USE OF TIMING AND SYNCHRONIZATION OF AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEX IN COMBINED SATELLITE-TERRESTRIAL NETWORK
First Claim
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1. A method of transmitting a data signal from a plurality of transmitters to a receiver, comprising:
- operating each one of the plurality of transmitters to transmit a data signal on a plurality of orthogonal sub-carrier frequencies to the receiver, wherein at least one of the transmitters is on a satellite and the plurality of transmitters are geographically spread out, the receiver receiving an impaired copy of the data signal from at least one of the plurality of transmitters; and
synchronizing the plurality of transmitters so that the receiver receives impaired copies of the data substantially simultaneously, wherein the receiver employs the impaired copies of the data to reconstitute the data signal.
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Accused Products
Abstract
A system and a method of communicating a data signal in a network of geographically spread out transceivers including a plurality of transmitters. At least one of the transmitters is on a satellite. The plurality of transmitters communicate wirelessly with a receiver. Each of the plurality of transmitters transmits a copy of the data signal on a plurality of orthogonal sub-carrier frequencies to the receiver. The plurality of transmitters are synchronized so that the receiver receives the copies of the data signal substantially simultaneously.
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Citations
16 Claims
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1. A method of transmitting a data signal from a plurality of transmitters to a receiver, comprising:
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operating each one of the plurality of transmitters to transmit a data signal on a plurality of orthogonal sub-carrier frequencies to the receiver, wherein at least one of the transmitters is on a satellite and the plurality of transmitters are geographically spread out, the receiver receiving an impaired copy of the data signal from at least one of the plurality of transmitters; and
synchronizing the plurality of transmitters so that the receiver receives impaired copies of the data substantially simultaneously, wherein the receiver employs the impaired copies of the data to reconstitute the data signal. - View Dependent Claims (2, 3)
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4. A method of transmitting a data signal from a transmitter to a plurality of receivers, comprising:
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operating the transmitter to transmit a data signal on a plurality of orthogonal sub-carrier frequencies to the plurality of receivers, wherein at least one of the receivers is on a satellite and the plurality of receivers are geographically spread out, at least some of the receivers receiving an impaired copy of the data signal;
comparing the impaired copies of the data signal; and
combining the impaired copies of the data so as to reconstitute the data signal. - View Dependent Claims (5, 6, 7)
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8. A system for communicating data signals in a network of transceivers, comprising:
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a receiver; and
a plurality of transmitters configured to communicate wirelessly with the receiver, wherein at least one of the transmitters is on a satellite and the plurality of transmitters are geographically spread out, wherein the plurality of transmitters are configured to transmit a data signal on a plurality of orthogonal sub-carrier frequencies to the receiver, the receiver receiving an impaired copy of the data signal from at least one of the plurality of transmitters, wherein the plurality of transmitters are configured to be synchronized so that the receiver receives impaired copies of the data substantially simultaneously, and wherein the receiver is further configured to employ the impaired copies of the data to reconstitute the data signal. - View Dependent Claims (9, 10)
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11. A system for communicating data signals in a network of transceivers, comprising:
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a plurality of receivers, wherein at least one of the receivers is on a satellite and the plurality of receivers are geographically spread out; and
a transmitter configured to communicate wirelessly with the plurality of receivers, the transmitter being configured to transmit a data signal on a plurality of orthogonal sub-carrier frequencies to the plurality of receivers, at least some of the receivers receiving an impaired copy of the data signal; and
a combination unit in communication with the plurality of receivers, the combination unit being configured to combine the impaired copies of the data so as to reconstitute the data signal. - View Dependent Claims (12, 13, 14)
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15. A network of transmitters, comprising:
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a plurality transmitters configured to communicate wirelessly with a receiver, wherein at least one of the transmitters is on a satellite and the plurality of transmitters are geographically spread out, and each of the plurality of transmitters is configured to transmit a copy of a data signal on a plurality of orthogonal sub-carrier frequencies to the receiver, and wherein the plurality of transmitters are configured to be synchronized so that the receiver receives the copies of the data signal substantially simultaneously.
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16. A network of receivers, comprising:
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a plurality of receivers, wherein at least one of the receivers is on a satellite and the plurality of receivers are geographically spread out, and each receiver is configured to receive a copy of a data signal from a transmitter, the copy of the data signal being transmitted on a plurality of orthogonal sub-carrier frequencies; and
a combination unit in communication with the plurality of receivers, the combination unit being configured to combine the copies of the data signal received by the receivers.
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Specification