The 256QAM (Quadrature Amplitude Modulation) scheme is a high-level modulation technique used in digital communication systems. It is a combination of both amplitude and phase modulation, where 256 different signals or symbols are represented, each corresponding to a unique 8-bit pattern. This allows for a higher data rate, as more bits are transmitted per symbol. However, the trade-off is that it is more susceptible to noise and interference due to the closer spacing of the symbols. It is often used in situations where there is a high signal-to-noise ratio, such as cable television and high-speed internet connections, and 5G communication in high signal quality environments.
