Jun 8, 2005 #1 saad Advanced Member level 4 Joined Jun 8, 2005 Messages 101 Helped 10 Reputation 20 Reaction score 7 Trophy points 1,298 Location Pakistan Activity points 2,080 Why must carrier frequency be at least 10 times greater than the modulating frequency (its one of the basic criterion set by FCC) Reply as soon as possible. Saad
Why must carrier frequency be at least 10 times greater than the modulating frequency (its one of the basic criterion set by FCC) Reply as soon as possible. Saad
Jun 9, 2005 #2 eng_Semi Full Member level 6 Joined May 3, 2005 Messages 325 Helped 37 Reputation 74 Reaction score 6 Trophy points 1,298 Location Egypt Activity points 4,111 What I know is that the nyquist condition for sampling is fs >= 2*Fin_max, to prevent aliasing. but to be 10 times greater, I think that this may be used in oversamoling
What I know is that the nyquist condition for sampling is fs >= 2*Fin_max, to prevent aliasing. but to be 10 times greater, I think that this may be used in oversamoling
Jun 13, 2005 #3 D davicente Junior Member level 3 Joined Jul 31, 2002 Messages 31 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,286 Activity points 236 It all depends on what kind of modulating technique you are using The relation between carrier and modulating signal will fix the modulating index, which tell you in any case your bandwith I suppose 1o times the modulating signal is required in order no to colour the modulation spectrum i hope this will help you bye
It all depends on what kind of modulating technique you are using The relation between carrier and modulating signal will fix the modulating index, which tell you in any case your bandwith I suppose 1o times the modulating signal is required in order no to colour the modulation spectrum i hope this will help you bye
Jun 14, 2005 #4 A angelote Advanced Member level 4 Joined Apr 28, 2005 Messages 108 Helped 12 Reputation 24 Reaction score 1 Trophy points 1,298 Location Spain Activity points 2,099 The higher the relation is, the easier the filters are. If the relation between modulating frequency and carrier is lower, reveiver filters will have higher order. This is another practical reason.
The higher the relation is, the easier the filters are. If the relation between modulating frequency and carrier is lower, reveiver filters will have higher order. This is another practical reason.
Jun 15, 2005 #5 Y yibinhsieh Full Member level 4 Joined Apr 25, 2005 Messages 194 Helped 19 Reputation 38 Reaction score 5 Trophy points 1,298 Activity points 2,845 I think it will meet the nanoband communication requirement. If the modulation bandwidth is only tenth of the carrier frequency, it only occupies small bandwidth. Yibin.
I think it will meet the nanoband communication requirement. If the modulation bandwidth is only tenth of the carrier frequency, it only occupies small bandwidth. Yibin.