Systems and methods for timing recovery in near-field communication

摘要

A method for inductively-coupled communications is described. The method includes receiving a signal. The method also includes analyzing the signal to estimate a symbol timing error. Estimating the symbol timing error may include comparing a location of a pause, a low-to-high or a high-to-low transition in the received signal with an ideal location of a pause or a transition. The method further includes adjusting symbol timing to correct for the symbol timing error.

主权项

1. A method for inductively-coupled communications, comprising:
receiving a signal from an inductively coupled communication device; analyzing the signal to estimate a symbol timing error, comprising:
summing multiple samples in a first portion of the signal for a bit to form a first sum;summing multiple samples in a second portion of the signal for the bit to form a second sum;determining the symbol timing error based on at least the first sum and the second sum; and adjusting symbol timing to correct for the symbol timing error by adding or subtracting the estimated symbol timing error from a sample counter that counts samples from a start of a symbol.