SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
Search
Test your basic knowledge |
DSP: Digital Signal Processing
Start Test
Study First
Subject
:
it-skills
Instructions:
Answer 46 questions in 15 minutes.
If you are not ready to take this test, you can
study here
.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.
This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Controls how much the carrier frequency varies around its unmodulated value.
Modulation index
Telecommunication
Rotating phasor
Image processing
2. Process of multiplying a (relatively) low frequency message signal by a high frequency sinusoid
General amplitude modulation
Continuous
Fourier theory
Time domain representation
3. Graphical representation of the frequency content of a signal - allows us to quickly and easily see the relationship between different frequency components and their amplitudes
Discrete Time Signal
Spectrum
Signal
Beat Note
4. Varying quantity that is a function of time; time is continuous - then the value of the signal can be found at any point in time; - not discrete
Resolution equation
Telecommunication
Continuous
Beat Note
5. Represented mathematically by an indexed sequence of numbers
Discrete Time Signal
Odd Functions
Time domain representation
Time Invariant Systems
6. Industry Apps / Major Areas: Telecommunications - Audio Processing - ___________ - Image processing
Long range passive towed sonar
Modulation index
Echo Location
Frequency Modulation (FM signal processing)
7. Processing involves improving quality a signal- e.g. image enhancement - data compressions - noise reduction - ________ - filtering - etc.
Digital
Aliasing
Half-Wave symmetry
Echo reduction
8. Involves music - speech generation - speech recognition
Harmonic
Even Functions
Audio Processing
Infinite Impulse Response (IIR) Filters
9. Equivalent to the principle of superposition - if the input is the sum of two or more scaled sequences - we can find the output of each sequence acting alone - then add (superimpose) the separate scaled output
Time domain representation
Image processing
Linear Systems
Long range passive towed sonar
10. A projection onto real axis
Radar
Spectrum
Rotating phasor
Finite Impulse Response (FIR) Filters
11. Processing of signals by digital means
General amplitude modulation
Resolution equation
DSP
Medical imaging
12. Description of how one parameter is related to another - ex. voltage which varies with time is common in analog electronics
Signal
Fourier theory
Odd Functions
Negative frequency
13. Waveform is symmetrical about the vertical axis or f(x) = f(-x); - Cosine is this function - only have cosine terms and may have a constant.
Even Functions
Rotating phasor
Time domain representation
Signal
14. Uses multiplexing - compressions - and echo control
Quantization error equation
Naval DSP applications
Digital
Telecommunication
15. For any sinusoidal signal with fundamental frequency f 0 - there exists an infinite number of ________frequencies or frequencies which are integer multiples of f 0 .
Quantization error equation
Rotating phasor
Harmonic
DSP
16. Uses a process called the Discrete Fourier Transform or DFT - used to determine the frequency content of a continuous signal
Sinusoidal Signals
Fourier Decomposition
Rotating phasor
Digital filters purposes
17. DSP Applications: - radar and sonar - oil exploration - space exploration - _______
Linearity
Medical imaging
Continuous
Echo reduction
18. Uses a relatively low frequency message signal to modulate or vary the frequency of a relatively high frequency carrier signal
Frequency Modulation (FM signal processing)
Time Invariant Systems
Medical imaging
Fourier Decomposition
19. Occur frequently in nature - sound waves - electromagnetic radiation - any type of periodic waveform can be constructed from this signal
Sinusoidal Signals
Harmonic
Odd Functions
Negative frequency
20. Two separate units - one for tracking targets - one for illumination of targets for weapons guidance (SAMs etc)
Fourier theory
Radar
Negative frequency
Discrete Time Signal
21. Refers to what we are familiar with as the signal itself - with amplitude values plotted against time values
Aliasing
DSP
Time domain representation
Long range passive towed sonar
22. The negative half cycle of the function waveform is the same shape as the positive half - except inverted - Both sine and cosine functions have this - Functions with this have only odd harmonics.
Digital filters purposes
Radar
Half-Wave symmetry
Quantization
23. A special case of amplitude modulation - When two sinusoids of different frequencies are multiplied
Spectrum
Beat Note
Odd Functions
Impulse Decomposition
24. Filter output sample depends on previous input samples and previous filter output samples - these filters always have a feedback component - recursive filters
General amplitude modulation
Rotating phasor
Audio Processing
Infinite Impulse Response (IIR) Filters
25. If an input is delayed (shifted) by n0 - then the output is delayed by the same amount
Fourier theory
Signal
Time Invariant Systems
Beat Note
26. Uses a signal that has been quantized into discrete values rather than a continuous signal
Image processing
Sampling
Digital
Half-Wave symmetry
27. A phasor rotating in negative (clockwise) direction
Odd Functions
Audio Processing
Echo reduction
Negative frequency
28. Used in medical fields - space - commercial imaging products
Sinusoidal Signals
Half-Wave symmetry
Image processing
Normalized impulse
29. Two properties lead to simplifications of mathematical analysis: - __________ - time-invariance
Sampled Data Signal
Linear Systems
Linearity
Medical imaging
30. Type of decomposition relies on the use of a function known as the delta function or unit _____function
Impulse Decomposition
Medical imaging
Frequency Modulation (FM signal processing)
Aliasing
31. Obtained by recording the values of x(t) at equally spaced time instants - the result is a sequence of numbers whose individual values are samples of the analog signal
Finite Impulse Response (FIR) Filters
Continuous
Sampled Data Signal
General amplitude modulation
32. States any periodic waveform can be approximated by a sum of harmonically related sinusoids
Finite Impulse Response (FIR) Filters
Negative frequency
Fourier theory
Signal
33. Signal comprised of a continuous set of values; -not digital or discrete
Beat Note
Echo reduction
Long range passive towed sonar
Analog Signals
34. Used for two general purposes: (1) separation of signals that have been combined - and (2) restoration of signals that have been distorted in some way.
Analog Signals
Rotating phasor
Digital filters purposes
Fourier theory
35. Echo Location uses: radar - sonar - _______
Radar
Odd Functions
Image processing
Reflection seismology
36. Means that sample number zero has a value of one - while all other samples have a value of zero -delta function is frequently called the unit impulse.
Radar
Rotating phasor
Reflection seismology
Normalized impulse
37. Radar - Sonar - Data Communication
Half-Wave symmetry
Long range passive towed sonar
Time domain representation
Naval DSP applications
38. The conversion of analog or continuous signals to digital or discrete signals - referred to as analog-to-digital conversion - value of signal is sampled at discrete time intervals; time intervals are usually uniform
Half-Wave symmetry
Quantization
Discrete Time Signal
Image processing
39. Used for detection and tracking of underwater acoustic signals - consists of a dry end and a wet end - dry end;
Long range passive towed sonar
Half-Wave symmetry
Impulse Decomposition
Frequency Modulation (FM signal processing)
40. Imax-Imin /4*( 2^n - 1)
Quantization error equation
Linear Systems
Digital
Continuous
41. Measurement at regular intervals of the amplitude of a varying waveform (in order to convert it to digital form)
Digital
Resolution equation
Sampling
Fourier Decomposition
42. Waveform is symmetrical about the origin or f(x) = -f(-x); - Sine is this function - only sine terms and no constant term.
Medical imaging
Odd Functions
Echo Location
Frequency Modulation (FM signal processing)
43. A phenomenon of sinusoids changing frequency during sampling; sinusoid assumes a frequency other than its own
Impulse Decomposition
Audio Processing
Quantization error equation
Aliasing
44. Imax-Imin / 2^n - 1
Time Invariant Systems
Convolution
Resolution equation
Discrete Time Signal
45. A formal mathematical operation - takes two signals and produces a third signal
Convolution
Discrete Time Signal
Fourier theory
Image processing
46. Use only the current and past input samples to calculate the current output sample; -no feedback -non recursive filters
Half-Wave symmetry
Finite Impulse Response (FIR) Filters
Time domain representation
Negative frequency