Python生成高斯白噪声white noise
- 原理
原理
r a n d o m ( N ) ⋅ ∑ x i 2 N ⋅ 1 0 − s n r / 10 random(N) \cdot \sqrt{\frac{\sum{x_{i}^{2}}}{N} \cdot 10^{-snr/10}} random(N)⋅N∑xi2⋅10−snr/10
假设序列X长度为N。
import numy as npdef generate_white_noise(X, N, snr)noise = np.random.randn(N)snr = 10 ** (snr/10)power = np.mean(np.square(X))npower = power / snrnoise = noise * np.sqrt(npower)
