RE: [soft_radio] Re: AM demod from I/Q in hardware

[mike . gudaitis]

Try using only one of your I/Q channels;  for example, take the I channel, and ignore the Q channel. Then use a simple detector circuit to demodulate the signal from the carrier. MikeG. From: Alberto I2PHD [mailto:[EMAIL PROTECTED] Sent: Thursday, August 25, 2005 12:29 PM To: soft_radio@yahoogroups.com Subject: [soft_radio] Re: AM demod from I/Q in hardware   Chris,   I can't help you here... I haven't the faintest idea on how to compute sqrt(I^2 + Q^2) in hardware, apart from using a look-up table programmed in a ROM... maybe someone else will stand up and suggest a simpler way. 73  Alberto  I2PHD --------------------------------------- Chris Hirt wrote: Hi all Perhaps my question is stupid, but I am momentary at the end of my ideas. What the heck is the demodulation of AM if I have a I/Q signal ? My homebrew HDR-2005 (= HardwareDefinedRadio 2005 ;-) is a mixture between QRP2001, SDR-1000 and other concepts. It sounds great in SSB. I demodulate LSB, USB or both but not AM. Yes, yes I know M = srt(I^2 + Q^2), but how I do it in hardware ! Up to now all my trials with AM ended in much distortion. Does anybody knows how I produce a clear AM from I and Q with (analog) hardware? Best regards Chris . YAHOO! GROUPS LINKS  Visit your group "soft_radio" on the web.    To unsubscribe from this group, send an email to:  [EMAIL PROTECTED]    Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.