CN102065040A - Adjustment method of terminal frequency offset, terminal and TDD (Time Division Duplexing) system - Google Patents
Adjustment method of terminal frequency offset, terminal and TDD (Time Division Duplexing) system Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention provides an adjustment method of a terminal frequency offset, a terminal and a TDD (Time Division Duplexing) system, relating to the field of mobile communication, and aims to solve the technical problem that the demodulation performance of a paging message can be affected when the terminal uses a DCXO (Digitally Compensated Crystal Oscillator) to generate a system reference clock. The terminal comprises the DCXO used for generating the reference clock; and the method comprises for the following steps of: 1, performing a first frequency offset compensation on a radio frequency of the terminal according to the difference between a second temperature of the DCXO after the terminal is awaken and a first temperature of the DCXO before the terminal is in dormancy; and 2, receiving service data and demodulating the service data at the radio frequency after the first frequency offset compensation. By virtue of the terminal and the method, the demodulation performance of the paging information when the terminal uses the DCXO to generate the system reference clock can be improved.
Description
Technical field
The present invention relates to moving communicating field, be meant a kind of method of adjustment, terminal and TDD system of frequency deviation of terminal especially.
Background technology
In the clock interface circuit, the transceiver that a large amount of mobile phones bring into use the transceiver that comprises voltage controlled crystal oscillator (VCXO) or use to comprise digital control crystal oscillator.Because the cost of DCXO is lower, volume is littler, so use DCXO (digital temperature compensation oscillator) to produce the reference clock of system in the Terminal Design.Because DCXO does not have the function of automatic regulating frequency,, can influence the demodulation performance of paging information if therefore untimely frequency deviation is compensated and adjusts.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method of adjustment, terminal and TDD system of frequency deviation of terminal, can improve and use DCXO to produce the demodulation performance of the terminal of system's reference clock to paging information.
For solving the problems of the technologies described above, embodiments of the invention provide technical scheme as follows:
On the one hand, provide a kind of method of adjustment of frequency deviation of terminal, described terminal comprises: be used to produce the digital temperature compensation oscillator DCXO of reference clock, described method comprises:
Step 1, according to described DCXO in first temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation of the rf frequency of described terminal;
Step 2 under the rf frequency behind described first compensate of frequency deviation, receives business datum, and described business datum is carried out demodulation.
Described step 1 is specially: wake up in the moment that shifts to an earlier date the predetermined quantity subframe than scheduling wake-up constantly, and according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation;
After the described step 1, before the described step 2, described method also comprises:
Steps A 1 under the rf frequency behind described first compensate of frequency deviation, is obtained the second compensate of frequency deviation value;
Steps A 2 according to the described second compensate of frequency deviation value, is carried out second compensate of frequency deviation of the rf frequency of described terminal;
Described step 2 is specially: under the rf frequency behind described second compensate of frequency deviation, receive business datum, and described business datum is carried out demodulation.
Described steps A 1 is specially: in the current subframe behind described terminal wake-up, under the rf frequency behind described first compensate of frequency deviation, the data of receiving slot 0 are obtained the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0.
Described method also comprises:
Step 3 is obtained the 3rd compensate of frequency deviation value;
Step 4 according to described the 3rd compensate of frequency deviation value, is carried out the 3rd compensate of frequency deviation to the described business datum of demodulation.
Described step 1 comprises:
Step B1 before described terminal sleeping, measures first temperature of DCXO in the described terminal;
Step B2 after described terminal is waken up, measures second temperature of the DCXO of described terminal;
Step B3 searches first frequency deviation value of the described first temperature correspondence and second frequency deviation value of the described second temperature correspondence respectively;
Step B4 according to the frequency of the working frequency range of the center frequency point of the working frequency range of described first frequency deviation value and described second frequency deviation value, described terminal and the described terminal adjustment slope that shakes, obtains the first compensate of frequency deviation value;
Step B5 according to the described first compensate of frequency deviation value, carries out first compensate of frequency deviation.
Described step B4 adopts following formula to calculate:
N=-Δ f*M*FOE_Step, wherein, n is the described first compensate of frequency deviation value, Δ f is the difference between described second frequency deviation value and described first frequency deviation value; M is the center frequency point of the working frequency range of described terminal, and FOE_Step is the frequency of the working frequency range of the described terminal adjustment slope that shakes.
The value of the predetermined quantity of described subframe is determined according to the frequency deviation value of the demodulation tolerance of the TDD system at the precision of the temperature-compensating frequency deviation of described DCXO and described terminal place.
On the other hand, provide a kind of terminal, comprising: be used to produce the digital temperature compensation oscillator DCXO of reference clock, it is characterized in that, also comprise:
First frequency offset compensation element, according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation of the rf frequency of described terminal;
Demodulating unit under the rf frequency behind described first compensate of frequency deviation, receives business datum, and described business datum is carried out demodulation.
Described terminal also comprises:
The second compensate of frequency deviation value acquiring unit, in the current subframe behind described terminal wake-up, under the rf frequency behind described first compensate of frequency deviation, the data of receiving slot 0 are obtained the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0;
Second frequency offset compensation element is carried out second compensate of frequency deviation of the rf frequency of described terminal according to the described second compensate of frequency deviation value;
Described first frequency offset compensation element is specially: wake up in the moment that shifts to an earlier date the predetermined quantity subframe than scheduling wake-up constantly, and according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation;
Described demodulating unit is specially: under the rf frequency behind described second compensate of frequency deviation, receive business datum, and described business datum is carried out demodulation.
Described terminal also comprises:
The 3rd compensate of frequency deviation value acquiring unit obtains the 3rd compensate of frequency deviation value;
The 3rd frequency offset compensation element according to described the 3rd compensate of frequency deviation value, is carried out the 3rd compensate of frequency deviation to the described business datum of demodulation.
Described first frequency offset compensation element comprises:
The first temperature survey subelement before described terminal sleeping, is measured first temperature of DCXO in the described terminal;
The second temperature survey subelement after described terminal is waken up, is measured second temperature of the DCXO of described terminal;
Search subelement, search first frequency deviation value of the described first temperature correspondence and second frequency deviation value of the described second temperature correspondence respectively;
The first compensate of frequency deviation value is obtained subelement, according to the frequency of the working frequency range of the center frequency point of the working frequency range of described first frequency deviation value and described second frequency deviation value, described terminal and the described terminal adjustment slope that shakes, obtains the first compensate of frequency deviation value;
The first compensate of frequency deviation subelement according to the described first compensate of frequency deviation value, carries out first compensate of frequency deviation.
On the other hand, provide a kind of TDD system, described TDD system comprises terminal, and described terminal comprises: be used to produce the digital temperature compensation oscillator DCXO of reference clock, it is characterized in that described terminal also comprises:
First frequency offset compensation element, according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation of the rf frequency of described terminal;
Demodulating unit under the rf frequency behind described first compensate of frequency deviation, receives business datum, and described business datum is carried out demodulation.
Embodiments of the invention have following beneficial effect:
In the such scheme, terminal according to DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation of the rf frequency of described terminal, can in time compensate and adjust frequency deviation, improve the demodulation performance of paging information.
Description of drawings
Fig. 1 is the schematic flow sheet of an embodiment of method of adjustment of the frequency deviation of terminal of the present invention;
Fig. 2 is the schematic flow sheet of another embodiment of method of adjustment of the frequency deviation of terminal of the present invention;
Fig. 3 is the structural representation of terminal of the present invention;
Fig. 4 is the schematic flow sheet of application scenarios of method of adjustment of the frequency deviation of terminal of the present invention.
Embodiment
For technical problem, technical scheme and advantage that embodiments of the invention will be solved is clearer, be described in detail below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, be the method for adjustment of the frequency deviation of a kind of terminal of the present invention, described terminal comprises: be used to produce the digital temperature compensation oscillator DCXO of reference clock, described method comprises:
In the such scheme, can in time compensate and adjust, improve the demodulation performance of paging information frequency deviation.
As shown in Figure 2, be the method for adjustment of the frequency deviation of a kind of terminal of the present invention, described terminal comprises: be used to produce the digital temperature compensation oscillator DCXO of reference clock, described method comprises:
Step 22 under the rf frequency behind described first compensate of frequency deviation, is obtained the second compensate of frequency deviation value; Be specially: in the current subframe behind described terminal wake-up, under the rf frequency behind described first compensate of frequency deviation, the data of receiving slot 0 are obtained the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0.
Described step 21 comprises:
At first, before described terminal sleeping, measure first temperature of DCXO in the described terminal;
Then, after described terminal is waken up, measure second temperature of the DCXO of described terminal;
Then, search first frequency deviation value of the described first temperature correspondence and second frequency deviation value of the described second temperature correspondence respectively;
Then, according to the frequency of the working frequency range of the center frequency point of the working frequency range of described first frequency deviation value and described second frequency deviation value, described terminal and the described terminal adjustment slope that shakes, obtain the first compensate of frequency deviation value; Wherein, adopt following formula to calculate: n=one Δ f*M*FOE_Step, wherein, n is the described first compensate of frequency deviation value, Δ f is the difference between described second frequency deviation value and described first frequency deviation value; M is the center frequency point of the working frequency range of described terminal, and FOE_Step is the frequency of the working frequency range of the described terminal adjustment slope that shakes.
Then, according to the described first compensate of frequency deviation value, carry out first compensate of frequency deviation.
As shown in Figure 3, be a kind of terminal of the present invention, comprise: be used to produce the digital temperature compensation oscillator DCXO of reference clock, also comprise:
First frequency offset compensation element 31, according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation of the rf frequency of described terminal;
Described terminal also comprises:
The second compensate of frequency deviation value acquiring unit 33, in the current subframe behind described terminal wake-up, under the rf frequency behind described first compensate of frequency deviation, the data of receiving slot 0 are obtained the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0;
Second frequency offset compensation element 34 is carried out second compensate of frequency deviation of the rf frequency of described terminal according to the described second compensate of frequency deviation value;
Described first frequency offset compensation element 31 is specially: wake up in the moment that shifts to an earlier date the predetermined quantity subframe than scheduling wake-up constantly, and according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation;
Described demodulating unit 32 is specially: under the rf frequency behind described second compensate of frequency deviation, receive business datum, and described business datum is carried out demodulation.
Described terminal also comprises:
The 3rd compensate of frequency deviation value acquiring unit 35 obtains the 3rd compensate of frequency deviation value;
The 3rd frequency offset compensation element 36 according to described the 3rd compensate of frequency deviation value, is carried out the 3rd compensate of frequency deviation to the described business datum of demodulation.
Described first frequency offset compensation element 31 comprises:
The first temperature survey subelement before described terminal sleeping, is measured first temperature of DCXO in the described terminal;
The second temperature survey subelement after described terminal is waken up, is measured second temperature of the DCXO of described terminal;
Search subelement, search first frequency deviation value of the described first temperature correspondence and second frequency deviation value of the described second temperature correspondence respectively;
The first compensate of frequency deviation value is obtained subelement, according to the frequency of the working frequency range of the center frequency point of the working frequency range of described first frequency deviation value and described second frequency deviation value, described terminal and the described terminal adjustment slope that shakes, obtains the first compensate of frequency deviation value;
The first compensate of frequency deviation subelement according to the described first compensate of frequency deviation value, carries out first compensate of frequency deviation.
On the other hand, provide a kind of TDD system, described TDD system comprises terminal, and described terminal comprises: be used to produce the digital temperature compensation oscillator DCXO of reference clock, described terminal also comprises:
First frequency offset compensation element, according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation of the rf frequency of described terminal;
Demodulating unit under the rf frequency behind described first compensate of frequency deviation, receives business datum, and described business datum is carried out demodulation.
As shown in Figure 4, when adopting DCXO for TD-SCDMA system shown in the present, the application scenarios of the frequency deviation processing method under the idle condition.The invention is not restricted to the TD-SCDMA system, can be used for other TDD (Time Division Duplexing, time division duplex) system.Should be with in the scene, terminal adopts the transceiver of DCXO, and terminal utilizes DCXO (digital compensation crystal oscillator) to produce system's reference clock,, be operated in the frequency range of 2010-2025M.When being in idle pulley, the workflow of this implementation method is as follows: comprising:
Step 1: terminal all shifts to an earlier date n subframe and wakes up when each sleep, when each sleep was waken up, SC (system controller) dispatched temperature survey, and carries out compensate of frequency deviation according to variations in temperature, this compensate of frequency deviation is finished before radio frequency is started working, and guarantees that frequency has reached stable status; Wherein, the n value depends on the precision of temperature-compensating frequency deviation and the frequency deviation of TDD system demodulation tolerance, recommended range n={0,1,2,3,4}.When n is 0, carry out step 2.
Specifically, at first, before each sleep, terminal is carried out a temperature survey at least to system clock, and last temperature value is T before the preservation sleep
1
Then, in given sleep cycle, a terminal subframe is in advance waken up.At first SC dispatching patcher clock carries out temperature survey, and the record temperature value is T
2
Then, tabling look-up according to temperature value obtains the related offset value, and this table provides and is kept in the terminal read-only storage by chip manufacturer.If temperature T
1Corresponding frequency deviation value is f (T
1) ppm, temperature T
2Corresponding frequency deviation value is f (T
2) ppm.Then temperature variant frequency deviation is in this sleep cycle: Δ t=f (T
2)-f (T
1).
Then, frequency deviation is transformed Hz from ppm, be specially: F (Hz)=Δ f*2017.4 according to the center frequency point (2017.4MHz) of working frequency range.
Then, adjusting frequency deviation control word that slope FOE_Step obtains this time adjusting according to the frequency deviation of this working frequency range is: n=-F (Hz) * FOE_Step.Wherein, frequency deviation adjustment slope FOE_Step obtains behind starting up of terminal.
Then, system controller affacts adjustment amount n the adjustment of rf frequency by simulation or digital form.
Step 2: after finishing temperature-compensating, terminal is in the subframe of n the rule of waking up, begin to receive the data of TS0, utilize the P-CCPCH channel to carry out frequency offset estimating, and in current subframe, the frequency deviation of estimating is fed back to system controller control rf frequency, with the residual frequency deviation in further compensation temperature compensation back.
Draw according to crystal property and big quantity research, the still residual frequency deviation that is 800Hz to the maximum after the temperature-compensating frequency deviation, and emulation points out that the frequency deviation of the BCH of TD-SCDMA system (broadcast channel)/PICH (Page Indication Channel)/PCH (paging channel) demodulation is restricted to 200Hz.Therefore, the demodulation performance of the BCH/PICH/PCH that wakes up in order to guarantee to sleep needs to wake up so shift to an earlier date n subframe in demodulation advance line frequency inclined to one side estimation and compensation.If residual frequency deviation is less and in the scope that the terminal demodulation allows after the temperature-compensating, then need not wake up in advance.
This frequency offset estimating is utilized P-CCPCH (Primary Common Control Physical Channel) data of TS0 (time slot 0), and P-CCPCH adopts QPSK (quarternary phase-shift keying (QPSK)) modulation.And can adopt multiple algorithm based on the frequency offset estimating of QPSK modulation, illustrate as follows:
According to the TD-SCDMA structure of time slot, the symbol of supposing to be positioned at after the demodulation P-CCPCH of Mid-amble sign indicating number (intermediate code) front is r
1(i), the symbol that is positioned at the P-CCPCH of Mid-amble sign indicating number back is r
2(i).The symbol of declaring firmly that obtains based on demodulation symbol is respectively
With
Order
The conjugation of conj (x) expression x.With symbol conjugate multiplication before and after the Mid-amble:
N be before the Mid-amble or after symbol numbers.Because P-CCPCH is mapped to two physical code channels, two code channels can be added up:
Obtaining frequency deviation value at last is:
Wherein
Be plural number
Phase place, Q is a spreading factor, T
cBe spreading rate.。
The frequency deviation value of estimating when frame should feed back to SC when frame, and SC is by simulation or digital mode control rf frequency.
Step 3: terminal begins to receive data and carries out corresponding demodulation, in order further to overcome the influence of frequency deviation, needs to utilize the frequency deviation value that estimates when frame that demodulated data is carried out compensate of frequency deviation in demodulating process.
Need after terminal sleep is waken up to suppose to monitor broadcasting, therefore after carrying out compensate of frequency deviation, terminal begins to receive the data of TS0 and carries out the demodulation of BCH.P-CCPCH symbol to demodulation carries out frequency offset estimating, and the frequency deviation estimating method described in this method and the step 2 is similar, repeats no more here.
Suppose that the frequency deviation value that estimates is f
MeasuredThe compensation method that the frequency deviation that utilization estimates compensates demodulated symbols has multiple.With a kind of method wherein is example: the offset of preceding m the data of Mid-amble is
The offset of m data is behind the Mid-amble
Data after the compensation are at last: r
1(i)=r (i) * e^ (j*f
Comp).Wherein, r
1(i) be the data after the compensation, r (i) is the preceding data of compensation, and e is a constant.Then, the operation such as decode of the data after the terminal utilization compensation.
Among the present invention, when terminal is in idle condition, in each DRX (Discontinuous Reception, discontinuous reception) cycle paging receiving information of waking up.And, may bring bigger frequency deviation in each DRX cycle variation of temperature, the frequency offset regulation method of DCXO under a kind of idle pulley has been proposed, according to temperature frequency deviation is adjusted earlier, carry out frequency offset estimating and adjustment according to the data of the TS0 that receives again, guaranteed the demodulation performance of each DRX cycle paging information.
Described method embodiment is corresponding with described device embodiment, the description of relevant portion gets final product among the part comparable device embodiment that does not describe in detail in method embodiment, and the description of relevant portion gets final product among the part reference method embodiment that does not describe in detail in device embodiment.
One of ordinary skill in the art will appreciate that, realize that all or part of step in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program is when carrying out, comprise step as above-mentioned method embodiment, described storage medium, as: magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
In each method embodiment of the present invention; the sequence number of described each step can not be used to limit the sequencing of each step; for those of ordinary skills, under the prerequisite of not paying creative work, the priority of each step is changed also within protection scope of the present invention.
The above is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. the method for adjustment of the frequency deviation of a terminal, described terminal comprises: be used to produce the digital temperature compensation oscillator DCXO of reference clock, it is characterized in that described method comprises:
Step 1, according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation of the rf frequency of described terminal;
Step 2 under the rf frequency behind described first compensate of frequency deviation, receives business datum, and described business datum is carried out demodulation.
2. the method for adjustment of the frequency deviation of terminal according to claim 1 is characterized in that,
Described step 1 is specially: wake up in the moment that shifts to an earlier date the predetermined quantity subframe than scheduling wake-up constantly, and according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation;
After the described step 1, before the described step 2, described method also comprises:
Steps A 1 under the rf frequency behind described first compensate of frequency deviation, is obtained the second compensate of frequency deviation value;
Steps A 2 according to the described second compensate of frequency deviation value, is carried out second compensate of frequency deviation of the rf frequency of described terminal;
Described step 2 is specially: under the rf frequency behind described second compensate of frequency deviation, receive business datum, and described business datum is carried out demodulation.
3. the method for adjustment of the frequency deviation of terminal according to claim 2, it is characterized in that, described steps A 1 is specially: in the current subframe behind described terminal wake-up, under the rf frequency behind described first compensate of frequency deviation, the data of receiving slot 0 are obtained the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0.
4. the method for adjustment of the frequency deviation of terminal according to claim 1 is characterized in that, described method also comprises:
Step 3 is obtained the 3rd compensate of frequency deviation value;
Step 4 according to described the 3rd compensate of frequency deviation value, is carried out the 3rd compensate of frequency deviation to the described business datum of demodulation.
5. the method for adjustment of the frequency deviation of terminal according to claim 1 is characterized in that, described step 1 comprises:
Step B1 before described terminal sleeping, measures first temperature of DCXO in the described terminal;
Step B2 after described terminal is waken up, measures second temperature of the DCXO of described terminal;
Step B3 searches first frequency deviation value of the described first temperature correspondence and second frequency deviation value of the described second temperature correspondence respectively;
Step B4 according to the frequency of the working frequency range of the center frequency point of the working frequency range of described first frequency deviation value and described second frequency deviation value, described terminal and the described terminal adjustment slope that shakes, obtains the first compensate of frequency deviation value;
Step B5 according to the described first compensate of frequency deviation value, carries out first compensate of frequency deviation.
6. the method for adjustment of the frequency deviation of terminal according to claim 5 is characterized in that, described step B4 adopts following formula to calculate:
N=-Δ f*M*FOE_Step, wherein, n is the described first compensate of frequency deviation value, Δ f is the difference between described second frequency deviation value and described first frequency deviation value; M is the center frequency point of the working frequency range of described terminal, and FOE_Step is the frequency of the working frequency range of the described terminal adjustment slope that shakes.
7. the method for adjustment of the frequency deviation of terminal according to claim 2 is characterized in that,
The value of the predetermined quantity of described subframe is determined according to the frequency deviation value of the demodulation tolerance of the TDD system at the precision of the temperature-compensating frequency deviation of described DCXO and described terminal place.
8. terminal comprises: be used to produce the digital temperature compensation oscillator DCXO of reference clock, it is characterized in that, also comprise:
First frequency offset compensation element, according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation of the rf frequency of described terminal;
Demodulating unit under the rf frequency behind described first compensate of frequency deviation, receives business datum, and described business datum is carried out demodulation.
9. terminal according to claim 8 is characterized in that, also comprises:
The second compensate of frequency deviation value acquiring unit, in the current subframe behind described terminal wake-up, under the rf frequency behind described first compensate of frequency deviation, the data of receiving slot 0 are obtained the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0;
Second frequency offset compensation element is carried out second compensate of frequency deviation of the rf frequency of described terminal according to the described second compensate of frequency deviation value;
Described first frequency offset compensation element is specially: wake up in the moment that shifts to an earlier date the predetermined quantity subframe than scheduling wake-up constantly, and according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation;
Described demodulating unit is specially: under the rf frequency behind described second compensate of frequency deviation, receive business datum, and described business datum is carried out demodulation.
10. terminal according to claim 8 is characterized in that, also comprises:
The 3rd compensate of frequency deviation value acquiring unit obtains the 3rd compensate of frequency deviation value;
The 3rd frequency offset compensation element according to described the 3rd compensate of frequency deviation value, is carried out the 3rd compensate of frequency deviation to the described business datum of demodulation.
11. terminal according to claim 8 is characterized in that, described first frequency offset compensation element comprises:
The first temperature survey subelement before described terminal sleeping, is measured first temperature of DCXO in the described terminal;
The second temperature survey subelement after described terminal is waken up, is measured second temperature of the DCXO of described terminal;
Search subelement, search first frequency deviation value of the described first temperature correspondence and second frequency deviation value of the described second temperature correspondence respectively;
The first compensate of frequency deviation value is obtained subelement, according to the frequency of the working frequency range of the center frequency point of the working frequency range of described first frequency deviation value and described second frequency deviation value, described terminal and the described terminal adjustment slope that shakes, obtains the first compensate of frequency deviation value;
The first compensate of frequency deviation subelement according to the described first compensate of frequency deviation value, carries out first compensate of frequency deviation.
12. a TDD system, described TDD system comprises terminal, and described terminal comprises: be used to produce the digital temperature compensation oscillator DCXO of reference clock, it is characterized in that described terminal also comprises:
First frequency offset compensation element, according to described DCXO in second temperature behind the described terminal wake-up and described DCXO the difference between first temperature before described terminal sleeping, carry out first compensate of frequency deviation of the rf frequency of described terminal;
Demodulating unit under the rf frequency behind described first compensate of frequency deviation, receives business datum, and described business datum is carried out demodulation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110005534.XA CN102065040B (en) | 2011-01-06 | 2011-01-06 | Adjustment method of terminal frequency offset, terminal and TDD (Time Division Duplexing) system |
| PCT/CN2012/070057 WO2012092866A1 (en) | 2011-01-06 | 2012-01-05 | Method, terminal and tdd system for adjusting frequency offset of terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110005534.XA CN102065040B (en) | 2011-01-06 | 2011-01-06 | Adjustment method of terminal frequency offset, terminal and TDD (Time Division Duplexing) system |
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| CN102065040B CN102065040B (en) | 2015-05-20 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012092866A1 (en) * | 2011-01-06 | 2012-07-12 | 意法·爱立信半导体（北京）有限公司 | Method, terminal and tdd system for adjusting frequency offset of terminal |
| CN106028436A (en) * | 2016-04-28 | 2016-10-12 | 华为技术有限公司 | Time and frequency deviation compensation method and user terminal |
| CN109588064A (en) * | 2016-05-13 | 2019-04-05 | 瑞典爱立信有限公司 | The network architecture, method and apparatus for cordless communication network |
| CN110855590A (en) * | 2019-11-18 | 2020-02-28 | 紫光展锐(重庆)科技有限公司 | Frequency offset compensation method, system, electronic device and computer readable storage medium |
| US11652562B2 (en) | 2016-05-13 | 2023-05-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Network architecture, methods, and devices for a wireless communications network |
| CN117118431A (en) * | 2023-09-06 | 2023-11-24 | 上海锐星微电子科技有限公司 | Temperature frequency offset compensation method and system |
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| CN112600776B (en) * | 2020-12-08 | 2022-11-25 | 上海擎昆信息科技有限公司 | Frequency offset compensation method and device suitable for OFDM system |
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| WO2012092866A1 (en) * | 2011-01-06 | 2012-07-12 | 意法·爱立信半导体（北京）有限公司 | Method, terminal and tdd system for adjusting frequency offset of terminal |
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| CN106028436A (en) * | 2016-04-28 | 2016-10-12 | 华为技术有限公司 | Time and frequency deviation compensation method and user terminal |
| US10211838B2 (en) | 2016-04-28 | 2019-02-19 | Huawei Technologies Co., Ltd. | Time-frequency deviation compensation method, and user terminal |
| US11381445B2 (en) | 2016-05-13 | 2022-07-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Network architecture, methods, and devices for a wireless communications network |
| CN109588064A (en) * | 2016-05-13 | 2019-04-05 | 瑞典爱立信有限公司 | The network architecture, method and apparatus for cordless communication network |
| US11444822B2 (en) | 2016-05-13 | 2022-09-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Procedures to control beamforming |
| CN109588064B (en) * | 2016-05-13 | 2022-11-22 | 瑞典爱立信有限公司 | Network architecture, method and apparatus for a wireless communication network |
| US11632284B2 (en) | 2016-05-13 | 2023-04-18 | Telefonaktiebolaget Lm Ericsson (Publ) | Dormant mode measurement optimization |
| US11652562B2 (en) | 2016-05-13 | 2023-05-16 | Telefonaktiebolaget Lm Ericsson (Publ) | Network architecture, methods, and devices for a wireless communications network |
| US11929866B2 (en) | 2016-05-13 | 2024-03-12 | Telefonaktiebolaget Lm Ericsson (Publ) | Dormant mode measurement optimization |
| CN110855590A (en) * | 2019-11-18 | 2020-02-28 | 紫光展锐(重庆)科技有限公司 | Frequency offset compensation method, system, electronic device and computer readable storage medium |
| CN117118431A (en) * | 2023-09-06 | 2023-11-24 | 上海锐星微电子科技有限公司 | Temperature frequency offset compensation method and system |
| CN117118431B (en) * | 2023-09-06 | 2024-03-29 | 上海锐星微电子科技有限公司 | Temperature frequency offset compensation method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102065040B (en) | 2015-05-20 |
| WO2012092866A1 (en) | 2012-07-12 |
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