Matched Filter Question & Answers August 13, 2022 By WatElectronics 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 None Hint 2). What is maximized by placing Matched Filters? Voltage Current Temperature Signal-Noise Ratio None Hint 3). Matched filter’s frequencies response is in proportion to ________ of the incoming signal spectrum? Complex Conjugate Conjugate Simple Conjugate b & c None Hint 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 None Hint 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 None Hint 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) None Hint 7). ________ is the replica of the signal received in Matched Filters? Frequency Response Impulse Response Phase Response Time Response None Hint 8). Why a filter is referred to as Matched Filter? Maximize Voltage Maximize Current Maximize Noise Maximize Signal-Noise Ratio None Hint 9). Matched filters are utilized for _____? To Achieve Desired Gain To Maximize Current To Detect Signal Emerged in Noise a & c None Hint 10). What are the characteristics of Matched Filter? Maximize SNR Outcome is Noise Free Transmitted Signals Detected All Mentioned Above None Hint 11). What type of technique is Matched Filtering? Modulation Demodulation Amplification Attenuation None Hint 12). Matched Filter construction depends upon ___________? Noise Spectrum Frequency Gain Noise None Hint 13). __________ are optimal filters? Matched Filter Correlation Filter Band Pass Filter a & b None Hint 14). Which of the following filter is considered for single Wave forms? Matched Filter Low Pass Filter High Pass Filter Band Pass Filter None Hint 15). What is the Impulse response for x(t) as input? x(-t) x(T) x(T-t) x(T+t) None Hint 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 None Hint 17). Impulse Response of Matched filters depends upon _______? Shape of Input Signal Character of Receiver Noise a & b Maximized Voltage None Hint 18). X-Rays prefer _______ filters? Two Dimensional Matched Filter Correlation Filter Three Dimensional Matched Filter a & b None Hint 19). Synthetic Aperture Radar makes use of _______? Two Dimensional Matched Filter Correlation Filter Three Dimensional Matched Filter a & b None Hint 20). The processor's three-dimensional Matched filters must match with ________? Object Signature Velocity Vector Processor a & b None Hint Matched Filter MCQs for Students 21). Three dimensional matched filters utilized in ________? Detecting Moving Targets Detecting Weak Targets Detecting Optical Targets All Mentioned Above None Hint 22). What happens if the filter matches with the input? Responses Differ Responses are Same Responses Change Accordingly SNR Degrades None Hint 23). What happens to SNR if the filter gets matched with the applied signal? SNR Decreases SNR Increases SNR Minimizes SNR Maximizes None Hint 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 None Hint 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 None Hint 26). What is the formula to calculate SNR in Matched filters? Es/ No 2Es/ No Es/ 2No Es/ 3No None Hint 27). The probability of Error in matched filters depends on___? Time Delay Frequency Delay Phase Delay Signal Energy None Hint 28). What is required for matched filter specifications? Time Delay Frequency Delay Phase Delay Signal Energy None Hint 29). What is the Frequency response of matched filters? Conjugate of Spectrum Received Spectrum Received Data Transmitted Data Received None Hint 30). The characteristics of matched filter should match with _____? Data Transmitted Data Received Noise Spectral Density Frequency Response None Hint 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 None Hint 32). What is reduced by placing Matched filters? Frequency Response Impulse Response Intersymbol Interference Output Power None Hint 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 None Hint 34). Gravitational Wave Astronomy makes use of ______? High Pass Filter Low Pass Filter Matched Filter Band Pass Filter None Hint 35). Matched filters error probability is _______? erfc√(E/2η) erfc√(E/η) erfc√(E/2) √(1/2η) None Hint 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 None Hint 37). What should be the integral value in matched filters? 1 0 Limited Infinite None Hint 38). What is the computational cost of matched filters? Low High Negotiable Can’t Say None Hint 39). Matched filters are _________ towards the rotation of objects? Transparent Limited Sensitive Doesn’t Get Affected None Hint 40). Matched filters have ________ complexity? Low High Negotiable Less None Hint 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 None Hint 42). Why it is advantageous to use Matched filters in detection? Desired Gain is Achieved To Maximize Current Transmitted Signal Pulses Detected a & c None Hint 43). Coherent Detection uses ______? Matched Filter Low Pass Filter High Pass Filter Band Pass Filter None Hint 44). Digital communications make use of _____? Matched Filter Low Pass Filter High Pass Filter Band Pass Filter None Hint 45). Why matched filters are placed in digital communications? To Maximize Voltage To Maximize Current To Detect Pulses Transmitted a & c None Hint 46). What type of filters are preferred in Parameter Estimation? Matched Filter Low Pass Filter High Pass Filter Band Pass Filter None Hint 47). Where we can use matched filters? Audio Amplification Image Sharpening Signal Detection Image Smoothening None Hint 48). ____ filter is utilized in Image processing? Two-dimensional Matched Filter Low Pass Filter High Pass Filter Three-dimensional Matched Filter None Hint 49). What is the example of matched filtering? Audio Amplification Image Sharpening Pulse Compression Image Smoothening None Hint 50). Matched filters are utilized in ______? Audio Amplifiers Equalizers Radar Imaging Image Sharpening None Hint For More MCQs Notch Filter/Band Reject Filter Question & Answers Band Pass Filter Question & Answers High Pass Filter Question & Answers FIR Filter Question & Answers Low Pass Filter Question & Answers Please fill in the comment box below. Time's up