Method and device for protecting power amplifier in DPD (Digital Pre-Distortion) system
A power amplification unit and power technology, which is applied in the field of mobile communication, can solve the problems of burning power amplifier, no signal output, no output power detection and protection, etc., and achieve the effect of increasing reliability and improving competitiveness
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[0026] The present invention provides a device and method for protecting a power amplifier in a DPD system, so as to solve the problem that only the average power is detected and protected when protecting the power amplifier in the prior art, which may cause instantaneous large spurs to burn the power amplifier.
[0027] The present invention provides a method for protecting power amplifier in DPD system, such as figure 1 As shown, including the following steps:
[0028] Step S1: Perform a DPD (Digital Pre-Distortion, Digital Pre-Distortion) operation on the baseband signal and the feedback signal to obtain a pre-distortion signal.
[0029] Step S2, detecting the predistortion signal, includes the following:
[0030] a) Perform power statistics of the predistortion signal within a period of time and calculate the average power, and then compare it with the preset forward average power threshold. If the average power is greater than the preset forward average power threshold , The alar...
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