Method and system for controlling a communications carrier's power spectral density (PSD) using spread spectrum for matched spectral allocation
First Claim
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1. 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.
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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.
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Citations
24 Claims
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1. A method of reducing adjacent satellite interference, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for reducing adjacent satellite interference, the system comprising:
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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. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification