2 Simulation » History » Version 7

MERIOCHAUD, Antoine, 12/15/2015 11:53 AM

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h3. 2. Simulation
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First, we decided to design our signal analyser and to test it with simulated signals such as sine waves.
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To do so, a VI (Labview program) able to generate a noisy signal has been created. This noisy signal is the addition of three basic signals and a white Gaussian noise. For each basic signal we can set the signal type, the frequency, the amplitude and the offset. For the noise, we can set the noise standard deviation.
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Consequently we can insert the noisy signal into our signal analyser to test it.
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For example if we set 3 sine waves with different frequencies and amplitudes we observe this spectrum :
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!3sinus.png!
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+Figure 13: Power spectrum of three different sine waves+
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We can also observe the spectrum of a noisy sine wave :
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!sinus_and_noise.png!
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+Figure 14: Power spectrum of a noisy sine wave+
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In the two cases, the spectrum match with the expected values (frequencies and amplitudes)