JP3356892B2 - Distortion compensation control method and distortion compensation amplifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distortion compensating amplifying apparatus used for a base station common amplifying apparatus or a relay amplifying apparatus in, for example, an automobile telephone system, and particularly to an improvement in a method of optimizing a distortion compensating amount. The present invention relates to a distortion compensation control method and a distortion compensation amplifier.

[0002]

2. Description of the Related Art A distortion compensation amplifier is used, for example, in a base station of an automobile telephone system to remove distortion of radio waves transmitted to a mobile station and to amplify the power. FIG. 4 shows an example of a circuit of a conventional distortion compensation amplifying device. Hereinafter, the conventional device will be described with reference to FIG.

This distortion compensation amplification device has a circuit configuration using an automatic adjustment type feed forward as a nonlinear distortion compensation circuit for simultaneously amplifying radio waves of a plurality of frequencies. That is, the distortion compensation amplification device is roughly divided into a distortion detection unit 25, a distortion removal unit 26, and a control unit 27.

A directional coupler 1 for splitting an input signal (see a waveform diagram a in FIG. 4) into two signals is provided.
A vector adjuster 2 for performing vector adjustment on one of the signals branched by the directional coupler 1, a main amplifier 3 for power amplifying a signal input via the vector adjuster 2, A delay line 5 for delaying the other signal branched by the sexual coupler 1 and a directional coupler 4 to which a signal from the main amplifier 3 and a signal from the delay line 5 are applied. Things.

In the distortion detecting section 25, the main amplifier 3
In order to compensate for the intermodulation distortion generated by the directional coupler 1, the vector amount of the input signal is adjusted by the vector adjuster 2 before being input to the main amplifier 3, while the other is output from the directional coupler 1. The timing of the phase signal is
The signal is delayed by the delay line 5 so as to coincide with the timing of one signal passing through the main amplifier 3.

Then, the signal output from the main amplifier 3 (see the waveform diagram b in FIG. 4) and the signal passed through the delay line 5 (see the waveform diagram f in FIG. 4) are input to the directional coupler 4. Thus, the signal is split into two signals, that is, a signal containing only the distortion component and a signal from the main amplifier 3 containing the distortion. In the distortion detecting section 25, a pilot signal generator 11 is provided, and a pilot signal is added to the directional coupler 4 together with an output signal of the main amplifier 3.

[0007] The distortion removing unit 26 includes a vector adjuster 7 that performs vector adjustment on the distortion component extracted from the directional coupler 4, an auxiliary amplifier 8 that amplifies an output signal of the vector adjuster 7, A delay line 6 for giving a delay to the signal passed through the main amplifier 3 and taken out of the sexual coupler 4 to match the timing with the signal passed through the vector adjuster 7 and the auxiliary amplifier 8; And a vessel 9.

In the directional coupler 9, the signal from the main amplifier 3 input through the delay line 6 and the negative-phase signal from the vector adjuster 7 and the auxiliary amplifier 8 (see waveform diagram d in FIG. 4).
Are added to output a signal (see waveform diagram c in FIG. 4) in which the distortion component is canceled.

The control section 27 is for performing vector adjustment of the vector adjusters 2 and 7, and executes a CPU 19 for executing optimization control, a decoding circuit 20, a ROM 21 in which programs and the like are stored, and a temporary memory for data. A RAM 22 used for storage and the like, and two analog / digital converters (abbreviated as “A / D” in FIG.
/ D converters) 15, 16 and two digital / analog converters (abbreviated as “D / A” in FIG. 4 and hereinafter referred to as “D / A converters”) 17, 18 A pilot signal receiver 13 for detecting a pilot signal included in an output signal of the directional coupler 9 and a detector 12 for detecting a signal from the directional coupler 4 are provided as main components. It is provided.

Then, based on the output signal of the detector 12 input via the A / D converter 15 and the output signal of the pilot signal receiver 13 input via the A / D converter 16, The CPU 19 performs an optimization process for determining an optimal vector amount of the vector adjusters 2 and 7, that is, an amplitude and a phase. When a control signal is output from the CPU 19 to control the vector adjusters 2 and 7 to the amplitude and phase determined by the optimization processing, the control signal is decoded by the decoding circuit 20 and the decoded signal is D / A converted. The signals are converted into analog signals by the devices 17 and 18 and applied to the vector adjusters 2 and 7, so that the vector adjusters 2 and 7 are set to the amplitude and phase determined by the optimization processing in the CPU 19. .

[0011]

However, in the optimization processing performed in the above-mentioned conventional apparatus, especially when the main amplifier 3 employs a class AB amplifier circuit, the ambient temperature or the input signal level of this apparatus is not used. Is large, and it takes time until the amplitudes and phase amounts of the vector adjusters 2 and 7 are set to appropriate values.
There is a problem that distortion may become spurious.

The present invention has been made in view of the above circumstances, and provides a distortion compensation control method and a distortion compensation control method capable of performing quick and appropriate distortion compensation without using special high-speed operation parts even when the operating environment changes suddenly. It is an object to provide a distortion compensation amplification device.

[0013]

According to a first aspect of the present invention, there is provided a distortion compensation control method, comprising: amplifying means for amplifying power of an input signal, wherein the vector amount of the input signal is changed in accordance with a control signal externally input. Distortion detecting means for detecting a distortion component contained in an output signal of the amplifying means from a signal passing through the amplifying means and a signal bypassing the amplifying means while adjusting the distortion, and a distortion detected by the distortion detecting means. The distortion component included in the output signal is obtained by adding the distortion component in an opposite phase to the output signal of the amplifying unit while adjusting the vector amount of the component according to a control signal input externally. Elimination means for eliminating the distortion and an output signal obtained by adding the distortion components in opposite phases
And based on the distortion component, the determining a behenate vector amount put on the strain sensing means and said strain relief means, and control means for outputting a control signal to said distortion detecting means and said strain relief means A distortion compensation control method in a distortion compensation amplification device , comprising: the distortion detection unit and the distortion compensation unit.
Optimal Kasho for determining the vector quantity in the removal means
Performs management, continue to store the optimized treated vector quantity in association with the signal level of the ambient temperature and input signal, when the variation of the ambient temperature or input signal occurs, the stored vector quantity of, when the vector amount corresponding to the fluctuating ambient temperature and the input signal are present, those
The 該Be vector quantity and the vector quantity of the distortion detection means and said strain relief means, if not, varied cut
Vector corresponding to ambient temperature and signal level of input signal
Perform optimization processing to determine the amount, and
The amount of vector that was input
It is stored in association with the signal level . Claim 2
In the distortion compensation control method according to the invention described above, the control means includes:
Is distorted based on the output signal and the distortion component whose phases are added in opposite phases.
The level is judged and the distortion level does not generate spurs.
The ambient temperature and the signal level of the input signal.
The presence or absence of a change is determined, and the presence or absence of the change is determined.
If there is a change in the processing, the vector amount
Of the ambient temperature and input signal level
In response, the stored optimized vector quantity is distorted.
The vector amount in the detecting means and the distortion removing means is
After adjusting the input signal and distortion component by the vector amount, the distortion component
Is based on the output signal and the distortion component added in opposite phases.
The bell is judged and the distortion level does not cause spurious.
If it is determined that there is a change, the determination processing of the presence or absence of the change is performed again.
If it is determined that spurious will occur, the ambient temperature and
Determine the vector amount corresponding to the signal level of the input signal
Performs optimization processing, and calculates the optimized vector amount.
The ambient temperature and the signal level of the input signal.
If there is no change in the above-described process of determining whether there is a change,
The ambient temperature and the signal level of the input signal.
Optimization to determine the amount of vector
The processed vector amount is calculated based on the ambient temperature and the input signal.
Is stored in association with the signal level.

According to a third aspect of the present invention, there is provided a distortion compensating and amplifying apparatus having amplifying means for amplifying an input signal with power.
A distortion component included in an output signal of the amplifying unit is detected from a signal passed through the amplifying unit and a signal bypassed by the amplifying unit while adjusting a vector amount of the input signal according to a control signal input externally. Distortion detecting means, and adding the distortion components in opposite phases to the output signal of the amplifying means while adjusting the vector amount of the distortion component detected by the distortion detecting means in accordance with a control signal input from the outside. Means for removing the distortion component contained in the output signal, and a distortion component based on the output signal and the distortion component added in opposite phases.
Zui and determines behenate <br/> vector amount put in the distortion detecting means and the strain relief means, and control means for outputting a control signal to said distortion detecting means and the strain relief means, the input signal A level detecting means for detecting a signal level; and a temperature detecting means for detecting an ambient temperature , wherein the control means
Are the detection data of the level detecting means and the temperature detecting means.
Storage means for storing the vector amount in association with
The distortion detecting means and the distortion removing means.
Optimization to determine the amount of vector
The optimum in relation to the air temperature and the signal level of the input signal.
Storing the vectorized data in the storage means,
When the ambient temperature or the input signal fluctuates,
Of the remembered vector quantities, the fluctuating ambient temperature and
If there is a vector amount corresponding to the input signal,
The vector amount is sent to the distortion detecting means and the distortion removing means.
If not present, the vector
Vector corresponding to ambient temperature and signal level of input signal
Perform optimization processing to determine the amount, and
The amount of vector that was input
The information is stored in the storage means in association with the signal level . The distortion compensation amplifying device according to the fourth aspect of the present invention
The control means includes the output signal obtained by adding the distortion components in opposite phases and the distortion component.
The distortion level is determined based on
If it is determined that a spurious will occur, the ambient temperature and input signal
A determination process is performed to determine whether or not the signal level of the
If there is a change in the process of determining the presence or absence of motion,
Of the vector quantities stored in
Stored corresponding to ambient temperature and input signal level
Ibitsuken detecting means and Ibitsujo optimized treated vector quantity are
Vector amount in the departure means, and according to the vector amount
After adjusting the input signal and distortion components, the distortion components are added in opposite phases.
The distortion level based on the output signal and the distortion component
Determined that the distortion level does not cause spurs
And the determination processing of the presence / absence of the fluctuation is again performed, and the spurious
When the ambient temperature and the input signal
Performs optimization processing to determine the vector amount corresponding to the level.
The vector amount after the optimization processing is
And the signal level of the input signal.
Is stored in the column, and if there is no change in the above-described process of determining whether there is a change,
The ambient temperature and the signal level of the input signal.
Optimization to determine the amount of vector
The processed vector amount is calculated based on the ambient temperature and the input signal.
Is stored in association with the signal level.

In particular, the distortion detecting means adjusts a vector amount for a first directional coupler for dividing the input signal into two parts and one branch signal of the first directional coupler, and inputs the signal to the amplifying means. A first vector adjuster and the other branch signal of the first directional coupler so that the other branch signal has the same timing as the signal passed through the first vector adjuster and the amplifier. First delay means for giving a delay to the input signal, an output signal of the amplifying means and a signal passed through the first delay means are inputted, and a distortion component included in an output signal of the amplifying means is provided. A second directional coupler that outputs an output signal of the amplifying unit, and the distortion removing unit calculates a vector amount with respect to the distortion component extracted from the second directional coupler. A second vector adjuster for adjusting;
An auxiliary amplifier for amplifying an output signal of the second vector adjuster, and an output signal of the amplifying means obtained via the second directional coupler are used for the second vector adjuster and the auxiliary amplifier. A second delay means for delaying the signal so as to have the same timing as the passed signal; an output signal of the auxiliary amplifier and a signal passed through the second delay means ; It is preferable to include a third directional coupler that outputs a signal from which the distortion component has been removed.

[0016]

According to the first aspect of the present invention, the optimization processing
Multiple Thus the vector quantities are determined, continue to store in association with the level of the ambient temperature and input signal at that point, then, if there is a change in the level of ambient temperature or input signals occurs, first, stored of in the vector amount, to use a vector of Yoko if there is behenate vector quantity to correspond to the ambient temperature or input level fluctuates, corresponding
If there are no vector quantities to be
Vector, and determine the ambient temperature and input signal
By going to store in association with the bell, since the behenate vector quantity against the level of the fluctuating ambient temperature or input signals need not be determined by the arithmetic processor, in real to variations in the level of ambient temperature and input signal It will be able to respond. According to the second aspect of the present invention, the distortion level is determined based on the output signal and the distortion component obtained by adding the distortion components in opposite phases, and when it is determined that the distortion level causes spurious, the ambient temperature and the input signal are determined. A determination process is performed to determine whether or not there is a change in the signal level.If there is a variation in the determination process, a vector is calculated from the stored plurality of vector amounts using the vector amount corresponding to the changed ambient temperature or input level. When the adjuster is set and it is determined that the distortion level does not cause spurious in the state after the setting, the processing for determining whether or not there is a change in the ambient temperature and the signal level of the input signal is performed again. A vector quantity corresponding to the ambient temperature and the signal level of the input signal is obtained by processing, and stored in association with the ambient temperature at that time and the level of the input signal. If there is no variation in the determination process, we obtain a vector quantity corresponding to the signal level of the ambient temperature and input signal by the optimization process,
By storing the ambient temperature at that time in association with the level of the input signal, the distortion can be quickly and appropriately compensated for the fluctuation of the distortion level, the ambient temperature, and the signal level of the input signal. .

[0017] In the invention of claim 3, wherein, behenate vector amount put in the distortion detection means and distortion removing means is determined by the control unit, the vector amount storage means in association with the level of the ambient temperature and input signal go stored in, there is a variation in the level of the ambient temperature or input signals if behenate click <br/> torr amount to correspond to the level of the ambient temperature or input signal after the change is in the stored data of the storage means in this case, the control means controls so that the vector of the distortion detection means and distortion removing means becomes base click <br/> torr amount of its corresponding absence vector quantity
In this case, determine the vector quantity and
Record in the storage means in relation to the air temperature and the level of the input signal.
Since 憶, these control means odors Te determining vector quantity
The vector amount of the distortion detecting means and the distortion removing means is immediately set without spending the time required for the optimization processing , and the responsiveness to the fluctuation of the ambient temperature and the fluctuation of the level of the input signal is improved. is there. The invention of claim 4
In the control means, the distortion components are added in opposite phases.
Judgment of the distortion level based on the output signal and the distortion component,
If it is determined that the distortion level causes spurious,
Judgment processing for the presence or absence of fluctuations in the air temperature and the signal level of the input signal
If there is a change in the judgment process,
Atmospheric temperature or input level that fluctuated from memory data
Set vector adjuster using vector quantity corresponding to
If the distortion level does not cause spurious in the state after setting
Once determined, the ambient temperature and the signal level of the input signal again
Is performed to determine the presence or absence of fluctuations.
When the judgment is made, the ambient temperature and input signal
Vector quantity corresponding to the signal level of the signal
Storage means in relation to the ambient temperature and the level of the input signal
If there is no change in the judgment process,
Temperature and the signal level of the input signal
Find the corresponding vector quantity, and enter the
Storing in the storage means in association with the level of the force signal
And the distortion level, the ambient temperature and the signal level of the input signal
Can quickly and appropriately compensate for distortions
It can be.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the distortion compensating amplifier according to the present invention will be described below with reference to FIGS. Here, FIG. 1 is a configuration diagram in one embodiment of the distortion compensation amplifying device according to the present invention, and FIG. 2 is a flowchart showing a procedure for setting adjustment data of the vector adjuster in the distortion compensation amplifying device of the present embodiment. FIG. 3 is an explanatory diagram for explaining a storage format of adjustment data in a RAM used in the distortion compensation amplifying device of the present embodiment. The members, arrangements, and the like described below do not limit the present invention, and can be variously modified within the scope of the present invention.

First, an example of the configuration of the distortion compensation amplifying apparatus according to the present embodiment will be described with reference to the configuration shown in FIG. The distortion compensating amplifying device of the present embodiment is obtained by adding the components described below to the conventional device described with reference to FIG. 4, and most of the components are the same as the conventional device. . Therefore, in the following description, the same components as those of the conventional device are denoted by the same reference numerals, and detailed description thereof will be omitted.

The distortion compensating and amplifying apparatus according to the present embodiment includes an input level detector 30 as a level detecting means for detecting a level of an input signal at a stage preceding the directional coupler 1, and a portion near the distortion detecting section 25. A temperature sensor 31 as temperature detecting means for detecting the ambient temperature, and an analog / digital converter (FIG. 1) for converting the output signals of the input level detector 30 and the temperature sensor 31 into digital signals.
, Abbreviated as “A / D” and hereinafter referred to as “A / D converter”) 32, 33.

The operation of the present apparatus can be generally described as follows.
Each time the CPU 19 performs an optimization process for determining the amplitude and phase of the vector adjusters 2 and 7, the input level of the input signal to the apparatus by the input level detector 30 and the temperature of the wireless portion by the temperature sensor 31. The CPU 1 detects the input level and the temperature level as parameters, as will be described later.
The adjustment data of the vector adjusters 2 and 7 determined by the optimization process in step 9 are stored in the RAM 22 in the form of a table. Thereafter, when the input level and the temperature level at this time are detected again, the vector adjustment from the RAM 22 is performed. Vessels 2,7
Is read out, and the vector adjusters 2 and 7 are immediately adjusted with the adjustment data, thereby compensating for the delay in the processing due to the optimization processing and performing the distortion compensation with good responsiveness. .

Next, an optimization process in the CPU 19 for determining adjustment data for setting the amplitude and phase of the vector adjusters 2 and 7 will be described with reference to FIGS. First, a program is read from the ROM 21 to the CPU 19, and the distortion level is determined (step 100 in FIG. 2). That is, a part of the output of the main amplifier 3 detected by the detector 12 is converted into a digital signal by the A / D converter 15 and the pilot signal level detected by the pilot signal receiver 13 is represented by A / D.
What is converted into a digital signal by the D converter 16 is a CPU.
19, it is determined whether or not the distortion level is large enough to cause spurious. Then, when it is determined that spurious is generated (in the case of NO), it is determined whether or not there is a change in the input level of the apparatus or the temperature level of the wireless unit (step 102 in FIG. 2). If it is determined in step 100 that the distortion level is not high enough to cause spurious (YES), the determination process is repeated until the determination is NO.

When it is determined that there is no change in both the input level of the apparatus and the temperature level of the wireless section (in the case of NO)
Then, while proceeding to the process of step 110 described later, if it is determined that there is any change (in the case of YES), a search for adjustment data is performed (step 10 in FIG. 2).
4). That is, the adjustment data of the vector adjusters 2 and 7 is stored in the RAM 22 in the present embodiment using the input level of the apparatus and the temperature level of the wireless unit as parameters. A search is performed to determine whether the adjustment data corresponding to the level exists in the data stored in the RAM 22.

Here, the storage format of the adjustment data of the vector adjusters 2 and 7 in the RAM 22 will be described with reference to an example shown in FIG. The table for storing the adjustment data of the vector adjusters 2 and 7 shown in FIG. 3 has a temperature level on the vertical axis and an input level on the horizontal axis. The adjustment data is arranged every time.

Here, the temperature level on the vertical axis indicates the temperature of the temperature sensor 3 after being converted into a digital signal by the A / D converter 33.
The input level on the horizontal axis also means the output level of the input level detector 30 after being converted into a digital signal by the A / D converter 32. Note that the A / D converters 32 and 33 in this embodiment are
Uses 8-bit output.

In this embodiment, both the vertical and horizontal axes are:
The output levels of the A / D converters 32 and 33 are divided into groups of 20, and 13 × 13 pieces of adjustment data can be stored as a whole. For example, the area indicated by reference numeral A is where the adjustment data of the vector adjusters 2 and 7 when the temperature level is 220 to 240 and the input level is also 220 to 240 is stored (see FIG. 3). . In other areas, basically, the condition of the adjustment data stored in the same manner is determined by the relationship between the temperature level and the input level.

The adjustment data for the corresponding temperature level and input level is searched from the adjustment data table thus set. After the search, the D / A converters 17 and 18 are searched.
, Adjustment data is input to the vector adjusters 2 and 7, and the amplitudes and phases of the vector adjusters 2 and 7 are set according to the respective input data (step 106 in FIG. 2).

Then, in a state where the vector adjusters 2 and 7 are set according to the adjustment data read from the RAM 22 as described above, it is determined whether or not the distortion level is enough to cause spurious (FIG. 2). Step 108), when it is determined that the distortion level is not a level that causes spurious (in the case of YES), the process returns to the previous step 102 and the above-described series of processing is repeated.

On the other hand, when it is determined that the distortion level is a level causing spurious (in the case of NO), the RAM 2
2 means that the adjustment data read from the vector adjusters 2 and 7 was not optimal.
In the PU 19, an optimization process for determining the most appropriate adjustment data for the vector adjusters 2 and 7 is performed (steps 110 and 112 in FIG. 2).
That is, the optimization processing is performed until the optimum values of the amplitude and the phase of the vector adjusters 2 and 7 are obtained (Step 112 in FIG. 2).

When it is determined that optimization has been completed (FIG. 2)
(YES in step 112), the adjustment data is written (step 114 in FIG. 2). In other words, the adjustment data of the vector adjusters 2 and 7 determined to be optimum are written in the RAM 22 at predetermined positions using the corresponding temperature level and input level as parameters as described above with reference to FIG. At this time, if the adjustment data has already been written at a location corresponding to the corresponding temperature level and input level, the new optimum data is overwritten on the already written adjustment data. After the writing of the adjustment data is completed, the process returns to the previous step 100, and the above-described series of processing is repeated again.

Here, the operation of the present apparatus will be described briefly again.
The input signal is input to the distortion detecting unit 25 as the distortion detecting means set by the optimization method of (1), and the distortion component is detected. In the distortion removing unit 26 as the distortion removing unit, the amplitude and the phase of the vector adjuster 7 are similarly set by the optimization method of the CPU 19, so that the distortion component detected by the distortion detecting unit 25 and the main component as the amplifying unit are set. By adding the outputs of the amplifiers 3 in opposite phases and at the same level, a signal from which the distortion component has been removed can be obtained.

On the other hand, when the adjustment data of the vector adjusters 2 and 7 obtained by the optimization method in the CPU 19 are obtained as the optimum data, the input level of the input signal detected by the input level detector 30 and the temperature sensor 31 (see FIG. 3) in relation to the temperature level detected by R.
Stored in AM22. When the input level or the temperature level changes suddenly, the adjustment data corresponding to the changed input level or the temperature level is read from the RAM 22, and the amplitudes and phases of the vector adjusters 2 and 7 are based on the adjustment data. Even if the input level or the temperature level is suddenly changed, quick and appropriate distortion compensation is performed, and spurious components are prevented from being included in the output signal.

In the above-described embodiment, the storage means is realized by executing the CPU 19, the RAM 22, and the steps 112 and 114 in FIG . Further, the directional coupler 1 is a first directional coupler of claim 5 , the directional coupler 2 is a second directional coupler of claim 5 , and the directional coupler 9 is claim 5. In the third directional coupler described, the delay line 5 is
In the first delay means according to claim 5, a delay line 6 is provided.
Corresponds to the second delay means .

[0034]

As described above, according to the first and third aspects of the present invention, the vector amount is obtained by the optimization processing.
Because, the vector amount to continue to store in association with the level of ambient temperature and input signal, there is a variation in the level of the ambient temperature or input signals, behenate vector amount to correspond to the level of the fluctuating ambient temperature or input signals If this is in the stored data, this vector amount is used .
Temperature and input signal level fluctuated due to
Obtains a vector quantity corresponding to, by constructing the so that be stored, since the possible saving time corresponding to the time required to determine the vector amount again Ru been achieved by the optimization process, the ambient temperature This has the effect of optimizing instantaneously for fluctuations and level fluctuations of the input signal. In the inventions according to claims 2 and 4,
Based on the output signal and the distortion component where the distortion components are added in opposite phases
To determine the distortion level, and the distortion level
If it is determined that this occurs, the ambient temperature and the signal level of the input signal
Performs judgment processing for the presence or absence of bell fluctuation, and
When there are fluctuations, the stored vector quantities
From medium, corresponding to fluctuating ambient temperature or input level
Set the vector adjuster using the vector quantity, and
When it is determined that the distortion level does not cause spurious in the state,
Again, the presence of fluctuations in the ambient temperature and the signal level of the input signal
When it is determined that spurs occur,
Optimized processing for ambient temperature and signal level of input signal
Vector quantity corresponding to the
Is stored in association with the level of the input signal and the judgment process is performed.
If there is no change in the ambient temperature,
Vector quantity corresponding to the degree and the signal level of the input signal.
The current ambient temperature and the input signal level.
And memorize the distortion level, ambient temperature and input
Quick and appropriate distortion compensation for signal level fluctuations
This has the effect that compensation can be made.

In particular, in the device according to the third to fifth aspects of the present invention, in addition to the above effects, the optimal vector amount is immediately set for the fluctuation as described above.
Unlike the conventional case, a class AB amplifier circuit can be employed in the amplifier. Further, it is possible to provide a distortion compensation amplification device capable of performing quick and appropriate distortion compensation without using special high-speed operation parts.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a distortion compensation amplification device according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a procedure for setting adjustment data of a vector adjuster in the distortion compensation amplification apparatus according to the present embodiment.

FIG. 3 is a RAM used in the distortion compensation amplifying device of the present embodiment.
FIG. 4 is an explanatory diagram for explaining a storage format of adjustment data to the storage device.

FIG. 4 is a configuration diagram showing a configuration example of a conventional distortion compensation amplification device.

[Explanation of symbols]

1, 4, 9 directional coupler, 2, 7 vector adjuster, 3 main amplifier, 5, 6 delay line, 8 auxiliary amplifier, 11 pilot signal generator, 12 detector
13 ... Pilot signal receiver, 15, 16, 32,
33 ... A / D converter, 17, 18 ... D / A converter,
19: CPU, 20: decoding circuit, 21: ROM,
Reference numeral 22: RAM, 25: distortion detector, 26: distortion remover, 27: controller, 30: input level detector, 3
1: Temperature sensor

Continuation of the front page (72) Inventor Eiji Hirota 3-14-20 Higashinakano, Nakano-ku, Tokyo International Electric Company (56) References JP-A-5-235671 (JP, A) JP-A-62-206905 (JP, A) JP-A-4-275708 (JP, A) JP-A-3-179927 (JP, A) JP-A-4-286209 (JP, A) JP-A-8-56125 (JP, A) JP-A-5-121958 (JP, A) JP-A-5-243880 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H03F 1/30-1/32

Claims (5)

(57) [Claims] Amplifying means for amplifying the power of an input signal, wherein a signal passing through said amplifying means and said amplifying means are bypassed while adjusting a vector amount of said input signal according to a control signal inputted from the outside. And a distortion detecting means for detecting a distortion component included in the output signal of the amplifying means from the amplified signal, and adjusting the vector amount of the distortion component detected by the distortion detecting means in accordance with a control signal input from the outside. A distortion removing means for removing the distortion component included in the output signal by adding the distortion component in an opposite phase to the output signal of the amplification means ;
Based on the amount and the distortion detecting means and determines a vector amount in the distortion removing means, said strain detecting means and provided to the distortion compensation made by the control means for outputting a control signal to said distortion removing means A distortion compensation control method in an amplification device, wherein the control unit is configured to control the distortion detection unit and the distortion removal unit.
Performs optimizations to determine the definitive vector quantity,
In association with the signal level of the ambient temperature and input signal forward to store the optimized treated vector quantity, when the variation of the ambient temperature or input signal occurs, the stored base click <br/> Torr of the amount, if vector amount corresponding to the fluctuating ambient temperature and the input signal is present, an equivalent 該Be vector quantity and the vector quantity of the distortion detection means and said strain relief means, in the absence Has fluctuating ambient temperature and
Determine the vector amount corresponding to the signal level of the input signal
For the optimization process, and the optimized vector
To the ambient temperature and the signal level of the input signal.
A distortion compensation control method characterized by storing in association with . 2. The control device according to claim 1, wherein the distortion component is added in a reverse phase.
Judgment of the distortion level based on the output signal and the distortion component,
If it is determined that the distortion level causes spurious,
Judgment processing for the presence or absence of fluctuations in the air temperature and the signal level of the input signal
If there is a change in the above-mentioned process of determining whether there is a change,
In this case, the changed atmosphere
Stored corresponding to air temperature and input signal level
Distortion detection means and distortion removal means
Input as vector quantity in the stage and the vector quantity
After adjusting the signal and distortion components, the output of the
The distortion level is determined based on the force signal and the distortion component, and the
The distortion level is spurious Is determined not to occur again
Performs the process of determining the presence or absence of the above-mentioned fluctuation, and generates spurious.
Is determined, the ambient temperature and the signal level of the input signal
Perform optimization processing to determine the corresponding vector quantity,
The vector amount after the optimization processing is
Memorize in association with the signal level of the force signal, If there is no change in the above-mentioned change determination process,
Vector quantity corresponding to air temperature and signal level of input signal
Optimization processing to determine the
The amount of the vector is determined by the ambient temperature and the signal level of the input signal.
2. The method according to claim 1, wherein the information is stored in association with the information.
Distortion compensation control method. 3. An amplifying means for amplifying the power of an input signal, wherein a signal passing through the amplifying means and the amplifying means are bypassed while adjusting a vector amount of the input signal according to a control signal inputted from the outside. And a distortion detecting means for detecting a distortion component included in the output signal of the amplifying means from the amplified signal, and adjusting the vector amount of the distortion component detected by the distortion detecting means in accordance with a control signal input from the outside. A distortion removing means for removing the distortion component included in the output signal by adding the distortion component in an opposite phase to the output signal of the amplification means ;
Based on the minute and, control means for the put <br/> the distortion detecting means and said strain relief means determines behenate vector quantity, and outputs a control signal to said distortion detecting means and the strain relief means, A level detection unit for detecting a signal level of the input signal; and a temperature detection unit for detecting an ambient temperature , wherein the control unit includes the level detection unit and the temperature detection unit.
The vector amount is stored in association with the detection data of the means.
The distortion detecting means and the distortion removing means.
Optimization for Determining Vector Amounts in Dropping Means
In accordance with the ambient temperature and the signal level of the input signal.
The optimized vector amount is stored in the storage means.
Going into memory, the ambient temperature or the input signal fluctuated
In some cases, of the stored vector quantity,
If there is a vector quantity corresponding to the air temperature and the input signal,
In this case, the vector amount is calculated using the distortion detection means and the distortion removal means.
If the vector does not exist,
Corresponds to fluctuating ambient temperature and signal level of input signal
Optimization processing to determine the vector amount
The vector amount after the optimization processing is
Stored in the storage means in association with the signal level of the force signal
A distortion compensation amplifier. 4. The control means according to claim 1, wherein said distortion components are added in opposite phases.
Judgment of the distortion level based on the output signal and the distortion component,
If it is determined that the distortion level causes spurious,
Judgment processing for the presence or absence of fluctuations in the air temperature and the signal level of the input signal
If there is a change in the judgment process of the above-mentioned change,
In the case, the vector amount stored in the storage means in advance
Of the ambient temperature and input signal level
In response, the stored optimized vector quantity is distorted.
The vector amount in the detecting means and the distortion removing means is
After adjusting the input signal and distortion component by the vector amount, the distortion component
Is based on the output signal and the distortion component added in opposite phases.
The bell is judged and the distortion level does not cause spurious.
If it is determined that there is a change, the determination processing of the presence or absence of the change is performed again.
If it is determined that spurious will occur, the ambient temperature and
Determine the vector amount corresponding to the signal level of the input signal
Perform optimization processing and calculate the vector amount that has been optimized.
The ambient temperature and the signal level of the input signal.
Stored in the storage means, If there is no change in the above-mentioned change determination process,
Vector quantity corresponding to air temperature and signal level of input signal
Optimization processing to determine the
The amount of the vector is determined by the ambient temperature and the signal level of the input signal.
4. The method according to claim 3, wherein the information is stored in association with the information.
Distortion compensation amplification device. 5. A distortion detecting means, comprising: a first directional coupler for dividing an input signal into two parts; and a vector amount for one branch signal of the first directional coupler, and input to the amplifying means. A first vector adjuster and the other branch signal of the first directional coupler so that the other branch signal has the same timing as the signal passed through the first vector adjuster and the amplifier. First delay means for providing a delay to
A second directional coupling for receiving an output signal of the amplifying unit and a signal passed through the first delay unit , and outputting a distortion component included in the output signal of the amplifying unit and an output signal of the amplifying unit; And a strain removing means.
A second vector adjuster for adjusting a vector amount with respect to a distortion component extracted from the second directional coupler, an auxiliary amplifier for amplifying an output signal of the second vector adjuster; Second delay means for providing a delay so that the output signal of the amplifying means obtained through the directional coupler has the same timing as the signal passing through the second vector adjuster and the auxiliary amplifier. A third directional coupler that receives an output signal of the auxiliary amplifier and a signal that has passed through the second delay unit , and that outputs a signal from which a distortion component has been removed from the output signal of the amplification unit. The distortion compensating amplifier according to claim 3 or 4, wherein: