:) I solved it myself..thanx!
※ 引述《huhu (huhu)》之銘言：
> Dear all: This question includes Up-sampler and WSS concept..may I have any
> idea from you? Thanx :-)
> Question:
> Let x[n] be a WSS process with auto-correlation function R[m].
> Then x[n] goes into a up-sampler with coefficient L to get an
> output y[n]. Finally, y[n] goes into a FIR filter to get an
> output z[n]. Determine whether the random process z[n] also WSS?
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= [Origin] 中興電機 拿鐵屋 bbs.ee.nchu.edu.tw
= [Author] huhu post from cpe-72-227-52-99.stny.res.rr.com