Digital pre-distortion method and device
A digital pre-distortion and quantitative technology, applied in the field of communication, can solve problems such as pre-distortion and inability to find business signal numbers, and achieve the effects of improving performance, reducing system computing complexity, and saving system processing resources
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Embodiment 1
[0111] A digital predistortion method provided by an embodiment of the present invention is introduced in detail.
[0112] refer to Figure 4 , shows a flow chart of a digital predistortion method in an embodiment of the present invention.
[0113] Step 100, acquire the amplitude, power and quantity of the service signal collected in real time.
[0114] The service signal can be collected through the FIFO, and the power and amplitude of the service signal entering the FIFO can be calculated. The number of service signals stored in the FIFO can be 4096, 8192, 16384, etc., all of which are integer powers of 2, and the number of service signals entering the FIFO is counted.
[0115] Step 102, judging whether the service signal is a training sequence signal according to the acquired amplitude, power and quantity of the service signal.
[0116] Whether the service signal can be used as a training sequence can be judged according to the average amplitude, peak amplitude, average ...
Embodiment 2
[0121] A digital predistortion method provided by an embodiment of the present invention is introduced in detail.
[0122] refer to Figure 5 , shows a flow chart of a digital predistortion method in an embodiment of the present invention.
[0123] Step 200, acquire the amplitude, power and quantity of the service signal collected in real time.
[0124] The service signal can be collected through the FIFO, and the power and amplitude of the service signal entering the FIFO can be calculated. The number of service signals stored in the FIFO can be 4096, 8192, 16384, etc., all of which are integer powers of 2, and the number of service signals entering the FIFO is counted.
[0125] Preferably, the step 200 may include:
[0126] Sub-step 2001, storing the service signals collected in real time into FIFO one by one.
[0127] Each time a business signal enters the FIFO.
[0128] Sub-step 2002, acquire the amplitude and power of each service signal entering the FIFO, and count ...
Embodiment 3
[0157] A digital predistortion method provided by an embodiment of the present invention is introduced in detail.
[0158] refer to Figure 6 , shows a schematic diagram of a digital predistortion method in an embodiment of the present invention.
[0159] The business signal enters the FPGA signal statistical filter module from position ①, and the switch is turned off by default. At the same time, the business signal also enters the DPD channel to update the DPD coefficient. The real part Ri and the imaginary part Rq of the service signal enter the FIFO at position ②, obtain the amplitude of the service signal, and calculate the average power of the service signal, etc. Generally, FIFO=4096, 8192 or 16384 are integer powers of 2.
[0160] Determine whether the peak amplitude of the service signal in the FIFO exceeds the upper limit of the peak amplitude, and whether the average power is within the upper and lower thresholds. If the peak amplitude exceeds the upper limit of t...
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