| 摘要 |
A modulator ( 10 ) and method provides a programmable phase rotation for supporting different modulation formats and different phase rotations. The modulator ( 10 ) includes a programmable symbol counter ( 32 ) and symbol phase rotation logic ( 31 ) operatively responsive to programmable phase rotation size data ( 36 ) and programmable counter size data ( 30 ). The modulator ( 10 ) can be used to communicate with different modulation formats employing different phase rotation conventions as used in different communication systems. The symbol phase rotation logic ( 31 ) produces rotated in-phase data ( 20 ) and rotated quadrature data ( 22 ) in response to receiving at least received symbol data ( 24 ), programmable phase rotation size data ( 36 ), and symbol count data ( 32 ) based on programmable counter size data ( 30 ). According to another embodiment, the phase rotations of the modulator ( 10 ) may be dynamically selectable such that the phase rotations may be selected to accommodate changes in channel characteristics in real time.
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