| View previous topic :: View next topic |
| Author |
Message |
Muzaffer Kal Guest
|
Posted: Wed Nov 19, 2008 9:28 am Post subject: equalizer output issue - eqout.jpg (0/1) |
|
|
Hi everyone,
I'm working on an LMS adaptive filter which is behaving in somewhat of
an unexpected way. The attached image shows the histogram of the
equalizer output after convergence; my slicer thresholds are at 0.5
and -0.5 (ie anything above 0.5 is sliced to 1, anything below -0.5 is
sliced to -1 and anything in between is sliced to 0; this is a 3 level
code.) Then I use an error generated from this sliced value and the
actual output to adapt the filter.
As one can see the mean of the outputs close to 1 and -1 are not
really 1 and -1 which is what I expected. Also the distributions of
the outputs around 1,-1 are not really symmetric; again something I'd
expect to see. Obviously what I am trying to do is to make the
histogram more coalesced around 1,0,-1 to get a more distance between
decision points.
I know the question is a little vague without a lot more detail but
does anyone have any comments on why this might be happening?
Thanks.
Muzaffer Kal
DSPIA INC.
ASIC/FPGA Design Services
http://www.dspia.com |
|
| |
|
Back to top |
Muzaffer Kal Guest
|
Posted: Wed Nov 19, 2008 9:28 am Post subject: Re: equalizer output issue - eqout.jpg (0/1) |
|
|
On Tue, 18 Nov 2008 23:27:42 -0800, Muzaffer Kal <kal@dspia.com>
wrote:
Here is the image.
ÿØÿà JFIF ` ` ÿÛ C
$.' ",#(7),01444'9=82<.342ÿÛ C
2!!22222222222222222222222222222222222222222222222222ÿÀ ËØ" | |