MATLAB Implementation of FSK, 4FSK, PAM Modulation and Demodulation Programs

MATLAB enables the implementation of various modulation and demodulation techniques such as FSK (Frequency Shift Keying), 4FSK (4-level Frequency Shift Keying), and PAM (Pulse Amplitude Modulation). These techniques are fundamental to digital communication systems, transmitting information by altering signal frequency or amplitude characteristics. Through dedicated MATLAB programming, users can simulate and analyze these modulation schemes using key functions like fskmod(), fskdemod() for FSK implementations, and pammod(), pamdemod() for PAM systems. The 4FSK modulation typically requires custom implementation using frequency constellation mapping with phase-continuous transitions. Practical applications span wireless communications, data transmission systems, and telecommunications infrastructure. Therefore, mastering these modulation techniques and their MATLAB implementations - including proper parameter configuration, noise modeling using awgn() function, and error rate analysis through biterr() - is crucial for developing efficient digital communication systems. The implementations typically involve carrier frequency selection, symbol timing synchronization, and optimal filter design using functions like rcosdesign() for pulse shaping.