CN103517390A - Power control method and device - Google Patents
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Abstract
The invention discloses a power control method and device. The method comprises: for one signal transmission channel, performing gain adjustment on carrier signals with at least two patterns which are transmitted in the signal transmission channel respectively and performing combination processing on the carrier signals on which the gain adjustment has been performed and thus a combined signal is obtained; determining a forward power value and a feedback power value corresponding to the combined signal; according to the forward power value and the feedback power value, determining a power output value corresponding to the signal transmission channel; and according to the obtained power output value, performing power control on the signal transmission channel. Through technical scheme in the invention, the accuracy of performing the power control on the signal transmission channel is better improved.
Description
Technical field
The present invention relates to communication technical field, especially relate to a kind of Poewr control method and device.
Background technology
In the communication system coexisting in multi-modulation scheme radiofrequency signal, the Main Resources in down link is the carrier power of base station transmitting different systems.Wherein, maximum carrier power has limited the coverage of number of users, quality of service and base station transmit signals that can be serviced.Exactly radio frequency (RF, the Radio Frequency) power of output is reported to base station, makes base station can effectively utilize existing power, thus can saving resource and also can reduce electromagnetic interference in wireless communications environment etc.
At global system for mobile communications (GSM, Global System for Mobile communications), Wideband Code Division Multiple Access (WCDMA) communication system (WCDMA, Wideband Code Division Multiple Access), orthogonal FDM communication system (OFDM, Orthogonal Frequency Division Multiplexing) and use Multi-Carrier Power Amplifier (MCPA, Multi-Carrier Power Amplifier) in communication system, according to third generation partner program (3GPP, The 3rd Generation Partnership Project) regulation, for the fast power for uplink and downlink link in each communication system, control by standardization, but because wireless communications environment is time dependent, for example in a certain duration, in base station, do not have enough carrier powers to meet all users' business demand, need to take Poewr control method, to realize, with quick acting (fast action), in a short time scale, process this problem.
While carrying out power control for a kind of communication system of standard in prior art, as shown in Figure 1, main processing procedure is: the carrier signal of a kind of standard of launching for the base station of transmitting in a signal transmission passage, by frequency-conversion processing and gain, adjust, obtain forward power value P1 corresponding to carrier signal after adjusting, carrier signal after gain is adjusted is processed by digital pre-distortion, digital-to-analogue conversion process after by the output of splitter, be coupled in feedback link and transmit, and pass through analog-to-digital conversion in feedback link after, obtain feedback power value P2 corresponding to this carrier signal, finally by the forward power value P1 of acquisition and feedback power value P2 by computing, determine the output power value of the transmission channel of the carrier signal of transmitting this kind of standard, the output power value of this passage of determining is reported to upper layer software (applications) to carry out power control.But signal of communication is in transmitting procedure, because the variation of communication environment can produce interference signal, interference signal can transfer to feedback link together with signal of communication, making the final performance number obtaining not is real performance number, while making, according to the performance number obtaining, signal transmission passage is carried out to power control, accuracy is lower.
In sum, the Poewr control method proposing in prior art is that the radiofrequency signal based on a kind of standard is carried out power control, in the communication system of multimode communication signal coexistence, the Poewr control method that adopts prior art to propose, when corresponding signal transmission passage is carried out to power control, accuracy is lower.
Summary of the invention
The embodiment of the present invention provides a kind of Poewr control method and device, can improve preferably accuracy when signal transmission passage is carried out to power control.
The technical scheme that the embodiment of the present invention provides is as follows:
A kind of Poewr control method, comprise: for a signal transmission passage, to the adjustment that gains respectively of the carrier signal of at least two kinds of standards transmitting in described signal transmission passage, and the carrier signal gaining after adjusting is closed to road and process to obtain and close road signal; Described in determining, close forward power value and the feedback power value that road signal is corresponding; According to described forward power value and the described feedback power value determined, determine the power stage value that this signal transmission passage is corresponding, according to the power stage value obtaining, this signal transmission passage is carried out to power control.
A kind of output control device, comprise: close signal acquisition unit, road, be used for for a signal transmission passage, to the adjustment that gains respectively of the carrier signal of at least two kinds of standards transmitting in described signal transmission passage, and the carrier signal gaining after adjusting is closed to road and process to obtain and close road signal; Determining unit, for obtaining He road signal and close forward power value and the feedback power value that road signal is corresponding described in determining according to closing signal acquisition unit, road; Power stage value obtains unit, for described forward power value and the described feedback power value of determining according to determining unit, determines the power stage value that this signal transmission passage is corresponding, according to the power stage value obtaining, this signal transmission passage is carried out to power control.
Adopt technique scheme, in the communication system coexisting at multiple types signal of communication, for a signal transmission passage, the carrier signal of the different systems transmitting in this signal transmission passage is gained to adjust after process on Ji He road and obtain and close road signal, and close forward power value and the feedback power value that road signal is corresponding described in determining, finally by forward power value and feedback power value, determine the power stage value that this signal transmission passage is corresponding, and according to the power stage value obtaining, this signal transmission passage is carried out to power control, thereby can realize preferably the in the situation that of multimode communication signal coexistence, the accuracy of power control is carried out in raising to signal transmission passage.
Accompanying drawing explanation
Fig. 1 is in prior art, the power control principle schematic diagram of proposition;
Fig. 2 is in the embodiment of the present invention one, the Poewr control method flow chart of proposition;
Fig. 3 is in the embodiment of the present invention one, and the structure of the output control device of proposition forms schematic diagram;
Fig. 4 is in the embodiment of the present invention two, the power control principle schematic diagram of proposition;
Fig. 5 is in the embodiment of the present invention two, the RRU working-flow figure of proposition;
Fig. 6 is in the embodiment of the present invention two, the Poewr control method flow chart of proposition;
Fig. 7 is in the embodiment of the present invention two, the frequency hopping process flow figure of proposition;
Fig. 8 is in the embodiment of the present invention two, the equaliser structure schematic diagram that the transversal filter of proposition forms;
Fig. 9 a is in prior art, the wave testing figure in the 150MHz feedback bandwidth of proposition;
Fig. 9 b is in the embodiment of the present invention two, and 8 groups of coefficients of employing of proposition are realized the synthetic response design sketch of equalizer;
Fig. 9 c is in the embodiment of the present invention two, and 12 groups of coefficients of employing of proposition are realized the synthetic response design sketch of equalizer.
Embodiment
In prior art, Poewr control method is to carry out for a kind of communication system of standard, in signal transmission passage, only has a kind of carrier signal transmission of standard, cannot realize in a signal transmission passage, if while having the signal of communication of multiple different systems to coexist, determine accurately the power stage value that this signal transmission passage is corresponding, while making this signal transmission passage carry out power adjustment, the problem that accuracy is lower, the technical scheme that the embodiment of the present invention proposes here, in a signal transmission passage, first the carrier signal of the different systems transmitting in this signal transmission passage is closed to road processing and obtain closing road signal, then by determining forward power value and the feedback power value of Gai He road signal, obtain the power stage value that this signal transmission passage is corresponding, according to the power stage value obtaining, this signal transmission passage is carried out to power control, can realize preferably when multimode communication signal transmits jointly in a signal transmission passage, the accuracy of power adjustment is carried out in raising to this signal transmission passage.
Below in conjunction with each accompanying drawing, embodiment of the present invention technical scheme main realized to principle, embodiment and the beneficial effect that should be able to reach is at length set forth.
Embodiment mono-:
The embodiment of the present invention one proposes a kind of Poewr control method here, and as shown in Figure 2, detailed process is as follows:
It is that the carrier signal of GSM standard is, carrier signal of WCDMA standard etc. that the carrier signal of the different systems that wherein, launch base station can be, but not limited to.
It should be noted that, it is example that the embodiment of the present invention only be take a signal transmission passage here, elaborates the Poewr control method that the embodiment of the present invention proposes here, for other signal transmission passages, all adopts identical processing method.
Wherein, determine respectively the gain difference corresponding with each carrier signal, then for a carrier signal, according to the gain difference to should carrier signal of determining, this carrier signal is carried out to the first gain adjustment.
Particularly, the embodiment of the present invention one be take a carrier signal here and is described in detail as example, for all carrier signals of transmitting in signal transmission passage, can carry out the first gain adjustment according to identical processing method.For a carrier signal, at least one that can adjust in difference and pilot frequency point gain difference by different standard gain difference corresponding to this carrier signal, sub-carrier static power determined the gain difference that this carrier signal is corresponding, wherein, different standard gain difference refers to according to standard corresponding to each carrier signal of transmitting in signal transmission passage to be determined, pilot frequency point gain difference refers to according to frequency corresponding to each carrier signal of transmitting in signal transmission passage to be determined.
Particularly, can adopt following method, according to the different standard gain difference corresponding with this carrier signal, determine the gain difference that this carrier signal is corresponding: determine respectively default gain adjustment value corresponding to each carrier signal of transmitting in described signal transmission passage, and default gain adjustment value corresponding to the carrier signal of choosing a kind of standard is as calibration value, determine between the default gain adjustment value that calibration value is corresponding with this carrier signal and ask difference, obtain different standard gain difference corresponding to this carrier signal, using the different standard gain difference obtaining as the gain difference corresponding with this carrier signal.For example, suppose to have the carrier signal of two kinds of standards, wherein the default gain adjustment value of the corresponding carrier signal A of standard A is-38.288, the default gain adjustment value of the carrier signal B that standard B is corresponding is-23.810, default gain adjustment value-38.288 that carrier signal A is corresponding if select are as calibration value, carrier signal B with respect to the different standard gain difference of this calibration value be-6.9(is for ease of statistics, acquired results remains to after decimal point 1).
Particularly, can adjust difference by sub-carrier static power corresponding to this carrier signal and determine the gain difference that this carrier signal is corresponding, concrete grammar is as follows: if receive, this carrier wave is carried out to sub-carrier static power and adjust instruction, determine sub-carrier static power adjustment difference corresponding to this carrier wave comprising in sub-carrier static power adjustment instruction, described static power is adjusted to difference as the gain difference corresponding with this carrier signal.For example, in the middle of running, the sub-carrier power control instruction that can assign according to upper layer software (applications) (static power some carrier waves being issued is adjusted instruction), obtain the sub-carrier static power corresponding with this carrier wave comprising in this instruction and adjust difference, suppose that a certain carrier signal A is issued to sub-carrier static power adjusts instruction, make the static power of this carrier signal A be adjusted to-2.3, can be using-2.3 as the gain difference corresponding with this carrier signal.
Particularly, can also determine the gain difference corresponding with this carrier signal by pilot frequency point gain difference corresponding to this carrier signal, specific as follows: if receive, this carrier signal to be carried out to frequency hopping power control instruction, determine the pilot frequency point gain difference that this carrier signal is corresponding, using described pilot frequency point gain difference as the gain difference corresponding with this carrier signal.For example, suppose that carrier wave A is 6.8 in performance number corresponding to frequency f1, in performance number corresponding to frequency f2, be 7.4, carrier wave A transmits in signal transmission passage with frequency f1, at a certain time slot, receive frequency hopping instruction, need carrier wave A to move to frequency f2 from frequency f1, then with the frequency f2 after moving, continue to transmit in signal transmission passage, now, to pilot frequency point gain difference that should carrier signal A, be 7.4-6.8=0.6, can be using 0.6 as the gain difference corresponding with this carrier signal.
Particularly, can consider different standard gain difference, sub-carrier static power that should carrier signal be adjusted to one or more in difference and pilot frequency point gain difference, determine the gain difference that this carrier signal is corresponding.Can be, but not limited to adopt following several method:
The first method: different standard gain difference and sub-carrier static power adjustment difference that this carrier signal is corresponding are done to subtraction, and the difference of trying to achieve is as the gain difference corresponding with this carrier signal.
Second method, is added different standard gain difference corresponding to this carrier signal and pilot frequency point gain difference, try to achieve with the value conduct gain difference corresponding with this carrier signal.
The third method, adjusts difference by sub-carrier static power corresponding to this carrier signal and is added with pilot frequency point gain difference, try to achieve with the value conduct gain difference corresponding with this carrier signal.
The above-mentioned wherein three kinds of modes that only provided, certainly, can also there be other compound modes to realize, here repeat no more, a kind of preferably implementation, different standard gain difference corresponding to this carrier signal can be deducted to sub-carrier static power and adjust difference, then be added with pilot frequency point gain difference the gain difference corresponding with this carrier signal with value conduct obtaining.
By above-mentioned variety of way, can obtain, to gain difference that should carrier signal, after obtaining gain difference, need to carrying out the first gain adjustment to this carrier signal, can adopt 1 pair of this carrier signal of following formula to carry out the first gain adjustment:
G (carrier)=Gd * 10
(E/20) formula 1
Wherein, G (carrier) is that each carrier signal is carried out the numerical value after the first gain adjustment, and Gd is that scaled values is adjusted in the gain of presetting, and E is the gain difference of determining.
Wherein, carry out the whole carrier signals after the first gain adjustment, gain corresponding to each carrier signal be all align, and all carrier signal Zuo He road after alignment is processed.
Wherein, to obtain He road signal after the second gain is adjusted (for ease of setting forth, the embodiment of the present invention gains involutory road signal here to adjust and is referred to as the second gain adjustment), by coupler, be coupled in feedback link, and in feedback link, transmission He road signal is carried out to equilibrium treatment, obtain equilibrium treatment signal, determine feedback power value corresponding to described equilibrium treatment signal.Particularly, can by transmitting the frequency response fluctuation of He road signal in wide-band in feedback link, reduce based on frequency-domain equalization technology, obtain equilibrium treatment signal.Equilibrium refers to the equilibrium to the characteristic of channel, adopts equalizer, and the equalizer of reaching the same goal produces the characteristic contrary with channel, be used for offsetting channel time become the interference that Multipath Transmission characteristic causes.
Particularly, according to described forward power value and described feedback power value, determine that respectively the method for the corresponding power stage value of each carrier signal can be, but not limited to adopt following two kinds: can adopt following formula 2
First method: adopt following formula 2 to determine the corresponding power stage value of each carrier signal
TSSI N_I (dBm)=10*log (IQ Data)+Kdl_value+ (cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB)) – attN_I formula 2
Wherein, TSSIN_I is the power stage value of I carrier wave in N signal transmission passage, IQ Data is the base band power mean value of presetting this carrier wave counting in duration, Kdl_value is to default gain adjustment value that should carrier wave, cfrF_A-cfrDB is to gain adjustment value that should signal transmission passage, gainF is the difference of forward power value and feedback power value, fSigPwDB-feedPwDB is default forward power value and the difference of feedback power value, and attN_I is the default automatic pad value of I carrier wave in N signal transmission passage.
Second method: if receive, signal transmission passage is carried out to static power and adjust instruction, according to described forward power value, feedback power value and static power adjusted value, determine respectively the corresponding power stage value of each carrier signal, particularly, can determine by following formula 3 the corresponding power stage value of each carrier signal:
TSSI N_I (dBm)=10*log (IQ Data)+Kdl_value+ (cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB)) – attN_I-staticAttF_N formula 3
Wherein, TSSI N_I is the power stage value of I carrier wave in N signal transmission passage, IQData is the base band power mean value of presetting this carrier wave counting in duration, Kdl_value is to default gain adjustment value that should carrier wave, cfrF_A-cfrDB is to gain adjustment value that should signal transmission passage, gainF is the difference of forward power value and feedback power value, fSigPwDB – feedPwDB is default forward power value and the difference of feedback power value, attN_I is the default automatic pad value of I carrier wave in N signal transmission passage, staticAttF_N is the static power adjusted value that this signal transmission passage is corresponding.
Wherein, the corresponding power stage value of whole carrier signals of determining is added to summation, obtains the power stage value that signal transmission passage is corresponding.
Preferably, if receive, signal transmission passage is carried out to static power and adjust instruction, according to described forward power value, described feedback power value and static power adjusted value, determine respectively the corresponding power stage value of each carrier signal.
Particularly, static power adjusted value is predefined or determines according to predefined static power adjusted value and adjustment step value.
Preferably, can by calculating the difference of forward power and feedback power, determine whether to meet the precision of power output, be specially:
Suppose that power stage value corresponding to signal transmission passage calculating is K, calculating gained loop gain is that Ka(is the difference of forward power and feedback power).
When Ka is during in (K ± PowerAccuracy) dB scope, in the time of within PowerAccuracy threshold range, do not carry out power control, wherein PowerAccuracy refers to power precision.Preferably, PowerAccuracy can value be 0.25.
As the dB of Ka≤(K-LNAthreshhold), while surpassing LNAthreshhold value, produce low gain alarm.Wherein LNAthreshhold is low gain threshold value.Preferably, the value of LNAthreshhold can be 6.
When Ka is greater than (K+PowerAccuracy) dB or when Ka is less than (K-PowerAccuracy) dB, carries out power control, the adjustment stepping that the power of selection is controlled can be 0.3dB or undetermined.Adjusted Dian Weihe road signal before carrying out linear pre-distortion.Preferably, can carry out power control according to feedback temperature compensation table, calibration temperature and feedback ATT precision.
Correspondingly, the embodiment of the present invention two proposes a kind of output control device here, as shown in Figure 3, comprising:
Close signal acquisition unit, road 301, be used for for a signal transmission passage, to the adjustment that gains respectively of the carrier signal of at least two kinds of standards transmitting in described signal transmission passage, and the carrier signal gaining after adjusting is closed to road and process to obtain and close road signal.
Particularly, the above-mentioned signal acquisition unit, road 301 that closes, specifically for determining respectively the gain difference corresponding with each carrier signal; For a carrier signal, according to determine to gain difference that should carrier signal to the adjustment that gains of this carrier signal.
Particularly, the above-mentioned signal acquisition unit, road 301 that closes, specifically for for a carrier signal, at least one that adjust in difference and pilot frequency point gain difference by different standard gain difference corresponding to this carrier signal, sub-carrier static power determined the gain difference that this carrier signal is corresponding, wherein said different standard gain difference is to determine according to standard corresponding to each carrier signal of transmitting in signal transmission passage, and described pilot frequency point gain difference is to determine according to frequency corresponding to each carrier signal of transmitting in signal transmission passage.
Particularly, the above-mentioned signal acquisition unit, road 301 that closes, specifically for determining respectively default gain adjustment value corresponding to each carrier signal of transmitting in described signal transmission passage, and choose default gain adjustment value corresponding to a kind of carrier signal of standard as calibration value; Determine between the default gain adjustment value that calibration value is corresponding with this carrier signal and ask difference, obtain different standard gain difference corresponding to this carrier signal, using the different standard gain difference obtaining as the gain difference corresponding with this carrier signal; And if receive and this carrier wave is carried out to sub-carrier static power adjust instruction, determine sub-carrier static power adjustment difference corresponding to this carrier wave comprising in sub-carrier static power adjustment instruction, described static power is adjusted to difference as the gain difference corresponding with this carrier signal; And if receive this carrier signal carried out to frequency hopping power control instruction, determine the pilot frequency point gain difference that this carrier signal is corresponding, using described pilot frequency point gain difference as the gain difference corresponding with this carrier signal.
Particularly, the above-mentioned signal acquisition unit, road 301 that closes, adjusts difference specifically for described different standard gain difference being deducted to sub-carrier static power, then is added with pilot frequency point gain difference the gain difference corresponding with this carrier signal with value conduct obtaining.
Particularly, the above-mentioned signal acquisition unit, road 301 that closes, specifically for adopting following formula to the adjustment that gains of each carrier signal:
G(carrier)＝Gd×10
(E/20)；
Wherein, G (carrier) is the numerical value that each carrier signal gains after adjusting, and Gd is that scaled values is adjusted in the gain of presetting, and E is the gain difference of determining.
Determining unit 302, for obtaining He road signals and close forward power value and the feedback power value that road signal is corresponding described in determining according to closing signal acquisition unit, road 301.
Particularly, above-mentioned determining unit 302, is coupled in feedback link after gain is adjusted specifically for closing road signal described in general, and will in feedback link, transmit He road signal carries out equilibrium treatment, obtain equilibrium treatment signal, determine feedback power value corresponding to described equilibrium treatment signal.
Particularly, above-mentioned determining unit 302, specifically for based on frequency-domain equalization technology, reduces transmitting the frequency response fluctuation of He road signal in wide-band in feedback link, obtains equilibrium treatment signal.
Power stage value obtains unit 303, for described forward power value and the described feedback power value of determining according to determining unit, determine the power stage value that this signal transmission passage is corresponding, according to the power stage value obtaining, this signal transmission passage is carried out to power control.
Particularly, above-mentioned power stage value obtains unit 303 specifically for according to described forward power value and described feedback power value, determines respectively the corresponding power stage value of each carrier signal; The corresponding power stage value of whole carrier signals of determining is added to summation, obtains the power stage value that signal transmission passage is corresponding.
Particularly, above-mentioned power stage value obtains unit 303, specifically adopts following formula, according to described forward power value and described feedback power value, determines respectively the corresponding power stage value of each carrier signal:
TSSI N_I(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))–attN_I;
Wherein, TSSI N_I is the power stage value of I carrier wave in N signal transmission passage, IQ Data is the base band power mean value of presetting this carrier wave counting in duration, Kdl_value is to default gain adjustment value that should carrier wave, cfrF_A-cfrDB is to gain adjustment value that should signal transmission passage, gainF is the difference of forward power value and feedback power value, fSigPwDB – feedPwDB is default forward power value and the difference of feedback power value, and attN_I is the default automatic pad value of I carrier wave in N signal transmission passage.
Particularly, if obtaining unit, above-mentioned power stage value, specifically for receiving, signal transmission passage is carried out to static power adjustment instruction, according to described forward power value, described feedback power value and static power adjusted value, determine respectively the corresponding power stage value of each carrier signal; The corresponding power stage value of whole carrier signals of determining is added to summation, obtains the power stage value that signal transmission passage is corresponding.
Wherein, static power adjusted value is predefined or determines according to predefined static power adjusted value and adjustment step value.
Particularly, above-mentioned power stage value obtains unit also for passing through following formula, determines the corresponding power stage value of each carrier signal:
TSSI N_I(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))–attN_I-staticAttF_N
Wherein, TSSI N_I is the power stage value of I carrier wave in N signal transmission passage, IQData is the base band power mean value of presetting this carrier wave counting in duration, Kdl_value is to default gain adjustment value that should carrier wave, cfrF_A-cfrDB is to gain adjustment value that should signal transmission passage, gainF is the difference of forward power value and feedback power value, fSigPwDB – feedPwDB is default forward power value and the difference of feedback power value, attN_I is the default automatic pad value of I carrier wave in N signal transmission passage, staticAttF_N is the static power adjusted value that this signal transmission passage is corresponding.
Embodiment bis-:
Further, on the basis of above-described embodiment one, the embodiment of the present invention two is here with in RF remote (RRU) communication system, and the carrier signal of the different systems receiving in a signal transmission passage is that technical scheme that example proposes here to the present invention is done further and elaborated.
Wherein, as shown in Figure 4, the power control principle figure proposing here for the embodiment of the present invention.The brief description that table 1 is made for some the composition modules in corresponding diagram 4.It should be noted that, the embodiment of the present invention two only be take a signal transmission passage here as example is described in detail, and for the Poewr control method of other signal transmission passages, all can adopt identical technical scheme.
Table 1
In RRU system, first the course of work of whole RRU system is made to brief description,
As shown in Figure 5, under initial launch condition, after RRU system powers on, start, need the operation of execution as follows:
Wherein, for power control process, need to obtain analog attenuator (Tx att, Attenuator) the constant power control information of frequency, transmission bandwidth, carrier type and the down link of carrier signal.
Particularly, according to the power control information obtaining, determine more following calibration parameters (being the foundation that arranges of some preset values), for example determine analog attenuator (ATT, Attenuator) numerical value, comprises the initial value of forward power, the initial value of feedback power etc.The default gain adjustment value (K value) that each carrier signal is corresponding, the carrier gains value (can obtain in the type of carrier wave and the corresponding relation of carrier gains value) that each carrier signal is corresponding.Particularly, when determining the corresponding carrier gains value of each carrier signal, if what RRU system received is the different carrier signal of GSM standard frequency, directly use predefined numerical value, for example directly use default merit to divide yield value (duplexgain), preferably, this duplexgain numerical value and 100 can be divided by and deduct 10 again.On the contrary, if what RRU system received is not the carrier signal of GSM standard, need to calculate two numerical value, one is that the duplexgain numerical value in this transmission bandwidth is as mean value according to transmission bandwidth, and another one parameter is the fixing signal gain value of presetting.
Step 54, after having arranged, checks the on off state of each signal transmission passage, and according on off state corresponding signal transmission passage is carried out to power control.
Preferably, the gain adjustment value (as the GainAdjust1 in Fig. 4) of base band can be set, for example, can be set to 0 by initial value, know according to default step value and increase progressively gradually, till being incremented to 4 o'clock.Step value can be set to 4dB, 3dB, 1dB, 0.5dB.
It should be noted that, after above-mentioned steps completes, just can enter normal power control flow, determine forward power value and feedback power value, then by determining the power stage value that signal transmission passage is corresponding, report upper layer application, follow-uply can to signal transmission passage, carry out power control according to the result reporting.
Power control schematic diagram based on Fig. 4, elaborates the Poewr control method that the embodiment of the present invention proposes here below, and as shown in Figure 6, detailed process is as follows:
Step 61, the carrier signal A ~ D of three kinds of different systems of reception base station transmitting, removes respectively frequently and processes the carrier signal A ~ D receiving.
For a signal transmission passage in RRU system, receive the carrier signal A ~ D of base station transmitting, specifically as shown in Figure 4, here the power control principle figure in RRU communication system proposing for the embodiment of the present invention two, in the embodiment of the present invention two subsequent steps, the technical scheme that the Fig. 4 of still take proposes the present invention as example is made and being elaborated.Suppose the carrier signal of three kinds of different systems of base station transmitting, for each standard, the carrier signal of frequency that can be corresponding different, for example, the carrier signal A of GSM standard can be to there being 3 different frequencies.Carrier signal A can be take an arbitrary frequency and be transmitted in signal transmission passage as base station.
Step 62, carries out respectively the first gain adjustment to the carrier signal of transmitting in this signal transmission passage.
Wherein, the carrier signal A ~ D transmitting in a signal transmission passage is the single carrier power of correspondence self separately, so need to carry out registration process to the power gain corresponding to each carrier signal of carrying out after frequency-conversion processing.
Particularly, determine respectively the gain difference corresponding with each carrier signal, then for a carrier signal, according to the gain difference to should carrier signal of determining, this carrier signal is carried out to the first gain adjustment.
Wherein, gain difference corresponding to each carrier signal can be determined according to different standard gain difference corresponding to this carrier signal, sub-carrier static power adjustment difference and pilot frequency point gain difference, particularly, determine that gain difference embodiment corresponding to each carrier signal refers to elaborating in above-described embodiment one, repeats no more here.
Preferably, in the technical scheme that the embodiment of the present invention proposes, also increased the respective handling when receiving frequency hopping instruction here, specifically as shown in Figure 7, having comprised:
Step 71, receives frequency hopping instruction.For example, FPGA puies forward the frequency hopping information that the first two time slot receives DU.
Step 72, according to frequency hopping instruction, monitors some parameter setting in advance, and reads the gain compensation value of the frequency that corresponding carriers signal is corresponding, in frequency hopping time slot arrives previous time slot constantly, the numerical value reading is written in DUC gain.
Step 73, continues to wait for next frequency point information, and returns to execution step 71.
Preferably, in the technical scheme that the embodiment of the present invention proposes here, also proposed when single carrier signal being carried out to static power adjustment, corresponding power stage also can produce correspondingly and change, and specifically makes and elaborating below.
A kind of preferably implementation, the embodiment of the present invention two here, the gain difference of corresponding each carrier wave, employing deducts sub-carrier static power by different standard gain difference corresponding to this carrier signal and adjusts difference, then is added with pilot frequency point gain difference the gain difference corresponding with this carrier signal with value conduct obtaining.
Particularly, the different standard gain difference of corresponding each carrier signal can adopt following method to determine, as shown in table 1, the performance number that can select the carrier signal A under GSM standard is fiducial value, performance number corresponding to each carrier signal under other standard (WCDMA and OFDM) be take to the fiducial value chosen and do normalized as benchmark.Particularly, table 2 has provided three kinds of lower 9 kinds of carrier signals of standard altogether.The quantity of each carrier signal and corresponding frequency (illustrating by frequency in table 2) are also incomplete same.
Table 2
In above-mentioned table 2, Kdownlink represents default gain adjustment value that should carrier wave.The input power value of carrier signal during RF Maximum Power Output (dBfs in table can adopt following formula 4 to determine:
P
out(carrier)=10 * lg[P
iQ(carrier)]+K
dLformula 5
Wherein, P
out(carrier) refer to the power output of antenna opening, the every carrier wave peak power output of the RF P in corresponding table 1
iQ(carrier) corresponding digital power I2+Q2 during the RF Maximum Power Output in corresponding table 2.
Preferably, I2+Q2 can pass through statistics by upper layer software (applications) and obtain, for example, can be an average of the I2+Q2 in default duration.For example, the every 2ms of field programmable gate array (FPGA, Field programmable gate array) can add up once the base band power value of certain carrier wave.In 2ms, only add up 2048 IQ data, can calculate 1024 (I
2+ Q
2) value, by these numerical value summations, and then obtain (I divided by 1024
2+ Q
2) average, then the average obtaining is stored in register.Like this, according to identical method, in 20ms, just can obtain 10 differences or identical (I
2+ Q
2) average, after obtaining these 10 numerical value, then ask for the mean value of 10 numerical value, just can obtain (I in 20ms
2+ Q
2) average.
Wherein, when determining respectively different standard gain difference corresponding to each carrier signal, here the carrier signal providing in table 1 of take is example, Kdownlink value-38.288 corresponding to carrier signal of supposing selected GSM standard are calibration value, by the Kdownlink value of each carrier signal of correspondence of providing in table 1, poor by doing between Kdownlink value corresponding to each carrier signal and selected calibration value, obtain different standard gain difference that should carrier signal.As shown in table 3:
Table 3
According to the result drawing in above-mentioned table 3, the carrier signal of different systems is carried out to the first gain adjustment, for carrier signal OFDM 20MHz, while carrying out the first gain adjustment, can be using the different standard gain difference of correspondence as the gain difference corresponding with it.Adopt 1 couple of this carrier signal OFDM 20MHz of formula proposing in above-described embodiment one to carry out the first gain adjustment.While gaining adjustment for other carrier signals in table 2, processing procedure and carrier signal OFDM 20MHz are basic identical, repeat no more here.
Step 63, closes road and processes to obtain and close road signal carrying out whole carrier signals after the first gain adjustment.
As shown in Figure 4, four carrier signals carry out respectively closing road processing after the first gain adjustment in reference.Close processing Hou He road, road signal and carry out the second gain adjustment, the object that second gains adjusts is that the carrier signal of controlling after the first gain adjustment is carried out linear pre-distortion ，He road processing before baseband gain corresponding to each carrier signal afterwards.
Step 64, determines and closes forward power value and the feedback power value that road signal is corresponding.
Before entering feedback link with reference to the road of ，Gai He shown in Fig. 4 signal, after recording forward power value ，Bing He road signal that should be corresponding with road signal being processed by feedback link, record to should with the feedback power value of road signal.
In RRU system, generally all adopt digital pre-distortion technology to realize the signal of power amplifier transmission is carried out to linearization process, here in the Poewr control method proposing in the embodiment of the present invention, use feedback link, can effectively detect the power fluctuation of antenna for base station mouth.
Preferably, in order to guarantee to reflect really performance number corresponding after close road signal transmits in feedback link, in the technical scheme that the embodiment of the present invention proposes, in feedback path, increased equalizer here.Equalizer can reduce the interference of the involutory road of the signal fluctuation signal in feedback link, sort signal fluctuation may be to be caused by hardware, also may be to process and cause by numeric field signal, adopt frequency-domain equalization technology, make to comprise that total transfer function of the whole system of equalizer can meet the condition of undistorted transmission, comprise and proofread and correct respectively amplitude-frequency characteristic and group delay characteristic, preferably, the embodiment of the present invention two adopts the mode of sequential equilibrium to realize here.
An implementation, as shown in Figure 8, for the embodiment of the present invention two proposes a kind of equaliser structure schematic diagram being comprised of transversal filter here.By adjusting the coefficient of equalizer, obtain different results.Do a contrast below, Fig. 9 a is in prior art, in feedback link, while not adopting equalizer, wave testing figure in 150MHz feedback bandwidth, Fig. 9 b and Fig. 9 c are respectively after the employing equalizer that the embodiment of the present invention two proposes here, wave testing figure in 150MHz feedback bandwidth, it should be noted that, the different coefficient that Fig. 9 b and Fig. 9 c adopt respectively, respectively 12 groups of 8 combinations, as can be seen from the figure, adopt the equalizer of 8 groups of coefficients and the equalizer of 12 groups of coefficients of employing, handled effect is completely different, the equalizer of 12 groups of coefficients, portfolio effect adopts the portfolio effect of the equalizer of 12 groups of coefficients obviously to improve relatively, particularly, in actual applications, can be according to different requirements, the coefficient of equalizer is carried out to concrete setting.
Step 65, according to definite forward power value and feedback power value, determines the power stage value that this signal transmission passage is corresponding.
First determine power stage value corresponding to all carrier signals in this signal transmission passage, sub-carrier output power signal value, then, according to power stage value corresponding to each carrier signal of determining, determines the power stage value that this signal transmission passage is corresponding.
Preferably, the technical scheme that the embodiment of the present invention proposes here, in RRU system, has also increased signal transmission passage has been carried out to static power adjustment function.Wherein, predetermined the power span of control of the multi-modulation scheme carrier signal under rate of static power, specific as follows:
40W/path(or carrier) case:0~12dB range；
20W/path(or carrier) case:0~12dB range；
13W/path(or carrier) case:0~12dB range；
10W/path(or carrier) case:0~12dB range。
For example, the requirement of testing under GSM standard rate of static power, need to complete by forward direction, feedback analog ATT in DPD loop is set (arrange after simulation ATT, must again train DPD coefficient or load the pre-training coefficient of different ATT under arranging).In this case, it is constant that DU gives the digital power of coming, and forward link simulation ATT increases N dB, and power output reduces N-/+0.5dB, and the corresponding adjustment of feedback analog ATT can be alignd forward direction input in DPD loop with the digital power of feed back input.Preferably, feed back ATT precision here and need to calibrate setting, also need to do temperature-compensating setting.
Based on this, in the technical scheme that the embodiment of the present invention two proposes here, in implementation procedure, also consider when single carrier signal is carried out static power adjustment and/or whole signal transmission passage is carried out to static power adjustment, adjust result and also can impact power stage value corresponding to signal transmission passage.Particularly, signal transmission passage is carried out to static power adjust instruction receiving, according to described forward power value, described feedback power value and static power adjusted value, determine respectively the corresponding power stage value of each carrier signal.And then the output power value of definite this signal transmission.For example, according to the formula 3 proposing in above-described embodiment one, following formula has specifically provided 8 carrier signals transmitting respectively in two signalling channels of AB, and power stage value corresponding to each carrier signal is:
For transmitting carrier signal 0 ~ 4 in signal transmission passage A, power stage value corresponding to each carrier signal is:
TSSIA_0(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))-attA_0-staticAttF_A
TSSIA_1(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))-attA_1-staticAttF_A
TSSIA_2(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))-attA_2-staticAttF_A
TSSIA_3(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))-attA_3-staticAttF_A
TSSIB_0(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_B-cfrDB)+(gainF-(fSigPwDB-feedPwDB))-attB_0-staticAttF_B
TSSIB_1(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_B-cfrDB)+(gainF-(fSigPwDB-feedPwDB))-attB_1-staticAttF_B
TSSIB_2(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_B-cfrDB)+(gainF-(fSigPwDB-feedPwDB))-attB_2-staticAttF_B
TSSIB_3(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_B-cfrDB)+(gainF-(fSigPwDB-feedPwDB))-attB_3-staticAttF_B
The numerical value of the I2+Q2 in the corresponding table 2 of IQ Data wherein, wherein, definite method of I2+Q2 elaborates in above-mentioned steps, repeats no more here.The digital power that this value sends for DU is by FPGA statistical report.Kdl_value also can find in table 2, the Kdownlink in corresponding table 2, and gainF is the loop gain that DPD reports, i.e. difference between forward power value and feedback power value, reporting of this value comprised temperature-compensating.
The default attA_0-attB_3 of the initial value of fSigPwDB and feedPwDB forward power value and feedback power value is according to different systems or identical standard or imbalance power requirement, " with GSM gain inequality " row in corresponding table 2, this value is sent instruction adjustment by DU.
When the corresponding static power of staticAttF_A/B is adjusted, the value that analogATT need to decay, the static power adjusted value signal transmission passage A or B being issued, this value is sent instruction adjustment by DU.
Baseband gain adjusted value behind the corresponding DPDQian He of cfrF_A/B road, cfrDB correspondence is the baseband gain adjusted value behind DPDQian He road in calibration.
According to the above results, the power stage value of respective signal transmission channel A is: ouputPowerA (dBm)=10lg (10^ (TSSIA_0/10)+10^ (TSSIA_1/10)+10^ (TSSIA_2/10)+10^ (TSSIA_3/10))
The power stage value of respective signal transmission channel B is:
outputPowerB(dBm)=10lg(10^(TSSB_0/10)+10^(TSSIB_1/10)+10^(TSSIB_2/10)+10^(TSSIB_3/10))
Step 66, the power stage value that each signal transmission passage of determining is corresponding reports upper application software, according to the power stage value of each signal transmission passage of correspondence obtaining, corresponding signal transmission passage is carried out to power adjustment.
Wherein, power stage value corresponding to each signal transmission passage calculating reported, need to be done as follows, it should be noted that, the embodiment of the present invention two has only provided a kind of preferably embodiment here, in specific implementation process, is not limited to those set-up modes.
The first step: calibration process, specifically comprises:
Wherein ATC sends AGC scaling instruction to DSP, and after receiving the calibration success response message that DSP sends, calibration process finishes.
Particularly, comprise that ATS sends AGC scaling instruction; DSP switching signal transmission channel; DSP gathers corresponding downlink data feedback; DSP feeds back DDC, zero-suppresses frequently, through feedback equalization filter factor EQ_C filtering, time delay alignment; DSP chooses amplitude range in the above amplitude data power statistics of peak-peak 1/5 according to downlink data; P_FW_S (DB); P_FB_S (DB); DSP replys the success of AGC scaling instruction.
Second step: AGC sends to DSP by calibration data.
Wherein, calibration data can be, but not limited to comprise calibration temperature T_S; Calibration forward power P_FW_S (db); Calibration feedback power P_FB_S (db); Feedback equalization filter factor EQ_C[60];
Descending ATT value: ATT_FW_S during calibration;
Digital gain controller value after DPD during calibration, FW_digital_Gain_S;
During calibration, feed back ATT value, ATT_FB_S;
Feedback ATT value accuracy table ATT_FB_CAL[];
Descending ATT value accuracy table ATT_FW_CAL[];
Feedback link Temperature compensation for gain table FB_CAL_T[];
Descending static power change value: (relative calibration state) ATT_FW_DELTA:d
Current feedback link temperature: T
Feedback ATT value, ATT_FB;
The 3rd step: (completing at pattern handoff procedure) controlled in the initialization of operational mode Xia DuiAGCLian road, mainly comprises:
Upper layer software (applications) issues from the free time and is switched to operational mode, and DSP completes to switch and replys (AGC acquiescence is closed);
Upper layer software (applications) issues from AGC and opens;
DSP arranges descending ATT:ATT_FW=ATT_FW_S-ATT_FW_DELTA;
DSP arranges digital gain controller value after DPD:
FW_digital_Gain=FW_digital_Gain_S-(ATT_FW_CAL[ATT_FW]-ATT_FW_CAL[ATT_FW_S])；
DSP replys ATS AGC and opens successfully;
The 4th step: the process of operation AGC, can be, but not limited to comprise following content:
1. trigger sampling downstream feedback data;
2. feed back DDC, the audio data of zero-suppressing, through feedback equalization filter factor EQ_C filtering, time delay alignment;
3. according to downlink data, choose amplitude range in the above amplitude data power statistics of peak-peak 1/5;
A:P_FW(DB)
B:P_FB(DB)
C:If(P_FW-P_FW_S<-20dB) printf(“TOO Small Power‘);return0；
4. computational process
A:GAIN=P_FB-P_FW;
B:GAIN_DELTA=GAIN-(P_FB_S-P_FW_S)；
C:VAR1=（FB_CAL_T[T_S]-FB_CAL_T[T]）;
D:VAR2＝ATT_FB_CAL[ATT_FB]-ATT_FW_CAL[ATT_FB_S]
E:VAR3=ATT_FW_DELTA;
F:GAIN_DELTA_CAL=GAIN_DELTA+VAR1+VAR2+VAR3;
G:FW_digital_Gain_NOW＝FW_digital_Gain_pre+GAIN_DELTA_CAL
5. setting up procedure
If(abs(FW_digital_Gain_NOW)>3dB)
Printf (" digital gain is adjusted excessive "); Return0;
else
FW_digital_Gain=FW_digital_Gain_NOW is set;
6.DSP reports gain G AIN_DELTA_CAL: with the difference of desired value.
Upper layer software (applications), after receiving the power stage value that signal transmission passage is corresponding, according to the actual requirements, carries out power control to RRU system.
The technical scheme that adopts the embodiment of the present invention to propose here, can realize under the condition existing at multimode communication signal preferably, determines accurately the power stage value that each signal transmission passage is corresponding, thereby improves the precision that power is controlled.Can also meet the application that static power adjustment and base station input digital power are adjusted simultaneously.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (26)
1. a Poewr control method, is characterized in that, comprising:
For a signal transmission passage, to the adjustment that gains respectively of the carrier signal of at least two kinds of standards transmitting in described signal transmission passage, and the carrier signal gaining after adjusting is closed to road and process to obtain and close road signal;
Described in determining, close forward power value and the feedback power value that road signal is corresponding;
According to described forward power value and the described feedback power value determined, determine the power stage value that this signal transmission passage is corresponding;
According to the power stage value obtaining, this signal transmission passage is carried out to power control.
2. the method for claim 1, is characterized in that, described in determining, closes the feedback power value that road signal is corresponding, comprising:
Described in inciting somebody to action, close road signal and be coupled in feedback link after gain is adjusted, will in feedback link, transmit He road signal carries out equilibrium treatment, obtains equilibrium treatment signal, determines feedback power value corresponding to described equilibrium treatment signal.
3. method as claimed in claim 2, is characterized in that, the described He road signal that will transmit in feedback link carries out equilibrium treatment, obtains equilibrium treatment signal, comprising:
Based on frequency domain equalization mode, by transmitting the frequency response fluctuation of He road signal in wide-band in feedback link, reduce, obtain equilibrium treatment signal.
4. the method for claim 1, is characterized in that, to the adjustment that gains respectively of the carrier signal of at least two kinds of standards transmitting in described signal transmission passage, comprising:
Determine respectively the gain difference corresponding with each carrier signal;
For a carrier signal, according to determine to gain difference that should carrier signal to the adjustment that gains of this carrier signal.
5. method as claimed in claim 4, is characterized in that, determines respectively and comprises the gain difference corresponding with each carrier signal:
For a carrier signal, at least one that adjust in difference and pilot frequency point gain difference by different standard gain difference corresponding to this carrier signal, sub-carrier static power determined the gain difference that this carrier signal is corresponding, wherein said different standard gain difference is to determine according to standard corresponding to each carrier signal of transmitting in signal transmission passage, and described pilot frequency point gain difference is to determine according to frequency corresponding to each carrier signal of transmitting in signal transmission passage.
6. method as claimed in claim 5, is characterized in that, by the different standard gain difference that this carrier signal is corresponding, determines the gain difference that this carrier signal is corresponding, comprising:
Determine respectively default gain adjustment value corresponding to each carrier signal of transmitting in described signal transmission passage, and choose default gain adjustment value corresponding to a kind of carrier signal of standard as calibration value; Determine between the scaled values default gain adjustment value corresponding with this carrier signal and ask difference, obtain different standard gain difference corresponding to this carrier signal, using the different standard gain difference obtaining as the gain difference corresponding with this carrier signal;
By sub-carrier static power corresponding to this carrier signal, adjust difference and determine the gain difference that this carrier signal is corresponding, comprising:
If receive, this carrier wave is carried out to sub-carrier static power and adjust instruction, determine sub-carrier static power adjustment difference corresponding to this carrier wave comprising in sub-carrier static power adjustment instruction, described static power is adjusted to difference as the gain difference corresponding with this carrier signal;
By the pilot frequency point gain difference that this carrier signal is corresponding, determine the gain difference corresponding with this carrier signal, comprising:
If receive, this carrier signal is carried out to frequency hopping power control instruction, determine the pilot frequency point gain difference that this carrier signal is corresponding, using described pilot frequency point gain difference as the gain difference corresponding with this carrier signal.
7. method as claimed in claim 5, is characterized in that, described definite gain difference corresponding with each carrier signal respectively, comprising:
Described different standard gain difference is deducted to sub-carrier static power and adjust difference, then be added with pilot frequency point gain difference the gain difference corresponding with this carrier signal with value conduct obtaining.
8. the method as described in as arbitrary in claim 4 ~ 7, is characterized in that, according to determine to gain difference that should carrier signal, adopt following formula to the adjustment that gains of each carrier signal:
G(carrier)＝Gd×10
(E/20)；
Wherein, G (carrier) is the numerical value that each carrier signal gains after adjusting, and Gd is that scaled values is adjusted in the gain of presetting, and E is the gain difference of determining.
9. the method for claim 1, is characterized in that, described forward power value and described feedback power value that described basis is determined, determine the power stage value that this signal transmission passage is corresponding, comprising:
According to described forward power value and described feedback power value, determine respectively the corresponding power stage value of each carrier signal;
The corresponding power stage value of whole carrier signals of determining is added to summation, obtains the power stage value that signal transmission passage is corresponding.
10. method as claimed in claim 9, is characterized in that, adopts following formula, according to described forward power value and described feedback power value, determines respectively the corresponding power stage value of each carrier signal:
TSSI N_I(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))–attN_I;
Wherein, TSSI N_I is the power stage value of I carrier wave in N signal transmission passage, IQ Data is the base band power mean value of presetting this carrier wave counting in duration, Kdl_value is to default gain adjustment value that should carrier wave, cfrF_A-cfrDB is to gain adjustment value that should signal transmission passage, gainF is the difference of forward power value and feedback power value, fSigPwDB – feedPwDB is default forward power value and the difference of feedback power value, and attN_I is the default automatic pad value of I carrier wave in N signal transmission passage.
11. the method for claim 1, is characterized in that, according to described forward power value and the described feedback power value determined, determine the power stage value that this signal transmission passage is corresponding, comprising:
If receive, signal transmission passage is carried out to static power and adjust instruction, according to described forward power value, described feedback power value and static power adjusted value, determine respectively the corresponding power stage value of each carrier signal;
The corresponding power stage value of whole carrier signals of determining is added to summation, obtains the power stage value that signal transmission passage is corresponding.
12. methods as claimed in claim 11, is characterized in that, described static power adjusted value is predefined or determines according to predefined static power adjusted value and adjustment step value.
13. methods as described in claim 11 or 12, is characterized in that, also comprise and adopt following formula, determine the corresponding power stage value of each carrier signal:
TSSI N_I(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))–attN_I-staticAttF_N
Wherein, TSSI N_I is the power stage value of I carrier wave in N signal transmission passage, IQData is the base band power mean value of presetting this carrier wave counting in duration, Kdl_value is to default gain adjustment value that should carrier wave, cfrF_A-cfrDB is to gain adjustment value that should signal transmission passage, gainF is the difference of forward power value and feedback power value, fSigPwDB – feedPwDB is default forward power value and the difference of feedback power value, attN_I is the default automatic pad value of I carrier wave in N signal transmission passage, staticAttF_N is the static power adjusted value that this signal transmission passage is corresponding.
14. 1 kinds of output control devices, is characterized in that, comprising:
Close signal acquisition unit, road, be used for for a signal transmission passage, to the adjustment that gains respectively of the carrier signal of at least two kinds of standards transmitting in described signal transmission passage, and the carrier signal gaining after adjusting is closed to road and process to obtain and close road signal;
Determining unit, for obtaining He road signal and close forward power value and the feedback power value that road signal is corresponding described in determining according to closing signal acquisition unit, road;
Power stage value obtains unit, for described forward power value and the described feedback power value of determining according to determining unit, determines the power stage value that this signal transmission passage is corresponding, according to the power stage value obtaining, this signal transmission passage is carried out to power control.
15. devices as claimed in claim 14, it is characterized in that, described determining unit, specifically for closing road signal described in general, after adjusting, gain is coupled in feedback link, to in feedback link, transmit He road signal and carry out equilibrium treatment, obtain equilibrium treatment signal, determine feedback power value corresponding to described equilibrium treatment signal.
16. devices as claimed in claim 15, is characterized in that, described determining unit, specifically for based on frequency domain equalization mode, reduces transmitting the frequency response fluctuation of He road signal in wide-band in feedback link, obtains equilibrium treatment signal.
17. devices as claimed in claim 14, is characterized in that, described in close signal acquisition unit, road, specifically for determining respectively the gain difference corresponding with each carrier signal; For a carrier signal, according to determine to gain difference that should carrier signal to the adjustment that gains of this carrier signal.
18. devices as claimed in claim 17, it is characterized in that, the described signal acquisition unit, road that closes, specifically for for a carrier signal, by different standard gain difference corresponding to this carrier signal, at least one in sub-carrier static power adjustment difference and pilot frequency point gain difference determined the gain difference that this carrier signal is corresponding, wherein said different standard gain difference is to determine according to standard corresponding to each carrier signal of transmitting in signal transmission passage, described pilot frequency point gain difference is to determine according to frequency corresponding to each carrier signal of transmitting in signal transmission passage.
19. devices as claimed in claim 18, it is characterized in that, the described signal acquisition unit, road that closes, specifically for determining respectively default gain adjustment value corresponding to each carrier signal of transmitting in described signal transmission passage, and choose default gain adjustment value corresponding to a kind of carrier signal of standard as calibration value; Determine between the default gain adjustment value that calibration value is corresponding with this carrier signal and ask difference, obtain different standard gain difference corresponding to this carrier signal, using the different standard gain difference obtaining as the gain difference corresponding with this carrier signal; And if receive and this carrier wave is carried out to sub-carrier static power adjust instruction, determine sub-carrier static power adjustment difference corresponding to this carrier wave comprising in sub-carrier static power adjustment instruction, described static power is adjusted to difference as the gain difference corresponding with this carrier signal; And if receive this carrier signal carried out to frequency hopping power control instruction, determine the pilot frequency point gain difference that this carrier signal is corresponding, using described pilot frequency point gain difference as the gain difference corresponding with this carrier signal.
20. devices as claimed in claim 18, it is characterized in that, the described signal acquisition unit, road that closes, adjusts difference specifically for described different standard gain difference being deducted to sub-carrier static power, then is added with pilot frequency point gain difference the gain difference corresponding with this carrier signal with value conduct obtaining.
21. devices as described in as arbitrary in claim 17 ~ 20, is characterized in that, described in close signal acquisition unit, road, specifically for adopting following formula to the adjustment that gains of each carrier signal:
G(carrier)＝Gd×10
(E/20)；
Wherein, G (carrier) is the numerical value that each carrier signal gains after adjusting, and Gd is that scaled values is adjusted in the gain of presetting, and E is the gain difference of determining.
22. devices as claimed in claim 14, is characterized in that, described power stage value obtains unit specifically for according to described forward power value and described feedback power value, determines respectively the corresponding power stage value of each carrier signal; The corresponding power stage value of whole carrier signals of determining is added to summation, obtains the power stage value that signal transmission passage is corresponding.
23. devices as claimed in claim 22, is characterized in that, described power stage value obtains unit, specifically adopts following formula, according to described forward power value and described feedback power value, determine respectively the corresponding power stage value of each carrier signal:
TSSI N_I(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))–attN_I;
Wherein, TSSI N_I is the power stage value of I carrier wave in N signal transmission passage, IQ Data is the base band power mean value of presetting this carrier wave counting in duration, Kdl_value is to default gain adjustment value that should carrier wave, cfrF_A-cfrDB is to gain adjustment value that should signal transmission passage, gainF is the difference of forward power value and feedback power value, fSigPwDB – feedPwDB is default forward power value and the difference of feedback power value, and attN_I is the default automatic pad value of I carrier wave in N signal transmission passage.
24. devices as claimed in claim 14, it is characterized in that, if obtaining unit, described power stage value, specifically for receiving, signal transmission passage is carried out to static power adjustment instruction, according to described forward power value, described feedback power value and static power adjusted value, determine respectively the corresponding power stage value of each carrier signal; The corresponding power stage value of whole carrier signals of determining is added to summation, obtains the power stage value that signal transmission passage is corresponding.
25. devices as claimed in claim 24, is characterized in that, described static power adjusted value is predefined or determines according to predefined static power adjusted value and adjustment step value.
26. devices as described in claim 24 or 25, is characterized in that, described power stage value obtains unit also for by following formula, determines the corresponding power stage value of each carrier signal:
TSSI N_I(dBm)=10*log(IQ Data)+Kdl_value+(cfrF_A-cfrDB)+(gainF-(fSigPwDB-feedPwDB))–attN_I-staticAttF_N
Wherein, TSSI N_I is the power stage value of I carrier wave in N signal transmission passage, IQData is the base band power mean value of presetting this carrier wave counting in duration, Kdl_value is to default gain adjustment value that should carrier wave, cfrF_A-cfrDB is to gain adjustment value that should signal transmission passage, gainF is the difference of forward power value and feedback power value, fSigPwDB – feedPwDB is default forward power value and the difference of feedback power value, attN_I is the default automatic pad value of I carrier wave in N signal transmission passage, staticAttF_N is the static power adjusted value that this signal transmission passage is corresponding.
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| CN104796976A (en) * | 2014-01-17 | 2015-07-22 | 北京信威通信技术股份有限公司 | Terminal receiving gain self-adaptive adjustment method |
| CN105611619A (en) * | 2016-01-11 | 2016-05-25 | 中国电子科技集团公司第十研究所 | Multi-carrier power self-adaptive control circuit module |
| CN106102152A (en) * | 2016-05-31 | 2016-11-09 | 武汉虹信通信技术有限责任公司 | A kind of multi-standard digital power Balance route output intent and control device thereof |
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| CN111212436A (en) * | 2019-12-23 | 2020-05-29 | 京信通信系统（中国）有限公司 | Gain calibration method, device, computer equipment and storage medium |
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| CN111818301A (en) * | 2020-06-18 | 2020-10-23 | 珠海云海创远科技有限公司 | Power regulation method, system and feedback device for COFDM (coded orthogonal frequency division multiplexing) image transmission system |
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| CN105611619A (en) * | 2016-01-11 | 2016-05-25 | 中国电子科技集团公司第十研究所 | Multi-carrier power self-adaptive control circuit module |
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| CN109769293B (en) * | 2018-12-29 | 2021-06-22 | 京信通信系统（中国）有限公司 | RRU calibration method, device, computer equipment and storage medium |
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| CN111212436B (en) * | 2019-12-23 | 2023-08-25 | 京信网络系统股份有限公司 | Gain calibration method, device, computer equipment and storage medium |
| CN111818301A (en) * | 2020-06-18 | 2020-10-23 | 珠海云海创远科技有限公司 | Power regulation method, system and feedback device for COFDM (coded orthogonal frequency division multiplexing) image transmission system |
| CN111818301B (en) * | 2020-06-18 | 2022-02-01 | 珠海云海创远科技有限公司 | Power regulation method, system and feedback device for COFDM (coded orthogonal frequency division multiplexing) image transmission system |
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