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Method and device for transmitting pilot signal

  • US 9,948,562 B2
  • Filed: 04/22/2014
  • Issued: 04/17/2018
  • Est. Priority Date: 04/23/2013
  • Status: Active Grant
First Claim
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1. A method for transmitting a pilot signal, comprising:

  • mapping the pilot signal to a set of even sub-carriers of a first and/or last orthogonal frequency division multiplex symbol to generate a frequency-domain pilot signal;

    or mapping the pilot signal to a set of odd sub-carriers of the first and/or last orthogonal frequency division multiplex symbol to generate a frequency-domain pilot signal;

    modulating the frequency-domain pilot signal in the time domain; and

    transmitting the modulated pilot signal in the first and/or last orthogonal frequency division multiplex symbol of a sub-frame in which the pilot signal is transmitted;

    wherein modulating the frequency-domain pilot signal in the time domain comprises;

    performing frequency domain to time domain conversion on the frequency-domain pilot signal to generate a second time-domain signal, wherein the second time-domain signal has a length of one orthogonal frequency division multiplex symbol, and both a first half of the second time-domain signal and a second half of the second time-domain signal carry the pilot signal; and

    intercepting a segment of continuous time-domain signal from the second time-domain signal to generate a first time-domain signal, wherein the first time-domain signal comprises the first half of the second time-domain signal or the second half of the second time-domain signal, the first time-domain signal is the modulated pilot signal, and the length of the first time-domain signal is less than the length of an orthogonal frequency division multiplex symbol for data transmission, and no less than half the length of data portion in the orthogonal frequency division multiplex symbol for data transmission.

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