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A method and device for digital predistortion

A digital pre-distortion and quantity technology, applied in the field of communications, can solve the problems of inability to find digital and pre-distortion of service signals, and achieve the effects of reducing system computational complexity, improving performance, and saving system processing resources

Active Publication Date: 2017-12-05
DATANG MOBILE COMM EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a digital pre-distortion method and device to solve the problem that it is impossible to find a suitable service signal as a training sequence for digital pre-distortion

Method used

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  • A method and device for digital predistortion
  • A method and device for digital predistortion
  • A method and device for digital predistortion

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Experimental program
Comparison scheme
Effect test

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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Abstract

The invention provides a digital pre-distortion method and device. The method comprises the following steps: obtaining the amplitude, power and quantity of a service signal collected in real time; according to the obtained amplitude, power and quantity of the service signal, judging whether the service signal is a training sequence signal or not; when the service signal is the training sequence signal, using the service signal for digital pre-distortion. The technical scheme can effectively cover the status differences and the diversity of a base station and a transmitter during working in an outfield and furthest saves limited system processing resources. The technical scheme contains the optimal sequence acquisition function under the FDD non-full service situation, fully ensures the coverage of a training sequence for the service signal on the aspects of peak amplitude and average power distribution, overcomes the defects of the traditional technology on the aspect of training sequence generation and the service feature matching while greatly reducing the computational complexity of the system, and improves the DPD processing performance.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a digital predistortion method and device. Background technique [0002] The existing DPD (Digital Pre-Distortion, digital pre-distortion) training pre-distortion coefficient has two modes: one is a real-time data acquisition mode, and the other is a delayed synchronous data acquisition mode. Real-time data collection mode: As long as the DPD software has a coefficient update requirement or reaches the synchronization period, it will immediately restart data collection, and store the collected data in the unit corresponding to the sequentially increasing address until the address is accumulated to 4095. Delay synchronous data acquisition mode: it is more suitable for the time domain structure of the known signal, and it is predicted that a certain segment of the signal has better statistical characteristics, which can be well applied to parameter estimation, such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/49H04L27/26
Inventor 熊军张岩王新民段滔伍坚邹郓
Owner DATANG MOBILE COMM EQUIP CO LTD
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