| 摘要 |
A method for transforming digital amplitude as well as phase or frequency modulation information into analog signals for controlling analog amplifier circuitry, comprises: providing first and second digital signals representing phase angle; converting said signals into analog signals; mixing said analog signals with oscillator signals to obtain an analog, modulated signal; providing a third digital signal corresponding to amplitude; converting this signal into an analog signal; and feeding said analog, modulated signal and said analog signal to said analog amplifier circuitry. A digital signal set consists of two digital signals representing phase angle in the form of a phase unit vector, and one digital signal representing amplitude. A Radio Transmitter, use of the method, use of the digital signal set and use of the radio transmitter in mobile equipment, preferably a mobile, cellular telephone, is disclosed as well.
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