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MMWCAS-RF-EVM: Angular resolution at maximum range

David Smith12
Prodigy 70 points
Part Number: MMWCAS-RF-EVM

Hi support team,

I am looking at the quoted angular resolution of 1.4deg for the MMWCAS-RF-EVM and wondering, at what range is that accuracy obtained? Is it only in the SRR MIMO mode (if so, what is the maximum MIMO range), or can the system retain this resolution out to ranges in excess of 350m?

Many thanks. 

  • 0
    TI__Guru*** 147894 points

    Please give me some time to get back to you on this

    thank you

    Cesar

  • 0 in reply to Cesar
    TI__Guru*** 147894 points

    Hi,

    Sorry for the delay.

    The quoted angular resolution is based on the EVM antenna array  where we have 86 channels in the virtual array along the azimuth. This would give an angular resolution of (2/86) radians and converting to degrees ~ 1.4 degree.

    This angular resolution of 1.4 degree is at boresight and will degrade as we go towards the edge of the field-of-view by a (2/(86*cos(theta))) for example at theta = 60 the angular resolution would be ~ 2.7 degrees.

    That being said as the range of the target increases, the SNR will decrease. Theoretically, the SNR will effect the angle accuracy (but not necessarily the aperture-limited angular resolution) so at some large distance it is possible that the SNR is so weak that the angle accuracy is worse than the angle resolution and you might not achieve 1.4 degree.

     

    If the question is asking about the angular resolutions in TX beamforming and MIMO then in TX beamforming we can achieve exactly the same resolution by stitching multiple beams together.

    Thank you

    Cesar