Asymmetrical forward/reverse transmission bandwidth
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United States of America Patent
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May 4, 2010
Grant Date -
Sep 16, 2004
app pub date -
Mar 26, 2004
filing date -
Feb 10, 2000
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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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