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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 including a time division multiplex signal having first and second time slots, and a code division multiplex signal using PN spread spectrum modulation, a method for communicating a data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including first and second antennas spaced apart from each other, said method comprising:
In a wireless communication system including a time division multiplex signal having first, second and third time slots, and a code division multiplex signal using PN spread spectrum modulation, a method for communicating a data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including first, second and third antennas spaced apart from each other, said method comprising:
In a wireless communication system, wherein a data packet is communicated from a base station to a subscriber station, said system including at least one transfer station between said base station and said subscriber station for receiving said data packet from said base station and retransmitting said data packet to said subscriber station on a first antenna to form a first transmitted data packet and retransmitting said data packet on a second antenna to form a second transmitted data packet after said first transmitted data packet, a method in a receiver in said subscriber station for receiving said data packet, said method comprising:
In a wireless communication system including a time division multiplex signal having first and second time slots, and a code division multiplex signal using PN spread spectrum modulation, an apparatus for communicating a data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including first and second antennas spaced apart from each other, said apparatus comprising:
In a wireless communication system including a time division multiplex signal having first, second and third time slots, and a code division multiplex signal using PN spread spectrum modulation, an apparatus for communicating a data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including first, second and third antennas spaced apart from each other, said apparatus comprising:
In a wireless communication system, wherein a data packet is communicated from a base station to a subscriber station, said system including at least one transfer station between said base station add said subscriber station for receiving said data packet from said base station and retransmitting said data packet to said subscriber station on a first antenna to form a first transmitted data packet and retransmitting said data packet on a second antenna to form a second transmitted data packet after said first transmitted data packet, an apparatus in a receiver in said subscriber station for receiving said data packet, said apparatus comprising:
In a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of time slotted PN spread spectrum signals from a plurality of antennas, a method for communicating a PN spread spectrum modulated data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including at least first and second antennas spaced apart from each other, said method comprising:
In a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of time slotted PN spread spectrum signals from a plurality of antennas, a method for communicating a PN spread spectrum modulated data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including at least first second and third antennas spaced apart from each other, said method comprising:
In a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of time slotted PN spread spectrum signals from a plurality of antennas, a method for communicating a PN spread spectrum modulated data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including at least first second and third antennas spaced apart from each other, said method comprising:
In a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of time slotted PN spread spectrum signals from a plurality of antennas, an apparatus for communicating a PN spread spectrum modulated data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including at least first and second antennas spaced apart from each other, said apparatus comprising:
In a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of time slotted PN spread spectrum signals from a plurality of antennas, an apparatus for communicating a PN spread spectrum modulated data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including at least first second and third antennas spaced apart from each other, said apparatus comprising:
In a CDMA cellular system that utilizes transmission diversity by transmitting a plurality of time slotted PN spread spectrum signals from a plurality of antennas, an apparatus for communicating a PN spread spectrum modulated data packet containing digital data from a transmitter to a receiver to form a received data packet, said system including at least first second and third antennas spaced apart from each other, said apparatus comprising:
Dependencies are inferred from the claim text.