Question

Q14: For the binary sequence in Q13, sketch the resulting waveforms from

sinusoidal modulation if the modulation type: ASK, BPSK, FSK, QAM, QPSK,

QFSK.

Q15: A modulating signal ?(?) bandlimited to 4 kHz is sampled at a rate of 10.000

samples/sec. The samples are quantized into 256 levels, binary coded (unipolar

NRZ) and transmitted over a channel with ?? (?) = 6.25*10-5 watt/Hz. Each

received pulse has energy 2O 10-5 Given that ?? = 1 and ?

2(?)

̅̅̅̅̅̅̅.

a-Find transmission bandwidth.

b- Find signal – to – quantizing noise ratio.

c- Find Signal– to – noise ratio of received signal.

d- Calculate error probability.

e- repeat c & d the signaling format being (bipolar NRZ).

Answer 1