I was on a call the other night with someone who asserted that you didn't need an I & Q representation for a direct-conversion receiver, and that I and Q could be synthesized later from a real-mode-only baseband signal.
I know that very-early (1940s) direct-conversion receivers didn't use I and Q signal chains, but they were typically used for demodulating AM signals, where the +/- frequency ambiguity wouldn't have been an issue. So, my feeling is that you *absolutely need* the I and Q "form" in order to disambiguate +/- frequencies when dealing with direct-conversion baseband signals. Who's right? -- Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
