CA2503042A1 - Method and apparatus for adapting antenna array using received predetermined signal - Google Patents

Method and apparatus for adapting antenna array using received predetermined signal Download PDF

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Publication number
CA2503042A1
CA2503042A1 CA002503042A CA2503042A CA2503042A1 CA 2503042 A1 CA2503042 A1 CA 2503042A1 CA 002503042 A CA002503042 A CA 002503042A CA 2503042 A CA2503042 A CA 2503042A CA 2503042 A1 CA2503042 A1 CA 2503042A1
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CA
Canada
Prior art keywords
signal
received
quality metric
weight control
signal quality
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002503042A
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French (fr)
Other versions
CA2503042C (en
Inventor
John A. Regnier
James A. Proctor, Jr.
Michael J. Lynch
Thomas E. Gorsuch
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IPR Licensing Inc
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Individual
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Publication of CA2503042A1 publication Critical patent/CA2503042A1/en
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Publication of CA2503042C publication Critical patent/CA2503042C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/2605—Array of radiating elements provided with a feedback control over the element weights, e.g. adaptive arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/28—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the amplitude
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
    • H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
    • H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
    • H01Q3/36—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/086—Weighted combining using weights depending on external parameters, e.g. direction of arrival [DOA], predetermined weights or beamforming

Abstract

An antenna apparatus that can increase capacity in a wireless communication system is disclosed. The antenna operates in conjunction with a station and comprises a plurality of antenna elements (101-n), each coupled to a respective weight control component (111-n) to provide a weight to the signa l transmitted from (or received by) each element. The weight for each antenna element is adjusted to achieve optimum reception during, for example, an idl e mode when a pilot signal is received. The antenna array creates a beam forme r for signals to be transmitted from the mobile station, and a directional receiving array to more optimally detect and receive signals transmitted fro m the base station. By directionally receiving and transmitting signals, multipath fading and intercell interference are greatly reduced. The weights are adjusted in a coarse and a fine mode. In the coarse mode all the weight control components are jointly adjusted or changed so that the antenna beam scans through a predetermined sector of a circle until a signal quality metr ic of the received signal is optimized. The coarse adjustment mode is followed by a fine adjustment mode during which the weights of are independently adjuste d to further optimize the signal quality metric.

Claims (27)

1. A method for setting optimal weight control component arrangements for a plurality of antenna elements of a transceiver, the method comprising the steps of:
(a) receiving a predetermined signal from each of the plurality of antenna elements;
(b) combining the received predetermined signal detected from each of the plurality of antenna elements to produce a combined received predetermined signal;
(c) determining a signal quality metric for the combined received predetermined signal;
(d) jointly adjusting the weight control components associated with at least two of the plurality of antenna elements in the station in response to the signal quality metric of the received predetermined signal;
(e) repeating the step (d) until an optimum signal quality metric is achieved;
(f) independently adjusting the weight control components in response to the signal quality metric of the received predetermined signal;
and (g) repeating the step (e) until the determined signal quality metric of the combined received predetermined signal reaches an optimum value.
2. The method of claim 1 wherein the signal quality metric is the ratio of received signal energy to interference.
3. The method of claim 1 wherein the signal quality metric is the ratio of received signal energy to thermal noise.
4. The method of claim 1 wherein the signal quality metric is received signal power.
5. The method of claim 1 wherein each weight control component includes a phase shifter.
6. The method of claim 1 wherein each weight control component includes an amplifier and a phase shifter.
7. The method of claim 1 wherein each weight control component includes an electromagnetic coupler.
8. The method of claim 1 wherein the steps (d) and (f) include adjusting the amplitude, phase or the amplitude and the phase imparted to the output signal from the plurality of antenna elements.
9. The method of claim 1 including a plurality of transceivers, wherein said plurality of transceivers comprises a first plurality of stations and a second plurality of base stations, wherein the step (a) is executed at the beginning a communication session between a station from among said first plurality of stations and a base station from among said second plurality of base stations.
10. The method of claim 1 wherein the optimum value of the signal quality metric exceeds a predetermined value.
11. The method of claim 1 where the predetermined signal is a pilot signal.
12. The method of claim 1 wherein the predetermined signal is a beacon frame.
13. The method of claim 1 wherein the predetermined signal is selected from the group consisting of a preamble, Barker, training or other apriori sequence known at the receiver.
14. The method of claim 1 wherein step (b) of combining further comprises, after adjusting weight control components for at least two specific received predetermined signals, a step of combining the specific received predetermined signals prior to combining other received predetermined signals.
15. The method of claim 1 wherein the adjustment of the weight control components occurs when the station is in an active state.
16. The antenna apparatus of claim 1 wherein the weight control components are jointly adjustable in a first mode and independently adjustable in a second mode to optimize the signal received at the antenna elements by reducing the interference caused by signals that are not transmitted from an intended base station.
17. The method of claim 1 wherein the weight control components are jointly adjustable a first mode and independently adjustable in a second mode to optimize the signal transmitted to a selected base station via the antenna elements by reducing the interference caused to other base stations.
18. The method of claim 1 in which multiple base stations transmit code division multiple access signals on a common carrier frequency.
19. The method of claim 18 wherein the code division multiple access signals are transmitted within a cell, each cell containing a base station and a plurality of mobile stations, each mobile station having an antenna apparatus.
20. The method of claim 1 wherein a plurality of stations and at least one base station comprise a system for providing wireless local area network communications between a plurality of mobile stations an access point.
21. A method for setting optimal weight control component arrangements for a plurality of antenna elements connected to a plurality transceivers, the method comprising the steps of:
(a) receiving a predetermined signal, from the plurality of antenna elements;
(b) combining the received predetermined signals, detected at each of the plurality of transceivers, to produce a composite received predetermined signal;
(c) determining a signal quality metric for the composite received predetermined signal;
(d) jointly adjusting the weight control components associated with at least two of the plurality of antenna elements in response to the signal quality metric of the received predetermined signal;
(e) repeating the step (d) until an optimum signal quality metric is achieved;
(f) independently adjusting the weight control components in response to the signal quality metric of the received signal; and (g) repeating the step (e) until the determined signal quality metric of the composite received predetermined signal reaches an optimum value.
22. The method of claim 21 wherein the signal quality metric is the ratio of received signal energy to interference.
23. The method of claim 21 wherein the signal quality metric is the ratio of received signal energy to thermal noise.
24. The method of claim 21 wherein the signal quality metric is received signal power.
25. The method of claim 21 wherein each weight control component includes a phase shifter.
26. The method of claim 21 wherein each weight control component includes an amplifier and a phase shifter.
27. The method of claim 21 wherein each weight control component includes an electromagnetic coupler.
CA002503042A 2002-10-28 2003-10-28 Method and apparatus for adapting antenna array using received predetermined signal Expired - Fee Related CA2503042C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/282,928 2002-10-28
US10/282,928 US6933887B2 (en) 1998-09-21 2002-10-28 Method and apparatus for adapting antenna array using received predetermined signal
PCT/US2003/034215 WO2004040692A1 (en) 2002-10-28 2003-10-28 Method and apparatus for adapting antenna array using received predetermined signal

Publications (2)

Publication Number Publication Date
CA2503042A1 true CA2503042A1 (en) 2004-05-13
CA2503042C CA2503042C (en) 2010-01-12

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CA002503042A Expired - Fee Related CA2503042C (en) 2002-10-28 2003-10-28 Method and apparatus for adapting antenna array using received predetermined signal

Country Status (11)

Country Link
US (2) US6933887B2 (en)
EP (1) EP1559169A4 (en)
JP (1) JP2006504354A (en)
KR (1) KR100817620B1 (en)
CN (1) CN1708876A (en)
AU (1) AU2003285061A1 (en)
CA (1) CA2503042C (en)
MX (1) MXPA05004603A (en)
NO (1) NO20052572L (en)
TW (1) TW200509458A (en)
WO (1) WO2004040692A1 (en)

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EP1559169A4 (en) 2006-06-07
MXPA05004603A (en) 2005-10-26
TW200509458A (en) 2005-03-01
US7009559B2 (en) 2006-03-07
US20030222818A1 (en) 2003-12-04
CA2503042C (en) 2010-01-12
WO2004040692A1 (en) 2004-05-13
JP2006504354A (en) 2006-02-02
KR100817620B1 (en) 2008-03-31
KR20050073587A (en) 2005-07-14
NO20052572L (en) 2005-07-28
EP1559169A1 (en) 2005-08-03
US6933887B2 (en) 2005-08-23
CN1708876A (en) 2005-12-14
NO20052572D0 (en) 2005-05-27
AU2003285061A1 (en) 2004-05-25
US20050068231A1 (en) 2005-03-31

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