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Base station device for wireless communication of OFDM signal including a synchronization control unit

  • US 8,929,191 B2
  • Filed: 06/12/2009
  • Issued: 01/06/2015
  • Est. Priority Date: 07/07/2008
  • Status: Expired due to Fees
First Claim
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1. A base station device configured to perform wireless communication of an OFDM signal with a terminal device and including a built-in clock generator that generates an operating clock, in which accuracy of a carrier frequency of the OFDM signal is affected by accuracy of a clock frequency generated by the built-in clock generator, the base station device comprising:

  • means for receiving a radio signal transmitted from another base station device while transmission to the terminal device is stopped;

    estimation means for determining, based on an OFDM signal received while transmission to the terminal device is stopped, an estimated value of a carrier frequency offset of the OFDM signal as synchronization mismatch between the base station device and another base station device;

    frequency correction means for correcting a carrier frequency of an OFDM signal to be transmitted to the terminal device, based on the estimated value;

    a storage unit for storing history information of synchronization mismatch between the base station device and another base station device; and

    a synchronization control unit for changing a cycle in which transmission to the terminal device is stopped, based on the history information of synchronization mismatch stored in the storage unit.

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