Interference estimation using data traffic power and reference signal power
First Claim
Patent Images
1. A method of computing an interference estimate for wireless communication, comprising:
- receiving by a user equipment (UE) pilot tones from a serving cell and pilot tones from at least one interferer, where the pilot tones from the at least one interferer collide with the pilot tones from the serving cell;
generating a first traffic to pilot ratio (TPR) estimate of the at least one interferer;
computing a reliability of the first TPR estimate based on a received power of the serving cell and a received power of the at least one interferer;
generating a second TPR estimate based on the first TPR estimate and the reliability of the first TPR estimate; and
computing the interference estimate based on the second TPR estimate.
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Abstract
In a wireless communication system, interference on data tones is estimated by detecting data transmissions from interferers. An overall interference covariance matrix is estimated as a function of scalar traffic to pilot ratio (TPR) estimates, residual interference covariance estimates, and covariance of channel estimates of dominant interferers. The interference estimates are refined as a function of reliability based on a ratio of power received from a serving cell and power received from a dominant interferer.
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Citations
19 Claims
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1. A method of computing an interference estimate for wireless communication, comprising:
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receiving by a user equipment (UE) pilot tones from a serving cell and pilot tones from at least one interferer, where the pilot tones from the at least one interferer collide with the pilot tones from the serving cell; generating a first traffic to pilot ratio (TPR) estimate of the at least one interferer; computing a reliability of the first TPR estimate based on a received power of the serving cell and a received power of the at least one interferer; generating a second TPR estimate based on the first TPR estimate and the reliability of the first TPR estimate; and computing the interference estimate based on the second TPR estimate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for computing an interference estimate for wireless communication, comprising:
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means for receiving by a user equipment (UE) pilot tones from a serving cell and pilot tones from at least one interferer, the pilot tones from the at least one interferer colliding with the pilot tones from the serving cell; means for generating a first traffic to pilot ratio (TPR) estimate of the at least one interferer; means for computing a reliability of the first TPR estimate based on a received power of the serving cell and a received power of the at least one interferer; means for generating a second TPR estimate based on the first TPR estimate and the reliability of the first TPR estimate; and means for computing the interference estimate based on the second TPR estimate. - View Dependent Claims (9, 10, 11)
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12. A computer program product for computing an interference estimate for wireless communication in a wireless network, comprising:
a non-transitory computer-readable medium having program code recorded thereon, the program code comprising; program code to receive by a user equipment (UE) pilot tones from a serving cell and pilot tones from at least one interferer, where the pilot tones from the at least one interferer collided with the pilot tones from the serving cell; program code to generate a first traffic to pilot ratio (TPR) estimate of the at least one interferer; program code to compute a reliability of the first TPR estimate based on a received power of the serving cell and a received power of the at least one interferer; program code to generate a second TPR estimate based on the first TPR estimate and the reliability of the first TPR estimate; and program code to compute the interference estimate based on the second TPR estimate. - View Dependent Claims (13, 14, 15)
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16. A system for computing an interference estimate for wireless communication, comprising:
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a memory; and at least one processor coupled to the memory, the at least one processor being configured; to receive by a user equipment (UE) pilot tones from a serving cell and pilot tones from at least one interferer, where the pilot tones from the at least one interferer collide with the pilot tones from the serving cell; to generate a first traffic to pilot ratio (TPR) estimate of the at least one interferer; to compute a reliability of the first TPR estimate as a function of received power of the serving cell and a received power of the at least one interferer; to generate a second TPR estimate based on the first TPR estimate and the reliability of the first TPR estimate; and to compute the interference estimate based on the second TPR estimate. - View Dependent Claims (17, 18, 19)
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Specification