From: Ron Kane (email@example.com)
Date: Mon Feb 26 2001 - 16:50:56 PST
I and Q refer to "In-phase" and "Quadrature-phase" components of a signal.
Think of a vector in the X-Y plane at an angle off the X-axis. The
projection onto the X-axis is the I and the projection onto the Y-axis is Q.
In the RF world when a signal is downconverted using a mixing
(multiplication) process you'll end up with only a sine-part or cosine-part
result. Sometimes complex downconverters are used so that both components
are available for later processing / demodulation.
From: Grossman, Brett [mailto:firstname.lastname@example.org]
Sent: Monday, February 26, 2001 4:24 PM
Subject: [SI-LIST] : Ignorance in I & Q
Can any of you RF folks out there lend me a hand and tell me what I & Q are,
and why they are called I & Q?
I know this is a simple question, but none of my old RF books seem to
explain (though a few do use these terms).
Intel Test Tooling Operations
**** To unsubscribe from si-list or si-list-digest: send e-mail to
email@example.com. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
This archive was generated by hypermail 2b29 : Tue May 08 2001 - 14:30:57 PDT