WO2005078939A1 - 送信電力制御装置 - Google Patents
送信電力制御装置 Download PDFInfo
- Publication number
- WO2005078939A1 WO2005078939A1 PCT/JP2005/001836 JP2005001836W WO2005078939A1 WO 2005078939 A1 WO2005078939 A1 WO 2005078939A1 JP 2005001836 W JP2005001836 W JP 2005001836W WO 2005078939 A1 WO2005078939 A1 WO 2005078939A1
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- WIPO (PCT)
- Prior art keywords
- transmission power
- gain
- value
- calculation means
- correction value
- Prior art date
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 238
- 230000003321 amplification Effects 0.000 claims abstract description 81
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 81
- 238000004891 communication Methods 0.000 claims abstract description 24
- 230000006866 deterioration Effects 0.000 claims abstract description 8
- 230000007613 environmental effect Effects 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 23
- 238000005259 measurement Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 8
- 238000000926 separation method Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G1/00—Details of arrangements for controlling amplification
- H03G1/0005—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal
- H03G1/0088—Circuits characterised by the type of controlling devices operated by a controlling current or voltage signal using discontinuously variable devices, e.g. switch-operated
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
- H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G2201/00—Indexing scheme relating to subclass H03G
- H03G2201/10—Gain control characterised by the type of controlled element
- H03G2201/103—Gain control characterised by the type of controlled element being an amplifying element
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G2201/00—Indexing scheme relating to subclass H03G
- H03G2201/50—Gain control characterized by the means of gain control
- H03G2201/506—Gain control characterized by the means of gain control by selecting one parallel amplifying path
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G2201/00—Indexing scheme relating to subclass H03G
- H03G2201/70—Gain control characterized by the gain control parameter
- H03G2201/702—Gain control characterized by the gain control parameter being frequency, e.g. frequency deviations
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G2201/00—Indexing scheme relating to subclass H03G
- H03G2201/70—Gain control characterized by the gain control parameter
- H03G2201/708—Gain control characterized by the gain control parameter being temperature
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
- H04B2001/0416—Circuits with power amplifiers having gain or transmission power control
Definitions
- the present invention relates to a transmission power control apparatus, and is suitably applied to, for example, a wireless communication apparatus such as a base station apparatus and a communication terminal apparatus.
- the wireless communication apparatus needs to increase transmission power to transmit so that the communication partner can receive, but even if it is increased too much, it causes interference to wireless communication apparatuses other than the communication partner. Therefore, by performing transmission power control, the transmission power is adjusted appropriately.
- a transmission power control apparatus uses a variable amplification circuit that uses an analog control voltage as an input voltage.
- the variable amplification circuit has gain characteristics proportional to the analog control voltage generated by the DZA comparator.
- CD MA Code Division Multiple Access
- FIG. 1 is a diagram showing gain characteristics of a variable amplification circuit with respect to an analog control voltage.
- the control voltage DAC code
- the conventional transmission power control device stores the DAC code for any transmission power in the memory, and reads the DAC code from the memory as needed to control the amplification factor, so that it is accurate. Transmission power can be obtained.
- the transmission power resolution is determined by the resolution of the DZA converter and the control sensitivity characteristics of the variable amplifier circuit.
- Patent Document 1 Japanese Patent Application Laid-Open No. 11-177444
- FIG. 20 shows the DAC code characteristics of the DZA converter with respect to transmission power when using a variable amplification circuit under analog control. For example, if the designated transmission power values are set at equal intervals, the DAC code that realizes this will not be at equal intervals. That is, it is necessary to obtain DAC codes one by one so as to obtain a predetermined designated transmission power value. At this time, since the linearity is bad, it is necessary to make adjustment for compensating for component variation for each predetermined transmission power.
- An object of the present invention is to provide a transmission power control apparatus that reduces the number of steps required for adjustment of a transmission power control apparatus and performs high precision transmission power control in a wide dynamic range.
- the transmission power control apparatus has first and second variable amplifier circuits that amplify input signals with different gain resolutions, and a correction value calculation unit that calculates a correction value that guarantees the accuracy of transmission power.
- a transmission power designating means for designating transmission power to be output to the communication party based on a signal transmitted from the communication party; and a transmission power for calculating the transmission power by correcting the designated transmission power with the correction value.
- a configuration comprising: calculation means; and setting value calculation means for calculating gain values to be set in the first and second variable amplifier circuits based on the transmission power calculated by the transmission power calculation means. take.
- first and second variable amplifier circuits having different gain resolutions are prepared, and a correction value for guaranteeing transmission power accuracy is taken into consideration, and measurement of only one arbitrary transmission power is performed.
- the overall gain characteristics can be made linear, and optimal gain values can be set for the first and second variable amplifier circuits.
- the number of processes required can be reduced, and highly accurate transmission power control can be performed over a wide dynamic range.
- the first variable amplifier circuit and the second variable amplifier circuit having different gain resolutions are prepared, and transmission power accuracy caused by environmental changes such as frequency characteristics and temperature characteristics is prepared.
- transmission power control device By adjusting the transmission power control device by measuring only one point of the transmission power and adjusting the transmission power controller, taking into consideration the correction value for compensating for the deterioration of the signal and the correction value for compensating for the transmission power error. Since the optimum gain value can be set for the first and second variable amplifier circuits, the number of steps required for adjustment can be reduced, and high precision transmission power can be obtained over a wide dynamic range. Control can be performed.
- FIG. 2 A figure showing the DAC code characteristics of DZA comparator with respect to transmission power when using a variable amplification circuit by analog control.
- FIG. 3 A block diagram showing a configuration of a transmission power control apparatus according to Embodiment 1 of the present invention
- FIG. 4 A diagram in which the correspondence between the first variable amplifier circuit setting gain and the first variable amplifier circuit gain is taped off.
- FIG. 5 A diagram in which the correspondence between the second variable amplifier circuit setting gain and the second variable amplifier circuit gain is taped off.
- FIG. 6 A diagram showing gain characteristics of the first variable amplifier circuit according to Embodiment 1 of the present invention.
- FIG. 7 is a diagram showing gain characteristics of the second variable amplifier circuit in the first embodiment of the present invention.
- FIG. 8 A diagram showing the configuration of a digital control variable amplification circuit by current control
- FIG. 9 A diagram showing the configuration of a digitally controlled variable amplifier circuit by changing the number of stages of the amplifier circuit.
- FIG. 11 A diagram showing a configuration in which a gain set value control unit, a first variable amplification circuit control unit, and a second variable amplification circuit control unit are connected by a serial interface.
- FIG. 17 is a diagram showing the overall gain characteristic of the transmission power control apparatus according to Embodiment 1 of the present invention.
- FIG. 18 is a diagram showing a configuration of a transmission power control apparatus according to Embodiment 2 of the present invention.
- FIG. 19 A diagram showing the appearance of the I channel signal and the Q channel signal under control of the amplitude control unit.
- FIG. 20 A diagram showing IZQ amplitude characteristics in the second embodiment of the present invention
- FIG. 3 is a block diagram showing a configuration of a transmission power control apparatus according to Embodiment 1 of the present invention.
- transmission power specification unit 101 acquires broadcast information transmitted from the other party of communication, and notifies error calculation unit 102 and transmission power calculation unit 107 of the transmission power specified by the broadcast information.
- the error calculation unit 102 calculates an error between the transmission power notified from the transmission power specification unit 101 and the actual transmission power calculated by the actual transmission power calculation unit 129 described later, and calculates the calculated error. Output to the correction value calculation unit 106.
- the environmental change information notification unit 103 notifies the correction value calculation unit 106 of these amounts of change.
- the timing information generation unit 104 generates timing information for calculating a correction value, limits the amount of correction value which is the number of times for calculating the correction value, and manages the calculation period of the correction value. Thereby, for example, in the transmission power control of the CDMA system, the inter-slot correction value can be kept within the specified value.
- the generated timing information is output to the correction value calculation unit 106.
- Memory 105 stores a correction value that compensates for deterioration of transmission power accuracy due to component variation, and a correction value that compensates for deterioration of transmission power accuracy due to temperature characteristics and frequency characteristics. These correction values are output to the correction value calculation unit 106.
- the correction value calculation unit 106 corrects the transmission power with high accuracy based on the information output from the error calculation unit 102, the environment change information notification unit 103, the timing information generation unit 104, and the memory 105. A value is calculated, and the calculated correction value is output to the transmission power calculation unit 107.
- Transmission power calculation section 107 receives the designated power and correction value notified from transmission power designation section 101. Transmission power is calculated based on the correction value output from calculation unit 106, and the calculated transmission power is output to first set value calculation unit 108 and second set value calculation unit 109. Also, when there is feedback information from the second set value calculation unit 109, the feedback information is reflected in the calculation of the transmission power.
- First set value calculation section 108 has a table shown in FIG. 4 and, based on the transmission power value output from transmission power calculation section 107, a first variable amplifier circuit 122 according to the table of FIG. The gain value is output to the gain setting value control unit 110.
- Second set value calculation section 109 has a table shown in FIG. 5, and based on the transmission power value output from transmission power calculation section 107, a second variable amplifier circuit 123 according to the table of FIG. Output the gain value to gain setting value control section 110. Also, when the dynamic range of the second variable amplifier circuit 123 has reached the limit, a feedback signal is output to the transmission power calculation unit 107.
- gain control can be performed within the dynamic range of the second variable amplification circuit, and the overall gain characteristics of the first variable amplification circuit and the second variable amplification circuit can be kept linear.
- the gain set value control unit 110 obtains a gain code based on the gain set value output from the first set value calculation unit 108 and the second set value calculation unit 109, and the first gain code is calculated.
- the variable amplification circuit control unit 111 and the second variable amplification circuit control unit 112 are controlled.
- the first variable amplification circuit control unit 111 controls the first variable amplification circuit 122 according to the gain code output from the gain setting value control unit 110.
- the second variable amplification circuit control unit 112 controls the second variable amplification circuit 123 in accordance with the gain code output from the gain setting value control unit 110.
- Transmission data generation section 113 generates data to be transmitted to the communication partner, and outputs the generated data to IZQ separation section 116.
- the amplitude control unit 114 outputs a control signal for controlling the amplitude of the IZQ signal to the IZQ separation unit 116.
- EVM error vector amplitude
- the DC value control unit 115 outputs a control signal for controlling the DC value of the IZQ signal to the IZQ separation unit 116.
- EVM characteristics can be secured by reducing carrier admission.
- the IZQ separation unit 116 transmits the transmission data output from the transmission data generation unit 113 to the I Separates the signal into Q and Q channel signals, and performs amplitude control and DC value control.
- the I channel signal is output to mixer 119 and the Q channel signal is output to mixer 120.
- the local oscillator 117 oscillates the carrier frequency, and the oscillation signal is multiplied by the mixer 119 to the I channel signal, while the phase shifter 118 is phase-shifted by 90 ° and the mixer 120 is multiplied by the Q channel signal.
- the signals multiplied by the oscillation signals by the mixers 119 and 120 are combined by the combining circuit 121 and output to the first variable amplifier circuit 122 as a transmission output signal.
- the first variable amplifier circuit 122 has the gain characteristics shown in FIG. 6, and can set the gain value for each ldB by digital control. Then, the transmission output signal output from the combining circuit 121 is amplified with a gain value according to the control of the first variable amplification circuit control unit 111, and the transmission output signal after amplification is output to the second variable amplification circuit 123.
- the table of FIG. 4 included in the above-described first set value calculation unit 108 is a group of gain characteristics shown in FIG.
- the second variable amplification circuit 123 has the gain characteristics shown in FIG. 7, and can set the gain value every 0.1 dB by digital control. Then, the transmission output signal output from the first variable amplification circuit 122 is amplified with a gain value under the control of the second variable amplification circuit control unit 112, and the transmission output signal after amplification is output to the band limiting filter 124. .
- the table of FIG. 5 which the above-mentioned second set value calculation unit 109 has is a group of gain characteristics shown in FIG.
- the first variable amplification circuit 122 and the second variable amplification circuit 123 have the configuration shown in FIG. 8 or FIG.
- FIG. 8 shows the configuration of a digitally controlled variable amplifier circuit based on current control.
- gain control based on the current value is performed by connecting a plurality of current sources 1 n and switches SW 1 to SW n in parallel to the variable amplification circuit.
- switching is performed by digital control and the gain value changes.
- FIG. 9 shows the configuration of a digitally controlled variable amplifier circuit by changing the number of stages of the amplifier circuit.
- the n amplification circuits are connected in series, interlock switches are provided in the respective amplification circuits, and gain control is performed by switching the interlock switches to determine whether or not the signal for input to the amplification circuits is input.
- switching of the interlock switch is performed by digital control, and the gain value changes.
- the transmission output signal amplified by the second variable amplification circuit 123 is banded by the band limiting filter 124. It is band limited, power amplified by the power amplifier 125, and branched by the power bra 126. One of the branched transmission output signals is transmitted to the communication partner via the antenna 127, and the other is output to the transmission power measurement unit 128.
- the transmission power measurement unit 128 is a detection diode or the like, measures transmission power, and outputs the measurement result to the actual transmission power calculation unit 129.
- the actual transmission power calculation unit 129 calculates the transmission power of the signal actually transmitted from the transmission power measurement unit 128 measured by the transmission power measurement unit 128, and outputs the calculated actual transmission power to the error calculation unit 102. .
- the detection voltage is uniformly low (for example, 25mV). — 44m V) 0 Detection voltage ⁇ et al.
- the transmission power calculation unit 107 calculates the transmission power error calculated by the error calculation unit 102 as the correction value as long as the measurement accuracy of the actual transmission power is equal to or more than the predetermined transmission power (specified transmission power). Reflected in the calculation. On the other hand, if it is less than a predetermined transmission power (specified transmission power), the transmission power error is not reflected in the calculation of the correction value. This enables highly accurate transmission power control.
- FIG. 11 is a diagram showing a configuration in which the gain setting value control unit 110, the first variable amplification circuit control unit 111, and the second variable amplification circuit control unit 112 are connected by a serial interface.
- a data signal D1, a clock signal Cl, and a strobe signal S1 are output from the gain setting value control unit serial interface 801 to the first variable amplification circuit control unit serial interface 802.
- the data signal D1, the clock signal C1, and the strobe signal S2 are output from the gain setting value control unit serial interface 801 to the second variable amplification circuit control unit serial interface 803.
- the strobe signals S1 and S2 are signals for determining which of the first variable amplification circuit control unit serial interface 802 and the second variable amplification circuit control unit serial interface 803 the data is set.
- strobe signals corresponding to each serial interface are prepared. However, as shown in FIG. 12, the strobe signal can be made common by adding a register address for determining which interface has set the data in the serial data.
- first variable amplification circuit control unit 111 and the second variable amplification circuit control unit 112 are shared by one control unit, one serial interface format can be obtained as shown in FIG. .
- first variable amplification circuit control unit 111 and the second variable amplification circuit control unit 112 are shared by one control unit, one serial interface format can be obtained as shown in FIG. .
- the respective transmission power control timings are different, the respective It can control at the timing.
- specified transmission power value is set to 56-24 dB
- the setting value of the variable amplifier circuit for obtaining the specified transmission power value is based on FIG. 4 and FIG. It will be.
- p of the variable amplification circuit setting value indicates an arbitrary gain code within the gain control range of the first variable amplification circuit 122.
- q indicates an arbitrary gain code within the gain control range of the second variable amplification circuit 123.
- p and q indicate the component variation correction values adjusted at the time of product shipment for a certain transmission power.
- FIG. 15 is a diagram showing the relationship between the frequency and the correction value (frequency correction value).
- fl 1 fl 2 is an arbitrary frequency determined in advance for obtaining a correction value
- rl 1 r 12 is a frequency correction value corresponding to each of the frequency fl 1 f 12.
- the frequency correction value can be calculated by performing linear approximation for the frequency between the determined frequencies. For example, when calculating the frequency correction value r for the frequency f between the frequency ⁇ and f 2, for example, it can be obtained by the following equation (1).
- the relationship between the frequency and the frequency correction value is summarized in a table as shown in FIG. 16 and stored in the memory 105, and the calculation of the equation (1) is performed by the correction value calculation unit 106. Do. This enables high-speed and highly accurate transmission power control when there is a change in frequency.
- the environment correction value are R, R
- Equation (2) max indicates the maximum transmission power, and for example, in the case of the above-described W-CDMA system, it is 24 dBm in Power class 3. Also, x represents an arbitrary value smaller than max.
- the above equation (2) is made up of the ldB resolution term and the 0. ldB resolution term, whereby the gain value can be set for each of the first variable amplification circuits 122 and 0. ldB that can set the gain value for each 1 dB.
- Optimal gain values can be specified for each of the second variable amplification circuits 123 that can be set. That is, the gain value set in the first variable amplifier circuit 122 is p ⁇ (max ⁇ X) + r.
- the gain value set in the second variable amplification circuit 123 is q + r.
- the transmission power is measured at any one output level point, and p and q are obtained from the above equation (2).
- An overall gain characteristic as shown in 17 can be obtained. That is, as shown in FIG. 17, the accuracy over the entire dynamic range is guaranteed according to the designated transmission power value. Further, since the frequency correction value and the temperature correction value are prepared in advance, even when the frequency or temperature changes, high-accuracy transmission power control can be realized only by updating the environment correction value r. The transmission power error can be similarly corrected.
- a variable amplifier circuit of ldB resolution and a variable amplifier circuit of 0.1 ldB resolution are prepared, and are generated due to environmental changes such as frequency characteristics and temperature characteristics. Correction of the transmission power accuracy and a correction value to compensate for the transmission power error, and the measurement of only one transmission power point is performed to adjust the transmission power control device.
- the gain characteristics can be made linear, and optimal gain values can be set for the two variable amplifier circuits, so the number of steps required for adjustment can be reduced, and a wide dynamic range and high accuracy can be achieved.
- Transmission power control can be performed. In addition, power consumption can be reduced because DZA converter and analog control variable amplifier circuit are not used.
- the first embodiment has described the case where two variable amplifier circuits having different resolutions are provided, but the second embodiment of the present invention describes the case where one variable amplifier circuit is provided.
- FIG. 18 is a diagram showing a configuration of a transmission power control apparatus according to Embodiment 2 of the present invention.
- FIG. 18 differs from FIG. 3 in that the gain setting value control unit 110 is changed to the gain setting value control unit 1501 and that the second variable amplification circuit control unit 112 and the second variable amplification circuit 123 are respectively deleted. is there.
- Gain set value control unit 1501 obtains and obtains a gain code based on the gain set values output from first set value calculation unit 108 and second set value calculation unit (amplitude value calculation unit) 109.
- the first variable amplification circuit control unit 111 and the amplitude control unit 114 are controlled by the gain code.
- Amplitude control section 114 outputs a control signal for controlling the amplitude of the IZQ signal to IZQ separation section 116 according to the gain code outputted from gain setting value control section 1501.
- FIG. 19 is a diagram showing an aspect of the I channel signal and the Q channel signal which are controlled by the amplitude control unit 114.
- the maximum amplitude Y + 0.1 l ⁇ kZ2 dB, and the minimum amplitude Y ⁇ 0.1 l ⁇ kZ2 dB with respect to the reference amplitude Y, and the amplitude between the minimum amplitude and the maximum amplitude It shows that it can be controlled.
- the second set value calculation unit 109 calculates a set value below the minimum amplitude or a set value exceeding the maximum amplitude, it outputs a feedback signal to the transmission power calculation unit 107.
- the amplitude control of the IZQ signal is made within a predetermined range.
- the error vector amplitude is degraded due to the change in the carrier leak amount determined by the ratio of the amplitude value of the 1 channel signal and the Q channel signal to the DC value, and distortion in the mixer caused by the amplitude change of the transmission signal.
- An accompanying degradation of the adjacent channel leakage power ratio may occur.
- the transmission power calculation unit 107 receives the feedback signal generated by the second set value calculation unit 109 when the amplitude value exceeding the predetermined amplitude range is calculated, the transmission power calculation unit 107 calculates the first set value calculation unit 108.
- the second set value calculation unit 109 calculates the gain value again, the amplitudes of the I channel signal and the Q channel signal can be kept within a predetermined range, and the error of vector amplitude, adjacent channel It is possible to avoid the deterioration of the leakage power ratio.
- I dB resolution is realized by the amplitude control of the IZQ signal, and by combining with the variable amplification circuit of I dB resolution, compared to the case where a plurality of variable amplification circuits are provided.
- the circuit scale can be reduced.
- first and second variable amplifier circuits that amplify input signals with different gain resolutions, and correction value calculation means for calculating a correction value that guarantees the accuracy of transmission power
- Transmission power calculation means for specifying transmission power to be output to the communication party based on a signal transmitted from the communication party, and transmission for calculating the transmission power by correcting the designated transmission power with the correction value
- a transmission power control apparatus comprising: power calculation means; and setting value calculation means for calculating gain values to be set in the first and second variable amplifier circuits based on the transmission power calculated by the transmission power calculation means. It is.
- first and second variable amplifier circuits with different gain resolutions are prepared, and a correction value for guaranteeing transmission power accuracy is taken into consideration, and measurement of only one arbitrary transmission power is performed. Adjustment of the transmission power control device to make the overall gain characteristics linear. Since it is possible to set optimum gain values for the first and second variable amplifier circuits, it is possible to reduce the number of steps required for adjustment, and to control transmission power with a wide dynamic range and high accuracy. It can be performed.
- a first variable amplification circuit for amplifying an input signal, an amplitude control means for performing amplitude control of an I channel signal and a Q channel signal, and a correction value for assuring the accuracy of transmission power.
- the transmission power designation unit designates transmission power to be output to the communication partner based on the signal transmitted from the communication partner, and corrects the designated transmission power with the correction value.
- transmission power calculation means for calculating transmission power; setting value calculation means for calculating a gain value to be set to the first variable amplification circuit based on the transmission power calculated by the transmission power calculation means; It is a transmission power control apparatus comprising: amplitude value calculation means for calculating an amplitude value to be set in the amplitude control means based on the corrected transmission power calculated by the transmission power calculation means.
- the transmission power to be output to the communication partner is different in resolution from the first variable amplifier circuit, and the amplitude control means for controlling the amplitudes of the I channel signal and the Q channel signal have different gain values. And adjust the transmission power control device by measuring any one point of the transmission power with the correction value to guarantee the transmission power accuracy taken into account, and make the overall gain characteristics linear. Since it is possible to set optimal gain values for the first and second variable amplifier circuits, it is possible to reduce the number of steps required for adjustment, and to perform accurate transmission power control in a wide dynamic range. Can.
- the correction value calculation means comprises storage means for storing an environmental characteristic correction value that compensates for deterioration in transmission power accuracy caused by frequency characteristics and temperature characteristics.
- the transmission power control apparatus calculates a correction value after the environmental change using the environmental characteristic correction value stored in the storage unit.
- high-speed and high-precision transmission power control can be performed by calculating the correction value after the environmental change using the environmental characteristic correction value stored in the storage unit. It can be performed.
- the correction value calculation means is configured to transmit the transmission power designated by the transmission power designation means and the actual transmission power actually output to the communication partner.
- Transmission power which comprises an error calculation means for calculating an error, and based on the transmission power designated by the transmission power designation means, determines whether or not the correction of the error is reflected in the calculation of the correction value. It is a control device.
- the transmission power of the high area is strictly defined as the accuracy guarantee in the standard. Therefore, based on the transmission power designated by the transmission power designation unit, transmission is performed when the designated transmission power is high by determining whether the correction of the error is to be reflected in the calculation of the correction value. Since the measurement accuracy of power is high, the error correction is reflected, and when the specified transmission power is low, the measurement accuracy of transmission power is low, so that the error correction is not reflected, so that highly accurate transmission power control is possible. It can be performed.
- the correction value calculation means comprises timing information generation means for generating timing information for calculating the correction value, and the timing information generation means is based on the timing information. It is a transmission power control apparatus that manages the correction value amount limit, which is the number of times the correction value is calculated, and the calculation period of the correction value.
- the correction value amount limit which is the number of times the correction value is calculated, and the calculation period of the correction value based on the timing information, for example, in transmission power control of a CDMA system, etc.
- the correction value can be calculated by keeping the inter-slot correction value amount within the specified value.
- the transmission power calculation means generates the set value calculation means when a gain value outside the dynamic range of the second variable amplifier circuit is calculated.
- a transmission power control apparatus which causes the set value calculation means to calculate the gain value again.
- the transmission power calculation means when the gain value out of the dynamic range of the second variable amplifier circuit is calculated, the feedback signal generated by the second set value calculation means is received, and the first setting is performed.
- the gain control can be performed within the dynamic range of the second variable amplification circuit by causing the value calculation means and the second set value calculation means to calculate the gain value again, and the first variable amplification circuit and the first variable amplification circuit can 2)
- the overall gain characteristics of the variable amplification circuit can be kept linear.
- the transmission power calculation means generates a feedback value generated by the amplitude value calculation means when an amplitude value exceeding a predetermined amplitude range is calculated. It is a transmission power control apparatus which receives the back signal and causes the set value calculation means and the amplitude value calculation means to calculate gain values again.
- the error vector amplitude may be degraded due to the change of the amount, and the adjacent channel leakage power ratio may be degraded due to the distortion in the mixer caused by the amplitude change of the transmission signal
- the amplitude value beyond the predetermined amplitude range is calculated.
- the feedback signal generated by the amplitude value calculation means is received, and the first set value calculation means and the amplitude value calculation means recalculate the gain value to calculate the amplitudes of the I channel signal and the Q channel signal. It can be within a predetermined range, and the degradation of error vector amplitude and the degradation of adjacent channel leakage power ratio can be avoided.
- a first variable amplifier circuit control means for controlling a gain value of the first variable amplifier circuit, and a gain value of the second variable amplifier circuit are controlled.
- a gain code is determined based on the second variable amplification circuit control means and the gain value calculated by the set value calculation means, and the first variable amplification circuit control means and the second variable amplification circuit control are calculated using the calculated gain code.
- a transmission power control apparatus comprising: gain setting value control means for independently controlling the means using a predetermined control format.
- the first variable amplifier circuit and the second variable amplifier circuit control means can be obtained. It is composed of different circuits, and even when the transmission power control timings are different, they can be controlled at each timing.
- variable amplification circuit control means for controlling the gain value of each of the first variable amplification circuit and the second variable amplification circuit, and calculation by the set value calculation means
- a transmission power control apparatus comprising: gain set value control means for obtaining a gain code based on the obtained gain value and controlling the variable amplifier circuit control means using a predetermined control format according to the obtained gain code.
- the first variable amplification circuit control means for controlling the gain value of the first variable amplification circuit, and the gain value calculated by the set value calculation means.
- Transmission power comprising: gain set value control means for obtaining a gain code based on the obtained gain code and independently controlling the first variable amplification circuit control means and the amplitude control means using a predetermined control format It is a control device.
- the first variable amplifier circuit and the amplitude control means are configured by different circuits. Even when transmission power control timings are different, control can be performed at each timing.
- the transmission power control apparatus has the effect of reducing the number of steps required for adjustment and performing high-precision transmission power control in a wide dynamic range, and has the effect of being applied to a wireless communication apparatus. be able to.
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Abstract
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/589,076 US7496375B2 (en) | 2004-02-12 | 2005-02-08 | Transmission power control device |
CN2005800044422A CN1918798B (zh) | 2004-02-12 | 2005-02-08 | 发送功率控制装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2004035027A JP3978433B2 (ja) | 2004-02-12 | 2004-02-12 | 送信電力制御装置 |
JP2004-035027 | 2004-02-12 |
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WO2005078939A1 true WO2005078939A1 (ja) | 2005-08-25 |
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PCT/JP2005/001836 WO2005078939A1 (ja) | 2004-02-12 | 2005-02-08 | 送信電力制御装置 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7496375B2 (ja) |
JP (1) | JP3978433B2 (ja) |
CN (1) | CN1918798B (ja) |
WO (1) | WO2005078939A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2011161759A1 (ja) * | 2010-06-22 | 2011-12-29 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
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US7899419B2 (en) * | 2004-01-16 | 2011-03-01 | Research In Motion Limited | Method and apparatus for compensating code channel power in a transmitter |
JP2007295472A (ja) * | 2006-04-27 | 2007-11-08 | Kyocera Corp | Agc回路及びこれを用いた無線機 |
US7940859B2 (en) * | 2006-08-04 | 2011-05-10 | Panasonic Corporation | Transmission circuit and communication device |
EP2102992B1 (en) | 2006-12-21 | 2012-07-04 | Icera Canada ULC | Closed-loop digital power control for a wireless transmitter |
JP5088131B2 (ja) * | 2007-12-28 | 2012-12-05 | 富士通株式会社 | 電力制御回路及び電力制御方法 |
KR101549572B1 (ko) * | 2008-11-25 | 2015-09-02 | 삼성전자주식회사 | 멀티 셀 hsdpa를 지원하는 이동통신 시스템에서 채널 품질 인식자 전송용 물리제어채널의 전송전력을 조절하는 방법 및 장치 |
US8618983B2 (en) * | 2009-09-13 | 2013-12-31 | International Business Machines Corporation | Phased-array transceiver for millimeter-wave frequencies |
WO2018110620A1 (ja) * | 2016-12-15 | 2018-06-21 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
US20210176714A1 (en) * | 2018-08-21 | 2021-06-10 | Ntt Docomo, Inc. | User equipment and transmission power control method |
CN109450564B (zh) * | 2018-10-19 | 2019-10-08 | 小唐科技(上海)有限公司 | 一种pa发送功率校准和补偿方法 |
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- 2005-02-08 CN CN2005800044422A patent/CN1918798B/zh not_active Expired - Fee Related
- 2005-02-08 US US10/589,076 patent/US7496375B2/en not_active Expired - Fee Related
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WO2011161759A1 (ja) * | 2010-06-22 | 2011-12-29 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
JP5564111B2 (ja) * | 2010-06-22 | 2014-07-30 | ルネサスエレクトロニクス株式会社 | 半導体装置 |
Also Published As
Publication number | Publication date |
---|---|
JP3978433B2 (ja) | 2007-09-19 |
US20070176681A1 (en) | 2007-08-02 |
JP2005229274A (ja) | 2005-08-25 |
US7496375B2 (en) | 2009-02-24 |
CN1918798A (zh) | 2007-02-21 |
CN1918798B (zh) | 2010-05-12 |
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