Digital pre-distortion (DPD) parameter monitoring device and method
A technology of digital predistortion and monitoring device, applied in the field of RRU, can solve the problems of spectrum regeneration, signal interference, reduce the output power of power amplifier, etc., and achieve the effect of improving stability
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Embodiment 1
[0046] like figure 2As shown, the DPD parameter monitoring device of this embodiment mainly includes the following modules: a DPD parameter correctness check module, a DPD parameter validity check module, a DPD parameter gain and phase compensation module, and a DPD parameter to other power gears Copied module.
[0047] The DPD parameter correctness checking module includes but is not limited to one or a combination of any of the following checks. As long as one of these checks exceeds the judgment threshold, the DPD parameters need to be recalculated.
[0048] a1) Overflow judgment of DPD parameters. The DPD parameter value needs to be within a reasonable range. When the DPD parameter value exceeds a certain range, it will be judged as an abnormal DPD parameter.
[0049] a2) Judgment that the average power compensation of DPD parameter exceeds the limit. DPD digital domain processing may bring a certain gain, but when the gain is too large, it may cause overflow and damag...
Embodiment 2
[0059] In this embodiment, for a DPD system without power grading, that is, when the power is always in the same gear, the above-mentioned monitoring device is used to monitor the DPD parameters obtained by training. like image 3 The specific process is described as follows:
[0060] 1) The DPD parameters generated by the DPD parameter obtaining module enter the DPD parameter correctness checking module and the DPD parameter validity checking module respectively. The DPD parameter correctness checking module includes: overflow judgment of DPD parameters; Limit judgment; DPD parameter peak power compensation over-limit judgment; data correlation check before and after DPD processing. The DPD parameter validity check module includes: pre-checking the DPD parameters in the time domain and post-checking in the frequency domain.
[0061] 2) After passing the correctness and validity check, enter the DPD parameter gain and phase compensation module, otherwise return to the DPD pa...
Embodiment 3
[0065] For a DPD system with power grades, the power will fluctuate in different gears, the monitoring device proposed in the present invention is used to monitor the DPD parameters obtained by training. like Figure 4 The specific process is described as follows:
[0066] 1) The DPD parameters generated by the DPD parameter obtaining module enter the DPD parameter correctness checking module and the DPD parameter validity checking module respectively. The DPD parameter correctness checking module includes: overflow judgment of DPD parameters; Limit judgment; DPD parameter peak power compensation over-limit judgment; data correlation check before and after DPD processing. The DPD parameter validity check module includes: pre-checking the DPD parameters in the time domain and post-checking in the frequency domain.
[0067] 2) After passing the correctness and validity check, enter the DPD parameter gain and phase compensation module, otherwise return to the DPD parameter obta...
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