Method and apparatus for implementing signal quality metrics and antenna diversity switching control

摘要

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.

主权项

1. 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).