A channel estimation device for OFDM system and its channel estimation method

A channel estimation device for OFDM system and its channel estimation method

  • CN 101,188,593 A
  • Filed: 12/19/2007
  • Published: 05/28/2008
  • Est. Priority Date: 12/19/2007
  • Status: Active Application
First Claim
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1. the channel estimating apparatus of an ofdm system, comprise the delay spreading parameter estimation module, be used to estimate the delay spreading parameter value, it is characterized in that, described channel estimating apparatus also comprises:

  • delay spreading parameter threshold settings module, comparison module, very first time direction channel estimation module, first frequency direction channel estimation module, second frequency direction channel estimation module, the second time orientation channel estimation module;

    Described delay spreading parameter threshold settings module is used to set a delay spreading parameter threshold value;

    Described comparison module, link to each other with described delay spreading parameter estimation module and described delay spreading parameter threshold settings module, the delay spreading parameter and the described delay spreading parameter threshold value that are used for estimating compare, and export an enable signal according to comparative result;

    Described very first time direction channel estimation module links to each other with described comparison module, is used for carrying out the time orientation channel estimating according to the enable signal of described comparison module output;

    Described first frequency direction channel estimation module links to each other with described very first time direction channel estimation module, is used for carrying out the frequency direction channel estimating according to described very first time direction channel estimation module channel estimation results;

    Described second frequency direction channel estimation module links to each other with described comparison module, is used for carrying out the frequency direction channel estimating according to the enable signal of described comparison module output;

    The described second time orientation channel estimation module links to each other with described second frequency direction channel estimation module, is used for carrying out the time orientation channel estimating according to described second frequency direction channel estimation module channel estimation results.

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