Modulation Error Ratio

Just to let you know, after deleting the period ('.')

A signal sent by an ideal transmitter or received by a receiver would have all constellation points precisely at the ideal locations, however various imperfections in the implementation (such as noise, low image rejection ratio, phase noise, carrier suppression, distortion, etc.)

or signal path cause the actual constellation points to deviate from the ideal locations.

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Focus on Test. There are some extracts of a post pasted below, which came from a Get The Best reception thread. Hi Neil. Focus on Test from Rohde & Schwarz offers a huge number of informative PDFs, white-papers, webinars videos and general information on many test topics. Modulation Error Ratio (MER) The modulation error ratio (MER) is a measure of the signal-to-noise ratio (SNR) in a digitally modulated signal. just before your '%eyeplot.m 10/29/19 Neil Robertson' command I was able run your interesting MATLAB code just fine. Discussed were some important aspects of DTV reception, along with some clear misunderstandings, and points that could confuse a reader.