why AWR1243 owns three Tx and four RX?
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Hi,
The AWR1243 has 3 TX and 4 RX antennas. Having multiple antennas like this allows you to do angle estimation for example. Having a TX antenna placed slightly apart vertically also allows you to do elevation estimation.
Please refer to our training series on this:
training.ti.com/mmwave-training-series
Specifically module 1.5 covers angle estimation.
Let me know if this answers your question.
Best Regards,
Anand