Communication receiver with hybrid equalizer
First Claim
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1. A method of receiving data in a wireless communication system, the method comprising:
- processing received signals through a RAKE processing element to generate RAKE processed signals;
measuring a first quality metric of the RAKE processed signals;
comparing the first quality metric of the RAKE processed signals to a first threshold value associated with an equalizer; and
when the first quality metric exceeds the first threshold value, enabling an equalizer to cause a transition to occur from a first mode of data reception wherein only a RAKE receiver is operated to a second mode of data reception wherein both a RAKE receiver and an equalizer are operated, such that power is conserved when only RAKE receiver operation is necessary.
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Abstract
Wireless communication receiver with hybrid equalizer and RAKE receiver. The receiver compares performance of the system for RAKE only and RAKE in combination with equalizer estimates. The receiver enables or disables the equalizer accordingly.
36 Citations
42 Claims
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1. A method of receiving data in a wireless communication system, the method comprising:
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processing received signals through a RAKE processing element to generate RAKE processed signals; measuring a first quality metric of the RAKE processed signals; comparing the first quality metric of the RAKE processed signals to a first threshold value associated with an equalizer; and when the first quality metric exceeds the first threshold value, enabling an equalizer to cause a transition to occur from a first mode of data reception wherein only a RAKE receiver is operated to a second mode of data reception wherein both a RAKE receiver and an equalizer are operated, such that power is conserved when only RAKE receiver operation is necessary. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of receiving data in a wireless communication system, the method comprising:
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processing received signals through a RAKE processing element to generate RAKE processed signals; and periodically testing operating conditions, comprising; processing received signals through an equalizer to generate equalizer processed signals; measuring a first quality metric of the RAKE processed signals; measuring the first quality metric of the equalizer processed signals; comparing the first quality metric of the RAKE processed signals to the first quality metric of the equalizer processed signals; and determining whether to enable the equalizer based on the comparison to cause a transition to occur from a first mode of data reception wherein only a RAKE receiver is operated to a second mode of data reception wherein both a RAKE receiver and an equalizer are operated, such that power is conserved when only RAKE receiver operation is necessary. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. An apparatus for receiving data in a wireless communication system, the method comprising:
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means for processing received signals through a RAKE processing element to generate RAKE processed signals; means for measuring a first quality metric of the RAKE processed signals; means for comparing the first quality metric of the RAKE processed signals to a first threshold value associated with an equalizer; and means for enabling an equalizer when the first quality metric exceeds the first threshold value to cause a transition to occur from a first mode of data reception wherein only a RAKE receiver is operated to a second mode of data reception wherein both a RAKE receiver and an equalizer are operated, such that power is conserved when only RAKE receiver operation is necessary.
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16. A receiver in a wireless communication system, the receiver comprising:
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processing element for processing computer-readable instructions; and memory storage device adapted to store computer-readable instructions comprising; a first set of computer-readable instructions for processing received signals through a RAKE processing element to generate RAKE processed signals; a first set of computer-readable instructions for measuring a first quality metric of the RAKE processed signals; a first set of computer-readable instructions for comparing the first quality metric of the RAKE processed signals to a first threshold value associated with an equalizer; and a first set of computer-readable instructions for enabling an equalizer when the first quality metric exceeds the first threshold value to cause a transition to occur from a first mode of data reception wherein only a RAKE receiver is operated to a second mode of data reception wherein both a RAKE receiver and an equalizer are operated, such that power is conserved when only RAKE receiver operation is necessary.
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17. An apparatus for receiving data in a wireless communication system, the apparatus comprising:
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means for processing received signals through a RAKE processing element to generate RAKE processed signals; and means for periodically testing operating conditions, comprising; means for processing received signals through an equalizer to generate equalizer processed signals; means for measuring a first quality metric of the RAKE processed signals; means for measuring the first quality metric of the equalizer processed signals; means for comparing the first quality metric of the RAKE processed signals to the first quality metric of the equalizer processed signals; and means for determining whether to enable the equalizer based on the comparison to cause a transition to occur from a first mode of data reception wherein only a RAKE receiver is operated to a second mode of data reception wherein both a RAKE receiver and an equalizer are operated, such that power is conserved when only RAKE receiver operation is necessary.
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18. A receiver in a wireless communication system, the receiver comprising:
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processing element for implementing computer-readable instructions; and memory storage device for storing computer-readable instructions for; processing received signals through a RAKE processing element to generate RAKE processed signals; and periodically testing operating conditions by; processing received signals through an equalizer to generate equalizer processed signals; measuring a first quality metric of the RAKE processed signals; measuring the first quality metric of the equalizer processed signals; comparing the first quality metric of the RAKE processed signals to the first quality metric of the equalizer processed signals; and determining whether to enable the equalizer based on the comparison to cause a transition to occur from a first mode of data reception wherein only a RAKE receiver is operated to a second mode of data reception wherein both a RAKE receiver and an equalizer are operated, such that power is conserved when only RAKE receiver operation is necessary.
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19. A wireless communication apparatus, comprising:
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a RAKE receiver adapted to receive a signal and generate an estimate of the received signal; an equalizer; and an equalization controller adapted to control operation of the equalizer in response to the estimate from the RAKE receiver wherein the control operation causes a transition to occur from a first mode of data reception wherein only a RAKE receiver is operated to a second mode of data reception wherein both a RAKE receiver and an equalizer are operated, such that power is conserved when only RAKE receiver operation is necessary. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A method of receiving data in a wireless communications system, comprising:
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processing received signals through only a RAKE processing element to generate processed signals; comparing a quality metric of the RAKE processed signals to a threshold value; and powering an equalizer to process the received signals concurrently with the RAKE processing element, when the quality metric exceeds the threshold value causing a transition to occur from a first mode of data reception wherein only a RAKE receiver is operated to a second mode of data reception wherein both a RAKE receiver and an equalizer are operated, such that power is conserved when only RAKE receiver operation is necessary.
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34. A method of receiving data in a wireless communication system, comprising:
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comparing a first metric associated with a RAKE processing element to a second metric associated with an equalizer; and based on said comparing, determining whether to transition from one of first and second modes of data reception to the other of said first and second modes of data reception; wherein said first mode of data reception is defined by operation of only a RAKE processing element; and wherein said second mode of data reception is defined by concurrent operation of the RAKE processing element and an equalizer such that power is conserved when only operation of the RAKE receiver is necessary. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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41. An apparatus for receiving data in a wireless communication system, comprising:
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means for comparing a first metric associated with a RAKE processing means to a second metric associated with an equalizing means; and means for determining, based on said comparing, whether to transition from one of first and second modes of data reception to the other of said first and second modes of data reception; wherein said first mode of data reception is defined by operation of only the RAKE processing means; wherein said second mode of data reception is defined by operation of both the RAKE processing means and an equalizing means; and wherein said first combination of operational states differs from said second combination of operational states such that power is conserved when only RAKE receiver operation is necessary.
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42. A computer program product in a wireless communication system, comprising:
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computer readable medium storing code therein, said code comprising; instructions causing a computer to compare a first metric associated with a RAKE processing element to a second metric associated with an equalizer; instructions causing a computer to determine, based on said comparing, whether to transition from one of first and second modes of data reception to the other of said first and second modes of data reception; wherein said first mode of data reception is defined by operation of only the RAKE processing element; wherein said second mode of data reception is defined by operation of the RAKE processing element and an equalizer; and wherein said first combination of operational states differs from said second combination of operational states such that power is conserved when only RAKE receiver operation is necessary.
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Specification