CMA Equalizer

GNU Radio
1

Sir,

What do the number of taps in the CMA equalizer block represent, I hope
it
is the channel size. Should it be the number of tap coefficients given
for
the variable ‘taps’ in the channel model block. If I give ‘taps’ in the
channel model block (I am considering the basic awgn channel model
block)
as taps =[a1+jb1,a2+jb2,a3+jb3,a4+jb4], what should be the Num. Taps in
the
CMA equalizer block.I am using the polyphase clock synchronizer between
the
channel model block and the equalizer.

Please help.Looking forward for your reply.

Thanks
Merry

2

On Mon, Mar 23, 2015 at 3:51 AM, Merry D. [email protected]
wrote:

Please help.Looking forward for your reply.

Thanks
Merry

Yes and no. The number of taps is to shape the equalizer’s response
appropriately for the channel. Generally, we don’t know anymore more
than
some statistics about the channel and so we try to select the number of
taps in the filter according to that. It won’t be perfect since channels
are always changing, so we try and balance the complexity of the
algorithm
with the response to the channel. The more taps, the more accurate you
get,
but at greater computational cost.

So no one can really answer this question for you.

Tom