Need a citation for zero IF/homodyne downconversion

Hello, I've been writing my master's thesis on a project in which I use a homodyne downconverter, and am having trouble finding decent sources to cite its theory (basically an explanation of why I and Q channels are needed for full signal reconstruction). I know the theory myself, and I can find decent descriptions online in app notes, but none of that is really suitable for citation in my bibliography. I need something from an academic paper (think IEEE) or a reference/textbook. Any leads would be appreciated.

Thanks in advance.

Baseband single LO conversion for I & Q modulated RF is well established in industry in both AM-PM and other constellations with multiple levels depending on SNR of carrier , bandwidth (BW) used and matched channel performance of the receiver with minimal group delay distortion for ISI. Check out recent papers and chips for the desired channel of interest.

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I suspect you may be referring to optical receivers but a similar approach is used in RF.
http://en.wikipedia.org/wiki/Direct_conversion_receiver

http://www.rp-photonics.com/optical_...detection.html
http://www.rp-photonics.com/software.html
http://www.rp-photonics.com/spotlight.html

Keep in mind when search there are redundant terms for orthogonal detection depending on region of terms preferred and medium of channel.

I & Q (in-phase & quadrature) = R & P ( right angle & parallel )
OFDM = Orthogonal Freq. DeModulation
It can be used in any medium, frequency and channel..
even underwater acoustics. http://indigo.ece.neu.edu/~baosheng/papers/oceans06.pdf

This is for RF receiver applications, not optical. And I've already seen the google search results, but they only turn out very recent components or research articles on specific implementations and applications for zero IF. I need a generalized source; preferably an old one which introduces the entire concept, and deals with the basic concepts, not detailed optimization (no I'm not going to cite wikipedia). I've seen while googling that a lot of articles say that the method was developed in 1932 by "a british team," but nothing more specific than that. Getting an original reference like that would be ideal.