Constellation Point Modulation Phase Adjustment for High Frequency Noise

The constellation points are divided into multiple groups (first group, second group, third group) with different phase characteristics. By segmenting the modulation symbols into groups that are differently affected by phase noise, the system can selectively process or prioritize certain groups during demodulation, thereby improving overall demodulation performance in high frequency scenes.

The invention changes the phase parameter of modulation symbols by introducing multiple constellation point groups with distinct phase offsets. This parameter transformation allows the system to operate in a phase domain where the harmful phase noise has reduced impact, effectively converting a problematic parameter (phase) into a manageable characteristic through deliberate phase shifting.

The modulation scheme uses a composite structure combining multiple constellation point groups (first group with phase 0, second group with phase θ1, third group with phase θ2) within a single modulation symbol. This composite modulation approach integrates multiple phase components to create a robust signal structure that maintains efficiency while resisting phase noise degradation.

The invention extends the conventional two-dimensional constellation diagram by introducing an additional phase dimension through multiple grouped constellation points. This dimensional expansion allows the system to encode information not only in amplitude and phase but also in the grouping structure, providing an extra degree of freedom to combat phase noise while maintaining spectral efficiency.