CN103650444A

CN103650444A - Identification method, apparatus, system and base station

Info

Publication number: CN103650444A
Application number: CN201380000843.5A
Authority: CN
Inventors: 叶四清; 肖宇翔; 李珽; 尤览
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2013-06-28
Filing date: 2013-06-28
Publication date: 2014-03-19
Anticipated expiration: 2033-06-28
Also published as: CN103650444B; WO2014205797A1

Abstract

The embodiment of the invention discloses an identification method comrpsing a first input signal receiving an inject signal produced by an inject unit and conducting linear identification of the inject signal as well as receiving a second input signal, wherein the second input signal comprises linear distortion information of predistortion internal ring for pre-distortion process of a downgoing signal of the base station and the first input signal after processed via predistortion intenrla ring; and a liner compensation factor is calculated according to the first input signal and the second input signal.the embodiment of the invention further discloses an identification apparatus, a system and a base station.With the invention, better linear identification and compensation can be achieved for signals with different bandwidths in the predistortion internal ring, practicality of the sytem is improved and launch distortion is reduced.

Description

A kind of discrimination method, device, system and base station

Technical field

The present invention relates to communication technical field, relate in particular to a kind of discrimination method, device, system and base station.

Background technology

In base station, transmitting distortion is the key factor that affects communication quality.So need to proofread and correct transmission channel distortion.Please refer to Fig. 1, is the composition schematic diagram of identification system in prior art.Whole system comprises digital pre-distortion unit, linear compensation unit, linear Identification unit, transmitter unit, feedback receiving element, decimal time delay and width align unit, subtrator and integer delay unit.By digital pre-distortion unit, linear compensation unit and transmitter unit form transmission channel, base station down signal part input integer delay unit, another part input digital pre-distortion unit, after pre-distortion, export linear compensation unit to and carry out linear compensation, base station down signal after linear compensation exports transmitter unit to and is converted to and transmits, the part transmitting exports wireless space to by transmitter unit, a part exports feedback receiving element to, by feedback receiving element, be converted to the first feedback signal and export decimal time delay to and the width unit that aligns, decimal time delay and the width unit that aligns receives the base station down signal from the time delay of integer delay unit, by after the first feedback signal decimal time delay of feedback receiving element output, after aligning with the base station down signal width of integer delay unit time delay again, export linear Identification unit and subtrator to, linear Identification unit receives the base station down signal after linear compensation, the second feedback signal after aligning according to the base station down signal after linear compensation and width is calculated linear compensation coefficient and the linear compensation coefficient calculating is sent to linear compensation unit, base station down signal by linear compensation unit after to pre-distortion carries out linear compensation, subtrator receives the base station down signal of integer delay unit time delay, after the second feedback signal after decimal time delay and width are aligned and the base station down signal subtraction of integer time delay, obtain error signal and export digital pre-distortion unit to, digital pre-distortion unit is according to base station down signal and error signal calculation pre-distortion coefficients, complete the digital pre-distortion of base station down signal is processed, thereby reduce transmitting distortion.Wherein, for the loop that base station down signal is carried out to pre-distortion, be called in predistortion and encircle, in Fig. 1, by digital pre-distortion unit, linear compensation unit, transmitter unit, feedback receiving element, decimal time delay and the width loop that unit and subtrator form that aligns, can be described as in predistortion and encircle.In order to guarantee convergence and the performance of digital pre-distortion unit algorithm, it is very necessary that ring in predistortion is carried out to linear compensation.Linear compensation can comprise the mutually balanced precompensation of width and homophase and quadrature (Inphase and Quadrature is called for short IQ) mirror image distortion precompensation.If linear compensation effect is poor, will cause existing the mutually equalizing distorted or IQ mirror image distortion of width, while so finally calculating pre-distortion coefficients by produce larger error even algorithm do not restrain Enlarging-Errors or be not tending towards 0.Therefore, the effect of linear compensation is very important.And the effect of linear compensation depends primarily on the calculating of linear compensation coefficient.

In the prior art, linear compensation coefficient is according to the base station down signal after linear compensation, and carries out with the base station down signal of integer time delay that the second feedback signal after width aligns calculates.Wherein, the linear distortion information that comprises ring in predistortion in second feedback signal of width after aligning.Because the linear Identification precision of ring signal in predistortion is relevant with the bandwidth of signal by encircling in predistortion, more hour, linear Identification precision is lower for the bandwidth of the signal encircling in by predistortion.And base station down signal bandwidth changes with business configuration, in the time of the narrowest, may only have a global system for mobile communications (Global System of Mobile communication is called for short GSM) carrier wave.Now, linear Identification unit cannot carry out effective linear Identification to ring in digital pre-distortion, then cannot carry out effective linear compensation to ring in digital pre-distortion, also will affect the calculating of pre-distortion coefficients thus, causes launching distortion serious.

Summary of the invention

The embodiment of the present invention provides a kind of discrimination method, device, system and base station, can carry out good linear Identification and compensation to the signal of various different bandwidths in ring in predistortion, has improved the applicability of system, has reduced transmitting distortion.

Embodiment of the present invention first aspect provides a kind of discrimination method, can comprise:

Receive and inject the Injection Signal that unit produces, the first input signal using described Injection Signal as linear Identification;

Receive the second input signal, wherein, described the second input signal comprises linear distortion information and the first input signal after ring in described predistortion is processed for base station down signal is carried out encircling in the predistortion of pre-distortion;

According to described the first input signal and described the second input signal, calculate linear compensation coefficient.

In the possible implementation of the first, described the second input signal is that the first feedback signal is through after decimal time delay, carry out with the base station down signal of integer time delay the second feedback signal generating after phase and magnitude registration process, wherein, described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.

In the possible implementation of the second, described the second input signal is that the first feedback signal is through after decimal time delay, carry out amplitude and phase alignment processing with the base station down signal of integer time delay, carry out subtraction process with the base station down signal of described integer time delay again, remove the error signal generating after the base station down signal message of described integer time delay, wherein, described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.

In conjunction with the possible implementation of first or the second of first aspect, in the third possible implementation, described transmitting as described transmitter unit is according to closing the signal that road signal is changed and exported, wherein, described in, closing road signal is the signal of output after described adder unit is added the described Injection Signal of the base station down signal after linear compensation of the linear compensation unit output receiving and the generation of described injection unit.

In conjunction with first aspect or in conjunction with first or second or the third possible implementation of first aspect, in the 4th kind of possible implementation, the band of described Injection Signal is wider than bandwidth threshold K, and described bandwidth threshold K is greater than 0.

Embodiment of the present invention second aspect provides a kind of device for identifying, can comprise:

Receiver module, for receiving, inject the Injection Signal that unit produces, the first input signal using described Injection Signal as linear Identification, and reception the second input signal, wherein, described the second input signal comprises linear distortion information and the first input signal after ring in described predistortion is processed for base station down signal is carried out encircling in the predistortion of pre-distortion;

Computing module, for described the first input signal and described the second input signal receiving according to described receiver module, calculates linear compensation coefficient.

In conjunction with the possible implementation of first or the second of second aspect, in the third possible implementation, described transmitting as described transmitter unit is according to closing the signal that road signal is changed and exported, wherein, described in, closing road signal is the signal of output after described adder unit is added the described Injection Signal of the base station down signal after linear compensation of the linear compensation unit output receiving and the generation of described injection unit.

In conjunction with second aspect or in conjunction with first or second or the third possible implementation of second aspect, in the 4th kind of possible implementation, the band of described Injection Signal is wider than bandwidth threshold K, and described bandwidth threshold K is greater than 0.

The embodiment of the present invention third aspect provides a kind of identification system, can comprise:

Linear Identification unit, for receiving Injection Signal, the first input signal using described Injection Signal as linear Identification, and receive the second input signal, according to described the first input signal and described the second input signal, calculate linear compensation coefficient; Wherein, described the second input signal comprises linear distortion information and the first input signal after ring in described predistortion is processed for base station down signal is carried out encircling in the predistortion of pre-distortion;

The first linear compensating unit, for receiving the base station down signal after pre-distortion, the base station down signal of the linear compensation coefficient calculating according to described linear Identification unit after to described pre-distortion carries out exporting after linear compensation;

Inject unit, for exporting described Injection Signal;

Adder unit, for receiving the base station down signal after described Injection Signal and described the first linear compensating unit linear compensation, will export after the base station down signal plus after described Injection Signal and described linear compensation;

Transmitter unit, for receiving described adder unit output He road signal, will described in close road signal and be converted to and transmit and export;

Feedback receiving element, for receiving transmitting of described transmitter unit output, will described in transmit and be converted to the first feedback signal output;

Decimal time delay and the width unit that aligns, for receiving the first feedback signal of the base station down signal of integer time delay and the output of described feedback receiving element, will after described the first feedback signal decimal time delay, generate the second feedback signal output with amplitude and the phase alignment of the base station down signal of described integer time delay;

Integer delay unit, for receiving described base station down signal, carries out exporting to after integer delay process described decimal time delay and the width unit that aligns to described base station down signal;

Subtrator, for receiving the align base station down signal of the second feedback signal of unit output and the integer time delay of described integer delay unit output of described decimal time delay and width, by the base station down signal subtraction of the integer time delay of described the second feedback signal and the output of described integer delay unit, the base station down signal message of removing described integer time delay obtains error signal output;

Digital pre-distortion unit, for receiving error signal and the described base station down signal of described subtrator output, according to described error signal and described base station down calculated signals, obtain pre-distortion coefficients, according to described pre-distortion coefficients, described base station down signal carried out to pre-distortion and export described the first linear compensating unit to.

In the possible implementation of the first, described the second input signal is described decimal time delay and width the second feedback signal of unit output that aligns, or be the error signal that described subtrator is exported.

In conjunction with the third aspect or in conjunction with the possible implementation of the first of the third aspect, in the possible implementation of the second, described integer delay unit is specifically for carrying out the integer time delay of an integer clock cycle to described base station down signal; Described decimal time delay and width align unit specifically for the decimal time delay of the first feedback signal of described feedback receiving element output being carried out to a non-integer clock cycle so that amplitude and the phase alignment of the base station down signal of the integer time delay that the first feedback signal of described feedback receiving element output and described integer delay unit are exported.

In conjunction with the third aspect or in conjunction with the possible implementation of first or the second of the third aspect, in the third possible implementation, described system also comprises:

Switch selected cell, for receiving the error signal of described subtrator output and described decimal time delay and width the second feedback signal of unit output that aligns, and selects described error signal or described the second feedback signal to export described linear Identification unit to.

In conjunction with the third aspect or in conjunction with first or second or the third possible implementation of the third aspect, in the 4th kind of possible implementation, described system also comprises:

The second linear compensation unit, for receiving align the second feedback signal of unit output of described decimal time delay and width, the linear compensation coefficient calculating according to described linear Identification unit carries out generating the 3rd feedback signal after linear compensation to align the second feedback signal of unit output of described decimal time delay and width, and exports described subtrator to.

In conjunction with the third aspect or in conjunction with the first or second or the 3rd or the 4th kind of possible implementation of the third aspect, in the 5th kind of possible implementation, described the first linear compensating unit and described digital pre-distortion unit integrate or arrange separately.

Embodiment of the present invention fourth aspect provides a kind of device for identifying, can comprise:

Processor and the memory matching with described processor;

The program that described memory is carried out for storing described processor;

Described processor injects for receiving the Injection Signal that unit produces, the first input signal using described Injection Signal as linear Identification, and reception the second input signal, wherein, described the second input signal comprises linear distortion information and the first input signal after ring in described predistortion is processed for base station down signal is carried out encircling in the predistortion of pre-distortion; According to described the first input signal and described the second input signal that receive, calculate linear compensation coefficient.

In conjunction with the possible implementation of first or the second of fourth aspect, in the third possible implementation, described transmitting as described transmitter unit is according to closing the signal that road signal is changed and exported, wherein, described in, closing road signal is the signal of output after described adder unit is added the described Injection Signal of the base station down signal after linear compensation of the linear compensation unit output receiving and the generation of described injection unit.

In conjunction with fourth aspect or in conjunction with first or second or the third possible implementation of fourth aspect, in the 4th kind of possible implementation, the band of described Injection Signal is wider than bandwidth threshold K, and described bandwidth threshold K is greater than 0.

The embodiment of the present invention the 5th aspect provides a kind of base station, can comprise:

System described in arbitrary implementation in the embodiment of the present invention third aspect or the third aspect.

Implement the embodiment of the present invention, there is following beneficial effect:

By receiving first input signal that can carry out effective linear Identification to system performance, it is Injection Signal, and the second input signal that comprises predistortion inner loop-line distortion information and the first input signal after ring in described predistortion is processed, through calculating, can obtain comparatively accurate linear compensation coefficient, make the effect of linear Identification and compensation and the signal bandwidth of digital pre-distortion unit output irrelevant, improved the applicability of system; Realized digital pre-distortion unit output signal is carried out to good linear compensation, made digital pre-distortion unit calculate pre-distortion coefficients time error less, final reduction launched distortion.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the composition schematic diagram of existing identification system;

Fig. 2 is the schematic flow sheet of embodiment of the present invention discrimination method;

Fig. 3 is the composition schematic diagram of device for identifying the first embodiment of the present invention;

Fig. 4 is the composition schematic diagram of the first embodiment of identification system of the present invention;

Fig. 5 is the composition schematic diagram of the second embodiment of identification system of the present invention;

Fig. 6 is the composition schematic diagram of the 3rd embodiment of identification system of the present invention;

Fig. 7 is the composition schematic diagram of the 4th embodiment of identification system of the present invention;

Fig. 8 is the composition schematic diagram of device for identifying the second embodiment of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

Referring to Fig. 2, is the schematic flow sheet of embodiment of the present invention discrimination method, and the method can be applied to, in the linear Identification unit of identification system, in the present embodiment, said method comprising the steps of:

S201, receives and injects the Injection Signal that unit produces, the first input signal using described Injection Signal as linear Identification.

Usually, its input signal of digital pre-distortion unit be the bandwidth of base station down signal be no more than the maximum output bandwidth in digital pre-distortion unit 1/3rd.If ring in predistortion is done to linear compensation based on base station down signal, because input signal bandwidth changes with BTS service configuration, in the time of the narrowest, may only have a GSM carrier wave, only has 200kHz, now the bandwidth of digital pre-distortion element output signal can only be less than or equal to this bandwidth, because bandwidth is narrow, cannot complete the effective identification to ring property in predistortion.In general, output bandwidth is larger, is more conducive to effective identification of ring property in predistortion.

Particularly, in the present embodiment, the band that described the first input signal is Injection Signal is wider than bandwidth threshold K, and wherein, described bandwidth threshold K is greater than 0.According to a large amount of analog simulations and practical operation experience, herein the value of threshold k can be configured to 0.8fs or more than, wherein, fs is that digital pre-distortion unit is by the sample rate of signal, when the bandwidth numerical value of Injection Signal is greater than 0.8fs, described Injection Signal can be called broadband signal, is beneficial to linear Identification and follow-up linear compensation.Certainly, when K is less than 0.8fs, also can carry out linear Identification to the characteristic of encircling in predistortion, but no matter be that identification efficiency and identification precision all significantly reduce.

More specifically, the amplitude of described Injection Signal is less, its amplitude size approaches in the performance of transmitter unit output and the amplitude of transmitter unit circuit noise size, and both differences are in a preset range, and even the amplitude of Injection Signal is less than the amplitude size of transmitter unit circuit noise.Like this, the interference that the Injection Signal of reception causes base station down signal can be ignored substantially.There is no base station down signal through in digital pre-distortion unit, due to the interference problem not existing base station down signal, therefore can suitably improve the amplitude of Injection Signal output.

S202, receives the second input signal.

Wherein, described the second input signal comprises linear distortion information and the first input signal after ring in described predistortion is processed for base station down signal is carried out encircling in the predistortion of pre-distortion.

In the present embodiment, the linear distortion information and the first input signal after ring in described predistortion is processed that in described the second input signal, comprise ring in predistortion.Described the first input signal is not only for the reference signal as linear Identification, also can export with the base station down signal plus after digital pre-distortion processing and linear compensation described transmitter unit the processing through encircling in predistortion to simultaneously, therefore, in described the second input signal, linear distortion information and the first input signal after ring in described predistortion is processed encircling in predistortion will be comprised.

S203, according to described the first input signal and described the second input signal, calculates linear compensation coefficient.

When described Injection Signal is when the first input signal is broadband signal, can carry out effective linear Identification to ring property in predistortion, thereby obtain comparatively accurate linear compensation coefficient digital pre-distortion unit output signal is carried out to good linear compensation, make digital pre-distortion unit calculate pre-distortion coefficients time error less, final reduction launched distortion, because added Injection Signal, so the signal bandwidth of the effect of linear Identification and compensation and the input of digital pre-distortion unit is irrelevant, improved the applicability of system.

Wherein, described the second input signal can, for the first feedback signal is through after decimal time delay, carry out with the base station down signal of integer time delay the second feedback signal generating after phase and magnitude registration process.

Described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.Described transmitting as described transmitter unit is according to closing the signal that road signal is changed and exported.Described to close road signal be described adder unit by the base station down signal after linear compensation of the linear compensation unit output receiving and described Injection Signal that described injection unit produces, also i.e. the first input signal, the signal of output after being added.

Preferably, described the second input signal signal is that the first feedback signal is through after decimal time delay, carry out amplitude and phase alignment processing with the base station down signal of integer time delay, carry out subtraction process with the base station down signal of described integer time delay again, remove the error signal generating after the base station down signal message of described integer time delay.The concrete expression of described integer time delay is carried out the integer time delay of a clock cycle to base station down signal; Described decimal time delay is concrete represents that the decimal time delay that the first feedback signal of described feedback receiving element output is carried out to a non-integer clock cycle is so that amplitude and the phase alignment of the first feedback signal of described feedback receiving element output and the base station down signal of integer time delay.

Because described the second feedback signal derives from base station down signal, so the information that comprises a large amount of base station down signals in described the second feedback signal.And the amplitude of described Injection Signal is generally less, therefore equally less in the amplitude of Injection Signal described in described the second feedback signal, ratio with respect to base station down signal and circuit noise is also less, needs the relevant accumulation of long period to promote described Injection Signal with respect to the ratio of base station down signal and circuit noise while carrying out linear Identification.Conventionally the amplitude of base station down signal is much larger than circuit noise.

Described the second feedback signal, because passed through a series of processing, has a timing difference with described base station down signal.If can remove the information of the described base station down signal comprising in described second feedback signal of reception, will greatly shorten the relevant integration time of so described Injection Signal.And about the content of base station down signal, removed in the error signal that adopts subtraction process to obtain, therefore can obtain the relevant integration time of desirable Injection Signal.

Certainly, when transmission channel starts, owing to there is no the input of base station down signal, therefore can receive the Injection Signal that amplitude is large obtains linear compensation coefficient, can shorten equally relevant integration time, at this moment can be directly with not removing the feedback signal of base station down signal message as the second input signal of linear Identification.

Referring to Fig. 3, is the composition schematic diagram of device for identifying the first embodiment of the present invention.In the present embodiment, described device comprises: receiver module 100 and computing module 200.

Described receiver module 100 injects for receiving the Injection Signal that unit produces, the first input signal using described Injection Signal as linear Identification, and reception the second input signal, wherein, described the second input signal comprises linear distortion information and the first input signal after ring in described predistortion is processed for base station down signal is carried out encircling in the predistortion of pre-distortion;

Particularly, in the present embodiment, the band that described the first input signal is Injection Signal is wider than bandwidth threshold K, and described bandwidth threshold K is greater than 0, according to a large amount of analog simulations and practical operation experience, herein the value of threshold k can be configured to 0.8fs or more than, wherein, fs is that digital pre-distortion unit is by the sample rate of signal, when the bandwidth numerical value of Injection Signal is greater than 0.8fs, described Injection Signal can be called broadband signal, is beneficial to linear Identification and follow-up linear compensation.Certainly, when K is less than 0.8fs, also can carry out linear Identification to the characteristic of encircling in predistortion, but no matter be that identification efficiency and identification precision all significantly reduce.

Described first input signal and described second input signal of described computing module 200 for receiving according to described receiver module, calculates linear compensation coefficient.

Certainly, when transmission channel starts, owing to there is no the input of base station down signal, therefore can receive the Injection Signal that amplitude is large obtains linear compensation coefficient, can shorten equally relevant integration time.At this moment can be directly with not removing the feedback signal of base station down signal message as the second input signal of linear Identification.

Referring to Fig. 4, is the composition schematic diagram of the first embodiment of identification system of the present invention.In the present embodiment, described system comprises: the linear compensating unit 2 in linear Identification unit 1, first, inject unit 3, adder unit 4, transmitter unit 5, feedback receiving element 6, decimal time delay and width align unit 7, integer delay unit 8, subtrator 9, digital pre-distortion unit 10.

Described linear Identification unit 1 is for receiving Injection Signal, and the first input signal using described Injection Signal as linear Identification, and reception the second input signal, according to described the first input signal and described the second input signal, calculate linear compensation coefficient; Wherein, described the second input signal comprises linear distortion information and the first input signal after ring in described predistortion is processed for base station down signal is carried out encircling in the predistortion of pre-distortion;

Described the first linear compensating unit 2 is for receiving the base station down signal after pre-distortion, and the base station down signal of the linear compensation coefficient calculating according to described linear Identification unit 1 after to described pre-distortion carries out exporting after linear compensation;

Described injection unit 3 is for exporting described Injection Signal;

Described adder unit 4, for receiving the base station down signal after described Injection Signal and described the first linear compensating unit linear compensation, will be exported after the base station down signal plus after described Injection Signal and described linear compensation;

Described transmitter unit 5 is for receiving described adder unit 4 output He road signals, will described in close road signal and be converted to and transmit and export;

Described feedback receiving element 6, for receiving transmitting of described transmitter unit 5 outputs, transmits described in inciting somebody to action and is converted to the first feedback signal output;

Described decimal time delay and width align unit 7 for receiving the first feedback signal of the base station down signal of integer time delay and 6 outputs of described feedback receiving element, will after described the first feedback signal decimal time delay, generate the second feedback signal output with amplitude and the phase alignment of the base station down signal of described integer time delay;

Described integer delay unit 8 is for receiving described base station down signal, and described base station down signal is carried out exporting to after integer delay process described decimal time delay and the width unit 7 that aligns;

Described subtrator 9 is for receiving the align base station down signal of the second feedback signal of unit 7 output and the integer time delay of described integer delay unit 8 outputs of described decimal time delay and width, by the base station down signal subtraction of the integer time delay of described the second feedback signal and 8 outputs of described integer delay unit, the base station down signal message of removing described integer time delay obtains error signal output;

Described digital pre-distortion unit 10 is for receiving error signal and the described base station down signal of described subtrator 9 outputs, according to described error signal and described base station down calculated signals, obtain pre-distortion coefficients, according to described pre-distortion coefficients, described base station down signal carried out to pre-distortion and export described the first linear compensating unit 2 to.

Described integer delay unit 8 is specifically for carrying out the integer time delay of an integer clock cycle to described base station down signal; Described decimal time delay and width align unit 7 specifically for the decimal time delay of the first feedback signal of described feedback receiving element output being carried out to a non-integer clock cycle so that amplitude and the phase alignment of the base station down signal of the integer time delay that the first feedback signal of described feedback receiving element 6 outputs and described integer delay unit 8 are exported.

In the present embodiment, by configuration, inject unit and adder unit, utilize Injection Signal as the first input signal of linear Identification, utilize the second feedback signal as the second input signal of linear Identification, and in the second feedback signal, comprise that the first input signal is the linear distortion information of ring in Injection Signal and predistortion simultaneously, thereby calculate linear compensation coefficient accurately, improved the effect of linear compensation, reduce the error while calculating pre-distortion coefficients, finally reduced transmitting distortion.

Certainly, in the present embodiment, the signal being added in described adder unit 4 can be also the base station down signal before described the first linear compensating unit 3 linear compensations, first injects described Injection Signal, then the signal after being added is carried out to linear compensation.Specific algorithm is slightly different, and the effect of linear Identification is similar.

Referring to Fig. 5, is the composition schematic diagram of the second embodiment of identification system of the present invention.In the present embodiment, described system comprises: the linear compensating unit 2 in linear Identification unit 1, first, inject unit 3, adder unit 4, transmitter unit 5, feedback receiving element 6, decimal time delay and width align unit 7, integer delay unit 8, subtrator 9, digital pre-distortion unit 10.

Described injection unit 3 is for exporting described Injection Signal;

Described integer delay unit 8 is specifically for carrying out the integer time delay of an integer clock cycle to described base station down signal;

Described decimal time delay and width align unit 7 specifically for the decimal time delay of the first feedback signal of described feedback receiving element output being carried out to a non-integer clock cycle so that amplitude and the phase alignment of the base station down signal of the integer time delay that the first feedback signal of described feedback receiving element 6 outputs and described integer delay unit 8 are exported.

Described the second input signal signal is that the first feedback signal is through after decimal time delay, carry out amplitude and phase alignment processing with the base station down signal of integer time delay, carry out subtraction process with the base station down signal of described integer time delay again, remove the error signal generating after the base station down signal message of described integer time delay.The concrete expression of described integer time delay is carried out the integer time delay of a clock cycle to base station down signal; Described decimal time delay is concrete represents that the decimal time delay that the first feedback signal of described feedback receiving element output is carried out to a non-integer clock cycle is so that amplitude and the phase alignment of the first feedback signal of described feedback receiving element output and the base station down signal of integer time delay.

Certainly, when transmission channel starts, owing to there is no the input of base station down signal, therefore can receive the Injection Signal that amplitude is large obtains linear compensation coefficient, can shorten equally relevant integration time, and can not cause larger interference to base station down signal.At this moment can be directly with not removing the feedback signal of base station down signal message as the second input signal of linear Identification.

In the present embodiment, the signal being added in described adder unit 4 can be also the base station down signal before described the first linear compensating unit 3 linear compensations, first injects described Injection Signal, then the signal after being added is carried out to linear compensation.Specific algorithm is slightly different, and the effect of linear Identification is similar.

Utilize Injection Signal as the first input signal of linear Identification, utilization has been removed the error signal of base station down signal message as the second input signal of linear Identification, and in error signal, comprise that the first input signal is the linear distortion information of ring in Injection Signal and predistortion simultaneously, greatly reduce like this integration time of Injection Signal, improved the efficiency of system.

Referring to Fig. 6, is the composition schematic diagram of the 3rd embodiment of identification system of the present invention.In the present embodiment, described system comprises: the linear compensating unit 2 in linear Identification unit 1, first, inject unit 3, adder unit 4, transmitter unit 5, feedback receiving element 6, decimal time delay and width align unit 7, integer delay unit 8, subtrator 9, digital pre-distortion unit 10, switch selected cell 11.

Described injection unit 3 is for exporting described Injection Signal;

Described switch selected cell 11, for receiving the error signal of described subtrator 9 outputs and described decimal time delay and width the second feedback signal of unit 7 outputs that aligns, and select described error signal or described the second feedback signal to export described linear Identification unit 1 to.

For example, in order to shorten relevant integration time, can when transmission channel starts, receive so the Injection Signal that amplitude is large and obtain linear compensation coefficient.At this moment can directly use and not remove the feedback signal of base station down signal message as the contrast signal of linear Identification, and by described switch selected cell 11, select to close the path of described error signal.Certainly, described switch selected cell 11 can also be for when train described digital pre-distortion unit 10, and the input signal of closing described linear Identification unit 1 disturbs to reduce.

Referring to Fig. 7, is the composition schematic diagram of the 4th embodiment of identification system of the present invention.In the present embodiment, described system comprises: the linear compensating unit 2 in linear Identification unit 1, first, inject unit 3, adder unit 4, transmitter unit 5, feedback receiving element 6, decimal time delay and width align unit 7, integer delay unit 8, subtrator 9, digital pre-distortion unit 10, switch selected cell 11, the second linear compensation unit 12.

Described injection unit 3 is for exporting described Injection Signal;

Described the second linear compensation unit 12 is for receiving align the second feedback signal of unit 7 output of described decimal time delay and width, the linear compensation coefficient calculating according to described linear Identification unit 1 carries out generating the 3rd feedback signal after linear compensation to align the second feedback signal of unit 7 outputs of described decimal time delay and width, and exports described subtrator 9 to.

Described the first linear compensating unit 2 integrates with described digital pre-distortion unit 10 or arranges separately.

In the present embodiment, described Injection Signal can be pseudo noise (Pseudo-Noise is called for short PN), uses the relevant accumulation of time domain.Also can be that periodic signal is as orthogonal frequency division multiplexi (Orthogonal Frequency Division Multiplexing is called for short OFDM), the time domain in life cycle or spectrum correlation accumulation.

On the whole: base station down signal part input integer delay unit 8, another part is inputted described digital pre-distortion unit 10, after pre-distortion, export described the first linear compensating unit 2 to, after linear compensation, export described adder unit 4 to, after being added with the Injection Signal of described injection unit 3 output, export described transmitter unit 5 to, through digital-to-analogue conversion, up-conversion, after power amplification, be converted to transmit and export wireless space to, the part transmitting exports described feedback receiving element 6 to and carries out exporting to after down-conversion and analog-to-digital conversion described decimal time delay and the width unit 7 that aligns, align unit 7 of described decimal time delay and width receives the base station down signal from time delay in described integer delay unit 8, to after the first feedback signal decimal time delay of described feedback receiving element 6 outputs, align and export described the second linear compensation unit 12 to and carry out linear compensation with the base station down signal width of described time delay again, export again described switch selected cell 11 and described subtrator 9 to, described subtrator 9 receives the base station down signal of time delay in described integer delay unit 8, to after described the second linear compensation module 12 the 3rd feedback signals of output and the base station down signal subtraction of integer time delay, obtain error signal and export described switch selected cell 11 to and described digital pre-distortion unit 10, described switch selected cell 11 selects suitable signal to export described linear Identification unit 1 to more as required, described linear Identification unit 1 receives the signal of described switch selected cell 11 outputs and the Injection Signal of described injection unit 3 outputs calculates linear compensation coefficient and exports described the first linear compensating unit 2 and described the second linear compensation unit 12 to, complete linear compensation, described digital pre-distortion unit 10 is according to the error signal calculation pre-distortion coefficients of base station down signal and 9 outputs of described subtrator, complete the digital pre-distortion of base station down signal is processed.

First, second and third embodiment based on identification system of the present invention, the embodiment of the present invention also comprises a kind of base station, described base station comprises any one identification system as above, it should be noted that, in the base station described in the embodiment of the present invention, unit in any one identification system can arrange separately with the form of hardware above, also can integrate with example, in hardware, can also a part form and store in memory with software with example, in hardware setting, a part, the embodiment of the present invention is not done any restriction.

Referring to Fig. 8, is the composition schematic diagram of device for identifying the second embodiment of the present invention.In the present embodiment, described device comprises:

Processor 300 and the memory 400 matching with described processor 300;

The program that described memory 400 is carried out for storing described processor 300;

Described processor 300 injects for receiving the Injection Signal that unit produces, the first input signal using described Injection Signal as linear Identification, and reception the second input signal, wherein, described the second input signal comprises linear distortion information and the first input signal after ring in described predistortion is processed for base station down signal is carried out encircling in the predistortion of pre-distortion; According to described the first input signal and described the second input signal that receive, calculate linear compensation coefficient.

Wherein, described the second input signal is, after the first feedback signal is passed through decimal time delay, to carry out with the base station down signal of integer time delay the second feedback signal generating after phase and magnitude registration process.

Or, described the second input signal is that the first feedback signal is through after decimal time delay, carry out amplitude and phase alignment processing with the base station down signal of integer time delay, carry out subtraction process with the base station down signal of described integer time delay again, remove the error signal generating after the base station down signal message of described integer time delay.

Particularly, described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.Described transmitting as described transmitter unit is according to closing the signal that road signal is changed and exported.The described road signal that closes is the signal of exporting after described adder unit is added the described Injection Signal of the base station down signal after linear compensation of the linear compensation unit output receiving and the generation of described injection unit.The band of described Injection Signal is wider than bandwidth threshold K, and described bandwidth threshold K is greater than 0.

By the description of above-described embodiment, the present invention has the following advantages:

By receiving first input signal that can carry out effective linear Identification to system performance, it is Injection Signal, and the second input signal that comprises predistortion inner loop-line distortion information and the first input signal after ring in described predistortion is processed, through calculating, can obtain comparatively accurate linear compensation coefficient, make the effect of linear Identification and compensation and the signal bandwidth of digital pre-distortion unit output irrelevant, improved the applicability of system; Realized digital pre-distortion unit output signal is carried out to good linear compensation, made digital pre-distortion unit calculate pre-distortion coefficients time error less, final reduction launched distortion; And the error signal calculation linear compensation coefficient of the base station down signal message of time delay has been removed in utilization, greatly shortened the time of linear Identification, improved the operating efficiency of system; By increasing switch selected cell, can select according to actual needs to carry out the contrast signal of linear Identification, the degree of freedom is high, and applicability is strong; Linear compensation unit is all set in forward path and feedback control loop, can improves the effect of linear compensation, lower the error while calculating pre-distortion coefficients, final minimizing launched distortion.

One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.

A kind of discrimination method, the Apparatus and system that above the embodiment of the present invention are provided are described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.

Claims

1. a discrimination method, is characterized in that, comprising:

2. the method for claim 1, it is characterized in that, described the second input signal is that the first feedback signal is through after decimal time delay, carry out with the base station down signal of integer time delay the second feedback signal generating after phase and magnitude registration process, wherein, described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.

3. the method for claim 1, it is characterized in that, described the second input signal is that the first feedback signal is through after decimal time delay, carry out amplitude and phase alignment processing with the base station down signal of integer time delay, carry out subtraction process with the base station down signal of described integer time delay again, remove the error signal generating after the base station down signal message of described integer time delay, wherein, described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.

4. the method as described in claim 2 or 3, it is characterized in that, described transmitting as described transmitter unit is according to closing the signal that road signal is changed and exported, wherein, described in, closing road signal is the signal of output after described adder unit is added the described Injection Signal of the base station down signal after linear compensation of the linear compensation unit output receiving and the generation of described injection unit.

5. the method as described in claim 1-4 any one, is characterized in that, the band of described Injection Signal is wider than bandwidth threshold K, and described bandwidth threshold K is greater than 0.

6. a device for identifying, is characterized in that, comprising:

7. device as claimed in claim 6, it is characterized in that, described the second input signal is that the first feedback signal is through after decimal time delay, carry out with the base station down signal of integer time delay the second feedback signal generating after phase and magnitude registration process, wherein, described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.

8. device as claimed in claim 6, it is characterized in that, described the second input signal is that the first feedback signal is through after decimal time delay, carry out amplitude and phase alignment processing with the base station down signal of integer time delay, carry out subtraction process with the base station down signal of described integer time delay again, remove the error signal generating after the base station down signal message of described integer time delay, wherein, described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.

9. install as claimed in claim 7 or 8, it is characterized in that, described transmitting as described transmitter unit is according to closing the signal that road signal is changed and exported, wherein, described in, closing road signal is the signal of output after described adder unit is added the described Injection Signal of the base station down signal after linear compensation of the linear compensation unit output receiving and the generation of described injection unit.

10. the device as described in claim 6-9 any one, is characterized in that, the band of described Injection Signal is wider than bandwidth threshold K, and described bandwidth threshold K is greater than 0.

11. 1 kinds of identification systems, is characterized in that, comprising:

Inject unit, for exporting described Injection Signal;

Decimal time delay and the width unit that aligns, for receiving the first feedback signal of the base station down signal of integer time delay and the output of described feedback receiving element, will after described the first feedback signal decimal time delay with after the amplitude of the base station down signal of described integer time delay and phase alignment, generate the second feedback signal output;

12. systems as claimed in claim 11, is characterized in that, described the second input signal is described decimal time delay and width the second feedback signal of unit output that aligns, or be the error signal that described subtrator is exported.

13. systems as described in claim 11 or 12, is characterized in that, described integer delay unit is specifically for carrying out the integer time delay of an integer clock cycle to described base station down signal; Described decimal time delay and width align unit specifically for the decimal time delay of the first feedback signal of described feedback receiving element output being carried out to a non-integer clock cycle so that amplitude and the phase alignment of the base station down signal of the integer time delay that the first feedback signal of described feedback receiving element output and described integer delay unit are exported.

14. systems as described in claim 11-13 any one, is characterized in that, described system also comprises:

15. systems as described in claim 11-14 any one, is characterized in that, described system also comprises:

16. systems as described in claim 12-15 any one, is characterized in that, described the first linear compensating unit and described digital pre-distortion unit integrate or arrange separately.

17. 1 kinds of device for identifying, is characterized in that, comprising:

Processor and the memory matching with described processor;

18. devices as claimed in claim 17, it is characterized in that, described the second input signal is that the first feedback signal is through after decimal time delay, carry out with the base station down signal of integer time delay the second feedback signal generating after phase and magnitude registration process, wherein, described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.

19. devices as claimed in claim 18, it is characterized in that, described the second input signal is that the first feedback signal is through after decimal time delay, carry out amplitude and phase alignment processing with the base station down signal of integer time delay, carry out subtraction process with the base station down signal of described integer time delay again, remove the error signal generating after the base station down signal message of described integer time delay, wherein, described the first feedback signal is for feedback receiving element is according to the produced signal that transmits of the transmitter unit output receiving.

20. devices as described in claim 18 or 19, it is characterized in that, described transmitting as described transmitter unit is according to closing the signal that road signal is changed and exported, wherein, described in, closing road signal is the signal of output after described adder unit is added the described Injection Signal of the base station down signal after linear compensation of the linear compensation unit output receiving and the generation of described injection unit.

21. devices as described in claim 17-20 any one, is characterized in that, the band of described Injection Signal is wider than bandwidth threshold K, and described bandwidth threshold K is greater than 0.

22. 1 kinds of base stations, is characterized in that, comprising:

System as described in claim 11-16 any one.