Spectral Efficiency

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  • #6725
    Naser
    Participant

    Dear Fjolla,

    The spectral efficiency shown in the results file is in bpch.
    So, if we want it in b/s/Hz, should we multiply this value by ‘average_RBs_per_TTI’ only ?

    Thanks,
    Naser

    #6886
    Farhan
    Participant

    Dear Fjolla,

    I have the same question as imposed above.

    Regards,
    Farhan

    #7045

    Dear Naser, dear Fahran,

    Our simulator measures the spectral efficiency in [bit/channel use]. The amount of channel uses (CUs) in a given transmission time interval (TTI) is calculated as 12 x 14 x (total number of assigned resource blocks (RBs) in this TTI), where the numbers 12 and 14 refer to the number of subcarriers and OFDM symbols in one RB and TTI, respectively.

    Best regards,
    Fjolla

    #7078
    Naser
    Participant

    Thanks Fjolla,

    But how can we convert it to bit/sec/Hz ?

    Thanks
    Naser

    #7083

    Dear Naser,

    To generate the spectral efficiency in bit/s/Hz you have to divide the number of total bits by [TTI size times number of RBs times size of one RB]. The corresponding modification can be done in +traces/ueTrace.m.

    Best regards,
    Fjolla

    #7471
    FX6300
    Participant

    Dear Fjolla,

    TTI size = 1 ms = 0.001 seconds
    Number of RBs = sum(double(obj.assigned_RBs(TTIs_to_account_for))) (as in the spectral_efficiency_bit_per_cu equation)
    Size of RB = 180 kHz

    Therefore, the only change is an amount of 180/164.
    Is that correct?

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