SIGNAL CHARACTERISTICS

1. Signal Characteristics
Asst.Prof. Rupali Lohar
Dept. of Computer Science & Engineering
B. R. Harne College Of Engineering & Technology, Karav, Post Vangani (W Tal
Ambernath, Mumbai, Maharashtra 421503

2. SIGNAL
• A data communication signal is any modulated electromagnetic wave
-- or digital pulse -- over which data is transmitted from one location
to another in a network.
• This signal is composed of two basic parts -- baseband signal
(information) and the carrier signal -- which are mixed with each
other through the process of modulation.
• Signals in data communications are generated by electronic
communication devices, and are able to travel over wired and
wireless media in order to reach their desired location.

3. Classification
• Analog signal
An analog signal is any continuous signal
In an electrical signal, the voltage, current, or frequency of the signal
may be varied to represent the information.

4. Digital signal
• A digital signal is a signal that is constructed from a discrete set of
waveforms
• A logic signal is a digital signal with only two possible values

7. Signal processing
• A typical role for signals is in signal processing. 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.

9. Signal Characteristics,
• Magnitude - generally refers to the maximum value of a signal
• Range - difference between maximum and minimum values of a signal
• Amplitude - height of the signal. .
• Frequency - describes the time variation of a signal
• Static - signal does not change over time period of interest
• Deterministic - signal can be described by an equation
• Non-deterministic - describes a signal which has no discernible
pattern of repetition and cannot be described by a simple equation.