CN103517296B - A kind of frequency handover detection method, equipment and system - Google Patents
A kind of frequency handover detection method, equipment and system Download PDFInfo
- Publication number
- CN103517296B CN103517296B CN201210206474.2A CN201210206474A CN103517296B CN 103517296 B CN103517296 B CN 103517296B CN 201210206474 A CN201210206474 A CN 201210206474A CN 103517296 B CN103517296 B CN 103517296B
- Authority
- CN
- China
- Prior art keywords
- signal
- frequency
- frequency point
- center frequency
- testing equipment
- 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
Landscapes
- Mobile Radio Communication Systems (AREA)
- Transmitters (AREA)
Abstract
The invention discloses a kind of frequency handover detection method, equipment and system, its main contents includes：When reaching in each setting time cycle, determine the first center frequency point of the signal in this time cycle, and corresponding with the fixed points of the predetermined signal the second center frequency point is poor, and when the absolute value of the difference for obtaining is not less than the numerical value for setting, determine that the frequency of signal switches, whether the frequency for quickly determining signal by the side-play amount of signal frequency point shifts, especially in frequency hopping applied environment, whether switched this event by determining frequency, avoid the problem for causing predistortion dynamic tuning performance difference when signal frequency point occurs larger skew, improve predistortion dynamic tuning performance, and then improve the quality of signal.
Description
Technical field
The present invention relates to wireless communication field, more particularly to a kind of frequency handover detection method, equipment and system.
Background technology
In mobile communication system, in order to ensure a range of signal covering, usually using power amplifier（I.e.：Work(
Put）Signal to receiving is amplified treatment.Due to power amplifier itself have it is non-linear, can cause amplify after signal frequency spectrum
Broadening, which results in the interior distortion of band and monkey chatter of signal.The method of traditional solution power amplifier linearization is by retracting
Signal power is operated in the limited range of linearity making power amplifier, it is to avoid the nonlinear problem of power amplifier.
But multicarrier, broadband technology are used in existing communication system so that the peak-to-average force ratio of signal is very high, so that
So that the distortion brought by power amplifier non-linear effects and interference are more obvious.Specifically, when the peak-to-average force ratio of signal increases,
The power swing scope of signal will increase therewith so that the non-linear distortion seriousness of power amplifier increases, therefore, communication system
The nonlinear distortion question of system intermediate power amplifier is increasingly paid close attention to by people.
Obviously, treatment with higher peak than modulated signal when, power amplifier is still avoided using the method for rollback power
It is non-linear if, in order to reach specified power output, it would be desirable to select the amplifier of super high power, not only pay great number
Hardware cost, and the efficiency and the linearity of power amplifier will be unable to take into account.
Therefore, under linear exigent situation, power amplifier is that cannot meet real need completely by back-off
Want, the nonlinear problem of power amplifier is solved using digital pre-distortion technology it is critical that.
But in digital high-frequency amplification station field, signal terminates to repeater by radio frequency, and the applied environment of signal there occurs change,
Often occur that signal jumps to high frequency points or the switching situation of low frequency point is jumped to from high frequency points from low frequency point；Again due to different
Be present certain difference in frequency gain in different systems, when the frequency of signal changes, calculated when signal is without switching
The digital pre-distortion coefficient matched with current demand signal frequency for going out, switches in signal frequency point and system gain changes
When, the digital pre-distortion coefficient matched with current demand signal frequency calculated during without switching will can not meet the frequency after switching
It is required that so that the linearisation effect of power amplifier is poor, results even in intermodulation deterioration, bottom and makes an uproar and lift, and then influences digital pre-distortion skill
The dynamic property of art.
The content of the invention
A kind of frequency handover detection method, equipment and system are the embodiment of the invention provides, for how exactly to solve
Determine the problem that signal frequency point switches.
A kind of frequency handover detection method, the method includes：
When reaching in each setting time cycle, determine the first center frequency point of the signal in this time cycle, and with it is true
Corresponding second center frequency point of fixed points of the fixed signal is poor, obtains the absolute value of difference；
Whether the absolute value is judged not less than the numerical value for setting, if, it is determined that the frequency of signal switches, no
Then, determine that the frequency of signal does not switch.
A kind of frequency handover testing equipment, the equipment includes：
Determining module, for when reaching in each setting time cycle, determining first of the signal in this time cycle in
Heart frequency；
Computing module, for by corresponding second center frequency point of the fixed points of first center frequency point and the signal
Differ from, and obtain the absolute value of difference；
Judge module, for judging whether the absolute value that computing module is obtained is not less than the numerical value for setting, if, it is determined that
The frequency of signal switches, otherwise, it determines the frequency of signal does not switch.
A kind of frequency handover detecting system, the system includes the first frequency testing equipment and the second frequency testing equipment, its
In：
First frequency testing equipment, for when reaching in each setting time cycle, determining the signal in this time cycle
The first center frequency point, it is and poor with the second center frequency point that the second frequency testing equipment determines, and obtain the absolute value of difference,
And whether the absolute value is judged not less than the numerical value for setting, if, it is determined that the frequency of signal switches, otherwise, really
The frequency for determining signal does not switch；
Second frequency testing equipment, the second center frequency point of the fixed points correspondence signal for determining the signal, and
Send to the first frequency testing equipment.
The present invention has the beneficial effect that：
The embodiment of the present invention determines the first center of the signal in this time cycle when reaching in each setting time cycle
Frequency, and the second center frequency point corresponding with the fixed points of the predetermined signal is poor, and in the difference for obtaining
When absolute value is not less than the numerical value for setting, determine that the frequency of signal switches, quickly determined by the side-play amount of signal frequency point
Whether whether the frequency of signal shifts, especially in frequency hopping applied environment, switched this event by determining frequency,
The problem for causing predistortion dynamic tuning performance difference when signal frequency point occurs larger skew is avoided, predistortion dynamic is improve
Tuning performance, and then improve the quality of signal.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet of frequency handover detection method of embodiment one；
Fig. 2 is a kind of schematic flow sheet of frequency handover detection method of embodiment two；
Fig. 3 is a kind of structural representation of frequency handover testing equipment of embodiment three；
Fig. 4 is a kind of structural representation of frequency handover detecting system of example IV.
Specific embodiment
In order to realize the purpose of the present invention, the embodiment of the invention provides a kind of frequency handover detection method, equipment and be
System, when reaching in each setting time cycle, determines the first center frequency point of the signal in this time cycle, and with it is predetermined
The signal fixed points corresponding second center frequency points it is poor, and the difference for obtaining absolute value not less than setting
During numerical value, determine that the frequency of signal switches.Compared with prior art, signal is quickly determined by the side-play amount of signal frequency point
Frequency whether shift, and then the trend of work of digital pre-distortion is determined according to the frequency point information for determining, especially in frequency hopping
In applied environment, by determining whether frequency switches, it is to avoid cause predistortion when signal frequency point occurs larger skew
The problem of dynamic tuning performance difference, improves predistortion dynamic tuning performance, and then improve the quality of signal.
The scheme of embodiments of the invention is described in detail with reference to Figure of description.
Embodiment one：
As shown in figure 1, a kind of schematic flow sheet of the frequency handover detection method for the present embodiment one.The frequency handover is examined
The specific steps of survey method include：
Step 101：When reaching in each setting time cycle, the first center of signal in this time cycle is determined frequently
Point.
In this step 101, the setting time cycle refers to one section of set time T long.That is, being fixed at each
When time T is reached, the first center frequency point of the signal in T time is determined.
The time span T can according to actual needs or empirical value determine.
Step 102：The second center frequency point corresponding with the fixed points of the signal for determining is poor, obtains the exhausted of difference
To value.
In a step 102, second center frequency point can be stored local, or true after predefining
The second center frequency point determined simultaneously during fixed first center frequency point.
The fixed points of the signal refer to the collection a number of points of signal, and the sizes values of fixed points can be according to reality
Border needs or empirical value determines.
Step 103：Whether the absolute value is judged not less than the numerical value for setting, if so, performing step 104, otherwise, is performed
Step 105；
Step 104：Determine that the frequency of signal switches；
Step 105：Determine that the frequency of signal does not switch.
In step 103, when the result for judging is that the absolute value is not less than the numerical value of setting, then illustrate that signal is setting
The cycle of fixing time there occurs larger skew, determine that signal frequency point switches；When the result for judging sets as the absolute value is less than
During fixed numerical value, then illustrate that signal does not occur larger skew in the setting time cycle, determines signal frequency point in normal range (NR)
Interior switching.
The characteristics of numerical value of the setting can have linear relationship according to the actual frequency of signal with normalization frequency determines
Obtain, determine to obtain also dependent on empirical value.
By the scheme of embodiment one, the first center frequency point in the setting time cycle is determined（I.e. actual frequency）And fixation
Second center frequency point of points（Normalize frequency）, and by the exhausted of the difference between the first center frequency point and the second center frequency point
Value is compared with the numerical value of setting, according to comparative result, determines whether the frequency of signal there occurs switching, it is to avoid signal
Frequency occurs the problem of digital pre-distortion dynamic Adjustment effect difference when there is larger skew, has reached raising digital pre-distortion and has moved
State property energy, and then improve communication quality.
Embodiment two：
As shown in Fig. 2 for the present embodiment two is that frequency handover detection method provided in an embodiment of the present invention has in a device
The flow that body is implemented, the flow is comprised the following steps：
Step 201：Device power is initialized, digital signal processor（DSP）In the case where full power retracts, it is determined that working as
One section of performance number of set time T of front signal is sent to PLD as power threshold（FPGA）.
In step 201, power threshold register and normalized power register initial value be all during device power, in FPGA
It is 0.During due to judging for the first time after device power, before DSP does not issue power threshold, the corresponding power threshold deposits of FPGA
Device and normalized power register initial value are all 0, therefore, FPGA does not do signal frequency point when each setting cycle arrives yet is
The detection of no switching.
Step 202：DSP it is determined that update after pre-distortion coefficients while, calculating be currently used in renewal pre-distortion coefficients
Fixed points signal the second center frequency point.
Specifically, this step is accomplished in the following manner：
The first step：Determine the signal power value of the fixed points of the signal.
Second step：According to the signal power value of statistics, the fixed points for calculating current demand signal using below equation are right
Second center frequency point of induction signal：
Wherein, W2It is the second center frequency point, S (i) represents the current demand signal of detection, and i represents the points of signal, and N is represented and adopted
The fixed points of the current demand signal of collection, S* (i) represents the conjugated signal of S (i) signal.
3rd step：After DSP distributes lookup address table under, the corresponding normalizings of the second center frequency point write-in FPGA that will be determined
In change frequency register.
It should be noted that DSP can with real-time update digital pre-distortion coefficient, the digital pre-distortion coefficient with it is current
There is corresponding relation between second center frequency point of fixed points signal.
Step 203：FPGA counts the performance number of signal in this time cycle when reaching in each setting time cycle.
It should be noted that when it is not 0 that FPGA determines normalized frequency register, starting in each setting time cycle
During arrival, the operation of statistics performance number is performed.
Step 204：With the power threshold for receiving be compared the performance number of the signal of statistics by FPGA, is comparing knot
When being really more than the power threshold for receiving for the performance number of the signal of statistics, step 205 is performed；Otherwise perform step 203.
Step 205：FPGA calculates the signal in week this time according to the signal power value of statistics using below equation
First center frequency point of corresponding signal in phase：
Wherein, W1It is the first center frequency point, S (i) represents the current demand signal of detection, and i represents the points of signal, and N represents letter
Total points number in the fixed time period, S* (i) represents the conjugated signal of S (i) signal.
Step 206：FPGA will determine that the first center frequency point is poor with the second center frequency point for receiving, and obtains the exhausted of difference
To value.
Step 207：Whether FPGA judges the absolute value less than the numerical value for setting, if, it is determined that the frequency hair of signal
Raw switching, performs step 208；Otherwise, it determines the frequency of signal does not switch, step 209 is performed.
In step 207, digital signal processor DSP is according to the linear pass between the actual frequency of signal and normalization frequency
System determines a fixed numerical value, in the corresponding registers of numerical value write-in PLD FPGA that will be determined.
It is described to determine that a fixed numbers are the numerical value of setting, for judging whether signal frequency point switches.
Step 208：FPGA produces a trigger signal, designation number predistortion when it is determined that signal frequency point switches
Working condition is switched to BYPASS states by device DPD.
It should be noted that the BYPASS states refer to designation number predistorter waits the next pre- of DSP generations
Distortion factor.
Step 209：When it is determined that signal frequency point does not switch, designation number predistorter is produced FPGA using DSP
Pre-distortion coefficients predistortion adjustment is carried out to current signal.
By implementing two scheme, according to the linear relationship between the actual frequency of signal and normalization frequency, comparison signal
The side-play amount of frequency determines whether signal frequency point switches, especially in the frequency modulation application field of repeater, by determining signal
The method whether frequency switches, further increasing the dynamic property of digital pre-distortion, so as to improve the matter of signal
Amount.
Embodiment three：
As shown in figure 3, a kind of structural representation of the frequency handover testing equipment for the present embodiment three.The equipment includes：
Determining module 31, computing module 32 and frequency judge module 33.Wherein：
Determining module 31, for when reaching in each setting time cycle, determining first of the signal in this time cycle
Center frequency point；
Computing module 32, for by corresponding second center of the fixed points of first center frequency point and the signal frequently
Point is poor, and obtains the absolute value of difference；
Frequency judge module 33, for judging whether the absolute value that computing module is obtained is not less than the numerical value for setting, if so,
Then determine that the frequency of signal switches, otherwise, it determines the frequency of signal does not switch.
Specifically, the determining module 31, specifically for counting the signal power value in this time cycle, and according to statistics
The signal power value, the first center frequency point of corresponding signal in this time cycle is calculated using below equation：
Wherein, W1It is the first center frequency point, S (i) represents the current demand signal of detection, and i represents the points of signal, and N represents letter
Total points number in fixed time period, S* (i) represents the conjugated signal of S (i) signal.
The equipment also includes：Performance number judge module 34.Wherein,
Performance number judge module 34, for the signal power value for obtaining determining module statistics and predetermined institute
State power threshold to be compared, when comparative result is that the signal power value is more than the power threshold, triggering is calculated
Module.
The equipment also includes：Handover module 35.Wherein,
Handover module 35, for when frequency judge module 33 determines frequency handover, a trigger signal being produced, by numeral
The state of predistorter switches to BYPASS states.
Example IV：
As shown in figure 4, a kind of structural representation of the frequency handover detecting system for the present embodiment four.The system includes：
First frequency testing equipment 41 and the second frequency testing equipment 42.Wherein,
First frequency testing equipment 41, for when reaching in each setting time cycle, determining the letter in this time cycle
Number the first center frequency point, it is and poor with the second center frequency point that the second frequency testing equipment determines, and obtain the absolute of difference
Value, and whether the absolute value is judged not less than the numerical value for setting, if, it is determined that the frequency of signal switches, otherwise,
Determine that the frequency of signal does not switch.
Second frequency testing equipment 42, the second center frequency point of the fixed points correspondence signal for determining the signal,
And send to the first frequency testing equipment 41.
Specifically, the second frequency testing equipment 42, the signal work(of the fixed points specifically for determining the signal
Rate value, and according to the signal power value of statistics, the fixed points correspondence signal of current demand signal is calculated using below equation
Second center frequency point, and it is sent to the first frequency testing equipment：
Wherein, W2It is the second center frequency point, S (i) represents the current demand signal of detection, and i represents the points of signal, and N is represented and adopted
The fixed points of the current demand signal of collection, S* (i) represents the conjugated signal of S (i) signal.
The second frequency testing equipment 42, is additionally operable to determine the power threshold of signal, and be sent to the inspection of the first frequency
Measurement equipment 41；
The first frequency testing equipment 41, is additionally operable to count the signal power value and the detection of the second frequency for obtaining
The power threshold that equipment sends is compared, and is that the signal power value is more than the power threshold in comparative result
When, it is poor with the second center frequency point that the second testing equipment determines, and the absolute value of difference is obtained, and judge the absolute value
Whether not less than the numerical value for setting, if, it is determined that the frequency of signal switches, otherwise, it determines the frequency of signal is not sent out
Raw switching.
It should be noted that the first frequency testing equipment 41 is realized by PLD FPGA；Described second
Frequency testing equipment 42 is realized by digital signal processor DSP.
Obviously, those skilled in the art can carry out various changes and modification without deviating from essence of the invention to the present invention
God and scope.So, if these modifications of the invention and modification belong to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising these changes and modification.
Claims (7)
1. a kind of frequency handover detection method, it is characterised in that the method includes：
When reaching in each setting time cycle, determine the first center frequency point of the signal in this time cycle, and with determine
Corresponding second center frequency point of fixed points of the signal is poor, obtains the absolute value of difference；
Whether the absolute value is judged not less than the numerical value for setting, if, it is determined that the frequency of signal switches, otherwise, really
The frequency for determining signal does not switch；
It is determined that during frequency handover, produce a trigger signal, the state of digital predistorter DPD is switched into BYPASS shapes
State；
Wherein it is determined that the first center frequency point of the signal in this time cycle, specifically includes：
Count the signal power value in this time cycle；
According to the signal power value of statistics, the signal corresponding signal within this time cycle is calculated using below equation
First center frequency point：
Wherein, W1It is the first center frequency point, S (i) represents the current demand signal of detection, and i represents the points of signal, and N represents signal at this
Total points in fixed time period, S* (i) represents the conjugated signal of S (i) signal；
Wherein, the second center frequency point of the fixed points correspondence signal of the signal, is predefined by following manner：
Determine the signal power value of the fixed points of the signal；
According to the signal power value of statistics, the second of the fixed points correspondence signal of current demand signal is calculated using below equation
Center frequency point, and send：
Wherein, W2It is the second center frequency point, S (i) represents the current demand signal of detection, and i represents the points of signal, and N represents working as collection
The fixed points of front signal, S* (i) represents the conjugated signal of S (i) signal.
2. the method for claim 1, it is characterised in that the second center frequency point corresponding with the fixed points of the signal
Before making difference, methods described also includes：
The signal power value for obtaining will be counted to be compared with predetermined power threshold；
When comparative result is that the signal power value is more than the power threshold, it is right with the fixed points of the signal to perform
The second center frequency point answered makees the step of difference.
3. a kind of frequency handover testing equipment, it is characterised in that the equipment includes：
Determining module, for when reaching in each setting time cycle, determine the signal in this time cycle the first center frequently
Point；
Computing module, for first center frequency point the second center frequency point corresponding with the fixed points of the signal to be made
Difference, and obtain the absolute value of difference；
Frequency judge module, for judging whether the absolute value that computing module is obtained is not less than the numerical value for setting, if, it is determined that
The frequency of signal switches, otherwise, it determines the frequency of signal does not switch；
Handover module, for it is determined that during frequency handover, produce a trigger signal, the state of digital predistorter being switched to
BYPASS states；
Wherein, the determining module, specifically for counting the signal power value in this time cycle, and according to the letter of statistics
Number performance number, the first center frequency point of corresponding signal in this time cycle is calculated using below equation：
Wherein, W1It is the first center frequency point, S (i) represents the current demand signal of detection, and i represents the points of signal, and N represents signal solid
The total points fixed time in the cycle, S* (i) represents the conjugated signal of S (i) signal.
4. equipment as claimed in claim 3, it is characterised in that the equipment also includes：
Performance number judge module, for the signal power value for obtaining determining module statistics and the predetermined power
Threshold value is compared, and when comparative result is that the signal power value is more than the power threshold, triggers computing module.
5. a kind of frequency handover detecting system, it is characterised in that the system includes that the first frequency testing equipment and the second frequency are examined
Measurement equipment, wherein：
First frequency testing equipment, for when reaching in each setting time cycle, determining the signal in this time cycle
One center frequency point, and it is poor with the second center frequency point that the second testing equipment determines, and the absolute value of difference is obtained, and judge
Whether the absolute value is not less than the numerical value of setting, if, it is determined that the frequency of signal switches, otherwise, it determines signal
Frequency does not switch；It is determined that during frequency handover, produce a trigger signal, the state of digital predistorter is switched to
BYPASS states；
Second frequency testing equipment, the second center frequency point of the fixed points correspondence signal for determining the signal, and send
To the first frequency testing equipment；
Wherein, the second frequency testing equipment, the signal power value of the fixed points specifically for determining the signal, and root
The signal power value according to statistics, second center of fixed points correspondence signal of current demand signal is calculated using below equation frequently
Point, and it is sent to the first frequency testing equipment：
Wherein, W2It is the second center frequency point, S (i) represents the current demand signal of detection, and i represents the points of signal, and N represents working as collection
The fixed points of front signal, S* (i) represents the conjugated signal of S (i) signal.
6. system as claimed in claim 5, it is characterised in that
The second frequency testing equipment, is additionally operable to determine the power threshold of signal, and be sent to the first frequency testing equipment；
The first frequency testing equipment, is additionally operable to count the signal power value and the second frequency testing equipment hair for obtaining
The power threshold sent is compared, and when comparative result is that the signal power value is more than the power threshold, with
Whether the second center frequency point that second testing equipment determines is poor, and obtains the absolute value of difference, and judges the absolute value
Not less than the numerical value of setting, if, it is determined that the frequency of signal switches, otherwise, it determines the frequency of signal is not cut
Change.
7. system as claimed in claim 6, it is characterised in that
The first frequency testing equipment is realized by PLD FPGA；
The second frequency testing equipment is realized by digital signal processor DSP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210206474.2A CN103517296B (en) | 2012-06-20 | 2012-06-20 | A kind of frequency handover detection method, equipment and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210206474.2A CN103517296B (en) | 2012-06-20 | 2012-06-20 | A kind of frequency handover detection method, equipment and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103517296A CN103517296A (en) | 2014-01-15 |
| CN103517296B true CN103517296B (en) | 2017-07-11 |
Family
ID=49899141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210206474.2A Active CN103517296B (en) | 2012-06-20 | 2012-06-20 | A kind of frequency handover detection method, equipment and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103517296B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108847868B (en) * | 2017-05-04 | 2019-11-05 | 展讯通信（上海）有限公司 | AFH update method and device |
| CN117294372B (en) * | 2023-11-23 | 2024-02-09 | 上海芯袖微电子科技有限公司 | Frequency conversion control method, device and system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201956974U (en) * | 2010-12-30 | 2011-08-31 | 芯通科技（成都）有限公司 | Radio-frequency-in and radio-frequency-out DPD (Deep Power Down) power amplification system with signal adaptivity |
| CN102376289A (en) * | 2010-08-06 | 2012-03-14 | 晨星软件研发(深圳)有限公司 | Display time sequence control circuit and method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012034134A (en) * | 2010-07-29 | 2012-02-16 | Sumitomo Electric Device Innovations Inc | Amplifier |
| CN102333389A (en) * | 2011-10-11 | 2012-01-25 | 上海欣民通信技术有限公司 | Three-mode digital optical fiber remote system |
-
2012
- 2012-06-20 CN CN201210206474.2A patent/CN103517296B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102376289A (en) * | 2010-08-06 | 2012-03-14 | 晨星软件研发(深圳)有限公司 | Display time sequence control circuit and method thereof |
| CN201956974U (en) * | 2010-12-30 | 2011-08-31 | 芯通科技（成都）有限公司 | Radio-frequency-in and radio-frequency-out DPD (Deep Power Down) power amplification system with signal adaptivity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103517296A (en) | 2014-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2947833B1 (en) | Digital predistortion processing method and system | |
| US9077299B2 (en) | Pre-distortion for fast power transient waveforms | |
| CN102801392B (en) | Radio frequency power amplification device | |
| EP2438678B1 (en) | Apparatus and method for predictive over-drive detection | |
| CN103888085B (en) | Method of calibrating an envelope tracking system, power voltage modulation method and apparatus thereof | |
| US8994450B2 (en) | Doherty power amplifier, and method and device for improving power amplification efficiency of Doherty power amplifier | |
| JP2008295089A (en) | Distortion compensating amplifier apparatus | |
| CN107579716B (en) | Linear power amplifier based on analog cancellation | |
| JP2016500221A5 (en) | ||
| CN103296978B (en) | A kind of digital pre-distortion method and device | |
| CN103517296B (en) | A kind of frequency handover detection method, equipment and system | |
| WO2015176645A2 (en) | Phase-modulated load apparatus and method | |
| WO2020239043A1 (en) | Signal processing method and apparatus, and storage medium | |
| CN111049480A (en) | Method and device for improving linear efficiency of Doherty power amplifier | |
| CN102904846A (en) | Digital pre-distortion processing method adaptive to quick-change signal | |
| Farabegoli et al. | Advanced transmitters with combined crest factor reduction and digital predistortion techniques | |
| KR102048235B1 (en) | Apparatus and method for digital pre-distortion in a wireless communication system | |
| CN104270330B (en) | A kind of collecting method in digital pre-distortion system | |
| EP2834914B1 (en) | Dynamic characterisation of amplifier using multiple envelope shaping functions | |
| WO2007087108A2 (en) | Wireless communication unit and method of characterizing a power amplifier | |
| Zhang et al. | Design of a memory polynomial predistorter for wideband envelope tracking amplifiers | |
| CN201213254Y (en) | Transmission power detection circuit and mobile communication terminal | |
| WO2013097360A1 (en) | Abnormal protection method and apparatus of a power amplifier | |
| Bräckle et al. | An 8 W GaAs Class-AB amplifier for operation in envelope tracking systems | |
| JP2002026665A (en) | Distortion compensation device and distortion compensation method |
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 |
Effective date of registration: 20180301 Address after: 510663 Shenzhou Road, Guangzhou Science City, Guangzhou, Guangzhou economic and Technological Development Zone, Guangdong Province, No. 10 Co-patentee after: Comba Telecom Systems (Guangzhou) Co., Ltd. Patentee after: Comba Telecom System (China) Co., Ltd. Co-patentee after: Jingxin Communication Technology (Guangzhou) Co., Ltd. Co-patentee after: TIANJIN COMBA TELECOM SYSTEMS CO., LTD. Address before: 510663 Guangdong city of Guangzhou Province Economic and Technological Development Zone Jinbi Road No. 6 Patentee before: Jingxin Communication Technology (Guangzhou) Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200103 Address after: 510663 No. 10, Shenzhou Road, Science City, Guangzhou, economic and Technological Development Zone, Huangpu District, Guangzhou, Guangdong Province Patentee after: Jingxin Communication System (China) Co., Ltd. Address before: 510663 Shenzhou Road, Guangzhou Science City, Guangzhou, Guangzhou economic and Technological Development Zone, Guangdong Province, No. 10 Co-patentee before: Jingxin Communication System (Guangzhou) Co., Ltd. Patentee before: Jingxin Communication System (China) Co., Ltd. Co-patentee before: Jingxin Communication Technology (Guangzhou) Co., Ltd. Co-patentee before: TIANJIN COMBA TELECOM SYSTEMS CO., LTD. |
|
| TR01 | Transfer of patent right | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 No.10, Shenzhou Road, Guangzhou Science City, economic and Technological Development Zone, Huangpu District, Guangzhou City, Guangdong Province Patentee after: Jingxin Network System Co.,Ltd. Address before: 510663 No.10, Shenzhou Road, Guangzhou Science City, economic and Technological Development Zone, Huangpu District, Guangzhou City, Guangdong Province Patentee before: Comba Telecom System (China) Ltd. |
|
| CP01 | Change in the name or title of a patent holder |