Autocorrelation matrix in Matlab & Python — build R for Wiener / MVDR
Build the autocorrelation (covariance) matrix R from snapshots in Matlab or NumPy — including complex conjugate correlation — for Wiener, LMS, and MVDR beamformers.
Auto-Correlation
White noise in Matlab — generate AWGN, plot PSD, check variance
Simulate white / Gaussian noise in Matlab: generate with randn, verify variance and flat PSD, then reuse the noise model in BER simulations.
Walsh–Hadamard codes — generate the matrix and simulate in Matlab
Walsh–Hadamard spreading codes: how to build the Hadamard matrix, orthogonality properties, and a Matlab simulation for CDMA-style use.