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Patent Searching and Data


Title:
APPARATUS AND METHODS FOR ADJUSTING ADAPTIVE CONTROL LOOP BEHAVIOR BASED ON MEASURED ARTIFACTS
Document Type and Number:
WIPO Patent Application WO/2013/155482
Kind Code:
A3
Abstract:
Methods and apparatus for adjusting adaptive control loop behavior based on, for example measured artifacts of the radio environment. In one embodiment, a Long Term Evolution (LTE) user equipment (UE) adjusts one or more Automatic Gain Control (AGC) loops based on a measured Doppler spread of received signals. Specifically, one or more AGC parameters (e.g., set-point, loop gain, etc.) are selected based on a measured Doppler spread. The one or more AGC parameters are configured to optimize both the AGC headroom (e.g., dynamic range) and the signal to quantization plus noise ratio (SQNR) of the receiver under dynamic wireless fading channels for the detected Doppler.

Inventors:
JI ZHU (US)
DAMJI NAVID (US)
SEBENI JOHNSON O (US)
Application Number:
PCT/US2013/036481
Publication Date:
December 19, 2013
Filing Date:
April 12, 2013
Export Citation:
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Assignee:
APPLE INC (US)
International Classes:
H04L25/00; H03G3/30
Foreign References:
EP2367385A12011-09-21
US20090060064A12009-03-05
US20080101215A12008-05-01
Attorney, Agent or Firm:
GUTIERREZ, James (PC16644 West Bernardo Drive, Suite 20, San Diego CA, US)
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