data points may be gathered to facilitate accurate calibration. The calibration procedure may be performed while voice or other digital information is communicated between the remote station and the adaptive antenna array station.
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Citations
29 Claims
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1. In a wireless communication system, a method of operating an adaptive antenna array at a first station comprising the steps of:
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uniquely beamforming and simultaneously transmitting first and second individually identifiable outbound signals for reception by a second station; receiving inbound signals from the second station; variable beamforming the second individually identifiable outbound signal in response to said step of receiving, wherein said variable beamforming varies the beamform of the second individually identifiable outbound signal substantially independently of an inbound beamform. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. In a wireless communication system, an adaptive antenna array first station comprising:
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an outbound beamformer for uniquely beamforming and simultaneously transmitting first and second individually identifiable outbound signals for reception by a second station; a receiver for receiving inbound signals from the second station; a calibrator for variable beamforming the second individually identifiable outbound signal wherein the variation is substantially independent of an inbound beamform determinable in response to inbound signals received by said receiver. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. In a wireless communication system, a method of operating a second station receiving a signal from an adaptive antenna array at a first station comprising the steps of:
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simultaneously receiving uniquely beamformed first and second individually identifiable signals from the first station; determining amplitude and phase components of the first and second individually identifiable signals and generating an information signal indicative thereof; and transmitting the information signal to the first station. - View Dependent Claims (25)
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26. In a wireless communication system, a method of operating an adaptive antenna array at a first station comprising steps of:
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transmitting a first outbound signal with a first beam profile and a second outbound signal with a second beam profile to a second station; receiving an inbound signal with a third beam profile from the second station, wherein the inbound signal carries feedback information regarding the first and second outbound signals; modifying the second beam profile in response to the feedback information and in response to reception information regarding the inbound signal. - View Dependent Claims (27, 28)
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29. In a wireless communications system, a method for configuring an adaptive antenna array at a first station, the method comprising steps of:
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the first station transmitting a first outbound signal with a first beam profile to a second station; the first station transmitting a second outbound signal with a second beam profile to the second station; the second station receiving the first and second outbound signals; determining outbound characteristics of the adaptive antenna from the first and second outbound signals; the second station transmitting an inbound signal to the first station, wherein the inbound signal carries the outbound characteristics; the first station receiving the inbound signal from the second station; calculating inbound characteristics of the adaptive antenna from the inbound signal; reading the outbound characteristics from the inbound signal; and modifying the second beam profile in response to the inbound and outbound characteristics; wherein the modified second beam profile is usable in subsequent transmissions from the first station.
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Specification