InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,710,909
Ozluturk May 4, 2010

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Asymmetrical forward/reverse transmission bandwidth


Abstract
A wireless communications system employs code-division multiple access information transmission techniques where the uplink and downlink transmission bandwidths are unequal. The higher bandwidth is an integer multiple of the lower bandwidth. The present system requires a base station and a subscriber unit to have two pseudo-random code generators which can be clocked separately. Alignment of the uplink and downlink pseudo-random spreading codes is achieved by truncating the code sequence for the lower speed link at the conclusion of a complete code sequence for the higher speed link.


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Inventors: Ozluturk; Fatih M. (Port Washington, NY)
Assignee: InterDigital Communications, LLC (Wilmington, DE)

Appl. No.: 10/810,153
Filed: March 26, 2004

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
09501865 Feb., 2000 6728225


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Current U.S. Class: 370/320 ; 370/328; 370/342; 370/441; 375/140; 455/464
Current International Class: H04B 7/216 (20060101)
Field of Search: 370/203-209,320,328,335,348,342,441,468 455/422.1,464 375/140