| 摘要 |
<p>The invention relates to a digital radio frequency amplification system including a main amplification channel (102, 103, 104) and distortion correction means, characterised in that the distortion correction means include a correction circuit of the type that corrects by anticipation, referred to as feedforward correction circuit (1', 2') and a pre-distortion correction circuit, the pre-distortion correction circuit including a feedback loop (140, 141) provided with a first sampling means (120) for sampling a representative signal from the output of the main amplifier in order to adapt the pre-distortion and minimise the errors at the output of the main amplifier, the main amplification channel (102, 103, 104) being supplied by a signal (Su+D1) combining a pure useful signal (Su) and a pre-distortion signal (D1), the feedforward correction circuit including a first correction channel supplied by a reference signal (SREF) and transforming same into a first correction signal, said correction channel constituting with said main amplification channel a first loop (1') which furthermore includes a double coupler (110) suitable for sampling an output signal (S1) from the main amplification channel and a combination of said output signal with the first correction signal (Se) in order to produce a second correction signal (eR).</p> |
