DEVICES AND METHODS FOR LOCATING RECEIVED TONES IN WIRELESS COMMUNICATIONS SYSTEMS

摘要

Access terminals are adapted to determine a tone location even when the tone is asymmetric. According to one example, an access terminal can obtain a plurality of samples for a received tone. The access terminal may detect which sample of the plurality of samples exhibits a maximum correlation value. The access terminal may further determine a location of the received tone based on the sample exhibiting the maximum correlation value. In some examples, the location of the received tone may be determine based on the sample exhibiting the maximum correlation value when a predicted signal-to-noise ratio (SNR) is above a predetermined threshold. Otherwise, the access terminal may determine the tone location based on a central location between a first sample with a correlation value above a predefined threshold and a first subsequent sample with a correlation value below the predefined threshold. Other aspects, embodiments, and features are also included.

主权项

1. An access terminal, comprising:
a communications interface; and a processing circuit coupled to the communications interface, the processing circuit adapted to:
receive a transmitted tone via the communications interface;obtain a plurality of samples for the received tone; anddetermine a location of the received tone based on a sample exhibiting a maximum correlation value.