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US 8,817,917 B2Granted
Method and apparatus for implementing signal quality metrics and antenna diversity switching control
AssigneeiBiquity Digital Corporation
InventorsBrian W. Kroeger, Paul J. Peyla
Life of this patent
Estimating the term…
Abstract
A method for detecting the digital quality of a radio signal includes: receiving a radio signal including a digital portion modulated by a series of symbols each including a plurality of samples; computing correlation points between endpoint samples in cyclic prefix regions of adjacent symbols; and using the correlation points to produce a digital signal quality metric. Receivers that implement the method are also provided.
Claims14
A method comprising:
- (a) receiving a radio signal on a plurality of antenna elements;
- (b) computing a signal quality metric for the signal received on each of the antenna elements;
- (c) determining a difference value between the signal quality metric for a currently selected antenna element and the signal quality metric for each of the other antenna elements;
- (d) finding the minimum difference value;
- (e) determining (1) if a dwell value is greater than a multiple of the minimum difference value and (2) if the signal quality metric computed for the currently selected antenna element is less than a threshold value;
- and
- (f) if either or both of (1) or (2) in step (e) is true, then switching from the currently selected element to one of the other antenna elements for supplying the radio signal to a receiver and repeating steps (b) through (e).
4 more elements
An apparatus comprising:
- a plurality of antenna elements configured to receive a radio signal;
- a switch configured to connect one or more of the antenna elements to an input of a receiver;
- and
- a processor configured to (a) compute a signal quality metric for the signal received on each of the antenna elements, (b) determine a difference value between the signal quality metric for a currently selected antenna element and the signal quality metric for each of the other antenna elements, (c) find the minimum difference value, (d) determine (1) if a dwell value is greater than a multiple of the minimum difference value and (2) if the signal quality metric computed for the currently selected antenna element is less than a threshold value, and (e) if either or both of (1) or (2) in step (e) is true, then control the switch to switch from the currently selected element to one of the other antenna elements to supply the radio signal to the receiver and repeat (a) through (d).
1 more element
A method comprising:
- receiving a radio signal on a plurality of antenna elements, wherein the radio signal includes a digitally modulated component;
- computing a digital signal quality metric for the signal received on each of the antenna elements;
- using the digital signal quality metric for an antenna element currently supplying the radio signal to a receiver to determine if diversity switching is desired;
- and
- producing a synthesized FM intermediate frequency proxy control signal that causes a diversity switch control to implement a desired switching of the antenna elements.
2 more elements
Dependencies are inferred from the claim text.