This lecture introduces statistical signal processing tools for wireless communications, covering spread spectrum and narrow band communications, spectral analysis, ultra-wide band communications, and non-parametric spectrum estimation. It explores pulse coding, spectrum distribution, periodogram interpretation, and resolution, with practical Matlab exercises. The lecture also delves into harmonic signals, line spectra, and parametric spectrum estimation using the Yule Walker method. It concludes with smooth spectrum modeling, AR processes, and heart rate variability analysis through spectral estimation.