APPENDIX H
Random Variables and Processes
IN MANY PLACES in the book, we use random variables and random processes to model noise, polarization, and network traffic. Understanding the statistical nature of these parameters is essential in predicting the performance of communication systems.
H.1 Random Variables
A random variable X is characterized by a probability distribution function
The derivative of Fx(x) is the probability density function
Note that
In many cases, we will be interested in obtaining the expectation, or ensemble average, associated ...
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