OFDM inquiry

xian8512
xian8512
@xian8512-q1j37E • Oct 26, 2024

IF there is anyone who works on the OFDM and is interested in the Doppler effect on such a system? Let's discuss about how its performance is affected and the parameter that may evaluate it.

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  • elavarasan
    elavarasan

    @elavarasan-4uyrnr • Aug 20, 2009

    Hi xian8512
    I have not worked in OFDM but iam intrested to know more about it.Can you post some information about this.

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  • xian8512
    xian8512

    @xian8512-q1j37E • Aug 21, 2009

    OFDM is a modulation method and key technology of 4G. And because of its advantages such as the orthogonality of subcarriers and its capability to convert the high-speed Serial data to lower-speed Parallel data,OFDM has better performance in the frequency-selective channel than traditional modulation methods. However, it losses the advantage when there is large frequency offset caused mainly by the asynchronism or the high mobility between the transmitter and receiver. The latter factor is known as the doppler effect which may undermine the orthogonality of subcarriers. So many method are being investigated to avoid such an effect.

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  • elavarasan
    elavarasan

    @elavarasan-4uyrnr • Aug 22, 2009

    thank you for this information

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