CN100459793C - Method and apparatus for whole channel primary searching - Google Patents
Method and apparatus for whole channel primary searching Download PDFInfo
- Publication number
- CN100459793C CN100459793C CNB2005100643098A CN200510064309A CN100459793C CN 100459793 C CN100459793 C CN 100459793C CN B2005100643098 A CNB2005100643098 A CN B2005100643098A CN 200510064309 A CN200510064309 A CN 200510064309A CN 100459793 C CN100459793 C CN 100459793C
- Authority
- CN
- China
- Prior art keywords
- agc
- value
- rssi
- frequency
- measurement
- 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
- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000005259 measurement Methods 0.000 claims abstract description 54
- 238000012163 sequencing technique Methods 0.000 claims abstract description 10
- 230000005540 biological transmission Effects 0.000 claims description 2
- 210000000678 band cell Anatomy 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000005587 bubbling Effects 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
A method for searching all frequency band cell includes measuring RSSI value of frequency point in all frequency band by applying fixed AGC gain value and calculating out AGC regulation increment required by next time of all frequency band RSSI measurement as per obtained RSSI value, repeating above said step till AGC regulation increment is less than a certain threshold, sequencing power of all frequency band frequency point RSSI according to RSSI result of the last all frequency measurement. The device for realizing said method is also disclosed.
Description
Technical field
The present invention relates to the whole channel primary searching technology of code division multiple access (CDMA) system terminal, particularly relate to a kind of whole channel primary searching automatic gain control (AGC) method of adjustment and based on the device of this method.
Background technology
Growing along with wireless communication technology, it is more and more to use portable terminal to carry out the user of radio communication, and simultaneously, also when the river rises the boat goes up to the requirement of wireless communication technology and portable terminal to have mobile terminal user.Such as, for the user that frequent commercial affairs are gone on business or traveled, the communication capacity of travelling carriage under roaming state is very important.In cdma system, when travelling carriage roams to the another one country from a country, and when the planning of the frequency spectrum between two countries there are differences, perhaps during the long-time out of reach of travelling carriage, in order to search out new network timely, travelling carriage must carry out Cell searching in full frequency band, whether have available network resources in the whole frequency for confirmation.
Roam to the situation of other country for travelling carriage, travelling carriage needs to finish a full frequency band search at least just can search out available network; For the situation of the long-time out of reach of travelling carriage, travelling carriage must constantly repeat the process of full frequency band search, until coming back to network coverage area.Usually, the process of full frequency band search is consuming time longer, will cause the operating mobile station decrease in efficiency.In addition, no matter be above-mentioned which kind of situation, when carrying out the full frequency band search, travelling carriage is in running order all the time, and this will cause consuming excessively of travelling carriage battery, thereby reduce greatly the stand-by time of travelling carriage and the useful life of battery.So, improve the speed of full frequency band search, be the key issue that improves operating mobile station efficient and service efficiency.
At present existing several different methods improves the speed of full frequency band search, wherein a kind of is the method for utilizing received signal intensity indication (RSSI), its principle is: in general, near near the working frequency points other idle frequency of RSSI power ratio RSSI power is higher usually, therefore, before the search available cell, the RSSI performance number (being designated hereinafter simply as the RSSI value) of the frequency of full frequency band is sorted, promptly, at first measure the RSSI value of all frequencies in the full frequency band scope, according to the result who measures, according to the size of RSSI value all frequencies are sorted, be the priority of all frequency point setting Cell searchings then according to ranking results, sequencing according to frequency priority is carried out Cell searching, that is to say that when the search available cell, the frequency that RSSI power is strong has precedence over the low frequency of power.
But, the excursion of the RSSI value of working frequency points is very big, with the TD-SCDMA terminal is example, the RSSI maximum of its received signal is-25 decibels above milliwatts (dBm), minimum value is-108dBm, excursion reaches 83 decibels (dB), in addition, also there is very big excursion in RSSI value between the different frequent points of frequency range, and still, the sample quantization figure place of analog to digital converter (ADC) is generally 4 to 12 at present, the variation of RSSI value might exceed the expression scope of ADC, so, need to adjust automatic gain control (AGC) yield value usually the RSSI value is adjusted, make adjusted RSSI value within the ADC quantizing range.
To the RSSI value adjust be to rssi measurement to value add that AGC adjusts increment, when RSSI value scope is excessive, carry out the AGC adjustment after, its span will be dwindled, and be convenient to the RSSI value is quantized and analog-to-digital conversion.Otherwise, if RSSI value scope is too small, carries out the AGC adjustment its span is enlarged, be convenient to its value is quantized and analog-to-digital conversion.
In whole channel primary searching, the method for adjustment of most of AGC is to adopt fixing AGC yield value at present, and promptly in whole full frequency band frequency point sequencer procedure, for the RSSI value of all frequencies, the AGC yield value remains constant.
The method of the AGC yield value that this employing is single has distinct disadvantage, before carrying out the full frequency band frequency point measurement, portable terminal can't be determined the RSSI watt level of real work frequency, so, when the signal power of real work frequency is bigger, if it is excessive that the AGC yield value is provided with, then the RSSI value of real work frequency is with saturated; Otherwise too small if the AGC yield value is provided with when the signal power of working frequency points is smaller, then the number of significant digit of the RSSI value of working frequency points will be very few.In the above two kinds of cases, frequency is measured can't reach certain certainty of measurement, and real working frequency points might can't come to be disturbed before the frequency, makes that the resultant error that sorts according to frequency RSSI value is bigger, even loses meaning.Its final result is that the whole channel primary searching process is had to spend the more time and got rid of disturbing frequency, the successful turn-on time that this has just increased whole Cell searching greatly, becomes the Cell searching bottleneck of performance.
The method of adjustment of another kind of AGC is that the RSSI value to each frequency takes multiple measurements, and adjusts the AGC yield value of this frequency according to the rssi measurement result of certain frequency last time, in the AGC yield value is stabilized in a reasonable range.
The advantage of this method is to provide than first method measured value more accurately, but also has open defect: at first, each frequency is taken multiple measurements the excessive cycle that will cause full frequency band frequency point to be measured, poor in timeliness; Secondly, the AGC yield value difference between each frequency is introduced measure error easily; The 3rd, this method is not considered the correlation that exists between the frequency, and it is rationally utilized; At last, this method is subjected to the influence of noise and decline easily.
Summary of the invention
Main purpose of the present invention is to provide a kind of method of whole channel primary searching, adjusts the AGC yield value by mode flexibly and fast, improves the speed and the accuracy rate of whole channel primary searching.
Another object of the present invention is to provide a kind of whole channel primary searching device, realize the AGC yield value is carried out flexibly and adjustment fast.
The objective of the invention is to be achieved through the following technical solutions:
A kind of method of whole channel primary searching comprises the steps:
A, automatic gain is set, and to adjust the AGC initial yield value be current AGC yield value;
The received signal intensity indicating RSSI value of frequency adopts current AGC yield value that all detected RSSI values are adjusted in B, the measurement full frequency band, and calculates AGC according to all adjusted RSSI values of gain and adjust increments;
C, judge whether the absolute value that AGC adjusts increment adjusts thresholding less than the AGC gain that is provided with, if, execution in step D then, otherwise, the AGC of current AGC yield value and calculating is adjusted the increment sum as new AGC yield value, judge whether new AGC yield value exceeds the maximum range of AGC, if, execution in step D then, otherwise, new AGC yield value as current AGC yield value, is returned step B then.
D, all RSSI values that the last time is measured gained sort, and according to ranking results the priority of each frequency are set, and carry out Cell searching according to priority orders then.
Wherein, this method further comprises: the RSSI desired value is set,
The described calculating of step B AGC adjustment increment is poor for maximum RSSI value in this measurement frequency and RSSI desired value.
Wherein, described target RSSI value can be configured such that the RSSI value is unsaturated and make the RSSI value have the arbitrary value of default number of significant digit.
Preferably, described target RSSI value is 0dB.
Wherein, described AGC initial yield value can be configured such that the undersaturated arbitrary value of maximum RSSI value.
Preferably, described AGC initial yield value is 40dB.
Wherein, this method further comprises: the AGC gain is set adjusts thresholding,
Wherein, in step B, the RSSI value of measuring frequency in the full frequency band is: measure the RSSI value of all frequencies in the full frequency band, or the RSSI value of frequency uniformly-spaced in the measurement full frequency band.
A kind of device 20 of whole channel primary searching comprises radio-frequency module 21, measures order module 22, control module 23 and cell search module 24, wherein,
Radio-frequency module 21 receives radio frequency signal by the antenna of portable terminal, and exports radiofrequency signal to measurement order module 22;
Measure the radiofrequency signal that order module 22 received RF modules 21 transmit, measure the RSSI value of frequency in the full frequency band, adopt current AGC yield value that all detected RSSI values are adjusted, and calculate the AGC value according to all adjusted RSSI values of gain and adjust increment, RSSI value to frequency in the full frequency band sorts, according to ranking results the priority of each frequency is set, and exports priority and ranking results to cell search module 24;
When measuring AGC value that order module 22 calculates and adjust the absolute value of increment and adjust thresholding, send the ordering index signal to measurement order module 22 less than the AGC gain that is provided with;
When the absolute value of AGC adjustment increment is not less than the AGC gain adjustment thresholding of setting, the AGC of current AGC yield value and calculating is adjusted the increment sum as new AGC yield value, if new AGC yield value exceeds the maximum range of AGC, then send the ordering index signal to measuring order module (22), otherwise, new AGC yield value as current AGC yield value, and is sent the measurement index signal to measuring order module (22).
Wherein, described measurement order module 22 comprises rssi measurement unit 221, AGC incremental computations unit 222 and RSSI sequencing unit 223,
The measurement result that AGC incremental computations unit 222 transmits according to rssi measurement unit 221 is calculated AGC value and is adjusted increment, and the AGC value adjustment increment that will calculate gained exports control device 23 to;
RSSI sequencing unit 223 receives the ordering index signal of control module 23, the RSSI value of frequency sorts in the full frequency band that rssi measurement unit 221 is sent, according to ranking results the priority of each frequency is set, exports priority and ranking results to cell search module 24 then.
The method of whole channel primary searching of the present invention, set the AGC gain initial value, and the RSSI value of fixing frequency in this AGC yield value measurement full frequency band, and calculate the adjustment increment of AGC in the full frequency band measuring process that next time may carry out according to the measurement result of RSSI value, thereby obtain new AGC yield value, repeat above-mentioned steps and satisfy termination condition until AGC adjustment increment, stop the last RSSI value of measuring of AGC adjustment process and basis this moment and carry out the sequencer procedure of full frequency band frequency point power, the result according to ordering carries out Cell searching then.Adopt method of the present invention, not only can give prominence to working frequency points, make the accuracy of Cell searching increase, and can improve the speed of Cell searching.Device of the present invention is based on method of the present invention, measures precisely and advantage fast so device of the present invention has, thereby improves the satisfaction of mobile phone users.
Description of drawings
Fig. 1 is the method flow diagram of the whole channel primary searching of one embodiment of the present invention;
Fig. 2 is the structure drawing of device according to whole channel primary searching of the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is further described below in conjunction with the drawings and specific embodiments.
Method of the present invention is to adopt fixing AGC yield value to measure the RSSI value of frequency in the full frequency band, and calculate AGC according to the RSSI value that measures and adjust increment, obtain new AGC yield value, repeat above-mentioned steps and satisfy termination condition until AGC adjustment increment, stop the AGC adjustment process this moment and also carry out the sequencer procedure of full frequency band frequency point power according to the RSSI value that measures for the last time, the result according to ordering carries out Cell searching then.
Fig. 1 is the method flow diagram according to whole channel primary searching of the present invention, as can be seen from Figure 1, the present invention includes following steps:
Step 101: the AGC initial yield value of portable terminal is set, is used for the frequency of full frequency band is measured for the first time, the AGC initial yield value is set to current AGC yield value.
The AGC initial yield value can be configured such that the undersaturated arbitrary value of maximum RSSI value, in the present embodiment, the AGC initial yield value is set to 40dB, and this is a preferred value, because this initial value is unlikely to make maximum RSSI value saturated usually.
Step 102: all frequencies of full frequency band are detected the RSSI value continuously and adopt current AGC yield value to the adjustment that gains of all detected RSSI values.
The computing formula of the RSSI value of frequency i is:
Wherein, ‖ ‖
2Expression modulus of complex number side; K is the chip sequence number, and its span is 0 to N; N is the average length of chip; For Frequency Division Duplexing (FDD) (UTRA FDD) pattern of general land wireless access, r
i(k) any segment base band complex signal that receives on frequency i for portable terminal is for time division duplex (UTRA TDD) pattern of general land wireless access, r
i(k) a segment base band complex signal that has valid data that receives on frequency i for portable terminal; RSSI
iReceived signal intensity indication for frequency i.
Adopt current AGC yield value to RSSI
iThe value that gains after adjusting is RSSI
i'.
Step 103: the adjustment increment that calculates AGC.
In the present embodiment, utilize this to measure the adjustment increment that all RSSI values that obtain are calculated AGC, the computing formula that AGC adjusts increment is: Δ AGC
Next=RSSI
Target' RSSI
Max' (dB)
Wherein, RSSI
Target' be the maximum RSSI value of the frequency of the expectation that sets in advance, promptly target RSSI value can be configured such that target RSSI value that the RSSI value is unsaturated and make the RSSI value have the arbitrary value of enough number of significant digit, in the present embodiment, is set to 0dB, RSSI
Max' be the maximum of in step 102, measuring in the frequency RSSI value in the full frequency band scope.
Step 104: judge that whether AGC adjusts the absolute value of increment less than the AGC gain adjustment thresholding that sets in advance, if then execution in step 107; Otherwise, execution in step 105.
It is to consider the influence of measure error and noise and decline and the tolerance limit of the AGC yield value set that thresholding is adjusted in AGC gain, and in the present embodiment, it is 15dB that threshold setting is adjusted in the AGC gain, that is to say, if RSSI
Max' satisfy-15dBm≤RSSI
Max'≤15dBm thinks that then current AGC yield value satisfies measurement requirement.
Step 105: adjust the new AGC yield value of incremental computations according to current AGC yield value with the AGC that calculates, new AGC yield value is made as current AGC yield value.
The computing formula of new AGC yield value is: AGC
Next=AGC
Last+ Δ AGC
Next
Wherein, AGC
LastBe the AGC yield value that is provided with in the last full frequency band rssi measurement process, Δ AGC
NextThe AGC that calculates for step 103 adjusts increment, AGC
NextBe to measure set new AGC yield value for carrying out in the full frequency band next time frequency RSSI value.
Step 106: judge whether current AGC yield value exceeds the maximum range of AGC, if then execution in step 107; Otherwise, return step 102, utilize new current AGC yield value to measure next time.
Usually, the maximum range of AGC is determined by hardware condition.
Step 107: carry out full frequency band frequency point ordering, and according to ranking results the priority of each frequency is set, execution in step 108 then.
Can adopt of the frequency ordering of known arbitrarily sort method, such as bubbling method or dichotomy etc. to full frequency band.After ordering, the result according to ordering is provided with frequency priority, that is to say, and the priority height of the forward frequency of sorting position, the frequency priority after sorting position leans on is low.
Step 108: the priority orders according to frequency in the full frequency band is carried out Cell searching.
In the present embodiment, the basic step of Cell searching is: the result according to ordering carries out successively by the frequency point cell search procedure, till successfully searching the frequency that first can be resident.Concrete search technique is identical with prior art, does not repeat them here.
In the step 102 of the foregoing description, RSSI value to full frequency band frequency point is measured one by one, promptly measure the RSSI value of each frequency, in other embodiments of the invention, also can carry out interval measurement to the RSSI value of full frequency band frequency point, that is to say, do not measure the RSSI value of all frequencies, but the RSSI value of some equally spaced frequency is measured.Preferably, the bandwidth of system is depended at the interval of measurement usually, is the system of 3.84M chips/sec for spreading rate, and its system bandwidth is about about 5MHz, can adopt the measurement interval of 200KHz, 400KHz, 800KHz or 1600KHz usually; And be the system of 1.28M chips/sec for spreading rate, its system bandwidth is about about 1.6MHz, and the measurement that can adopt 200KHz or 400KHz usually is at interval.
The advantage that equally spaced frequency in the full frequency band is measured is to shorten to a certain extent the time of Cell searching.
In the above-described embodiments, AGC adjustment increment is poor for target RSSI value and this maximum RSSI value that measures, in other embodiments of the invention, adopts similar approach to calculate AGC and adjusts increment.For instance, in another embodiment, set in advance the step value that AGC adjusts,, in finishing full frequency band, after the measurement of frequency RSSI value, adopt the adjustment increment of method calculating AGC same as the previously described embodiments such as 20dB.If this AGC adjusts the absolute value of increment greater than adjusting step-length, then the AGC yield value is readjusted according to the size of adjusting step-length, be that the AGC yield value adds or deduct step value, obtain new AGC yield value, repeat then above-mentioned steps until the absolute value of adjusting increment less than adjusting step-length, measurement result to the last RSSI value sorts, and carries out Cell searching according to ranking results then.
Based on said method, the present invention also provides a kind of whole channel primary searching device.Fig. 2 is the structure chart of this device, and as shown in the figure, cell search apparatus 20 comprises radio-frequency module 21, measures order module 22, control module 23 and cell search module 24.
Wherein, radio-frequency module 21 receives radio frequency signal by the antenna of portable terminal, and exports radiofrequency signal to measurement order module 22; Measure the radio frequency signal of order module 22 received RF modules 21 outputs, the RSSI value of the interior frequency of measurement full frequency band, calculating AGC adjust increment and according to the RSSI value frequency in the full frequency band are sorted, and ranking results are exported to the cell search module 24 of portable terminal; Control module 23 control radio-frequency modules 21 and the work of measuring order module 22, and the running parameter of setting radio-frequency module 21 and measurement order module 22, for example radio frequency carrier frequency and AGC initial yield value, control module 23 receives the AGC adjustment increment of measuring order module 22 outputs and determines whether to carry out ordering, if then send the ordering index signal to measuring order module 22; Otherwise, measure index signal to measuring order module 22, continue to measure the RSSI value of frequency in the full frequency band.
In measuring order module 22, be provided with rssi measurement unit 221, AGC incremental computations unit 222 and RSSI sequencing unit 223.Rssi measurement unit 221 carries out the measurement of full frequency band frequency point RSSI value according to the radio frequency signal that radio-frequency module 21 transmits, and exports the RSSI value of measuring to AGC incremental computations unit 222 and RSSI sequencing unit 223 then; Increment is adjusted according to the AGC that the RSSI value calculates full frequency band frequency point measurement next time in AGC incremental computations unit 222, then AGC is adjusted increment size and export control module 23 to, judge that by control module 23 AGC adjusts increment and whether satisfies termination condition, if, then to RSSI sequencing unit 223 output ordering index signals, the output valve that activates 223 pairs of rssi measurement unit 221 of RSSI sequencing unit sorts entirely, and according to the result of ordering to each frequency point setting priority, the result that will sort then with priority exports cell search module 24 to; Otherwise index signal is measured in 221 outputs to the rssi measurement unit, and indication rssi measurement unit 221 utilizes new AGC yield value to measure the RSSI value of full frequency band frequency point.
In concrete implementation process, can carry out suitable improvement, to adapt to the concrete needs of concrete condition to the method according to this invention and device.Therefore be appreciated that according to the specific embodiment of the present invention just to play an exemplary role, not in order to restriction protection scope of the present invention.
Claims (9)
1, a kind of method of whole channel primary searching is characterized in that, this method comprises the steps:
A, automatic gain is set, and to adjust the AGC initial yield value be current AGC yield value;
The received signal intensity indicating RSSI value of frequency adopts current AGC yield value that all detected RSSI values are adjusted in B, the measurement full frequency band, and calculates AGC according to all adjusted RSSI values of gain and adjust increments;
C, judge whether the absolute value that AGC adjusts increment adjusts thresholding less than the AGC gain that is provided with, if, execution in step D then, otherwise, the AGC of current AGC yield value and calculating is adjusted the increment sum as new AGC yield value, judge whether new AGC yield value exceeds the maximum range of AGC, if, execution in step D then, otherwise, new AGC yield value as current AGC yield value, is returned step B then;
D, all RSSI values that the last time is measured gained sort, and according to ranking results the priority of each frequency are set, and carry out Cell searching according to priority orders then.
2, method according to claim 1 is characterized in that, this method further comprises: the RSSI desired value is set,
The described calculating of step B AGC adjustment increment is poor for maximum RSSI value in this measurement frequency and RSSI desired value.
3, method according to claim 2 is characterized in that, described RSSI desired value can be configured such that the RSSI value is unsaturated and make the RSSI value have the arbitrary value of default number of significant digit.
4, method according to claim 3 is characterized in that, described RSSI desired value is 0dB.
5, method according to claim 1 is characterized in that, described AGC initial yield value can be configured such that the undersaturated arbitrary value of maximum RSSI value.
6, method according to claim 5 is characterized in that, described AGC initial yield value is 40dB.
7, method according to claim 1 is characterized in that, in step B, the RSSI value of measuring frequency in the full frequency band is: measure the RSSI value of all frequencies in the full frequency band, or the RSSI value of frequency uniformly-spaced in the measurement full frequency band.
8, a kind of device of whole channel primary searching is arranged in portable terminal, it is characterized in that, this device (20) comprises radio-frequency module (21), measures order module (22), control module (23) and cell search module (24), wherein,
Radio-frequency module (21) receives radio frequency signal by the antenna of portable terminal, and exports radiofrequency signal to measurement order module (22);
Measure the radiofrequency signal that order module (22) received RF module (21) transmits, measure the RSSI value of frequency in the full frequency band, adopt current AGC yield value that all detected RSSI values are adjusted, and calculate the AGC value according to all adjusted RSSI values of gain and adjust increment, RSSI value to frequency in the full frequency band sorts, according to ranking results the priority of each frequency is set, and will sort and the priority result export cell search module (24) to;
Cell search module (24) is carried out Cell searching according to the ordering and the priority result that measure order module (22) output;
Control module (23) is provided with the radio frequency carrier frequency of radio-frequency module (21) and measures the AGC initial yield value of order module (22);
When measuring AGC value that order module (22) calculates and adjust the absolute value of increment and adjust thresholding, send the ordering index signal to measurement order module (22) less than the AGC gain that is provided with;
When the absolute value of AGC adjustment increment is not less than the AGC gain adjustment thresholding of setting, the AGC of current AGC yield value and calculating is adjusted the increment sum as new AGC yield value, if new AGC yield value exceeds the maximum range of AGC, then send the ordering index signal to measuring order module (22), otherwise, new AGC yield value as current AGC yield value, and is sent the measurement index signal to measuring order module (22).
9, device according to claim 8 is characterized in that, described measurement order module (22) comprises rssi measurement unit (221), AGC incremental computations unit (222) and RSSI sequencing unit (223),
Rssi measurement unit (221) receives the measurement index signal of control unit (23), the RSSI value of frequency in the full frequency band is measured, and with result transmission to AGC incremental computations unit (222);
The measurement result that AGC incremental computations unit (222) transmits according to rssi measurement unit (221) is calculated AGC value and is adjusted increment, and the AGC value adjustment increment that will calculate gained exports control device (23) to;
RSSI sequencing unit (223) receives the ordering index signal of control module (23), the RSSI value of frequency sorts in the full frequency band that rssi measurement unit (221) are sent, according to ranking results the priority of each frequency is set, will sorts then and the priority result exports cell search module (24) to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100643098A CN100459793C (en) | 2005-04-13 | 2005-04-13 | Method and apparatus for whole channel primary searching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100643098A CN100459793C (en) | 2005-04-13 | 2005-04-13 | Method and apparatus for whole channel primary searching |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1848998A CN1848998A (en) | 2006-10-18 |
| CN100459793C true CN100459793C (en) | 2009-02-04 |
Family
ID=37078317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100643098A Active CN100459793C (en) | 2005-04-13 | 2005-04-13 | Method and apparatus for whole channel primary searching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100459793C (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101304271B (en) * | 2007-05-11 | 2012-02-01 | 展讯通信（上海）有限公司 | Quick AGC calibration method for TD-SCDMA |
| CN101102121B (en) * | 2007-06-14 | 2011-10-05 | 重庆重邮信科通信技术有限公司 | Full frequency band frequency point scanning method of time-division-synchronization code multi-address division system |
| CN101494886B (en) * | 2008-01-21 | 2010-09-29 | 联芯科技有限公司 | Method and apparatus for implementing frequency points ordering under GSM/GPRS connection mode |
| CN101610565B (en) * | 2009-06-26 | 2011-11-09 | 北京天碁科技有限公司 | Method and device for searching public land mobile network |
| CN101657003B (en) * | 2009-08-07 | 2011-12-21 | 华为终端有限公司 | Method for searching subdistrict and mobile terminal thereof |
| CN102256282B (en) | 2010-05-19 | 2014-08-13 | 中兴通讯股份有限公司 | Method, device and mobile terminal for quickly sweeping frequency of mobile terminal |
| CN102026342B (en) * | 2010-11-27 | 2013-08-07 | 华为终端有限公司 | WCDMA (wideband code division multiple access) cell search method and device |
| US8543111B2 (en) * | 2011-04-11 | 2013-09-24 | Renesas Mobile Corporation | Control of cell search procedure |
| CN102905346B (en) * | 2011-07-27 | 2015-08-26 | 联芯科技有限公司 | The method and system that fast cell is selected is realized in wireless communication system |
| CN106332228A (en) * | 2015-06-16 | 2017-01-11 | 联芯科技有限公司 | Frequency sweeping method and device according to frequency band |
| CN105657786B (en) * | 2016-01-20 | 2019-05-28 | 华为技术有限公司 | The method of the adjust gain of user equipment and low-noise amplifier |
| CN107872811B (en) * | 2016-09-28 | 2021-05-28 | 联芯科技有限公司 | Method and device for determining network distribution frequency point |
| CN118250783B (en) * | 2024-05-27 | 2024-08-09 | 山东浪潮数据库技术有限公司 | Cell search AGC method and device in wireless self-organizing network system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6233454B1 (en) * | 1996-10-18 | 2001-05-15 | Matsushita Electric Industrial Co., Ltd. | Mobile station |
| CN1330456A (en) * | 2000-06-23 | 2002-01-09 | 华为技术有限公司 | Automatic gain control (AGC) method for digital base band |
| CN1468021A (en) * | 2002-05-29 | 2004-01-14 | 日本电气株式会社 | High-speed all-band-cell search cellular phone |
| WO2004010719A1 (en) * | 2002-07-24 | 2004-01-29 | Motorola, Inc., A Corporation Of The State Of Delaware | Method and apparatus for acquiring a carrier frequency in a cdma communication system |
-
2005
- 2005-04-13 CN CNB2005100643098A patent/CN100459793C/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6233454B1 (en) * | 1996-10-18 | 2001-05-15 | Matsushita Electric Industrial Co., Ltd. | Mobile station |
| CN1330456A (en) * | 2000-06-23 | 2002-01-09 | 华为技术有限公司 | Automatic gain control (AGC) method for digital base band |
| CN1468021A (en) * | 2002-05-29 | 2004-01-14 | 日本电气株式会社 | High-speed all-band-cell search cellular phone |
| WO2004010719A1 (en) * | 2002-07-24 | 2004-01-29 | Motorola, Inc., A Corporation Of The State Of Delaware | Method and apparatus for acquiring a carrier frequency in a cdma communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1848998A (en) | 2006-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100459793C (en) | Method and apparatus for whole channel primary searching | |
| US5873028A (en) | Transmission power control apparatus and method in a mobile communication system | |
| CN1316753C (en) | System for adjusting gain of mobile station during idle period of serving base station | |
| CN1123264C (en) | Mobile radio system and a method for channel allocation in a mobile radio system | |
| CN1211947C (en) | Mobile station assisted forward link transmission power and data rate control in CDMA system | |
| EP1592269B1 (en) | Power controlling method based on dwpts | |
| US5559790A (en) | Spread spectrum communication system and transmission power control method therefor | |
| CN1148892C (en) | Monitoring of CDMA load and frequency reuse based on reverse link signal-to-noise ratio | |
| CN101192871A (en) | Power control method for reduction of interference between relay systems | |
| CN1280453A (en) | Device and method for measuring reverse link circuit quality in code division multiple access system | |
| US20130185036A1 (en) | Method and apparatus of using drive test data for propagation model calibration | |
| CN101883411A (en) | Rapid frequency scanning method and device for initial cell search | |
| CN2648745Y (en) | Base station using low power interference signal code power to measure | |
| CN101534161A (en) | Method for calibrating transreceiver and device thereof | |
| CN1483254A (en) | Interference power estimation for adaptive antenna system | |
| CN101188445B (en) | An adjusting method and device for pilot channel transmission power | |
| CN1677907B (en) | Method for calibrating a transmitter and a receiver path of a communication device and test system therefor | |
| CN102215510A (en) | Terminal and method for measuring signal by same | |
| CN101207415A (en) | Power control method and apparatus | |
| CN104247276B (en) | For mating device and the method for antenna impedance in a wireless communication system | |
| CN101296002B (en) | Power control method, device and system | |
| CN103002552A (en) | Automatic power control code table acquiring method, automatic power control method and automatic power control device | |
| WO2001031962A1 (en) | Mobile communication terminal and handover control method | |
| CN101159726B (en) | Apparatus and method for quantization in digital communication system | |
| CN104144487B (en) | A kind of receiving channel automatic controlling method for gain and equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: INST OF TELECOMMUNICATION SCIENCE AND TECHNOLGOY Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD. Effective date: 20110620 Free format text: FORMER OWNER: DATANG MOBILE COMMUNICATION EQUIPMENT CO., LTD., SHANGHAI |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100083 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING TO: 100191 NO. 40, XUEYUAN ROAD, HAIDIAN DISTRICT, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110620 Address after: 100191 Haidian District, Xueyuan Road, No. 40, Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100083 No. 40, Haidian District, Beijing, Xueyuan Road Co-patentee before: SHANGHAI DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Patentee before: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee after: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210604 Address after: 100085 1st floor, building 1, yard 5, Shangdi East Road, Haidian District, Beijing Patentee after: DATANG MOBILE COMMUNICATIONS EQUIPMENT Co.,Ltd. Address before: 100191 No. 40, Haidian District, Beijing, Xueyuan Road Patentee before: CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY |