DE69535615T2

5G,4G,3G,2G

Title

Not Available

Application Number:

DE1995635615T

Publication Date:

10-07-2008

Current Assignee:

INTERDIGITAL INC

Family ID:

23162506

Application Date:

31-08-1995

Declaring Company:

INTEL CORP , INTERDIGITAL INC

Publication Country:

US

Priority Date:

06-09-1994

View on Espacenet goto-link

Title

Not Available

Application Number:

DE1995635615T

Family ID:

23162506

Publication Country:

US

Publication Date:

10-07-2008

Application Date:

31-08-1995

Priority Date:

06-09-1994

Current Assignee:

INTERDIGITAL INC

Declaring Company:

INTEL CORP , INTERDIGITAL INC

View on Espacenet goto-link

Abstract  Abstract

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.

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.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.

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