Do you remember which parts you did not implement? Apparently make the alamouti work is harder than I though...
Thanks Vanessa On Thu, Oct 27, 2011 at 9:33 AM, Vanessa Gardellin <vanessa.gardel...@iit.cnr.it> wrote: >> Dear all, >>> >>> I am trying to use the alamouti code implemented by trondeau. >>> Studying the gr_ofdm_frame_acquisition I found several concepts that >>> are not clear to me: >> >> >> Wow, this code is pretty old, and we never did finish it. I hope you get it >> working! I'd love to see the results. > > Yes I know... I am trying to implement alamouti and this is the only > thing that I have found... do you know about newer code? and/or > working one? > >> >>> >>> 1) d_phase_count: what does it mean? >> >> We have a look up table for various phase rotations to use in the >> calculations instead of recalculating them every time. This is the index >> into the LUT. > > In the code you never used "d_phase_lut"... so this explain a lot of things... > >> >>> >>> 2) coarse_freq_comp(int freq_delta, int count): which is the meaning >>> of this function? >> >> If the frequency offset is larger than a subcarrier spacing, we want to >> correct for that. Once the number of subcarrier offset is found, we use this >> function to recenter it. The fine frequency correct has already been taken >> care of to center the signals to the center of a subcarrier. >> >>> >>> 3) what "-M_TWOPI*freq_delta*d_cplen/d_fft_length" represents? >> >> This is the integer number of subarriers (freq_delta) and the phase >> correction per subcarrier. >> >>> >>> Thank you >>> >>> Vanessa >> >> Tom >> > > Thanks > > Vanessa > > -- > Vanessa GARDELLIN, Ph.D. > Researcher > Institute for Informatics and Telematics (IIT), > Italian National Research Council (CNR) > Via G. Moruzzi 1 > 56124 Pisa - ITALY > Phone: +390503153267 > Room: B65/c > E-mail: vanessa.gardel...@iit.cnr.it > WWW: http://www.iit.cnr.it/staff/vanessa.gardellin/ > Skype: gardellin.vanessa > -- Vanessa GARDELLIN, Ph.D. Researcher Institute for Informatics and Telematics (IIT), Italian National Research Council (CNR) Via G. Moruzzi 1 56124 Pisa - ITALY Phone: +390503153267 Room: B65/c E-mail: vanessa.gardel...@iit.cnr.it WWW: http://www.iit.cnr.it/staff/vanessa.gardellin/ Skype: gardellin.vanessa _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
