Overlaying spread-spectrum satellite system and method
First Claim
1. A spread-spectrum satellite system for communicating data from a satellite to a plurality of remote pager units, said spread-spectrum satellite system having said plurality of remote pager units located in a same geographical region as covered by a mobile-satellite system, with the mobile-satellite system having a mobile bandwidth and having mobile-satellite users communicating using the mobile bandwidth, said spread-spectrum satellite system overlaying in spectrum the mobile bandwidth for simultaneous communication of mobile-satellite satellite voice and spread-spectrum satellite paging information, said spread-spectrum satellite system comprising:
- a satellite, having an antenna beamwidth overlaying the same geographical region as covered by said mobile-satellite system, for communicating data to the plurality of remote pager units;
system means for converting a format of the data into a form suitable for communicating over radio waves;
system-product means for spread-spectrum processing the converted data;
system means for transmitting across at least part of the mobile bandwidth, simultaneously and non-interferingly with a transmission from said mobile-satellite system on the same part of the mobile bandwidth, the spread-spectrum-processed-converted data from the satellite to a respective one of the plurality of remote pager units; and
a plurality of remote pager units, located within the same geographical area as covered by said mobile-satellite system, for receiving on the same part of the mobile bandwidth the spread-spectrum-processed-converted data, each of said remote pager units including,a remote antenna; and
remote-detection means coupled to said remote antenna for recovering data communicated from said satellite.
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Accused Products
Abstract
A spread-spectrum satellite system for communicating data and paging messages to a plurality of remote units. The spread-spectrum communications system has a satellite with an antenna beamwidth located within a same geographical region as covered by an existing FDMA, TDMA or other mobile-satellite system. The spread-spectrum satellite system has a device for converting the format of the data into a form suitable for communicating over radio waves, a spread-spectrum modulator for spread-spectrum processing the data, and a transmitter for transmitting the spread-spectrum-processed-converted data from the satellite to a remote unit. The remote unit has an antenna and a spread-spectrum receiver for recovering data communicated from the satellite. The remote unit optionally may have a comb filter for notch filtering mobile channels of the mobile-satellite system.
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Citations
25 Claims
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1. A spread-spectrum satellite system for communicating data from a satellite to a plurality of remote pager units, said spread-spectrum satellite system having said plurality of remote pager units located in a same geographical region as covered by a mobile-satellite system, with the mobile-satellite system having a mobile bandwidth and having mobile-satellite users communicating using the mobile bandwidth, said spread-spectrum satellite system overlaying in spectrum the mobile bandwidth for simultaneous communication of mobile-satellite satellite voice and spread-spectrum satellite paging information, said spread-spectrum satellite system comprising:
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a satellite, having an antenna beamwidth overlaying the same geographical region as covered by said mobile-satellite system, for communicating data to the plurality of remote pager units; system means for converting a format of the data into a form suitable for communicating over radio waves; system-product means for spread-spectrum processing the converted data; system means for transmitting across at least part of the mobile bandwidth, simultaneously and non-interferingly with a transmission from said mobile-satellite system on the same part of the mobile bandwidth, the spread-spectrum-processed-converted data from the satellite to a respective one of the plurality of remote pager units; and a plurality of remote pager units, located within the same geographical area as covered by said mobile-satellite system, for receiving on the same part of the mobile bandwidth the spread-spectrum-processed-converted data, each of said remote pager units including, a remote antenna; and remote-detection means coupled to said remote antenna for recovering data communicated from said satellite. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A spread-spectrum satellite paging system for communicating data in a same geographical region as covered by a mobile-satellite system, with the mobile-satellite system having a mobile bandwidth divided into a plurality of mobile channels separated by a plurality of guard bands, respectively, and having mobile-satellite users communicating on the plurality of mobile channels, said spread-spectrum satellite paging system overlaying in spectrum the mobile bandwidth, said spread-spectrum satellite paging system comprising:
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a satellite for communicating data across at least part of the mobile bandwidth, simultaneously and non-interferingly with a transmission from said mobile-satellite system on the same part of the mobile bandwidth; and a plurality of remote units, located within the same geographical region as covered by the mobile-satellite system, for receiving the data from the satellite, each of said plurality of remote units including, a remote antenna; remote-filter means coupled to said remote antenna for notch filtering the plurality of mobile channels; and remote-detection means coupled to said remote-filter means, for recovering the data communicated from said satellite. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A remote unit for use with a spread-spectrum satellite system for receiving data from a satellite, said spread-spectrum satellite system having a plurality of remote units located within a same geographical region as covered by a mobile-satellite system, with the mobile-satellite system having a plurality of mobile-satellite users communicating on a plurality of mobile channels, said spread-spectrum satellite system overlaying in spectrum the plurality of mobile channels for communicating with the plurality of remote units simultaneously and non-interferingly with communications between the plurality of mobile-satellite users, said remote unit comprising:
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a remote antenna; a comb filter for notch filtering the plurality of mobile channels; and a spread-spectrum receiver for recovering data communicated from said satellite.
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14. A method, using a spread-spectrum satellite system, for communicating data from a satellite to a plurality of remote units, said spread-spectrum satellite system having said plurality of remote units located within a same geographical region as covered by a mobile-satellite system, with the mobile-satellite system having a mobile bandwidth and a plurality of mobile-satellite users communicating on the mobile bandwidth, said spread-spectrum satellite system communicating with said plurality of remote units simultaneously and non-interferingly with the mobile-satellite system communicating with the plurality of mobile-satellite users, and using at least part of the same mobile bandwidth, said method comprising the steps of:
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converting a format of the data into a form suitable for communicating over radio waves; spread-spectrum processing the converted data; transmitting, from said satellite, the spread-spectrum-processed-converted-data as a data signal across at least part of the mobile bandwidth; receiving the data signal; and recovering, at a remote unit, the data from the data signal. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A method, using a spread-spectrum receiver, for receiving spread-spectrum signals containing data at a remote unit of a spread-spectrum satellite paging system, said spread-spectrum satellite paging system having a plurality of remote units located within a same geographical region as covered by a mobile-satellite system, with the mobile satellite system having a mobile bandwidth divided into a plurality of mobile channels separated by a plurality of guard bands, respectively, and having a plurality of mobile-satellite users communicating on the plurality of mobile channels, respectively, said spread-spectrum satellite paging system communicating with said plurality of remote units simultaneously and non-interferingly with the mobile-satellite system communicating with the plurality of mobile-satellite users, and using at least part of the same mobile bandwidth, said method comprising the steps of:
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receiving the spread-spectrum signals transmitted over at least a part of the mobile bandwidth; notch filtering at the plurality of mobile channels; and recovering the data from the spread-spectrum signals. - View Dependent Claims (21)
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22. A spread-spectrum satellite paging system for communicating paging data from a satellite to a plurality of remote pager units, said spread-spectrum satellite paging system having said plurality of remote pager units located in a same geographical region as covered by a mobile-satellite system, with the mobile-satellite system having a mobile bandwidth and having mobile-satellite users communicating using the mobile bandwidth, said spread-spectrum satellite system comprising:
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a satellite, having an antenna beamwidth overlaying the same geographical region as covered by said mobile-satellite system, for communicating paging data to the plurality of remote pager units; system means for converting a format of the paging data into a form suitable for communicating over radio waves; system-product means for spread-spectrum processing the converted paging data as spread-spectrum-processed paging data; system means for transmitting across the mobile bandwidth, simultaneously and non-interferingly with a transmission from said mobile-satellite system, the spread-spectrum-processed paging data from the satellite to a respective one of the plurality of remote pager units; and a plurality of remote pager units, located within the same geographical area as covered by said mobile-satellite system, for receiving on the mobile bandwidth the spread-spectrum-processed paging data, each of said remote pager units including, a remote antenna; and remote-detection means coupled to said remote antenna for recovering the paging data communicated from said satellite.
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23. A method, using a spread-spectrum satellite paging system, for communicating paging data from a satellite to a plurality of remote paging units, said spread-spectrum satellite system having said plurality of remote paging units located within a same geographical region as covered by a mobile-satellite system, with the mobile-satellite system having a mobile bandwidth and a plurality of mobile-satellite users communicating on a plurality of mobile channels within the mobile bandwidth, said method comprising the steps of:
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converting a format of the paging data into a form suitable for communicating over radio waves; spread-spectrum processing the converted paging data; transmitting, from said satellite, the spread-spectrum-processed-converted-paging data as a data signal using the mobile bandwidth, said data signal transmitted simultaneously and non-interferingly with a mobile-satellite-system communication signal transmitted using the mobile bandwidth; receiving the data signal at a remote unit; notch filtering at the plurality of mobile channels; and recovering, at the remote unit, the paging data from the data signal. - View Dependent Claims (24, 25)
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Specification