Rank Indicator (RI) in System Level Simulation

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  • #7949
    Kai Cheng Wang
    Participant

    Dear all
    Can anyone tell me how to simulate RI in uetrace.m of System Level Simulation, thank you.

    Best regards
    Kai Cheng

    #7964
    Kai Cheng Wang
    Participant

    Hello
    Can anyone ask my question? thank you.

    Best regards
    Kai Cheng

    #7994

    Hi Kai Cheng,

    the rank indicator is stored in the_UE_traces.RI. Make sure to set LTE_config.compact_results_file <= 2 in order to save it in the results file.

    Best regards,
    Martin

    #8009
    Kai Cheng Wang
    Participant

    Dear Martin
    Thank you for your reply. I want to ask another question. How does system-level simulator choose RI for each UE? In other words, If I use 4*2 MIMO, how does it decide RI that is 1 or 2 for each UE? thank you.

    Best regards
    Kai Cheng

    #8112
    Kai Cheng Wang
    Participant

    Hello
    Does anyone reply my question? thank you.

    Best regards
    Kai Cheng

    #8157

    Dear Kai Cheng,

    The Rank Indicator decision is based on the number of transmitted data bits for a rank value, where it is chosen the RI for which the number of bits is maximized.

    If you are interested on the actual calulation method, I suggest you have a look at the code where this is calculated: +feedback_calculation\CQI_and_rank.m, lines 130-143.

    Best regards,
    Fjolla

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