Howtosignalprocessing
- What is Nonperiodic signal?
- How do you detect periodic signals in presence of noise?
- Can noise be periodic?
- What is noise cancellation in communication?
What is Nonperiodic signal?
Non-periodic signals include speech waveforms and random signals arising from unpredictable disturbances of all kinds. In some cases it is possible to write explicit mathematical expressions for non-periodic signals and in other cases it is not.
How do you detect periodic signals in presence of noise?
Hence, if the cross-correlation of the mixed signal y(t) with z(t) results a periodic signal, then the signal y(t) must contain a periodic component of the same frequency as that of the signal z(t). In this way, we can detect a periodic signal in the presence of noise using cross-correlation.
Can noise be periodic?
Periodic noise means noise possessing a repetitive on-and-off characteristic with a rapid rise to maximum and a short decay not exceeding 2 seconds.
What is noise cancellation in communication?
Basically, it detects and analyzes the sound pattern of incoming noise and then generates a mirror “anti-noise” signal to cancel it out. The end result is that you hear a drastically reduced level of noise.
