Method for mapping downlink dedicated pilots to resource elements in extended cyclic prefix frame structure

  • US 8,391,233 B2
  • Filed: 12/25/2008
  • Issued: 03/05/2013
  • Est. Priority Date: 03/20/2008
  • Status: Active Grant
First Claim
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1. A method for mapping downlink dedicated pilots to resource elements in an Extended Cyclic Prefix (Extended CP) frame, applied in a Long Term Evolution (LTE) system, comprising:

  • mapping the first downlink dedicated pilot of a port to the 5th orthogonal frequency division multiplexing symbol of a physical resource block in the time domain, and to the Ath subcarrier in the frequency domain;

    wherein the physical resource block comprises 12 subcarriers in the frequency domain and 12 orthogonal frequency division multiplexing symbols in the time domain, and wherein A is 1 or 2 or 3;

    mapping the second downlink dedicated pilot to the 5th orthogonal frequency division multiplexing symbol in the time domain, and to the (A+3)th subcarrier in the frequency domain;

    mapping the third downlink dedicated pilot to the 5th orthogonal frequency division multiplexing symbol in the time domain, and to the (A+6)th subcarrier in the frequency domain;

    mapping the fourth downlink dedicated pilot to the 5th orthogonal frequency division multiplexing symbol in the time domain, and to the (A+9)th subcarrier in the frequency domain;

    mapping the fifth downlink dedicated pilot to the 8th orthogonal frequency division multiplexing symbol in the time domain, and to the Bth subcarrier in the frequency domain;

    wherein, B is 1 or 2 or 3;

    mapping the sixth downlink dedicated pilot to the 8th orthogonal frequency division multiplexing symbol in the time domain, and to the (B+3)th subcarrier in the frequency domain;

    mapping the seventh downlink dedicated pilot to the 8th orthogonal frequency division multiplexing symbol in the time domain, and to the (B+6)th subcarrier in the frequency domain;

    mapping the eighth downlink dedicated pilot to the 8th orthogonal frequency division multiplexing symbol in the time domain, and to the (B+9)th subcarrier in the frequency domain;

    mapping the ninth downlink dedicated pilot to the 12th orthogonal frequency division multiplexing symbol in the time domain, and to the Cth subcarrier in the frequency domain;

    wherein, C is 1 or 2 or 3;

    mapping the tenth downlink dedicated pilot to the 12th orthogonal frequency division multiplexing symbol in the time domain, and to the (C+3)th subcarrier in the frequency domain;

    mapping the eleventh downlink dedicated pilot to the 12th orthogonal frequency division multiplexing symbol in the time domain, and to the (C+6)th subcarrier in the frequency domain;

    mapping the twelfth downlink dedicated pilot to the 12th orthogonal frequency division multiplexing symbol in the time domain, and to the (C+9)th subcarrier in the frequency domain; and

    transmitting the Extended CP frame with the downlink dedicated pilots to a user equipment;

    wherein, only one port of downlink dedicated pilots is transmitted in the physical resource block.

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