Hi guy,
I am currently working on ofdm example. I try to print out the channel
estimated value d_hestimate on terminal. However, I found each frame
number
followed several sets of channel estimated value. I feel so confused
because I believe channel estimation is only done in preamble for each
frame. It should be only one set of channel estimated value following
one
frame, is that right?
On Fri, Apr 5, 2013 at 6:23 AM, Yingjie C. [email protected] wrote:
Hi guy,
I am currently working on ofdm example. I try to print out the channel
estimated value d_hestimate on terminal. However, I found each frame number
followed several sets of channel estimated value. I feel so confused because
I believe channel estimation is only done in preamble for each frame. It
should be only one set of channel estimated value following one frame, is
that right?
Yes, that’s right, the hestimate should only be calculated on the
preamble. Are you doing this over the air or under simulation? I would
suggest starting in simulation to make sure that there are no outside
effects happening that causing the receiver to trigger the
re-estimation.
Are you using the VERBOSE output of the file? Just set VERBOSE to 1 at
the top of the ofdm_frame_acquisition file and it will print out its
values for you. I know we debugged using this and the estimations
looked fine. We were able to plot the channel this way, and it looked
pretty good.
Tom