Chapter 8 · MCQ Read Mode

Communication Systems

In a bandpass (passband) communication system, the signal is:

Thermal noise in a communication system is caused by:

An AWGN channel model assumes the noise is:

Bit Error Rate (BER) is defined as:

Signal-to-Noise Ratio (SNR) in dB is calculated as:

Compared to analog systems, digital communication systems are generally:

Flicker (1/f) noise is most significant at:

Equivalent noise bandwidth refers to:

A baseband communication system transmits the signal:

Figure of Merit of a demodulator is defined as the ratio of:

DSB-SC modulation differs from standard AM in that DSB-SC:

SSB-SC modulation is primarily used to save:

Vestigial sideband (VSB) modulation is a compromise between:

Synchronous (coherent) demodulation is required for:

A Costas loop is used at the receiver to:

In Frequency Modulation (FM), the message signal varies the carrier's:

Carson's rule estimates the bandwidth of an FM signal as:

Narrowband FM is characterized by a modulation index β that is:

Pre-emphasis in an FM transmitter is used to:

The spectrum of an angle-modulated (FM/PM) signal contains sideband amplitudes described by:

In BPSK, a binary bit is represented by:

Among BASK, BFSK and BPSK, the best noise performance (lowest error probability) is given by:

QPSK modulation carries how many bits per symbol?

Quadrature Amplitude Modulation (QAM) achieves high bandwidth efficiency by varying:

A matched filter is designed to:

The impulse response of a matched filter is:

The Shannon–Hartley theorem gives channel capacity as:

Increasing M in an M-ary modulation scheme generally:

Source coding is applied primarily to:

Time Division Multiplexing (TDM) allows multiple signals to share a channel by dividing it in:

In Pulse Amplitude Modulation, narrower pulses require:

The correct order of stages in PCM encoding is:

For a uniform quantizer, the maximum quantization error is:

Companding is used primarily to:

Differential PCM (DPCM) reduces the required bit rate by encoding:

Delta Modulation (DM) uses a quantizer with:

Slope overload distortion in DM occurs when:

Granular noise in Delta Modulation occurs when the input signal is:

Adaptive Delta Modulation (ADM) improves on standard DM by:

Sigma-delta modulation achieves high resolution primarily through:

The Hamming distance between two codewords is:

A single parity bit can:

In a systematic linear block code, the codeword:

A defining property of a cyclic code is that:

Syndrome decoding of a linear block code is performed using the:

A convolutional encoder's output at any time depends on:

A trellis diagram in convolutional coding represents:

The standard maximum-likelihood decoding algorithm for convolutional codes is:

Channel coding is applied primarily to:

Serial communication, compared to parallel, is generally preferred for long distances because it:

Frequency Division Multiplexing (FDM) separates signals by assigning each a distinct:

Time Division Multiplexing (TDM) is most associated with:

Wavelength Division Multiplexing (WDM) is primarily used in:

In the OSI model, routing of packets between networks is handled by the:

The OSI Transport layer is primarily responsible for:

The Data Link layer of the OSI model is responsible for:

The TCP/IP model condenses network functions into how many layers?

A network topology in which every node connects to a central hub is called a:

Layered network architecture is beneficial mainly because it: