Performance Analysis of QAM Modulation and Demodulation

The following study will investigate the performance of Multiple Quadrature Amplitude Modulation(M-QAM) in baseband modulation systems and further analyze the bit error rates (BER) performance under different conditions of communication. The error performance of several M-QAM schemes has been extensively simulated and analyzed under ideal Additive white Gaussian noise (AWGN) channel conditions. The influences of some common channel impairments, such as frequency offset and partial band interference, on the performance of the system are also taken into consideration to assess the reliability of the system in depth. The results in this paper will show both the potential and challenges of M-QAM in practical communication systems by comparing the BER under different channel models. Notably, there are usually inevitable frequency offset and interference in wireless communications. Therefore, a study on its effect on the performance may be very necessary for the further enhancement of robustness and interference resilience in modern communication systems. This work will provide enlightenment on insights into the design of the baseband modulation system and support theoretical improvements to enhance communication quality and reliability.