kd4e wrote: > I am puzzled as to why one digital signal works well under poor > signal conditions and another does not.
You have to define "poor conditions" somehow. It may be noise, multipath, ionospheric doppler, fading, etc. Each one produces a different impairment, depending on the modulation and coding used. And generally you have several impairments combined, on various degrees of severity, to make it even "more interesting". Without a proper characterization, the results can be very confusing. One of the fortunate phrases of Lord Kelvin states that you must express magnitudes numerically to be able to grasp their meaning and leave fuzziness aside. Doesn't mean it may be easy.... 73, Jose __________________________________________ XIII Convención Científica de Ingeniería y Arquitectura 28/noviembre al 1/diciembre de 2006 Cujae, Ciudad de la Habana, Cuba http://www.cujae.edu.cu/eventos/convencion Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
