Patent ID: 6836515
Filing Date: 2004-12-28
Classification: H04B,H04J,H04L,H04Q,H04W

Abstract:
A radio comprising:a multi-modulation modem, wherein the multi-modulation modem comprises: a modulator that modulates signals using a plurality of modulations on a burst-by-burst basis; and a demodulator that demodulates received signals having been modulated using said plurality of modulations, wherein said demodulator comprises: an acquisition, wherein said acquisition section comprises: a precorrelation filter; and a burst detector and parameter estimator unit coupled to the precorrelation filter; and a tracking section, wherein the tracking section comprises: an automatic gain control; an equalizer and phase rotator unit coupled to the automatic gain control; a multi-modulation slicer coupled to the equalizer and phase rotator unit, wherein the multi-modulation slicer maps said received signals to a respective one of a plurality of constellations, and each of said plurality of constellations corresponds to respective ones of said plurality of modulations; and a carrier recovery loop coupled to multi-modulation slicer and the equalizer and phase rotator unit; a frequency converter coupled to the multi-modulation modem for converting the signals to a radio frequency; and a transceiver unit including an antennae coupled to the frequency converter for transmitting the signals over a radio communications link.