Adaptive infinite impulse response (IIR)-based code detection for symbol-level equalizer
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United States of America Patent
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Jan 12, 2016
Grant Date -
Apr 30, 2015
app pub date -
Oct 24, 2013
filing date -
Oct 24, 2013
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Abstract
Code detection to assist a symbol-level equalizer in a receiver is described. In an embodiment, code detection uses adaptive Infinite Impulse Response (IIR) filtering to determine spreading code usage information and active code channels in a received signal. The spreading code usage information indicates if a spreading code associated with a code channel is among spreading codes used in the received signal. In another embodiment, the spreading code usage information is determined based on a forgetting factor associated with the filtering of a symbol power associated with the code channel.
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