If I have a traffic display I could see the traffics in proximity of my aircraft and meanwhile I could listen to their voice communication. So how could I match the traffic shown in the display with the corresponding voice communication? My understanding is that if I have a ADS B in system and the other aircrafts have mode-s transponder, I could know their call sign thru the ADS-B data, is that right? But how about I just have a TCAS or I have the ADS-B in transponder but other aircrafts do not have a Mode-S transponder?
Several approaches, currently impractical for GA:
Your radio receiver would need to be directional, to estimate the sender's bearing and maybe distance, and from that derive the sender's identity.
Voice broadcasts would need to be augmented with a digital squawk indicating the sender's call sign, like some automated speech broadcast weather reports do.
Onboard automatic speech recognition trained particularly for call signs could try to infer the sender's.
But we're a long way from duplicating how videoconfering software highlights whoever's speaking.