Communication Systems Quiz

What is the function of an Analog-to-Digital Converter (ADC) in a digital data transmission system?

• Convert digital signal to analog for transmission

• Reverse operation of the encoder to retrieve the original information

• Convert analog signal to digital for transmission and convert it back upon reception

• Modulate the signal for long distance transmission

What is the primary consideration in the design of communication systems when corrupted by noise?

• Signal distortion through the channel

• Probability of error of the output signal

• Local reference available for demodulation

• Channel bandwidth

What is the block diagram representation of the transmitter system in a digital data transmission system?

• ADC End User Channel

• ADC Encoder Modulator

• Demodulator Detector Decoder

• Source ADC Encoder Modulator

What is the function of a Modulator in a digital data transmission system?

• Convert analog signal to digital for transmission and convert it back upon reception

• Reverse operation of the encoder to retrieve the original information

• Modulate the signal from source for long distance transmission

• Convert information to one format to another

What is the term used for a system where the local reference is out of phase with the transmitted carrier?

• Coherent system

• Asynchronous system

• Non-Coherent system

• Synchronous system

What is the formula for Bit Error Rate (BER) in a detected binary signal?

• QsentserrorPsentsPsentserrorP

• PsentserrorPsentsPsentserrorP

• PsentsPsentserrorP

• QsentserrorPsentserrorP

What is the maximum data rate that can be supported by a polar baseband signaling system with a bandwidth of 5000Hz and N0 = 10^-7 W/Hz?

• 20000 bps

• 10000 bps

• 40000 bps

• 5000 bps

What is the expected number of bit errors made in a binary signaling system with input digital waveforms s1(t) and s2(t) if the system has a noise power spectral density of N0 = 10^-11 W/Hz?

• 10

• 20

• 40

• 30

What is the BER for a bipolar signaling system with an amplitude of 0.15mV, a bandwidth of 2kHz, and a noise power spectral density of N0 = 10^-9 W/Hz?

• QsentserrorPsentsPsentserrorP

• QsentserrorPsentserrorP

• PsentsPsentserrorP

• PsentserrorPsentsPsentserrorP

What is the structure of the optimum receiver for a baseband data transmission system with a time duration of 0.25ms?

• Integrator, Sampler, LPF, Multiplier

• Sampler, LPF, Multiplier, Integrator

• LPF, Multiplier, Integrator, Sampler

• Multiplier, Integrator, Sampler, LPF