RE: [Discuss-gnuradio] A question about the synchronization

[Robert McGwier]

For what purpose?  If you are simply tuning a receiver to a new
frequency and can take the I/Q baseband, then no synchrony is
required.  If you are attempting to demodulate QAM inside that
I/Q channel, you are indeed required to do carrier and symbol
tracking.

Bob

-----Original Message-----
From: address@hidden
[mailto:address@hidden Behalf
Of Dawei Shen
Sent: Thursday, March 24, 2005 10:16 PM
To: Sachi; address@hidden
Subject: Re: [Discuss-gnuradio] A question about the synchronization


Hi, guys

I am also stuck with this.
After the ADC, at the quadrature downconverter, when
we convert the IF frequency signal to two IQ base band
signals, do we need carrier synchronization? My
knowledge on communications is not enough, any
pointers from you would be appreciated.

BTW: what kind of applications here would require
synchronication, and any help on how to implement it? 

Thank you very much for your time.

Dawei




--- Sachi  wrote:
> Hi Eric and Matt
> 
> When the input IF signal passes quadrature
> downconverter, does any kind of carrier and symbol
> synchronization is performed in the FPGA code? If
> so,
> which algorithm did you use?
> 
> Thanks
> 
> Sachi
> 
> 
>               
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