Changes between Version 2 and Version 3 of WARPLab/Examples/MIMO_OFDM


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Timestamp:
Aug 25, 2015, 2:31:34 PM (9 years ago)
Author:
chunter
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  • WARPLab/Examples/MIMO_OFDM

    v2 v3  
    11[[TracNav(WARPLab/TOC)]]
    2 = WARPLab 7 Example: SISO OFDM =
    3 File: [source:/ResearchApps/PHY/WARPLAB/WARPLab7/M_Code_Examples/wl_example_siso_ofdm_txrx.m wl_example_siso_ofdm_txrx.m]
     2= WARPLab 7 Example: MIMO OFDM =
     3File: [source:/ResearchApps/PHY/WARPLAB/WARPLab7/M_Code_Examples/wl_example_mimo_ofdm_txrx.m wl_example_mimo_ofdm_txrx.m]
    44
    5 This WARPLab example implements a simple OFDM transmitter and receiver. The script can run with or without WARP hardware in the loop and does not require any extra MATLAB toolboxes.
     5This WARPLab example implements a simple 2x2 MIMO OFDM transmitter and receiver. The script can run with or without WARP hardware in the loop and does not require any extra MATLAB toolboxes.
    66
    7 '''Important:''' this script is not intended as a tutorial of OFDM. If you're not already familiar with the basics of OFDM please start with one of the many good [https://www.google.com/search?q=ofdm+tutorial OFDM tutorials] available online. You will need to know the basics of OFDM before understanding the Tx and Rx processing in this example.
    8 
    9 == Transmitter ==
    10 [[Image(wl_ofdm_blkDiag_Tx.png, nolink)]]
    11 
    12 The OFDM transmitter code implements the following functions:
    13  * Random data generation
    14  * Modulation of random data to complex constellation symbols
    15  * Mapping of symbols to data-bearing subcarriers
    16  * Insertion of pilot tones in pilot subcarriers
    17  * Inverse fast Fourier transform (IFFT)
    18  * Cyclic prefix insertion
    19  * Preamble construction and insertion
    20  * Interpolation by 2x
    21 
    22 
    23 == Receiver ==
    24 [[Image(wl_ofdm_blkDiag_Rx.png, nolink)]]
    25 
    26 The OFDM receiver code implements the following functions:
    27  * LTS correlation for synchronization
    28  * CFO estimation and correcting use time-domain estimation from LTS
    29  * Cyclic prefix removal
    30  * Fast Fourier transform (FFT)
    31  * Channel estimation from frequency-domain LTS
    32  * Residual phase error estimation from frequency-domain pilot tones
    33  * Equalization of data-bearing subcarriers using channel estimates and phase error estimates
    34  * Demodulation of complex symbols to data values
     7This example extends the [wiki:WARPLab/Examples/OFDM SISO OFDM example]. Users are encouraged to read and test that example before moving on to this MIMO variant.
    358
    369== Running the Example ==