1 votes 1 votes If $S(f)$ is the power spectral density of a real, wide-sense stationary random process, then which of the following is $\text{ALWAYS}$ true? $S(0) \geq S(f)$ $S(f) \geq 0$ $S(-f)=-S(f)$ $\displaystyle{}\int_{-\infty}^{\infty} S(f) d f=0$ Others gate2007-ec + – admin asked Sep 19, 2022 • edited Feb 24, 2023 by Lakshman Bhaiya admin 46.4k points 78 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.