Hi everybody,
I'm trying to do narrowband channel estimation in gnuradio benchmark. The above is the figure I get, the horizonal ordinate is the samples, the vertical ordinate is the absolute value of the channel. My professor says the changing range is too big, almost 20 percent. And I have tried to set the tx-amplitude ( transmission power) from the default 0.25 to 0.5 and 1, but it didn't help. And even get a bigger range of variance with transmission power 1.
Has anyone do similar experiment in lab environment? Is there any parameters that might bring any differences?
Thanks in advance!
Ada