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US 5,351,269 AGranted
Overlaying spread spectrum CDMA personal communications system
AssigneeSCS Mobilecom, Inc.
InventorDonald L. Schilling
Life of this patent
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AssigneeSCS Mobilecom, Inc.
InventorDonald L. Schilling
Estimating the term…
A spread spectrum CDMA communications system for communicating data and/or digitized voice between a plurality of users to a plurality of PCN units. The spread spectrum communications system is located within a same geographical region as occupied by an existing FDMA, proposed TDMA or any other mobile cellular system. The spread spectrum CDMA communications system includes a plurality of PCN-base stations and a plurality of PCN units. A PCN-base station has a comb filter for notch filtering predetermined channels of the mobile cellular system, 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 transmitter for transmitting the spread spectrum processed converted data from the PCN-base station to a PCN unit. The PCN-base station also has an antenna, and spread spectrum detectors for recovering data communicated from the PCN units. A PCN unit has an antenna, and a detector coupled to the antenna for recovering data communicated from the PCN-base station. The detector includes a spread spectrum demodulator. Also, the PCN unit has a device for converting the format of the data into a form suitable for communicating over radio waves, a spread spectrum modulator and a transmitter.
A spread spectrum CDMA communications system for communicating data, including digitized voice signals, between a plurality of PCN units, said spread spectrum communications system located within a same geographical region as occupied by a mobile cellular system with each cell of the mobile cellular system having a cellular bandwidth divided into predetermined channels and guard bands between the predetermined channels, and having cellular-users communicating on the predetermined channels, said spread spectrum CDMA communications system communicating on the predetermined channels, comprising:
A spread spectrum CDMA communications system for communicating data including digitized voice signals, between a plurality of PCN units, said spread spectrum communications system located within a same geographical region as occupied by a mobile cellular system with each cell of the mobile cellular system having a cellular bandwidth divided into predetermined channels and guard bands between the predetermined channels, and having cellular-users communicating on the predetermined channels, said spread spectrum CDMA communications system communicating on the predetermined channels, comprising:
A spread-spectrum receiver for use with a PCN-base station of a spread spectrum CDMA communications system for communicating data including digitized voice signals, between a plurality of PCN units, said spread spectrum communications system located within a same geographical region as occupied by a mobile cellular system with each cell of the mobile cellular system having a cellular bandwidth divided into a plurality predetermined channels and guard bands between the predetermined channels, and having a plurality of cellular-users communicating on the predetermined channels, said spread-spectrum coma communications system communicating on the predetermined channels, said spread-spectrum receiver comprising:
A method, using a spread spectrum CDMA communications system, for communicating data, including digitized voice signals, between a plurality of PCN units and a PCN-base station located with a same geographical region as occupied by a mobile cellular system with each cell of the mobile cellular system having a cellular bandwidth divided into predetermined channels and guard bands between the predetermined channels and having cellular-users communicating on the predetermined channels, said spread spectrum CDMA communications system communicating on the predetermined channels, said method comprising the steps of:
A method, using a spread spectrum receiver, for use with a PCN-base station of a spread spectrum CDMA communications system, for communicating data, including digitized voice signals, between a plurality of PCN units and a PCN-base station located with a same geographical region as occupied by a mobile cellular system with each cell of the mobile cellular system having a cellular bandwidth divided into predetermined channels and guard bands between the predetermined channels and having cellular-users communicating on the predetermined channels, said spread spectrum CDMA communications system communicating on the predetermined channels, said method comprising the steps of:
Dependencies are inferred from the claim text.