CN1829125A - Wireless device and its electric field grade threshold setting method - Google Patents
Wireless device and its electric field grade threshold setting method Download PDFInfo
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- CN1829125A CN1829125A CN 200610009551 CN200610009551A CN1829125A CN 1829125 A CN1829125 A CN 1829125A CN 200610009551 CN200610009551 CN 200610009551 CN 200610009551 A CN200610009551 A CN 200610009551A CN 1829125 A CN1829125 A CN 1829125A
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Abstract
The invention provide a kind of wireless device that can predicate descending control signal that efficient selecting and receiving high grade electric field signals from several wireless base station by threshold value, include electric field grade detection unit (2) that can detect the receiving electric field grade of the receiving signals by wireless receiving; electric field grade threshold value predicating unit (3) that use the electric field grade to predicate the detection receiving electric field grade that showing above; demodulation unit (5) that can accomplish the demodulation treatment for the receiving signals according to the result of threshold value predicating; electric field grade threshold value calculation unit (4) that calculate the electric field grade threshold value according to the detection receiving electric field grade and renew electric field grade threshold value that used by electric field grade threshold value predicating unit (3).
Description
Technical field
The present invention relates to wireless device and electric field grade (level) threshold setting method thereof in the mobile communication system etc. of a kind of TDMA of being applied to mode etc.
Background technology
As one of communication mode of in the past mobile communication system, known following mode: constitute between radio zone between wireless base station and the radio mobile station by the time division multiplexing transmission path, and implement TDMA (the Time Division MultipleAccess: division multiplex access) mode of exchange of the communication data of control data and sound etc.In the TDMA mode, send downgoing control signal (towards the control signal of radio mobile station) with period demand via same wireless channel respectively from a plurality of wireless base stations, each radio mobile station is via the downgoing control signal of same wireless channel reception from above-mentioned a plurality of wireless base stations.Then, radio mobile station from from behind the signal that the selective reception electric field grade is high the downgoing control signal of a plurality of wireless base stations, implements to establish synchronously action.For example special opening in the prior art of being put down in writing in the flat 8-182041 communique, radio mobile station is set the judgement that electric field grade threshold implements to receive the high signal of electric field grade, for example, set lower electric field grade threshold at the beginning, set high electric field grade threshold afterwards.
Yet, in the above-mentioned prior art, and the concrete decision method of unexposed electric field grade threshold, the problem of existence is: for the judgement this point of implementing the higher signal of reception electric field grade efficiently, technical ripe not enough.For example, though will be judged to be effectively as the downgoing control signal from the wireless base station of at the beginning electric field grade threshold, but, can be effective not necessarily just probably with receiving the higher signal determining of electric field grade as long as the electric field grade threshold that uses is the high value of value than at the beginning in the ensuing judgement.As concrete example, for example, even reception electric field grade at the downgoing control signal that receives for the 2nd time, under the little situation of the reception electric field grade of the downgoing control signal that receives at the beginning, if the 2nd time electric field grade threshold ratio electric field grade threshold height at the beginning, and littler than the reception electric field grade of both sides' downgoing control signal, then the downgoing control signal that receives for the 2nd time is judged as effectively.Consequently, can receive the little side's of electric field grade signal by situation about in establishing synchronously, using.
In addition, consideration is from the situation (with reference to special Fig. 3 that opens flat 8-182041 communique) of the downgoing control signal repetition of 2 wireless base stations.At this moment, use electric field grade threshold at the beginning that downgoing control signal (31) is judged to be effectively, next use higher electric field grade threshold that ensuing downgoing control signal (32) is judged to be effectively.But, in during the repetition of two downgoing control signals (31), (32), CIR (Carrier to Interference Ratio: the carrier wave interference Bob) lower, may fail by the synchronous establishment action of the downgoing control signal (32) that use reception electric field grade should be higher.
Summary of the invention
The present invention, propose in view of the above problems just, its purpose is: a kind of wireless device and electric field grade threshold setting method thereof are provided, can passing threshold judge from from the high signal of selective reception electric field grade efficiently among the downgoing control signal of a plurality of wireless base stations.
In order to solve above-mentioned problem, the wireless device among the present invention is characterized in that, possesses: receive electric field grade testing agency, the reception electric field grade of the received signal that receives is detected; Threshold determination mechanism is with the above-mentioned detected reception electric field grade of electric field grade threshold determination; The recipient processor structure according to the result of described judgement, under the reception electric field grade of the downgoing control signal situation higher than electric field grade threshold, is established based on this downgoing control signal synchronously; And the electric field grade threshold calculation mechanism calculates electric field grade threshold according to described detected reception electric field grade, and upgrades the employed electric field grade threshold of described threshold determination mechanism.
Wireless device among the present invention is characterized in that: described electric field grade threshold calculation mechanism, the value after the grade point that makes described detected reception electric field grade increased is as electric field grade threshold.
Wireless device among the present invention is characterized in that: the increment size of the pairing grade of described reception electric field grade, and for going up the suitable value of carrier-in-interference Bob of the no problem error rate with guaranteeing practicality.
Wireless device among the present invention is characterized in that: described electric field grade threshold calculation mechanism is under the described detected reception electric field grade situation higher than electric field grade threshold in the result of described threshold determination, and electric field grade threshold is implemented to upgrade.
Wireless device among the present invention, it is characterized in that: described recipient processor structure is to separate regulating mechanism, its bit synchronization of using described received signal to have signal and the described bit synchronization follow-up frame synchronization signal of signal, implement synchronous establishment, the electric field grade threshold calculation mechanism, detect described bit synchronization with signal after, begin to calculate electric field grade threshold.
Wireless device among the present invention, it is characterized in that: described recipient processor structure is to separate regulating mechanism, its bit synchronization of using described received signal to have signal and the described bit synchronization follow-up frame synchronization signal of signal, implement synchronous establishment, the electric field grade threshold calculation mechanism, detect described frame synchronization with signal after, begin to calculate electric field grade threshold.
Wireless device among the present invention is characterized in that: the described regulating mechanism of separating, under the described detected reception electric field grade situation higher, described synchronizing signal is implemented to detect again than electric field grade threshold.
Electric field grade threshold setting method among the present invention, it is the electric field grade threshold setting method in the wireless device, this wireless device uses electric field grade threshold to judge the reception electric field grade of the received signal that wireless receiving arrives, and comprising: to wireless receiving to the process that detects of the reception electric field grade of received signal; According to described detected reception electric field grade, calculate the process of electric field grade threshold; And, with this electric field grade threshold that calculates, upgrade the process of the electric field grade threshold that uses in the described judgement.
Electric field grade threshold setting method among the present invention is characterized in that: in calculating the process of described electric field grade threshold, the value after the grade point that makes described detected reception electric field grade increased is as electric field grade threshold.
Electric field grade threshold setting method among the present invention is characterized in that: the increment size of the pairing grade of described reception electric field grade, and for going up the suitable value of carrier-in-interference Bob of the no problem error rate with guaranteeing practicality.
Electric field grade threshold setting method among the present invention, it is characterized in that: in the process of calculating described electric field grade threshold, result at described threshold determination is under the described detected reception electric field grade situation higher than electric field grade threshold, and electric field grade threshold is implemented to upgrade.
Electric field grade threshold setting method among the present invention, it is characterized in that: described wireless device, the bit synchronization of using described received signal to have signal and the described bit synchronization follow-up frame synchronization signal of signal, implement synchronous establishment, in the process of calculating described electric field grade threshold, detect described bit synchronization with signal after, begin to calculate electric field grade threshold.
Electric field grade threshold setting method among the present invention, it is characterized in that: described wireless device, the bit synchronization of using described received signal to have signal and the described bit synchronization follow-up frame synchronization signal of signal, implement synchronous establishment, in the process of calculating described electric field grade threshold, detect described frame synchronization with signal after, begin to calculate electric field grade threshold.
Electric field grade threshold setting method among the present invention is characterized in that: described wireless device, under the described detected reception electric field grade situation higher, described synchronizing signal is implemented to detect again than electric field grade threshold.
By the present invention, since according to wireless receiving to the reception electric field grade of received signal calculate electric field grade threshold, and judge the validity of received signal according to the result of the threshold determination that uses this electric field grade threshold, therefore can passing threshold judge efficiently from from the high signal of selective reception electric field grade among the downgoing control signal of a plurality of wireless base stations.
Description of drawings
Fig. 1 is the block diagram of structure of the receiving system of the radio mobile station 10 of expression in an embodiment of the invention.
Fig. 2 is the block diagram of a configuration example of expression mobile communication system.
Fig. 3 is the structure chart of downgoing control signal.
Fig. 4 is the sequential chart that is used to illustrate the action of radio mobile station shown in Figure 1 10.
Fig. 5 is the process chart of radio mobile station 10 shown in Figure 1.
Among the figure: 1-receives RF portion, 2-electric field grade test section, 3-electric field grade threshold detection unit, 4-field grade threshold value calculation unit, 5-demodulation section, 6-control part, 10-radio mobile station, 11-1～n-wireless base station.
Embodiment
Below, with reference to accompanying drawing an embodiment of the invention are described.
Fig. 1 is the block diagram of structure of the receiving system of the radio mobile station 10 of expression in relevant an embodiment of the invention.Radio mobile station shown in Figure 1 (below, abbreviate " travelling carriage " as) 10, it is the travelling carriage of the mobile communication system of this TDMA mode shown in Figure 2, by the same wireless channel that constitutes by the time division multiplexing transmission path, reception from a plurality of wireless base station 11-1,2,3,4 ..., n downgoing control signal, and the high signal of selective reception electric field grade implements to establish synchronously action among these downgoing control signals, and receives the control information from the wireless base station.
The configuration example of expression downgoing control signal among Fig. 3.Downgoing control signal shown in Figure 3 is made of with signal 22, data-signal 23 and error detection signal 24 with signal 21, frame synchronization bit synchronization, has given bit length respectively.In addition, among Fig. 2, control station 12 is accommodated a plurality of wireless base stations (below, abbreviate " base station " as) 11-1～n.
Among Fig. 1, receive RF portion 1, receive given wireless channel.Electric field grade test section 2 is to being detected by the reception electric field grade that receives the received signal that RF portion 1 receives.Electric field grade threshold detection unit 3 to carrying out threshold determination by electric field grade test section 2 detected reception electric field grades, and receiving under the electric field grade situation higher than electric field grade threshold, is exported to control part 6 with decision signal with electric field grade threshold.
Field grade threshold value calculation unit 4, according to calculating electric field grade threshold by electric field grade test section 2 detected reception electric field grades, and with electric field grade threshold setting in electric field grade threshold detection unit 3.
Next, with reference to Fig. 4, the setting of the electric field grade threshold in the travelling carriage 10 of relevant present embodiment action is described.Fig. 4 is the sequential chart that is used to illustrate the action of travelling carriage shown in Figure 1 10.
Among Fig. 4, (a) expression is from the downgoing control signal 31 of base station 11-1, (b) expression is from the downgoing control signal 32 of base station 11-2, (c) expression is from the downgoing control signal 33 of base station 11-3, (d) expression is from the downgoing control signal 34 of base station 11-4, (e) the reception electric field grade 41 of the received signal that received by travelling carriage 10 of expression.As shown in Figure 4, downgoing control signal 31 is sent from base station 11-1, and downgoing control signal 32 is sent from base station 11-2 slightly late, and downgoing control signal 33 is sent from base station 11-3 slightly late again, and downgoing control signal 34 is sent from base station 11-4 slightly late again.Consequently, during having that downgoing control signal repeats.
At first, receiving under the initial condition, in the electric field grade threshold detection unit 3, do not setting electric field grade threshold (t1 constantly).Therefore, electric field grade threshold detection unit 3 does not carry out threshold determination.
Then, the downgoing control signal 31 that sends from base station 11-1 is received RF portion 1 and receives (t2 constantly).This receives electric field grade, is detected by electric field grade test section 2, exports to field grade threshold value calculation unit 4.Field grade threshold value calculation unit 4 after adding upper threshold value increment α (set-point) on this reception electric field grade, calculates electric field grade threshold Th1.Then, the electric field grade threshold Th1 that this is calculated is set in the electric field grade threshold detection unit 3.In addition, in the time of reception from the first downgoing control signal that receives initial condition, demodulation section 5 uses this first downgoing control signal 31 to begin establishment synchronously and moves.
Then, the downgoing control signal 32 that sends from base station 11-2 is received RF portion 1 and receives (t3 constantly).At this moment, electric field grade threshold detection unit 3, the threshold determination of electric field grade threshold Th1 is used in enforcement.Here, electric field grade threshold Th1, than the reception electric field grade height of the downgoing control signal 31 that received just now threshold value increment α.Thereby the reception electric field grade of downgoing control signal 32 exceeded situation more than the threshold value increment α than the reception electric field grade of downgoing control signal 31 under, threshold determination was qualified.In the example of Fig. 4, because the reception electric field grade of downgoing control signal 32, the reception electric field grade than downgoing control signal 31 does not exceed more than the threshold value increment α, so threshold determination is defective.Therefore, from electric field grade threshold detection unit 3 output decision signals, control part 6 former states do not continue the action of demodulation section 5.So-called qualified referring to, under the reception electric field grade that is judged to be downgoing control signal by the threshold determination processing situation higher than electric field grade threshold, adopt this downgoing control signal, and the recipient processor structure is established synchronously according to the downgoing control signal of this employing.So-called defective referring to, under the reception electric field grade that is judged to be downgoing control signal by the threshold determination processing situation high unlike electric field grade threshold, the recipient processor structure is not established synchronously according to this downgoing control signal.
Next, the downgoing control signal 33 that sends from base station 11-3 is received RF portion 1 and receives (t4 constantly).The reception electric field grade of this downgoing control signal 33 exceeds more than the threshold value increment α than the reception electric field grade of downgoing control signal 31.Thereby it is qualified using the result of the threshold determination of electric field grade threshold Th1, electric field grade threshold detection unit 3 output decision signals.Control part 6 according to this decision signal, is restarted signal to demodulation section 5 outputs.Demodulation section 5 is restarted signal according to this, uses the downgoing control signal 33 from base station 11-3 to restart to establish synchronously action.So-called qualified referring to, under the reception electric field grade that is judged to be downgoing control signal by the threshold determination processing situation higher than electric field grade threshold, adopt this downgoing control signal, and the recipient processor structure is established synchronously according to the downgoing control signal of this employing.
In addition, control part 6, according to the decision signal from electric field grade threshold detection unit 3, index signal is calculated in 4 outputs to field grade threshold value calculation unit, comes indicating gage to calculate electric field grade threshold.Field grade threshold value calculation unit 4 is calculated index signal according to this, this time adds upper threshold value increment α on the reception electric field grade of downgoing control signal 33, calculates electric field grade threshold Th2.Then, Th2 is set in the electric field grade threshold detection unit 3 with this electric field grade threshold, upgrades electric field grade threshold.
Next, the downgoing control signal 34 that sends from base station 11-4 is received RF portion 1 and receives (t5 constantly).The reception electric field grade of this downgoing control signal 34 exceeds more than the threshold value increment α than the reception electric field grade of downgoing control signal 33.Thereby it is qualified using the result of the threshold determination of electric field grade threshold Th2, electric field grade threshold detection unit 3 output decision signals.Control part 6 according to this decision signal, is restarted signal to demodulation section 5 outputs.Demodulation section 5 is restarted signal according to this, uses the downgoing control signal 34 from base station 11-4 to restart to establish synchronously action.So-called qualified referring to, under the reception electric field grade that is judged to be downgoing control signal by the threshold determination processing situation higher than electric field grade threshold, adopt this downgoing control signal, and the recipient processor structure is established synchronously according to the downgoing control signal of this employing.
In addition, control part 6, according to decision signal from electric field grade threshold detection unit 3, index signal is calculated in 4 outputs to field grade threshold value calculation unit, and field grade threshold value calculation unit 4, calculate index signal according to this, this time on the reception electric field grade of downgoing control signal 34, add upper threshold value increment α, calculate electric field grade threshold Th3.Then, Th3 is set in the electric field grade threshold detection unit 3 with this electric field grade threshold, upgrades electric field grade threshold.
Next, the reception that the downgoing control signal 34 that sends from base station 11-4 is carried out finishes (t6 constantly).Control part 6, after the reception of end downgoing control signal 34,3 outputs make the invalid invalid signals of electric field grade threshold to the electric field grade threshold detection unit.Electric field grade threshold detection unit 3 according to this invalid signals, is not made as setting with electric field grade threshold.Thereby, turn back to the reception initial condition.
As mentioned above, electric field grade threshold is to add the value that obtains behind the upper threshold value increment α on the reception electric field grade of the downgoing control signal that received just now.Thereby, by using the threshold determination of this electric field grade threshold, can with receive electric field grade than the higher signal determining of the downgoing control signal that received just now for effective, the high downgoing control signal of selective reception electric field grade efficiently.
Below, the determining method of above-mentioned threshold value increment α is described.
Threshold value increment α is stored in the electric field grade calculating part 4 after being predetermined.As the determining method of this threshold value increment α, preferably focus on more efficiently and carry out on the threshold determination.Specifically, the mode with the relation that satisfies (1) formula decides threshold value increment α.
High electric field grade/low electric field grade=the α of reception that receives ... (1)
Here, for α, use the practical no problem CIR that can guarantee the error rate of going up.The value of this α decides according to the environmental condition or the measured value of mobile communication system.
If, then have with the distortion of above-mentioned (1) formula
High electric field grade＞low electric field grade * the α of reception that receives ... (2)
Be out of shape if taken the logarithm in the both sides of (2) formula again, then have
Log (the high electric field grade that receives)＞log (low reception electric field grade * α)
=log (the high electric field grade that receives)＞log (the low electric field grade that receives)+log α
=high electric field grade (the dB that receives; Decibel)＞low electric field grade (the dB)+α (dB) that receives
……(3)
That is to say, the reception electric field grade of the downgoing control signal that received just now as low reception electric field grade (dB), is added the value that obtains behind the upper threshold value increment α (dB), be new electric field grade threshold (dB).If the downgoing control signal of the reception electric field grade higher than this electric field grade threshold (dB) even repeat with the signal that received just now, also can obtain the practical no problem CIR that can guarantee the error rate of going up, thereby guarantee communication quality.Thereby, not only practical no problem, and can select efficiently than receiving the higher downgoing control signal of electric field grade.
Next, with reference to Fig. 5, the reception of the downgoing control signal in the travelling carriage in the present embodiment 10 action is described.Fig. 5 is the process chart of travelling carriage shown in Figure 1 10.
In the travelling carriage 10, after beginning to receive action, the processing of beginning Fig. 5.At first, in step S1, the 5 indication demodulation of 6 pairs of demodulation sections of control part begin, demodulation section 5 beginning demodulation actions thus.In addition, electric field grade test section 2 begins the received signal that is received by reception RF portion 1 is implemented the detection of reception electric field grade.
Then, in step S2, judge to receive and whether finish, do not finish to enter step S3 if receive, if receive the processing that finishes then to finish Fig. 5.
Then, among the step S3, demodulation section 5, the bit synchronization that detects downgoing control signal from received signal is with behind the signal 21, bit synchronization is exported to control part 6 with signal detection signal, control part 6 will calculate index signal and export to field grade threshold value calculation unit 4 according to this bit synchronization signal detection signal.On the other hand, use under the signal 21 nd situations, return above-mentioned steps S2 in bit synchronization.
Then, in step S4, field grade threshold value calculation unit 4, according to calculating index signal from control part 6, threshold value increment α is added to by on the electric field grade test section 2 detected reception electric field grades, calculate electric field grade threshold, and with electric field grade threshold setting in electric field grade threshold detection unit 3.
Then, in step S5, demodulation section 5, the frame synchronization that detects downgoing control signal from received signal is with behind the signal 22, frame synchronization is exported to control part 6 with signal detection signal, and control part 6 receives the ripple finish time (S6) according to this frame synchronization with the signal detection signal decision.In addition, control part 6 is according to this frame synchronization signal detection signal, will judge that commencing signal exports to electric field grade threshold detection unit 3.On the other hand, use under the signal 22 nd situations, return above-mentioned steps S2 in frame synchronization.
Then, in step S7, electric field grade threshold detection unit 3 will be compared by electric field grade test section 2 detected reception electric field grades and electric field grade threshold.Its result, if receive electric field grade one side than electric field grade threshold height (S7 is), then electric field grade threshold detection unit 3 is exported decision signals.Control part 6 is restarted signal according to this decision signal to demodulation section 5 outputs, restarts the synchronous establishment action (returning above-mentioned steps S3) of demodulation section 5.
On the other hand, if receive electric field grade than electric field grade threshold height (S7, not), then among the step S8, control part 6 judges whether to receiving ripple finish time.Consequently,, then enter into step S9, if, then return above-mentioned steps S7 for receiving ripple finish time if receive ripple finish time.
Then, among the step S9, because the reception of downgoing control signal finishes, so control part 6 is to electric field grade threshold detection unit 3 output invalid signals.Electric field grade threshold detection unit 3 according to this invalid signals, is not made as setting with electric field grade threshold.Thereby, return above-mentioned steps S2.
In addition, in the handling process of above-mentioned Fig. 5,, also can after being detected with signal, frame synchronization begin the calculating of electric field grade threshold though after bit synchronization is detected with signal, begin the calculating of electric field grade threshold.Calculate with signal under the situation of electric field grade threshold detecting bit synchronization,, therefore can improve the computational accuracy of threshold value owing to, begin to calculate electric field grade threshold from reception zero hour of downgoing control signal.On the other hand, calculate with signal under the situation of electric field grade threshold detecting frame synchronization,, therefore can obtain to reduce the effect of power consumption owing to shorten the computing interval.
As mentioned above, by present embodiment, according to wireless receiving to the reception electric field grade of received signal calculate electric field grade threshold, and, judge the validity of received signal according to the result of the threshold determination that uses this electric field grade threshold.Thereby, can judge by passing threshold, among downgoing control signal, select efficiently and receive the high signal of electric field grade from a plurality of wireless base stations.
More than, though with reference to accompanying drawing embodiments of the present invention are had been described in detail, concrete structure is not limited to this execution mode, also is included in design alteration of carrying out in the scope that does not break away from purport of the present invention etc.
For example,, be not limited to the TDMA mode, can apply the present invention in the various communications though in the above-mentioned execution mode, be that example is illustrated with the mobile communication system of TDMA mode.
Claims (14)
1. wireless device possesses:
Receive electric field grade testing agency, the reception electric field grade of the received signal that receives is detected;
Threshold determination mechanism is with the above-mentioned detected reception electric field grade of electric field grade threshold determination;
The recipient processor structure according to the result of described judgement, under the reception electric field grade of the downgoing control signal situation higher than electric field grade threshold, is established based on this downgoing control signal synchronously; And,
The electric field grade threshold calculation mechanism calculates electric field grade threshold according to described detected reception electric field grade, and upgrades the employed electric field grade threshold of described threshold determination mechanism.
2. wireless device according to claim 1 is characterized in that:
Described electric field grade threshold calculation mechanism, the value after the grade point that makes described detected reception electric field grade increased is as electric field grade threshold.
3. wireless device according to claim 2 is characterized in that:
The increment size of the pairing grade of described reception electric field grade is for going up the suitable value of carrier-in-interference Bob of the no problem error rate with guaranteeing practicality.
4. wireless device according to claim 1 is characterized in that:
Described electric field grade threshold calculation mechanism is under the described detected reception electric field grade situation higher than electric field grade threshold in the result of described threshold determination, and electric field grade threshold is implemented to upgrade.
5. wireless device according to claim 1 is characterized in that:
Described recipient processor structure is to separate regulating mechanism, and its bit synchronization of using described received signal to have uses signal and described bit synchronization with the follow-up frame synchronization signal of signal, implements synchronous establishment,
The electric field grade threshold calculation mechanism, detect described bit synchronization with signal after, begin to calculate electric field grade threshold.
6. wireless device according to claim 1 is characterized in that:
Described recipient processor structure is to separate regulating mechanism, and its bit synchronization of using described received signal to have uses signal and described bit synchronization with the follow-up frame synchronization signal of signal, implements synchronous establishment,
The electric field grade threshold calculation mechanism, detect described frame synchronization with signal after, begin to calculate electric field grade threshold.
7. wireless device according to claim 5 is characterized in that:
The described regulating mechanism of separating under the described detected reception electric field grade situation higher than electric field grade threshold, is implemented to detect again to described synchronizing signal.
8. an electric field grade threshold setting method is the electric field grade threshold setting method in the wireless device, and this wireless device uses electric field grade threshold to judge the reception electric field grade of the received signal that wireless receiving arrives, and comprising:
To wireless receiving to the process that detects of the reception electric field grade of received signal;
According to described detected reception electric field grade, calculate the process of electric field grade threshold; And,
With this electric field grade threshold that calculates, upgrade the process of the electric field grade threshold that uses in the described judgement.
9. electric field grade threshold setting method according to claim 8 is characterized in that:
In calculating the process of described electric field grade threshold, the value after the grade point that makes described detected reception electric field grade increased is as electric field grade threshold.
10. electric field grade threshold setting method according to claim 9 is characterized in that:
The increment size of the pairing grade of described reception electric field grade is for going up the suitable value of carrier-in-interference Bob of the no problem error rate with guaranteeing practicality.
11. electric field grade threshold setting method according to claim 8 is characterized in that:
In calculating the process of described electric field grade threshold, be under the described detected reception electric field grade situation higher in the result of described threshold determination than electric field grade threshold, electric field grade threshold is implemented renewal.
12. electric field grade threshold setting method according to claim 8 is characterized in that:
Described wireless device, the bit synchronization of using described received signal to have use signal and described bit synchronization with the follow-up frame synchronization signal of signal, implement synchronous establishment,
In calculating the process of described electric field grade threshold, detect described bit synchronization with signal after, begin to calculate electric field grade threshold.
13. electric field grade threshold setting method according to claim 8 is characterized in that:
Described wireless device, the bit synchronization of using described received signal to have use signal and described bit synchronization with the follow-up frame synchronization signal of signal, implement synchronous establishment,
In calculating the process of described electric field grade threshold, detect described frame synchronization with signal after, begin to calculate electric field grade threshold.
14. electric field grade threshold setting method according to claim 12 is characterized in that:
Described wireless device under the described detected reception electric field grade situation higher than electric field grade threshold, is implemented to detect again to described synchronizing signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005055661A JP4689301B2 (en) | 2005-03-01 | 2005-03-01 | Wireless device and electric field level threshold setting method thereof |
| JP2005055661 | 2005-03-01 |
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| CN1829125A true CN1829125A (en) | 2006-09-06 |
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| CN112840389A (en) * | 2018-10-26 | 2021-05-25 | 京瓷株式会社 | Electronic device, control method for electronic device, and control program for electronic device |
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| JP2007013446A (en) * | 2005-06-29 | 2007-01-18 | Nec Electronics Corp | Mobile terminal device, and operation control method thereof |
| JP4831210B2 (en) * | 2009-06-17 | 2011-12-07 | カシオ計算機株式会社 | Wireless communication apparatus, wireless communication method and program |
| JP5954149B2 (en) * | 2012-12-10 | 2016-07-20 | 富士通株式会社 | Terminal and band search method |
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| JP2871634B2 (en) * | 1996-11-25 | 1999-03-17 | 日本電気株式会社 | Burst signal demodulator |
| JP3525828B2 (en) * | 1999-11-01 | 2004-05-10 | 株式会社日立製作所 | Location registration control method and mobile station device using the same |
| JP3608733B2 (en) * | 2001-10-22 | 2005-01-12 | 松下電器産業株式会社 | Wireless device, threshold update method, and threshold update program |
| JP3931093B2 (en) * | 2002-02-14 | 2007-06-13 | 三菱電機株式会社 | COMMUNICATION CONTROL METHOD FOR MOBILE COMMUNICATION DEVICE AND MOBILE COMMUNICATION DEVICE |
| JP2003283378A (en) * | 2002-03-26 | 2003-10-03 | Matsushita Electric Ind Co Ltd | Device and method for synchronization judgment |
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| TWI309929B (en) | 2009-05-11 |
| JP4689301B2 (en) | 2011-05-25 |
| TW200640173A (en) | 2006-11-16 |
| JP2006245741A (en) | 2006-09-14 |
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