Additive Gaussian Noise – Definition and Pronunciation
What is Additive Gaussian noise?
Noise that disturbs the digitally-modulated signal during analog transmission, for instance in the analog channel. Additive superimposed noise normally has a constant power density and a Gaussian amplitude distribution throughout the bandwidth of a channel. If no other error is present at the same time, the points representing the ideal signal status are expanded to form circular “clouds”.
Additive Gaussian Noise Examples
A DVB-S2 system can operate at C/N from -2,4 dB (using QPSK with FEC at 1/4 rate) to 16 dB (using 32-APSK with FEC at 9/10 rate), assuming an Additive White Gaussian Noise (AWGN) channel and ideal demodulator.
From “DVB-S2 Modulation Extensions and Other Advances”.
Pronunciation of Additive Gaussian noise
[ˈædɪtɪv ˈɡaʊʃən nɔɪz]
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