Method and system for controlling a communications carrier's power spectral density (PSD) using spread spectrum for matched spectral allocation
AssigneeComtech EF Data Corp.
InventorsCris M. Mamaril, Michael Beeler, Wallace Davis
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Abstract
A method of reducing adjacent satellite interference, the method comprising monitoring, by a processor, a power spectral density (PSD) of a signal transmitted by a remote transmitter, determining, by the processor, that the PSD of the signal transmitted by the remote transmitter is above a predetermined level, and reducing the PSD of the signal transmitted by the remote transmitter by adjusting at least one of a spread spectrum spreading factor, a power level, a modulation factor, and a forward error correction (FEC) rate using a modulator while maintaining a constant spectral allocation and center frequency of the signal.
Claims24
A method of reducing adjacent satellite interference, the method comprising:
- monitoring, by a processor, a power spectral density (PSD) of a signal transmitted by a remote transmitter, the signal comprising a non-spread waveform;
- determining, by the processor, that the PSD of the signal transmitted by the remote transmitter is above a predetermined level;
- reducing the PSD of the signal transmitted by the remote transmitter by adjusting at least one of a spread spectrum spreading factor, a modulation factor, and a forward error correction (FEC) rate using a modulator while maintaining a constant spectral allocation and center frequency of the signal;
- transitioning the non-spread waveform to a spread waveform wherein the non-spread waveform and the spread waveform have a same spectral allocation;
- and
- applying a spread factor of a type 2^N while transitioning the non-spread waveform to a spread waveform.
A system for reducing adjacent satellite interference, the system comprising:
- a remote transmitter configured to transmit a signal comprising a non-spread waveform to a remote receiver;
- a processor configured to:
- monitor a power spectral density (PSD) of the signal transmitted by the remote transmitter;
- and
- determine that the PSD of the signal transmitted by the remote transmitter is above a predetermined level;
- and
- a modulator configured to:
- reduce the PSD of the signal transmitted by the remote transmitter by adjusting at least one of a spread spectrum spreading factor, a modulation factor, and a forward error correction (FEC) rate while maintaining a constant spectral allocation and center frequency of the signal;
- transition the non-spread waveform to a spread waveform wherein the non-spread waveform and the spread waveform have a same spectral allocation;
- and
- apply a spread factor of a type 2^N while transitioning the non-spread waveform to a spread waveform.
Dependencies are inferred from the claim text.