Method and apparatus for processing air-borne digital data received in a motor vehicle
First Claim
1. A method of communicating data in a satellite digital audio radio (SDAR) system, said method comprising:
- transmitting two radio frequency digital signals from respective satellites to each of a plurality of SDAR receivers, the two signals including substantially identical information, each of said SDAR receivers being disposed within a respective one of a plurality of motor vehicles, each of the signals including universal data and group-specific data, the universal data being relevant to each of said SDAR receivers, the group-specific data being relevant to less than all of said SDAR receivers, at least one segment of the group-specific data that is relevant to only a corresponding group of said SDAR receivers being in at least one predetermined time location within one of the two signals;
providing at least one of the SDAR receivers in the corresponding group with information identifying the at least one predetermined time location; and
using said at least one SDAR receiver to;
receive the two radio frequency digital signals;
select the at least one segment of the group-specific data from the at least one predetermined time location within the one of the two signals;
store the at least one segment of the group-specific data in a memory device;
store at least one segment of the universal data from the one of the two signals in the memory device;
combine the stored at least one segment of the group-specific data from the one of the two signals with group-specific data from an other of the two signals to thereby create a group-specific output signal; and
combine the stored at least one segment of the universal data with universal data from the other of the two signals to thereby create a universal output signal.
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Accused Products
Abstract
A method of communicating data in a satellite digital audio radio (SDAR) system includes transmitting two radio frequency digital signals from respective satellites to each of a plurality of SDAR receivers disposed within respective motor vehicles. The two signals include substantially identical information. Each of the signals includes universal data relevant to each of the SDAR receivers, and group-specific data relevant to less than all of the SDAR receivers. At least one segment of the group-specific data that is relevant to only a corresponding group of the SDAR receivers is in at least one predetermined time location within one of the two signals. At least one of the SDAR receivers in the corresponding group receives the two radio frequency digital signals and is provided with information identifying the at least one predetermined time location. The at least one segment of the group-specific data is selected from the at least one predetermined time location within the one of the two signals and is stored in a memory device. At least one segment of the universal data from the one of the two signals is stored in the memory device. The stored at least one segment of the group-specific data from the one of the two signals is combined with group-specific data from an other of the two signals to thereby create a group-specific output signal. The stored at least one segment of the universal data is combined with universal data from the other of the two signals to thereby create a universal output signal.
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Citations
24 Claims
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1. A method of communicating data in a satellite digital audio radio (SDAR) system, said method comprising:
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transmitting two radio frequency digital signals from respective satellites to each of a plurality of SDAR receivers, the two signals including substantially identical information, each of said SDAR receivers being disposed within a respective one of a plurality of motor vehicles, each of the signals including universal data and group-specific data, the universal data being relevant to each of said SDAR receivers, the group-specific data being relevant to less than all of said SDAR receivers, at least one segment of the group-specific data that is relevant to only a corresponding group of said SDAR receivers being in at least one predetermined time location within one of the two signals;
providing at least one of the SDAR receivers in the corresponding group with information identifying the at least one predetermined time location; and
using said at least one SDAR receiver to;
receive the two radio frequency digital signals;
select the at least one segment of the group-specific data from the at least one predetermined time location within the one of the two signals;
store the at least one segment of the group-specific data in a memory device;
store at least one segment of the universal data from the one of the two signals in the memory device;
combine the stored at least one segment of the group-specific data from the one of the two signals with group-specific data from an other of the two signals to thereby create a group-specific output signal; and
combine the stored at least one segment of the universal data with universal data from the other of the two signals to thereby create a universal output signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of communicating air-borne digital data to a motor vehicle, said method comprising:
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transmitting two air-borne digital signals to each of a plurality of receivers, the two signals including substantially identical information, each of said receivers being disposed within a respective one of a plurality of motor vehicles, each of the signals including universal data and group-specific data, the universal data being relevant to each of said receivers, the group-specific data being relevant to less than all of said receivers, at least one segment of the group-specific data that is relevant to only a corresponding group of said receivers being in at least one location within one of the two signals;
providing at least one of the receivers in the corresponding group with information identifying the at least one location; and
using said at least one receiver to;
receive the two air-borne digital signals;
select the at least one segment of the group-specific data from the at least one location within the one of the two signals;
store the at least one segment of the group-specific data in a memory device; and
combine the stored at least one segment of the group-specific data from the one of the two signals with an other of the two signals to thereby create an output signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A receiver in a motor vehicle for receiving air-borne digital data, said receiver comprising:
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at least one antenna configured to receive two air-borne digital signals including substantially identical information, each of the signals including universal data and group-specific data, all of the universal data being relevant to said receiver, the group-specific data including at least one segment that is relevant to said receiver, and at least one segment that is irrelevant to said receiver, the at least one relevant segment being in at least one predetermined time location within one of the two signals;
a memory device storing information identifying the at least one predetermined time location;
a data selecting device operable to select the at least one relevant segment of the group-specific data from the at least one predetermined time location within the one of the two signals;
a memory management device operable to store the at least one relevant segment of the group-specific data in said memory device; and
a data combining device operable to combine the stored at least one relevant segment of the group-specific data from the one of the two signals with an other of the two signals. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification