Signal

Adding u(t) and r(t) to create a signal

Adding u(t) and r(t) to create a signal
  1. What is signal addition?
  2. How do you represent the signal?
  3. How do you scale a signal?

What is signal addition?

Signal addition—two signals x(t) and y(t) are added to obtain their sum z(t). An adder is used. ▪ Constant multiplication—a signal x(t) is multiplied by a constant α. A constant multiplier is used.

How do you represent the signal?

Signals can also be represented by a magnitude and phase as a function of frequency. Signals that repeat periodically in time are represented by a power spectrum as illustrated in Figure 2.

How do you scale a signal?

A signal x(t) is scaled in time by multiplying the time variable by a positive constant b, to produce x(bt). A positive factor of b either expands (0 < b < 1) or compresses (b > 1) the signal in time.

Solution Is my solution correct?
Is my solution correct?
How do you check if your solution is correct?What is correct solution to or solution of?Is solution same as answer?Do we say solutions for? How do y...
Frequency Choice of relationship between n_fft and window_length in STFT
Choice of relationship between n_fft and window_length in STFT
How do you choose a sampling frequency in FFT?What is N_fft in Librosa?What is FFT windowing? How do you choose a sampling frequency in FFT?The freq...
Negative Is the negative spectrum (by DFT) of a real signal needed to reconstruct it?
Is the negative spectrum (by DFT) of a real signal needed to reconstruct it?
What does DFT do to a signal?What do negative values in FFT mean?Why are there negative frequencies in FFT?What happens if we apply DFT twice to a si...