Patent ID: 6441683
Filing Date: 2002-08-27
Classification: H04L

Abstract:
A demodulation circuit comprising:a) an A/D converter generating a series of samples representing a frequency diverse modulated carrier including redundant data transmitted in a plurality of sub-spectra; b) a mixer receiving the series of samples and generating frequency shifted I-signal and a frequency shifted Q-signal representing redundant data in a plurality of frequency shifted sub-spectra; c) a filter bank including a plurality of narrow band filters, each centered at one of a plurality of the frequency shifted sub-spectra, each receiving the frequency shifted I-signal and the frequency shifted Q-signal, and each generating a sub-spectrum data signal comprising a sub spectrum I-signal and a sub-spectrum Q-signal; d) a selection circuit determining which one of the sub-spectrum data signals is the strongest sub-spectrum data signal; and e) a receiver circuit generating digital data in response to the strongest sub spectrum data signal.