Multi-code compressed mode DS-CDMA systems and methods
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United States of America Patent
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Apr 20, 1999
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N/A
app pub date -
Apr 23, 1996
filing date -
May 1, 1995
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Abstract
Introduction of discontinuous transmission in CDMA communications techniques is achieved by selectively using additional spreading codes for spreading a frame of data. By dividing a frame into two or more portions and spreading each portion with a different spreading code, the frame can be transmitted in a compressed mode wherein the information is transmitted during a portion of the frame period, leaving an idle part of the frame in which to perform other functions, such as evaluation of other frequencies for use in handover between frequencies.
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