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Re: [Discuss-gnuradio] State of the art with UMTS-WCDMA

From: Nan Zhang
Subject: Re: [Discuss-gnuradio] State of the art with UMTS-WCDMA
Date: Fri, 29 Aug 2008 08:54:55 -0700

I don't have any code or implementation. Just some thought.
In my opinion, implementing cell search on gnuradio in realtime could be quite hard. Even with the aid of hardware accelerator such as decorrelator, cell search is computationally intensive in real modem. In gnuradio, all these computation has to be done in software. Also, the sampling rate in gnuratio radio is 8Msps, which is not mulitple of chip rate of UMTS (3.84MHz). Some multirate processing is required to change the sampling rate.
While real-time processing could be hard to implement given the current setting, one can always download a sample and do post-processing in non-real-time manner.

On 8/27/08, arunesh mishra <address@hidden> wrote:
Hello folks,

 I was wondering what is the current state-of-the-art with respect to being able to receive WCDMA signals - being able to listen to the pilot channel and synchronize
with the base stations. I did see some activity on the list last year-ish, but would anyone have any working code or ideas on how to go about implementing
such funtionality ?


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