CN103841633B - A kind of TD LTE auto gain control methods and equipment - Google Patents
A kind of TD LTE auto gain control methods and equipment Download PDFInfo
- Publication number
- CN103841633B CN103841633B CN201210490955.0A CN201210490955A CN103841633B CN 103841633 B CN103841633 B CN 103841633B CN 201210490955 A CN201210490955 A CN 201210490955A CN 103841633 B CN103841633 B CN 103841633B
- Authority
- CN
- China
- Prior art keywords
- power
- value
- frame
- gain control
- field
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a kind of TD LTE auto gain control methods, respectively frequency point scanning and main synchronizing symbol SS detection-phases in units of frame length, auxiliary synchronizing symbol SSS detection and PBCH read the stage in units of field length, downlink traffic channel receive the stage in units of subframe length, the mean power to respective symbol in each TD LTE frames is calculated；Respectively by the mean power and the upper limit of the power and/or the lower limit of the power, first object performance number, the second target power value comparison, draw the most reasonable power gain control value in each stage；Present invention also offers a kind of TD LTE automatic gain control apparatus；The present invention has distinguished the environmental quality of three phases, improves the flexibility of Power Control.
Description
Technical field
The present invention relates to Long Term Evolution (LTE, Long Term evolution) wireless communication technology, and in particular to a kind of
Time-division Long Term Evolution (TD-LTE, Time Division Long Term Evolution) automatic growth control (AGC,
Automatic Gain Control) method and apparatus.
Background technology
LTE is the evolution of the third generation (3G, Third Generation) GSM, because using OFDM
(OFDM, Orthogonal Frequency Division Multiplexing) technology and multiple-input and multiple-output (MIMO,
Multiple-Input Multiple-Out-put) core technology such as technology can be counted as quasi- 4G technologies.LTE system exists
Descending 100Mbps, up 50Mbps peak rate can be provided under 20MHz spectral bandwidths, the property of Cell Edge User can be improved
Can, improve cell capacity.
At present, LTE system includes TD-LTE and FDD Long Term Evolution (FDD-LTE, FrequencyDivision
Duplexing Long Term evolution), carry out data because identical frequency can be used in TD-LTE in uplink downlink
Transmission, band resource can be saved, and more favored by researcher.
In TD-LTE system, a TD-LTE frame is 10ms, can be divided into two 5ms field, each 5ms field
It can be made up of 5 1ms subframe, each 1ms subframe has the frame number of a unique mark.
In the prior art, in TD-LTE down link signals processing procedure, including the three below stage：Frequency point scanning and master
Synchronizing symbol (PSS, Primary Synchronization Signal) detection-phase, auxiliary synchronizing symbol (SSS, Secondary
Synchronization Signal) detect and Physical Broadcast Channel (PBCH, Physical Broadcasting Channel)
Reading stage, downlink traffic channel receive the stage；Wherein, frequency point scanning is mainly used in equalling the signal power in main diversity antenna
Average, power maximum and power minimum are scanned and investigate interference signal, pass through the investigation to interference signal, PSS inspections
The position for determining PSS symbols in the frame lengths of TD-LTE half is surveyed, now UE may know that 5ms synchronizing informations；SSS is detected for determining
Position of the SSS symbols in frame length, now UE may know that 10ms synchronizing informations, meanwhile, the readable taking-up TD-LTE frame numbers of PBCH are same
Walk information；The 5ms synchronizing informations, 10ms synchronizing informations and frame number synchronization information aggregate are believed as TD-LTE downlink synchronizations
Breath, the usable family equipment (UE, UserEquipment) of frame synchronization information is smoothly received by downlink traffic channel to be transmitted under base station
Number.
It is unavoidable when the signal that base station is sent by handling layer by layer to add interference in the above three stage, enter
And the intensity of signal is weakened, to ensure to signal under base station smoothly reach UE, it can introduce certain in these three stages
Poewr control method.In the prior art, customary means is to be introduced between each stage to ensure by same Poewr control method
Signal intensity stability, but the characteristics of have ignored the signal local environment in these three stages, then, by same power control
Method processed be applied to these three different stages will seem dumb, therefore in the urgent need to one kind can flexible Application to this three
The Poewr control method in individual stage.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of TD-LTE auto gain control methods and equipment, energy
It is enough to solve the inflexible problem of Poewr control method in the prior art.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
The invention provides a kind of TD-LTE auto gain control methods, methods described includes：
Respectively frequency point scanning and main synchronizing symbol PSS detection-phases in units of frame length, auxiliary synchronizing symbol SSS detection and
Physical Broadcast Channel PBCH read the stage in units of field length, downlink traffic channel receive the stage in units of subframe length, it is right
The mean power of respective symbol is calculated in each TD-LTE frames；Pass through the mean power and the upper limit of the power and/or work(respectively
Rate lower limit, first object performance number, the comparison of the second target power value, draw the most reasonable power gain control in each stage
Value.
In such scheme, in the frequency point scanning and PSS detection-phases, methods described includes：
Each Symbol average performance number of current TD-LTE frames is calculated in units of 10ms frame lengths and maximum average work(is determined
Rate value, maximum average power value is compared with the upper limit of the power and/or the lower limit of the power, according to comparative result, exports current TD-
LTE frames are detected and PBCH reading stages or the processing for carrying out next TD-LTE frames in this stage power gain control value to SSS.
In such scheme, the stage is read in SSS detections and PBCH, methods described includes：
Receiving power gain control value, calculates reference field PSS symbols, SSS in units of the 5ms field length of TD-LTE frames
Symbol average performance number, the reference field PSS symbols, SSS Symbol averages performance number and the first object performance number that calculate are entered
Row compares, and is updated according to comparative result and exports reference field in this stage power gain control value to downlink traffic channel reception
Stage carries out the processing of next field or carries out the processing of next field simultaneously.
In such scheme, the stage is received in the downlink traffic channel, methods described includes：
Receiving power gain control value, in units of the 1ms subframe length of TD-LTE frames, will calculate present sub-frame R/S symbol and puts down
Equal performance number, and the present sub-frame R/S symbol average power content calculated and the second target power value are compared, foundation than
Relatively result updates present sub-frame in this stage power gain control value and notified to current user equipment UE or the next subframe of progress
Processing.
In such scheme, methods described includes：
The power gain ranges that radio frequency chip is indicated are received, and power gain ranges are averagely divided into multiple subsegments, are obtained
To average power gain variable quantity；
The first frame initial power yield value that renewal current UE is received is the value of minimum gain value, utilizes mean power
Computational methods, calculate each Symbol average performance number in the first frame length, compare and find out the average power content of maximum, as
First frame maximum average power value；
When the first frame maximum average power value is more than the upper limit of the power, the first frame initial power yield value is updated, the is used as
Two frame initial power yield values；
When the first frame maximum average power value, which is less than the upper limit of the power, is less than the lower limit of the power simultaneously, the first frame initial power is updated
Rate yield value, is used as the second frame initial power yield value；
When the first frame maximum average power value is simultaneously greater than the lower limit of the power less than the upper limit of the power, the first frame initial power is updated
Rate yield value, is used as the second frame initial power yield value；
The PSS detections and PBCH are output to using the first frame maximum average power value as the second frame power gain control value
The reading stage；
Method is calculated using mean power, each Symbol average performance number in the second frame length is calculated, compares and finds out
Maximum average power content, as the second frame maximum average power value,
When the second frame maximum average power value is more than the upper limit of the power, the second frame initial power yield value is updated, the is used as
Three frame initial power yield values；
When the second frame maximum average power value, which is less than the upper limit of the power, is less than the lower limit of the power simultaneously, the second frame initial power is updated
Rate yield value, is used as the 3rd frame initial power yield value；
When the second frame maximum average power value is simultaneously greater than the lower limit of the power less than the upper limit of the power, the second frame initial power is updated
Rate yield value, is used as the 3rd frame initial power yield value；
The PSS detections and PBCH are output to using the second frame maximum average power value as the second frame power gain control value
The reading stage；
By that analogy, until completing all frames that UE is received.
In such scheme, methods described includes：
The power output controlling value sent by the frequency point scanning and PSS detection-phase present frames is received, and as current
Frame the first field initial power yield value；
Method is calculated according to mean power, the first field PSS symbols, mean power of the SSS symbols in frequency domain is calculated,
It is filtered via loop filter circuit, now average power content is used as present frame the first field average power content；
Judge whether the first field average power content equal with first object performance number, when the first field average power content with
When first object performance number is equal, into the processing of the field of present frame second；When the first field average power content and first object
When performance number is unequal, the first field average power gain value is updated, as reference field power gain control value, institute is output to
State downlink traffic channel and receive the stage, while being handled into the field of present frame second；
The entrance is processed as to the field of present frame second：
Method is calculated according to mean power, the second field PSS symbols, mean power of the SSS symbols in frequency domain is calculated,
It is filtered via loop filter circuit, now average power content is used as the second field average power content；
Judge whether the second field average power content equal with first object performance number, when the second field average power content with
When first object performance number is equal, into the processing of the field of present frame the 3rd；When the second field average power content and first object
When performance number is unequal, the second field average power gain value is updated, as reference field power gain control value, institute is output to
State downlink traffic channel and receive the stage, while being handled into the field of present frame the 3rd；
By that analogy, until completing all fields that UE is received.
In such scheme, methods described includes：
The downlink traffic channel receives the reference field that stage reception is detected by the PSS and the PBCH reading stages send
Power gain control value, and variable bandwidth processing is carried out to reference field power gain control value, by the reference field work(after processing
Rate gain control value as reference field the first subframe initial power yield value；
Method is calculated according to mean power, mean power of the first subframe R/S symbol in frequency domain is calculated, via loop
After filter circuit filtering, now average power content is reference field the first subframe average power content；
Compare the first subframe average power content whether equal with the second target power value, when the first subframe average power content with
When second target power value is equal, into the processing of the subframe of reference field second；When the first subframe average power content and the second mesh
Mark performance number it is unequal when, update the first subframe average power gain value, as present sub-frame power gain control value, notify to
Current UE；Meanwhile, into the processing of the subframe of reference field second；
The entrance is processed as to the subframe of reference field second：
Method is calculated according to mean power, mean power of the second subframe R/S symbol in frequency domain is calculated, via loop
After filter circuit filtering, now average power content is reference field the second subframe average power content；
Compare the second subframe average power content whether equal with the second target power value, when the second subframe average power content with
When second target power value is equal, into the processing of the subframe of reference field the 3rd；When the second subframe average power content and the second mesh
Mark performance number it is unequal when, update the second subframe average power gain value, as present sub-frame power gain control value, notify to
Current UE；Meanwhile, into the processing of the subframe of reference field the 3rd；
By that analogy, until completing all subframes that current UE is received.
Present invention also offers a kind of TD-LTE automatic gain control apparatus, the equipment includes：First stage power increases
Beneficial control module, second stage power gain control module, phase III power gain control module and loop filter circuit；Its
In,
The first stage power gain control module, in units of 10ms frame lengths, calculating current TD-LTE frames each
Individual Symbol average performance number simultaneously determines maximum average power value, by maximum average power value and the upper limit of the power and/or the lower limit of the power
It is compared, draws this stage most reasonable power gain control value；
The second stage power gain control module, in units of the 5ms field length of TD-LTE frames, calculating current
Field PSS symbols, the average power content of SSS symbols, and by the mean power of the reference field PSS symbols calculated, SSS symbols
Value is compared with first object performance number, draws this stage most reasonable power gain control value；
The phase III power gain control module, in units of the 1ms subframe length of TD-LTE frames, calculating current
The average power content of subframe R/S symbol, and by the average power content and the second target power value of the present sub-frame R/S symbol calculated
It is compared, draws this stage most reasonable power gain control value；
The loop filter circuit, for second stage power gain control module and phase III power gain control
The average power content that module is calculated is filtered.
In such scheme, the first stage power gain control module includes：First processing submodule and first updates
Output sub-module；Wherein,
The first processing submodule, in units of 10ms frame lengths, calculating current each Symbol average of TD-LTE frames
Performance number, and relatively more current each Symbol average performance number size of TD-LTE frames, determine present frame maximum average power value, right
Present frame maximum average power value is compared with the upper limit of the power and/or the lower limit of the power；
Described first updates output sub-module, for according to comparative result, updating current TD-LTE frames power gain control
Value, as next frame initial power yield value and is sent to the first processing submodule or exports current TD-LTE frames power
Gain control value is to the second stage power gain control module, as present frame in the first stage power gain control
Power gain control value in module；
The first processing submodule, is additionally operable at the beginning of receiving from the described first next frame for updating output sub-module
After beginning power gain value, proceed by next frame processing.
In such scheme, the second stage power gain control module includes：Second processing submodule and second updates
Output sub-module；
The second processing submodule, puts down in units of 5ms frame lengths, calculating reference field PSS symbols, SSS symbols
Equal performance number；And compare the reference field PSS symbols calculated, SSS Symbol averages performance number and first object performance number size；
Described second updates output sub-module, for according to comparative result, updating reference field power gain value and exporting
To the phase III power gain control module, at the same notify the second processing submodule carry out next field processing or
The second processing submodule is notified to carry out next field processing；
The second processing submodule, is additionally operable to receive after the notice sent by the described second renewal output sub-module, opens
Beginning is handled next field.
In such scheme, the phase III power gain control module includes：3rd processing submodule and the 3rd updates
Output sub-module；Wherein,
The 3rd processing submodule, for calculating present sub-frame reference signal R/S symbol average power content, and compares meter
The present sub-frame R/S symbol average power content calculated and the second target power value size；
Described 3rd updates output sub-module, for according to comparative result, updating present sub-frame power gain control value, and
Notify to current UE, while notifying the 3rd processing submodule to carry out next subframe processing or notifying the 3rd processing
Module carries out next subframe processing；
The 3rd processing submodule, is additionally operable to after the notice that reception is sent by the described 3rd renewal output sub-module,
Start to handle next subframe.
TD-LTE auto gain control methods and equipment that the present invention is provided, it is treated for TD-LTE down link signals
The environmental quality of included three phases in journey, respectively in units of frame length, half frame length, subframe length, in each TD-LTE frame
The mean power of respective symbol calculated, and pass through the mean power and the upper limit of the power and/or the lower limit of the power, the respectively
The comparison of one target power value, the second target power value, draws the most reasonable power gain control value in each stage；The present invention
The environmental quality of included three phases in TD-LTE down link signal processing procedures has been distinguished, the spirit of Power Control is added
Activity.
Brief description of the drawings
Fig. 1 is the implementation process schematic diagram of TD-LTE auto gain control methods of the present invention；
Fig. 2 shows for the implementation process in frequency point scanning and PSS detection-phases TD-LTE auto gain control methods of the present invention
It is intended to；
Fig. 3 is to detect to show with the PBCH implementation processs for reading stage TD-LTE auto gain control methods of the present invention in SSS
It is intended to；
Fig. 4 receives the implementation process signal of stage TD-LTE auto gain control methods of the present invention in downlink traffic channel
Figure；
Fig. 5 is the composition structural representation of TD-LTE automatic gain control apparatus of the present invention.
Embodiment
The TD-LTE auto gain control methods that the present invention is provided, methods described includes：
Respectively frequency point scanning and PSS detection-phases in units of frame length, SSS detection and PBCH read the stage with half frame length
The stage is received in units of subframe length for unit, downlink traffic channel, and the mean power to respective symbol in each TD-LTE frames is entered
Row is calculated；Pass through the mean power and the upper limit of the power and/or the lower limit of the power, first object performance number, the second target work(respectively
The comparison of rate value, draws the most reasonable power gain control value in each stage.
Here, what frequency point scanning and PSS detection-phases were calculated be each symbol of each TD-LTE frames mean power；
It is PSS symbols in each TD-LTE fields, the mean power of SSS symbols that SSS, which is detected, and PBCH reads that the stage calculates；It is descending
What Traffic Channel received stage calculating is the mean power of R/S symbol in each TD-LTE subframes.
As shown in figure 1, methods described specifically includes step 10, step 20 and step 30：
Step 10：Each Symbol average performance number of current TD-LTE frames is calculated in units of 10ms frame lengths and maximum is determined
Average power content, and the maximum average power value calculated and the upper limit of the power and/or the lower limit of the power are compared, foundation compares
As a result current TD-LTE frames are exported to read the stage to SSS detections and PBCH in this stage power gain control value or carry out next
The processing of TD-LTE frames；
Here, for the environmental quality of frequency point scanning and PSS detection-phases, in units of 10ms frame lengths；
Specifically, because for frequency point scanning and PSS detection-phases, current UE does not get any synchronizing information, institute also
To be that in 10ms time, up, downstream signal in whole cell are likely to be used by current UE in a TD-LTE frame length
Make mean power estimation.So, the environmental quality having for this stage, using a kind of statistics AGC method, can obtain compared with
Good power gain control.
Current UE receive radio circuit signal, the radio circuit include power amplifier, analog-digital converter (ADC,
Analog Digital Conversion), radio frequency chip etc.；Wherein, radio frequency chip production firm dispatches from the factory in the radio frequency chip
When indicated the applicable power gain ranges of the radio frequency chip：From minimum gain value G_min to maxgain value G_max；Institute
State power gain ranges different because of the model of radio frequency chip difference, it is also different because of production firm's difference.
As shown in Fig. 2 the concrete processing procedure of step 10 can be：
The power gain ranges M that radio frequency chip is indicated averagely is divided into N number of subsegment, the average power gain of each subsegment
For M/N (db), using M/N (db) as average power gain variable quantity, wherein, N is positive integer；
It is assumed here that the number for all TD-LTE frames that current UE is received is i, i is positive integer, then, it will can connect
All TD-LTE frames received are arranged as the first frame, second the i-th frame of frame ...；
First the first frame is handled, it is minimum gain value G_min's to update the first frame initial power yield value A_G (1)
Value；
First frame power gain initial value A_G (1) is updated in mean power value calculating method of the prior art, counted
Calculate each Symbol average performance number in the first frame length；
Compare each Symbol average performance number size in the first frame length, and find out maximum average power value, be used as first
Frame maximum average power value；
Compare the first frame maximum average power value and upper limit of the power PmaxlimSize, when the first frame maximum average power value
More than upper limit of the power PmaxlimWhen, the first frame initial power yield value A_G (2)=A_G (1)+M/N is updated, it is initial as the second frame
Power gain value, into the processing of the second frame；When the first frame maximum average power value is less than upper limit of the power PmaxlimWhen, then compare
First frame maximum average power value and lower limit of the power PminlimSize；
When the first frame maximum average power value is less than lower limit of the power PminlimWhen, update the first frame initial power yield value A_G
(2)=A_G (1)-M/N, as the second frame initial power yield value, into the processing of the second frame；When the average work(of the first frame maximum
Rate value is more than lower limit of the power PminlimWhen, the first frame initial power yield value A_G (1) of output to SSS detections and PBCH read rank
Section, the power gain control value result1 exported as the first frame in frequency point scanning and PSS detection-phases；
It is described to be specifically as follows into the processing of the second frame：
Second frame power gain initial value A_G (2) is updated to mean power value calculating method of the prior art, calculated
Go out the average power content of each symbol the second frame length Nei；
Compare in the second frame length the average power content size of each symbol and find out maximum average power value, be used as second
Frame maximum average power value；
Compare the second frame maximum average power value and upper limit of the power PmaxlimSize, when the second frame maximum average power value
More than upper limit of the power PmaxlimWhen, the second frame initial power yield value A_G (3)=A_G (2)+M/N is updated, it is initial as the 3rd frame
Power gain value, into the processing of the 3rd frame；When the second frame maximum average power value is less than upper limit of the power PmaxlimWhen, then compare
Second frame maximum average power value and lower limit of the power PminlimSize；
When the second frame maximum average power value is less than lower limit of the power PminlimWhen, update the second frame initial power yield value A_G
(3)=A_G (2)-M/N, as the 3rd frame initial power yield value, into the processing of the 3rd frame；When the average work(of the second frame maximum
Rate value is more than lower limit of the power PminlimWhen, export the second frame initial power yield value A_G (2), as the second frame in frequency point scanning and
The power gain control value result1 of PSS detection-phases output；
The detailed process handled the 3rd frame that enters enters similar to the implementation process of the second frame processing with above-mentioned, with
This analogizes, until having handled all frames that current UE is received.
In step 10, the upper limit of the power Pmaxlim, lower limit of the power PminlimPre-set；For different frames, institute
State upper limit of the power Pmaxlim, lower limit of the power PminlimDesirable identical value, also can use different value；
Wherein, upper limit of the power PmaxlimSpan be 10log10 (2m)+15 (db), lower limit of the power PminlimValue model
Enclose for 10log10 (2m) -15 (db), m is the bit wide of ADC devices；The bit wide of ADC devices has been indicated when ADC devices dispatch from the factory
Bit wide scope.
In addition, parameter N span is 3~6, it can be adjusted flexibly according to actual environment (such as field testing)；When
Actual environment requirement have compared with rapid convergence and to gain accuracy area requirement it is not high when, can use N is smaller value；Conversely, desirable N is phase
To higher value；Because this stage is the processing to frame progress, therefore this stage is calculating each Symbol average work(in each frame length
After rate value, without being filtered processing by loop filter circuit again.
Above it is stated that after frequency point scanning and PSS detection-phases terminate, it may be determined that PSS symbols are in the frame lengths of TD-LTE half
In position, that is, field sync is determined, that is to say, that current UE has now known 5ms synchronizing informations, SSS detection and
PBCH reads the stage, and 5ms synchronizing informations will be made full use of to carry out the automatic growth control in SSS detections and PBCH reading stages.
Step 20：Receiving power gain control value, calculates reference field PSS in units of the 5ms field length of TD-LTE frames
Symbol, SSS Symbol average performance numbers, by the reference field PSS symbols, SSS Symbol averages performance number and the first object that calculate
Performance number is compared, and is updated according to comparative result and is exported reference field in this stage power gain control value to downlink business
Channel receives the stage while carrying out the processing of next field or carrying out the processing of next field；
Here, the environmental quality that the stage is read with PBCH is detected for PSS, in units of the 5ms field length of TD-LTE frames；
It can be seen that from such scheme, frequency point scanning and PSS detection-phases are carried out for mono- TD-LTE frame of 10ms
After processing, frequency point scanning and PSS detection-phases terminate, current UE has known 5ms synchronizing informations, i.e. field sync information, really
The signal time window of PSS symbols is determined；So, in SSS detections, it can determine the signal time window of SSS symbols；
Here, the signal time window of PSS symbols and SSS symbols can regard two points in time coordinate axle as, i.e.,：PSS is accorded with
Number and position of the SSS symbols in the frame lengths of TD-LTE half have determined, so that it may so that PSS symbols in half frame length and SSS symbols to be carried
Take out；It will thus be seen that this stage is handled mainly for TD-LTE field length；Here, by current 10ms TD-LTE
Frame is divided into the first field and the second field, and first field and the second field are 5ms frame length.
As shown in figure 3, the concrete processing procedure of step 20 can be：
The result1 for receiving frequency point scanning and the output of PSS detection-phases is used as this stage initial power yield value；
For TD-LTE system, first result1 is worked as this stage the first subframe initial power yield value extracting
After preceding 10ms TD-LTE frames the first field PSS symbols and SSS symbols, using prior art calculate the first field PSS symbols,
Mean power of the SSS symbols in frequency domain, and carry out multiple cumulative mean, be filtered again by loop filter circuit, so as to
Noise is filtered out, acquired results are the first field average power content p1；
Judge whether the first field average power content p1 is equal with first object performance number Target, when p1 is equal to Target
When, using result1 as the second field initial power yield value, into the place of the field of TD-LTE frames second to current t0ms
Reason；When p1 is not equal to Target, power gain control value result2=result1+ of first field in this stage is updated
(Target-p1), and export result2 to downlink traffic channel receive the stage, the second field initial power is used as using result2
Yield value, into the processing of the field of TD-LTE frames second to current 10ms；
The processing that enters to the current 10ms field of TD-LTE frames second is specially：Extract current 10ms TD-LTE
Frame the second field PSS symbols and SSS symbols, and calculate the second field average power content p2 using prior art；Then, judge
Whether the second field average power content p2 is equal with target power value Target, when p2 is equal to Target, into next TD-
First field of LTE frames；When p2 is not equal to Target, the second field is updated in this stage power gain control value result 2
=p_old+ (Target-p2) simultaneously exports result 2 to the downlink traffic channel reception stage；
Here, when the condition establishment from " when p1 is not equal to Target " is gone to now, then p_old=result2 is taken；When
Set up and gone to now from the condition of " when p1 is equal to Target ", then take p_old=result1；
By that analogy, until having handled all fields that current UE is received.
Here, first object performance number Target value will be according to the ADC devices actually selected in TD-LTE system
The risk of saturation is designed in the case of bit wide m and larger noise/interference, generally takes Target=2m。
Simultaneously as this stage is handled for TD-LTE fields, half frame time is shorter, in loop filter circuit
In, it is necessary to relatively large loop filtering coefficient be pre-set, to ensure the Fast Convergent of field symbol.
It is every being related to loop filtering coefficient when illustrating to technical solution of the present invention under illustrating herein, take loop
The span of filter factor is 0.04~0.5.
In addition, when carrying out step 20 explanation, mainly by taking the TD-LTE system of 1.4M bandwidth as an example, technical side of the invention
Case includes but is not limited to the TD-LTE system of 1.4M bandwidth, can be applicable to the TD-LTE system of other bandwidth, such as 10M,
TD-LTE system of 15M, 20M bandwidth etc..
Step 30：Receiving power gain control value, calculates present sub-frame RS symbols in units of the 1ms subframe length of TD-LTE frames
Number average power content, and the present sub-frame R/S symbol average power content calculated and the second target power value are compared, according to
Present sub-frame is updated in this stage power gain control value according to comparative result, and is notified current UE or carried out next subframe processing；
Here, the environmental quality in stage is received for downlink traffic channel, in units of the 1ms subframe length of TD-LTE frames；
The stage is received for downlink traffic channel, current UE has known 5ms synchronizing informations, 10ms synchronizing informations and frame number
The TD-LTE downlink synchronization information such as synchronizing information, that is to say, that can determine by downlink synchronization current UE each
Position of reference signal (RS, the Referenc Signal) symbol in respective subframe in 1ms subframes, then, it is possible to will be every
RS is extracted in individual subframe；It can thus be seen that this stage is handled mainly for TD-LTE each 1ms subframes；
Here, by current 5ms TD-LTE fields be divided into the first subframe, the second subframe, the 3rd subframe, the 4th subframe,
5th subframe, each subframe length is 1ms.
Due to being detected for SSS and PBCH reads the bandwidth in stage and this stage and there is different situation, this stage with
Exemplified by the TD-LTE system of 20M bandwidth, because power and the proportional relation of bandwidth, i.e., as bandwidth increases, power also accordingly increases
By force.In order to reach that SSS detections and PBCH reading stages are connected with the more preferable of this stage, here, it is necessary to read SSS detections and PBCH
The power gain control value result2 that the stage sends is taken first to carry out variable bandwidth processing.
As shown in figure 4, the concrete processing procedure of step 30 can be：
Variable bandwidth processing is carried out such as to the power gain control value result2 that SSS detections and PBCH reading stages are sent
Shown in formula (1)：
Result2_new=result2-10*log10 (Bnew/Bold)(1)
Wherein, variable BoldBy the TD-LTE system bandwidth that SSS is detected and the PBCH reading stages use；BnewFor this stage
Used TD-LTE system bandwidth.
Read the first subframe initial power yield value that result2_new is this stage；
After current 5ms TD-LTE fields the first subframe R/S symbol is extracted, calculated using prior art and work as first half
Mean power of frame the first subframe R/S symbol in frequency domain, loop filtering is carried out using loop filter circuit, to filter out noise,
Acquired results are the first subframe average power content M_p1；
Judge whether the first subframe average power content M_p1 is equal with the second target power value Tar, when M_p1 is equal to Tar
When, using result2_new as the second subframe initial power yield value, the second subframe is handled；When M_p1 is not equal to Tar
When, power gain control value result3=result2_new+ (Tar-M_p1) of first subframe in this stage is updated, and will
Result3 values notify current UE, and using result3 as the second subframe initial power yield value, the second subframe is handled；
Wherein, it is described that second subframe progress processing is specifically as follows：Extract current 5ms of TD-LTE fields second
Frame R/S symbol, and mean power of the second subframe R/S symbol in frequency domain is calculated using prior art, utilize loop filter circuit
Loop filtering is carried out, to filter out noise, acquired results are the second subframe average power content M_p2；
Judge whether the second subframe average power content M_p2 is equal with the second target power value Tar, when M_p2 is equal to Tar
When, using result2_new as the second subframe initial power yield value, the 3rd subframe is handled；When M_p2 is not equal to Tar
When, update the second subframe and lead in this stage power gain control value result3=Y+ (Tar-M_p2), and by result3 values
Know current UE, using result3 as the 3rd subframe initial power yield value, the 3rd subframe is handled；
Here, when from " M_p1 is equal to the establishment of Tar " conditions and gone to now, Y=result2_new；When from " M_p1
Set up and gone to now in Tar " conditions, Y=result3；
By that analogy, until having handled each subframe that current UE is received.
In step 30, the second target power value Tar is according to the bit wide m of the ADC devices actually selected in TD-LTE system
To design, Target=2m, the ADC devices bit wide m is generally taken to indicate bit wide when dispatching from the factory.
Control frequency in view of this demands is higher, it is necessary to select to filter compared with minor loop in loop filter circuit
Coefficient, to ensure the stabilization of downlink.
Based on above-mentioned TD-LTE auto gain control methods.Set present invention also offers a kind of TD-LTE automatic growth controls
It is standby, as shown in figure 5, the equipment includes：First stage power gain control module 50, second stage power gain control module
51st, phase III power gain control module 52 and loop filter circuit 53；Wherein,
The first stage power gain control module 50, in units of 10ms frame lengths, calculating current TD-LTE frames
Each Symbol average performance number simultaneously determines maximum average power value, by under maximum average power value and the upper limit of the power and/or power
Limit is compared, and draws this stage most reasonable power gain control value；
The second stage power gain control module 51, in units of the 5ms field length of TD-LTE frames, calculating and working as
Preceding field PSS symbols, the average power content of SSS symbols, and by the reference field PSS symbols calculated, the average work(of SSS symbols
Rate value is compared with first object performance number, draws this stage most reasonable power gain control value；
The phase III power gain control module 52, in units of the 1ms subframe length of TD-LTE frames, calculating and working as
The average power content of preceding subframe R/S symbol, and by the average power content and the second target power of the present sub-frame R/S symbol calculated
Value is compared, and draws this stage most reasonable power gain control value；
The loop filter circuit 53, for second stage power gain control module 51 and phase III power gain
The average power content that control module 52 is calculated is filtered.
Here, the first stage is frequency point scanning and PSS detection-phases, and second stage is that SSS detections and PBCH read the stage,
Phase III is that downlink traffic channel receives the stage.
Specifically, the first stage power gain control module 50, receives the power gain ranges that radio frequency chip is indicated
M, and M is averagely divided into N number of subsegment, it regard M/N (db) as average power gain variable quantity；Then current UE is updated to receive
The first frame initial power yield value be minimum gain value value, utilize mean power of the prior art calculate method, meter
Each Symbol average performance number in the first frame length is calculated, the average power content of maximum is compared and finded out, it is maximum as the first frame
Average power content；
The first frame initial power yield value is updated when the first frame maximum average power value is more than the upper limit of the power, second is used as
Frame initial power yield value；
When the first frame maximum average power value, which is less than the upper limit of the power, is less than the lower limit of the power simultaneously, the first frame initial power is updated
Rate yield value, is used as the second frame initial power yield value；
When the first frame maximum average power value is simultaneously greater than the lower limit of the power less than the upper limit of the power, the first frame initial power is updated
Rate yield value, is used as the second frame initial power yield value；The first frame initial power yield value is used as present frame power gain simultaneously
Controlling value is output to the second stage power gain control module 51；
According to above-mentioned technical proposal, the second frame that the first stage power gain control module 50 is received to current UE
Handled, until completing all frames received.
Here, power gain ranges, minimum gain value have indicated value when the radio frequency chip dispatches from the factory.
The second stage power gain control module 51 is received to be sent out by the first stage power gain control module 50
The present frame power output controlling value come, is used as present frame the first field initial power yield value；
Method is calculated according to prior art mean power, the second stage power gain control module 51, which can be calculated, to be worked as
Previous frame the first field PSS symbols, mean power of the SSS symbols in frequency domain, then the second stage power gain control mould
Block 51 sends the mean power calculated to the loop filter circuit 53, after the loop filter circuit 53 is filtered,
Return again to the second stage power gain control module 51, it is the first field mean power now to return to average power content
Value；
The second stage power gain control module 51, receives and judges the first field average power content and first object
Whether performance number is equal；
When the first field average power content is equal with first object performance number, the second power gain control module
51, it is initial as the second field using the present frame power output controlling value that the first stage power gain control module 50 is sent
Power gain value, starts to handle the second field of present frame according to above-mentioned technical proposal；
When the first field average power content and first object performance number are unequal, the second stage power gain control
Module 51 updates the first field average power gain value, as reference field power gain control value, is output to institute's phase III
Power control module 52；Meanwhile, the second field initial power gain is used as using the first field average power gain value after renewal
Value, starts to handle the second field of present frame according to above-mentioned technical proposal；
According to above-mentioned technical proposal, the second stage power gain control module 51 is carried out to the second field of present frame
Processing, until having handled all fields that current UE is received.
The phase III power gain control module 52, reception is sent out by the second stage power gain control module 51
Carry out reference field power gain control value, and variable bandwidth processing carried out to reference field power gain control value using formula (1),
It regard the reference field power gain control value after processing as reference field the first subframe initial power yield value；
Method is calculated according to prior art mean power, the phase III power gain control module 52 calculates first
Mean power of the subframe R/S symbol in frequency domain, sends the mean power calculated to the loop filter circuit 53, by described
After loop filter circuit 53 is filtered, returns again to the phase III power gain control module 52, now return average
Performance number is the first subframe average power content；
Compare the first subframe average power content whether equal with the second target power value；
When the first subframe average power content is equal with the second target power value, made with the first subframe initial power yield value
For the second frame initial power yield value, the phase III power gain control module 52 starts to working as according to above-mentioned technical proposal
Second subframe of preceding field is handled；
When the first subframe average power content and unequal the second target power value, the phase III power gain control
Module 52 updates the first subframe average power gain value, as present sub-frame power gain control value, notifies to current UE；Simultaneously
Using the first subframe average power gain value after renewal as the second frame initial power yield value, start according to above-mentioned technical proposal
The second subframe to reference field is handled；
According to above-mentioned technical proposal, the phase III power gain control module 52 is entered to the second subframe of reference field
Row processing, until having handled all subframes that current UE is received.
The first stage power gain control module 50 further comprises that the first processing submodule 500 and first updates defeated
Go out submodule 501；Wherein,
The first processing submodule 500, puts down in units of 10ms frame lengths, calculating current each symbol of TD-LTE frames
Equal performance number, and relatively more current each Symbol average performance number size of TD-LTE frames, determine present frame maximum average power value,
To present frame maximum average power value is compared with the upper limit of the power and/or the lower limit of the power；
Described first updates output sub-module 501, for according to comparative result, updating current TD-LTE frames power gain control
Value processed, as next frame initial power yield value and is sent to the first processing submodule 500 or exports current TD-LTE frames
Initial power yield value, is used as current TD-LTE power gain controls value to the second stage power gain control module 51；
The first processing submodule 500 is additionally operable to receiving under the described first renewal output sub-module 501
After one frame initial power yield value, proceed by next frame processing；
It is defeated that the second stage power gain control module 51 further comprises that second processing submodule 510 and second updates
Go out submodule 511；
The second processing submodule 510, in units of 5ms frame lengths, calculating reference field PSS symbols, SSS symbols
Average power content；And it is big to compare reference field PSS symbols, SSS Symbol averages performance number and the first object performance number calculated
It is small；
Described second updates output sub-module 511, for according to comparative result, updating and exporting reference field power gain
It is worth the phase III power gain control module 52, while notifying the second processing submodule 510 to carry out next field
Processing；Or only notify the second processing submodule 510 to carry out next field processing；
The second processing submodule 510 is additionally operable to receive the notice sent by the described second renewal output sub-module 511
Afterwards, start to handle next field.
The phase III power gain control module 52 further comprises that the 3rd processing submodule 520 and the 3rd updates defeated
Go out submodule 521；Wherein,
The 3rd processing submodule 520, for calculating after variable bandwidth, calculates present sub-frame R/S symbol average power content,
And compare the present sub-frame R/S symbol average power content calculated and the second target power value size；
Described 3rd updates output sub-module 521, for updating present sub-frame power gain control value according to comparative result,
And notify to current UE, while notifying the 3rd processing submodule 520 to carry out next subframe processing；Or only notify the described 3rd
Processing submodule 520 carries out next subframe processing；
The 3rd processing submodule 520 is additionally operable to receive the notice sent by the described 3rd renewal output sub-module 521
Afterwards, start to handle next subframe.
Specifically, when current UE is in frequency point scanning and PSS detection-phases, first, the first processing submodule
The 500 reception power gain ranges M that indicate of radio frequency chips, and M is averagely divided into N number of subsegment, then, M/N (db) is every
Individual subsegment average power gain；
Here, using M/N (db) as average power gain variable quantity, wherein N is positive integer；The radio frequency chip is dispatching from the factory
When, indicate minimum gain value G_min and maxgain value G_max；
Current UE is connected into all frames to arrange in numerical order in order, is the first frame, second the i-th frame of frame ..., i is positive integer；
The first processing submodule 500, handles the first frame, updates the first frame initial power yield value A_ first
G (1) is minimum gain value G_min value；
Method is calculated using mean power of the prior art, the first processing submodule 500 calculates the first frame length
Each Symbol average performance number in degree；And compare in the first frame length each Symbol average performance number size and find out maximum average
Performance number, is used as the first frame maximum average power value；
When the first frame maximum average power value is more than upper limit of the power PmaxlimWhen, described first updates output sub-module 501 more
New first frame initial power yield value A_G (2)=A_G (1)+M/N, as the second frame initial power yield value, described first more
A_G (2) now is output to the first processing submodule 500 by new output sub-module 501；
When the first frame maximum average power value is less than upper limit of the power PmaxlimWhen, the first processing submodule 500 compares first again
Frame maximum average power value and lower limit of the power PminlimSize,
When the first frame maximum average power value is less than lower limit of the power PminlimWhen, described first updates output sub-module 501 more
New first frame initial power yield value A_G (2)=A_G (1)-M/N, as the second frame initial power yield value, described first more
A_G (2) now is output to the first processing submodule 500 by new output sub-module 501；
When the first frame maximum average power value is more than lower limit of the power PminlimWhen, the first renewal output sub-module 501 is defeated
Go out A_G (1) value and be sent to the second stage power gain control module 51, be specifically sent to the second processing submodule
510, the power gain control value result1 exported as the first frame in frequency point scanning and PSS detection-phases；
The first processing submodule 500 is received after A_G (2), utilizes mean power calculating side of the prior art
Method, the first processing submodule 500 calculates each Symbol average performance number in the second frame length；And compare the second frame length
Interior each Symbol average performance number size simultaneously finds out maximum average power value, is used as the second frame maximum average power value；
When the second frame maximum average power value is more than upper limit of the power PmaxlimWhen, described first updates output sub-module 501 more
New second frame initial power yield value A_G (3)=A_G (2)+M/N, as the 3rd frame initial power yield value, described first more
A_G (3) now is output to the first processing submodule 500 by new output sub-module 501；
When the second frame maximum average power value is less than upper limit of the power PmaxlimWhen, the first processing submodule 500 compares second again
Frame maximum average power value and lower limit of the power PminlimSize,
When the second frame maximum average power value is less than lower limit of the power PminlimWhen, described first updates output sub-module 501 more
New second frame initial power yield value A_G (3)=A_G (2)-M/N, as the 3rd frame initial power yield value, described first more
A_G (3) now is output to the first processing submodule 500 by new output sub-module 501；
When the first frame maximum average power value is more than lower limit of the power PminlimWhen, the first renewal output sub-module 501 is defeated
Go out A_G (2) value and be sent to the second stage power gain control module 51, be specifically sent to the second processing submodule
510, it is used as the second frame power gain control value result1 that power gain control module 50 is exported in the first stage；
According to above-mentioned technical proposal, the first processing submodule 500 updates after A_G (3) is received with reference to first
Output sub-module 501 completes the processing to the 3rd frame, by that analogy, until completing that all frame processing are received to current UE.
Here, the upper limit of the power Pmaxlim, lower limit of the power PminlimIn the first stage power gain control module 50
In pre-set, specifically set in the described first processing submodule 500；For different frames, on the power
Limit Pmaxlim, lower limit of the power PminlimDesirable identical value also can use different value；
Wherein, upper limit of the power PmaxlimSpan be 10log10 (2m)+15 (db), lower limit of the power PminlimValue model
Enclose for 10log10 (2m) -15 (db), m is the bit wide of ADC devices in radio circuit；The signal that the radio circuit is sent is by working as
Preceding UE is received；
In addition, parameter N span is 3~6, pre-set in the first stage power gain control module 50
Alright, it is specifically to be set in the described first processing submodule 500；Because this stage is the processing to frame progress, therefore described
First processing submodule 500 is calculated after the average power content of each symbol every frame length Nei, without again by each symbol calculated
Number average power content, which is sent to the loop filter circuit 53, is filtered processing.
When current UE is in PSS detections with the PBCH reading stages, the second processing submodule 510 receives the first rank
The result1 that section power gain control module 50 is sent is initial power yield value；
This stage, current UE would know that 5ms synchronizing information, therefore the second stage power gain control module 51 can
PSS symbols in each field, SSS character positions are determined, and then can extract and calculate PSS symbols, SSS in each field
Symbol average performance number；
By taking the TD-LTE frame that current UE is received as an example, a TD-LTE frame can be divided into the first field, the
Two fields；
The second processing submodule 510, receives the result1 sent by first stage power gain control module 50
As the first field initial power yield value, method is calculated according to result1 is substituted into prior art mean power, the is calculated
One field PSS symbols, mean power of the SSS symbols in frequency domain, the then transmission of second processing submodule 510 are calculated
Mean power is to the loop filter circuit 53, after the loop filter circuit 53 is filtered, return again to mean power to
The second processing submodule 510, it is the first field average power content p1 now to return to average power content；
The second processing submodule 510 judges that the first field average power content p1 is with first object performance number Target
It is no equal,
When p1 is equal to Target, the second field initial power yield value, the second processing submodule are used as using result1
Block 510 starts the processing to the second field；
When p1 is not equal to Target, described second, which updates output sub-module 511, updates the first field power gain control
Value result2, and result2 is output to the phase III power control module 52, specifically it is output to the 3rd processing submodule
Block 520；Using result2 as the second field initial power yield value, the second renewal output sub-module 511 notifies described the
Two processing submodules 510 enter to the processing of the second field；
Wherein, result2=result1+ (Target-p1)；
The second processing submodule 510 is received after notice (result2 is as the second field initial power yield value)
Or itself identify that (result1 is as the second field initial power yield value) needs to carry out after next field processing, start pair
Second field is handled：Second field initial power yield value is updated into prior art mean power calculating method to calculate
Second field PSS symbols, mean power of the SSS symbols in frequency domain, the then transmission of second processing submodule 510 are calculated
Mean power to the loop filter circuit 53, after the loop filter circuit 53 is filtered, return again to mean power
To the second processing submodule 510, it is the second field average power content p2 now to return to average power content；
The second processing submodule 510 judges that the second field average power content p1 is with first object performance number Target
It is no equal,
When p2 is equal to Target, using the second field initial power yield value as the 3rd field initial power yield value,
The second processing submodule 510 starts to handle the 3rd field；
When p2 is not equal to Target, described second, which updates output sub-module 511, updates the first field power gain control
Value result2, result2=p_old+ (Target-p1), and result2 is output to the phase III power gain control
Molding block 52, is specifically output to the 3rd processing submodule 520；The second renewal output sub-module 511 is notified at described second
Manage submodule 510 and enter the processing to the first field of next frame；
Wherein, when the condition establishment from " when p1 is not equal to Target " is gone to now, then p_old=result2 is taken；When
Set up and gone to now from the condition of " when p1 is equal to Target ", take p_old=result1；
According to above-mentioned technical proposal, the second processing submodule 510 receive after notice or itself recognize the need for into
After the field of row next frame first, combined with the described second renewal output sub-module 511, complete what the field of next frame first was carried out
Processing；Until having handled all fields that current UE is received.
Here, first object performance number Target is pre-set in the second stage power gain control module 51,
It is specifically located in the second processing submodule 510.
Current UE be in the downlink traffic channel reception stage in when, current UE would know that 5ms synchronizing informations, 10ms it is same
Information and frame number synchronization information are walked, therefore the phase III power gain control module 52 is capable of determining that in each subframe that RS is accorded with
Number position, and then can extract and calculate each subframe R/S symbol average power content；
By taking the TD-LTE field that current UE is received as an example, a TD-LTE field can be divided into the first son
Frame, the second subframe, the 3rd subframe, the 4th subframe, the 5th subframe；
Because the second stage power gain control module 51 works with the phase III power gain control module 52
Bandwidth there are situation about differing, so, it is described 3rd processing submodule 520 receives the second stage power gain control
After the power gain control value result2 of molding block 51, variable bandwidth processing first is done according to formula (1), then reads and has finished change
Result2_new after bandwidth processing is used as the first subframe initial power yield value；
The 3rd processing submodule 520, substitutes into prior art mean power by result2_new and calculates method, calculate
Go out mean power of the first subframe R/S symbol in frequency domain, what then the 3rd processing transmission of submodule 520 was calculated is averaged
Power is to the loop filter circuit 53, after the loop filter circuit 53 is filtered, and returns again to mean power to described
3rd processing submodule 520, it is the first subframe average power content M_p1 now to return to average power content；
Next, the 3rd processing submodule 520 judges the first subframe average power content M_p1 and the second target power
Whether value Tar is equal,
When M_p1 is equal to Tar, using result2_new as the second subframe initial power yield value, processing of institute the 3rd
Module 520 starts the processing to the second subframe；
When M_p1 is not equal to Tar, the described 3rd, which updates output sub-module 521, updates the first sub-frame power gain control value
Result3=result2_new+ (Tar-M_p1), and result3 is notified to current UE；Second field is used as using result3
Initial power yield value, the 3rd renewal output sub-module 521 notifies the 3rd processing submodule 520 to enter to the second son
Frame processing；
The 3rd processing submodule 520 is docked notified (is used as the second field initial power gain using result3
Value) or itself identify and (the second field initial power yield value is used as using result2_new) and need to carry out next subframe processing
Afterwards, start to handle the second subframe to 521 with reference to the described 3rd renewal output sub-module：
The 3rd processing submodule 520, method is calculated according to prior art mean power, calculates the second subframe RS symbols
Mean power number in frequency domain, then the 3rd processing submodule 520 send the mean power that calculates to the loop
Filter circuit 53, after the loop filter circuit 53 is filtered, returns again to mean power to the described 3rd processing submodule
520, it is the second subframe average power content M_p1 now to return to average power content；
Next, the 3rd processing submodule 520 judges the second subframe average power content M_p2 and the second target power
Whether value Tar is equal,
When M_p2 is equal to Tar, using result2_new as the 3rd subframe initial power yield value, processing of institute the 3rd
Module 520 starts to handle the 3rd subframe；
When M_p2 is not equal to Tar, the described 3rd, which updates output sub-module 521, updates the second sub-frame power gain control value
Result3=Y+ (Tar-M_p2), and result3 is notified to current UE；Described 3rd, which updates output sub-module 521, notifies institute
The 3rd processing submodule 520 is stated into the processing to the 3rd subframe；
Here, when from " M_p1 is equal to the establishment of Tar " conditions and gone to now, Y=result2_new；When from " M_p1
Set up in Tar " conditions and go to now 1, Y=result3；
According to above-mentioned technical proposal, the 3rd processing submodule 520 is received after notice, is updated and is exported with described second
Submodule 521 is combined, and completes the processing carried out to next subframe；Until having handled all subframes that current UE is received.
Here, the second target power value Tar is pre-set in phase III power gain control mould 52, is specifically located at
In the 3rd processing submodule 520；
In this stage, current UE has known the TD-LTE such as 5ms synchronizing informations, 10ms synchronizing informations and frame number synchronization information
Downlink synchronization information, in other words by downlink synchronization, the 3rd processing submodule 520 can determine each 1ms
Position of reference signal RS (Referenc Signal) symbols in respective subframe in frame, then just can be by each subframe
Middle RS is extracted.
TD-LTE terminals auto gain control method and equipment that the present invention is provided, be applicable to a width of 1.4M, 3M,
5M, 10M, 15M, 20M TD-LTE system.
The TD-LTE auto gain control methods that the present invention is provided, for the environmental quality of three phases, respectively with frame length
For unit, in units of field length, in units of subframe length, respective symbol mean power is calculated, accorded with by a frame length
The comparison of number maximum average power value and the upper limit of the power and/or the lower limit of the power, can obtain in frequency point scanning and PSS detection-phases most
Rational power gain control value；Pass through half frame length RSS symbols and the ratio of SSS Symbol averages performance number and first object performance number
Compared with, can obtain SSS detection and PBCH read stage most rational power gain control value；Pass through subframe R/S symbol mean power
The comparison of value and the second target power value, can obtain and receive stage most rational power gain control value in downlink traffic channel；
The present invention has distinguished the environmental quality of this three phases, uses different power gain control methods in each stage, improves
The flexibility of Power Control.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (11)
1. a kind of TD-LTE auto gain control methods, it is characterised in that methods described includes：
Respectively frequency point scanning and main synchronizing symbol PSS detection-phases in units of frame length, auxiliary synchronizing symbol SSS detection and physics
Broadcast channel PBCH read the stage in units of field length, downlink traffic channel receive the stage in units of subframe length, to each TD-
The mean power of respective symbol is calculated in LTE frames；Respectively by under the mean power and the upper limit of the power and/or power
Limit, first object performance number, the comparison of the second target power value, draw the power gain control value in each stage.
2. TD-LTE auto gain control methods according to claim 1, it is characterised in that in the frequency point scanning and
PSS detection-phases, methods described includes：
Each Symbol average performance number of current TD-LTE frames is calculated in units of 10ms frame lengths and maximum average power value is determined,
Maximum average power value is compared with the upper limit of the power and/or the lower limit of the power, according to comparative result, current TD-LTE frames are exported
Detected and PBCH reading stages or the processing for carrying out next TD-LTE frames in this stage power gain control value to SSS.
3. TD-LTE auto gain control methods according to claim 1, it is characterised in that in SSS detections and
PBCH reads the stage, and methods described includes：
Receiving power gain control value, calculates reference field PSS symbols, SSS symbols in units of the 5ms field length of TD-LTE frames
Average power content, the reference field PSS symbols, SSS Symbol averages performance number and the first object performance number that calculate are compared
Compared with foundation comparative result updates and exports reference field receives the stage in this stage power gain control value to downlink traffic channel
The processing of next field is carried out simultaneously or carries out the processing of next field.
4. TD-LTE auto gain control methods according to claim 1, it is characterised in that in the downlink traffic channel
In the reception stage, methods described includes：
Receiving power gain control value, in units of the 1ms subframe length of TD-LTE frames, will calculate the average work(of present sub-frame R/S symbol
Rate value, and the present sub-frame R/S symbol average power content calculated and the second target power value are compared, foundation compares knot
Fruit updates present sub-frame in this stage power gain control value and notifies to current user equipment UE or carry out the place of next subframe
Reason.
5. TD-LTE auto gain control methods according to claim 2, it is characterised in that methods described includes：
The power gain ranges that radio frequency chip is indicated are received, and power gain ranges are averagely divided into multiple subsegments, are put down
Equal power gain variable quantity；
The first frame initial power yield value that renewal current UE is received is the value of minimum gain value, is calculated using mean power
Method, calculates each Symbol average performance number in the first frame length, compares and finds out the average power content of maximum, is used as first
Frame maximum average power value；
When the first frame maximum average power value is more than the upper limit of the power, the first frame initial power yield value is updated, the second frame is used as
Initial power yield value；
When the first frame maximum average power value, which is less than the upper limit of the power, is less than the lower limit of the power simultaneously, updates the first frame initial power and increase
Benefit value, is used as the second frame initial power yield value；
When the first frame maximum average power value is simultaneously greater than the lower limit of the power less than the upper limit of the power, updates the first frame initial power and increase
Benefit value, is used as the second frame initial power yield value；
First frame maximum average power value is output to the PSS detections as the second frame power gain control value and PBCH is read
Stage；
Method is calculated using mean power, each Symbol average performance number in the second frame length is calculated, compares and finds out maximum
Average power content, as the second frame maximum average power value,
When the second frame maximum average power value is more than the upper limit of the power, the second frame initial power yield value is updated, the 3rd frame is used as
Initial power yield value；
When the second frame maximum average power value, which is less than the upper limit of the power, is less than the lower limit of the power simultaneously, updates the second frame initial power and increase
Benefit value, is used as the 3rd frame initial power yield value；
When the second frame maximum average power value is simultaneously greater than the lower limit of the power less than the upper limit of the power, updates the second frame initial power and increase
Benefit value, is used as the 3rd frame initial power yield value；
Second frame maximum average power value is output to the PSS detections as the second frame power gain control value and PBCH is read
Stage；
By that analogy, until completing all frames that UE is received.
6. TD-LTE auto gain control methods according to claim 3, it is characterised in that methods described includes：
Receive the power output controlling value sent by the frequency point scanning and PSS detection-phase present frames, and be used as present frame the
One field initial power yield value；
Method is calculated according to mean power, the first field PSS symbols, mean power of the SSS symbols in frequency domain is calculated, via
Loop filter circuit is filtered, and now average power content is used as present frame the first field average power content；
Judge whether the first field average power content is equal with first object performance number, when the first field average power content and first
When target power value is equal, into the processing of the field of present frame second；When the first field average power content and first object power
When being worth unequal, update the first field average power gain value, as reference field power gain control value, be output to it is described under
Row Traffic Channel receives the stage, while being handled into the field of present frame second；
The entrance is processed as to the field of present frame second：
Method is calculated according to mean power, the second field PSS symbols, mean power of the SSS symbols in frequency domain is calculated, via
Loop filter circuit is filtered, and now average power content is used as the second field average power content；
Judge whether the second field average power content is equal with first object performance number, when the second field average power content and first
When target power value is equal, into the processing of the field of present frame the 3rd；When the second field average power content and first object power
When being worth unequal, update the second field average power gain value, as reference field power gain control value, be output to it is described under
Row Traffic Channel receives the stage, while being handled into the field of present frame the 3rd；
By that analogy, until completing all fields that UE is received.
7. TD-LTE auto gain control methods according to claim 4, it is characterised in that methods described includes：
The downlink traffic channel receives the reference field power that stage reception is detected by the PSS and the PBCH reading stages send
Gain control value, and variable bandwidth processing is carried out to reference field power gain control value, the reference field power after processing is increased
Beneficial controlling value as reference field the first subframe initial power yield value；
Method is calculated according to mean power, mean power of the first subframe R/S symbol in frequency domain is calculated, via loop filtering
After circuit filtering, now average power content is reference field the first subframe average power content；
Compare the first subframe average power content whether equal with the second target power value, when the first subframe average power content and second
When target power value is equal, into the processing of the subframe of reference field second；When the first subframe average power content and the second target work(
When rate value is unequal, the first subframe average power gain value is updated, as present sub-frame power gain control value, is notified to current
UE；Meanwhile, into the processing of the subframe of reference field second；
The entrance is processed as to the subframe of reference field second：
Method is calculated according to mean power, mean power of the second subframe R/S symbol in frequency domain is calculated, via loop filtering
After circuit filtering, now average power content is reference field the second subframe average power content；
Compare the second subframe average power content whether equal with the second target power value, when the second subframe average power content and second
When target power value is equal, into the processing of the subframe of reference field the 3rd；When the second subframe average power content and the second target work(
When rate value is unequal, the second subframe average power gain value is updated, as present sub-frame power gain control value, is notified to current
UE；Meanwhile, into the processing of the subframe of reference field the 3rd；
By that analogy, until completing all subframes that current UE is received.
8. a kind of TD-LTE automatic gain control apparatus, it is characterised in that the equipment includes：First stage power gain control
Module, second stage power gain control module, phase III power gain control module and loop filter circuit；Wherein,
The first stage power gain control module, in units of 10ms frame lengths, calculating current TD-LTE frames, each to be accorded with
Number average power content simultaneously determines maximum average power value, and maximum average power value and the upper limit of the power and/or the lower limit of the power are carried out
Compare, draw this stage power gain control value；
The second stage power gain control module, in units of the 5ms field length of TD-LTE frames, calculating reference field
The average power content of PSS symbols, SSS symbols, and by the reference field PSS symbols calculated, the average power content of SSS symbols with
First object performance number is compared, and draws this stage power gain control value；
The phase III power gain control module, in units of the 1ms subframe length of TD-LTE frames, calculating present sub-frame
The average power content of R/S symbol, and the average power content of the present sub-frame R/S symbol calculated and the second target power value are carried out
Compare, draw this stage power gain control value；
The loop filter circuit, for second stage power gain control module and phase III power gain control mould
The average power content that block is calculated is filtered.
9. TD-LTE automatic gain control apparatus according to claim 8, it is characterised in that the first stage power increases
Beneficial control module includes：First processing submodule and first updates output sub-module；Wherein,
The first processing submodule, in units of 10ms frame lengths, calculating current each Symbol average power of TD-LTE frames
Value, and relatively more current each Symbol average performance number size of TD-LTE frames, determine present frame maximum average power value, will be current
Frame maximum average power value is compared with the upper limit of the power and/or the lower limit of the power；
Described first updates output sub-module, for according to comparative result, updating current TD-LTE frames power gain control value, makees
For next frame initial power yield value and it is sent to the first processing submodule or exports current TD-LTE frames power gain control
Value processed is used as the work(in present frame in the first stage power gain control module to the second stage power gain control module
Rate gain control value；
The first processing submodule, is additionally operable to receiving from the described first next frame initial power for updating output sub-module
After rate yield value, proceed by next frame processing.
10. TD-LTE automatic gain control apparatus according to claim 8, it is characterised in that the second stage power
Gain control module includes：Second processing submodule and second updates output sub-module；
The second processing submodule, in units of 5ms frame lengths, calculating reference field PSS symbols, SSS Symbol average work(
Rate value；And compare the reference field PSS symbols calculated, SSS Symbol averages performance number and first object performance number size；
Described second updates output sub-module, for according to comparative result, updating reference field power gain value and being output to institute
Phase III power gain control module is stated, while notifying the second processing submodule to carry out next field processing or notify
The second processing submodule carries out next field processing；
The second processing submodule, is additionally operable to receive after the described second notice for sending of renewal output sub-module, starts pair
Next field is handled.
11. TD-LTE automatic gain control apparatus according to claim 8, it is characterised in that the phase III power
Gain control module includes：3rd processing submodule and the 3rd updates output sub-module；Wherein,
The 3rd processing submodule, is calculated for calculating present sub-frame reference signal R/S symbol average power content, and comparing
Present sub-frame R/S symbol average power content and the second target power value size；
Described 3rd updates output sub-module, for according to comparative result, updating present sub-frame power gain control value, and notify
To current UE, while notifying the 3rd processing submodule to carry out next subframe processing or notifying the 3rd processing submodule
Carry out next subframe processing；
The 3rd processing submodule, is additionally operable to after the notice that reception is sent by the described 3rd renewal output sub-module, starts
Next subframe is handled.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210490955.0A CN103841633B (en) | 2012-11-27 | 2012-11-27 | A kind of TD LTE auto gain control methods and equipment |
| PCT/CN2013/085335 WO2014082504A1 (en) | 2012-11-27 | 2013-10-16 | Automatic gain control method and device in td-lte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210490955.0A CN103841633B (en) | 2012-11-27 | 2012-11-27 | A kind of TD LTE auto gain control methods and equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103841633A CN103841633A (en) | 2014-06-04 |
| CN103841633B true CN103841633B (en) | 2017-08-08 |
Family
ID=50804652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210490955.0A Active CN103841633B (en) | 2012-11-27 | 2012-11-27 | A kind of TD LTE auto gain control methods and equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103841633B (en) |
| WO (1) | WO2014082504A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106102136B (en) * | 2016-08-23 | 2019-11-05 | 成都国恒空间技术工程有限公司 | A kind of searching method of frequency division duplex mobile telecommunication system down synchronization signal |
| US10812228B2 (en) * | 2016-09-28 | 2020-10-20 | Mitsubishi Electric Corporation | Communication system using a self-contained subframe including downlink and uplink signals |
| CN108462977B (en) * | 2017-02-21 | 2020-07-31 | 深圳市中兴微电子技术有限公司 | Automatic gain control method and device |
| CN107086875B (en) * | 2017-04-11 | 2019-07-09 | 深圳思凯微电子有限公司 | Automatic gain control equipment and method |
| CN108988882B (en) * | 2017-05-31 | 2020-02-07 | 深圳市中兴微电子技术有限公司 | Automatic gain control rapid convergence method and device |
| CN107948110B (en) * | 2017-11-27 | 2020-11-17 | 南京雷行信息技术有限公司 | Automatic gain control implementation method based on synchronization in LTE system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102027674A (en) * | 2008-05-14 | 2011-04-20 | 爱立信电话股份有限公司 | Technique for controlling a gain of a receiver |
| CN102347925A (en) * | 2010-07-30 | 2012-02-08 | 富士通株式会社 | Synchronization symbol detection method and apparatus thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2378328B (en) * | 2001-08-01 | 2005-07-13 | Ipwireless Inc | AGC scheme and receiver for use in a wireless communication system |
-
2012
- 2012-11-27 CN CN201210490955.0A patent/CN103841633B/en active Active
-
2013
- 2013-10-16 WO PCT/CN2013/085335 patent/WO2014082504A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102027674A (en) * | 2008-05-14 | 2011-04-20 | 爱立信电话股份有限公司 | Technique for controlling a gain of a receiver |
| CN102347925A (en) * | 2010-07-30 | 2012-02-08 | 富士通株式会社 | Synchronization symbol detection method and apparatus thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014082504A1 (en) | 2014-06-05 |
| CN103841633A (en) | 2014-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103841633B (en) | A kind of TD LTE auto gain control methods and equipment | |
| EP3697125B1 (en) | Method and apparatus for measuring inter-frequency neighboring cell and user equipment thereof | |
| CN109803362A (en) | Poewr control method, UE, base station, method for parameter configuration and control method | |
| CN104837110B (en) | Transmission strategy implementation method based on interruption performance lifting in honeycomb D2D communication systems | |
| CN103428120A (en) | Method and apparatus for interference cancellation in long term evolution system, and method and apparatus for data sending in long term evolution system | |
| CN110710126B (en) | Communication apparatus, communication control method, and computer program | |
| CN103841597A (en) | Frequency point scanning method and device for TD-SCDMA system | |
| CN102638424A (en) | Dynamically adjusted OFDM channel estimation filtering in OFDM communications | |
| CN103281768A (en) | CRS power confirming method and equipment | |
| CN104902551A (en) | Method for transmission power shaping and communications apparatus utilizing the same | |
| CN204013544U (en) | A kind of multi-service optical fiber access indoor distributed system | |
| CN103209472B (en) | A kind of method and system for carrying out cooperative scheduling inter-cell uplink interference coordination | |
| CN102857246A (en) | Automatic gain control method and apparatus of constant envelope receiver | |
| CN109151775A (en) | D2D communication transmission mode switching method between cellular cell based on relaying | |
| CN111163524A (en) | Interference detection method, device, remote unit, access network equipment and storage medium | |
| CN103067959B (en) | Measure method and the user terminal of adjacent area | |
| CN104754614B (en) | A kind of antenna-feed parameter optimization method and device of shared antenna antenna-feeder system | |
| US20160066307A1 (en) | Mimo communication method and system | |
| US20170111130A1 (en) | Method, Device and User Terminal for Measuring Discovery Signal | |
| CN106160758A (en) | Wireless non line of sight gigabit Ethernet based on 700MHz 1100MHz variable frequency transmission system and transmission method thereof | |
| CN105991233A (en) | Wireless communication equipment and wireless communication method | |
| CN105227207B (en) | RF transceiver and its signal strength detection processing method | |
| CN202759450U (en) | Lte repeater | |
| CN103379504B (en) | A kind of distributed base station system and its method of data processing | |
| CN102307067B (en) | Multifunctional compound repeater and configuration method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221116 Address after: 518055 Zhongxing Industrial Park, Liuxian Avenue, Xili street, Nanshan District, Shenzhen City, Guangdong Province Patentee after: SANECHIPS TECHNOLOGY Co.,Ltd. Address before: 518057 Ministry of justice, Zhongxing building, South Science and technology road, Nanshan District hi tech Industrial Park, Shenzhen, Guangdong Patentee before: ZTE Corp. |