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BPNN-based radio-frequency power amplifier temperature characteristic modeling method

A BPNN model, temperature characteristic technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as abnormal time-consuming, and achieve the effect of strong practical guidance.

Inactive Publication Date: 2018-07-10
TIANJIN UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Predicting the characteristics of RF power amplifiers under a wide range of temperature changes requires a large number of actual tests, and the actual test process is extremely time-consuming, and it is impossible for the actual test points to cover all temperatures continuously of

Method used

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  • BPNN-based radio-frequency power amplifier temperature characteristic modeling method
  • BPNN-based radio-frequency power amplifier temperature characteristic modeling method
  • BPNN-based radio-frequency power amplifier temperature characteristic modeling method

Examples

Experimental program
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Embodiment

[0030] Example: 0.1–1.2GHz CMOS RF Power Amplifier

[0031] Step 1. Use the environmental test box to carry out the test. The test temperature range is -25 to 125°C, the power supply voltage is 3.3V, and the scanning frequency is 100MHz to 1.2GHz. Use a vector network analyzer and a spectrum analyzer to record the actual measurement of the temperature characteristics of the RF power amplifier data, test circuit diagram as figure 2 shown;

[0032] According to the obtained measured data of the temperature characteristics of the RF power amplifier, the measured data are divided into two groups, which are respectively used as the training data and test data of the BPNN model.

[0033] Step two, determine the input variables (input power, frequency and temperature) and output variables (output power, S parameters and PAE) of the BPNN model.

[0034] Step 3, import the selected training data into the BPNN model, and train the BPNN model.

[0035] Step 4, import the selected tes...

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Abstract

The invention discloses a BPNN-based radio-frequency power amplifier temperature characteristic modeling method. The method comprises the steps of selecting training data and test data of a BPNN modelaccording to actual measurement data of an obtained radio-frequency power amplifier temperature characteristic; determining an input variable and an output variable of the BPNN model; importing the training data to the BPNN model for training the BPNN model; importing the test data to the trained BPNN model, comparing an output result and a test result of the BPNN model, and calculating an errorbetween the output result and the test result; comparing a test error MSE of the BPNN model and a precision expectation value of the BPNN model, and if the test error MSE is smaller than the precisionexpectation value, finishing the training of the BPNN model; and if the test error MSE is greater than the precision expectation value, adjusting parameters for retraining, and until the MSE is smaller than the precision expectation value, finishing the training. By applying a BPNN, the prediction of a performance index change situation of a radio-frequency power amplifier in a given temperatureinterval is realized.

Description

technical field [0001] The invention relates to the field of modeling the temperature characteristics of radio frequency power amplifiers, and more specifically relates to a BPNN-based method for modeling the temperature characteristics of radio frequency power amplifiers. Background technique [0002] The RF power amplifier is an indispensable core circuit module of the RF front-end, and its performance directly determines the performance of the wireless communication system. The performance of RF power amplifiers is greatly affected by temperature, and this defect cannot be avoided in the actual working process. The results of the literature survey show that a complete device temperature model has not been established yet, resulting in the designed RF power amplifier can only meet the requirements within a certain temperature range. When the operating temperature of the RF power amplifier changes (especially when the temperature changes in a large range), the characterist...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F30/30G06F30/367G06F2119/08
Inventor 马建国周绍华傅海鹏
Owner TIANJIN UNIV