Understanding Modulation Techniques in Mobile Communications

This course covers the fundamentals and advanced aspects of modulation techniques used in mobile communications. It starts with the basics of Frequency Modulation (FM) and Amplitude Modulation (AM), explaining their generation, demodulation, and spectral aspects. The course then delves into the concept of angle modulation and the trade-offs between signal-to-noise ratio and bandwidth in an FM signal. It further explores the advantages of digital modulation techniques over analog ones, citing examples like QPSK, QAM, QFSK, MSK, and GMSK. The course also discusses the performance analysis of these techniques in fading channels and the importance of fading countermeasures. For instance, it explains how diversity techniques can help overcome the effects of deep fades, thereby improving the bit error rate performance in mobile scenarios.