Q4) a) A binary data stream needs to be transmitted at 4 Mbit/s by means of binary signaling. To reduce ISI, a raised cosine roll-off pulse of roll-off factor r = 1/3 will be used. Determine the minimum required bandwidth for this transmission. b) For the binary sequence 010000101010000011, sketch its HDB3 code.

1) Write VHDL code of the following circuitY=(a xor b) or (not (c and b) ).

b) An 10 bits single channel PCM system gives an output of 102 kilo bit per second(kbps). Calculate: i. The sampling frequency of the system. ii. The highest possible modulating frequency of the system. iii. The bit duration of the system. iv. The Bandwidth of the system.

communication sys

Plz solve it

If the sequence 111111 is transmitted using Differential Manchester encoding. what is the ratio of the baud rate (D) to the bit rate (R)?

3. A communication system uses (7, 4) Hamming code for encoding and decoding. a) Write the encoded bit stream for the data 1100. b) If the received bit stream is 1011000, what will be the transmitted data? Assume the MSB is Bit 1 and LSB is Bit 7 in Hamming code (not related to part (a)).

7. QPSK modulation, pulse forming raised cosine roll off coefficient a = 0.2, bit rate 200 kbit / s, then signal bandwidth is, A.100kHz B.120kHz C.200kHz D.240kHz

a) Convert the PCM binary sequence 1101000101 to NRZ(M) encoding and sketch the ASK and PSK waveform produced by the resulting code on the carrier shown.b) what would be the transmitted sequence if 'even' parity is used?

Given that the probability of bit error on a given channel is p and that n-bit words are transmitted. a.) Calculate the probability of a correction error in the Hamming 7,4 code. b.) Calculate the probability of a detection error in the Hamming 7,4 code.