50 Matched Filter Multiple Choice Questions with Answers

This article lists 50 Matched Filter MCQs for Engineering Students. The Matched Filter Questions & Answers below include solutions and links to the relevant topic. This is helpful for users who are preparing for their exams and interviews, or professionals who would like to brush up on the fundamentals of the Matched Filter.

In Digital communication, information is transferred in the form of bits and these bits are classified into bit 1 and bit 0. The signal received consists of transmitted information along with noise. If the noise effect is more it leads to errors in transmitted information referred to as Bit errors.

The reliability of the information is affected due to the bit errors. To overcome such errors, a filter is used to reduce noise power by improving signal power which is referred to as a Matched filter. It is an Optimum detector of White Noise.

These filters are generally placed in radar, here the known signal gets transmitted and the signal received compares the reflected one with the signal transmitted. Even signal detection uses Matched filters.

Other than white noises, matched filters cannot maximize the value of SNR. For this reason, Optimum signal detectors are used. These Matched filters are categorized into Two-dimensional and Three-dimensional Filters.

1). Linear Filter that maximizes the SNR is ___ filter?

Matched Filter

Low Pass Filter

High Pass Filter

Band Pass Filter

2). What is maximized by placing Matched Filters?

Voltage

Current

Temperature

Signal-Noise Ratio

3). Matched filter’s frequencies response is in proportion to ________ of the incoming signal spectrum?

Complex Conjugate

Conjugate

Simple Conjugate

b & c

4). If H(f) = Ga S*(f) e-j2πft1 is the frequency response of Matched Filter what is Ga stand for?

Noise

Frequency

Gain

Gaussian Noise

5). What makes the phase angle and magnitude of matched filter vary if the gain is 1 in Matched Filters?

Noise

Frequency

Gain

Gaussian Noise

6). How is the Impulse response of Matched filter obtained in the Time domain?

Applying Inverse Fourier Transform to H(f)

Applying Fourier Transform to H(f)

Applying Inverse Fourier Transform to h(t)

Applying Fourier Transform to h(t)

7). ________ is the replica of the signal received in Matched Filters?

Frequency Response

Impulse Response

Phase Response

Time Response

8). Why a filter is referred to as Matched Filter?

Maximize Voltage

Maximize Current

Maximize Noise

Maximize Signal-Noise Ratio

9). Matched filters are utilized for _____?

To Achieve Desired Gain

To Maximize Current

To Detect Signal Emerged in Noise

a & c

10). What are the characteristics of Matched Filter?

Maximize SNR

Outcome is Noise Free

Transmitted Signals Detected

All Mentioned Above

11). What type of technique is Matched Filtering?

Modulation

Demodulation

Amplification

Attenuation

12). Matched Filter construction depends upon ___________?

Noise Spectrum

Frequency

Gain

Noise

13). __________ are optimal filters?

Matched Filter

Correlation Filter

Band Pass Filter

a & b

14). Which of the following filter is considered for single Wave forms?

Matched Filter

Low Pass Filter

High Pass Filter

Band Pass Filter

15). What is the Impulse response for x(t) as input?

x(-t)

x(T)

x(T-t)

x(T+t)

16). What is the rule of Matched Filter outputs?

Output Duration must be Twice Input Signal Duration

Character of Receiver Noise

Peak Value is Input Signal’s Energy

a & c

17). Impulse Response of Matched filters depends upon _______?

Shape of Input Signal

Character of Receiver Noise

a & b

Maximized Voltage

18). X-Rays prefer _______ filters?

Two Dimensional Matched Filter

Correlation Filter

Three Dimensional Matched Filter

a & b

19). Synthetic Aperture Radar makes use of _______?

Two Dimensional Matched Filter

Correlation Filter

Three Dimensional Matched Filter

a & b

20). The processor's three-dimensional Matched filters must match with ________?

Object Signature

Velocity Vector

Processor

a & b

Matched Filter MCQs for Students

21). Three dimensional matched filters utilized in ________?

Detecting Moving Targets

Detecting Weak Targets

Detecting Optical Targets

All Mentioned Above

22). What happens if the filter matches with the input?

Responses Differ

Responses are Same

Responses Change Accordingly

SNR Degrades

23). What happens to SNR if the filter gets matched with the applied signal?

SNR Decreases

SNR Increases

SNR Minimizes

SNR Maximizes

24). Calculate the output SNR for the energy of the signal (Binary digital) 10-6Watt-second & the No (One-sided Power Spectral Density) is 10-7 Watts/Hz.

10 dB

20 dB

30 dB

13 dB

25). What is the amplitude spectrum of the signal obtained for the applied signal e-|t|?

1/ω

2/1+ω2

2/(1+ω2)2

4/(1+ω2)2

26). What is the formula to calculate SNR in Matched filters?

Es/ No

2Es/ No

Es/ 2No

Es/ 3No

27). The probability of Error in matched filters depends on___?

Time Delay

Frequency Delay

Phase Delay

Signal Energy

28). What is required for matched filter specifications?

Time Delay

Frequency Delay

Phase Delay

Signal Energy

29). What is the Frequency response of matched filters?

Conjugate of Spectrum Received

Spectrum Received

Data Transmitted

Data Received

30). The characteristics of matched filter should match with _____?

Data Transmitted

Data Received

Noise Spectral Density

Frequency Response

Matched Filter MCQs for Exams

31). What measures the correlation between an incoming message received & its Impulse response?

High Pass Filter

Low Pass Filter

Matched Filter

Band Pass Filter

32). What is reduced by placing Matched filters?

Frequency Response

Impulse Response

Intersymbol Interference

Output Power

33). If y(t) is e-π(t^2) & a Filter h(t) matched with y(t). For y(t) as an input applied to the h(t). Then Fourier Transform of output is equivalent to ______?

e-π(f^2)

e-2π(f^2)

e-(f^2)

e-π(f^2)/2

34). Gravitational Wave Astronomy makes use of ______?

High Pass Filter

Low Pass Filter

Matched Filter

Band Pass Filter

35). Matched filters error probability is _______?

erfc√(E/2η)

erfc√(E/η)

erfc√(E/2)

√(1/2η)

36). On what factors does the mathematical formulation of a matched filter depends?

Shape of Input Signal

Character of Receiver Noise

a & b

Maximized Voltage

37). What should be the integral value in matched filters?

Limited

Infinite

38). What is the computational cost of matched filters?

Low

High

Negotiable

Can’t Say

39). Matched filters are _________ towards the rotation of objects?

Transparent

Limited

Sensitive

Doesn’t Get Affected

40). Matched filters have ________ complexity?

Low

High

Negotiable

Less

Matched Filter MCQs for Quiz

41). Which filter detects a signal in linear conditions of the channel?

High Pass Filter

Low Pass Filter

Matched Filter

Band Pass Filter

42). Why it is advantageous to use Matched filters in detection?

Desired Gain is Achieved

To Maximize Current

Transmitted Signal Pulses Detected

a & c

43). Coherent Detection uses ______?

Matched Filter

Low Pass Filter

High Pass Filter

Band Pass Filter

44). Digital communications make use of _____?

Matched Filter

Low Pass Filter

High Pass Filter

Band Pass Filter

45). Why matched filters are placed in digital communications?

To Maximize Voltage

To Maximize Current

To Detect Pulses Transmitted

a & c

46). What type of filters are preferred in Parameter Estimation?

Matched Filter

Low Pass Filter

High Pass Filter

Band Pass Filter

47). Where we can use matched filters?

Audio Amplification

Image Sharpening

Signal Detection

Image Smoothening

48). ____ filter is utilized in Image processing?

Two-dimensional Matched Filter

Low Pass Filter

High Pass Filter

Three-dimensional Matched Filter

49). What is the example of matched filtering?

Audio Amplification

Image Sharpening

Pulse Compression

Image Smoothening

50). Matched filters are utilized in ______?

Audio Amplifiers

Equalizers

Radar Imaging

Image Sharpening

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