3.1 Flashcards
A discrete time system processes a given
input sequence ___
to generate an
output sequence ____
x[n], y[n]
2 classes of discrete time system
linear, time-invariant
sequences that gives same output to
linear system (sst,tss)
scale, sum, transform
transform, scale, sum
sequences the gives same output to
be considered a time-invariant system (input/output)
shift input, transform to output
transform to output, shift output
DSP block diagram, which block is the discrete time system
input filter/ ADC / processor / DAC/ output filter
processor
what properties does a LTI system satisfy
Satisfy linear and time-invariant property
basic building blocks of discrete linear system
scale, add, unit delay
filter examples of discrete time system
moving average filter
accumulator
median filter
M-point moving average system facts (filter, amplitude, use)
Low pass filter, reduces amplitude of high frequencies signals
used in smoothing random variations
time advance formula
y[n] = x[n+3]
down sampling formula
yu[n] = x[3n]
amplification formula
y[n] = 3 x[n]
time delay formula
y[n] = x[n-3]
