CN1914810A - Transmitter and wireless communication apparatus - Google Patents
Transmitter and wireless communication apparatus Download PDFInfo
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- CN1914810A CN1914810A CN 200580003297 CN200580003297A CN1914810A CN 1914810 A CN1914810 A CN 1914810A CN 200580003297 CN200580003297 CN 200580003297 CN 200580003297 A CN200580003297 A CN 200580003297A CN 1914810 A CN1914810 A CN 1914810A
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Abstract
A transmitter apparatus that exhibits a high efficiency and that can provide a wide variable output control width. An operation of saturation mode is performed in the vicinity of the maximum transmission power. A large-power amplifier(12) is caused, by increasing and then fixing the input level thereof, to operate in a saturation state, while the amplitude component of a modulation signal in a range corresponding to an output power control level is inputted to an R-input terminal(33) to amplitude modulate the power supply voltage(VDD) of a power supply terminal(25), thereby performing a polar coordinate modulation of a high efficiency. An operation of linear mode is performed for a smaller transmission power. The large-power amplifier(12) is caused, by reducing the input level thereof, to perform a linear operation, while the power supply voltage(VDD) of the power supply terminal(25) is varied in accordance with the output power control level, thereby performing a transmission power control.
Description
Technical field
The present invention relates to a kind of transmitter and a kind of radio communication device that uses this transmitter that can control its output changeably.
Background technology
For a kind of transmitter that can control its output changeably, the power efficiency in the assessment transfer function and the linearity are as the index of measuring device performance.The power efficiency in the transfer function and the linearity are the most important indexs of the performance of indication device, especially in the high frequency modulated distribution of machine such as mobile phone.
The category-A operational amplifier is widely used as the amplifier of the final stage of such high frequency modulated distribution of machine.Class-a amplifier has little distortion, that is, the linearity is fine, but provides little power efficiency, and this is because it always consumes the power that is attended by the direct current biasing composition.
Then, following method is designed to a kind of method of the amplifier of operate power expeditiously, and this method utilizes the saturation region of transistorized I/O power characteristic to change drain voltage or collector voltage (supply voltage) in response to the amplitude composition of the baseband signal that will amplify.For example, when changing average output power, change above-mentioned supply voltage pro rata with any average output power of wanting.As this class device, for example, the variable transmitter of output that discloses in Japan Patent No.3044057 (patent document 1) is available.
Figure 11 is a block diagram, shows a configuration of exporting variable transmitter in the association area example.The variable transmitter of this output comprises: modulation input 101 and 102; Carrier oscillator 104; Quadrature modulator 103 is used for modulating according to the output frequency of carrier oscillator 104 quadrature modulation of the output of input 101 and 102; High frequency power amplifier 105; Send output 106; Envelope (envelope) generative circuit 107 is used for generating envelope according to the output of modulation input 101 and 102; Specify (specification) signal input part 112; Multistage DC signal generating circuit 108 is used for importing a signal so that the average output rank of power amplifier 105 is set from specification signal input 112, and generates the DC signal of the input value correspondence of signal therewith; Mlultiplying circuit 109 is used for the output of envelope generative circuit 107 and the output multiplication of multistage DC signal generating circuit 108; Voltage control circuit 110 is used for the drain voltage in response to the output control power amplifiers 105 of mlultiplying circuit 109; And power supply terminal 111.
Yet, in the variable transmitter of output in association area example shown in Figure 11, Modulation and Amplitude Modulation and transmission output control are always controlled as drain voltage and are jointly carried out, thereby the output of transmitted power control variable-width is subjected to the restriction of the characteristic of power amplifier 105.For the variable transmitter of output in this association area example is installed, can only ensure limited control voltage range (for example, 0.3 volt to 3.0 volts) and power amplifier gain-variable width (for example, 20dB/dec) in the mobile phone of reality.Like this, as in the communicator in recently the mobile phone standard (for example, in the EGPRS of the mobile phone standard in Europe, being about 43dB+ α), can not fully ensure necessary transmission output level range at the wide output of needs control variable-width.
The frequency of using maximum transmission to export the mobile phone of operating is lower.This is caused that by the following fact order of base station is provided with transmitted power low to avoid interference and to improve the utilization ratio of sub-district (cell).Therefore, in order to prolong the possible change-over time of mobile phone, not only the inhibition power consumption is an important problem when maximum transmission output but also when low transmission is exported.
Patent document 1: Japan Patent No.3044057 (p1-p20, Fig. 1)
Patent document 2:JP-A-2003-18026
Patent document 3:JP-A-2003-51751
Patent document 4:JP-A-2004-104194
Patent document 5:JP-A-2004-173249
Patent document 6:JP-A-3-276923
Summary of the invention
The technical problem to be solved in the present invention
Thereby an object of the present invention is to provide a kind of transmitter and radio communication device that wide output control variable-width can be provided with high efficiency.
The technical scheme of technical solution problem
According to the present invention, a kind of transmitter has been proposed, comprising: quadrature modulation apparatus is used to import the same phase constituent and the orthogonal component of input modulating signal, and carries out quadrature modulation; Variable gain amplifying apparatus is used to utilize the output of amplifying this quadrature modulation apparatus based on the gain of gain control signal control; And power amplifier device, be used for power amplification is carried out in the output of this variable gain amplifying apparatus; Wherein, this power amplifier device has and is used for utilizing the linear operating region of I/O power characteristic to carry out the linear model of power amplification, and the saturation mode that is used for utilizing the operated in saturation district of I/O power characteristic to carry out power amplification; And wherein, be equal to or greater than predetermined value if send power output, then adjust the output rank of this variable gain amplifying apparatus, this power amplifier device of operation under saturation mode, and will be input to the output control input end of this power amplifier device to carry out polar coordinate modulated by amplitude-modulated transmission output control signal based on the amplitude composition of this input modulating signal; If send power output less than predetermined value, then adjust the output rank of this variable gain amplifying apparatus, finish drilling at linear model and to make this power amplifier device, and will have and export control signal in response to the transmission of the intended level of this transmissions power output and be input in this output control input end to carry out linear amplification.
According to this configuration, be equal to or greater than predetermined value if send power output, then carry out high-efficiency polar coordinate modulation, and if send power output less than predetermined value, then can carry out linear amplification; According to this operation of two types, can widen output control variable-width.Therefore, Modulation and Amplitude Modulation in the polar coordinate modulated and transmission power control can be separated to control, and can alleviate the dynamic range shortage in the polar coordinate modulated system, and make and can provide wide output control variable-width with high efficiency.
As a kind of form of the present invention, in this transmitter, if send that power output is in maximum output rank or in maximum output stage near other, then this power amplifier device carries out polar coordinate modulated, if and send power output less than this maximum output rank or should the maximum output stage be worth near other, then this power amplifier device carries out linear amplification.
According to this configuration, near sending the maximum output rank of power output, carry out high-efficiency polar coordinate modulation, and in less transmission power output, carry out linear amplification, may near exporting rank, maximum carry out thus amplifying according to the high efficiency of polar coordinate modulated, if and the output rank is less, then may in wide output level range, send output control by linear amplification.Like this, for example, in this power amplifier device, also be easily possible in such transmission output control that surpasses in the wide region of gain-variable width.
As a kind of form of the present invention, in this transmitter, this power amplifier device comprises the power supply terminal as this output control input end; This transmitter also comprises power supply driver, this power supply driver be used to increase the signal of intended level or based on the amplitude composition of this input modulating signal by the current capacity of amplitude-modulated signal, and provide power supply as this transmission output control signal to this power supply terminal.
According to this configuration, power supply driver strengthens amplitude composition according to input modulating signal by the current capacity of amplitude-modulated signal, and as sending the power supply terminal that the output control signal offers power amplifier device, be equal to or greater than predetermined value if send power output thus, then can carry out high-efficiency polar coordinate modulation.
As a kind of form of the present invention, in this transmitter, power amplifier device comprises: power supply terminal, to the fixing power supply of its input; And the amplifying circuit bias terminal that is used as this output control input end, import this transmission output control signal to this amplifying circuit bias terminal.
According to this configuration, fixing power supply is input to the power supply terminal of power amplifier device, and will be input to bias terminal by amplitude-modulated signal as sending the output control signal according to the amplitude composition of input modulating signal, be equal to or greater than predetermined value if send power output thus, then can carry out high-efficiency polar coordinate modulation.In this configuration, eliminated needs, and carried out amplitude-modulated situation with power supply and compare power amplifier device to the power supply driver that improves current capacity, can the simplification device configuration.
As a kind of form of the present invention, transmitter also comprises sending exports the control signal importation, be used to import this transmission output control signal, wherein this transmission output control signal importation comprises the DA transducer that is used for digital signal is converted to analog signal, and wherein, this DA transducer can change operating clock and have the operating clock handoff functionality, is used for only when just utilizing the operating clock higher than the operating clock when carrying out linear amplification to operate when power amplifier device carries out polar coordinate modulated.
According to this configuration, only when in power amplifier device, carrying out polar coordinate modulated, just operate the DA transducer that sends output control signal importation with high operating clock, only when operating, polar coordinate modulated improves operating current thus, and make and to carry out suitable Modulation and Amplitude Modulation, and can when linear amplifieroperation, reduce operating current and reduce overall power consumption.
As a kind of form of the present invention, in this transmitter, the importation of this power supply driver comprises the operational amplifier that is used for waveform shaping, and this operational amplifier can change operating current, and have the operating current handoff functionality, be used for only when when power amplifier device carries out polar coordinate modulated, just increasing operating current than the operating current when carrying out linear amplification.
According to this configuration, only when in power amplifier device, carrying out polar coordinate modulated, just increase the operating current of operational amplifier of the importation of power supply driver, when polar coordinate modulated is operated, can utilize big operating current to carry out suitable Modulation and Amplitude Modulation thus, and when linear amplifieroperation, can reduce operating current and reduce overall power consumption.
As a kind of form of the present invention, in this transmitter, linear regulator is as power supply driver.
As a kind of form of the present invention, in this transmitter, switching regulaor is as power supply driver.
As a kind of form of the present invention, in this transmitter, power supply driver comprises: amplitude limiter is used for the different voltage level of segmentation the control signal amplitude limit being exported in this transmission; A plurality of switching regulaors are used for converting supply voltage to the different value of segmentation voltage: and switches set is used for selecting any one of output voltage of these a plurality of switching regulaors.
As a kind of form of the present invention, this transmitter and then comprise: the demodulation part is used for the output of this power amplifier device of demodulation; Control section, the information that the restituted signal that provides based on this demodulation section branch is provided is when adjust amplitude-modulated timing when this power amplifier device carries out polar coordinate modulated.
According to this configuration, the feasible information that can provide according to the output by the demodulation power amplifier device (for example, EVM (error vector quantity) (value of indication modulation accuracy), or the like), when polar coordinate modulated, carry out the timing adjustment of amplitude information and phase information, and the feasible distortion that can reduce the output of transmitter.
According to the present invention, a kind of radio communication device that comprises above-mentioned arbitrary transmitter has been proposed.In the radio communication device of this configuration, the efficient amplification of big transmission power output is possible, and the transmission power control on wide rank is possible; If the present invention is used in the small-sized mobile radio communication device such as mobile phone, the present invention is more effective.
Technique effect of the present invention
According to the present invention, a kind of transmitter and radio communication device can be provided, they can provide big output control variable-width with high efficiency.
Description of drawings
Fig. 1 is a block diagram, and the configuration according to the transmitter of the first embodiment of the present invention is shown.
Fig. 2 shows the transmission power control standard in the 900-MHz of European mobile phone standard wave band EGPRS system.
Fig. 3 shows the I/O characteristic of high power amplifier in the present embodiment.
Fig. 4 is that the supply voltage of the high power amplifier in the present embodiment is to other performance plot of power output stage.
Fig. 5 is a block diagram, shows the configuration of transmitter according to a second embodiment of the present invention.
Fig. 6 is a block diagram, shows the configuration of the transmitter of a third embodiment in accordance with the invention.
Fig. 7 is a block diagram, shows the configuration of the transmitter of a fourth embodiment in accordance with the invention.
Fig. 8 is a block diagram, shows the configuration of radio communication device according to a fifth embodiment of the invention.
Fig. 9 is a block diagram, shows the configuration of radio communication device according to a sixth embodiment of the invention.
Figure 10 is a block diagram, shows the configuration of transmitter according to a seventh embodiment of the invention.
Figure 11 is a block diagram, shows the configuration of the variable transmitter of output in the association area example.
The drawing reference numeral explanation
10,40,50,60,200 send part
11 linear modulators
12,62 high power amplifiers
13,41,51,61,201 Modulation and Amplitude Modulation parts
14,15,21 fixed clocks input DA transducer (DAC)
16,17,22,76,77 low pass filters (LPF)
18 quadrature modulators
19 intermediate power amplifiers
20 local oscillators
23,52 high speed operation amplifiers
24,53,203 power supply drivers
25,63 power supply terminals
30,80 control sections
31 I inputs
32 Q inputs
33 R inputs
34,93 gain controlling terminals
35 outputs
36 clock switched terminal
37 current switching terminals
42 V-CLKs input DA transducer
64 bias terminal
65 fixed power source
70 receiving units
71 band pass filters (BPF)
72 low noise amplifiers
73 quadrature demodulators
74,75 baseband amplifiers
78,79 AD converter (ADC)
81 duplexers
82 antennas
91 I outputs
92 Q outputs
204 amplitude limits (Amplitude slice) device
205,206 switches
207 linear regulators
208,209 switching regulaors
210 voltage sources
300 model selection parts
301 transmission output control signals
302 magnitude determinations parts
Embodiment
In each embodiment, the configuration example that is used for mobile phone is as comprising that the example of the radio communication device of transmitter illustrates.
[first embodiment]
Fig. 1 is a block diagram, is used to illustrate the configuration according to the transmitter of the first embodiment of the present invention.The transmission part 10 that realizes the transmitter of first embodiment comprises linear modulator 11, be used for to the transmission signal from linear modulator 11 outputs carry out power amplification high power amplifier 12, be used to generate the Modulation and Amplitude Modulation part 13 of the power that offers high power amplifier 12.
Linear modulator 11 comprises: fixed clock input DA transducer (DAC) 14 and 15 is used for the operating clock combine digital-analog-converted according to fixed frequency; Low pass filter (LPF) 16 and 17; Quadrature modulator (MOD) 18 is used on the output frequency of local oscillator 20 output of low pass filter 16 and 17 is carried out quadrature modulation and carried out frequency inverted to the RF wave band; And intermediate power amplifier 19, the output that is used to amplify quadrature modulator 10.
Modulation and Amplitude Modulation part 13 comprises fixed clock input DA transducer 21, low pass filter 22, comprises the power supply driver 24 that is used for carrying out at output the high speed operation amplifier (OPAMP) 23 of waveform shaping.Fixed clock input DA transducer 21 and low pass filter 22 become to sending the importation of output control signal, are used to import the transmission output control signal of describing later.
Sending part 10 has: with the I input 31 of phase constituent input; The Q input 32 of quadrature phase composition input; R input 33 is used to import send and exports the transmission power output of control signal with the specified control target; Gain controlling terminal 34 is used for the gain amplifier of input gain control signal with control intermediate power amplifier 19; And be used to export output 35 through the transmission signal of power amplification.Control section 30 is connected to each terminal and output sends modulation signal and various control signals etc. with the control wireless communication operation.Control section 30 comprises: magnitude determinations part 302 is used for the amplitude composition based on I signal and Q signal calculating input modulating signal; Model selection part 300 is used for selecting given level and else sends output control signal 301 and any of the amplitude composition of the input modulating signal that calculated by magnitude determinations part 302, with select operating mode.
In sending part 10, the homophase envelope composition (I signal) and the quadrature envelope composition (Q signal) of the quadrature modulation digital signal of the base band that will send are input to I input 31 and Q input 32 respectively.The I signal that will be input to the same phase constituent of I input 31 by DA transducer 14 is converted to aanalogvoltage, and remove the unnecessary harmonic components of aanalogvoltage by low pass filter 16, then, the I signal that converts aanalogvoltage to is input in the quadrature modulator 18.Similarly, the Q signal that will be input to the orthogonal component of Q input 32 by DA transducer 15 is converted to aanalogvoltage, and remove the unnecessary harmonic components of aanalogvoltage by low pass filter 17, then, the Q signal that converts aanalogvoltage to is input in the quadrature modulator 18.
The quadrature modulator 18 corresponding with the example of quadrature modulation apparatus utilizes the I signal of input and Q signal that the high-frequency signal that provides from local oscillator 20 is carried out quadrature modulation, generates and export the high-frequency signal of process according to the RF wave band of the phase modulated of I signal and Q signal thus.The intermediate power amplifier 19 corresponding with the example of variable gain amplifying apparatus amplifies the output signal of quadrature modulator 18 by predetermined gain in response to the rank of the gain control signal of importing from gain controlling terminal 34.The output of intermediate power amplifier 19 becomes the output of linear modulator 11, and it is imported in the high power amplifier 12 as sending modulation signal.
To be used to send the digital signal of exporting control and be input to R input 33 from control section 30.The transmission output control signal that will be input to R input 33 by DA transducer 21 is converted to aanalogvoltage, and remove the unnecessary harmonic components of aanalogvoltage by low pass filter 22, then, on current capacity, increase the transmission that converts aanalogvoltage to by power supply driver 24 and export control signal to strengthen.The output of power supply driver 24 becomes the output of Modulation and Amplitude Modulation part 13, and its power supply that can change as voltage offers high power amplifier 12.
The high power amplifier 12 corresponding with the example of power amplifier device is the power amplifiers that are made of multistage amplifier circuit, and for example, as shown in the figure, the output of this power amplifier is in response to controlled as the input rank of the power supply terminal 25 of exporting the control input end.Carry out power amplification, 12 pairs of high power amplifiers from the transmission modulation signals of linear modulator 11 outputs carry out following linear model down linear amplification or the Modulation and Amplitude Modulation under the saturation mode (polar coordinate modulated) carrying out power amplification, and from the signal of output 35 outputs as the transmission signals.
In this embodiment, if the transmission power output is the low output less than predetermined value, for example in order to use the transmitter of its output less than maximum transmit power, then other transmission output control signal 301 of given level optionally is input to R input 33 by model selection part 300, and under linear model operation linear modulator 11 and high power amplifier 12, be independent of thus based on the dynamic range of the amplitude composition of the input modulating signal of I signal and Q signal and carry out transmission power control.On the other hand, if send power output is the height output that is equal to or greater than predetermined value, for example near maximum transmit power (for example,-2 to 4dB or within-6dB) use transmitter, then under saturation mode, move high power amplifier 12, and optionally be input to R input 33 by the amplitude composition that magnitude determinations part 302 calculates by model selection part 300, and in high power amplifier 12, carried out polar coordinate modulated based on the input modulating signal of I signal and Q signal.In other words, the transmission part 10 of this embodiment comprises two stage amplifying devices, and promptly linear modulator 11, is used for carrying out after quadrature modulation linear amplification, high power amplifier 12, the amplification under the saturation condition that is used to carry out common linear amplification or use polar coordinate modulated.By control signal control amplifying device from control section 30.
Below, will go through the operation of above-mentioned transmission part 10.In the following description, as an example with the EGPRS system of the 900MHz wave band of European mobile phone standard.
Fig. 2 shows the figure of the transmission power control standard in the EGPRS system of the 900MHz of European mobile phone standard wave band.At first, will other power control operation of each power level control shown in Fig. 2 be discussed.In the EGPRS of 900MHz wave band system, in the classification that is called E2 class (ClassE2) in the regulation of maximum transmit power, need change rank from other 8 to 19 the step-lengths of power level control (step) with 2dB.In the terminal of radio communication device (mobile radio station), considered that before beginning to transmit from the order of base station, the base band control section is to sending part with 12 stages other controlling value of (step) transmission power control level.In the example of Fig. 2, suppose output 35 in transmission shown in Figure 1 part between the antenna terminal, the loss of antenna switching etc. is 1dB.
In Fig. 2, from power level control other 8 (+28dBm) to rank 10 (+24dBm), utilization is fixed as+5dBm from the gain control signal of the gain controlling terminal 34 input output rank with intermediate power amplifier 19, and the input rank of high power amplifier 12 remained in the operated in saturation district operation high power amplifier 12 in saturation mode (polar coordinate modulated system) thus.At this moment, the magnitude of voltage of the amplitude composition of modulation signal is imported into R input 33 in the level range in response to the conversion of the other institute of power level control.By power supply driver 24 power supply is offered high power amplifier 12, the voltage of the power supply terminal 25 of this high power amplifier 12 (supply voltage VDD) is carried out high-efficiency polar coordinate modulation thus by Modulation and Amplitude Modulation.
Be lower than other power level control of above-mentioned level other 11 (+22dBm) in, the expectant control magnitude of voltage is input to R input 33, and the supply voltage VDD of the power supply terminal 25 of high power amplifier 12 is fixed as 0.99 volt, and utilize from the gain control signal of the gain controlling terminal 34 inputs output rank with intermediate power amplifier 19 and be reduced to-4dBm, in linear model (1-Q modulation systems), move high power amplifier 12 thus.Like this, from power level control other 11 (+22dBm) to rank 19 (+6dBm), utilization is from the gain control signal of the gain controlling terminal 34 input output rank with intermediate power amplifier 19, the input rank of high power amplifier 12 just, be set to-4dBm, be used for the input rank of high power amplifier 12 is remained on linear operating region, thus operation high power amplifier 12 in linear model.At this moment, will be input to R input 33 in response to other control magnitude of voltage of power level control, and not change the supply voltage VDD of power supply terminal 25, carry out transmission power control thus in response to power level control.
The operation of the high power amplifier 12 under linear model and saturation mode is discussed with reference to Fig. 3 and Fig. 4 below.Fig. 3 shows the figure of the I/O characteristic (Pin-Pout characteristic) of high power amplifier 12, wherein with the supply voltage VDD that is applied to power supply terminal 25 as parameter, Fig. 4 be when the power input rank with high power amplifier 12 be fixed as+during 5dBm supply voltage VDD to the performance plot of power output Pout.
In Fig. 3, the indication of many curves is about the I/O characteristic (Pin-Pout characteristic) of the high power amplifier 12 of different supply voltage VDD.If with respect to as each the supply voltage VDD among Fig. 3, input power Pin is less, then power output Pout is along with input power Pin increases and increase (linear operating region) linearly, but, if input power Pin is equal to or greater than a value, among the power output Po (operated in saturation district) of then saturated appearance in response to each supply voltage VDD.Saturation output power Po (W) and supply voltage VDD's is square proportional.High power amplifier 12 operate in linear model still be saturation mode be that input rank by high power amplifier 12 is the output rank decision of intermediate power amplifier 19.
In the I/O characteristic of Fig. 3, for example, if the input rank of high power amplifier 12 is set to+5dBm, then high power amplifier 12 operates in the operated in saturation district.At this moment, in the level range of known rank institute conversion in response to power, the magnitude of voltage of the amplitude composition of modulation signal is imported into R input 33, supply voltage VDD to power supply terminal 25 carries out Modulation and Amplitude Modulation thus, carry out polar coordinate modulated, and carry out high efficiency power amplification and control transmitted power simultaneously.
In the case, for example, on power level control other 8, if the input rank of high power amplifier 12 is decided to be+5dBm, then in 0.31 volt to 1.96 volts scope, change the supply voltage VDD of power supply terminal 25 and it carried out Modulation and Amplitude Modulation, obtained as the output stage of high power amplifier 12 other, be about+modulation amplifying signal that 15dBm changes in+31dBm the scope.Like this, operation high power amplifier 12 in the operated in saturation district, and carry out polar coordinate modulated, can amplify input modulating signal with high efficiency thus.The control range of supply voltage VDD under the saturation mode is 0.31 volt to 1.96 volts when the voltage control rank is 8, is 0.25 volt to 1.56 volts when the voltage control rank is 9, perhaps the voltage control rank be 10 o'clock be 0.20 volt to 1.24 volts; Each is the amplitude dynamic range of modulation signal (approximately 16dB) no better than all.
On the other hand, in the I/O characteristic of Fig. 3, for example, if the input rank of high power amplifier 12 is set to-4dBm, then high power amplifier 12 operates in the linear operating region.At this moment, for example, on power level control other 11, if the supply voltage VDD of power supply terminal 25 is fixed to 0.99 volt, and input then obtains the amplifying signal that average output rank is approximately 22dBm from high power amplifier 12 by the orthogonal demodulation signal of quadrature modulator 18 and intermediate power amplifier 19.Like this, finish drilling at linear model and to make high power amplifier 12, and do not change the supply voltage VDD of power supply terminal 25 in response to power level control, the amplitude dynamic range that can be independent of modulation signal is thus carried out transmission power control (being about 16dB).
In the description that provides in the above, the transmission power control that is used at linear model operation high power amplifier 12 is to utilize from the transmission output control signal of R input 33 inputs to carry out, and carries out as sending the output control signal but also can use from the gain control signal of gain controlling terminal 34 inputs.
High power amplifier with Fig. 3 and I/O characteristic shown in Figure 4 is to switch between saturation mode and linear model than the rank of the low 4dB of maximum transmit power, this is because the gain-variable width approximately only is 20dB, and the amplitude dynamic range of the modulation signal of EGPRS system is about 16dB, but the present invention is not limited thereto.For maximum transmit power value-4dB, if the gain-variable width of high power amplifier is big, then 4dB or bigger can be set, if the gain-variable width is little, then 4dB or littler can be set.
In Fig. 1, as example, the whole power supplys on three grades of high power amplifier are connected to a bit, change in response to the supply voltage small signal gain in the range of linearity as shown in Figure 3; Yet, only change the supply voltage on one-level in the end or the last two-stage, if supply voltage changes, small signal gain does not change.In the case, can carry out gain controlling under the linear model by the output of control intermediate power amplifier.
Like this, in first embodiment, in the high frequency power amplifier that sends part, near the maximum output of power consumption maximum, carry out high-efficiency polar coordinate modulation, and, thus, can strengthen output control variable-width in the enterprising line linearity amplification of lower output rank.Also easily becoming possibility as the transmission power control at the wide region above the gain-variable width in the described high power amplifier of top example.Thereby, only when near maximum transmit power, using transmitter, just carry out polar coordinate modulated, can carry out polar coordinate modulated and transmission power control respectively thus, can alleviate the dynamic range shortage in the polar coordinate modulated system, and can contain large-scale output rank.
(second embodiment)
Fig. 5 is a block diagram, shows the configuration of transmitter according to a second embodiment of the present invention.In the part configuration, the transmission part 40 of second embodiment is different from the transmission part of first embodiment; Changed the configuration of Modulation and Amplitude Modulation part, clock switched terminal 36 is provided, and made and to come the control operation electric current by the operating clock that changes the DA transducer.
Modulation and Amplitude Modulation part 41 comprises V-CLK input DA transducer (DAC) 42, and it can be according to coming the comfortable switching signal that sends the clock switched terminal 36 in the output control signal importation to change operating clock.Similar among other assembly and first embodiment, and the similar assembly that is denoted by the same reference numerals are no longer discussed at this.
V-CLK input DA transducer 42 with operating clock handoff functionality can change operating clock in response to the input of the switching signal from control section 30 to clock switched terminal 36, and can change operating current according to the frequency of operating clock.
Because transmission power control speed changes speed less than the amplitude of modulation signal usually, so when carrying out quadrature modulation and linear amplification under linear model when, DA transducer 42 does not need high operating clock.Like this, can only when carrying out polar coordinate modulated, just operate DA transducer 42 with high operating clock.Therefore, when operation high power amplifier 12 in saturation mode when carrying out polar coordinate modulated, the operating current that increases V-CLK input DA transducer 42 also improves operating clock.On the other hand, make high power amplifier 12 when finishing drilling when carrying out quadrature modulation and linear amplification, reduce the operating current of V-CLK input DA transducer 42 and reduce operating clock at linear model.
Like this, according to second embodiment, only when carrying out polar coordinate modulated, just improve the operating clock of V-CLK input DA transducer 42 and increase operating current, the advantage in first embodiment, the operating current in the time of can also reducing linear mode operation also can reduce overall power consumption thus.
(the 3rd embodiment)
Fig. 6 is a block diagram, is used to illustrate the configuration of the transmitter of a third embodiment in accordance with the invention.The transmission part 50 of the 3rd embodiment is different from the transmission part of second embodiment in the part configuration; Changed the configuration of Modulation and Amplitude Modulation part, current switching terminal 37 is provided, and the feasible operating current that can control the high speed operation amplifier of power supply driver.
Modulation and Amplitude Modulation part 51 has the power supply driver 53 that comprises high speed operation amplifier (OPAMP) 52, and this high speed operation amplifier (OPAMP) 52 can change operating current according to the switching signal from the current switching terminal 37 in the importation.Similar among other assembly and first and second embodiment, the similar assembly that is denoted by the same reference numerals is no longer discussed at this.
High speed operation amplifier 52 with operating current handoff functionality can change operating current in response to the input of the switching signal from control section 30 to current switching terminal 37.
Because transmission power control speed is usually less than the amplitude change speed of modulation signal usually, therefore, when carrying out quadrature modulation and linear amplification under linear model, the high speed operation amplifier that is used for waveform shaping 52 at the input stage place of power supply driver 53 does not need big operating current.Like this, only when carrying out polar coordinate modulated, just operate high speed operation amplifier 52 with big operating current.Thereby, when operation high power amplifier 12 under saturation mode increases the operating current of high speed operation amplifier 52 when carrying out polar coordinate modulated; Make high power amplifier 12 when finishing drilling when carrying out quadrature modulation and linear amplification, reduce the operating current of high speed operation amplifier 52 at linear model.
Like this,, only when carrying out polar coordinate modulated, just increase the operating current of high speed operation amplifier 52 according to the 3rd embodiment, the operating current in the time of can reducing linear mode operation thus, and can reduce overall power consumption more than second embodiment.
(the 4th embodiment)
Fig. 7 is a block diagram, is used to illustrate the configuration of the transmitter of a fourth embodiment in accordance with the invention.The transmission part 60 of the 4th embodiment is different from the transmission part of second embodiment in the part configuration; Changed the configuration of Modulation and Amplitude Modulation part and high power amplifier, the feasible output control of carrying out high power amplifier by biasing adjustment rather than supply voltage.
Modulation and Amplitude Modulation part 61 comprises V-CLK input DA transducer 42 and low pass filter 22.High power amplifier 62 comprises power supply terminal 63, is used for also comprising bias terminal 64 from fixed power source 65 input supply voltages, is used to import the transmission output control signal (gain control signal) from 61 outputs of Modulation and Amplitude Modulation part.In this embodiment, the bias terminal 64 in the high power amplifier 62 becomes and is the output control input end.Similar among other assembly and first embodiment, the similar assembly that is denoted by the same reference numerals is no longer discussed at this.
In high power amplifier 62, the drain electrode of amplifier element or collector electrode become power supply terminal 63, and grid or base stage become bias terminal 64.In this configuration, transmission power control when working as the execution polar coordinate modulated by the gain control signal that is input to bias terminal 64, and compare with the situation of directly carrying out transmission power control by the power supply that is input to power supply terminal 63 like this, Modulation and Amplitude Modulation part 61 does not need to comprise in order to strengthen the power supply driver of source current capacity.
When high power amplifier 62 amplifies input modulating signal from linear modulator 11, fixing supply voltage is provided to power supply terminal 63 from fixed power source 65, and will be input to bias terminal 64, and adjust the output rank from other gain control signal of fix level or the modulation signal of amplitude modulating part 61.
In above-mentioned example, DA transducer 42 at the input stage place of Modulation and Amplitude Modulation part 61 makes and can change operating clock and operating current by the switching signal of coming self-clock switched terminal 36, but can be as fixed clock input DA transducer 21 is provided among first embodiment, so that operate with fixing operating clock.
Like this, according to the 4th embodiment, transmission power control is carried out in biasing adjustment by high power amplifier, compare with the Circuits System in first to the 3rd embodiment thus and can eliminate the needs that in Modulation and Amplitude Modulation part, strengthen the source current capacity, and can further simplify circuit with power supply driver.
(the 5th embodiment)
Fig. 8 is a block diagram, is used to illustrate the configuration of radio communication device according to a fifth embodiment of the invention.The radio communication device of the 5th embodiment comprise with the 3rd embodiment in similar transmission part 50, receiving unit 70, control section 80, duplexer 81, antenna 82.
Receiving unit 70 comprises the demodulation part, and comprises: band pass filter (BPF) 71; Be used to adjust other low noise amplifier 72 of output stage of band pass filter 71; Quadrature demodulator (DEM) 73 is used to utilize the high-frequency signal of local oscillator 20 that quadrature demodulation is carried out in the output of low noise amplifier 72 and carries out frequency inverted to base band; Baseband amplifier (BBAMP) 74 and 75 is used for amplifying respectively the same phase constituent and the orthogonal component of the output of quadrature demodulator 73; Low pass filter 76 and 77; And the AD converter 78 and 79 that is used to carry out analog-digital conversion.
Receiving unit 70 has: with the I output 91 of phase constituent output; The Q output 92 of orthogonal component output; And gain controlling terminal 93, be used for the input gain control signal, with the gain amplifier of control low noise amplifier 72.
In the 5th embodiment, the output that sends part 50 is by receiving unit 70 monitoring, and based on information and executing that restituted signal provided when the polar coordinate modulated amplitude information and the timing (timing) of phase information adjust.Like this, provide the operator scheme that wherein can transmit-receive simultaneously operation, even for not relating to the tdma system that transmission-reception operates simultaneously, also be like this.
Switched antenna switch 81 to be being connected to receiving unit 70 with duplexer 82, and cuts down the output (being about 20dB usually) that sends part 50 according to the isolation characteristic of duplexer 81, and sends it to band pass filter 71.In band pass filter 71, in the TDD system that uses identical frequency to send and receive with use between the FDD system that frequency separately sends and receive, big attenuation difference occurred, and further weakened the output that sends part 50.In low noise amplifier 72, by adjusting gain, and the output of band pass filter 71 is cut on the rank that can not make quadrature demodulator 73 distortions from the gain control signal of gain controlling terminal 93.Quadrature demodulator 73 uses from the high-frequency signal of local oscillator 20 inputs identical with sending part 50 to come the output signal of low noise amplifier 72 is carried out quadrature demodulation, and baseband amplifier 74 and 75 amplifies the same phase constituent (I signal) and the orthogonal component (Q signal) of the output signal of quadrature demodulator 73 respectively.I signal and Q signal are removed unnecessary harmonic components by low pass filter 76 and 77 respectively, then, respectively I signal and Q signal are converted to digital signal with output by AD converter 78 and 79.
In above-mentioned example, local oscillator 20 is by sending and receiving shared; Yet, for the present invention is applied to need local oscillator to send and receive have derived reference signal in the same manner individually system such as W-CDMA, do not need to make that this circuit is shared, and only need make frequency of oscillation identical.
Like this, according to the 5th embodiment, make the amplitude information when can carry out polar coordinate modulated and the timing adjustment of phase information according to the information of restituted signal, wherein this restituted signal is to be connected to the output that receiving unit 70 and demodulation send part 50 by the output that utilizes duplexer 81 will send part 50 to provide, and compares the distortion that can reduce further in sending part with the 3rd embodiment.
(the 6th embodiment)
Fig. 9 is a block diagram, is used to illustrate the configuration of radio communication device according to a sixth embodiment of the invention.The radio communication device of the 6th embodiment comprises transmission part 60, receiving unit 70, control section 80, duplexer 81 and the antenna 82 similar to the 4th embodiment.That is, the transmission among the 5th above-mentioned embodiment is partly changed into the transmission part 60 of as among the 4th embodiment, carrying out the output control of high power amplifier by biasing adjustment.The configuration of receiving unit 70 and control section 80 with the operation to the 5th embodiment in similar, no longer discussed at this.
When carrying out polar coordinate modulated, work as the transmission power control of the transmission part 60 when carrying out polar coordinate modulated by being input to gain control signal in the bias terminal 64, and compare by being input to the situation that power supply in the power supply terminal 63 directly carries out transmission power control like this with directly, Modulation and Amplitude Modulation part 61 does not need to comprise in order to strengthen the power supply driver of source current capacity.
In above-mentioned example, make at the DA transducer of the input stage of Modulation and Amplitude Modulation part 61 and can change operating clock and operating current by the switching signal of coming self-clock switched terminal 36, but can be as fixed clock input DA transducer 21 is provided among first embodiment, so that operate with fixing operating clock.
Like this, according to the 6th embodiment, carry out transmission power control by the biasing adjustment of high power amplifier, can eliminate the needs that in the Modulation and Amplitude Modulation part, strengthen the source current capacity thus with power supply driver, and except the advantage of the 5th embodiment and, can also further simplify circuit.
(the 7th embodiment)
Figure 10 is a block diagram, is used to illustrate the configuration of the transmitter of the seventh embodiment of the present invention.The transmission part 200 of the 7th embodiment is different from the transmission part of first embodiment in the part configuration; Changed the configuration of the power supply driver 203 of Modulation and Amplitude Modulation part 201.Power supply driver 203 comprises: amplitude limit (amplitude slice) device 204 is used for exporting control signal amplitude limit (slice) with the different voltage level of segmentation (stepwise) to sending; Linear regulator 207; Voltage source 210; Switching regulaor (switching regulator) 208 and 209 is used for the supply voltage of voltage source 210 is converted to the voltage with segmentation different value; Switches set 205 and 206 is used for any one of output voltage of selector switch adjuster 208 and 209.Similar among other assembly and first embodiment, the similar assembly that is denoted by the same reference numerals is no longer discussed at this.
The output of low pass filter 22 is divided into two branches, and these two branches are input to amplitude limiter 204 and linear regulator 207.Amplitude limiter 204 is with the output violent change of the different tapping voltage rank of segmentation to low pass filter 22, and each switching regulaor 208 that all is implemented as DC-DC transducer etc. converts the voltage with the different value of segmentation (stepwise differentvalue) to 209 supply voltages with voltage source 210.In linear regulator 207, difference between the output of the output of voltage source 210 and low pass filter 22 becomes a loss, but, if low pass filter 22 is low, then select its output voltage to be higher than and to approach most the switching regulaor of the output of low pass filter 22, loss is minimized by switches set 205,206.
Like this, according to the 7th embodiment, a plurality of switching regulaors and linear regulator are combined as power supply driver 203, can reduce the operating current when polar coordinate modulated thus, and, compare with first embodiment, can reduce overall power consumption more.
As mentioned above, according to this embodiment, can near the maximum output of power consumption maximum, be independent of and carry out high-efficiency polar coordinate modulation with transmission power control ground.Only when near maximum transmit power, using this device, just carry out polar coordinate modulated, slow down the dynamic range shortage of the performance that depends on power amplifier thus, and can strengthen output control variable-width and carry out simultaneously according to the power output efficiently of polar coordinate modulated system and amplify.
In the above-described embodiment, show the situation of mobile phone that the present invention is used for the 900-MHz wave band EGRPS system of European mobile phone standard by way of example, still, the present invention is not limited to this situation.The present invention also can be applied to GSM, W-CDMA etc. various mobile phones, other wireless terminal, radio base station apparatus, be used for the transmission part of radio communication device etc. as the WLAN (wireless local area network) of IEEE802.11a, 802.11b.
Although describe the present invention in detail, obviously to those skilled in the art,, can carry out various changes and modifications without departing from the spirit and scope of the present invention with reference to specific embodiment.
The present patent application specification is based on the Japanese patent application book No.2004-352464 of Japanese patent application book No.2004-017955 that submitted on January 27th, 2004 and submission on December 6th, 2004, and existing its content by reference all is contained in this.
Utilizability on the industry
Of the present invention have a following advantage, and it can provide a transmitting portion, and this transmitting portion can be with height Efficient provides wide output control variable-width, and can be used for controlling changeably the transmission of its output The radio communication device of device and this transmitter of use.
Claims (11)
1. transmitter comprises:
Quadrature modulation apparatus is used to import the same phase constituent and the orthogonal component of input modulating signal, and carries out quadrature modulation;
Variable gain amplifying apparatus is used to utilize the output of amplifying this quadrature modulation apparatus based on the gain of gain control signal control; And
Power amplifier device is used for power amplification is carried out in the output of this variable gain amplifying apparatus;
Wherein, this power amplifier device has and is used for utilizing the linear operating region of I/O power characteristic to carry out the linear model of power amplification, and the saturation mode that is used for utilizing the operated in saturation district of I/O power characteristic to carry out power amplification, and
Wherein, be equal to or greater than predetermined value if send power output, then adjust the output rank of this variable gain amplifying apparatus, this power amplifier device of operation under saturation mode, and will be input to the output control input end of this power amplifier device to carry out polar coordinate modulated by amplitude-modulated transmission output control signal based on the amplitude composition of this input modulating signal; If send power output less than predetermined value, then adjust the output rank of this variable gain amplifying apparatus, finish drilling at linear model and to make this power amplifier device, and will have and export control signal in response to the transmission of the intended level of this transmissions power output and be input in this output control input end to carry out linear amplification.
2. according to the transmitter of claim 1,
Wherein, if send that power output is in maximum output rank or in maximum output stage near other, then this power amplifier device carries out polar coordinate modulated, if and send power output less than this maximum output rank or should the maximum output stage be worth near other, then this power amplifier device carries out linear amplification.
3. according to the transmitter of claim 1 or 2,
Wherein, this power amplifier device comprises the power supply terminal as this output control input end;
Wherein, this transmitter also comprises power supply driver, this power supply driver be used to increase the signal of intended level or based on the amplitude composition of this input modulating signal by the current capacity of amplitude-modulated signal, and provide power supply as this transmission output control signal to this power supply terminal.
4. according to the transmitter of claim 1 or 2,
Wherein, this power amplifier device comprises:
Power supply terminal is to the fixing power supply of its input; And
As the amplifying circuit bias terminal of this output control input end, import this transmission output control signal to this amplifying circuit bias terminal.
5. according to each transmitter in the claim 1 to 4, also comprise and send output control signal importation, be used to import this transmission output control signal, wherein this transmission output control signal importation comprises the DA transducer that is used for digital signal is converted to analog signal
Wherein, this DA transducer can change operating clock and have the operating clock handoff functionality, is used for only when just utilizing the operating clock higher than the operating clock when carrying out linear amplification to operate when power amplifier device carries out polar coordinate modulated.
6. according to the transmitter of claim 3 or 5,
Wherein, the importation of this power supply driver comprises the operational amplifier that is used for waveform shaping, and
Wherein, this operational amplifier can change operating current, and has the operating current handoff functionality, is used for only when just increase operating current than the operating current when carrying out linear amplification when power amplifier device carries out polar coordinate modulated.
7. according to the transmitter of claim 3 or 5,
Wherein, this power supply driver is a linear regulator.
8. according to the transmitter of claim 3 or 5,
Wherein, this power supply driver is a switching regulaor.
9. according to the transmitter of claim 3 or 5,
Wherein, this power supply driver comprises:
Amplitude limiter is used for the different voltage level of segmentation the control signal amplitude limit being exported in this transmission;
A plurality of switching regulaors are used for converting supply voltage to the different value of segmentation voltage: and
Switches set is used for selecting any one of output voltage of these a plurality of switching regulaors.
10. according to each transmitter of claim 1 to 9, this transmitter also comprises:
The demodulation part is used for the output of this power amplifier device of demodulation; And
Control section, the information that the restituted signal that provides based on this demodulation section branch is provided is when adjust amplitude-modulated timing when this power amplifier device carries out polar coordinate modulated.
11. a radio communication device comprises as each the described transmitter in the claim 1 to 10.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004017955 | 2004-01-27 | ||
| JP017955/2004 | 2004-01-27 | ||
| JP352464/2004 | 2004-12-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1914810A true CN1914810A (en) | 2007-02-14 |
| CN100586031C CN100586031C (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200580003297A Expired - Fee Related CN100586031C (en) | 2004-01-27 | 2005-01-11 | Transmitter and wireless communication apparatus |
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| Country | Link |
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| CN (1) | CN100586031C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018145368A1 (en) * | 2017-02-13 | 2018-08-16 | 华为技术有限公司 | Voltage control method and terminal |
| CN111726140A (en) * | 2020-06-19 | 2020-09-29 | 维沃移动通信有限公司 | Power amplifier control method and device, WIFI radio frequency circuit and electronic equipment |
| CN111756344A (en) * | 2020-06-17 | 2020-10-09 | 维沃移动通信有限公司 | Control method and control device of power amplification module and electronic equipment |
| CN111756344B (en) * | 2020-06-17 | 2024-04-19 | 维沃移动通信有限公司 | Control method and control device of power amplification module and electronic equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2800278B1 (en) | 2011-12-20 | 2016-05-04 | Telefonaktiebolaget LM Ericsson (publ) | Transmitter, transceiver, communication device, method and computer program |
-
2005
- 2005-01-11 CN CN200580003297A patent/CN100586031C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018145368A1 (en) * | 2017-02-13 | 2018-08-16 | 华为技术有限公司 | Voltage control method and terminal |
| CN109075749A (en) * | 2017-02-13 | 2018-12-21 | 华为技术有限公司 | A kind of voltage control method and terminal |
| CN109075749B (en) * | 2017-02-13 | 2021-06-15 | 华为技术有限公司 | Voltage control method and terminal |
| CN111756344A (en) * | 2020-06-17 | 2020-10-09 | 维沃移动通信有限公司 | Control method and control device of power amplification module and electronic equipment |
| CN111756344B (en) * | 2020-06-17 | 2024-04-19 | 维沃移动通信有限公司 | Control method and control device of power amplification module and electronic equipment |
| CN111726140A (en) * | 2020-06-19 | 2020-09-29 | 维沃移动通信有限公司 | Power amplifier control method and device, WIFI radio frequency circuit and electronic equipment |
| CN111726140B (en) * | 2020-06-19 | 2022-06-10 | 维沃移动通信有限公司 | Power amplifier control method and device, WIFI radio frequency circuit and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100586031C (en) | 2010-01-27 |
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