Generation, Spectral Simulation, and Filter Transmission Simulation of AM, FM, BPSK, and MSK Signals

This article explores the generation of standard communication signals including AM, FM, BPSK, and MSK. We will first examine the underlying principles and implementation methods for signal generation, where key MATLAB functions like `ammod` for AM, `fmmod` for FM, `pskmod` for BPSK, and proprietary MSK modulation algorithms will be discussed with parameter configuration examples. Subsequently, we conduct spectral simulations using FFT-based analysis to characterize frequency domain properties, demonstrating how to visualize power spectral density using `pwelch` or `periodogram` functions with proper windowing techniques. Finally, we implement filter transmission simulations using digital filters (Butterworth, Chebyshev) to optimize signal quality and performance metrics, showing practical implementation with `filter` function and frequency response analysis using `freqz`. Through these systematic steps, we provide comprehensive insights into signal generation and processing workflows for enhanced application in communication systems.