Hi Immi. This paper is one of the better overviews of the CORDIC algorithm in FPGAs: http://www.andraka.com/files/crdcsrvy.pdf
Also, if you search the archives of this list, there are threads regarding the specific application of the CORDIC algorithm in the USRP FPGA designs. For example: http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2013-April/034497.html http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2014-December/039692.html -Robin On Tue, Nov 6, 2018 at 8:58 AM imran qureshi via USRP-users < usrp-users@lists.ettus.com> wrote: > Hi, > I want to learn the cordic implementation of the duc_chain, and want to > understand how the quadrant selection is done in the cordic_z.v code for > vector rotation.(fpga > <https://github.com/EttusResearch/fpga/tree/61cdf981dcfe8823b7941840c744b51c7994b79f> > /usrp3 > <https://github.com/EttusResearch/fpga/tree/61cdf981dcfe8823b7941840c744b51c7994b79f/usrp3> > /lib > <https://github.com/EttusResearch/fpga/tree/61cdf981dcfe8823b7941840c744b51c7994b79f/usrp3/lib> > /dsp > <https://github.com/EttusResearch/fpga/tree/61cdf981dcfe8823b7941840c744b51c7994b79f/usrp3/lib/dsp> > /cordic_z24.v) > code snippet > > case (zi[zwidth-1:zwidth-2]) > 2'b00, 2'b11 : > begin > x0 <= xi_ext; > y0 <= yi_ext; > end > 2'b01, 2'b10 : > begin > x0 <= -xi_ext; > y0 <= -yi_ext; > end > endcase // case(zi[zwidth-1:zwidth-2]) > Regards, > Immi > _______________________________________________ > USRP-users mailing list > USRP-users@lists.ettus.com > http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >
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