WO2004082165A2

5G,4G,3G

Title

Systems and methods for using code space in spread-spectrum communications

Application Number:

WO2004US06759

Publication Date:

23-09-2004

Current Assignee:

ODENWALDER JOSEPH P , QUALCOMM INC

Family ID:

32995976

Application Date:

05-03-2004

Publication Country:

US

View on Espacenet

Priority Date:

06-03-2003

Declaring Company:

QUALCOMM INC

Abstract  Abstract

Systems and methods for improving the performance of direct-sequence spread-spectrum communication systems. In one embodiment a system comprises at least one communication channel that utilizes two different orthogonal spreading codes and corresponding portions of the available orthogonal code space. Portions of the data processed by the communication channel are demultiplexed (471) into different streams and covered (472 473) with corresponding different orthogonal spreading codes. The streams covered by the different orthogonal codes are then combined (475) and transmitted via the same communication channel. One embodiment utilizes at least two different Walsh codes of different lengths (+ - and + + - -) in order to make use of the three quarters of the Walsh space not utilized by low-rate legacy channels.

Note:

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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.

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

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