CN102065040B - 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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- CN102065040B CN102065040B CN201110005534.XA CN201110005534A CN102065040B CN 102065040 B CN102065040 B CN 102065040B CN 201110005534 A CN201110005534 A CN 201110005534A CN 102065040 B CN102065040 B CN 102065040B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
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, refer to a kind of method of adjustment of frequency deviation of terminal, terminal and TDD system especially.
Background technology
In clock interface circuit, a large amount of mobile phone brings into use the transceiver that comprises voltage controlled crystal oscillator (VCXO) or use to comprise the transceiver of all-digitized demodulator crystal oscillator.Because the cost of DCXO is lower, volume is less, DCXO (digital compensated oscillator) therefore in Terminal Design, is used to produce the reference clock of system.Because DCXO does not have the function of automatic regulating frequency, if therefore compensate frequency deviation not in time and adjust, the demodulation performance of paging information can be affected.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method of adjustment of frequency deviation of terminal, terminal and TDD system, can improve and use DCXO to produce the terminal of system reference clock to the demodulation performance of 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: for generation of the digital compensated oscillator DCXO of reference clock, described method comprises:
Step 1, according to the difference between first temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carries out the first compensate of frequency deviation of the rf frequency of described terminal;
Step 2, under the rf frequency after described first compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
Described step 1 is specially: wake up in the moment shifting to an earlier date predetermined quantity subframe than the scheduling wake-up moment, and according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carry out the first compensate of frequency deviation;
After described step 1, before described step 2, described method also comprises:
Steps A 1, under the rf frequency after described first compensate of frequency deviation, obtains the second compensate of frequency deviation value;
Steps A 2, according to described second compensate of frequency deviation value, carries out the second compensate of frequency deviation of the rf frequency of described terminal;
Described step 2 is specially: under the rf frequency after described second compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
Described steps A 1 is specially: in the present sub-frame after described terminal wake-up, and under the rf frequency after described first compensate of frequency deviation, the data of receiving slot 0, obtain the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0.
Described method also comprises:
Step 3, obtains the 3rd compensate of frequency deviation value;
Step 4, according to described 3rd compensate of frequency deviation value, carries 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 described terminal;
Step B2, after described terminal is waken up, measures second temperature of the DCXO of described terminal;
Step B3, searches the first frequency deviation value corresponding to described first temperature and the second frequency deviation value corresponding to described second temperature respectively;
Step B4, according to described first frequency deviation value and described second frequency deviation value, the center frequency point of working frequency range of described terminal and the frequency vibration the tuned slope of the working frequency range of described terminal, obtains the first compensate of frequency deviation value;
Step B5, according to described first compensate of frequency deviation value, carries out the first compensate of frequency deviation.
Described step B4 adopts following formula to calculate:
N=-Δ f*M*FOE_Step, wherein, n is described first compensate of frequency deviation value, and 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 vibration the tuned slope of the working frequency range of described terminal.
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, a kind of terminal is provided, comprises: for generation of the digital compensated oscillator DCXO of reference clock, it is characterized in that, also comprise:
First frequency offset compensation element, according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carries out the first compensate of frequency deviation of the rf frequency of described terminal;
Demodulating unit, under the rf frequency after described first compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
Described terminal, also comprises:
Second compensate of frequency deviation value acquiring unit, in the present sub-frame after described terminal wake-up, under the rf frequency after described first compensate of frequency deviation, the data of receiving slot 0, obtain the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0;
Second frequency offset compensation element, carries out the second compensate of frequency deviation of the rf frequency of described terminal according to described second compensate of frequency deviation value;
Described first frequency offset compensation element is specially: wake up in the moment shifting to an earlier date predetermined quantity subframe than the scheduling wake-up moment, and according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carry out the first compensate of frequency deviation;
Described demodulating unit is specially: under the rf frequency after described second compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
Described terminal, also comprises:
3rd compensate of frequency deviation value acquiring unit, obtains the 3rd compensate of frequency deviation value;
3rd frequency offset compensation element, according to described 3rd compensate of frequency deviation value, carries out the 3rd compensate of frequency deviation to the described business datum of demodulation.
Described first frequency offset compensation element comprises:
First temperature survey subelement, before described terminal sleeping, measures first temperature of DCXO in described terminal;
Second temperature survey subelement, after described terminal is waken up, measures second temperature of the DCXO of described terminal;
Search subelement, search the first frequency deviation value corresponding to described first temperature and the second frequency deviation value corresponding to described second temperature respectively;
First compensate of frequency deviation value obtains subelement, according to described first frequency deviation value and described second frequency deviation value, the center frequency point of working frequency range of described terminal and the frequency vibration the tuned slope of the working frequency range of described terminal, obtains the first compensate of frequency deviation value;
First compensate of frequency deviation subelement, according to described first compensate of frequency deviation value, carries out the first compensate of frequency deviation.
On the other hand, provide a kind of TDD system, described TDD system comprises terminal, and described terminal comprises: for generation of the digital compensated oscillator DCXO of reference clock, it is characterized in that, described terminal also comprises:
First frequency offset compensation element, according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carries out the first compensate of frequency deviation of the rf frequency of described terminal;
Demodulating unit, under the rf frequency after described first compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
Embodiments of the invention have following beneficial effect:
In such scheme, terminal is according to the difference between second temperature of DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carry out the first compensate of frequency deviation of the rf frequency of described terminal, can compensate in time frequency deviation and adjust, improve the demodulation performance of paging information.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of an embodiment of the method for adjustment of the frequency deviation of terminal of the present invention;
Fig. 2 is the schematic flow sheet of another embodiment of the method for 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 the application scenarios of the method for adjustment of the frequency deviation of terminal of the present invention.
Embodiment
For embodiments of the invention will be solved technical problem, technical scheme and advantage clearly, 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: for generation of the digital compensated oscillator DCXO of reference clock, described method comprises:
Step 11, according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carries out the first compensate of frequency deviation of the rf frequency of described terminal;
Step 12, under the rf frequency after described first compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
In such scheme, can compensate in time frequency deviation and adjust, improve the demodulation performance of paging information.
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: for generation of the digital compensated oscillator DCXO of reference clock, described method comprises:
Step 21, woke up in the moment shifting to an earlier date predetermined quantity subframe than the scheduling wake-up moment, and according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carried out the first compensate of frequency deviation; Wherein, 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.
Step 22, under the rf frequency after described first compensate of frequency deviation, obtains the second compensate of frequency deviation value; Be specially: in the present sub-frame after described terminal wake-up, under the rf frequency after described first compensate of frequency deviation, the data of receiving slot 0, obtain the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0.
Step 23, according to described second compensate of frequency deviation value, carries out the second compensate of frequency deviation of the rf frequency of described terminal;
Step 24, under the rf frequency after described second compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
Step 25, obtains the 3rd compensate of frequency deviation value;
Step 26, according to described 3rd compensate of frequency deviation value, carries out the 3rd compensate of frequency deviation to the described business datum of demodulation.
Described step 21 comprises:
First, before described terminal sleeping, measure first temperature of DCXO in described terminal;
Then, after described terminal is waken up, measure second temperature of the DCXO of described terminal;
Then, the first frequency deviation value corresponding to described first temperature and the second frequency deviation value corresponding to described second temperature is searched respectively;
Then, according to described first frequency deviation value and described second frequency deviation value, the center frequency point of working frequency range of described terminal and the frequency vibration the tuned slope of the working frequency range of described terminal, the first compensate of frequency deviation value is obtained; Wherein, adopt following formula to calculate: n=mono-Δ f*M*FOE_Step, wherein, n is described first compensate of frequency deviation value, and 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 vibration the tuned slope of the working frequency range of described terminal.
Then, according to described first compensate of frequency deviation value, the first compensate of frequency deviation is carried out.
As shown in Figure 3, be a kind of terminal of the present invention, comprise: for generation of the digital compensated oscillator DCXO of reference clock, also comprise:
First frequency offset compensation element 31, according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carries out the first compensate of frequency deviation of the rf frequency of described terminal;
Demodulating unit 32, under the rf frequency after described first compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
Described terminal, also comprises:
Second compensate of frequency deviation value acquiring unit 33, in the present sub-frame after described terminal wake-up, under the rf frequency after described first compensate of frequency deviation, the data of receiving slot 0, obtain the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0;
Second frequency offset compensation element 34, carries out the second compensate of frequency deviation of the rf frequency of described terminal according to described second compensate of frequency deviation value;
Described first frequency offset compensation element 31 is specially: wake up in the moment shifting to an earlier date predetermined quantity subframe than the scheduling wake-up moment, and according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carry out the first compensate of frequency deviation;
Described demodulating unit 32 is specially: under the rf frequency after described second compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
Described terminal, also comprises:
3rd compensate of frequency deviation value acquiring unit 35, obtains the 3rd compensate of frequency deviation value;
3rd frequency offset compensation element 36, according to described 3rd compensate of frequency deviation value, carries out the 3rd compensate of frequency deviation to the described business datum of demodulation.
Described first frequency offset compensation element 31 comprises:
First temperature survey subelement, before described terminal sleeping, measures first temperature of DCXO in described terminal;
Second temperature survey subelement, after described terminal is waken up, measures second temperature of the DCXO of described terminal;
Search subelement, search the first frequency deviation value corresponding to described first temperature and the second frequency deviation value corresponding to described second temperature respectively;
First compensate of frequency deviation value obtains subelement, according to described first frequency deviation value and described second frequency deviation value, the center frequency point of working frequency range of described terminal and the frequency vibration the tuned slope of the working frequency range of described terminal, obtains the first compensate of frequency deviation value;
First compensate of frequency deviation subelement, according to described first compensate of frequency deviation value, carries out the first compensate of frequency deviation.
On the other hand, provide a kind of TDD system, described TDD system comprises terminal, and described terminal comprises: for generation of the digital compensated oscillator DCXO of reference clock, described terminal also comprises:
First frequency offset compensation element, according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carries out the first compensate of frequency deviation of the rf frequency of described terminal;
Demodulating unit, under the rf frequency after described first compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
As shown in Figure 4, during for illustrated TD-SCDMA system employing DCXO, the application scenarios of the frequency deviation processing method under idle condition.The invention is not restricted to TD-SCDMA system, may be used for other TDD (Time Division Duplexing, time division duplex) system.In this application scene, terminal adopts the transceiver of DCXO, and terminal utilizes DCXO (digital compensation crystal oscillator) to produce system 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 when each sleep and wakes up, when each sleep is waken up, SC (system controller) dispatches temperature survey, and carry out compensate of frequency deviation according to variations in temperature, this compensate of frequency deviation completes before radio frequency is started working, and ensures the state that frequency has reached stable; Wherein, 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, first, before each sleep, terminal at least carries out a temperature survey to system clock, and before preserving sleep, last temperature value is T
1.
Then, in given sleep cycle, terminal shifts to an earlier date a subframe and wakes up.First SC dispatching patcher clock carries out temperature survey, and to record temperature value be T
2.
Then, table look-up according to temperature value and obtain corresponding frequency deviation value, this table is provided by chip manufacturer and is kept in terminal read-only storage.If temperature T
1corresponding frequency deviation value is f (T
1) ppm, temperature T
2corresponding frequency deviation value is f (T
2) ppm.Then in this sleep cycle, temperature variant frequency deviation is: Δ t=f (T
2)-f (T
1).
Then, frequency deviation is transformed Hz from ppm by the center frequency point (2017.4MHz) according to working frequency range, is specially: F (Hz)=Δ f*2017.4.
Then, the frequency deviation control word obtaining this time adjusting according to the frequency deviation the tuned slope FOE_Step of this working frequency range is: n=-F (Hz) * FOE_Step.Wherein, frequency deviation the tuned slope FOE_Step obtains after starting up of terminal.
Then, adjustment amount n is applied to the adjustment of rf frequency by system controller by simulation or digital form.
Step 2: after having carried out temperature-compensating, terminal is in the subframe of n-th rule of waking up, start the data receiving TS0, P-CCPCH channel is utilized to carry out frequency deviation estimation, and the frequency deviation of estimation is fed back to system controller control rf frequency in present sub-frame, frequency deviation residual after compensating with further compensation temperature.
Draw according to crystal property and large quantity research, after temperature-compensating frequency deviation, still remain the frequency deviation being 800Hz to the maximum, and emulation points out that the frequency deviation of TD-SCDMA system BCH (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 to ensure to sleep, need to advance the inclined estimation of line frequency and compensation, therefore n subframe is waken up in advance in demodulation.If frequency deviation residual after temperature-compensating is less and in the scope that terminal demodulates allows, then need not wake up in advance.
This frequency deviation estimates P-CCPCH (Primary Common Control Physical Channel) data utilizing TS0 (time slot 0), and P-CCPCH adopts QPSK (quarternary phase-shift keying (QPSK)) modulation.And estimate to adopt many algorithms based on the frequency deviation of QPSK modulation, illustrate as follows:
According to TD-SCDMA structure of time slot, the symbol being positioned at the P-CCPCH before Mid-amble code (intermediate code) after supposing demodulation is r
1i (), the symbol being positioned at Mid-amble code P-CCPCH is below r
2(i).The symbol of firmly sentencing obtained based on demodulation symbol is respectively
with
order
conj (x) represents the conjugation of x.By symbol conjugate multiplication before and after Mid-amble:
n be before Mid-amble or after symbol numbers.Because P-CCPCH is mapped to two physical code channels, two code channels can be added up:
finally obtaining frequency deviation value is:
wherein
for plural number
phase place, Q is spreading factor, T
cfor spreading rate.。
The frequency deviation value estimated when frame should feed back to SC when frame, and SC controls rf frequency by the mode of simulation or numeral.
Step 3: terminal starts to receive data and carries out corresponding demodulation, in order to overcome the impact of frequency deviation further, needs to utilize the frequency deviation value estimated when frame to carry out compensate of frequency deviation to the data of demodulation in demodulating process.
Suppose that terminal sleep needs listening broadcast after waking up, therefore after carrying out compensate of frequency deviation, the data that terminal starts to receive TS0 carry out the demodulation of BCH.Frequency deviation estimation is carried out to the P-CCPCH symbol of demodulation, the method and the frequency deviation estimating method described in step 2 similar, repeat no more here.
Suppose that the frequency deviation value estimated is f
measured.The compensation method utilizing the symbol of frequency deviation to demodulation estimated to compensate has multiple.For a kind of wherein method: before Mid-amble, the offset of m data is
after Mid-amble, the offset of m data is
data after finally compensating are: r
1(i)=r (i) * e^ (j*f
comp).Wherein, r
1i () is the data after compensation, r (i) is the data before compensating, and e is constant.Then, terminal utilizes the operations such as the decoding data after compensating.
In the present invention, when terminal is in idle condition, to wake up paging receiving information in each DRX (Discontinuous Reception, discontinuous reception) cycle.And, larger frequency deviation may be brought in the change of each DRX cycle temperature, propose the frequency offset regulation method of DCXO under a kind of idle pulley, first according to temperature, frequency deviation is adjusted, carry out frequency deviation Estimation and rectification according to the data of the TS0 received again, ensure that the demodulation performance of each DRX cycle paging information.
Described embodiment of the method is corresponding with described device embodiment, the description of relevant portion in the part comparable device embodiment do not described in detail in embodiment of the method, the description of relevant portion in the part reference method embodiment do not described in detail in device embodiment.
One of ordinary skill in the art will appreciate that, the all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in a computer read/write memory medium, this program is when performing, comprise the step as above-mentioned embodiment of the method, described storage medium, as: magnetic disc, CD, read-only store-memory body (Read-Only Memory, or random store-memory body (Random Access Memory, RAM) etc. ROM).
In each embodiment of the method for the present invention; the sequence number of described each step can not be used for the sequencing limiting each step; for those of ordinary skill in the art, under the prerequisite not paying creative work, the priority of each step is changed also within protection scope of the present invention.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing 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. a method of adjustment for the frequency deviation of terminal, described terminal comprises: for generation of the digital compensated oscillator DCXO of reference clock, it is characterized in that, described method comprises:
Step 1, according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carry out the first compensate of frequency deviation of the rf frequency of described terminal, wherein, described terminal was waken up in the moment of the subframe shifting to an earlier date predetermined quantity than the scheduling wake-up moment, and 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;
Step 2, under the rf frequency after described first compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
2. the method for adjustment of the frequency deviation of terminal according to claim 1, is characterized in that,
After described step 1, before described step 2, described method also comprises:
Steps A 1, under the rf frequency after described first compensate of frequency deviation, obtains the second compensate of frequency deviation value;
Steps A 2, according to described second compensate of frequency deviation value, carries out the second compensate of frequency deviation of the rf frequency of described terminal;
Described step 2 is specially: under the rf frequency after described second compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
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 present sub-frame after described terminal wake-up, under rf frequency after described first compensate of frequency deviation, the data of receiving slot 0, obtain 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, obtains the 3rd compensate of frequency deviation value;
Step 4, according to described 3rd compensate of frequency deviation value, carries 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 described terminal;
Step B2, after described terminal is waken up, measures second temperature of the DCXO of described terminal;
Step B3, searches the first frequency deviation value corresponding to described first temperature and the second frequency deviation value corresponding to described second temperature respectively;
Step B4, according to described first frequency deviation value and described second frequency deviation value, the center frequency point of working frequency range of described terminal and the frequency vibration the tuned slope of the working frequency range of described terminal, obtains the first compensate of frequency deviation value;
Step B5, according to described first compensate of frequency deviation value, carries out the 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 described first compensate of frequency deviation value, and 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 vibration the tuned slope of the working frequency range of described terminal.
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. a terminal, comprising: for generation of the digital compensated oscillator DCXO of reference clock, it is characterized in that, also comprise:
First frequency offset compensation element, according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carry out the first compensate of frequency deviation of the rf frequency of described terminal, wherein, described terminal was waken up in the moment of the subframe shifting to an earlier date predetermined quantity than the scheduling wake-up moment, and 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;
Demodulating unit, under the rf frequency after described first compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
9. terminal according to claim 8, is characterized in that, also comprises:
Second compensate of frequency deviation value acquiring unit, in the present sub-frame after described terminal wake-up, under the rf frequency after described first compensate of frequency deviation, the data of receiving slot 0, obtain the second compensate of frequency deviation value according to the Traffic Channel of described time slot 0;
Second frequency offset compensation element, carries out the second compensate of frequency deviation of the rf frequency of described terminal according to described second compensate of frequency deviation value;
Described demodulating unit specifically for: under the rf frequency after described second compensate of frequency deviation, receive business datum, and demodulation carried out to described business datum.
10. terminal according to claim 8, is characterized in that, also comprises:
3rd compensate of frequency deviation value acquiring unit, obtains the 3rd compensate of frequency deviation value;
3rd frequency offset compensation element, according to described 3rd compensate of frequency deviation value, carries out the 3rd compensate of frequency deviation to the described business datum of demodulation.
11. terminals according to claim 8, is characterized in that, described first frequency offset compensation element comprises:
First temperature survey subelement, before described terminal sleeping, measures first temperature of DCXO in described terminal;
Second temperature survey subelement, after described terminal is waken up, measures second temperature of the DCXO of described terminal;
Search subelement, search the first frequency deviation value corresponding to described first temperature and the second frequency deviation value corresponding to described second temperature respectively;
First compensate of frequency deviation value obtains subelement, according to described first frequency deviation value and described second frequency deviation value, the center frequency point of working frequency range of described terminal and the frequency vibration the tuned slope of the working frequency range of described terminal, obtains the first compensate of frequency deviation value;
First compensate of frequency deviation subelement, according to described first compensate of frequency deviation value, carries out the first compensate of frequency deviation.
12. 1 kinds of TDD systems, described TDD system comprises terminal, and described terminal comprises: for generation of the digital compensated oscillator DCXO of reference clock, it is characterized in that, described terminal also comprises:
First frequency offset compensation element, according to the difference between second temperature of described DCXO after described terminal wake-up and first temperature of described DCXO before described terminal sleeping, carry out the first compensate of frequency deviation of the rf frequency of described terminal, wherein, described terminal was waken up in the moment of the subframe shifting to an earlier date predetermined quantity than the scheduling wake-up moment, and 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;
Demodulating unit, under the rf frequency after described first compensate of frequency deviation, receives business datum, and carries out demodulation to described business datum.
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|---|---|---|---|
| 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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|---|---|---|---|
| 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 (en) * | 2011-01-06 | 2015-05-20 | 意法·爱立信半导体（北京）有限公司 | Adjustment method of terminal frequency offset, terminal and TDD (Time Division Duplexing) system |
| CN104717725B (en) * | 2013-12-12 | 2018-09-07 | 展讯通信（上海）有限公司 | A kind of synchronous method under LTE system discontinuous reception modes |
| CN106028436B (en) * | 2016-04-28 | 2019-10-25 | 华为技术有限公司 | A kind of method and user terminal of time-frequency offset compensation |
| US10367677B2 (en) | 2016-05-13 | 2019-07-30 | Telefonaktiebolaget Lm Ericsson (Publ) | Network architecture, methods, and devices for a wireless communications network |
| US10630410B2 (en) | 2016-05-13 | 2020-04-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Network architecture, methods, and devices for a wireless communications 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 |
| 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 |
| 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 |
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| US20050093638A1 (en) * | 2003-11-03 | 2005-05-05 | Heng-Chih Lin | Methods and apparatus to control frequency offsets in digitally controlled crystal oscillators |
| KR100691993B1 (en) * | 2005-10-26 | 2007-03-09 | 엘지전자 주식회사 | Mobile terminal for compensating a frequency error followed a temperature |
| US7456782B2 (en) * | 2005-12-29 | 2008-11-25 | Sirf Technology, Inc. | Timing calibration for fast signal reacquisition in navigational receivers |
| CN201536362U (en) * | 2009-09-19 | 2010-07-28 | 无锡爱睿芯电子有限公司 | Temperature sensing oscillator and temperature frequency correction system |
| CN102065040B (en) * | 2011-01-06 | 2015-05-20 | 意法·爱立信半导体（北京）有限公司 | Adjustment method of terminal frequency offset, terminal and TDD (Time Division Duplexing) system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101034909A (en) * | 2006-02-15 | 2007-09-12 | 三星电子株式会社 | Apparatus and method for sharing a tcxo of a mobile terminal |
| CN101842974A (en) * | 2007-10-30 | 2010-09-22 | 高通股份有限公司 | Temperature compensation for crystal oscillators |
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| CN102065040A (en) | 2011-05-18 |
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