Invention Grant
- Patent Title: Hysteresis nonlinear state machine with overlapping thresholds for automatic frequency control
- Patent Title (中): 具有自动频率控制重叠阈值的滞后非线性状态机
-
Application No.: US13862756Application Date: 2013-04-15
-
Publication No.: US08903345B2Publication Date: 2014-12-02
- Inventor: Onur Canpolat , Francis Chukwuemeka Onochie
- Applicant: Research In Motion Limited
- Applicant Address: unknown Waterloo, Onatrio
- Assignee: BlackBerry Limited
- Current Assignee: BlackBerry Limited
- Current Assignee Address: unknown Waterloo, Onatrio
- Agency: Gowling Lafleur Henderson LLP
- Main IPC: H04B1/06
- IPC: H04B1/06 ; H04B7/00 ; H03J7/02 ; H04L27/00

Abstract:
A method and apparatus for non-linear frequency control tracking of a control loop of a voltage controlled oscillator (VCO) in a wireless mobile device receiver is provided. A channel metric based on one or more channel quality indicators associated with a received radio frequency channel is determined and a state metric associated with the current operating state of the control loop are determined. One or more state metric threshold value associated with the determined channel metric, providing hysteresis between operating states, are determined wherein each state metric threshold value is associated with a transition to a possible operating state of the control loop. The control loop transitions from the current operating state to the operating state associated with an exceeded state metric threshold value. Coefficients are provided to an adaptive loop filter of the control loop, wherein the coefficients are associated with the transitioned operating state.
Public/Granted literature
- US20130231071A1 HYSTERESIS NONLINEAR STATE MACHINE WITH OVERLAPPING THRESHOLDS FOR AUTOMATIC FREQUENCY CONTROL Public/Granted day:2013-09-05
Information query