Spread-spectrum phase and channel tracking
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United States of America Patent
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Nov 22, 2011
Grant Date -
May 22, 2008
app pub date -
Nov 9, 2007
filing date -
Nov 17, 2006
priority date (Note) -
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Abstract
Common components are used to detect messages from a variety of transmitters, and the characteristics of each detected message are used to dynamically configure the demodulation process for each message. Channelization is selectively performed before, after, or before-and-after de-spreading, depending upon the particular environment and/or the particular characteristics of the received messages. Frequency synchronization to each transmitter is achieved by initializing a tracking loop within the demodulator associated with the transmitter, and code-phase synchronization to each transmitter is achieved by selectively inserting or deleting bits, based on the frequency and code-phase characteristics of the detected message.
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