Thank you. Unfortunately I am still trying to make the 2x1 working because I can receive the preamble and compute the estimate matrix but the headers are always wrong. Did someone solve this problem?
Thank you Vanessa On Wed, Nov 9, 2011 at 4:01 AM, Tom Rondeau <trondeau1...@gmail.com> wrote: > On Tue, Nov 8, 2011 at 4:51 AM, Vanessa Gardellin > <vanessa.gardel...@iit.cnr.it> wrote: >> >> Do you remember which parts you did not implement? >> >> Apparently make the alamouti work is harder than I though... >> >> Thanks >> Vanessa > > I know that we got the 2x1 (2 TX and 1 RX) working, and we did 1x2 with > maximum ratio and equal gain (obviously not Alamouti). I know we were close > with the 2x2 Alamouti, but we ran out of time and didn't manage to track > down one of the major bugs. Neither of use has had time since to finish it. > Tom > > >> >> 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 > > -- 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
