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Signal and types. Engr. Hinesh Kumar Lecturer I.B.T, LUMHS. Signal. A signal "is a function that conveys information about the behavior or attributes of some phenomenon".
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Signal and types Engr. Hinesh Kumar Lecturer I.B.T, LUMHS
Signal • A signal "is a function that conveys information about the behavior or attributes of some phenomenon". • In the physical world, any quantity exhibiting variation in time or variation in space (such as an image) that might provide information.. • The term "signal" includes, among others, audio ,video, speech, image, communication, geophysical, sonar, radar, medical and musical signals.
Signal Processing • A typical role for signals is in signal processing. • A common example is signal transmission between different locations. • The embodiment of a signal in electrical form is made by a transducer that converts the signal from its original form to a waveform expressed as a current (I) or a voltage (V), or an electromagnetic waveform, for example, an optical signal or radio transmission. • Once expressed as an electronic signal, the signal is available for further processing by electrical devices such as electronic amplifiers and electronic filters, and can be transmitted to a remote location by electronic transmitters and received using electronic receivers.
Static and Quasistatic • A Static Signal is an unchanging over a long period of time (Tlong). • The term quasistatic means nearly unchanging. • Quasistatic signal refers to signal that changes so slowly over a long period of time. Static Signal Quasistatic Signal
Periodic Signal • A Periodic Signal is one that repeats itself on regular basis. • Example of periodic signals include Sine wave, Sinusoidal wave and Triangular wave. • The nature of the periodic waveform is such that each waveform is such that each waveform is identical to other sat like points along the time.. Periodic Signal
Repetitive Signal • A Repetitive signal is quasiperiodic and thus bears some similarity to the periodic signal. Repetitive Signal
Transient Signal • A Transient Signal is either a one-time event or a periodic event in which the event duration is very short compared with the period of waveform. Repetitive transient or quasi-transient Signal Single Event Transient Signal