CN102217262B - Method for transmitting radio frequency signals and base station device - Google Patents
Method for transmitting radio frequency signals and base station device Download PDFInfo
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- CN102217262B CN102217262B CN201180000857.8A CN201180000857A CN102217262B CN 102217262 B CN102217262 B CN 102217262B CN 201180000857 A CN201180000857 A CN 201180000857A CN 102217262 B CN102217262 B CN 102217262B
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Abstract
The invention embodiment provides a method for transmitting radio frequency signals and a base station device. The method allows a first radio frequency output signal to be transmitted by controlling the energy of a first radio frequency input signal of the PA and couples partial feedback of the first radio frequency output signal to a pre-distortion system, thereby allowing the control over the energy increase of the second radio frequency input signal input to PA according to the preset energy increase. The invention embodiment can realize correction to the inter-modulation component of theradio frequency output signals transmitted at the PA initial phase (start-up phase), thus to improve linearity of the PA initial phase.
Description
Technical field
The embodiment of the invention relates to the communication technology, relates in particular to launching technique and the base station equipment of radiofrequency signal.
Background technology
Power amplifier (Power Amplifier is called for short PA) is most important device in the communication system, has unintentional nonlinearity.In order to obtain the high efficiency reasonable power amplifier of the linearity simultaneously, can adopt pre-distortion technology (numeral or simulation) to proofread and correct the inter-modulated signal of the radio frequency output signal correspondence of PA emission usually.
Yet, because pre-distortion system is a corrective system with feedback character, so need earlier to obtain intermodulation (InterModulation Distortion in the radio frequency output signal of PA output by feedback path, abbreviation IMD) after the component, could obtain pre-distortion parameters, and then can make the signal after overcorrect be input to PA, proofread and correct with the intermodulation component in the radio frequency output signal that realizes PA is exported, caused and to have proofreaied and correct the intermodulation component in the radio frequency output signal of PA starting stage (startup stage of being) output, made that the linearity of PA starting stage is relatively poor.
Summary of the invention
The embodiment of the invention provides launching technique and the base station equipment of radiofrequency signal, in order to improve the linearity of PA starting stage.
One aspect of the present invention provides a kind of launching technique of radiofrequency signal, comprising:
The energy of first radio-frequency input signals of control input PA, so that the difference between the energy of the energy of the useful component in the first radio frequency output signal that described PA exports after described first radio-frequency input signals is amplified and intermodulation component is greater than the energy threshold that sets in advance, wherein, the energy of the useful component in the described first radio frequency output signal is less than the target energy of radio frequency output signal;
Launch the described first radio frequency output signal, and the part in the described first radio frequency output signal that is coupled feeds back to pre-distortion system;
According to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases, so that the energy of the useful component in the second radio frequency output signal that final described PA exports after described second radio-frequency input signals is amplified is increased to the target energy of described radio frequency output signal, wherein, described second radio-frequency input signals is the signal after proofreading and correct through described pre-distortion system;
Launch the described second radio frequency output signal, and the part in the described second radio frequency output signal that is coupled feeds back to described pre-distortion system.
The present invention provides the launching technique of another kind of radiofrequency signal on the other hand, comprising:
By power amplifier PA the radio-frequency input signals of input is amplified, and output radio frequency output signal, difference between the energy of the useful component in the described radio frequency output signal and the energy of intermodulation component is greater than the energy threshold that sets in advance, wherein, described radio-frequency input signals is the signal after proofreading and correct according to described initial pre-distortion parameters through the pre-distortion system that disposes initial pre-distortion parameters;
Launch described radio frequency output signal, and the part in the described radio frequency output signal that is coupled feeds back to described pre-distortion system, in order to upgrade the pre-distortion parameters of described pre-distortion system.
The present invention provides the launching technique of another radiofrequency signal on the other hand, comprising:
Export first radio frequency after control PA amplifies first radio-frequency input signals of importing and output signal to the rf load that sets in advance;
Part in the described first radio frequency output signal that is coupled feeds back to pre-distortion system;
Control described PA and second radio-frequency input signals of input is exported second radio frequency after amplifying output signal to antenna, wherein, described second radio-frequency input signals is the signal after proofreading and correct through described pre-distortion system;
Launch the described second radio frequency output signal, and the part in the described second radio frequency output signal that is coupled feeds back to described pre-distortion system.
The present invention also provides a kind of base station equipment on the other hand, comprising:
Control unit, the energy that is used for first radio-frequency input signals of control input PA, so that the difference between the energy of the energy of the useful component in the first radio frequency output signal that described PA exports after described first radio-frequency input signals is amplified and intermodulation component is greater than the energy threshold that sets in advance, wherein, the energy of the useful component in the described first radio frequency output signal is less than the target energy of radio frequency output signal, and according to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases, so that the energy of the second radio frequency output signal that final described PA exports after described second radio-frequency input signals is amplified is increased to the target energy of described radio frequency output signal, wherein, described second radio-frequency input signals is the signal after proofreading and correct through pre-distortion system;
Coupling unit, the part that is used for the described first radio frequency output signal of coupling and/or the described second radio frequency output signal feeds back to described pre-distortion system; Wherein, described pre-distortion system is used for according to the signal of described coupling unit feedback the signal of importing being carried out pre-distortion, to obtain described second radio-frequency input signals;
Transmitter unit is used for the described first radio frequency output signal of emission and/or the described second radio frequency output signal.
The present invention also provides another kind of base station equipment on the other hand, comprising:
Pre-distortion system disposes initial pre-distortion parameters;
Power amplifier PA, be used for the radio-frequency input signals of input is amplified, and output radio frequency output signal, difference between the energy of the useful component in the described radio frequency output signal and the energy of intermodulation component is greater than the energy threshold that sets in advance, wherein, described radio-frequency input signals is the signal after proofreading and correct according to described initial pre-distortion parameters through described pre-distortion system;
Transmitter unit is used for the described radio frequency output signal of emission;
Coupling unit, the part that is used for the described radio frequency output signal of coupling feeds back to described pre-distortion system, in order to upgrade the pre-distortion parameters of described pre-distortion system.
The present invention also provides another base station equipment on the other hand, comprising:
Control unit, being used for control PA exports first radio frequency after first radio-frequency input signals of input is amplified and outputs signal to the rf load that sets in advance, and control described PA and second radio-frequency input signals of input is exported second radio frequency after amplifying output signal to antenna, wherein, described second radio-frequency input signals is the signal after proofreading and correct through pre-distortion system;
Coupling unit, the part that is used for the described first radio frequency output signal of coupling and/or the second radio frequency output signal feeds back to described pre-distortion system; Wherein, described pre-distortion system is used for according to the signal of described coupling unit feedback the signal of importing being carried out pre-distortion, to obtain described second radio-frequency input signals;
Transmitter unit is used for the described second radio frequency output signal of emission.
As shown from the above technical solution, the embodiment of the invention can realize the intermodulation component in the radio frequency output signal of PA starting stage (startup stage of being) output is proofreaied and correct, thereby has improved the linearity of PA starting stage.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The schematic flow sheet of the launching technique of a kind of radiofrequency signal that Figure 1A provides for one embodiment of the invention;
A schematic diagram of PA output signal in the launching technique of a kind of radiofrequency signal that Figure 1B provides for one embodiment of the invention;
The schematic flow sheet of the launching technique of the another kind of radiofrequency signal that Fig. 2 provides for another embodiment of the present invention;
The schematic flow sheet of the launching technique of another radiofrequency signal that Fig. 3 provides for another embodiment of the present invention;
The structural representation of a kind of base station equipment that Fig. 4 provides for another embodiment of the present invention;
The structural representation of the another kind of base station equipment that Fig. 5 provides for another embodiment of the present invention;
The structural representation of another base station equipment that Fig. 6 provides for another embodiment of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
The schematic flow sheet of the launching technique of a kind of radiofrequency signal that Figure 1A provides for one embodiment of the invention, shown in Figure 1A, the launching technique of the radiofrequency signal of present embodiment can may further comprise the steps:
The energy of first radio-frequency input signals of step 101, control input PA is so that the difference between the energy of the energy of the useful component in the first radio frequency output signal that above-mentioned PA exports after above-mentioned first radio-frequency input signals is amplified and intermodulation component is greater than the energy threshold that sets in advance;
The energy of the useful component after wherein, above-mentioned PA amplifies above-mentioned first radio-frequency input signals in the first radio frequency output signal of output is less than the target energy of radio frequency output signal.
In this step, the energy of useful component can comprise multiple implementation less than the target energy of radio frequency output signal in the first radio frequency output signal that PA exports after first radio-frequency input signals of importing is amplified.For example: the energy of all carrier waves in the first radio frequency output signal is all less than the target energy of carrier wave; Again for example: the energy of the part carrier wave in the first radio frequency output signal (carrier wave or a plurality of carrier wave) is less than the target energy of carrier wave, and the energy of other carrier waves is equal to the target energy of carrier wave.
In this step, specifically can be by repeatedly experiment, determine suitable energy size, so that nonlinear distortion is less, thereby make the intermodulation component in the first radio frequency output signal of PA output can satisfy the requirement of intermodulation energy indexes, namely the difference between the energy of the energy of the useful component in the first radio frequency output signal and intermodulation component is greater than the energy threshold that sets in advance.
In this step, specifically can pass through the energy of the baseband signal of control baseband module emission, the energy of first radio-frequency input signals of control input PA; Perhaps can also be by the energy of control variable gain amplifier output, the energy of first radio-frequency input signals of control input PA, present embodiment does not limit this.
Step 102, the above-mentioned first radio frequency output signal of emission, and the part in the above-mentioned first radio frequency output signal that is coupled feeds back to pre-distortion system;
For example: by feedback path, the part in the above-mentioned first radio frequency output signal that is coupled feeds back to pre-distortion system.
The energy increment that step 103, basis set in advance, the energy of second radio-frequency input signals of the above-mentioned PA of control input increases, so that the energy of the useful component in the second radio frequency output signal that final above-mentioned PA exports after above-mentioned second radio-frequency input signals is amplified is increased to the target energy of above-mentioned radio frequency output signal;
Wherein, above-mentioned second radio-frequency input signals is the signal after proofreading and correct through above-mentioned pre-distortion system.
Wherein, if it is enough little that energy increment arranges, so can be so that the intermodulation component in the second radio frequency output signal that above-mentioned PA exports after above-mentioned second radio-frequency input signals is amplified can satisfy the requirement of intermodulation energy indexes, namely the difference between the energy of the energy of the useful component in the second radio frequency output signal and intermodulation component is greater than the energy threshold that sets in advance.
In this step, specifically can pass through the energy of the baseband signal of control baseband module emission, according to the energy increment that sets in advance, the energy increase of second radio-frequency input signals of the above-mentioned PA of control input; Perhaps can also pass through the energy of the signal of control variable gain amplifier output, according to the energy increment that sets in advance, the energy increase of second radio-frequency input signals of the above-mentioned PA of control input, present embodiment does not limit this.Like this, can make PA can export the radio frequency output signal that energy progressively increases, up to the target energy of the energy of the useful component in the radio frequency output signal of PA output being brought up to the radio frequency output signal that satisfies the communication system requirement.
Particularly, pre-distortion system is handled signal (baseband signal or radiofrequency signal) and specifically can be utilized this pre-distortion system first radio-frequency input signals to be amplified the pre-distortion parameters of the first radio frequency output signal acquisition of output afterwards according to the PA that obtains by feedback path, and/or the PA that obtains by feedback path second radio-frequency input signals is amplified after the pre-distortion parameters that obtains of the second radio frequency output signal of output, signal is proofreaied and correct, thereby realized second radio-frequency input signals is proofreaied and correct, so that nonlinear distortion is less, thereby make the intermodulation component in the second radio frequency output signal of PA output can satisfy the requirement of intermodulation energy indexes, namely the difference between the energy of the energy of the useful component in the second radio frequency output signal and intermodulation component is greater than the energy threshold that sets in advance.
Be understandable that, in the process that the energy of second radio-frequency input signals increases, the energy of second radio-frequency input signals can be progressively to raise, the also adjustment that can adapt to according to the situation of the second radio frequency output signal, for example: raise, reduce, raise, present embodiment does not limit this.
Step 104, the above-mentioned second radio frequency output signal of emission, and the part in the above-mentioned second radio frequency output signal that is coupled feeds back to above-mentioned pre-distortion system.
Alternatively, above-mentioned pre-distortion system can be digital pre-distortion (Digital Pre Distortion is called for short DPD) system.
Alternatively, above-mentioned pre-distortion system can also be analog predistortion (Analog Pre Distortion is called for short APD) system.
For the method that makes the embodiment of the invention provide is clearer, below will be with the radio frequency output signal of two carrier waves as an example.As shown in Figure 1B:
At first, PA input energy grade 1 () radio-frequency input signals for example: differ more than the 30dBc with the target energy of radio frequency output signal, at this moment, the nonlinear distortion of PA is less, and the intermodulation component in the radio frequency output signal of exporting after the radio-frequency input signals of the energy grade 1 of PA amplifies can satisfy the requirement of intermodulation energy indexes.Simultaneously, pre-distortion system amplifies the radio frequency output signal of output afterwards by the radio-frequency input signals that feedback path gets access to the energy grade 1 of PA, according to this radio frequency output signal, calculate and obtain pre-distortion parameters, the intermodulation component in the radio frequency output signal of PA output further can be improved.
Then, the radio-frequency input signals of the energy grade 2 that the PA input is handled through pre-distortion system (for example: energy increases 2dB), at this moment, the nonlinear distortion of PA increases before, but because the radio-frequency input signals of this energy grade 2 is proofreaied and correct through pre-distortion system, therefore, the intermodulation component in the radio frequency output signal exported after amplifying of the radio-frequency input signals of the energy grade 2 of PA can satisfy the requirement of intermodulation energy indexes.Simultaneously, pre-distortion system amplifies the radio frequency output signal of output afterwards by the radio-frequency input signals that feedback path gets access to the energy grade 2 of PA, according to this radio frequency output signal, calculate and obtain pre-distortion parameters, the intermodulation component in the radio frequency output signal of PA output further can be improved.
Then, the radio-frequency input signals of the energy grade 3 that the PA input is handled through pre-distortion system (for example: energy increases 2dB), at this moment, the nonlinear distortion of PA increases before, but because the radio-frequency input signals of this energy grade 3 is proofreaied and correct through pre-distortion system, therefore, the intermodulation component in the radio frequency output signal exported after amplifying of the radio-frequency input signals of the energy grade 3 of PA can satisfy the requirement of intermodulation energy indexes.Simultaneously, pre-distortion system amplifies the radio frequency output signal of output afterwards by the radio-frequency input signals that feedback path gets access to the energy grade 3 of PA, according to this radio frequency output signal, calculate and obtain pre-distortion parameters, the intermodulation component in the radio frequency output signal of PA output further can be improved.
According to above-mentioned flow process, progressively improve the energy of the radio-frequency input signals of PA input, the energy of the radio frequency output signal of output is increased to the target energy of radio frequency output signal after PA amplifies the radio-frequency input signals of importing, at this moment, the nonlinear distortion of PA further increases, but because the baseband signal of the radio-frequency input signals correspondence of PA input or radiofrequency signal are proofreaied and correct (also can be understood as, because the radio-frequency input signals of PA input is proofreaied and correct through pre-distortion system) through pre-distortion system.Therefore, the intermodulation component in PA the radio frequency output signal that the radio-frequency input signals of input is exported after amplifying can satisfy the requirement of intermodulation energy indexes.Like this, just can realize the intermodulation component in PA starting stage (startup stage of being) the output radio frequency output signal is proofreaied and correct, thereby improve the linearity of PA starting stage.
Need to prove: when improving the energy of radio-frequency input signals of PA input, can keep a period of time T, with obtaining pre-distortion parameters so that pre-distortion system calculates, above-mentioned time T can depend on the speed of service of pre-distortion system at every turn.
In the present embodiment, the energy of the radio-frequency input signals by control initial input PA, so that pre-distortion system obtains pre-distortion parameters, and the energy of progressively controlling the radio-frequency input signals that passes through the pre-distortion system processing of follow-up input PA increases, can realize the intermodulation component in the radio frequency output signal of PA starting stage (startup stage of being) output is proofreaied and correct, thereby improve the linearity of PA starting stage.
The schematic flow sheet of the launching technique of the another kind of radiofrequency signal that Fig. 2 provides for another embodiment of the present invention, as shown in Figure 2, the launching technique of the radiofrequency signal of present embodiment can may further comprise the steps:
Wherein, above-mentioned radio-frequency input signals is the signal after proofreading and correct through the pre-distortion system that disposes initial pre-distortion parameters.
In this step, by the pre-configured initial pre-distortion parameters of pre-distortion system, thereby make the intermodulation component in the radio frequency output signal of PA output can satisfy the requirement of intermodulation energy indexes, namely the difference between the energy of the energy of the useful component in the radio frequency output signal and intermodulation component is greater than the energy threshold that sets in advance.
Before this step, specifically can obtain initial pre-distortion parameters in radio frequency power output and the corresponding inter-modulated signal of production equipment phase by the emission target energy.
For example: by feedback path, the part in the above-mentioned radio frequency output signal that is coupled feeds back to pre-distortion system.
Alternatively, above-mentioned pre-distortion system can be digital pre-distortion (Digital Pre Distortion is called for short DPD) system.
Alternatively, above-mentioned pre-distortion system can also be analog predistortion (Analog Pre Distortion is called for short APD) system.
In the present embodiment, can satisfy the requirement of intermodulation energy indexes by PA to the intermodulation component that the radio-frequency input signals of handling through the pre-distortion system that disposes initial pre-distortion parameters amplifies in the radio frequency output signal of exporting afterwards, can realize the intermodulation component in the radio frequency output signal of PA starting stage (startup stage of being) output is proofreaied and correct, thereby improve the linearity of PA starting stage.
The schematic flow sheet of the launching technique of another radiofrequency signal that Fig. 3 provides for another embodiment of the present invention, as shown in Figure 3, the launching technique of the radiofrequency signal of present embodiment can may further comprise the steps:
Export first radio frequency after step 301, control PA amplify first radio-frequency input signals of importing and output signal to the rf load that sets in advance;
Part in step 302, the above-mentioned first radio frequency output signal of coupling feeds back to pre-distortion system;
For example: by feedback path, the part in the above-mentioned first radio frequency output signal that is coupled feeds back to pre-distortion system.
Export second radio frequency after step 303, the above-mentioned PA of control amplify second radio-frequency input signals of importing and output signal to antenna;
Wherein, above-mentioned second radio-frequency input signals is the signal after proofreading and correct through above-mentioned pre-distortion system.
For example: by feedback path, the part in the above-mentioned second radio frequency output signal that is coupled feeds back to pre-distortion system.
In the present embodiment, the pre-distortion parameters that the first radio frequency output signal of output obtained after pre-distortion system amplified first radio-frequency input signals according to the PA that obtains by feedback path, signal (baseband signal or radiofrequency signal) is proofreaied and correct, thereby realized second radio-frequency input signals is proofreaied and correct, so that nonlinear distortion is less, thereby make the intermodulation component in the second radio frequency output signal of PA output can satisfy the requirement of intermodulation energy indexes, namely the difference between the energy of the energy of the useful component in the second radio frequency output signal and intermodulation component is greater than the energy threshold that sets in advance.
Alternatively, above-mentioned pre-distortion system can be digital pre-distortion (Digital Pre Distortion is called for short DPD) system.
Alternatively, above-mentioned pre-distortion system can also be analog predistortion (Analog Pre Distortion is called for short APD) system.
In the present embodiment, radio frequency by control initial p A output outputs signal to the rf load that sets in advance, so that pre-distortion system obtains pre-distortion parameters, and the radio frequency of controlling follow-up PA output outputs signal to antenna, can realize the intermodulation component in the radio frequency output signal of PA starting stage (startup stage of being) output is proofreaied and correct, thereby improve the linearity of PA starting stage.
Need to prove: for aforesaid each method embodiment, for simple description, so it all is expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not subjected to the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in the specification all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, do not have the part that describes in detail among certain embodiment, can be referring to the associated description of other embodiment.
The structural representation of a kind of base station equipment that Fig. 4 provides for another embodiment of the present invention, as shown in Figure 4, the base station equipment of present embodiment can comprise control unit 41, coupling unit 42 and transmitter unit 43.Wherein, control unit 41 is used for the energy of first radio-frequency input signals of control input power amplifier PA, so that the difference between the energy of the energy of the useful component in the first radio frequency output signal that described PA exports after described first radio-frequency input signals is amplified and intermodulation component is greater than the energy threshold that sets in advance, wherein, the energy of the useful component in the described first radio frequency output signal is less than the target energy of radio frequency output signal, and according to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases, so that the energy of the second radio frequency output signal that final described PA exports after described second radio-frequency input signals is amplified is increased to the target energy of described radio frequency output signal, wherein, described second radio-frequency input signals is the signal after proofreading and correct through pre-distortion system; The part that coupling unit 42 is used for the described first radio frequency output signal of coupling and/or the described second radio frequency output signal feeds back to described pre-distortion system; Wherein, described pre-distortion system is used for according to the signal of described coupling unit feedback the signal of importing being carried out pre-distortion, to obtain described second radio-frequency input signals; Transmitter unit 43 is used for the described first radio frequency output signal of emission and/or the described second radio frequency output signal.
Wherein, after PA amplifies first radio-frequency input signals of input in the first radio frequency output signal of output the energy of useful component can comprise multiple implementation less than the target energy of radio frequency output signal.For example: the energy of all carrier waves in the first radio frequency output signal is all less than the target energy of carrier wave; Again for example: the energy of the part carrier wave in the first radio frequency output signal (carrier wave or a plurality of carrier wave) is less than the target energy of carrier wave, and the energy of other carrier waves is equal to the target energy of carrier wave.
The method of the embodiment of above-mentioned Figure 1A correspondence can be realized by the base station equipment that the embodiment of the invention provides.
Alternatively, the control unit 41 in the present embodiment specifically can pass through the energy of the baseband signal of control baseband module emission, the energy of first radio-frequency input signals of control input PA.
Alternatively, the control unit 41 in the present embodiment specifically can also pass through the energy of the signal of control variable gain amplifier output, the energy of first radio-frequency input signals of control input PA.
Alternatively, the control unit 41 in the present embodiment specifically can pass through the energy of the baseband signal of control baseband module emission, according to the energy increment that sets in advance, and the energy increase of second radio-frequency input signals of the described PA of control input.
Alternatively, the control unit 41 in the present embodiment specifically can also pass through the energy of the signal of control variable gain amplifier output, according to the energy increment that sets in advance, and the energy increase of second radio-frequency input signals of the described PA of control input.
Wherein, if it is suitable that energy increment arranges, so can be so that the intermodulation component in the second radio frequency output signal that above-mentioned PA exports after above-mentioned second radio-frequency input signals is amplified can satisfy the requirement of intermodulation energy indexes, namely the difference between the energy of the energy of the useful component in the second radio frequency output signal and intermodulation component is greater than the energy threshold that sets in advance.
Alternatively, above-mentioned pre-distortion system can be digital pre-distortion (Digital Pre Distortion is called for short DPD) system.
Alternatively, above-mentioned pre-distortion system can also be analog predistortion (Analog Pre Distortion is called for short APD) system.
In the present embodiment, control the energy of the radio-frequency input signals of initial input PA by control unit, so that pre-distortion system obtains pre-distortion parameters, and the energy of progressively controlling the radio-frequency input signals that passes through the pre-distortion system processing of follow-up input PA increases, can realize the intermodulation component in the radio frequency output signal of PA starting stage (startup stage of being) output is proofreaied and correct, thereby improve the linearity of PA starting stage.
The structural representation of the another kind of base station equipment that Fig. 5 provides for another embodiment of the present invention, as shown in Figure 5, the base station equipment of present embodiment can comprise pre-distortion system 51, power amplifier 52, transmitter unit 53 and coupling unit 54.Wherein, pre-distortion system 51 disposes initial pre-distortion parameters; Power amplifier 52 is used for the radio-frequency input signals of input is amplified, and output radio frequency output signal, difference between the energy of the useful component in this radio frequency output signal and the energy of intermodulation component is greater than the energy threshold that sets in advance, wherein, above-mentioned radio-frequency input signals is the signal after proofreading and correct according to described initial pre-distortion parameters through pre-distortion system 51; Transmitter unit 53 is used for the described radio frequency output signal of emission; The part that coupling unit 54 is used for the described radio frequency output signal of coupling feeds back to described pre-distortion system, in order to upgrade the pre-distortion parameters of described pre-distortion system.
The method of the embodiment of above-mentioned Fig. 2 correspondence can be realized by the base station equipment that the embodiment of the invention provides.
Alternatively, above-mentioned pre-distortion system can be digital pre-distortion (Digital Pre Distortion is called for short DPD) system.
Alternatively, above-mentioned pre-distortion system can also be analog predistortion (Analog Pre Distortion is called for short APD) system.
In the present embodiment, can satisfy the requirement of intermodulation energy indexes by power amplifier to the intermodulation component that the radio-frequency input signals of handling through the pre-distortion system that disposes initial pre-distortion parameters amplifies in the radio frequency output signal of exporting afterwards, can realize the intermodulation component in the radio frequency output signal of power amplifier starting stage (startup stage of being) output is proofreaied and correct, thereby improve the linearity of power amplifier starting stage.
The structural representation of another base station equipment that Fig. 6 provides for another embodiment of the present invention, as shown in Figure 6, the base station equipment of present embodiment can comprise control unit 61, coupling unit 62 and transmitter unit 63.Wherein, export first radio frequency after control unit 61 amplifies first radio-frequency input signals of importing for control PA and output signal to the rf load that sets in advance, and control described PA and second radio-frequency input signals of input is exported second radio frequency after amplifying output signal to antenna, wherein, described second radio-frequency input signals is the signal after proofreading and correct through pre-distortion system; The part that coupling unit 62 is used for the described first radio frequency output signal of coupling and/or the second radio frequency output signal feeds back to described pre-distortion system; Wherein, described pre-distortion system is used for according to the signal of described coupling unit feedback the signal of importing being carried out pre-distortion, to obtain described second radio-frequency input signals; Transmitter unit 63 is used for the described second radio frequency output signal of emission.
The method of the embodiment of above-mentioned Fig. 3 correspondence can be realized by the base station equipment that the embodiment of the invention provides.
Alternatively, above-mentioned pre-distortion system can be digital pre-distortion (Digital Pre Distortion is called for short DPD) system.
Alternatively, above-mentioned pre-distortion system can also be analog predistortion (Analog Pre Distortion is called for short APD) system.
In the present embodiment, radio frequency by control unit control initial p A output outputs signal to the rf load that sets in advance, so that pre-distortion system obtains pre-distortion parameters, and the radio frequency of controlling follow-up PA output outputs signal to antenna, can realize the intermodulation component in the radio frequency output signal of PA starting stage (startup stage of being) output is proofreaied and correct, thereby improve the linearity of PA starting stage.
The method that provides in the embodiment of the invention can also be applied to other communications fields, such as radar or satellite communication, can limit at this.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (15)
1. the launching technique of a radiofrequency signal is characterized in that, comprising:
The energy of first radio-frequency input signals of control input power amplifier PA, so that the difference between the energy of the energy of the useful component in the first radio frequency output signal that described PA exports after described first radio-frequency input signals is amplified and intermodulation component is greater than the energy threshold that sets in advance, wherein, the energy of the useful component in the described first radio frequency output signal is less than the target energy of radio frequency output signal;
Launch the described first radio frequency output signal, and the part in the described first radio frequency output signal that is coupled feeds back to pre-distortion system;
According to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases, so that the energy of the useful component in the second radio frequency output signal that final described PA exports after described second radio-frequency input signals is amplified is increased to the target energy of described radio frequency output signal, wherein, described second radio-frequency input signals is the signal after proofreading and correct through described pre-distortion system;
Launch the described second radio frequency output signal, and the part in the described second radio frequency output signal that is coupled feeds back to described pre-distortion system.
2. method according to claim 1 is characterized in that, the energy of the useful component after described PA amplifies described first radio-frequency input signals in the first radio frequency output signal of output comprises less than the target energy of radio frequency output signal:
After amplifying described first radio-frequency input signals, described PA has the energy of a carrier wave at least less than the target energy of carrier wave in the first radio frequency output signal of output.
3. method according to claim 1 and 2 is characterized in that, the energy of first radio-frequency input signals of described control input PA comprises:
The energy of the baseband signal by control baseband module emission, the energy of first radio-frequency input signals of control input PA; Perhaps
The energy of the signal by control variable gain amplifier output, the energy of first radio-frequency input signals of control input PA.
4. according to the described method of the arbitrary claim of claim 1 to 3, it is characterized in that according to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases, and comprising:
The energy of the baseband signal by control baseband module emission, according to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases; Perhaps
The energy of the signal by control variable gain amplifier output, according to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases.
5. according to the described method of the arbitrary claim of claim 1 to 4, it is characterized in that described pre-distortion system comprises digital pre-distortion system or analog predistortion system.
6. according to the described method of the arbitrary claim of claim 1 to 5, it is characterized in that, described method also comprises: described energy increment is set, so that the difference between the energy of the energy of the useful component in the second radio frequency output signal that described PA exports after described second radio-frequency input signals is amplified and intermodulation component is greater than the energy threshold that sets in advance.
7. the launching technique of a radiofrequency signal is characterized in that, comprising:
In radio frequency power output and the corresponding inter-modulated signal of production equipment phase by the emission target energy, obtain initial pre-distortion parameters, by power amplifier PA the radio-frequency input signals of input is amplified, and output radio frequency output signal, difference between the energy of the useful component in the described radio frequency output signal and the energy of intermodulation component is greater than the energy threshold that sets in advance, wherein, described radio-frequency input signals is the signal after proofreading and correct according to described initial pre-distortion parameters through the pre-distortion system that disposes initial pre-distortion parameters;
Launch described radio frequency output signal, and the part in the described radio frequency output signal that is coupled feeds back to described pre-distortion system, in order to upgrade the pre-distortion parameters of described pre-distortion system.
8. the launching technique of a radiofrequency signal is characterized in that, comprising:
Export first radio frequency after control power amplifier PA amplifies first radio-frequency input signals of importing and output signal to the rf load that sets in advance;
Part in the described first radio frequency output signal that is coupled feeds back to pre-distortion system;
Control described PA and second radio-frequency input signals of input is exported second radio frequency after amplifying output signal to antenna, wherein, described second radio-frequency input signals is the signal after proofreading and correct through described pre-distortion system;
Launch the described second radio frequency output signal, and the part in the described second radio frequency output signal that is coupled feeds back to described pre-distortion system.
9. a base station equipment is characterized in that, comprising:
Control unit, the energy that is used for first radio-frequency input signals of control input power amplifier PA, so that the difference between the energy of the energy of the useful component in the first radio frequency output signal that described PA exports after described first radio-frequency input signals is amplified and intermodulation component is greater than the energy threshold that sets in advance, wherein, the energy of the useful component in the described first radio frequency output signal is less than the target energy of radio frequency output signal, and according to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases, so that the energy of the second radio frequency output signal that final described PA exports after described second radio-frequency input signals is amplified is increased to the target energy of described radio frequency output signal, wherein, described second radio-frequency input signals is the signal after proofreading and correct through pre-distortion system;
Coupling unit, the part that is used for the described first radio frequency output signal of coupling and/or the described second radio frequency output signal feeds back to described pre-distortion system; Wherein, described pre-distortion system is used for according to the signal of described coupling unit feedback the signal of importing being carried out pre-distortion, to obtain described second radio-frequency input signals;
Transmitter unit is used for the described first radio frequency output signal of emission and/or the described second radio frequency output signal.
10. base station equipment according to claim 9 is characterized in that, the energy of the useful component after described PA amplifies described first radio-frequency input signals in the first radio frequency output signal of output comprises less than the target energy of radio frequency output signal:
After amplifying described first radio-frequency input signals, described PA has the energy of a carrier wave at least less than the target energy of carrier wave in the first radio frequency output signal of output.
11. according to claim 9 or 10 described base station equipments, it is characterized in that described control unit specifically is used for
The energy of the baseband signal by control baseband module emission, the energy of first radio-frequency input signals of control input PA; Perhaps
The energy of the signal by control variable gain amplifier output, the energy of first radio-frequency input signals of control input PA.
12. according to claim 9 or 10 described base station equipments, it is characterized in that described control unit specifically is used for
The energy of the baseband signal by control baseband module emission, according to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases; Perhaps
The energy of the signal by control variable gain amplifier output, according to the energy increment that sets in advance, the energy of second radio-frequency input signals of the described PA of control input increases.
13., it is characterized in that described pre-distortion system comprises digital pre-distortion system or analog predistortion system according to the described base station equipment of the arbitrary claim of claim 9 to 12.
14. a base station equipment is characterized in that, comprising:
Pre-distortion system disposes initial pre-distortion parameters, wherein in radio frequency power output and the corresponding inter-modulated signal of production equipment phase by the emission target energy, obtains initial pre-distortion parameters;
Power amplifier PA, be used for the radio-frequency input signals of input is amplified, and output radio frequency output signal, difference between the energy of the useful component in the described radio frequency output signal and the energy of intermodulation component is greater than the energy threshold that sets in advance, wherein, described radio-frequency input signals is the signal after proofreading and correct according to described initial pre-distortion parameters through described pre-distortion system;
Transmitter unit is used for the described radio frequency output signal of emission;
Coupling unit, the part that is used for the described radio frequency output signal of coupling feeds back to described pre-distortion system, in order to upgrade the pre-distortion parameters of described pre-distortion system.
15. a base station equipment is characterized in that, comprising:
Control unit, being used for control power amplifier PA exports first radio frequency after first radio-frequency input signals of input is amplified and outputs signal to the rf load that sets in advance, and control described PA and second radio-frequency input signals of input is exported second radio frequency after amplifying output signal to antenna, wherein, described second radio-frequency input signals is the signal after proofreading and correct through pre-distortion system;
Coupling unit, the part that is used for the described first radio frequency output signal of coupling and/or the second radio frequency output signal feeds back to described pre-distortion system; Wherein, described pre-distortion system is used for according to the signal of described coupling unit feedback the signal of importing being carried out pre-distortion, to obtain described second radio-frequency input signals;
Transmitter unit is used for the described second radio frequency output signal of emission.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2011/075273 WO2011157168A2 (en) | 2011-06-03 | 2011-06-03 | Method for transmitting radio frequency signal and base station device |
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| Publication Number | Publication Date |
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| CN102217262A CN102217262A (en) | 2011-10-12 |
| CN102217262B true CN102217262B (en) | 2013-10-09 |
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| CN107017954B (en) * | 2017-02-16 | 2020-10-23 | 广东顺德中山大学卡内基梅隆大学国际联合研究院 | Adaptive wireless signal and energy composite transmission sampling system based on time slot control |
| CN112994721B (en) * | 2019-11-29 | 2022-07-22 | 华为技术有限公司 | Multichannel antenna correcting device, array antenna and communication equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101662435A (en) * | 2009-09-24 | 2010-03-03 | 中兴通讯股份有限公司 | Device and method for obtaining and adjusting digit pre-distortion parameters |
| CN102014473A (en) * | 2010-12-09 | 2011-04-13 | 中兴通讯股份有限公司 | Power calibration control method and device |
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| US7471736B2 (en) * | 2003-09-30 | 2008-12-30 | Alcatel-Lucent Usa Inc. | Frequency based modulator compensation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101662435A (en) * | 2009-09-24 | 2010-03-03 | 中兴通讯股份有限公司 | Device and method for obtaining and adjusting digit pre-distortion parameters |
| CN102014473A (en) * | 2010-12-09 | 2011-04-13 | 中兴通讯股份有限公司 | Power calibration control method and device |
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| CN102217262A (en) | 2011-10-12 |
| WO2011157168A3 (en) | 2012-05-03 |
| WO2011157168A2 (en) | 2011-12-22 |
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