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how to filter awgn

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jessica david
jessica david 2011-4-20
is there any way to filter awgn noise from my signal.
I tried using the function smooth(signal) but it totally distorts my data.
x = randint(100,1,8); % Random signal
signal = qammod(x,8);
add_noise=awgn(signal,10);
filternoise=smooth(add_noise);

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回答（1 个）

Kaustubha Govind
Kaustubha Govind 2011-4-20
SMOOTH simply performs a moving average on the signal, which is not sufficient to remove white noise. You need a filter designed to remove white noise. For example, the DSP System Toolbox Acoustic Noise Cancellation demo uses the LMS algorithm to achieve this.

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