JP2005167545A - Distortion compensation type nonlinear power amplifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a distortion compensation type nonlinear power amplifier capable of performing detection by further limiting a fault range than before. <P>SOLUTION: The signal from a demodulator 1 is inputted to a distortion compensation table 2 for multiplying the amount of distortion compensation, an output is inputted to a modulation section 3, the output of the modulation section 3 is amplified by the nonlinear power amplifier 4, one portion of the amplification output is subjected to negative feedback for comparing with a signal from the demodulation section 1, and nonlinear distortion in the nonlinear power amplifier 4 is compensated at a distortion detection section 7 by the compared result. The distortion compensation type nonlinear power amplifier comprises a distortion compensation-related portion fault detector 13 for detecting a fault at a portion that is composed of the distortion compensator 2, and the distortion detector 7, and is related to the distortion compensation with the signal from the demodulation section 1 and a signal from the distortion compensation table 2 as an input; and a fault determinator 9 for determining the fault at the portion that is composed of the distortion compensation table 2 and the distortion detector 7 and is related to the distortion compensation by an output from the distortion compensation-related portion fault detector 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a nonlinear power amplifying apparatus that performs distortion compensation.

  In a non-linear power amplifier using a non-linear power amplifier with non-linear distortion, a pre-distortion correction that minimizes an error from the input signal by negatively feeding back the output signal of the non-linear power amplifier is performed.

  One method for determining the failure of such a distortion-compensating nonlinear power amplifier is to compare the power of the negative feedback signal from the input signal and the nonlinear power amplifier and determine the presence or absence of oscillation by Fourier transform ( For example, see Patent Document 1.)

FIG. 2 shows a conventional example of this distortion compensation type nonlinear power amplifying apparatus. In the figure, reference numeral 1 denotes a first demodulator that performs quadrature demodulation using an IF input signal as an input and outputs baseband signals I ₁ and Q _1. Reference numeral 2 denotes a baseband signal I ₁ and Q ₁ that are input as distortion compensation amounts. A distortion compensation table for forming baseband signals I ₂ and Q ₂ by performing an operation of multiplying or adding ΔR and Δθ, 3 forms a modulated signal composed of an RF signal with baseband signals I ₂ and Q ₂ as inputs The modulation unit 4 is a nonlinear power amplifier that amplifies the modulated signal, and 5 is a distributor that distributes and outputs the amplified output. Reference numeral 6 denotes a second demodulator that forms the baseband signals I ₃ and Q ₃ using the output of the distributor 5 as a negative feedback input, and reference numeral 7 inputs the baseband signals I ₁ and Q ₁ and the baseband signals I ₃ and Q ₃ . As a distortion detection unit for forming distortion compensation amounts ΔR and Δθ, and 8 indicates a system failure detection using a Fourier transform circuit for detecting a system failure using the baseband signals I ₁ and Q ₁ and the baseband signals I ₃ and Q ₃ as inputs. Part.

  However, in such a distortion compensation type nonlinear power amplifying apparatus, since a system failure is detected by the system failure detection unit 8 using a Fourier transform circuit, there is a problem that it takes time and increases power consumption.

  Therefore, a distortion compensation type nonlinear power amplifying apparatus in which the system failure detection unit 8 is formed by a differentiation circuit or a D / A converter instead of the Fourier transform circuit has been proposed. (For example, see Patent Document 1 described above.) In the distortion compensation type nonlinear power amplifying apparatus in which the system failure detection unit 8 is formed by a differentiation circuit, the change of the distortion compensation coefficient is differentiated, and the convergence time is detected to detect the failure. In a distortion compensation type nonlinear power amplification device in which the system failure detection unit 8 is formed by a D / A converter, a distortion compensation coefficient is converted into an analog amount, and failure detection is performed by a temporal change.

According to such a distortion compensation type nonlinear power amplifying apparatus, there is an advantage that calculation time can be shortened and power consumption can be reduced.
JP 2003-8360 A

  However, in any conventional distortion compensation nonlinear power amplifying apparatus, the input of the system failure detection unit 8 uses the output of the first demodulation unit 1 and the output of the distributor 5, so the distortion compensation nonlinear power There was a problem that I did not know where the amplifier was out of order.

  An object of the present invention is to provide a distortion-compensated nonlinear power amplifying apparatus that can detect a failure range with a limited range.

 The configuration of the present invention that achieves the above object will be described as follows.

The present invention performs an operation of multiplying or adding a distortion compensation amount to a signal from a demodulation unit using a distortion compensation table, inputting the output to the modulation unit, amplifying the output of the modulation unit with a nonlinear power amplifier, and amplifying the amplification In a distortion-compensated nonlinear power amplifier that negatively feeds a part of the output and compares it with the signal from the demodulator, and calculates the distortion compensation amount in the distortion detector based on the comparison result.
A distortion compensation-related partial failure detection unit that detects a failure related to distortion compensation using the signal from the demodulation unit and the signal from the distortion compensation table as inputs, and outputs from the distortion compensation-related partial failure detection unit And a failure determination unit that determines a failure in a portion related to distortion compensation.

Further, the present invention performs an operation of multiplying or adding a distortion compensation amount to a signal from a demodulator by using a distortion compensation table, inputting the output to the modulator, amplifying the output of the modulator by a nonlinear power amplifier, In the distortion-compensation type nonlinear power amplification device in which a part of the amplified output is negatively fed back and compared with the signal from the demodulation unit, and the distortion compensation amount is calculated by the distortion detection unit based on the comparison result.
An amplifier failure detection unit that detects a failure of the nonlinear power amplifier by receiving a signal from the distortion compensation table and a signal from the nonlinear power amplifier, and an output from the amplifier failure detection unit And a failure determination unit that performs the determination.

The present invention also provides a first demodulator that forms baseband signals I ₁ and Q ₁ by performing quadrature demodulation using the modulated signal as an input signal, and receives the baseband signals I ₁ and Q ₁ as inputs. A distortion compensation table for forming baseband signals I ₂ and Q ₂ by performing an operation of multiplying or adding distortion compensation amounts ΔR and Δθ, and a signal modulated with the baseband signals I ₂ and Q ₂ as inputs. A modulation unit; a nonlinear power amplifier that amplifies the modulated signal; a second demodulation unit that forms baseband signals I ₃ and Q ₃ using a part of the output of the nonlinear power amplifier as an input; and the baseband polar varying a first polar coordinate conversion section that forms a polar coordinate signal R _1, theta ₁ performs polar coordinate conversion as an input signal I _1, Q _1, the baseband signals I _2, Q ₂ as an input Polar signals R _{2 performs,} and a second polar coordinate conversion unit to form a theta _2, the baseband signal I _3, Q ₃ polar signals R ₃ performs polar coordinate conversion as an _input, a third forming the theta ₃ A non-linear distortion of the non-linear power amplifier, and a polar detection unit that forms the distortion compensation amounts ΔR and Δθ with the polar coordinate signals R ₁ and θ ₁ and the polar coordinate signals R ₃ and θ ₃ as inputs. In a distortion-compensated nonlinear power amplifier that compensates for
A distortion compensation-related partial failure detection unit that detects a failure of the distortion compensation table and the distortion detection unit by using the polar coordinate signals R ₁ , θ ₁ and the polar coordinate signals R ₂ , θ ₂ as inputs, and the distortion compensation-related partial failure The distortion compensation table and a failure determination unit that determines a failure of the distortion detection unit based on an output from the detection unit.

The present invention also provides a first demodulator that forms baseband signals I ₁ and Q ₁ by performing quadrature demodulation using the modulated signal as an input signal, and receives the baseband signals I ₁ and Q ₁ as inputs. A distortion compensation table for forming baseband signals I ₂ and Q ₂ by performing an operation of multiplying or adding distortion compensation amounts ΔR and Δθ, and a signal modulated with the baseband signals I ₂ and Q ₂ as inputs. A modulation unit; a nonlinear power amplifier that amplifies the modulated signal; a second demodulation unit that forms baseband signals I ₃ and Q ₃ using a part of the output of the nonlinear power amplifier as an input; and the baseband signals I _1, Q ₁ and the base-band signals I _3, Q ₃ and the distortion compensation amount ΔR as input, and a distortion detection unit which forms a Δθ to compensate for the nonlinear distortion of the nonlinear power amplifier In compensation type nonlinear power amplifier,
A distortion compensation-related partial fault detection unit for detecting faults in the distortion compensation table and the distortion detection unit with the baseband signals I ₁ and Q ₁ and the baseband signals I ₂ and Q ₂ as inputs, and the distortion compensation relationship The distortion compensation table and a failure determination unit that determines a failure of the distortion detection unit based on an output from the partial failure detection unit.

The present invention also provides a first demodulator that forms baseband signals I ₁ and Q ₁ by performing quadrature demodulation using the modulated signal as an input signal, and receives the baseband signals I ₁ and Q ₁ as inputs. A distortion compensation table for forming baseband signals I ₂ and Q ₂ by performing an operation of multiplying or adding distortion compensation amounts ΔR and Δθ, and a signal modulated with the baseband signals I ₂ and Q ₂ as inputs. A modulation unit; a nonlinear power amplifier that amplifies the modulated signal; a second demodulation unit that forms baseband signals I ₃ and Q ₃ using a part of the output of the nonlinear power amplifier as an input; and the baseband polar varying a first polar coordinate conversion section that forms a polar coordinate signal R _1, theta ₁ performs polar coordinate conversion as an input signal I _1, Q _1, the baseband signals I _2, Q ₂ as an input Polar signals R _{2 performs,} and a second polar coordinate conversion unit to form a theta _2, the baseband signal I _3, Q ₃ polar signals R ₃ performs polar coordinate conversion as an _input, a third forming the theta ₃ A non-linear distortion of the non-linear power amplifier, and a polar detection unit that forms the distortion compensation amounts ΔR and Δθ with the polar coordinate signals R ₁ and θ ₁ and the polar coordinate signals R ₃ and θ ₃ as inputs. In a distortion-compensated nonlinear power amplifier that compensates for
An amplifier failure detection unit for detecting a failure of the nonlinear power amplifier by using the polar coordinate signals R ₂ and θ ₂ and the polar coordinate signals R ₃ and θ ₃ as inputs, and a failure of the nonlinear power amplifier by an output from the amplifier failure detection unit And a failure determination unit that performs the above determination.

Furthermore, the present invention provides a first demodulator that forms baseband signals I ₁ and Q ₁ by performing quadrature demodulation on the modulated signal as an input signal, and inputs the baseband signals I ₁ and Q ₁ to these. A distortion compensation table for forming baseband signals I ₂ and Q ₂ by performing an operation of multiplying or adding distortion compensation amounts ΔR and Δθ, and a signal modulated with the baseband signals I ₂ and Q ₂ as inputs. A modulation unit; a nonlinear power amplifier that amplifies the modulated signal; a second demodulation unit that forms baseband signals I ₃ and Q ₃ using a part of the output of the nonlinear power amplifier as an input; and the baseband to compensate for the nonlinear distortion of the nonlinear power amplifier comprises signal I _1, Q ₁ and the base-band signals I _3, the distortion compensation amount ΔR and Q ₃ as inputs, and a strain detection unit for forming a Δθ In the distortion compensation formula nonlinear power amplifier,
An amplifier failure detector for detecting a failure of the nonlinear power amplifier by using the baseband signals I ₂ and Q ₂ and the baseband signals I ₃ and Q ₃ as inputs, and the nonlinear power as an output from the amplifier failure detector And a failure determination unit that determines a failure of the amplifier.

  According to the distortion compensation type nonlinear power amplifying apparatus of the present invention, the failure range is not detected like the conventional failure detection as a whole but the failure detection of the part related to the distortion compensation or the failure detection of the nonlinear power amplifier. It can be detected in a limited manner.

  In addition, failure detection using polar coordinate signals has the advantage of reducing the amount of memory used for the distortion compensation table.

  In addition, if the failure determination unit is configured to change the reference value for failure determination according to the value of the temperature sensor that detects the temperature of the device used on the input / output line, the temperature characteristics of the device used It is possible to make a failure determination accordingly.

  FIG. 1 is a block diagram showing an example of the best mode for carrying out a distortion-compensating nonlinear power amplifier according to the present invention. Note that portions corresponding to those in FIG. 2 described above are denoted by the same reference numerals.

Reference numeral 10 denotes a first polar coordinate converter that receives the baseband signals I ₁ and Q ₁ output from the first demodulator ₁ and performs polar coordinate conversion to output polar coordinate signals R ₁ and θ _1. Reference numeral 11 denotes a distortion compensation table. 2 is a second polar coordinate converter 12 that performs polar coordinate conversion using the baseband signals I ₂ and Q ₂ output from 2 and outputs polar coordinate signals R ₂ and θ _2. The second demodulator 6 is fed back negatively. Is a _third polar coordinate conversion unit that performs polar coordinate conversion using the baseband signals I ₃ and Q ₃ output from, and outputs polar coordinate signals R ₃ and θ ₃ . The distortion detector 7 of this example is configured to form distortion compensation amounts ΔR and Δθ by using polar coordinate signals R ₁ and θ ₁ and polar coordinate signals R ₃ and θ ₃ as inputs. Further, the system failure detection unit 8 of this example is also configured to detect a system failure with the polar coordinate signals R ₁ and θ ₁ and the polar coordinate signals R ₃ and θ ₃ as inputs. 13 is a distortion compensation-related partial failure detection unit that detects failures in the distortion compensation table 2 and the distortion detection unit 7 that are related to distortion compensation by using the polar coordinate signals R ₁ and θ ₁ and the polar coordinate signals R ₂ and θ ₂ as inputs. It is. The detection signal of the distortion compensation related partial failure detection unit 13 is input to the failure determination unit 9 so that the failure determination of the distortion compensation table 2 and the distortion detection unit 7 is performed. Reference numeral 14 denotes an amplifier failure detection unit that detects a failure of the nonlinear power amplifier 4 with the polar coordinate signals R ₂ and θ ₂ and the polar coordinate signals R ₃ and θ ₃ as inputs. The detection signal of the amplifier failure detection unit 14 is input to the failure determination unit 9 so that the failure of the nonlinear power amplifier 4 is determined. Reference numeral 15 denotes a device used on the input / output line from the first demodulator 1 to the distributor 5, which is a device whose characteristics change depending on the temperature, for example, a temperature sensor attached to the nonlinear power amplifier 4 in this example. The output of the temperature sensor 15 is input to the failure determination unit 9. The failure determination unit 9 is configured to change the failure determination reference value according to the value of the temperature sensor 15 that detects the temperature of the nonlinear power amplifier 4.

In such a distortion compensation type nonlinear power amplifying apparatus, the first demodulator 1 performs quadrature demodulation using the modulated signal composed of the IF input signal as an input, outputs baseband signals I ₁ and Q ₁ , and distorts them. The information is input to the compensation table 2 and the first polar coordinate converter 10.

In the distortion compensation table 2, the baseband signals I ₁ and Q ₁ are input, and the baseband signals I ₂ and Q ₂ are formed by multiplying or adding the distortion compensation amounts ΔR and Δθ to the baseband signals I ₂ and Q _2. I ₂ and Q ₂ are input to the modulation unit 3 and the second polar coordinate conversion unit 11.

The first polar transformation unit 10 to which the baseband signals I ₁ and Q ₁ are input performs polar transformation and outputs amplitude and phase polar coordinate signals R ₁ and θ ₁ , which are used as the distortion detection unit 7 and the system failure. The data is input to the detection unit 8 and the distortion compensation related partial failure detection unit 13.

The modulation unit 3 to which the baseband signals I ₂ and Q ₂ are input forms a modulated signal composed of an RF signal, which is input to the nonlinear power amplifier 4 for amplification, and the amplified RF signal, that is, the amplified modulation signal. Is distributed by the distributor 5, one of the distributed modulation signals is output, and the other modulation signal is input to the second demodulator 6 as a negative feedback signal. When the modulated signal is input, the second demodulator 6 outputs baseband signals I ₃ and Q ₃ , and inputs them to the third polar coordinate converter 12. When the baseband signals I ₃ and Q ₃ are input, the third polar coordinate conversion unit 12 performs polar coordinate conversion and outputs polar coordinate signals R ₃ and θ ₃ , which are output from the distortion detection unit 7 and the system failure detection unit 8. To the amplifier failure detection unit 14.

The second polar coordinate conversion unit 11 to which the baseband signals I ₂ and Q ₂ are input performs polar coordinate conversion and outputs polar coordinate signals R ₂ and θ ₂ , which are used as the distortion compensation related partial failure detection unit 13 and the amplifier failure. Input to the detector 14.

The distortion detector 7 receives the polar coordinate signals R ₁ , θ ₁ and the polar coordinate signals R ₃ , θ ₃ as inputs to form distortion compensation amounts ΔR, Δθ, and inputs them to the distortion compensation table 2 as described above.

The system failure detection unit 8 detects a system failure using the polar coordinate signals R ₁ and θ ₁ and the polar coordinate signals R ₃ and θ ₃ as inputs, and the failure determination unit 9 determines the failure of the system failure detection unit 8 based on the output. .

The distortion compensation related partial failure detection unit 13 detects a failure of the distortion compensation table 2 or the distortion detection unit 7 with the polar coordinate signals R ₁ and θ ₁ and the polar coordinate signals R ₂ and θ ₂ as inputs.

The amplifier failure detector 14 detects a failure of the nonlinear power amplifier 4 with the polar coordinate signals R ₂ and θ ₂ and the polar coordinate signals R ₃ and θ ₃ as inputs.

  The failure determination unit 9 changes the reference value for failure determination according to the value of the temperature sensor that detects the temperature of the device used on the input / output line. Determine the failure.

  According to such a distortion compensation type non-linear power amplifying device, the system failure detection unit 8 can detect the entire system failure, and the distortion compensation related partial failure detection unit 13 includes the distortion compensation table 2 and the distortion detection unit 7. The failure of the portion related to the can be detected, and the failure of the nonlinear power amplifier 4 can be detected by the amplifier failure detection unit 14. That is, the distortion compensation-related partial failure detection unit 13 and the amplifier failure detection unit 14 can detect a failure by limiting the failure range from the conventional one.

  When fault detection is performed using polar coordinate signals as in this example, there is an advantage that the amount of memory used for the distortion compensation table can be reduced.

In the example illustrated in FIG. 1, the system failure detection unit 8, the distortion compensation related partial failure detection unit 13, and the amplifier failure detection unit 14 have polar coordinate signals R ₁ , θ ₁ and R ₂ , θ ₂ and R ₃ , θ _3. However, it is also possible to detect a failure using the baseband signals I ₁ , Q ₁ and I ₂ , Q ₂ and I ₃ , and Q ₃ as inputs. That is, the distortion detector 7 receives the baseband signals I ₁ and Q 1 from the first demodulator ₁ and the baseband signals I ₃ and Q ₃ from the second demodulator 6 as inputs of the nonlinear power amplifier 4. Distortion compensation amounts ΔR and Δθ for compensating for nonlinear distortion are calculated. System failure detecting unit 8 detects a system failure and a baseband signal I _3, Q ₃ from the baseband signal I _1, Q ₁ and the second demodulating unit 6 from the first demodulator 1 as an input. The distortion compensation related partial fault detection unit 13 receives the baseband signals I ₁ and Q ₁ from the first demodulation unit 1 and the baseband signals I ₂ and Q ₂ from the distortion compensation table 2 as inputs, A failure of a portion related to distortion compensation composed of the distortion detector 7 is detected. Amplifier failure detection unit 14, detects the failure of the non-linear power amplifier 4 and a baseband signal I _3, Q ₃ from the baseband signal I _2, Q ₂ and the second demodulating unit 6 from the distortion compensation table 2 as an input To do.

  Furthermore, if the failure determination unit 9 determines to change the failure determination reference value according to the value of the temperature sensor 15 that detects the temperature of the device used on the input / output line, the temperature of the device used It is possible to make a failure determination according to the characteristics.

  The change of the failure determination reference value in the failure determination unit 9 using the temperature sensor 15 can also be applied to the conventional example shown in FIG.

It is a block diagram which shows an example of the best form for implementing the distortion compensation type | mold nonlinear power amplifier which concerns on this invention. It is a block diagram which shows the structure of the conventional distortion compensation type nonlinear power amplifier.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st demodulation part 2 Distortion compensation table 3 Modulation part 4 Nonlinear power amplifier 5 Divider 6 2nd demodulation part 7 Distortion detection part 8 System failure detection part 9 Failure determination part 10 1st polar coordinate conversion part 11 2nd Polar coordinate conversion unit 12 Third polar coordinate conversion unit 13 Strain compensation related partial failure detection unit 14 Amplifier failure detection unit 15 Temperature sensor

Claims (7)

An operation for multiplying or adding a distortion compensation amount to the signal from the demodulation unit is performed in the distortion compensation table, the output is input to the modulation unit, the output of the modulation unit is amplified by the nonlinear power amplifier, and a part of the amplified output In a distortion compensation type nonlinear power amplifying apparatus in which the distortion compensation amount is calculated by the distortion detection unit based on the comparison result by negative feedback and comparing with the signal from the demodulation unit,
A distortion compensation-related partial failure detection unit that detects a failure related to distortion compensation using the signal from the demodulation unit and the signal from the distortion compensation table as inputs, and outputs from the distortion compensation-related partial failure detection unit A distortion compensation type nonlinear power amplifying apparatus, comprising: a failure determination unit that determines a failure of a portion related to distortion compensation. An operation for multiplying or adding a distortion compensation amount to the signal from the demodulation unit is performed in the distortion compensation table, the output is input to the modulation unit, the output of the modulation unit is amplified by the nonlinear power amplifier, and a part of the amplified output In a distortion compensation type nonlinear power amplifying apparatus in which the distortion compensation amount is calculated by the distortion detection unit based on the comparison result by negative feedback and comparing with the signal from the demodulation unit,
An amplifier failure detection unit that detects a failure of the nonlinear power amplifier by receiving a signal from the distortion compensation table and a signal from the nonlinear power amplifier, and an output from the amplifier failure detection unit A distortion compensation type nonlinear power amplifying apparatus comprising: a failure determination unit that performs determination. A first demodulator that forms a baseband signal I ₁ , Q ₁ by performing quadrature demodulation on the modulated signal as an input signal, and receives the baseband signals I ₁ , Q ₁ as distortion compensation amounts ΔR, A distortion compensation table that forms baseband signals I ₂ and Q ₂ by performing an operation of multiplying or adding Δθ, a modulation unit that forms a signal modulated with the baseband signals I ₂ and Q ₂ as input, and A non-linear power amplifier that amplifies the modulated signal; a second demodulator that forms a baseband signal I ₃ , Q ₃ by using a part of the output of the non-linear power amplifier as an input; and the baseband signals I ₁ , Q polar coordinate signal R ₁ performs polar coordinate conversion to ₁ as an _input, a first polar coordinate conversion unit to form a theta _1, pole seat performs polar coordinate conversion as input the baseband signal I _2, Q ₂ A second polar coordinate conversion section which forms a signal R _2, theta _2, the baseband signal I _3, Q ₃ polar signals R ₃ performs polar coordinate conversion as an _input, a third polar coordinate conversion unit to form a theta ₃ And a distortion detecting unit that forms the distortion compensation amounts ΔR and Δθ with the polar coordinate signals R ₁ and θ ₁ and the polar coordinate signals R ₃ and θ ₃ as inputs, and that compensates for the nonlinear distortion of the nonlinear power amplifier. In the compensated nonlinear power amplifier,
A distortion compensation-related partial failure detection unit that detects a failure of the distortion compensation table and the distortion detection unit by using the polar coordinate signals R ₁ , θ ₁ and the polar coordinate signals R ₂ , θ ₂ as inputs, and the distortion compensation-related partial failure A distortion-compensating nonlinear power amplification apparatus comprising: the distortion compensation table based on an output from a detection unit; and a failure determination unit that determines a failure of the distortion detection unit. A first demodulator that forms a baseband signal I ₁ , Q ₁ by performing quadrature demodulation on the modulated signal as an input signal, and receives the baseband signals I ₁ , Q ₁ as distortion compensation amounts ΔR, A distortion compensation table that forms baseband signals I ₂ and Q ₂ by performing an operation of multiplying or adding Δθ, a modulation unit that forms a signal modulated with the baseband signals I ₂ and Q ₂ as input, and A non-linear power amplifier that amplifies the modulated signal; a second demodulator that forms a baseband signal I ₃ , Q ₃ with a part of the output of the non-linear power amplifier as an input; and the baseband signal I ₁ , Q ₁ and the baseband signals I _3, Q ₃ and the distortion compensation amount [Delta] R, the distortion compensation type nonlinear to compensate for the nonlinear distortion of the nonlinear power amplifier and a distortion detecting section for forming a Δθ as input In a force amplifier,
A distortion compensation-related partial fault detection unit for detecting faults in the distortion compensation table and the distortion detection unit with the baseband signals I ₁ and Q ₁ and the baseband signals I ₂ and Q ₂ as inputs, and the distortion compensation relationship A distortion-compensated nonlinear power amplification device comprising: the distortion compensation table based on an output from a partial failure detection unit; and a failure determination unit that determines a failure of the distortion detection unit. A first demodulator that forms a baseband signal I ₁ , Q ₁ by performing quadrature demodulation on the modulated signal as an input signal, and receives the baseband signals I ₁ , Q ₁ as distortion compensation amounts ΔR, A distortion compensation table that forms baseband signals I ₂ and Q ₂ by performing an operation of multiplying or adding Δθ, a modulation unit that forms a signal modulated with the baseband signals I ₂ and Q ₂ as input, and A non-linear power amplifier that amplifies the modulated signal; a second demodulator that forms a baseband signal I ₃ , Q ₃ by using a part of the output of the non-linear power amplifier as an input; and the baseband signals I ₁ , Q polar coordinate signal R ₁ performs polar coordinate conversion to ₁ as an _input, a first polar coordinate conversion unit to form a theta _1, pole seat performs polar coordinate conversion as input the baseband signal I _2, Q ₂ A second polar coordinate conversion section which forms a signal R _2, theta _2, the baseband signal I _3, Q ₃ polar signals R ₃ performs polar coordinate conversion as an _input, a third polar coordinate conversion unit to form a theta ₃ And a distortion detecting unit that forms the distortion compensation amounts ΔR and Δθ with the polar coordinate signals R ₁ and θ ₁ and the polar coordinate signals R ₃ and θ ₃ as inputs, and that compensates for the nonlinear distortion of the nonlinear power amplifier. In the compensated nonlinear power amplifier,
An amplifier failure detection unit for detecting a failure of the nonlinear power amplifier using the polar coordinate signals R ₂ and θ ₂ and the polar coordinate signals R ₃ and θ ₃ as inputs, and a failure of the nonlinear power amplifier by an output from the amplifier failure detection unit A distortion compensation type non-linear power amplifying apparatus comprising: a failure determination unit that determines A first demodulator that forms a baseband signal I ₁ , Q ₁ by performing quadrature demodulation on the modulated signal as an input signal, and receives the baseband signals I ₁ , Q ₁ as distortion compensation amounts ΔR, A distortion compensation table that forms baseband signals I ₂ and Q ₂ by performing an operation of multiplying or adding Δθ, a modulation unit that forms a signal modulated with the baseband signals I ₂ and Q ₂ as input, and A non-linear power amplifier that amplifies the modulated signal; a second demodulator that forms a baseband signal I ₃ , Q ₃ by using a part of the output of the non-linear power amplifier as an input; and the baseband signals I ₁ , Q ₁ and the baseband signals I _3, Q ₃ and the distortion compensation amount [Delta] R, the distortion compensation type nonlinear to compensate for the nonlinear distortion of the nonlinear power amplifier and a distortion detecting section for forming a Δθ as input In a force amplifier,
An amplifier failure detector for detecting a failure of the nonlinear power amplifier by using the baseband signals I ₂ and Q ₂ and the baseband signals I ₃ and Q ₃ as inputs, and the nonlinear power as an output from the amplifier failure detector A distortion compensation type nonlinear power amplifying apparatus comprising: a failure determination unit that determines a failure of an amplifier.   The said failure determination part changes and changes the reference value of failure determination according to the value of the temperature sensor which detects the temperature of the apparatus used on an input-output line, The determination is characterized by the above-mentioned. 6. The distortion-compensated nonlinear power amplifying device according to claim 6.

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