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AssigneeInterDigital Technology Corporation
InventorsD. Ridgely Bolgiano, Gilbert E LaVean
Estimating the term…
A wireless communication system combines time and space diversity to reduce fading and simplify receiver design. In particular, a data packet which carries digital telephone traffic, is transmitted at three different times from three different antennas. The mobile subscriber receiver thus receives the same data packet at three different times from three different antennas, and uses the best data packet or combination of the data packets to reduce the effects of fading. A transfer station receives a time division multiplex multiple access (TDMA) signal from a base station carrying telephone data packet traffic to form three data packet repeats at spatially diverse antennas locations. The transfer station further modulates a code division multiple access (CDMA) system using a TDMA signal which links the mobile subscriber receiver to the transfer station. Each data packet received at the transfer station is thus retransmitted at three different times to the mobile subscriber station on a CDMA link. In one embodiment, each transfer station includes the three space diversity antennas. In a second embodiment, three transfer stations, each with one spatially diverse antenna is used. The time division and code division multiplex signals transmitted from space diversity antennas provide the ability to determine subscriber location using the same communication signals which are used for the primary telephone data communication. Specifically, the subscriber station receiver uses the absolute and relative time of arrival of the three repeated data packets to determine the respective distances of the mobile subscriber station to the three transmitting antennas. Since the transmitting antennas are at known fixed locations, receiver location is determined.
In a wireless communication system, wherein a data packet is communicated from a signal source to a subscriber station, said system including a transfer station between said signal source and said subscriber station for receiving said data packet from said signal source and retransmitting said data packet to said subscriber station, said transfer station including a transfer station receiver, first and second transfer station transmitters and first and second antennas spaced apart from each other, a method at said transfer station comprising:
A method in accordance with 3, wherein said data packet is communicated from said signal source to said transfer station by a broadband cable television link.
A method in accordance with 3, wherein said data packet is communicated from said signal source to said transfer station by a fiberoptic cable link.
A method in accordance with 3, wherein said data packet is communicated from said signal source to said transfer station by a pair gain module telephone link.
A method in accordance with 3, wherein said data packet is communicated from said signal source to said transfer station by a twisted pair wire loop telephone link.
In a wireless communication system, wherein a data packet is communicated from a signal source to a subscriber station, said system including first and second transfer stations spaced apart from each other, each said first and second transfer station adapted for receiving said data packet from said signal source and retransmitting said data packet to said subscriber station, said first transfer station including a first transfer station receiver, a first transfer station transmitter and a first transfer station antenna, said second transfer station including a second transfer station receiver, a second transfer station transmitter and a second transfer station antenna, a method comprising:
A method in accordance with 13, wherein said data packet is communicated from said signal source to said transfer station by a broadband cable television link.
A method in accordance with 13, wherein said data packet is communicated from said signal source to said transfer station by a fiberoptic cable link.
A method in accordance with 13, wherein said data packet is communicated from said signal source to said transfer station by a pair gain module telephone link.
A method in accordance with 13, wherein said data packet is communicated from said signal source to said transfer station by a twisted pair wire loop telephone link.
In a wireless communication system wherein a data packet is communicated from a signal source to a subscriber station on a broadcast frequency for over the air transmission, and further including a wideband cable distribution system having a headend coupled to a plurality of spaced apart antennas by a wideband transmission cable, said system including at least one centrally located transfer station at said cable distribution headend, said transfer station adapted for receiving said data packet from said signal source and retransmitting said data packet to said subscriber station by said wideband transmission cable, said wideband cable distribution system further including a first remotely located antenna and a second remotely located antenna disposed at first and second locations spaced apart on said wideband cable distribution cable respectively, a method comprising:
In a wireless communication system, wherein a data packet is communicated from a signal source to a subscriber station, said system including a transfer station between said signal source and said subscriber station for receiving said data packet from said signal source and retransmitting said data packet to said subscriber station, said transfer station including a transfer station receiver, first and second transfer station transmitters and first and second antennas spaced apart from each other, an apparatus at said transfer station comprising:
An apparatus in accordance with 29, wherein said data packet is communicated from said signal source to said transfer station by a broadband cable television link.
An apparatus in accordance with 29, wherein said data packet is communicated from said signal source to said transfer station by a fiberoptic cable link.
An apparatus in accordance with 29, wherein said data packet is communicated from said signal source to said transfer station by a pair gain module telephone link.
An apparatus in accordance with 29, wherein said data packet is communicated from said signal source to said transfer station by a twisted pair wire loop telephone link.
In a wireless communication system, wherein a data packet is communicated from a signal source to a subscriber station, said system including first and second transfer stations spaced apart from each other, each said first and second transfer station adapted for receiving said data packet from said signal source and retransmitting said data packet to said subscriber station, said first transfer station including a first transfer station receiver, a first transfer station transmitter and a first transfer station antenna, said second transfer station including a second transfer station receiver, a second transfer station transmitter and a second transfer station antenna, an apparatus comprising:
An apparatus in accordance with 39, wherein said data packet is communicated from said signal source to said transfer station by a broadband cable television link.
An apparatus in accordance with 39, wherein said data packet is communicated from said signal source to said transfer station by a fiberoptic cable link.
An apparatus in accordance with 39, wherein said data packet is communicated from said signal source to said transfer station by a pair gain module telephone link.
An apparatus in accordance with 39, wherein said data packet is communicated from said signal source to said transfer station by a twisted pair wire loop telephone link.
In a wireless communication system wherein a data packet is communicated from a signal source to a subscriber station on a broadcast frequency for over the air transmission, and further including a wideband cable distribution system having a headend coupled to a plurality of spaced apart antennas by a wideband transmission cable, said system including at least one centrally located transfer station at said cable distribution headend, said transfer station adapted for receiving said data packet from said signal source and retransmitting said data packet to said subscriber station by said wideband transmission cable, said wideband cable distribution system further including a first remotely located antenna and a second remotely located antenna disposed at first and second locations spaced apart on said wideband cable distribution cable respectively, an apparatus comprising:
An apparatus in accordance with 48, wherein said wideband transmission cable is a fiberoptic cable link.
In a TDMA/CDMA cellular wireless communication system, wherein a switching center derives a TDMA data packet from information received from the public switched network, said TDMA data packet communicated to a subscriber station, said system including at least one transfer station, in some cases also a base station, between the said switching center and said subscriber station, said transfer station receiving said TDMA data packet and retransmitting said TDMA data packet enhanced with a spread spectrum code to said subscriber station, said transfer station including a transfer station TDMA data packet receiver, first and second spread spectrum encoder/modulators, first and second spread spectrum transfer station transmitters and first and second antennas spaced apart from each other, a method at said transfer station comprising:
In a TDMA/CDMA cellular wireless communication system, wherein a switching center/central processor derives a TDMA data packet from information received from the public switched network, said TDMA data packet communicated to a subscriber station, said subscriber station receiving said TDMA data packet on a broadcast frequency from an over the air transmission, the TDMA data packet enhanced for over the air transmission with a CDMA spread spectrum modulation, and further including a wideband cable distribution network having a headend coupled to a plurality of spaced apart antennas, said system including at least one centrally located transfer station at said cable distribution headend, said transfer station adapted for receiving said TDMA data packet from either the base station or the switching center/central processor, bandspreading said TDMA data packet with a CDMA spreading code to form a TDMA/CDMA data packet and transmitting said TDMA/CDMA data packet by said wideband transmission cable, wideband cable distribution network further including a first remotely located antenna and a second remotely located antenna disposed at first and second locations spaced apart on said wideband distribution cable respectively, a method comprising:
In a TDMA/CDMA cellular wireless communication system, wherein a switching center derives a TDMA data packet from information received from the public switched network, said TDMA data packet communicated to a subscriber station, said system including at least one transfer station, in some cases also a base station, between the said switching center and said subscriber station, said transfer station receiving said TDMA data packet and retransmitting said TDMA data packet enhanced with a spread spectrum code to said subscriber station, said transfer station including a transfer station TDMA data packet receiver, first and second spread spectrum encoder/modulators, first and second spread spectrum transfer station transmitters and first and second antennas spaced apart from each other, an apparatus at said transfer station comprising:
In a TDMA/CDMA cellular wireless communication system, wherein a switching center/central processor derives a TDMA data packet from information received from the public switched network, said TDMA data packet communicated to a subscriber station, said subscriber station receiving said TDMA data packet on a broadcast frequency from an over the air transmission, the TDMA data packet enhanced for over the air transmission with a CDMA spread spectrum modulation, and further including a wideband cable distribution network having a headend coupled to a plurality of spaced apart antennas, said system including at least one centrally located transfer station at said cable distribution headend, said transfer station adapted for receiving said TDMA data packet from either the base station or the switching center/central processor, bandspreading said TDMA data packet with a CDMA spreading code to form a TDMA/CDMA data packet and transmitting said TDMA/CDMA data packet by said wideband transmission cable, wideband cable distribution network further including a first remotely located antenna and a second remotely located antenna disposed at first and second locations spaced apart on said wideband distribution cable respectively, an apparatus comprising
Dependencies are inferred from the claim text.