Patent 7787827 was granted and assigned to Ember (company) on August, 2010 by the United States Patent and Trademark Office.
Detecting a signal included receiving a modulated waveform, and processing a first quantized signal generated from the waveform to produce a second quantized signal. The second quantized signal is a representation of the first quantized signal with lower resolution that the first quantized signal. The second quantized signal is correlated with a quantized reference signal.