December 2005
Intermediate to advanced
475 pages
12h 6m
English
Content preview from Signals and Systems
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Appendix
RANDOM SIGNALS
The signals like noise voltage in a resistor due to thermal voltage, temperature in a city every morning or during the whole day, load on a power station etc. cannot be expressed any suitable mathematical expression. Therefore it is impossible to represent them by any definite graph. These signals are termed as non-deterministic or random signals shown in Fig. A1.
Fig. A1 Random signal
Figure A2 shows the readings obtained by a digital multimeter for a random signal which may not be able to assume all the values but only the certain values in which case it is a continuous time discrete random signal. If we take samples ...
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