CN101316125A - Emission power regulation method and system - Google Patents
Emission power regulation method and system Download PDFInfo
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- CN101316125A CN101316125A CNA2007101093959A CN200710109395A CN101316125A CN 101316125 A CN101316125 A CN 101316125A CN A2007101093959 A CNA2007101093959 A CN A2007101093959A CN 200710109395 A CN200710109395 A CN 200710109395A CN 101316125 A CN101316125 A CN 101316125A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/246—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter calculated in said terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
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Abstract
The invention relates to a method for adjusting the emission power, which includes the following steps of getting the channel gain value of each time-frequency section according to the down pilot signal received at the terminal, and making adjustment on the original emission power of each time-frequency section signal according to the channel gain value before the up emission is made, and so the actual signal emission power of each time-frequency section can be obtained. The invention also relates to an emission power adjustment system, which includes a channel gain capture module and an emission power adjustment module. The embodiment of the invention utilizes the symmetry of the up and down channels of the TDD system to adjust the original emission power of each sub-carrier signal according to the channel gain value obtained by the down pilot signal, which reduces the destruction on the orthogonality of the up control channel caused by the time-varying channel and improves the non-coherent detection performance of the up channel.
Description
Technical field
The present invention relates to the carrier communication field, especially a kind of transmit power controlling method and system thereof that is applicable to time division duplex (Time DivisionDuplex is called for short TDD) system.
Background technology
OFDM (Orthogonal Frequency Division Multiplexing, be called for short OFDM) be a kind of multi-carrier transmission technology, frequency spectrum can be divided into many subcarriers, each subcarrier adopts and modulates than low rate, because this technology has good anti-multipath time delay ability, thereby is used widely in cellular mobile system.By distributing different subcarriers, can realize that the multiple access of OFDM inserts, i.e. OFDMA to different users.Each narrow-band sub-carriers adopts different modulation systems, and for example 16QAM, 64QAM or the like adopt contrary fast fourier transform (Inverse Fast Fourier Transforms is called for short IFFT) that OFDM is provided modulation then.Need the data of transmission to be mapped on the symbol of OFDM,, add Cyclic Prefix, send through behind the IFFT.Receiving terminal utilizes fast Fourier transform (FastFourier Transforms is called for short FFT) to solve the OFDM symbol, takes out the data that are mapped to this symbol.
In the OFDMA system, the resource different to the different user assignment (time, space, frequency resource) realizes different user to the sharing of resource, and simultaneity factor must indicate its data of each terminal to transmit on which resource.When number of users increases, the expense that is used to transmit resource assignment information will increase.For reverse control channel, the signaling that each channel transmits is shorter, and the assignable number of resources of system is limited, and the data between the different user different channels can't improve transmission performance by coding simultaneously.
The Walsh sign indicating number is a kind of orthogonal intersection, is generally used for using as spreading code in the spread spectrum system.The Walsh sign indicating number can be eliminated or suppress multiple access and disturb (Multiple Access Interferences is called for short MAI).Simultaneously, the Walsh sign indicating number also can be used for the transmission of information sequence, for example, it is the 1024Walsh sign indicating number that 10 bit information series can be mapped to length, do relevant with 1024 Walsh sign indicating numbers with the information series that receives at receiving terminal, because the orthogonality of Walsh sign indicating number can recover information series by detecting maximum relevant peaks, this mode is an incoherent detection.After the information sequence that belongs to the different user different channels is mapped to the Walsh sign indicating number, adds different scramblers and realize that different user is without channel multiplexing to identical physical resources.The channel that this moment, the different channels different user sent can be regarded as to disturb and handles, under the condition that guarantees the control channel performance, in fixed resource (or variable resource, but terminal can be known its position according to its Changing Pattern) upload carry information and need not resource assignment information, reduced the expense of control information.
In the UMB1.0 standard, in order to improve the communication quality of system, a kind of scheme of similar spread spectrum has been proposed in the ofdm system reverse control channel, in ofdm system, utilize the characteristic of Walsh sign indicating number to come communicating control information.Except access sequence, the frame length that transmits in each control channel is generally less than and equals 10 bits (corresponding 1024 sequences), for reducing simultaneously as far as possible, the resource that makes full use of the Walsh sign indicating number disturbs, 1024 sequences are divided into several subclass, except access channel, each control channel takies a subclass.At first carry out HADAMARD mapping (promptly from 1024 * 1024 HADAMARD orthogonal matrix, selecting wherein delegation or row), obtain the Walsh sign indicating number of one 1024 bit long, again this Walsh sign indicating number is carried out scrambling.Access channel is also done similar processing.WALSH sign indicating number after the different ascending control channel scramblings is carried out addition merge, 1024 bits after the merging are with interweaving again, and with another scrambler scrambling to distinguish different cellular cells or sector.1024 bits of output are divided into 8 sub-pieces, every contains 128 bits, each piece is carried out 128 complex values of FFT (FAST FOURIER TRANSFORMATION) output of 128, and 1024 complex values that obtain at last are carried on continuous in the ofdm system 128 subcarriers and 8 symbols.Like this, a reverse controll block has taken the bandwidth of 1.25MHz and the length of a physical frame.This system superposes the different channels different user data on identical physical resource, need not resource assignment information satisfying under the situation of systematic function.
In this scheme, receiving algorithm is an incoherent reception.Adopting mode of frequency division duplexing (FrequencyDivision Duplexing, be called for short FDD) time, owing to there is not the channel information of up channel, so when terminal sends, be implied with such hypothesis, the channel that is the controll block at whole reverse control channel place is a coherent channel, in brief, the channel gain of each time-frequency piece is all the same on the controll block channel.Therefore, the transmitting power on each time-frequency piece also is on all four emission the time.
But in fact at receiving terminal, the channel gain of The whole control section is not to be a unified value, and is always variant between each time-frequency piece, especially at fast fading channel, so this hypothesis is more rough.Therefore when sending control information, go to send, then can't guarantee the orthogonality between the different Walsh sign indicating numbers according to this hypothesis.Because in synchro system, only under the situation that channel is consistent fully, the orthogonality of Walsh sign indicating number can be guaranteed fully that just if channel changes, orthogonality is just destroyed so, has just increased error probability, thereby causes the waste of information.
Summary of the invention
The defective of the poor-performing of incoherent detection when the purpose of the embodiment of the invention is aimed at and sends control information with fdd mode, a kind of transmission power adjustment method and system have been proposed, can adjust up transmitting power according to the characteristics of up-downgoing channel symmetry under the tdd mode, obtain good incoherent detection performance.
For achieving the above object, embodiments of the invention provide a kind of transmission power adjustment method, may further comprise the steps:
The down-bound pilot frequency signal that receives according to terminal obtains the channel yield value of each time-frequency piece, and before carrying out up emission, according to described channel yield value the original transmitted power of described each time-frequency block signal is adjusted, obtain the actual emission power of described each time-frequency block signal.
To achieve these goals, embodiments of the invention also provide a kind of transmitting power Adjustment System, comprising:
Channel gain obtains module, is used for obtaining according to down-bound pilot frequency signal the channel yield value of each time-frequency piece;
The transmitting power adjusting module obtains module with described channel gain and links to each other, and is used for according to described channel yield value the original transmitted power of described each time-frequency block signal being adjusted, and obtains the actual emission power of described each time-frequency block signal.
Based on technique scheme, embodiments of the invention utilize the symmetry of TDD system up-downgoing channel, obtain channel yield value according to down-bound pilot frequency signal, and the original transmitted power of each time-frequency block signal adjusted, reduced the destruction of time varying channel, improved the incoherent detection performance of up channel the ascending control channel orthogonality.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is the schematic flow sheet of first embodiment of transmission power adjustment method of the present invention.
Fig. 2 is the schematic flow sheet of second embodiment of transmission power adjustment method of the present invention.
Fig. 3 is the schematic flow sheet of the 3rd embodiment of transmission power adjustment method of the present invention.
Fig. 4 is the structural representation of first embodiment of transmitting power Adjustment System of the present invention.
Fig. 5 is the structural representation of second embodiment of transmitting power Adjustment System of the present invention.
Fig. 6 is the structural representation of the 3rd embodiment of transmitting power Adjustment System of the present invention.
Fig. 7 is the structural representation of the 4th embodiment of transmitting power Adjustment System of the present invention.
Embodiment
The embodiment of the invention utilizes the symmetry of up-downgoing channel under the tdd mode to obtain channel gain before carrying out the signal emission, and then adjusts transmitting power, thereby realizes the raising of the incoherent detection performance of up channel.
As shown in Figure 1, be the schematic flow sheet of first embodiment of transmission power adjustment method of the present invention.Present embodiment may further comprise the steps:
Present embodiment is applicable to the mobile communication system that adopts tdd mode, receives and be transmitted in the different time-gap of same frequency channels (being carrier wave) under this pattern, separates receiving and transfer channel with the time of assurance, therefore can make full use of wireless frequency spectrum.Owing to adopt same frequency channels, therefore when descending reception, just can estimate channel gain.Utilize channel gain that original transmitted power is adjusted, obtain adjusted actual emission power and carry out the signal emission again, thereby improve the transmission performance of ascending control channel.
The method that obtains channel yield value has a lot, such as since pilot signal Pilot be known, so can adopt the signal Received that receives to remove in pilot signal, to obtain the channel gain of pilot positions, be H=Received/Pilot, utilize interpolation to obtain (comprising linear interpolation or non-linear interpolation) channel gain of each time frequency signal piece in adjacent time domain or frequency domain then.
Here use H
IjExpression channel gain, i represent the to transmit sequence number of subcarrier of shared Resource Block, j represent the to transmit sequence number of symbol of shared Resource Block, i=1,2 ..., 8; J=1,2 ..., 128, comprised amplitude and phase place in the channel gain of present embodiment, the original transmitted power S of each time-frequency block signal
IjS is adopted in expression here
IjSignal be the signal after the scrambling of interweaving, it can be the signal in the Random Access Channel, or reverse control channels such as the CQI channel in ack channel, the CDMA controll block, BFCH channel, VCQI channel, MCQI channel, SFCH channel, also can be other any channels that adopt incoherent detection.
Carrying out power when adjusting, can obtain the actual emission power T of each new time-frequency block signal with the original transmitted power of each time-frequency block signal divided by channel gain
Ij, promptly following formula:
T
ij＝S
ij/H
ij，i＝1，2，...，8；j＝1，2，...，128
If when adjusted signal power surpasses the maximum magnitude of power amplifier or some threshold values on some time-frequency pieces, can directly get this maximum or threshold value, as follows:
The sign () here is a sign function.Difference according to channel, the span of subscript i, j is also different, the reverse ACK controll block of each 2*8 is after selected DFT sequence and scrambling in for example reverse ack channel, but when adopting said method to adjust, the value of subscript i and j is different with above-mentioned example, wherein i=1 or 2, j=1,2 ..., 8.
S in the present embodiment
IjAmplitude be certain, and phase change is also less, and the variation of the phase place of H and amplitude is bigger, therefore in order to simplify the kind that transmits, also can be to H
IjQuantize,, be respectively pi/4 such as phase mass being changed into 4 grades, 3pi/4,5pi/4 and 7pi/4 become several grades to amplitude quantizing, or the like.This mode also can partly alleviate the influence that the channel time variation of downstream-to-upstream brings.
Adjusting processing in the present embodiment is directly divided by channel yield value, though this mode is more clear in theory, in actual applications because the time variation of channel yield value requires meeting than higher to hardware configuration with transmitting power.Therefore in order to reduce the requirement to hardware, can quantize channel yield value, be 4 grades with phase quantization for example, is respectively
With
Amplitude also is quantified as several grades,, just can realizes the division of the channel yield value of these several predetermined phase places by existing phase delay device.This quantification manner has been taken into account the time variation and the hardware of channel yield value simultaneously and has been realized cost.
Before divided by described channel gain, also comprise the step that described channel gain is quantified as the numerical value of preset phase and/or amplitude.
As shown in Figure 2, schematic flow sheet for second embodiment of transmission power adjustment method of the present invention, from last embodiment as can be seen, adjusted total transmitting power has certain may surpassing to adjust preceding transmitting power, consistency for power before and after keeping, and do not influence whole power control, therefore can also carry out the normalization adjustment according to the total transmitting power before and after adjusting.
Different with a last embodiment is, present embodiment is behind the actual emission power that obtains each time-frequency block signal, also comprise step 103, promptly original transmitted power and the actual emission power according to each time-frequency block signal calculates the total original transmitted power of acquisition and total actual emission power respectively, and judge that whether total actual emission power is greater than total original transmitted power, be execution in step 104 then, otherwise adopt the actual emission power that obtains to carry out the signal emission; In step 104, the actual emission power of each time-frequency piece is carried out the normalization operation.
Total original transmitted power ∑ | T
Ij|
2Expression, total actual emission power ∑ | S
Ij|
2Represent, if total transmitting power diminishes then does not need to carry out normalized, if need adjustment coefficient δ=∑ is multiply by in the actual emission power unification of each time-frequency piece but total transmitting power becomes big | T
Ij|
2/ ∑ | S
Ij|
2, because total actual emission power is bigger, so δ＜1.
Adopt this normalization operation, can limit the execution number of times, to obtain the equilibrium of performance and complexity.Also can further limit,, otherwise carry out the normalization operation if the ratio of promptly total actual emission power and total original transmitted power less than predetermined threshold value, then can directly adopt described actual emission power to carry out the signal emission to normalizing condition.For example total actual emission power increases with respect to total original transmitted power does not just need to carry out normalization below 5%, and surpass 5% and then carry out normalization, thus the consistency of total transmitting power before and after guaranteeing to adjust.
Usually the channel of emission this moment more or less some variation of channel when before having done down channel and estimate, if terminal finds that when carrying out channel estimating channel variation is very fast, for example the time variation of terminal channel in high-speed motion is very strong, do not satisfied the channel coherent condition in the same frame, carried out preequalization again this moment so and lost meaning.Therefore need judge the channel coherent condition.As shown in Figure 3, schematic flow sheet for the 3rd embodiment of transmission power adjustment method of the present invention, compare with first embodiment, present embodiment has also increased step 100 before the original transmitted power of each time-frequency block signal is adjusted, come whether the channel that signal is launched is satisfied coherent condition and judge, if satisfy coherent condition, then carry out the adjustment operation among first embodiment,, then can directly launch in existing mode if do not satisfy.
Whether satisfy coherent condition for channel how to judge signal emission, can select according to terminal capability, if terminal is supported speed measuring function, the speed that then can the judge terminal threshold value that whether outpaces if surpass, then determines not satisfy coherent condition.If terminal is not supported to test the speed, can judge then whether the amplitude of variation of the channel yield value of each time-frequency block signal surpasses amplitude threshold, when promptly the maximum of channel gain and the multiple difference between the minimum value are greater than amplitude threshold, then determine not satisfy coherent condition; Judge that perhaps whether the real part of channel yield value of each time-frequency block signal or the symbol continually varying number of times of imaginary part surpass frequency threshold value, if surpass, then determine not satisfy coherent condition.
Step 100 in the present embodiment also can be applied among above-mentioned second embodiment.
As shown in Figure 4, structural representation for first embodiment of transmitting power Adjustment System of the present invention, comprise that channel gain obtains module 1 and transmitting power adjusting module 2, channel gain obtains the channel yield value that module 1 can obtain each time-frequency piece according to down-bound pilot frequency signal; Transmitting power adjusting module 2 obtains module 1 with channel gain and links to each other, and is used for according to described channel yield value the original transmitted power of described each time-frequency block signal being adjusted, and obtains the actual emission power of described each time-frequency block signal.
As shown in Figure 5, structural representation for second embodiment of transmitting power Adjustment System of the present invention, further comprise computing module 21 at transmitting power adjusting module 2, obtaining module 1 with channel gain links to each other, can obtain the actual emission power of each new time-frequency block signal with the original transmitted power of each time-frequency block signal divided by described channel gain.Can also increase in this embodiment and be used for each time-frequency block signal is judged all whether actual emission power meets preset range, if the actual emission power of time-frequency block signal not in preset range, then is provided with the module of predetermined transmission power level as the actual emission power of this time-frequency block signal.
As shown in Figure 6, structural representation for the 3rd embodiment of transmitting power Adjustment System of the present invention, compare with a last embodiment, the transmitting power adjusting module in the present embodiment also comprises: total original power computing module 22, total actual emission power module 23 and normalization module 24.Wherein total original power computing module 22 links to each other with computing module 21, is used for according to the total original transmitted power of the original transmitted power calculation of each time-frequency block signal.Total actual emission power module 23 links to each other with computing module 21, is used for calculating total actual emission power according to the actual emission power of each time-frequency block signal.Normalization module 24, link to each other with total actual emission power module 23 with total original power computing module 22, can be behind the actual emission power that obtains each time-frequency block signal, if total actual emission power is greater than total original transmitted power, the actual emission power of each time-frequency piece is carried out the normalization operation.
As shown in Figure 7, structural representation for the 4th embodiment of transmitting power Adjustment System of the present invention, first embodiment compares, present embodiment also includes coherent condition judge module 3, obtaining module 1 with channel gain links to each other with transmitting power adjusting module 2, being used to judge whether the channel of signal emission satisfies coherent condition, is then to carry out to adjust operation, otherwise directly adopts original transmitted power to carry out the signal emission.
The embodiment of the method and system of adjusting by above-mentioned transmitting power, the present invention utilizes the symmetry of TDD system up-downgoing channel, obtain channel yield value according to down-bound pilot frequency signal, and the original transmitted power of each sub-carrier signal adjusted, reduced the destruction of time varying channel, improved the incoherent detection performance of up channel the ascending control channel orthogonality.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit; Although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or the part technical characterictic is equal to replacement the specific embodiment of the present invention; And not breaking away from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (17)
1, a kind of transmission power adjustment method is characterized in that, may further comprise the steps:
The down-bound pilot frequency signal that receives according to terminal obtains the channel yield value of each time-frequency piece, and before carrying out up emission, according to described channel yield value the original transmitted power of described each time-frequency block signal is adjusted, obtain the actual emission power of described each time-frequency block signal.
2, transmission power adjustment method according to claim 1, it is characterized in that, the described operation of the original transmitted power of described each time-frequency block signal being adjusted according to channel yield value is specially: the original transmitted power of described each time-frequency block signal divided by described channel gain, is obtained the actual emission power of each new time-frequency block signal.
3, transmission power adjustment method according to claim 2, it is characterized in that, after obtaining actual emission power, described each time-frequency block signal is judged all whether actual emission power meets preset range, if the actual emission power of time-frequency block signal not in preset range, then is provided with the actual emission power of predetermined transmission power level as this time-frequency block signal.
4, according to claim 2 or 3 described transmission power adjustment methods, it is characterized in that, before divided by described channel gain, also comprise the step that described channel gain is quantified as the numerical value of preset phase and/or amplitude.
5, transmission power adjustment method according to claim 2, it is characterized in that, behind the actual emission power that obtains described each time-frequency block signal, original transmitted power and actual emission power according to described each time-frequency block signal calculate the total original transmitted power of acquisition and total actual emission power respectively, if described total actual emission power greater than total original transmitted power, is then carried out the normalization operation to the actual emission power of described each time-frequency piece.
6, transmission power adjustment method according to claim 5 is characterized in that, if described total actual emission power, is then carried out the normalization operation of preset times greater than total original transmitted power.
7, transmission power adjustment method according to claim 5, it is characterized in that, if described total actual emission power is greater than total original transmitted power, and the ratio of described total actual emission power and total original transmitted power is less than predetermined threshold value, then directly adopt described actual emission power to carry out the signal emission, otherwise carry out the normalization operation.
According to claim 5 or 6 or 7 described transmission power adjustment methods, it is characterized in that 8, the actual emission power that described normalization is operating as described each time-frequency piece all multiply by the adjustment coefficient, obtain new actual emission power.
9, transmission power adjustment method according to claim 8 is characterized in that, the computing formula of described adjustment coefficient is:
δ=∑ | T
Ij|
2/ ∑ | S
Ij|
2, wherein δ represents to adjust coefficient, T
IjThe actual emission power of representing each time-frequency piece, S
IjThe original transmitted power of representing each time-frequency piece, i represent the to transmit sequence number of subcarrier of shared Resource Block, j represent the to transmit symbol of shared Resource Block, i, j are natural number.
10, transmission power adjustment method according to claim 1 is characterized in that, and is before the original transmitted power of described each time-frequency block signal is adjusted, further comprising the steps of:
Whether the channel of judging the signal emission satisfies coherent condition, is then to carry out to adjust operation, otherwise directly adopts original transmitted power to carry out the signal emission.
11, transmission power adjustment method according to claim 10 is characterized in that, the operation whether described channel of judging that signal is launched satisfies coherent condition is specially:
The speed of the judging described terminal threshold value that whether outpaces if surpass, then determines not satisfy coherent condition; Perhaps
Whether the amplitude of variation of judging the channel yield value of described each time-frequency block signal surpasses amplitude threshold, if surpass, then determines not satisfy coherent condition; Perhaps
Judge that whether the real part of channel yield value of described each time-frequency block signal or the symbol continually varying number of times of imaginary part surpass frequency threshold value, if surpass, then determine not satisfy coherent condition.
12, a kind of transmitting power Adjustment System is characterized in that, comprising:
Channel gain obtains module, is used for obtaining according to down-bound pilot frequency signal the channel yield value of each time-frequency piece;
The transmitting power adjusting module obtains module with described channel gain and links to each other, and is used for according to described channel yield value the original transmitted power of described each time-frequency block signal being adjusted, and obtains the actual emission power of described each time-frequency block signal.
13, transmitting power Adjustment System according to claim 12, it is characterized in that, described transmitting power adjusting module further comprises computing module, obtaining module with described channel gain links to each other, be used for original transmitted power with described each time-frequency block signal divided by described channel gain, obtain the actual emission power of each new time-frequency block signal.
14, transmitting power Adjustment System according to claim 13, it is characterized in that, described transmitting power adjusting module also comprises and is used for described each time-frequency block signal is judged all whether actual emission power meets preset range, if the actual emission power of time-frequency block signal not in preset range, then is provided with the module of predetermined transmission power level as the actual emission power of this time-frequency block signal.
15, according to claim 13 or 14 described transmitting power Adjustment System, it is characterized in that described transmitting power adjusting module also comprises quantization modules, is used for described channel gain is quantified as the numerical value of preset phase and/or amplitude.
16, transmitting power Adjustment System according to claim 13 is characterized in that, described transmitting power adjusting module also comprises:
Total original power computing module links to each other with described computing module, is used for according to the total original transmitted power of the original transmitted power calculation of described each time-frequency block signal;
Total actual emission power module links to each other with described computing module, is used for calculating total actual emission power according to the actual emission power of described each time-frequency block signal;
The normalization module, link to each other with total actual emission power module with described total original power computing module, be used for behind the actual emission power that obtains described each time-frequency block signal, if described total actual emission power is greater than total original transmitted power, the actual emission power of described each time-frequency piece is carried out the normalization operation.
17, transmitting power Adjustment System according to claim 12, it is characterized in that, also comprise the coherent condition judge module, obtaining module with described channel gain links to each other with the transmitting power adjusting module, be used to judge whether the channel of signal emission satisfies coherent condition, be then to carry out to adjust operation, otherwise directly adopt original transmitted power to carry out the signal emission.
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| CNA2007101093959A CN101316125A (en) | 2007-05-31 | 2007-05-31 | Emission power regulation method and system |
| PCT/CN2008/071150 WO2008145073A1 (en) | 2007-05-31 | 2008-05-30 | A method, apparatus and tdd system for regulating the transmission power |
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| CNA2007101093959A CN101316125A (en) | 2007-05-31 | 2007-05-31 | Emission power regulation method and system |
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| WO2010124552A1 (en) * | 2009-04-27 | 2010-11-04 | 松下电器产业株式会社 | Wireless communication system and downlink receiving power detection method therefor |
| CN103458530A (en) * | 2013-09-05 | 2013-12-18 | 华为技术有限公司 | Random access method and user equipment |
| CN105848172A (en) * | 2013-12-27 | 2016-08-10 | 京信通信系统（中国）有限公司 | GSM base station amplifier signal coverage adaptation method and device |
| CN109041189A (en) * | 2018-07-20 | 2018-12-18 | 深圳芯之联科技有限公司 | A kind of transmission power control method and device of wireless telecom equipment |
| CN109474306A (en) * | 2018-09-20 | 2019-03-15 | 中国人民解放军63653部队 | A kind of detection decision method based on direct sequence signal capture |
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| EP0741467A2 (en) * | 1995-04-25 | 1996-11-06 | AT&T IPM Corp. | A method and apparatus for power control in wireless networks |
| CN100459755C (en) * | 2002-12-27 | 2009-02-04 | Nxp股份有限公司 | Mobile terminal with power control and method |
| US20060068827A1 (en) * | 2004-09-28 | 2006-03-30 | Lucent Technologies, Inc. | Measuring power of a pilot channel of a transmit signal |
| CN1941689A (en) * | 2005-09-29 | 2007-04-04 | 上海原动力通信科技有限公司 | Method for dispatching sub-frequency band of time-division duplex OFDM system |
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| US9197307B2 (en) | 2009-04-27 | 2015-11-24 | Panasonic Intellectual Property Corporation Of America | Method and terminal apparatus for receiving reference signal |
| CN102362528A (en) * | 2009-04-27 | 2012-02-22 | 松下电器产业株式会社 | Wireless communication system and downlink receiving power detection method therefor |
| CN102362528B (en) * | 2009-04-27 | 2014-05-14 | 松下电器产业株式会社 | Wireless communication system and downlink receiving power detection method therefor |
| CN103841632A (en) * | 2009-04-27 | 2014-06-04 | 松下电器产业株式会社 | Reference signal configuration method, receiving method, base station device and terminal device |
| US9049674B2 (en) | 2009-04-27 | 2015-06-02 | Panasonic Intellectual Property Corporation Of America | Wireless communication system and downlink receiving power detection method therefor |
| WO2010124552A1 (en) * | 2009-04-27 | 2010-11-04 | 松下电器产业株式会社 | Wireless communication system and downlink receiving power detection method therefor |
| CN103458530A (en) * | 2013-09-05 | 2013-12-18 | 华为技术有限公司 | Random access method and user equipment |
| CN103458530B (en) * | 2013-09-05 | 2017-01-25 | 华为技术有限公司 | Random access method and user equipment |
| CN105848172A (en) * | 2013-12-27 | 2016-08-10 | 京信通信系统（中国）有限公司 | GSM base station amplifier signal coverage adaptation method and device |
| CN105848172B (en) * | 2013-12-27 | 2019-07-02 | 京信通信系统（中国）有限公司 | A kind of adaptation method and device of the covering of GSM base discharge signal |
| CN109041189A (en) * | 2018-07-20 | 2018-12-18 | 深圳芯之联科技有限公司 | A kind of transmission power control method and device of wireless telecom equipment |
| CN109041189B (en) * | 2018-07-20 | 2021-07-30 | 深圳全志在线有限公司 | Transmission power control method and device of wireless communication equipment |
| CN109474306A (en) * | 2018-09-20 | 2019-03-15 | 中国人民解放军63653部队 | A kind of detection decision method based on direct sequence signal capture |
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| WO2008145073A1 (en) | 2008-12-04 |
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