JP3992240B2

5G,4G,3G

Title

Transmission using antenna array in CDMA communication system

Application Number:

JP20050070660

Publication Date:

17-10-2007

Current Assignee:

INTERDIGITAL INC

Family ID:

23559015

Application Date:

14-03-2005

Declaring Company:

INTERDIGITAL INC

Publication Country:

US

Priority Date:

10-09-1999

View on Espacenet goto-link

Title

Transmission using antenna array in CDMA communication system

Application Number:

JP20050070660

Family ID:

23559015

Publication Country:

US

Publication Date:

17-10-2007

Application Date:

14-03-2005

Priority Date:

10-09-1999

Current Assignee:

INTERDIGITAL INC

Declaring Company:

INTERDIGITAL INC

View on Espacenet goto-link

Abstract  Abstract

PROBLEM TO BE SOLVED: To further improve quality of a reception signal without increasing a transmission power level in a code division multiple access (CDMA) communication system.

SOLUTION: Each antenna transmits a different pilot signal having a pseudo random chip code sequence. A receiver filters each transmitted pilot using that pilots chip code. The filtered pilots are weighted and combined. Each pilot signals weight is adaptively adjusted in part based on a signal quality of the combined signal. A data signal is transmitted such that different spread spectrum versions of the data signal are transmitted from each transmitting antenna. Each spread spectrum version has a different chip code identifier. Upon reception each spread spectrum version is filtered with its associated chip code. The filtered spread spectrum versions are weighted in accordance with the adjusted weights associated with the pilot signal of the respective antenna.

COPYRIGHT: (C)2005JPO&NCIPI

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

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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.

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