Terrestrial Transmitting Station for Transmitting a Terrestrial Broadcast Signal, Satellite-Aided Broadcast System and Receiver for a Satellite-Aided Broadcast System
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Abstract
A terrestrial transmitting station for sending out a terrestrial broadcast signal includes a first receiver for receiving a signal to obtain a satellite receive signal, a second receiver for receiving a local signal to obtain a local receive signal and a signal combiner for combining the first receive signal with the local receive signal to form a combination signal. The signal combiner is implemented to generate the combination signal so that the combination signal is formed according to a hierarchical modulation, wherein the first receive signal is contained in a base layer of the hierarchical modulation and wherein the local receive signal is contained in an overlay layer of the hierarchical modulation. A terrestrial transmitting station further includes a transmitter for sending out the combination signal. A broadcast system includes a first transmitter and at least one terrestrial transmitting station. The information emitted from the satellite-based broadcast system may be received using an associated receiver. An inventive broadcast system allows adding a local information to a supraregionally emitted transmit signal in a frequency-efficient way.
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Citations
87 Claims
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1-63. -63. (canceled)
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64. A broadcast system, comprising:
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a first terrestrial transmitting station for sending out a first terrestrial transmit signal, having an associated first receiver for receiving a first transmit signal to obtain a first receive signal, an associated second receiver for receiving a first local signal to obtain a local receive signal, a signal combiner for combining the first receive signal with the local receive signal to form a combination signal, wherein the signal combiner is implemented to generate the combination signal so that the combination signal is formed according to a hierarchical modulation, wherein the first receive signal is included in a base layer of the hierarchical modulation, and wherein the local receive signal is included in an overlay layer of the hierarchical modulation, and a transmitter for sending out the first combination signal as the first terrestrial transmit signal; and a second terrestrial transmitting station for sending out a second terrestrial broadcast signal, having an associated first receiver for receiving the first transmit signal to obtain an associated receive signal, an associated second receiver for receiving a second local signal, to obtain an associated local receive signal, an associated signal combiner for combining the receive signal with the associated local receive signal to form an associated combination signal, wherein the signal combiner is implemented to generate the associated combination signal so that the associated combination signal is formed according to a hierarchical modulation, wherein the associated receive signal is included in a base layer of the hierarchical modulation, and wherein the associated local receive signal is included in an overlay layer of the hierarchical modulation, and an associated transmitter for sending out the associated combination signal as the second terrestrial transmit signal, wherein the first terrestrial transmitting station and the second terrestrial transmitting station are implemented to receive different local signals, and wherein the first local signal is different from the second local signal; wherein the first terrestrial transmitting station and the second terrestrial transmitting station are implemented so that the combination signal emitted from the first terrestrial transmitting station and the combination signal emitted from the second terrestrial transmitting station comprise an equal carrier frequency and an equal modulation type; wherein the first terrestrial transmitting station and the second terrestrial transmitting station are further implemented or arranged so that an overlapping area exists in which the combination signal emitted from the first terrestrial transmitting station and the combination signal emitted from the second terrestrial transmitting station constructively overlap regarding the base layer of the hierarchical modulation; wherein the carrier frequency of the combination signals emitted from the terrestrial transmitting station is equal to a carrier frequency of a second transmit signal which is a satellite signal and which is receivable in the overlapping area; wherein the first transmit signal comprises a payload data content including a payload data content of the second transmit signal; wherein an information included in the base layer of the signal emitted from the first terrestrial transmitting station is equal to an information included in the base layer of the second transmit signal; and wherein the base layer of the hierarchical modulation of the second transmit signal is equal to the base layer of the hierarchical modulation of the combination signal emitted from the second terrestrial transmitting station. - View Dependent Claims (65, 66, 67, 68, 69, 70, 71, 72, 73)
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74. A broadcast system, comprising:
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a first transmitter which is implemented to emit a first transmit signal; and a first terrestrial transmitting station for sending out a first terrestrial transmit signal, having a first receiver for receiving the first transmit signal to obtain a first receive signal, a second receiver for receiving a first local signal to obtain a local receive signal, a signal combiner for combining the first receive signal with the local receive signal to form a combination signal, wherein the signal combiner is implemented to generate the combination signal so that the combination signal is formed according to a hierarchical modulation, wherein the first receive signal is included in a base layer of the hierarchical modulation, and wherein the local receive signal is included in a overlay layer of the hierarchical modulation, and a transmitter for sending out the first combination signal as the first terrestrial transmit signal. - View Dependent Claims (75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87)
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Specification