Understand the key fundamentals factors.
Define the #1 goal:
Prototypes, proof of concepts, technologies.
Eco-system - from user, human behavior, ease of use, SW, GUI, HW, applications.
From anechoic chamber to reverberation room.
Learned the ITU documentation on DF.
understand the difference between wireless communication market and DF needs - they are - opposite each to the other.
Challenged ourselves in testing experiments toughest environments.
Hands-on thousands of hours in real world, field testing, checking, fixing, changing and testing.
key challenge: To provide true, reliable relative direction in indoor/urban highly reflective environments.
If what you see on the display DOES NOT correlate with what and where you see it with your eyes in reality - the system failed, users will not use it .