Reply by Vladimir Vassilevsky●December 15, 20062006-12-15
patrick.melet@dmradiocom.fr wrote:
> Hi,
>
> How the pilot symbol assisted QAM works ?
It works well, if you don't ask too much.
>
> What are the symbol information sent on this Pilot ?
A training sequence known to the receiver.
>
> It's in the same frequency band than the QAM modulation ?
Yes, and that's the whole point.
>
> I think we send a BPSK pilot over the QAM modulation in time duplex ?
Yes. The pilot is time multiplexed with the information bearing signal.
The pilot can be any signal with the uniform spectrum like QAM.
> Do you have good paper on that, I found nothing over google...
The pilot is used for the periodical training of the equalizer to
alleviate the multipath effects.
Vladimir Vassilevsky
DSP and Mixed Signal Design Consultant
http://www.abvolt.com
Reply by ●December 15, 20062006-12-15
Hi,
How the pilot symbol assisted QAM works ?
What are the symbol information sent on this Pilot ?
It's in the same frequency band than the QAM modulation ?
I think we send a BPSK pilot over the QAM modulation in time duplex ?
Do you have good paper on that, I found nothing over google...
Thanks