Digital Communication System MCQs

A comparison of frequency division and time division multiplexing systems shows that

The ramp signal m(t) = at is applied to a delta modulator with sampling period T, step size 8. Slope overload distortion would occur if

In a communication system, each message (1 or 0) is transmitted three times in order to reduce the probability of error. The detection is based on the majority rule at the receiver. If Pe is the probabiilty of bit error the probability of error for this communication system will be

Which one of the following is capable of giving the highest data speed?

An ideal 10 dB directional coupler is shown in the given figure 11.4. The power output at port-3 will be MatchFig. 11.4

A circular waveguide carries TEii mode whose radial electric-field is given by V Er = E0 J1(r) sin 4?m where 'Sr' is the radical distance in cm, from the waveguide axis. The cut-off wavelength of the mode is

The power spectral density of white noise

A correlation receiver consists of

A source has two symbols xi and x2 with probabiilties Pi and P2 respectively. If a new source, with four symbols is generated from the above source, then the new symbol probabilities will be (e is a number such that 0 < e < 1)