JP5943422B2 - Transmission device, transmission level control method thereof, and program - Google Patents

Description

  The present invention relates to a transmission apparatus and a transmission level control method thereof, and more particularly to a transmission apparatus and a transmission level control method thereof that control a transmission level of an orthogonal modulation signal of a baseband signal using a feedback loop.

  In the transmission apparatus related to the present invention, when the transmission level of the modulated wave signal is controlled, it is necessary to integrate the feedback signal of the transmission signal for a time proportional to the symbol rate, determine the transmission level, and perform level control. . That is, there is a problem that the time until the transmission level is converged is proportional to the integration time. Further, since the integration circuit is switched for each modulation method and symbol rate, there is a problem that it is not possible to cope with addition / change of the modulation method without adding a circuit (see FIG. 6 of Patent Document 1).

  FIG. 8 is a block diagram of an example of a transmission apparatus related to the present invention. Referring to the figure, the transmitting apparatus is composed of constituent units A and B. When level control is not performed, baseband signals I and Q signals are quadrature modulated by DAC 1, amplified by IF AMP 2, converted to RF by MIXER 3, and then by RF AMP 4 The amplified signal (configuration unit A) becomes the input signal of the configuration unit B, and the input signal is amplified and output by the VGA 5 and PA 6 of the configuration unit B.

  On the other hand, when performing level control, a COUPLER 7 is provided on the output side of the PA 6, and a part of the output is fed back by the COUPLER 7. The feedback signals are Variable ATT 15, PWR DETECTOR 13, ADC 12, Calculator 10, and It is input to VGA 5 through DAC 8.

  Here, the VGA 5 is a variable gain amplifier, and when the output voltage of the DAC 8 is input as a control voltage, the gain changes in proportion to the voltage. When there are a plurality of transmission output settings, the output level of the VGA 5 is changed by switching the output voltage of the DAC 8, and the final output level is switched.

  If the output level does not fluctuate in any case in this operation, it is not necessary to perform control by forming a feedback loop, and the time until convergence is only the rise time of each part, so that the time is shortened. However, the gain of each unit varies due to variations in temperature, power supply voltage, and the like.

  When the feedback loop is configured, the COUPLER 7 is arranged on the PA6 output line as described above, and the output signal is distributed and monitored. The distributed signal is converted from an RF signal to a voltage signal by the PWR DETECTOR 13. Then, AD (Analog to Digital) conversion of the voltage signal is performed, time integration in proportion to the symbol rate is performed, the output level is determined, and the output level is adjusted by increasing / decreasing the output voltage of the DAC 8 for the excess / deficiency. The VARIABLE ATT 15 is used to prevent the input level of the PWR DETECTOR 13 from changing even if the transmission output setting is changed.

  On the other hand, the invention described in Patent Document 1 describes that a variable gain amplifier amplifies a high frequency modulation signal with a gain corresponding to an adjustment signal, and a detector detects the level of an output signal through branching and attenuating means. Yes. The comparator also compares the levels before and after the modulation signal amplification (after scale conversion), and outputs the excess / deficiency signal to the hold circuit. The hold circuit determines the gain of the variable gain amplifier based on the initial value and the excess / deficiency signal. And output an adjustment signal.

  In addition, the level detection unit detects the level of the output signal branch and the feedback signal, and the variable attenuator determines the level of the output signal branch and the feedback signal according to the control signal from the baseband signal generator that receives the output of the level detection unit. The invention to be controlled is described in Patent Document 2.

  In addition, the variable attenuation circuit controls the level of the transmission signal according to the control signal, the level detection circuit detects the level of the transmission signal, and the arithmetic circuit detects the difference between the output of the level detection circuit and the reference value of the reference value storage circuit, Patent Document 3 discloses an invention for determining and supplying a control signal to a variable attenuation circuit.

JP 2010-187274 A JP 2001-186209 A Japanese Patent Laid-Open No. 05-130015

  In the transmission apparatus related to the present invention, there are three factors that take time to operate. First, in the case of amplitude modulation, if an output level is calculated from the output signal of PWR DETECTOR 13, it must be integrated.

  Secondly, when the crest factor (crest factor) is large, the output signal of the PWR DETECTOR 13 is distorted, so that it is necessary to configure an LPF (Low Pass Filter). However, when LPF is inserted, it takes time to stabilize at the start of waveform input.

  The situation of the first and second problems is shown in FIG. FIG. 9 is a schematic diagram showing an example of a problem in the transmission apparatus related to the present invention. (A) shows that the output signal of PWR DETECTOR 13 is distorted when the feedback signal of the transmission signal is integrated, and (B) shows that when LPF is inserted, it takes time to stabilize at the start of waveform input. Yes.

  Third, since the difference between the transmission output setting at the start of transmission and the output level is large, the error is not reduced unless repeated feedback control is performed.

  On the other hand, in any of Patent Documents 1 to 3, a technique for canceling an amplitude modulation component from a quadrature modulation signal in a feedback loop and a transmission apparatus, which are unique to the present invention, are a configuration unit A and a configuration unit A that amplify an input signal. When the output signal of the configuration unit A is separated into the configuration unit B that performs feedback control, the configuration unit A is based on the output level of the configuration unit A and the gain of the input side variable amplification unit of the configuration unit B to which the output of the configuration unit A is input. No technique is described for calculating the initial value of the applied control voltage to the input side variable amplifying unit at the time of connection with B and B. Therefore, the invention described in Patent Documents 1 to 3 does not solve the problem of the present invention. Can not.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a transmission apparatus capable of performing high-speed level control that does not depend on a modulation scheme and a symbol rate, and a transmission level control method thereof.

  In order to solve the above-described problem, a transmission apparatus according to the present invention is a transmission apparatus that controls a transmission level of a quadrature modulation signal of a baseband signal using a feedback loop. The configuration when the amplitude modulation component is canceled from the quadrature modulation signal and the transmission apparatus is separated into the configuration unit A that amplifies the input signal and the configuration unit B that feedback-controls the output signal of the configuration unit A Based on the output level of the unit A and the gain of the input side variable amplification unit of the configuration unit B to which the output of the configuration unit A is input, the applied control voltage to the input side variable amplification unit when the configuration units A and B are connected An initial value is calculated.

  The transmission level control method according to the present invention is a transmission level control method for a transmission apparatus that controls the transmission level of a quadrature modulation signal of a baseband signal by using a feedback loop. Canceling an amplitude modulation component from the quadrature modulation signal and separating the transmission apparatus into a configuration unit A for amplifying an input signal and a configuration unit B for feedback-controlling the output signal of the configuration unit A, Based on the output level of the configuration unit A and the gain of the input side variable amplification unit of the configuration unit B to which the output of the configuration unit A is input, the applied control voltage to the input side variable amplification unit when the configuration units A and B are connected Including a transmission level control step of calculating an initial value of.

  A program according to the present invention is a program for causing an arithmetic processing unit to execute a transmission level control method of a transmission device that controls a transmission level of an orthogonal modulation signal of a baseband signal using a feedback loop. A configuration unit A that cancels an amplitude modulation component from the quadrature modulation signal in the feedback loop in some cases, and the transmission device amplifies an input signal and a configuration unit B that feedback-controls the output signal of the configuration unit A; When the component units A and B are connected, the input side is connected based on the output level of the component unit A and the gain of the input side variable amplification unit of the component unit B to which the output of the component unit A is input. Including a transmission level control step of calculating an initial value of an applied control voltage to the variable amplification unit And wherein the door.

  According to the present invention, it is possible to perform high-speed level control that does not depend on a modulation scheme and a symbol rate. That is, according to the present invention, since the transmission level can be controlled at high speed, it is possible to increase the communication capacity by using a portion that has not been used as a data area until now, and the modulation scheme and symbol rate can be increased. Since it does not depend on the circuit configuration, it is possible not to be affected by the addition / change of the modulation system.

It is a block diagram of 1st Embodiment of the transmitter which concerns on this invention. It is a schematic diagram which shows a mode that the amplitude signal of the signal input into PWR DETECTOR 13 is canceled. It is a flowchart which shows 1st operation | movement of the transmission level control method of the transmitter which concerns on this invention. It is a flowchart which shows the 2nd operation | movement of the transmission level control method of the transmitter which concerns on this invention. 6 is a schematic diagram illustrating an example of a relationship between an output signal of PA 6 and an output signal of PWR DETECTOR 13. FIG. It is a block diagram of 2nd Embodiment of the transmitter which concerns on this invention. It is a flowchart which shows the 3rd operation | movement of the transmission level control method of the transmitter which concerns on this invention. It is a block diagram of an example of the transmission apparatus relevant to this invention. It is a schematic diagram which shows an example of the problem in the transmission apparatus relevant to this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. First, a first embodiment of the present invention will be described. FIG. 1 is a configuration diagram of a first embodiment of a transmission apparatus according to the present invention.

  Referring to the figure, a transmitting apparatus according to the present invention includes a VGA (first variable amplifying unit) 5 that amplifies a quadrature modulation signal of a baseband signal with a gain corresponding to an applied control voltage, and power amplifies the output of VGA 5. And outputs a PA (power amplification unit) 6, the output of PA 6, a coupler (COUPLER) 7 that extracts a part of the output, and a voltage corresponding to the output power value of COUPLER 7 PWR DETECTOR (power detection unit) 13 is provided between COUPLER 7 and PWR DETECTOR 13 and applies the reverse phase of the amplitude component of the baseband signal to cancel the amplitude modulation component of the input signal of PWR DETECTOR 13 The control voltage applied to the VGA 5 is determined from the output voltage of the VGA (second variable amplifier) 14 and the PWR DETECTOR 13. A memory (first memory) 11 for storing the gain of the VGA 5 in the unit test of the subsequent structural unit B from the VGA 5 for generating the voltage, and a specification in the unit test of the structural unit A before the VGA 5 When a transmission operation is performed for the first time after the combination of the memory (second memory) 9 storing the output level to the VGA 5 at the time of level input and the constituent units A and B, application to the VGA 5 with reference to the memories 11 and 9 A calculator (calculation unit) 10 that calculates the initial value of the control voltage and updates the applied control voltage while updating the value of Memory 9 until the level control result reaches the final error value.

  Further, the application control voltage to the VGA 14 includes a DELAY (delay unit) 16 that delays the input baseband signal for a predetermined time, and a (√I2 + Q2) unit that calculates the amplitude component of the input baseband signal from the signal output from the DELAY 16 (Amplitude component calculation unit) 17 and (CW√I2 + Q2) unit (amplitude component holding unit) 20 that holds the amplitude component as a fixed value assuming that the quadrature modulation signal in the feedback loop is CW (Continuous Wave) Then, an ADDITION (adder) 18 that subtracts the amplitude component calculated by the (√I2 + Q2) unit 17 from a fixed value held by the (CW√I2 + Q2) unit 20, and an output signal of the ADDITION 18 (√I2 + Q2) unit 17 Multiplies a fixed coefficient for converting the amplitude component calculated by the VGA 14 into a gain slope. A coefficient multiplying portion) 21, and output a digital output signal Coefficient 21 from the portion configured to include a DAC 19 which outputs an analog voltage.

  Furthermore, DAC 1 that quadrature modulates the I and Q signals that are baseband signals, IF AMP 2 that amplifies the output of DAC 1, MIXER 3 that mixes the output of IF AMP 2 and the local signal, and MIXER 3 An RF AMP 4 for RF amplification of the output is included in the constituent unit A.

  Further, the configuration unit B includes a variable ATT (variable attenuator) 15 between the COUPLER 7 and the VGA 14, an ADC 12 between the PWR DETECTOR 13 and the Memory 11, and a DAC between the Memory 11 and the VGA 5. 8 is included.

  “In the case of amplitude modulation, if the output level is calculated using the output signal of the PWR DETECTOR 13, the output level must be integrated.” “If the crest factor is large, the output signal of the PWR DETECTOR 13 is distorted. In order to solve the problem that it takes time to stabilize at the start of waveform input when the LPF is inserted, the amplitude modulation of the input signal of the PWR DETECTOR 13 is canceled.

  In order to cancel this amplitude modulation, the opposite phase of the amplitude components of the baseband I and Q signals is added to the VGA 14 as a control voltage. In DELAY 16 of FIG. 1, the time from when baseband signals I and Q are input to DAC 1 to when they are input to PWR DETECTOR 13 is delayed.

  The (√I2 + Q2) unit 17 calculates the amplitude component of the baseband signal. The (CW√I2 + Q2) unit 20 holds the amplitude component when the signal input to the PWR DETECTOR 13 is CW as a fixed value. In ADDITION 18, ((CW√I2 + Q2) portion 20 fixed value) − (value calculated in (√I2 + Q2) portion 17) is calculated.

  The coefficient 21 multiplies a fixed coefficient for converting the output signal of the (√I2 + Q2) unit 17 into a gain gradient (dBm / V) of the VGA 14. Since the phase of the calculated control voltage and the input signal of the VGA 14 match by 180 degrees, the input signal including the amplitude component becomes a constant amplitude signal at the output.

  The output of the PWR DETECTOR 13 with respect to the constant amplitude signal input is distorted in the same manner as when the crest factor is large because of the fluctuation from the no-input state immediately after the input, but otherwise becomes a constant value. Assuming that the time until the distortion is stabilized is α, the sum of the result obtained by calculating the value obtained by the ADC 12 from the DAC 1 output by the Calculator 10 with the Calculator 10 and the time β until the DAC 8 reflects the output is the convergence time. It becomes.

  FIG. 2 is a schematic diagram showing how the amplitude signal of the signal input to the PWR DETECTOR 13 is canceled. Since the time for integrating the output signal of the PWR DETECTOR 13 performed in the related art of the present invention is eliminated, it is possible to shorten the time until the output level can be adjusted. In addition, since there is no distortion depending on the crest factor, there is no waiting time for an unusable time corresponding to the response time of the LPF. This convergence time α + β does not change for any modulation signal.

  Next, regarding the problem that “the difference between the transmission output setting at the start of transmission and the output level is large, the error will not be reduced unless repeated feedback control is performed”. The difference between the value and the value of the object to be converged has the following relationship.

  In other words, “difference at the time of comparison” is proportional to “target value and error after control”, and “target value and error after control” is proportional to “time until convergence (number of repetitions)”. is there.

  If the result of control by the initial value is as close as possible to the target value, the convergence time is also zero. In order to make this time as close as possible, Memory 11 and 9 are used. In Memory 11 and 9, test results are written at the time of unit unit testing of the constituent units A and B.

  Assume that the prescribed level of the constituent units A and B (between RF AMP 4 and VGA 5) is γ (dBm) aδ (dB). During the unit test of the constituent unit A, the value of the output level ε (dBm) when the baseband signals I and Q are input is stored in the Memory 9.

  During the unit test of the component unit B, the control voltage from the DAC 8 of the VGA 5 is set to a fixed value ζ (V), and the value of gain η (dB) when a signal of γ (dBm) as an input signal is input is Memory. 11 is stored. When the transmission operation is performed for the first time after combining the configuration units A and B, the gain of the VGA 5 is calculated from the ε and η of the memories 9 and 11, and the initial value of the DAC 8 is calculated.

Then, the following relational expression is established.
Transmission output setting (dBm)-ε-η = VGA 5 gain (dB)

  When the level control operation is performed in the transmission operation, the value of Memory 9 is updated until the result after control becomes the final error value (final value << standard value). By such an operation, the accuracy of the initial value is increased, and a value that does not require loop control is obtained. As a result, the time required for repetitive control becomes zero.

  Next, a transmission level control method in the transmission apparatus will be described. FIG. 3 is a flowchart showing a first operation of the transmission level control method of the transmission apparatus according to the present invention.

  The first variable amplifier 5 amplifies the quadrature modulation signal of the baseband signal with a gain corresponding to the applied control voltage (step S1). The power amplification unit 6 amplifies the output of the first variable amplification unit 5 and outputs it (step S2). The coupler 7 passes the output of the power amplifying unit 5 and extracts a part of the output (step S3). The power detection unit 13 outputs a voltage corresponding to the output power value from the coupler 7 (step S4).

  The second variable amplification unit 14 is provided between the coupler 7 and the power detection unit 13 and applies a reverse phase of the amplitude component of the baseband signal to cancel the amplitude modulation component of the input signal of the power detection unit 13. The control voltage is set (step S5). The first storage unit 11 generates the application control voltage for the first variable amplification unit 5 from the output voltage of the power detection unit 13, and the first storage unit 11 at the time of the unit test of the constituent unit B downstream from the first variable amplification unit 5. The gain of the variable amplification unit 5 is stored (step S6).

  The second storage unit 9 stores the output level to the first variable amplifying unit 5 when the specified level is input in the unit test of the component unit A preceding the first variable amplifying unit 5 (step S7). The calculation unit 10 calculates the initial value of the applied control voltage for the first variable amplification unit 5 with reference to the first and second storage units 11 and 9 when performing a transmission operation for the first time after the combination of the constituent units A and B. Then, the application control voltage is updated while updating the value of the second storage unit 9 until the level control result reaches the final error value (step S8).

  FIG. 4 is a flowchart showing a second operation of the transmission level control method of the transmission apparatus according to the present invention. The applied control voltage to the second variable amplification unit 14 is output from the following processing.

  The delay unit 16 delays the input baseband signal for a predetermined time (step S11). The amplitude component calculator 17 calculates the amplitude component of the input baseband signal from the signal output from the delay unit 16 (step S12). The amplitude component holding unit 20 holds the amplitude component as a fixed value when it is assumed that the quadrature modulation signal in the feedback loop is CW (Continuous Wave) (step S13).

  The adding unit 18 subtracts the amplitude component calculated by the amplitude component calculating unit 17 from the fixed value held by the amplitude component holding unit 20 (step S14). The coefficient multiplier 21 multiplies a fixed coefficient for converting the amplitude component calculated by the amplitude component calculator 17 into the gain gradient of the second variable amplifier 14 (step S15). The DA (Digital to Analog) converter 19 outputs the digital output signal of the coefficient multiplier 21 as an analog voltage (step S16).

  As described above, according to the first embodiment of the present invention, since the amplitude of the input signal of the PWR DETECTOR 13 is canceled, it is necessary to integrate the output signal of the PWR DETECTOR 13 in the case of amplitude modulation. And there is a significant effect that it is not necessary to put LPF on the output side of the PWR DETECTOR 13.

  Furthermore, since the output of the component unit A at the unit test and the gain of the component unit B when the gain of the VGA 5 at the unit test of the component unit B is set as a fixed gain are stored in the memories 9 and 11, Even if the gain of each part fluctuates due to fluctuations in temperature, power supply voltage, etc., the time required for loop control can be shortened, and the area usable for data communication can be increased. Further, even if the modulation method and the data rate are changed, the operation is possible without changing the circuit. Further, with the above method, even if the constituent unit fails and is replaced, it is possible to operate without compatibility without adjusting.

  Next, a second embodiment will be described. When level control is performed by the method shown in the first embodiment, when the output signal of PA 6 is distorted after convergence, a waveform as shown in FIG. 5 is obtained as the output signal of PWR DETECTOR 13. FIG. 5 is a schematic diagram showing an example of the relationship between the output signal of PA 6 and the output signal of PWR DETECTOR 13.

  A method of performing distortion compensation using this result will be described as a second embodiment. FIG. 6 is a block diagram of a second embodiment of the transmission apparatus according to the present invention. In the second embodiment, the following configuration is added to the configuration of the first embodiment (see FIG. 1).

  Referring to FIG. 6, the transmission apparatus latches the input baseband signal, and when distortion is detected by the Calculator 10, the input baseband data and the information on the degree of distortion are written into the Memory 9 (first). A latch unit 22, a COMPARE (comparing unit) 23 that determines whether or not distortion has occurred in the past in the input baseband signal by comparing with data stored in the memory 9, and a past in the input baseband signal. If the input baseband signal is rewritten by the ADJ (adjusting unit) 24 that lowers the scalar level of the input baseband signal output from the COMPARE 23 and the ADJ 24, the LATCH 22 causes the distortion. LATCH (second latch unit) that detects and controls not to perform a write operation to Memory 9 And a 25, LATCH22 and 25 undergo a degree of information distortion from Calcculator 10, writes the information of the degree of distortion of the baseband signal adjusted to the original baseband signal to Memory 9.

  The LATCH 22 latches the baseband signals I and Q, and when distortion is detected by the CALUCLATOR 10, the I and Q data and the degree of distortion are written in the Memory 9. The COMPARE 23 compares whether or not distortion has occurred in the past in the input baseband signals I and Q with the data stored in the Memory 9.

  If there is distortion, the ADJ 24 lowers the scalar levels of the baseband signals I and Q. The LATCH 25 controls the LATCH 22 so as not to detect the distortion and perform the writing operation to the Memory 9 when the baseband signals I and Q are rewritten by the ADJ 24. Further, in response to the degree of distortion from CALUCLATOR 10, the baseband signals I and Q adjusted with the original baseband signals I and Q and the degree of distortion are written in Memory 9.

  When baseband signals I and Q having the same contents are input again, adjustment and writing operations are further performed according to the degree of distortion after adjustment. With the above processing, an optimum distortion compensation circuit can be configured for each component unit. Since the management number from the memory 11 is stored in the memory 9, all the memory portions in the combined state are erased when they are replaced.

  FIG. 7 is a flowchart showing a third operation of the transmission level control method of the transmission apparatus according to the present invention.

  The first latch unit 22 latches the input baseband signal, and when the calculation unit 10 detects distortion, the input baseband data and information on the degree of distortion are written in the second storage unit 9 (step S21). ). The comparison unit 23 determines whether or not distortion has occurred in the past in the input baseband signal by comparing with the data stored in the second storage unit 9 (step S22). When the distortion has occurred in the input baseband signal in the past, the adjustment unit 24 decreases the scalar level of the input baseband signal output from the comparison unit 23 (step S23).

  When the second latch unit 25 rewrites the input baseband signal in the adjustment unit 24, the first latch unit 22 detects the distortion and performs control so as not to perform the write operation to the second storage unit 9 (step S24). ). The first and second latch units 22 and 25 receive information on the degree of distortion from the calculation unit 10 and write the information on the degree of distortion of the baseband signal adjusted with the original baseband signal into the second storage unit 9 ( Step S25).

  As described above, according to the second embodiment of the present invention, an optimal distortion compensation circuit can be configured by providing the first and second latch units 22 and 25 that latch the input baseband signal. It becomes.

  Next, a third embodiment of the present invention will be described. The transmitting apparatus according to the present invention (see FIGS. 1 and 6) includes at least a first variable amplification unit 5, a power amplification unit 6, a coupler 7, a power detection unit 13, a second variable amplification unit 14, and a first storage unit 11. , Second storage unit 9, calculation unit 10, delay unit 16, amplitude component calculation unit 17, amplitude component holding unit 20, addition unit 18, coefficient multiplication unit 21, DA (Digital to Analog) conversion unit 19, first latch unit 22, an arithmetic processor (not shown) (FPGA (Field-Programmable Gate Way)), a CPU (Central Processing Unit), and the like that control the comparator 23, the adjuster 24, and the second latch unit 25 are provided.

  The transmission apparatus further includes a program storage unit (not shown) that stores a program of the transmission level control method shown in the flowcharts of FIGS. The arithmetic processing unit reads these programs from the program storage unit and controls each unit according to the program. Since the contents of the control have already been described, the description thereof is omitted here.

  As described above, according to the third embodiment of the present invention, a program capable of performing high-speed level control independent of the modulation scheme and symbol rate is obtained.

1 DAC
2 IF AMP
3 MIXER
4 RF AMP
5 VGA (first variable amplifier)
6 PA (Power Amplifier)
7 Coupler
8 DAC
9 Memory (second memory)
10 Calculator
11 Memory (first memory)
12 ADC
13 PWR DETECTOR (Power detector)
14 VGA (second variable amplifier)
15 Variable ATT (variable attenuator)
16 DELAY (delay unit)
17 (√I2 + Q2) part (amplitude component calculation part)
18 ADDITION (adder)
19 DAC
20 (CW√I2 + Q2) part (amplitude component holding part)
21 Coefficient (coefficient multiplier)
22 LATCH (first latch part)
23 COMPARE (Comparator)
24 ADJ (Adjustment Unit)
25 LATCH (second latch part)

Claims (9)

Baseband I, the transmission level of the transmission signal orthogonally modulated Q signals, I transmission apparatus der controlled using a feedback loop,
Configuration unit A for amplifying the input signal;
A configuration unit B to which an output signal of the configuration unit A is input;
The configuration unit B includes an input side variable amplification unit to which the output signal of the configuration unit A is input ,
The feedback loop is for generating an application control voltage for the input side variable amplifying unit using a part of a signal output from the input side variable amplifying unit and transmitted from the configuration unit B,
Before SL to cancel the amplitude modulation component from the quadrature modulated signal in the feedback loop, or One prior Symbol defined at a single test component units A baseband I, Q signals input at the output level and the input based the applied control voltage side variable amplifier gain during a single test and a known value performed by entering the specified level, the initial value of the applied control voltage to the input-side variable amplification portion during construction units a and B connected A transmission apparatus characterized by calculating The input-side variable amplifier is a first variable amplifier for amplifying a gain corresponding baseband I, quadrature modulated signal Q signals to the applied control voltage, furthermore,
A power amplifying unit that amplifies and outputs the output of the first variable amplifying unit;
A coupler that passes the output of the power amplifier and extracts a part of the output;
A power detector that outputs a voltage corresponding to the output power value of the coupler;
An application control voltage is provided between the coupler and the power detection unit, and an opposite phase of the amplitude components of the baseband I and Q signals for canceling the amplitude modulation component of the input signal of the power detection unit. A second variable amplification unit;
The second memory for storing the output level at the time of the unit test of the component unit A and the first memory for storing the gain at the time of the unit test by the known applied control voltage of the component unit B are used immediately after starting transmission. An initial value of the application control voltage of the first variable amplification unit for outputting a level close to the transmission signal level is calculated, and the application control voltage of the first variable amplification unit is updated until the level control result reaches a final error value. The transmission device according to claim 1, further comprising: a calculation unit that performs the operation. The applied control voltage to the second variable amplification unit is:
A delay unit for delaying the input baseband I and Q signals for a predetermined time;
An amplitude component calculator that calculates the amplitude components of the input baseband I and Q signals from the signal output from the delay unit;
And the amplitude component holding section for holding the amplitude component when the quadrature modulated signal in the feedback loop is assumed to have been CW (Continuous Wave) as a fixed value,
An adding unit for subtracting the amplitude component calculated by the amplitude component calculating unit from a fixed value held by the amplitude component holding unit;
A coefficient multiplier for multiplying a fixed coefficient for converting the amplitude component calculated by the amplitude component calculator into a gain gradient of the second variable amplifier;
3. The transmission apparatus according to claim 2, wherein the transmission apparatus outputs the digital output signal of the coefficient multiplication unit from a part including a DA (Digital to Analog) conversion unit that outputs an analog voltage. A first latch unit that latches input baseband I and Q signals and writes the input baseband data and information on the degree of distortion in a second memory when distortion is detected by the calculation unit;
And determining comparing unit compares the data which the input baseband I, also whether distortion in the past Q signal is generated is stored in the second memory,
An adjustment unit that lowers the scalar level of the input baseband I and Q signals output from the comparison unit when distortion has occurred in the input baseband I and Q signals in the past;
A second latch unit that controls the first latch unit to detect a distortion and not to perform a write operation to the second memory when the adjustment unit rewrites the input baseband I and Q signals. ,
The first and second latch units receive distortion level information from the calculation unit, and write information about the distortion level of the baseband signal adjusted with the original baseband signal into the second memory. The transmission device according to claim 2 or 3. The transmission level of the quadrature modulated signal of the baseband signal, I transmission level control method der of the transmitting apparatus controlled using a feedback loop,
The transmitter is
Configuration unit A for amplifying the input signal;
A configuration unit B to which an output signal of the configuration unit A is input;
The configuration unit B includes an input side variable amplification unit to which the output signal of the configuration unit A is input ,
The feedback loop is for generating an application control voltage for the input side variable amplifying unit using a part of a signal output from the input side variable amplifying unit and transmitted from the configuration unit B,
Cancel the previous SL said quadrature amplitude modulated component from the modulation signal in the feedback loop, defined baseband I, output level when Q signals input at the time of a single test or One prior Symbol arrangement unit A and the input side variable based the applied control voltage of the amplifier to the gain at the time of a single test to a known value performed by entering the specified level, calculating the initial value of the applied control voltage to the input-side variable amplification portion during construction units a and B connected The transmission level control method characterized by including the transmission level control step to perform. A first variable amplification step for amplifying the quadrature modulation signal of the baseband signal with a gain corresponding to the applied control voltage;
A power amplification step of amplifying and outputting the output of the first variable amplification step;
An extraction step of passing the output of the power amplification step and extracting a part of the output;
A power detection step of outputting a voltage corresponding to the output power value of the extraction step;
A second phase which is provided between the extraction step and the power detection step and uses an opposite phase of the amplitude component of the baseband signal to cancel the amplitude modulation component of the input signal of the power detection step. A variable amplification step;
The gain of the first variable amplification step in the unit test of the constituent unit B subsequent to the first variable amplification step for generating the application control voltage for the first variable amplification step from the output voltage of the power detection step. A first storage step for storing;
A second storage step for storing an output level to the first variable amplification step at the time of inputting a specified level in the unit test of the constituent unit A preceding the first variable amplification step;
When the transmission operation is performed for the first time after the combination of the constituent units A and B, the initial value of the applied control voltage for the first variable amplification step is calculated with reference to the first and second storage steps, and the level control result is 6. The transmission level control method according to claim 5, further comprising a calculation step of updating the applied control voltage while updating the value of the second storage step until a final error value is reached. The applied control voltage to the second variable amplification step is
A delay step for delaying the input baseband signal for a predetermined time;
An amplitude component calculating step of calculating an amplitude component of the input baseband signal from the signal output from the delay step;
An amplitude component holding step for holding the amplitude component as a fixed value when it is assumed that the quadrature modulation signal in the feedback loop is CW (Continuous Wave);
An addition step of subtracting the amplitude component calculated by the amplitude component calculation step from a fixed value held by the amplitude component holding step;
A coefficient multiplication step of multiplying a fixed coefficient for converting the amplitude component calculated by the amplitude component calculation step into a gain gradient of the second variable amplification step;
7. The transmission level control method according to claim 6, wherein the transmission level control method includes a DA (Digital to Analog) conversion step of outputting a digital output signal of the coefficient multiplication step as an analog voltage. A first latch step for latching an input baseband signal and writing the input baseband data and information on the degree of distortion in the second storage step when distortion is detected in the calculating step;
A comparison step of determining whether or not distortion has occurred in the past in the input baseband signal by comparing with data stored in the second storage step;
When distortion has occurred in the input baseband signal in the past, an adjustment step of lowering the scalar level of the input baseband signal output from the comparison step;
A second latch step for controlling the first latch step so as not to perform a write operation in the second storage step when the input baseband signal is rewritten in the adjustment step;
The first and second latch steps receive distortion degree information from the calculation step, and write information of the distortion degree of the baseband signal adjusted with the original baseband signal into the second storage step. The transmission level control method according to claim 6 or 7. The transmission level of the quadrature modulated signal of the baseband signal, program der for executing the transmission level control method of the transmitting apparatus controlled using a feedback loop to the arithmetic processing unit,
The transmitter is
Configuration unit A for amplifying the input signal;
A configuration unit B to which an output signal of the configuration unit A is input;
The configuration unit B includes an input side variable amplification unit to which the output signal of the configuration unit A is input ,
The feedback loop is for generating an application control voltage for the input side variable amplifying unit using a part of a signal output from the input side variable amplifying unit and transmitted from the configuration unit B,
Cancel the previous SL said quadrature amplitude modulated component from the modulation signal in the feedback loop, defined baseband I, output level when Q signals input at the time of a single test or One prior Symbol arrangement unit A and the input side variable based the applied control voltage of the amplifier to the gain at the time of a single test to a known value performed by entering the specified level, calculating the initial value of the applied control voltage to the input-side variable amplification portion during construction units a and B connected A program comprising a transmission level control step.

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