Patent ID: 11888963
Assignee: CYPRESS SEMICONDUCTOR CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A method of operating a wireless device that comprises a receiver, a data resampler circuit coupled to the receiver, and a correlation circuit coupled to the data resampler circuit, wherein the method of operating the wireless device comprises:
receiving wirelessly, by the receiver, a packet over a channel at a first frequency;
generating, by the receiver, a sampled stream of data from the packet at a first sample rate corresponding to the first frequency;
determining, by the data resampler circuit using a fractional conversion ratio between the first sample rate and a crystal oscillator (XO)-integer-divided sample rate, a plurality of re-timer values comprising differences between pulses of a pseudo clock corresponding to the XO-integer-divided sample rate and closest corresponding pulses of a clock corresponding to the first sample rate;
re-sampling, by the data resampler circuit, data values of the sampled stream of data associated with locations of the plurality of re-timer values; and
matching, by the correlation circuit using the re-sampled data values, the pseudo clock, and the plurality of re-timer values, an expected data pattern to a corresponding data pattern detected in a frame delimiter of the packet.