What's negative frequency?
时间：04-09
整理：3721RD
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In the following paper, on page 4:
http://amsc.tamu.edu/SIS/Publication...al/2007_28.pdf
It is said:
In ideal case, the spectrum of the complex LO should consist of a single tone (positive LO in this case); the mismatch of the LOs generates a small negative LO component.
How to understand this?
http://amsc.tamu.edu/SIS/Publication...al/2007_28.pdf
It is said:
In ideal case, the spectrum of the complex LO should consist of a single tone (positive LO in this case); the mismatch of the LOs generates a small negative LO component.
How to understand this?
A +ve frequency sinewave can be represented as a counterclockwise rotating vector in the complex plane. A -ve frequency sinusoid will be represented as a clockwise rotating vector in the complex plane.
You can read more on complex signal processing in K. Martin's paper:
complex signal processing is not complex
I don't understand too, but the mismatch must reduce the image rejection.
So the negative LO component may be the difference of I/Q path.
Hi,
See the attachment on describing the negative frequency.
Can someone provide me the paper?
complex signal processing is not complex