Efficient method to compute one shot frequency estimate
AssigneeQUALCOMM Incorporated
InventorAlok Gupta
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for efficiently determining frequency estimates in a forward link only wireless receiver. In one embodiment, a method is provided to compute a one shot frequency estimate. The method includes representing an arc tangent function in a table that describes elements of the function and employing the arc tangent function to compute phase information for a wireless device.
Claims34
A method to compute a one shot frequency estimate, comprising:
- representing an arc tangent function in a table that describes elements of the function;
- and
- employing the arc tangent function to compute phase information for a wireless device.
An angle generator module for a wireless network system, comprising:
- an inverse lookup block to determine a 1/x function for the angle generator;
- and
- an arc tangent lookup block that is applied after the inverse lookup block to determine an angle for a wireless receiver.
A system for determining angles in a wireless network, comprising:
- means for receiving a symbol stream;
- means for performing an inverse lookup to determine a 1/x function;
- and
- means for performing an arc tangent lookup that is applied after the inverse lookup to determine an angle for a wireless component.
A machine readable medium having machine executable instructions stored thereon, comprising:
- determining a one-shot frequency estimate from an arc tangent look up table;
- applying an inverse lookup function to the arc tangent lookup table;
- and
- applying an output generated from the one-shot frequency estimate in an automatic frequency control function.
A machine readable medium having a data structure stored thereon, comprising:
- a plurality of data fields storing an inverse lookup function for an arc tangent function;
- and
- a plurality of data fields storing the arc tangent lookup function, where the inverse lookup function and the arc tangent lookup function cooperate to determine and angle for a wireless receiver.
A wireless communications apparatus, comprising:
- a memory that includes a component to determine an inverse lookup parameter and an arc tangent function;
- and
- a processor that determines at least one angle from the arc tangent function in view of the inverse lookup parameter.
A processor that executes instructions for a wireless network, the instructions comprising:
- computing a frequency estimate from an arc tangent look up table;
- determining an inverse lookup function in accordance with the arc tangent lookup table;
- and
- employing the frequency estimate in an automatic frequency control function.
Dependencies are inferred from the claim text.