All Questions

Tagged with
Filter by
Sorted by
Tagged with
0
votes
0answers
35 views

Signal acquisition equipment phase noise

I would like to check if there is a way to enhance an RF equipment's phase noise figure. The considered RF acquisition homodyne system includes a mixer for carrier demodulation, amplifier and filter ...
2
votes
1answer
135 views

How is a signal with SNR less than unity demodulated?

The title pretty much says it all. What technique can be used to demodulate a signal with SNR less than 1?
0
votes
1answer
612 views

Demodulation on noise

I'm new in DSP, and I'm working on dsp application involving machinery (Diagnostics based on noise), and to do this I need to make DEMON processing. I want to process the signal like in the picture (...
0
votes
1answer
451 views

Maximum Likelihood carrier phase estimation of $A\cos(2\pi f_ct)$

This question refers to the example 5.2-1 of the book "Digital Communications, 5th Edition by John Proakis, Masoud Salehi" (example 6.2-1 in the 4th edition of the book) which asks for the estimate ...
6
votes
1answer
1k views

What is the connection between analog signal to noise ratio and signal to noise ratio in the IQ plane in a quadrature demodulation system?

We would like to compute the quantitative relation between analog noise near the LO frequency and the statistics of points found in the IQ plane after IQ demodulation. In order to completely ...