Systems and methods for concatenation in spread spectrum systems
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United States of America Patent
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Jan 18, 2011
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app pub date -
Sep 20, 2007
filing date -
Sep 20, 2006
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Abstract
A receiver despreads a spread spectrum sequence by partially despreading the spread spectrum sequence using an outer spreading code, and then despreading the partially despread sequence using an inner spreading code. This can advantageously save processing power. In one embodiment, the outer spreading code is despread with an analog circuit, and an inner spreading code is despread with a digital circuit. A modulator for a transmitter can generate a spread spectrum sequence by direct-sequence spreading data to generate a partially spread sequence and then spreading the partially spread sequence to generate the spread spectrum sequence.
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