Broadband demodulator for modified downstream waveform
First Claim
1. A terminal to receive a signal transmitted by a satellite, the terminal comprising:
- a receiver configured to receive the signal transmitted by the satellite; and
a header processor, communicatively coupled with the receiver, and configured to;
receive a digitized stream comprising a physical layer signal representative of the received signal, the digitized stream including a plurality of physical layer headers spaced substantially equidistant in time and each associated with a respective physical layer payload;
analyze the digitized stream to detect a first header identifier identifying a first physical layer header portion of the digitized stream;
demodulate and decode the first physical layer header portion to identify a first sub-channel identifier for an associated first physical layer payload;
determine a search location in the digitized stream for a second header identifier detection analysis; and
determine not to perform a header identifier detection analysis in the digitized stream at one or more known header identifier locations between the first physical layer header portion and the search location, responsive to the first sub-channel identifier.
5 Assignments
0 Petitions
Accused Products
Abstract
Systems, devices, processors, and methods are described for the transmission and reception of broadband signals between a gateway and subscriber terminals via satellite. In one set of embodiments, a wireless signal is generated and transmitted including a series of frames including a physical layer header and payload. A sub-channel identifier may be included in the physical layer header to identify the sub-channel for the payload, and allow for various novel filtering techniques at the subscriber terminal. The frames may be generated to be of substantially equal duration. Novel subscriber terminal configurations are described to leverage this formatting.
42 Citations
34 Claims
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1. A terminal to receive a signal transmitted by a satellite, the terminal comprising:
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a receiver configured to receive the signal transmitted by the satellite; and a header processor, communicatively coupled with the receiver, and configured to; receive a digitized stream comprising a physical layer signal representative of the received signal, the digitized stream including a plurality of physical layer headers spaced substantially equidistant in time and each associated with a respective physical layer payload; analyze the digitized stream to detect a first header identifier identifying a first physical layer header portion of the digitized stream; demodulate and decode the first physical layer header portion to identify a first sub-channel identifier for an associated first physical layer payload; determine a search location in the digitized stream for a second header identifier detection analysis; and determine not to perform a header identifier detection analysis in the digitized stream at one or more known header identifier locations between the first physical layer header portion and the search location, responsive to the first sub-channel identifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 25, 26)
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14. A processor for processing a digitized representation of a signal received from a satellite, the processor comprising:
a header processor configured to; receive a digitized stream comprising a physical layer signal representative of the received signal, the digitized stream including a plurality of physical layer headers spaced substantially equidistant in time and each associated with a respective physical layer payload; analyze the digitized stream to detect a first header identifier identifying a first physical layer header portion of the digitized stream; demodulate and decode the first physical layer header portion to identify a first sub-channel identifier for an associated first physical layer payload; determine one or more subsequent headers having different sub-channel identifiers from the first sub-channel identifier, the determination based at least in part on the first sub-channel identifier; and determine not to perform a header identifier detection analysis at known header identifier locations for the determined one or more subsequent headers. - View Dependent Claims (27)
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15. A satellite communications system comprising:
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a gateway configured to transmit a signal to a satellite for retransmission to a terminal; the satellite, communicatively coupled with the terminal and the gateway, and configured to receive the signal from the gateway and retransmit the signal to the terminal; and the terminal comprising; a receiver configured to receive the signal transmitted by the satellite; a header processor communicatively coupled with the receiver and configured to; receive a digitized stream comprising a physical layer signal representative of the signal, the digitized stream including a plurality of physical layer headers spaced substantially equidistant in time and each associated with a respective physical layer payload; analyze the digitized stream to detect a first header identifier identifying a first physical layer header portion of the digitized stream; demodulate and decode the first physical layer header portion to identify a first sub-channel identifier for an associated first physical layer payload; determine, responsive to the first sub-channel identifier, one or more subsequent header identifier locations in the digitized stream that have other sub-channel identifiers different from the first sub-channel identifier; and omit an identifier detection analysis at the determined one or more header identifier locations; and a filter communicatively coupled with the header processor, and configured to exclude from demodulation and decoding one or more physical layer payloads located in the digitized stream and associated with the other sub-channel identifiers.
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16. A method of processing a digital representation of a signal received from a satellite, the method comprising:
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detecting a first header identifier identifying a physical layer header portion of a digitized stream, the digitized stream comprising a physical layer signal representative of the signal received from the satellite; demodulating and decoding the first physical layer header portion to identify a first sub-channel identifier associated with a first physical layer payload; identifying the first physical layer payload as a portion of the digitized stream to be demodulated and decoded responsive to the first sub-channel identifier; identifying, responsive to the first sub-channel identifier, other physical layer payloads of the digitized stream associated with other sub-channel identifiers different from the first sub-channel identifier; and determining not to perform demodulation and decoding of the other physical layer payloads associated with the other sub-channel identifiers. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 28)
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29. A method to receive a signal transmitted by a satellite, the method comprising:
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receiving a digitized stream comprising a physical layer signal representative of the received signal, the digitized stream including a plurality of physical layer headers spaced substantially equidistant in time and each associated with a respective physical layer payload; analyzing the digitized stream to detect a first physical layer header portion of the digitized stream; processing the first physical layer header portion to identify a first sub-channel identifier for an associated first physical layer payload; determining a search location in the digitized stream for a second header identifier detection analysis; and determining, responsive to the first sub-channel identifier, not to perform a header detection analysis in the digitized stream at one or more known header identifier locations between the first physical layer header portion and the search location. - View Dependent Claims (30, 31)
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32. A terminal to receive a signal transmitted by a satellite, the terminal comprising:
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means for receiving a digitized stream comprising a physical layer signal representative of the received signal, the digitized stream including a plurality of physical layer headers spaced substantially equidistant in time and each associated with a respective physical layer payload; means for analyzing the digitized stream to detect a first header identifier identifying a first physical layer header portion of the digitized stream; means for processing the first physical layer header portion to identify a first sub-channel identifier for an associated first physical layer payload; means for determining a search location in the digitized stream for a second header identifier detection analysis; and means for determining not to perform a header identifier detection analysis in the digitized stream at one or more known header identifier locations between the first physical layer header portion and the search location responsive to the first sub-channel identifier. - View Dependent Claims (33, 34)
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Specification