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Rake reception apparatus and method in a mobile terminal

  • US 7,940,752 B2
  • Filed: 04/13/2007
  • Issued: 05/10/2011
  • Est. Priority Date: 04/13/2006
  • Status: Expired due to Fees
First Claim
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1. A rake reception apparatus for determining whether a paging channel is received in a mobile terminal using a Discontinuous Reception (DRX) mode, the apparatus comprising:

  • a searcher for searching for a multi-path signal using a received signal output from a Radio Frequency (RF) part, and calculating an energy value for each of a plurality of hypotheses;

    a demodulator for demodulating a Paging Indicator (PI) for a hypothesis for which an energy value calculated by the searcher exceeds a valid path threshold; and

    a controller for determining whether a paging channel is received, according to the demodulated signal output from the demodulator, and performing finger allocation using a multi-path search of the searcher if it is determined that the paging channel is transmitted, wherein the demodulator demodulates a PI for each path while searching for the multi-path signal,wherein the demodulator further comprises;

    a channelization code generator for generating a channelization code;

    a multiplier for multiplying an interval in which a PI is located, by the channelization code output from the channelization code generator, for every hypothesis being checked by the searcher;

    a PI accumulator for receiving PI information in a correlation interval of each hypothesis being checked by the searcher, and accumulating a signal in a PI interval;

    a channel compensator for performing channel compensation by multiplying the value accumulated for each hypothesis in the searcher by the accumulated PI value output from the PI accumulator;

    a decider for determining, as a valid path, a hypothesis for which an energy value for each hypothesis, calculated by the searcher, exceeds a valid path threshold; and

    a PI combiner for determining whether combination is possible depending on the validity determination of the decider, and performing combination on a hypothesis having an energy value exceeding a threshold, if combination is possible.

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