Introduction to MIMO MIMOwithOFDM).pdf¢  Introduction to MIMO OFDM ... OFDM and MIMO and there are many

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Text of Introduction to MIMO MIMOwithOFDM).pdf¢  Introduction to MIMO OFDM ... OFDM and MIMO and...

  • Fire Tom Wada

    Professor, Information Engineering, Univ. of the Ryukyus

    Chief Scientist at Magna Design Net, Inc

    wada@ie.u-ryukyu.ac.jp

    http://www.ie.u-ryukyu.ac.jp/~wada/

    2016/2/1 1Fire Tom Wada, Univ. of the Ryukyus

    Introduction to MIMO OFDM

  • • REVIEW

    2016/2/1 Fire Tom Wada, Univ. of the Ryukyus 2

    Section 1

  • SISO Channel

    2016/2/1 3

    Base Stat ion

    Mobile

    Recept ion

    Path 2

    Path 3

    Direct Path

    Building

    Transmission Antenna

    Reception Antenna

    Single Input and Single Output

    (SISO) Channel

    Fire Tom Wada, Univ. of the Ryukyus

  • Base Station Receiver

    Two path Multi path Channel Example

    2016/2/1 Fire Tom Wada, Univ. of the Ryukyus 4

    Channel Impulse Response = [1, 0.5 , 0, 0]

  • Two path Multi path Channel Example

    2016/2/1 Fire Tom Wada, Univ. of the Ryukyus 5

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    X

    X

    X

    Y

    Y

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    X

    X

    X

    X

    IFFTChannelFFT

    Y

    Y

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    

    

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    If time domain channel matrix is cyclic, Frequency Domain Channel Matrix is diagonal!

  • Additive Noise

    2016/2/1 6

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    noise

    noise

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    Fire Tom Wada, Univ. of the Ryukyus

  • How to recover sending signal from receiver signal. - EQUALIZE -

    2016/2/1 Fire Tom Wada, Univ. of the Ryukyus 7

       

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    IFFTChannelFFT

    Y

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    Y

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    NoiseIgnore 

  • Summary of Matrix model of OFDM

    2016/2/1 Fire Tom Wada, Univ. of the Ryukyus 8

    Transmission Antenna

    Reception Antenna

    Channel

       

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    Channel

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