WO2004059885A1 - 無線通信装置 - Google Patents
無線通信装置 Download PDFInfo
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- WO2004059885A1 WO2004059885A1 PCT/JP2003/017051 JP0317051W WO2004059885A1 WO 2004059885 A1 WO2004059885 A1 WO 2004059885A1 JP 0317051 W JP0317051 W JP 0317051W WO 2004059885 A1 WO2004059885 A1 WO 2004059885A1
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- transmission power
- error
- gain control
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- 238000004891 communication Methods 0.000 title claims abstract description 62
- 230000005540 biological transmission Effects 0.000 claims abstract description 379
- 238000001514 detection method Methods 0.000 claims abstract description 68
- 238000012937 correction Methods 0.000 claims description 110
- 230000010354 integration Effects 0.000 claims description 32
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 230000002265 prevention Effects 0.000 abstract 1
- 238000012545 processing Methods 0.000 description 16
- 238000010586 diagram Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010295 mobile communication Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000001151 other effect Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
Definitions
- the present invention relates to a wireless communication device used in a mobile communication system for performing mobile communication using a mobile phone or the like, and in particular, controls transmission power of a transmission system by a transmission power control bit received from a partner station.
- a wireless communication device used in a mobile communication system for performing mobile communication using a mobile phone or the like, and in particular, controls transmission power of a transmission system by a transmission power control bit received from a partner station.
- the transmission power is controlled according to the distance between the base station and the mobile station, so that the power of the signal received at the base station is kept constant, and the communication channel
- a transmission power control technology that suppresses interference and improves frequency use efficiency.
- CDMA Code Division Multiple Access
- the same frequency and the same time are shared between users.
- the transmission power of the mobile station is the same, the near-far problem that the signal from the nearer station becomes stronger and the signal from the farther station cannot be separated. Will happen.
- the CDMA system requires a wide dynamic range and high linearity.
- the wide band CDMA system (such as W—CDMA) requires high transmission power accuracy at high power.
- a conventional wireless communication device has an antenna 1 for transmitting / receiving a radio signal, and a transmission / reception separator 2 for separating a transmission signal and a reception signal.
- a radio equipped with a high-frequency amplifier, local oscillator, IF signal amplifier, etc. that amplifies and outputs an IF signal whose frequency has been converted to the IF (intermediate frequency) band. It includes a receiving unit 3, a demodulator 4 for converting a received signal into a baseband signal, and a baseband signal processing unit 5 for performing signal processing and decoding of the received baseband signal.
- the baseband signal processing unit 5 that performs signal processing and coding of a baseband signal to be transmitted, a modulator 13 that modulates a transmission signal and outputs an IF signal, and a power of the transmission signal. It consists of a radio transmitter 14 that performs amplification and frequency conversion to RF (radio frequency) band. Further, the wireless transmission section 14 has a variable gain amplifier 15.
- the wireless communication apparatus further includes a baseband signal processing unit 5 as a transmission power control system, a transmission power setting unit 6 that receives the transmission power control bit output from the baseband signal processing unit 5 and sets transmission power. And a power value Z gain control signal conversion unit 8 for converting the transmission power set value from the transmission power setting unit 6 into a gain control signal.
- the wireless communication device having the transmission power correction function includes a transmission power detection unit 9 that detects a transmission power radiated from the antenna 1 and outputs a detection signal as a transmission power adjustment system, An error calculator 10 compares the gain control signal with the gain control signal, calculates an error between them, and outputs an error signal, and an adder 12 adds the error signal and the gain control signal.
- the transmission power control bits are extracted based on the baseband signal obtained by demodulating the received signal, the transmission power setting value is determined based on the transmission power control bits, and this is set as the gain control signal A. Convert.
- the transmission power output value radiated from the antenna 1 is detected, and based on the detection signal corresponding to the transmission power output value and the gain control signal A, the transmission power indicated by the transmission power control bit is actually obtained.
- An error with the transmitted transmission power is calculated as an error signal.
- This error signal is added to the gain control signal A to generate a gain control signal B.
- the gain control signal B controls the transmission power gain in a closed loop so that the error signal becomes zero. The transmission power accuracy has been improved.
- the transmission power set value is compared with the transmission power output value, and the feedback control of the transmission power is performed by adding the calculated error signal to the control signal.
- the detection characteristics of the detection diode of the transmission power detector 9 are such that the change in the detection voltage is small in the range where the transmission power is small, so the wide dynamic range required by the CDMA method is used. It is difficult to realize a transmission power detection unit that can handle this. For this reason, control to operate the transmission power control only at the time of high power, which requires high transmission power accuracy, can be considered.
- An object of the present invention is to provide a method in which when closed-loop control is performed over a threshold that is a detection limit of transmission power, the transmission power exceeds the threshold.
- An object of the present invention is to provide a wireless communication apparatus capable of performing a smooth and highly accurate transmission power control by suppressing a sudden gain change even when the transmission power changes.
- a wireless communication apparatus of the present invention sets transmission power according to a transmission power control bit transmitted from a partner station to the own station, and changes a transmission system so that the set transmission power is obtained.
- a wireless communication device that controls the gain of a gain amplifier, a transmission power detection unit that detects transmission power of the own station, and an error calculation unit that calculates an error between the detected transmission power of the local station and the set transmission power.
- the transmission power is controlled across a threshold which is a transmission power detection limit of the transmission power detection unit, the obtained error does not change significantly when the transmission power changes across the threshold.
- a buffer means.
- the transmission power of the own station is detected, and an error between the detected transmission power of the own station and the transmission power set according to the transmission power control bit transmitted from the partner station to the own station is obtained.
- the buffering means prevents the obtained error from changing significantly when the transmission power changes across the threshold when the transmission power is controlled across the threshold which is the detection limit of the transmission power. .
- the buffer means in the first embodiment It corresponds to the transmission power determination unit 7 and the error integration unit 11, and in the second to fourth embodiments, corresponds to the transmission power determination unit 7, the switch unit 17, the error determination unit 18 and the integration unit 19.
- the wireless communication apparatus of the present invention sets transmission power according to a transmission power control bit transmitted from a partner station to the local station, and adjusts a gain of a variable gain amplifier of a transmission system so that the transmission power becomes the set transmission power.
- a wireless communication apparatus for controlling, a power value for converting the set transmission power into a gain control signal for controlling the gain of the variable gain amplifier, a Z gain control signal conversion unit, and a transmission power for detecting a transmission power of the own station.
- An error integrator that can switch between integrating or not integrating the calculated error according to a determination result of the magnitude of the transmission power with respect to a threshold value; and the integration result and the gain control signal. Adding, by the resulting summation signal, characterized by comprising, an addition unit for controlling a gain of the variable gain amplifier.
- the transmission power set according to the transmission power control bit transmitted from the partner station to the own station is converted into a gain control signal for controlling the gain of the variable gain amplifier.
- the transmission power of the own station is detected, and the detected transmission power is compared with the gain control signal to calculate an error (error signal) between the two.
- the magnitude of the set transmission power with respect to the threshold value is determined, and whether to integrate or not integrate the error signal is switched according to the determination result. That is, when the set transmission power is larger than the threshold value, the error signal is integrated, the integration result is added to the gain control signal, and the gain of the variable gain amplifier is controlled by the obtained addition signal.
- closed loop transmission power control is performed.
- the wireless communication apparatus of the present invention sets transmission power according to a transmission power control bit transmitted from a partner station to the local station, and adjusts a gain of a variable gain amplifier of a transmission system so that the transmission power becomes the set transmission power.
- a transmission power detection unit that detects transmission power of the own station, an error calculation unit that calculates an error by comparing the detected transmission power detection value with the set transmission power,
- a transmission power determining unit that determines the magnitude of the set transmission power with respect to a threshold value; and a magnitude determination result of the calculated error and one of a gain control correction value, which will be described later, with respect to the set transmission power threshold.
- a switch unit for selecting and outputting, an error determining unit for determining whether an input signal from the switch unit is within an allowable range, and outputting a correction value corresponding to the determination result, and integrating the output correction value.
- An integration unit that outputs the integration result as a gain control correction value; an addition unit that adds the set transmission power and the gain control correction value; and a control unit that controls the gain of the variable gain amplifier based on the addition result.
- a power value / gain control signal conversion unit that converts the signal into a gain control signal and outputs it to the variable gain amplifier.
- the transmission power of the own station is detected, and the detected transmission power detection value is compared with the set transmission power according to the transmission power control bit transmitted from the partner station to the own station.
- To calculate the error The magnitude of the set transmission power with respect to the threshold is determined, and one of the calculated error and the gain control correction value is selected based on the magnitude of the magnitude of the transmission power with respect to the threshold, and the selected signal is permitted. Judge whether it is within the range, and output the correction value corresponding to the judgment result.
- This output correction value is integrated to obtain a gain control correction value, the gain control correction value is added to the set transmission power, and the addition result is used to control the gain of the variable gain amplifier.
- the signal is converted into a control signal and output to the variable gain amplifier to control transmission power. That is, when the set transmission power is larger than the threshold value, the calculated error signal is integrated, the integration result is added to the set transmission power, and the variable gain amplifier is obtained by the obtained addition signal. ,
- the closed loop transmission power control is performed.
- the wireless communication apparatus of the present invention sets transmission power according to a transmission power control bit transmitted from a partner station to the local station, and adjusts a gain of a variable gain amplifier of a transmission system so that the transmission power becomes the set transmission power.
- a transmission power detection unit that detects transmission power of the own station, an error calculation unit that calculates an error by comparing the detected transmission power detection value with the set transmission power,
- a transmission power determining unit that determines the magnitude of the set transmission power with respect to a threshold value; and a magnitude determination result of the calculated error and one of a gain control correction value, which will be described later, with respect to the set transmission power threshold.
- a switch unit for selecting and outputting the input signal from the switch unit, an error determining unit for determining whether an input signal from the switch unit is within an allowable range, and outputting a correction value corresponding to the determination result;
- An integration unit that integrates the correction value obtained and outputs the gain control correction value; and a first power value Z that converts the gain control correction value into a gain control correction signal that controls the gain of the variable gain amplifier.
- a gain control signal conversion unit, a second power value conversion unit that converts the set transmission power into a gain control signal that controls the gain of the variable gain amplifier, the gain control signal and the gain And an adder for adding the control correction signal and controlling the gain of the variable gain amplifier based on the obtained addition signal.
- the transmission power of the own station is detected, and the detected transmission power detection value is compared with the set transmission power according to the transmission power control bit transmitted from the partner station to the own station.
- To calculate the error The magnitude of the set transmission power with respect to the threshold is determined, and one of the calculated error and the gain control correction value is selected based on the magnitude of the magnitude of the transmission power with respect to the threshold. Is determined, and a correction value corresponding to the determination result is output.
- the output correction values are integrated to obtain a gain control correction value, and the gain control correction value is converted into a gain control correction signal for controlling the gain of the variable gain amplifier.
- the set transmission power is converted into a gain control signal for controlling the gain of the variable gain amplifier, the gain control signal and the gain control correction signal are added, and the variable gain is obtained by the obtained addition signal.
- the transmission power is controlled by controlling the gain of the gain amplifier. That is, if the set transmission power is greater than the threshold, the calculated error signal is integrated, the result of the integration is added to the set transmission power, and the variable gain is obtained by the obtained addition signal. Closed loop transmission power control is performed by controlling the gain of the amplifier.
- the wireless communication apparatus of the present invention sets transmission power according to a transmission power control bit transmitted from a partner station to the local station, and adjusts a gain of a variable gain amplifier of a transmission system so that the transmission power becomes the set transmission power.
- a transmission power detection unit that detects transmission power of the own station, an error calculation unit that calculates an error by comparing the detected transmission power detection value with the set transmission power,
- a transmission power determining unit that determines the magnitude of the set transmission power with respect to a threshold value; and a magnitude determination result of the calculated error and one of a gain control correction value, which will be described later, with respect to the set transmission power threshold.
- a switch unit for selecting and outputting the input signal from the switch unit, and determining whether an input signal from the switch unit is within an allowable range.
- An error determining unit that outputs a correction value corresponding to the determination result, an integrating unit that integrates the output correction value and outputs the gain control correction value,
- An addition unit for adding a gain control correction value; a first and a second power value for converting the addition result into a gain control signal for controlling a gain of the variable gain amplifier; a gain control signal conversion unit;
- a corrected set value determination unit that determines whether the addition result is converted to a gain control signal by the first or second power value Z gain control signal conversion unit according to the magnitude of a transmission power level determination threshold. And characterized in that:
- the transmission power of the own station is detected, and the detected transmission power detection value is compared with the set transmission power according to the transmission power control bit transmitted from the partner station to the own station.
- To calculate the error The magnitude of the set transmission power with respect to the threshold is determined, and one of the calculated error and the gain control correction value is selected based on the magnitude of the magnitude of the transmission power with respect to the threshold, and the selected signal is permitted. Judge whether it is within the range, and output the correction value corresponding to the judgment result.
- the output correction value is integrated to obtain a gain control correction value, and the gain control correction value and the set transmission power are added, and this addition is performed according to the magnitude of the set transmission power with respect to the level determination threshold.
- the result is converted into a gain control signal for controlling the gain of the variable gain amplifier by one of the first and second power value gain control signal converters, and output to the variable gain amplifier to transmit power.
- Control is performed. That is, when the set transmission power is larger than the threshold, the calculated error signal is integrated, the integration result is added to the transmission power set above, and the variable gain amplifier is obtained by the obtained addition signal.
- the closed loop transmission power control is performed by controlling the gain of the control signal.
- the wireless communication apparatus is characterized in that on / off control of the transmission power detection unit or the error calculation unit is performed based on a determination result of the transmission power determination unit with respect to the threshold value of the transmission power.
- the transmission power detection unit or the error calculation unit is turned off.
- FIG. 1 is a block diagram showing a configuration example of a wireless communication device according to the first embodiment of the present invention
- FIG. 2 is a timing chart showing the transmission power control operation of the wireless communication device shown in FIG.
- FIG. 3 is a block diagram illustrating a configuration example of a wireless communication device according to a second embodiment of the present invention.
- FIG. 4 is a timing chart showing the transmission power control operation of the wireless communication device shown in FIG.
- FIG. 5 is a block diagram illustrating a configuration example of a wireless communication device according to the third embodiment of the present invention.
- FIG. 6 is a block diagram showing a configuration example of a wireless communication device according to a fourth embodiment of the present invention.
- FIG. 7 is a block diagram showing a configuration example of a conventional wireless communication device.
- FIG. 8 is a characteristic diagram showing detection characteristics of a conventional transmission power detection unit.
- 1 is an antenna
- 2 is a transmission / reception separator
- 3 is a radio reception unit
- 4 is a demodulator
- 5 is a baseband signal processing unit
- 6 is a transmission power setting unit
- 7 is a transmission power judgment unit.
- 8, 8a, 8b, 8c, and 8d are power value Z gain control signal converters
- 9 is a transmission power detector
- 10 is an error calculator
- 11 is an error integrator
- 12 is an adder.
- 13 is a modulator
- 14 is a wireless transmitter
- 15 is a variable gain amplifier
- 16 is a detection signal power value converter
- 17 is a switch
- 18 is an error determiner
- 19 is an accumulator.
- Reference numerals 32 denote set value determination units after correction.
- FIG. 1 is a block diagram showing a configuration example of the wireless communication device according to the first embodiment of the present invention.
- the wireless communication device has an antenna 1 for transmitting and receiving a radio signal, and a transmission / reception separator 2 for separating a transmission signal and a reception signal.
- a radio receiving unit 3 including a high frequency amplifying circuit for amplifying a received signal and outputting an IF signal whose frequency is converted into an IF (intermediate frequency) band, a local oscillation circuit, an IF signal amplifying circuit, Signal A demodulator 4 for converting the received baseband signal and a baseband signal processing unit 5 for performing signal processing and decoding of the received baseband signal.
- a baseband signal processing unit (also used as a reception system) 5 that performs signal processing and encoding of a baseband signal to be transmitted, and a modulator 13 that modulates a transmission signal and outputs an IF signal 13
- a radio transmission unit 14 that performs power conversion of a transmission signal and frequency conversion to an RF (radio frequency) band.
- the radio transmission section 14 has a variable gain amplifier 15.
- the wireless communication apparatus of the present embodiment includes a baseband signal processing unit 5 as a transmission power control system, and a transmission power setting unit 6 that receives the transmission power control bit output from the baseband signal processing unit 5 and sets the transmission power. And a power value / gain control signal conversion unit 8 that converts the power set value 25 from the transmission power setting unit 6 into a gain control signal A 23.
- the wireless communication apparatus of the present example has a transmission power correction function, and as a transmission power adjustment system, detects a transmission power radiated from the antenna 1 and outputs a corresponding detection signal 20.
- Error detection unit 10 that compares the detection signal 20 with the gain control signal A 23 to calculate the error between the two, and outputs the obtained error signal 21, and the threshold of the transmission power setting value 25
- a transmission power determination unit 7 that determines the magnitude relationship and outputs an operation control signal 22 corresponding to the determination result, and an error signal 21 as an input signal, and no input signal is input by the operation control signal 22 (open ) Or input (short circuit).
- an input signal is input, it is integrated to generate and output a gain control correction signal 32, or the accumulated integrated signal is used as a gain control correction signal.
- Error integration unit 1 1 output as 3 2 And an adding section 1 2 you add the emission control correction signal 3 2 and a gain control signal A 2 3.
- a signal transmitted from a base station is received by an antenna 1, and the received signal is input to a radio reception unit 3 via a transmission / reception separator 2.
- the received signal input to the wireless receiving unit 3 is frequency-converted into an IF band, converted to a baseband signal by the demodulation unit 4, and then input to the base-span signal processing unit 5.
- the baseband signal processing unit 5 extracts a transmission power control bit based on the baseband signal.
- the transmission power setting unit 6 receives the transmission power control bit from the baseband signal processing unit 5 and outputs the corresponding transmission power setting value 25 to the transmission power determination unit 7 and the power value gain control signal conversion unit 8,
- the transmission power set value 25 is converted into a gain control signal A 23 by the power value Z gain control signal converter 8. Further, the transmission signal is modulated by the modulator 13 into an IF signal, frequency-converted and amplified into an RF band by the radio transmission section 14, and then transmitted from the antenna 1 via the transmission / reception separator 2.
- the transmission power is detected by the transmission power detection unit 9 and input to the error calculation unit 10 as a detection signal 20.
- the error calculator 10 calculates the error of the transmission power from the set transmission power based on the input detection signal 20 and the gain control voltage A 23, and outputs the error signal 21.
- the transmission power determination unit 7 determines the magnitude of the transmission power set value 25 with respect to the threshold value, and outputs the operation control signal 22 based on the determination result to the error integration unit 11.
- the error integrator 11 inputs the input signal to the error integrator 11 (short-circuits) according to the operation control signal 22 when the transmission power set value 25 is equal to or larger than the threshold as shown in FIG. Is integrated (APC control (transmission power control by closed loop) ON). If the signal is below the threshold value, the input of the input signal is not input (opened) to the error integrator 11 (APC control OFF).
- the integrated value that changes gradually is output to the adder 12 as a gain control correction signal 31 that becomes zero.
- FIG. 2C shows the error signal 21 output from the error calculator 10 at this time
- FIG. 2D shows the gain correction output from the error integrator 11 at this time.
- the control signal 31 is shown.
- the gain correction control signal 31 changes gradually and does not change rapidly. Therefore, the gain control signal A 23 output from the power value / gain control signal converter 8 and the gain control signal B 24 output from the adder 12 at this time are shown in FIG. 2 (b). It becomes such a relationship.
- the gain control correction signal 31 and the gain control signal A 23 are added by the adder 23 and output to the gain control terminal of the variable gain amplifier 15 of the wireless transmitter 14 as a gain control signal B 24. .
- the gain of the variable gain amplifier 15 is controlled by the gain control signal B 24 so that the error signal 21 becomes zero.
- the feedback control of the transmission power is performed so that the transmission power output from the transmitter becomes the value set by the transmission power setting value.
- FIG. 3 is a block diagram showing a configuration example of the wireless communication device according to the second embodiment of the present invention.
- the wireless communication apparatus of the present embodiment assumes digital transmission power feedback control, whereas the first embodiment mainly assumes analog transmission power feedback control. The difference is only the feedback control regarding the gain control signal output to the variable gain amplifier 15, and the other configurations and operations are the same as in the first embodiment.
- the transmission power adjustment system detects transmission power radiated from antenna 1 and outputs detection signal 20, and converts detection signal 20 to transmission power detection value 26.
- Detected signal that is output as a result Power value converter 16 compares transmission power detection value 26 with transmission power setting value 25 to calculate the error between the two, and calculates calculated error value 27 as switch 17
- the error calculation unit 10, the error value 27, and the gain control correction value 29 are output as input signals, and the operation control signal 22 switches which of these input signals is output to the error determination unit 18.
- the magnitude of the threshold value of the value 25 is determined, and the operation control signal 22 is determined based on the determination result.
- the transmission power determination unit 7 output to the switch unit 17 and the input correction value 28 are integrated to generate a gain control correction value 29, and this is added to the addition unit 12 and the switch unit 17.
- Integrator 1 9 to output and set transmission power 2 5 Is added to the gain control correction value 29 to obtain the set value 30 after the transmission power correction, and this is used as the power value.
- the addition unit 12 that outputs the value to the Z gain control signal conversion unit 8, and the input set value after the transmission power correction. Power value / gain control signal converter that converts 30 to gain control signal B 24
- the transmission power is detected by the transmission power detector 9 and a detection signal 20 is output.
- the detection signal 20 is converted to a transmission power detection value 26 by the detection signal Z power value conversion unit 16 and input to the error detection unit 10.
- Error detection section 10 calculates an error between transmission power detection value 26 and transmission power set value 25, and outputs error value 27 to switch section 17.
- the switch unit 17 receives the error control value 27 and the gain control correction value 29 as input signals, receives the operation control signal 22 from the transmission power determination unit 7, and when the transmission power setting value 25 is equal to or greater than the threshold value. If the error value 27 is equal to or smaller than the threshold value, the gain control correction value 29 is output to the error determination unit 18.
- the error judgment section 18 judges the input value from the switch section 17 and outputs a correction value 28 of the opposite polarity to the input value when the input value is outside the allowable error range, and when the input value is outside the allowable error range. Will output 0.
- the adder 1 and 2 add the gain control correction value 29 output from the accumulator 19 and the transmit power set value 25 to output the transmit power corrected set value 30 to the power value gain control signal converter 8 I do.
- the power value / gain control signal converter 8 converts the set value 30 after transmission power correction into a gain control signal B 24, thereby controlling the variable gain amplifier 15, so that the error value is reduced. Feedback control of the transmission power is performed so as to become zero
- Fig. 4 (a) when the transmission power set value 25 decreases and falls below the threshold value (APC control OFF), the switch unit 17 switches, and the error determination unit 18 switches to Fig. 4 (b).
- the gain control correction value 29 is input.
- the error determination unit 18 outputs a correction value 24 having a polarity (negative) opposite to the gain control correction value 29 as shown in FIG.
- the value 29 decreases as shown in Fig. 4 (d).
- the correction value becomes 0 as shown in FIG. 4 (c)
- the accumulator 19 shows the gain control correction value 2 9 as shown in FIG. 4 (d). Will be held.
- the transmission power feedback control allows Even if the closed loop control over the transmission power threshold value determined from the detection limit of the detection signal 20 is performed, the gain control signal B 24 suddenly changes as shown in FIG. Since no significant gain change is generated, smooth and accurate closed-loop transmission power control can be performed, and the same effect can be obtained.
- FIG. 5 is a block diagram showing a configuration example of a wireless communication device according to the third embodiment of the present invention.
- the wireless communication apparatus of the present example assumes digital transmission power feedback control as in the second embodiment.
- the form is a power value that converts each of the gain control correction value 29 and the transmission power set value 22.Gain control signal converters 8a and 8b are provided, and the converted signals are added to output the gain control signal B24. Configuration. Other configurations and operations are the same as in the second embodiment.
- the second embodiment adds the gain control correction value 29 and the transmission power set value 22, and then controls the gain by the power value Z gain control signal converter 8.
- the signal was converted to signal B 24, power value / gain control signal converters 8 a and 8 b were provided to convert the gain control correction value 29 and the transmission power set value 22, respectively.
- the gain control signal B 24 is output by adding the gain control correction signal and the gain control signal A.
- Other configurations and operations are the same as those of the second embodiment.
- one power value / gain control signal converter 8 has the output range necessary for controlling the variable gain amplifier 15 and the resolution required for error adjustment.
- a very large circuit scale is required to provide this, but by providing the power value / gain control signal converters 8a and 8b for each of the gain control calibration value 29 and the transmission power set value 25, However, the circuit scale can be reduced by providing appropriate output ranges and resolutions to the Z-gain control signal converters 8a and 8b, which convert the power values.
- Other effects are the same as those of the second embodiment.
- FIG. 6 is a block diagram showing a configuration example of the wireless communication device according to the fourth embodiment of the present invention.
- the same parts as those in the above-described second embodiment are denoted by the same reference numerals, and description thereof will be omitted as appropriate.
- the wireless communication apparatus of the present example assumes digital transmission power feedback control as in the second embodiment.
- the set value 30 after the correction of the transmission power is converted into the gain control signal B 24 by one power value Z gain control signal conversion unit 8, whereas in the present embodiment, the correction is performed in the present embodiment.
- a post-setting value judging unit 32 is provided, and the output destination of the transmission power-corrected setting value 30 according to the set power is changed to a high-resolution power value / gain control signal converting unit 8 c with a narrow output range.
- the configuration is such that the post-correction set value determination unit 32 switches to one of the power value gain control signal conversion units 8 d having a wide output range and low resolution.
- the power range gain control signal converter 8 d having a wide output range and low resolution is used, and when the set power is large, the power range gain control signal converter 8 c having a narrow output range and a high resolution is used. Used.
- Other configurations and operations are the same as those of the second embodiment.
- the output range required for controlling the variable gain amplifier 15 and the resolution required for adjusting the error are set in the power value Z gain control signal converter 8 for one unit.
- a very large circuit scale is required to provide
- the determination unit 32 converts the set value 30 after transmission power correction into the gain control signal B 24 by either the power value / gain control signal conversion unit 8 c or 8 d according to the set power. Therefore, the circuit scale can be reduced.
- Other effects are the same as those of the second embodiment.
- the power value Z gain control signal converter 8 is composed of two, but the same applies to the case where the power value gain control signal converter 8 is composed of three or more. The same effect can be obtained.
- the present invention is not limited to the above-described embodiment, and may be embodied in various other forms in specific configurations, functions, operations, and effects without departing from the gist thereof. .
- the closed loop transmission power control is not performed by the operation control signal of the transmission power determination unit 7, the operation of the transmission power detection unit 9, the error calculation unit 10 (or the detection signal power value conversion unit 16) is performed.
- the error integration unit 11 can be operated after the operation of other blocks is stabilized.
- the transmission power control range can be changed.
- the power value gain control converters 8, 8a, and 8b With a ramping output function, it is possible to support systems such as the TDMA system.
- the function can be selected according to the TDMA system as well as the CDMA system.
- the amount of correction per slot can be switched by changing the output value of the correction value of the error determination unit 18.
- the transmission power control range can be changed by switching the allowable range of the error determination unit 18.
- the provision of the buffer means allows the transmission power to be reduced when the closed loop control over the threshold which is the detection limit of the transmission power is performed.
- the threshold which is the detection limit of the transmission power
- the transmission power can be reduced when the closed loop control over the threshold which is the detection limit of the transmission power is performed. Even if the value greatly changes, abrupt gain change can be suppressed and smooth and highly accurate transmission power control can be performed.
- a switch unit, an error determination unit, an integration unit, and a transmission power determination unit are provided, and the gain control correction value output from the integration unit and the set power are separately set.
- the power value is converted into a gain control correction signal and a gain control signal by the gain control signal conversion unit, so that even when the transmission power greatly changes when closed-loop control Smooth and accurate transmission power control can be performed by suppressing a sudden change in gain, and the effect can be obtained without increasing the circuit scale.
- a switch section, an error determination section, an integration section, and a transmission power determination section are provided, and a gain control signal for controlling the variable gain amplifier is adapted to the magnitude of the set power.
- a plurality of power values obtained by the Z gain control signal converter a sudden gain change occurs even when the transmission power greatly changes when closed-loop control is performed over a threshold that is the detection limit of the transmission power. Smooth and highly accurate transmission power control can be performed by suppressing the above, and the effect can be obtained without increasing the circuit scale.
- the transmission power detection unit or the error calculation unit when the closed loop transmission power control is not being performed, the transmission power detection unit or the error calculation unit can be turned off to reduce the power consumption.
- the error integration unit by changing the output timing of the determination result of the transmission power determination unit, the error integration unit can be operated after the operation of another block is stabilized.
- the function selection not only for the CDMA system but also for the TDMA system is performed. be able to. '
- the transmission power control range can be changed by switching the threshold in the transmission power determination unit.
- the power value gain control converter by providing the power value gain control converter with a running output function, it is possible to cope with a system such as the TDMA system.
- the validity / invalidity of the running output function of the power value gain control converter can be selected, so that the function can be selected not only for the CDMA system but also for the TDMA system.
- the correction amount per slot can be switched by changing the output value of the correction value of the error determination unit.
- the transmission power control range can be changed by switching the allowable range of the error determination unit.
- by switching the output update period of the correction value of the error determination unit it is possible to select a function not only for the CDMA system but also for the TDMA system.
- the function of the error output and the function selection not only for the CDMA system but also for the TDMA system can be selected. Can be.
- the corrected transmission power control range can be changed by switching a level determination threshold for determining the magnitude of transmission power of the corrected set value determination unit. .
- the system is adapted to not only the CDMA system but also the TDMA system. Function can be selected.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/531,051 US7280839B2 (en) | 2002-12-26 | 2003-12-26 | Wireless communication device having gain error correcting feature |
EP03786391A EP1578036A4 (en) | 2002-12-26 | 2003-12-26 | WIRELESS COMMUNICATION DEVICE |
AU2003296170A AU2003296170A1 (en) | 2002-12-26 | 2003-12-26 | Wireless communication device |
CN200380101701.4A CN1706122B (zh) | 2002-12-26 | 2003-12-26 | 无线通信设备 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002377204A JP3970177B2 (ja) | 2002-12-26 | 2002-12-26 | 無線通信装置 |
JP2002-377204 | 2002-12-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004059885A1 true WO2004059885A1 (ja) | 2004-07-15 |
Family
ID=32677387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/017051 WO2004059885A1 (ja) | 2002-12-26 | 2003-12-26 | 無線通信装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7280839B2 (ja) |
EP (1) | EP1578036A4 (ja) |
JP (1) | JP3970177B2 (ja) |
CN (1) | CN1706122B (ja) |
AU (1) | AU2003296170A1 (ja) |
WO (1) | WO2004059885A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3978433B2 (ja) * | 2004-02-12 | 2007-09-19 | 松下電器産業株式会社 | 送信電力制御装置 |
JP4525292B2 (ja) * | 2004-10-21 | 2010-08-18 | 日本電気株式会社 | 無線通信機および送信電力制御方法 |
US7205842B2 (en) * | 2005-01-13 | 2007-04-17 | Telefonaktiebolaget Lm Ericsson (Publ) | Continuous alternating closed-open loop power control |
JP2007274134A (ja) * | 2006-03-30 | 2007-10-18 | Kyocera Corp | 無線通信装置及び送信電力制御方法 |
RU2523898C2 (ru) * | 2009-09-30 | 2014-07-27 | Колгейт-Палмолив Компани | Композиция антиперспиранта/дезодоранта |
US8565806B2 (en) | 2010-12-12 | 2013-10-22 | St-Ericsson Sa | Real time transmission power control |
CN102413543B (zh) * | 2011-11-30 | 2014-09-03 | 合肥东芯通信股份有限公司 | 一种lte系统的初始agc方法及设备 |
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- 2003-12-26 US US10/531,051 patent/US7280839B2/en not_active Expired - Fee Related
- 2003-12-26 AU AU2003296170A patent/AU2003296170A1/en not_active Abandoned
- 2003-12-26 WO PCT/JP2003/017051 patent/WO2004059885A1/ja active Application Filing
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Also Published As
Publication number | Publication date |
---|---|
AU2003296170A1 (en) | 2004-07-22 |
EP1578036A4 (en) | 2011-08-03 |
EP1578036A1 (en) | 2005-09-21 |
JP2004208180A (ja) | 2004-07-22 |
US20060009163A1 (en) | 2006-01-12 |
AU2003296170A8 (en) | 2004-07-22 |
CN1706122A (zh) | 2005-12-07 |
CN1706122B (zh) | 2010-05-26 |
JP3970177B2 (ja) | 2007-09-05 |
US7280839B2 (en) | 2007-10-09 |
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