WIRELESS BASE STATION DESIGN
First Claim
Patent Images
1. A multi-transmitter base station for wireless digital communication, having beam forming and digital pre-distortion capabilities, comprising a shared feedback unit for providing feedback of outgoing Radio Frequency (RF) signals, for calibrating a plurality of antennas, and for adapting the digital pre-distortion.
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Abstract
A multi-transmitter base station for wireless digital communication, having beam forming and digital pre-distortion capabilities, including a shared feedback unit for providing feedback of outgoing Radio Frequency (RF) signals for calibrating a plurality of antennas and for adapting the digital pre-distortion. Related apparatus and methods are also described.
415 Citations
54 Claims
- 1. A multi-transmitter base station for wireless digital communication, having beam forming and digital pre-distortion capabilities, comprising a shared feedback unit for providing feedback of outgoing Radio Frequency (RF) signals, for calibrating a plurality of antennas, and for adapting the digital pre-distortion.
- 11. A multi-transmitter base station for wireless digital communication, having a feedback unit acting as a mux/demux for all feedback and calibration signals, shunting the feedback and calibration signals to their respective destinations.
- 13. A multi-transmitter base station for wireless digital communication comprising multiple receivers, in which at least one receiver shares an analog RF LO with at least one transmitter.
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16. A method of calibration in a multi-receiver base station for wireless digital communication having at least one transmit path comprising:
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providing a transmission signal through the transmit path; prior to power amplification, routing the transmission signal, back through a plurality of receive paths; and measuring transfer functions of signals by comparing the transmission signal to signals received through the plurality of the receive paths. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of calibration in a multi-transmitter base station for wireless digital communication having at least one receive path comprising:
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providing a transmission signal through a plurality of transmit paths; routing the transmission signal back through the receive path; and measuring transfer functions of signals by comparing the transmission signal to signals received through each one of at least some of the plurality of transmit paths and the receive path. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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34. A method for calibrating receive paths and transmit paths in a base station for wireless digital communication having a plurality of receive paths and transmit paths comprising:
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providing a first transmission signal through a transmit path; prior to power amplification, routing the first transmission signal back through a plurality of receive paths; measuring a first set of transfer functions by comparing the first transmission signal to signals received through at least some of the plurality of the receive paths; providing a second transmission signal through a plurality of transmit paths; routing the second transmission signal back through a receive path; measuring a second set of transfer functions of signals by comparing the second transmission signal to a signal received through at least some of the plurality of transmit paths and the receive path; and calibrating at least some of the transmit paths and receive paths based, at least partly, on the first set and the second set. - View Dependent Claims (35, 36, 37)
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38. A method for transmitting via multiple transmit paths in a multi-transmitter base station for wireless digital communication comprising sharing a single Radio-Frequency (RF) Local Oscillator (LO) between more than one transmit path.
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39. A multi-transmitter base station for wireless digital communication configured to perform self calibration of a plurality of receive paths, in which at least some of the plurality of receive paths share a Radio-Frequency (RF) Local Oscillator (LO), comprising:
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means for providing a transmission signal through a transmit path; means for routing the transmission signal, prior to power amplification, back through the plurality of receive paths; and means for measuring transfer functions of signals by comparing the transmission signal to signals received through the plurality of the receive paths. - View Dependent Claims (40)
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41. A multi-transmitter base station for wireless digital communication configured to perform self calibration of a plurality of transmit paths, in which at least some of the plurality of transmit paths share a Radio-Frequency (RF) Local Oscillator (LO), comprising:
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means for providing a transmission signal through the plurality of transmit paths; means for routing the transmission signal back through a receive path; and means for measuring transfer functions of signals by comparing the transmission signal to signals received through each one of at least some of the plurality of transmit paths and the receive path. - View Dependent Claims (42)
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43. A multi-transmitter base station for wireless digital communication comprising:
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a base band unit which receives input of digital communication and encoding the digital communication, configured for digital operation at frequencies lower than Radio Frequency (RE); and a radio unit which operates at frequencies including RF, wherein; the base band unit and the radio unit communicate with each other at frequencies lower than RF; the base band unit and the radio unit are packaged in separate modular units; and the base station is configured to comprise a plurality of at least one of the base band unit and the radio unit. - View Dependent Claims (44, 45, 46, 47, 48)
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49. A multi-transmitter base station for wireless digital communication comprising:
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a master unit configured to supply Radio-Frequency (RF) Local Oscillator (LO) signals for the base station; and one or more auxiliary units configured to receive the RF LO signals from the master unit and provide functionality of at least one of a transmit path and a receive path. - View Dependent Claims (50, 51, 52, 53, 54)
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Specification