功率谱 Resources

Showing items tagged with "功率谱"

Generate a random signal and two sinusoidal signals with different but closely-spaced frequencies, then perform comprehensive signal analysis including: (1) calculating autocorrelation coefficients and correlation functions with corresponding plots; (2) computing power spectra using different parametric modeling methods; (3) estimating parameters for AR, MA, and ARMA models using maximum likelihood estimation and recursive least squares, with comparison to MATLAB toolbox functions; (4) spectral estimation using notch filtering and MUSIC methods; (5) noise reduction using Wiener and LMS filtering

MATLAB 260 views Tagged

This content covers: 1. Baseband input waveform and its power spectral density 2. QPSK modulated signal and its power spectrum 3. AWGN channel output and its power spectrum 4. Signal constellation diagrams before and after Rayleigh channel transmission 5. Bit error rate performance under AWGN and Rayleigh fading channel conditions with theoretical AWGN curves, all BER curves plotted using identical coordinate scales

MATLAB 246 views Tagged

Various methods for power spectrum estimation via Fourier Transform: Periodogram method, Modified Periodogram with segmentation, Welch's method for reduced variance, Multitaper Method (MTM) using multiple orthogonal windows, Maximum Entropy Method (MEM) for high-resolution estimation, and Multiple Signal Classification (MUSIC) for frequency detection. Implementation approaches include FFT computation, windowing functions, and spectrum averaging techniques.

MATLAB 253 views Tagged

Implementation of 16QAM signals with root-raised cosine roll-off factor of 0.35, including customizable parameters and power spectral density analysis. This MATLAB-based solution demonstrates digital modulation techniques with configurable filter characteristics.

MATLAB 295 views Tagged