Patent ID: 7508890
Filing Date: 2009-03-24
Classification: H04L

Abstract:
1. A frequency-shift-keyed (FSK) receiver, comprising: demodulation circuitry capable of receiving an incoming FSK signal and generating a baseband signal; auto-correlation circuitry capable of sampling the baseband signal and generating an auto-correlation function, the auto-correlation function having a positive-going peak approximately coinciding with a center of a Logic 1 symbol in the baseband signal and having a negative-going peak approximately coinciding with a center of a Logic 0 symbol in the baseband signal; and decision circuitry capable of deciding a logic level of a first symbol using the auto-correlation function wherein the decision circuitry is capable of deciding the logic level of the first symbol by comparing a signal level of a center sample of the first symbol and a mean signal level of the auto-correlation function.