# Spectral Efficiency

Viewing 6 posts - 1 through 6 (of 6 total)
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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?

Viewing 6 posts - 1 through 6 (of 6 total)
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