Dude these specs only work when RWR is combined with inbuilt EW suite(SPECTRA).
1. Digital RWR: Ever imagined how a RWR differenciates between a source enemy FCR and it's own EW's similar generated frequency?? There are multiple techniques ranging from Modulations to superimposing digital data onto an analog signal(encoding digital data on generated analog signal). Both the signals are received by RWR but how to differentiate? Answer: digital signal processors using active filters. The EW suite's signal contains coded digital signals(eg: 0100110110101 with let's say repitition of code after 10 digits) which is read by RWR and thus supercomputer is able to "filter out" these signals and only those signals remain that originate from enemy's FCR. This gives correct positioning of enemy, missiles, SAMs, etc.
2. 3 antennas with 120⁰ azimuth is specifically for monitoring your blind spots. If you imagine a plane in top view and then imagine the antennas on wing tips, fin tip and intakes, you will see that each antenna is able to pick up enemy's signature signal below the wings and above the wings to 120⁰, from right to left and top to bottom on tail fin and complete below the surface with intake antenna so all in all, Rafale's sense of threat detection is almost a 360⁰ barring few angles.
3. Here is where I get confused. Interferometry is basically used for optics where a ligjt source is picked up, splitted and then read by a computer to get various superimposed signals(data) in form of fringe patterns. Whether Rafale has optical sensors for this is beyond me. But this is also true for other EM waves. Now let's assume Rafale has an EM interferometer, any EM wave guided enemy(EO, TV wave guided, etc that don't use their frontal Radar) is captured, splitted, analysed for data based on the patterns generated and then checked for threat perception. If threat is perceived, AI enables evasive manuvers or warns the user about being "painted electronically by an enemy".
4. This point is really how AI perceives threat and then enables weapons section automatically based on various captured data analysis, enemy signatures matched, IFF findings, etc and then co-ordinating enemy's position via AESA radar, EO, home in jamming, etc.