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compute SINR #269

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845756518 opened this issue Jun 21, 2023 · 3 comments
Open

compute SINR #269

845756518 opened this issue Jun 21, 2023 · 3 comments

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@845756518
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What is the calculation process of SINR and what are the parameters? I use the path loss model MmWavePropagationLossModel and the channel model ThreeGppSpectrumPropagationLossModel and find that SINR does not decrease as the distance between ue and bs increases, what is the reason for this?

@pagmatt
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pagmatt commented Jun 23, 2023

Please use ThreeGppPropagationLossModel, MmWavePropagationLossModel is deprecated. And no, the SINR should vary as you vary the distance between UE and gNB

@dpugliese6
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The SNR not changing with distance is a behaviour already encountered in the uplink communications of the ns-3 LTE module. In that case, it was due to the UE power control that adjusted the TxPower as the distance changed so as not to waste energy if not needed. This in turn caused a constant SNR when the distance change in proximity of the BS.
I hope it can be useful to you.

@pagmatt
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pagmatt commented Aug 14, 2023

Conversely from the LTE ns-3 implementation, we have no power control in the mmwave module. Therefore, either the simulation setup does not reflect the scenario you are planning to implement, or this is indeed unexpected behavior.

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