Most probably because this is the phase shift SSBSC generation method whete the m(t) is multiplied with carrier and again the m(t) and carrier is phase shifted to.90 deg (Hilbert transform) and multiplied again now if you subtract the both multiplied signal you'll get LSB and if Added you'll get USB.
Your Explanation was soo good air
Thank you
Can you please give the circuit diagram?
Sir why cant we give RF 0 as one of the input to SSB demodulator?why only RF 90?
Most probably because this is the phase shift SSBSC generation method whete the m(t) is multiplied with carrier and again the m(t) and carrier is phase shifted to.90 deg (Hilbert transform) and multiplied again now if you subtract the both multiplied signal you'll get LSB and if Added you'll get USB.
Sir why do we need rf input ,in demodulation block @14:13
As there is no separate local oscillator at the receiver, we are taking same carrier from transmitter.
Sir can why cant we give RF 0 as one of the input to ssbsc demodulator??why only RF 90