Mobile military satellite receiver architecture for accommodating wide carrier offset and method of performing coarse carrier offset adjustment
AssigneeAgere Systems Inc.
InventorYhean-Sen Lai
Life of this patent
Estimating the term…
Abstract
A coarse carrier offset adapter for determining a coarse carrier offset for application to a received satellite signal, a method of performing coarse carrier offset adjustment and a time division multiplexing (TDM) satellite receiver. In one embodiment, the adapter includes: (1) an energy estimator configured to analyze, with respect to the received satellite signal, energies in bands on either side of a baseband as displaced by a coarse carrier offset and (2) an offset adapter coupled to the energy estimator and configured to change the coarse carrier offset until the energies become substantially equal and provide the coarse carrier offset to a digital down converter for the application.
Claims20
A coarse carrier offset adapter for determining a coarse carrier offset for application to a received satellite signal, comprising:
- an energy estimator configured to analyze, with respect to said received satellite signal, energies in bands on either side of a baseband as displaced by a coarse carrier offset;
- and
- an offset adapter coupled to said energy estimator and configured to change said coarse carrier offset until said energies become substantially equal and provide said coarse carrier offset to a digital down converter for said application.
A method of performing coarse carrier offset adjustment for application to a received satellite signal, comprising:
- analyzing, with respect to said received satellite signal, energies in bands on either side of a baseband as displaced by a coarse carrier offset;
- changing said coarse carrier offset until said energies become substantially equal;
- and
- providing said coarse carrier offset to a digital down converter for said application.
A time division multiplexing (TDM) satellite receiver, comprising:
- a TDM antenna adapted to receive a quadrature modulated satellite signal;
- an antenna radio frequency (RF) processor coupled to said TDM antenna;
- an RF/intermediate frequency (RF/IF) processor coupled to said antenna radio frequency processor;
- an analog to digital converter (ADC) coupled to said RF/IF processor;
- first and second TDM demodulators;
- and
- a digital down converter, interposing said ADC and said first and second TDM demodulators and having a coarse carrier offset adapter for determining a coarse carrier offset for application to said satellite signal, including:
- an energy estimator configured to analyze, with respect to said satellite signal, energies in bands on either side of a baseband as displaced by a coarse carrier offset, and
- an offset adapter coupled to said energy estimator and configured to change said coarse carrier offset until said energies become substantially equal and provide said coarse carrier offset to said digital down converter for said application.
Dependencies are inferred from the claim text.