questions about AOA

Wireless Connectivity Ultra-Wideband
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  1. I’ve read DW1000 AOA Demonstration Primer, and the PDOA calculating formula is as follow:
    PDx = ((accangleA – sfdangleA) – (accangleB – sfdangleB)) + π;

why should we minus sfd angle? to compensate differenct length of antenna feeder?

  1. AOA (in radians)= arcsin(PD/π)/0.95
    is the value 0.95 here a good fit for mutural decoupling of antenna array? I suppose we can’t do this by deviding a linear value.

thanks!

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