ch2_signal_system

ch2_signal_system - EEN 404 Communication Systems Ch2...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
EN 404 EEN 404 Communication Systems Ch2: Signal and System
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Signal and System • A signal is defined as the time history of some quantity, usually a oltage or current voltage or current • A system is a combination of devices and networks chosen to perform a desired function • The study of communication systems (information exchange systems) is inherently concerned with the transmission of signals through systems oug sys e s
Background image of page 2
ignal Classification Signal Classification here are many ways to classify the signals • There are many ways to classify the signals Signals Signals Deterministic Random Energy Power eriodic periodic Periodic Aperiodic
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Figure 2-1 Examples of various types of signals. (a) Deterministic inusoidal) signal (b) Unit rectangular pulse signal (sinusoidal) signal. (b) Unit rectangular pulse signal. (c) Random signal.
Background image of page 4
Periodic Signals E.g., 1: Q1: A1: aperiodic 2 Q2: A2: Q3:
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Another example: Q1: A1: Q2: A2: eriod is non nique Usually we pick the minimum positive one as period Period is non-unique. Usually, we pick the minimum positive one as period.
Background image of page 6
A useful periodic signal: • A: amplitude 0 : frequency in radians : phase in radians : rotating phasor (different from e j ) elationship to the real signal Relationship to the real signal
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Signal Energy and Power Energy: Power:
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 27

ch2_signal_system - EEN 404 Communication Systems Ch2...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online