State of the art with UMTS-WCDMA

GNU Radio
1

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 ?

Thanks.
Arunesh.

2

Hi,

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.

Best,
Nan