Flashcards
01 Handout
Cards in this deck (33)
- 1represents signals by a sequence of numbers like sampling or analog-to-digital conversions. They perform processing on these numbers with a digital processor.Digital Signal Processing
- 2is a function of independent variables, with time being perhaps the most prevalent single variable. The signal itself carries some kind of information available for observation.signal
- 3means that the processing is done with a digital computer or particular purpose digital hardware.digital
- 4DSPs reconstruct the analog signal from processed numbers through ___ and __reconstruction or digital-to-analog conversion.
- 5signals and systems classificationContinuous-Time and Discrete-Time Signals
Analog and Digital Signals
Deterministic and Random Signals
Periodic and Nonperiodic Signals
Power and Energy Signals - 6The continuous-time signal is the signals or quantities that can be defined and represented at specific time instants of the sequence.Continuous-Time
- 7A discrete-time signal is an indexed sequence of real, imaginary, or complex numbers, and it is a function of an integer-valued n that is denoted by x(n).Discrete-Time Signals
- 8If a continuous-time signal s(t) can take on any values in a continuous-time interval, then s(t) is called an ___analog signal
- 9If a discrete-time signal can take on only a finite number of distinct values, {s(n)}, then the signal is called a ____digital signal
- 10___ are those signals whose values are entirely specified for any given time.Deterministic signals
- 11___ are those signals that take random values at any given time.Random signals
- 12___ completes a pattern within a measurable time frame, called a period, and repeats that pattern over identical subsequent periods.Periodic signal
- 13___ does not repeat its pattern over a period.nonperiodic signal
- 14___ is a power signal if the average normalized power P is finite.complex signal 𝑠(𝑡)
- 15____ is an energy signal if the normalized energy E is finite.complicated signal 𝑠(𝑡)
- 16In communication systems, the received waveform is usually categorized into the desired part that contains the information signal and the undesired part, which is called ___noise.
- 17Shifting and Scaling Function TransformationsAmplitude Scaling
Time Shifting
Time Scaling
Time Reversal
Multiple Transformations - 18All corresponding amplitudes of the original signal must be multiplied by the scaling factor.Amplitude Scaling
- 19It means there is a movement done in the function concerning the x-axis.Time Shifting
- 20The function of the signal g(t) is multiplied/scaled by the given time (signal stretching).Time Scaling
- 21The negative variable inside the parenthesis denotes the time-reversal.Time Reversal
- 22Amplitude scaling, time scaling, and time-shifting can be applied simultaneously.Multiple Transformations
- 23___ are symmetric concerning the y-axis. Cosine signals are classified as even functions.Even functions
- 24These figures are ___ or ___. These signals are symmetric to the origin.sine waves or odd functions
- 25shows the multiplication of two even functions, a cosine wave, and a triangular wave, resulting in an even function.Product of Two Even Functions
- 26shows the multiplication of an even function and an odd function which results in an odd function.Product of Even and Odd Functions
- 27shows the multiplication of two odd functions, which results in an even function.Product of Two Odd Signals
- 28Any type of manipulation done in the signal is called ___. A typical reason for it is to eliminate or reduce an undesirable signal.signal processing
- 29common types of processing in signal samplingfiltering, noise cancellation, encryption, and echo suppression.
- 30___ takes samples at the fixed time interval where T represents the sampling interval or sampling period in seconds.Sampling
- 31Each sample maintains its voltage level during the sampling interval T to give the ADC enough time to convert it. This process is called ___and ___.sample and hold.
- 32The ____ guarantees that an analog signal can be, in theory, perfectly recovered as long as the sampling rate is at least twice the highest-frequency component of the analog signal to be sampled.ampling theorem
- 33To satisfy the sampling theorem condition, we apply___ to limit the input analog signal.an anti-aliasing filter
Information
- Description
- hard Digital Signal Processing Flashcards on 01 Handout , created by Eljin Aguilar on 30/01/2025.
- Created by
- Eljin Aguilar
- Views
- 2
- Rating