| 摘要 |
<p>A device for digital baseband predistortion, comprising: a transmission channel consisting of a digital-to-analog converter, a modulator, an amplifier and a power amplifier; and further comprising: a feedback channel analog portion consisting of a diode detector, a filter and an analog-to-digital converter; and a feedback channel digital portion consisting of a predistorter, a modulus unit, a predistortion coefficient generator and a feedback correction unit; the diode detector is used to obtain the envelope of the power amplifier output signals. An embodiment of the present invention also provides a method for digital baseband predistortion by using the single chip. The embodiment of the present invention uses the diode detector to achieve the feedback channel of the digital baseband predistortion. The simple structure of the diode detector not only reduces the number of radio frequency devices on the feedback channel, lowers the complexity of the hardware, reduces power consumption, but also integrates the analog portion of the feedback channel to the single chip.</p> |
