3D Modle (Tx antenna)

Viewing 4 posts - 1 through 4 (of 4 total)
  • Author
    Posts
  • #6071
    Naser
    Participant

    Dear Martin,

    In System level 1.9
    What is the difference between the following Tx antenna parameters:

    LTE_config.nr_of_antenna_elements_in_each_column
    and
    LTE_config.nTX

    Should they have the same number of antenna elements ?

    Best Regards,
    Naser

    #6076

    Dear Naser,

    nTx denotes the number of antenna ports. The antenna ports correspond to the “antennas” in the digital domain.
    One antenna port accumulates the signal from multiple antenna elements, where static, complex-valued weights are applied on the signal from each element, yielding the electrical downtilt.
    Example: If you talk about a 4×2 MIMO system, then your transmitter has 4 antenna ports. It could have, e.g., 40 antenna elements, with 10 elements per antenna column mapped to one antenna port.

    I hope, this answers your question.

    Best regards,
    Martin.

    #6083
    Naser
    Participant

    Dear Martin,

    Thank you very much, yes the picture is now clear.

    also:
    1- Does that means the vertical spacing is the spacing among these 10 elements ?

    2- what is the difference between:
    antenna_element_horizontal_spacing (in the TR36873 model)
    and
    TX_antenna_position_in_lambdas (in the TS36942 model)

    Are they similar ?

    Best Regards,
    Naser

    #6142

    Dear Naser,

    Yes, the vertical spacing is the sacing between antenna elements that are mapped to one port.

    -The parameter antenna_element_horizontal_spacing specifies the spacing between antenna elements (ports) which are assumed to be in horizontal dimension. Antenna arrays are assumed to be uniform.

    -The position of each antenna element is calculated in +channel_gain_wrappers\TR36873_Fading_3D_Channel.m

    Regards,
    Fjolla

Viewing 4 posts - 1 through 4 (of 4 total)
  • You must be logged in to reply to this topic.