M-ary quadrature amplitude modulation (MQAM), simply known as QAM, is employed in many digital communication systems, including 16-QAM, 64-QAM, and 256-QAM in DOCSIS, an international telecommunications standard to provide high-speed Internet access over cable TV.

2024年12月2日 · M-QAM（M-ary Quadrature Amplitude Modulation，M进制 正交 幅度调制）是一种高阶数字调制技术，其中M表示调制符号集合中的符号数，也称为调制阶数。 M-QAM调制解调器在数字通信系统中用于提高数据传输的效率和带宽利用率。 本文给出AWGN信道的M-QAM通信系统 性能 仿真的MATLAB源代码与仿真结果。 （1） 比特到符号映射：在调制过程中，首先将一组比特（通常是2的整数倍，例如2、4、6、8比特）映射到一个符号上。 对于M-QAM，每个 …

Using blocks from the SIMULINK Block Library, the Signal Processing Blockset, and the Communications Blockset, design a MQAM detector, patterned after the one shown above, that is compatible with the modulator from Part I.

Recent theoretical studies of communication systems show much interest on high-level modulation, such as M-ary quadrature amplitude modulation (M-QAM), and most

2012年10月10日 · A generic simulation technique to simulate M-ary QAM modulations is given here. Plot error rates for all M-QAM over AWGN, Rayleigh, Rician flat-fading.

2021年7月28日 · M-ary quadrature amplitude modulation (M-QAM) is the most preferred modulation scheme in wireless communication popularly known for its high noise immunity, much more efficient utilisation of channel bandwidth (spectral efficiency) for the same average signal power and its reliability for higher data rate transmission over the same channel.

2021年3月22日 · 正交幅度调制又称为正交振幅键控，记作QAM (Quadrature Amplitude Modulation)。 QAM是一种将两种调幅信号 (2ASK和2PSK)汇合到一个信道的方法，因此会双倍扩展有效带宽。

In this paper, two variants of M-ary QAM, namely 64-QAM and 256-QAM, are studied in Matlab/Simulink environment. The studies are done in terms of effects caused by such factors as input...

Wireless communication systems have made tremendous advances, using various modulation schemes considering different channel environments substantially influencing their performance. Data may be conveyed effortlessly and with low errors by using appropriate modulation algorithms and capitalizing on favorable channel characteristics. As a result, it …

M-ary Quadrature Amplitude Modulation (QAM) is a widely used modulation technique that provides high transmission rates with high bandwidth efficiency and with correct configuration, high energy efficiency. However, finding the expression of the bit error probability of M-ary QAM is not as straight forward as finding its symbol error probability.