Our professor wants a short report for the followin question. My class is Signals and Systems....

Our professor wants a short report for the followin question. My class is Signals and Systems. The book we are using is Signals and systems second edition by Simon Hykin and Barry Van Veen

(B) Define the following terminologies: noise, interference, and jamming.

Expert Solution

Noise - Noise is an unwanted signal which is present with the desired signal. It is the greatest enemy of the communication channel. Noise signal is usually refers to any ratio of useful information to irrelevant information. Noise reduces the quality of signals. It occurs in digital as well as analogue systems. Noise is more significant problem in wireless system than in hardwired systems. Now a days communication engineers are constantly struggling to develop better ways to deal with to deal with noise. Noises are of mainly two types white noise or Gaussian noise and coloured noise. White Noise called white because it affects all the frequency components of a signal equally. Coloured noises are those which affacts different frequency components differently.

Interference - It is defined as anything which modifies, alters, or disturbs a message signal is said to be interference of signal. It is of many types -

Adjacent channel interference - this interference is caused by extraneous power from a signal in an adjacent channel.

Co channel interference - it is also known as cross talk

Electromagnetic interference - it affacts the electrical circuits.

Intercarrier interference - it is caused by Doppler Shift in ofdm modulation.

Intersymbol interference - it is a form of disturbance of a signal in which one symbol interferes with subsequent symbols.

Jamming - jamming is babasical blocking the signal or interference with authorised wireless communication. Jammers work by the transmission of radio signals that interrupt the signal by decreasing the signal to noise ratio. Jamming is usually different from interference because interference occurs due to device malfunctions but in the other hand jamming is applied to disrupt information flow. In the United States radio jamming devices are illegal. The device which is used for jamming the signals is called jammers.

Manojponduru answered 2 years ago

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