CN103051371B - Synchronization method and device of WiMAX (Worldwide Interoperability for Microwave Access) repeater - Google Patents
Synchronization method and device of WiMAX (Worldwide Interoperability for Microwave Access) repeater Download PDFInfo
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- CN103051371B CN103051371B CN201110309486.3A CN201110309486A CN103051371B CN 103051371 B CN103051371 B CN 103051371B CN 201110309486 A CN201110309486 A CN 201110309486A CN 103051371 B CN103051371 B CN 103051371B
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Abstract
The invention discloses a synchronization method of a WiMAX (Worldwide Interoperability for Microwave Access) repeater. The method comprises the steps: conducting power detection on a down link signal to obtain an envelope quantization level; according to the uplink and downlink proportion relation among the envelope quantization level, a preset voltage threshold value and a configured Wimax frame, detecting the synchronization state of the down link signal and the Wimax frame; if yes, acquiring the initial position of an RTG (Receive/Transmit Transition Gap) according to the envelope quantization level; adjusting the initial position of the RTG; obtaining a first radio frequency switch control signal according to the adjusted initial position of the RTG, the advancing amount and lagging amount of a radio frequency switch; and controlling the radio frequency switch according to the first radio frequency switch control signal. The invention further discloses a device of the WiMAX repeater, the synchronization precision of the repeater can be improved, thereby achieving better synchronization property.
Description
Technical field
The present invention relates to Mobile communication direct base station field, be specifically related to a kind of WiMAX (WorldInteroperability for Microwave Access, global intercommunication microwave accesses) repeater synchronous method and device.
Background technology
Because WiMAX have employed the technology identical with 4G, have the transmission rate that larger bandwidth sum is higher, networking is convenient, has very strong competitiveness for some emerging markets and solution last one kilometer access problem.And as a kind of with frequency two-way amplifier, repeater plays great effect in mobile communication system, a kind of low cost, efficiently solution for the weak signal area of wireless coverage, blind area, outlying district, thus the simultaneous techniques of WiMAX mechanism repeater is studied, be that WiMAX considers covering problem, comprehensive networking is significant.
WiMAX Frame comprises Preamble (leading code), FCH (Frame Control Header, frame control head), DL-MAP (Downlink-Map, downlink map), UL-MAP (Uplink-Map, uplink map), DL burst (Uplink burst, downlink burst) and UL-burst (Uplink-burst, uplink burst), TTG (Transmit/Receive Transition Gap, sending/receiving change gap: downlink data is converted to the time slot protection zone of upstream data) and RTG (Receive/Transmit Transition Gap, receive/send converted slot: ascending time slot is transformed into descending time slot protection zone) etc. various piece.
For the WiMAX repeater as trunking, realizing uplink and downlink timeslot switching is exactly realize the seamless amplification of wireless signal and the key of forwarding.
The synchronous method that traditional TDD (Time Division Duplexing, time division duplex) repeater uses: power detection; Traditional power detection method, utilizes the intensity special relationship of Frame power to find time slot switching point.Traditional power detection method, synchronization accuracy is low; Hardware cost is high.
Summary of the invention
The present invention proposes a kind of WiMAX repeater synchronous method, can improve the synchronization accuracy of WiMAX repeater, reduce costs.
A kind of WiMAX repeater synchronous method, comprises step:
(1) power detection is carried out to down link signal, obtain envelope quantization level;
(2) according to the up-downgoing proportionate relationship of the Wimax frame of described envelope quantization level, default voltage threshold and configuration, the synchronous regime of described down link signal and Wimax frame is detected;
(3) if synchronous, then the initial position of RTG is obtained according to described envelope quantization level;
(4) initial position of described RTG is adjusted;
(5) the first radio-frequency (RF) switch control signal is obtained according to the RTG initial position after adjustment, the lead of radio-frequency (RF) switch and hysteresis; Radio-frequency (RF) switch is controlled according to described first radio-frequency (RF) switch control signal.
The present invention, on the basis of conventional power detection synchronizing, adds fine setting mechanism, finely tunes the RTG initial position that conventional power detection obtains; The first radio-frequency (RF) switch control signal is obtained according to the RTG initial position after fine setting, the lead of radio-frequency (RF) switch and hysteresis; Radio-frequency (RF) switch is controlled according to described first radio-frequency (RF) switch control signal; Realize WiMAX repeater synchronous.Compared with traditional power detection synchronous method, present invention adds fine setting mechanism, improve the precision that WiMAX repeater is synchronous, reach better net synchronization capability; In addition, the present invention adopts logical device to realize, and reduces cost.
The invention allows for a kind of WiMAX repeater synchronizer, the synchronization accuracy of WiMAX repeater can be improved, reduce costs.
A kind of WiMAX repeater synchronizer, comprising:
Power detection unit, for carrying out power detection to down link signal, obtains envelope quantization level;
Synchronous detection unit, for the up-downgoing proportionate relationship of the Wimax frame according to described envelope quantization level, default voltage threshold and configuration, detects the synchronous regime of described down link signal and Wimax frame;
First acquiring unit, for according to described synchronous regime, if synchronously, then obtains the initial position of RTG according to described envelope quantization level;
First adjustment unit, for adjusting the initial position of described RTG;
Second acquisition unit, for obtaining the first radio-frequency (RF) switch control signal according to the RTG initial position after adjustment, the lead of radio-frequency (RF) switch and hysteresis;
Control unit, for controlling radio-frequency (RF) switch according to described first radio-frequency (RF) switch control signal.
The present invention, on the basis of conventional power detection synchronizing, adds fine setting mechanism, finely tunes the RTG initial position that conventional power detection obtains; The first radio-frequency (RF) switch control signal is obtained according to the RTG initial position after fine setting, the lead of radio-frequency (RF) switch and hysteresis; Radio-frequency (RF) switch is controlled according to described first radio-frequency (RF) switch control signal; Realize WiMAX repeater synchronous.Compared with traditional power detection synchronous method, present invention adds fine setting mechanism, improve the precision that WiMAX repeater is synchronous, reach better net synchronization capability; In addition, the present invention adopts logical device to realize, and reduces cost.
Accompanying drawing explanation
Fig. 1 is an embodiment flow chart of the inventive method;
Fig. 2 A is the schematic diagram carrying out the fine setting of RTG initial position in the inventive method;
Fig. 2 B is the schematic diagram carrying out the fine setting of switch leading edge position in the inventive method;
Fig. 2 C is the schematic diagram carrying out switch trailing edge fine position in the inventive method;
Fig. 3 is WiMAX frame structure and radio-frequency (RF) switch position relationship schematic diagram;
Fig. 4 is a structural representation of apparatus of the present invention;
Fig. 5 is another structural representation of apparatus of the present invention.
Embodiment
For ease of understanding the present invention, set forth below in conjunction with accompanying drawing.
Please refer to Fig. 1, first introduce a kind of WiMAX repeater synchronous method that the present invention proposes, comprise step:
101, carry out power detection and obtain envelope quantization level;
Power detection is carried out to down link signal, obtains envelope quantization level.
102, detection system synchronous regime;
According to the up-downgoing proportionate relationship of the Wimax frame of envelope quantization level, default voltage threshold and configuration, detect the synchronous regime of down link signal and Wimax frame.
If 103 is synchronous, then obtain the initial position of RTG;
If synchronous, then obtain the initial position of RTG according to envelope quantization level.Be specially, obtain the trailing edge position of now envelope quantization level or the leading edge position initial position as RTG.
104, the initial position of RTG is adjusted;
The initial position of RTG is adjusted.
105, radio-frequency (RF) switch control signal is obtained;
The first radio-frequency (RF) switch control signal is obtained according to the RTG initial position after adjustment, the lead of radio-frequency (RF) switch and hysteresis.
106, radio-frequency (RF) switch is controlled according to radio-frequency (RF) switch control signal.
Radio-frequency (RF) switch is controlled according to the first radio-frequency (RF) switch control signal.
The present invention, on the basis of conventional power detection synchronizing, adds fine setting mechanism, finely tunes the RTG initial position that conventional power detection obtains; The first radio-frequency (RF) switch control signal is obtained according to the RTG initial position after fine setting, the lead of radio-frequency (RF) switch and hysteresis; Radio-frequency (RF) switch is controlled according to the first radio-frequency (RF) switch control signal; Realize WiMAX repeater synchronous.Compared with traditional power detection synchronous method, present invention adds fine setting mechanism, improve the precision that WiMAX repeater is synchronous, reach better net synchronization capability; In addition, the present invention adopts logical device to realize, and reduces cost.
Wherein, 102 steps are specially:
Obtain the envelope quantization level of down link signal; Catch rising edge and the trailing edge of envelope quantization level, calculate the measured length of descending time slot; According to the descending time slot of WiMAX frame and the proportionate relationship of ascending time slot of configuration, calculate the theoretical length of descending time slot;
The difference of the statistics measured length of descending time slot and the theoretical length of descending time slot is less than the number of times of predetermined time period and judges that the rising edge interval of often adjacent 2 envelope quantization levels is whether in default interval; If number of times be less than default number of times and/or often adjacent 2 envelope quantization levels rising edge interval not preset interval in, be then judged to be step-out; If number of times is more than or equal to default number of times and is interposed between in default interval between the rising edge of every adjacent 2 envelope quantization levels, be then judged to be synchronous.
Wherein, that presets is spaced apart a WiMAX frame, and duration is 5MS.
Wherein 104 steps are specially:
Preset range centered by the initial position of RTG is as the first traversal scope; Using the initiating terminal of the first traversal scope as new RTG initial position, within the scope of the first traversal, successively move new RTG initial position with the step value preset; After each movement, the difference of the statistics measured length of descending time slot and the theoretical length of descending time slot is less than the number of times of predetermined time period; Be new RTG initial position with the RTG position corresponding to maximum times of statistics.
As a kind of embodiment, to the process of RTG initial position fine setting, please refer to Fig. 2 A, centered by RTG initial position, determine the traversal scope of RTG.Within the scope of the traversal of RTG, from the high order end of the traversal scope of RTG, after each mobile step value preset, within the regular hour, power detection is carried out to down link signal and obtains actual envelope voltage signal; The envelope voltage signal of reality and the voltage threshold preset are compared, obtains envelope quantization level; Catch rising edge and the trailing edge of envelope quantization level, calculate the measured length of descending time slot; According to the descending time slot of system configuration and the proportionate relationship of ascending time slot, calculate the theoretical length of descending time slot; The difference of the statistics measured length of descending time slot and the theoretical length of descending time slot is less than the number of times of predetermined time period; If this number of times is greater than default numerical value, be then judged to be synchronous; Until complete the traversal of the traversal scope to whole RTG, in the number of times that all previous movement is added up afterwards, RTG position corresponding when number of times corresponding when selecting to be judged as synchronous is maximum is as the initial position of RTG after fine setting.Such as, during certain once travels through, the number of times that the statistics measured length of descending time slot and the difference of the theoretical length of descending time slot are less than predetermined time period is 20; In another traversal, the number of times that the statistics measured length of descending time slot and the difference of the theoretical length of descending time slot are less than predetermined time period is 22, the number of times preset is all be judged to be synchronously after 15,2 traversals, and when selecting number of times to be 22, corresponding RTG position is the RTG initial position after fine setting.
In order to better synchronous effect can be reached, can be further improved after above-mentioned steps 105: respectively the rising edge of switch controlling signal and trailing edge position are finely tuned;
As follows to the trim process of the rising edge of switch controlling signal: the preset range centered by the leading edge position of the first radio-frequency (RF) switch control signal is as the second traversal scope; Using the initiating terminal of the second traversal scope as the leading edge position of the first new radio-frequency (RF) switch control signal, within the scope of the second traversal, successively move the leading edge position of the first radio-frequency (RF) switch control signal with the step value preset; After the leading edge position of each movement first radio-frequency (RF) switch control signal, the difference of the statistics measured length of descending time slot and the theoretical length of descending time slot is less than the number of times of predetermined time period; With the leading edge position that the leading edge position of the radio-frequency (RF) switch signal corresponding to maximum times of statistics is the second radio-frequency (RF) switch control signal;
As the concrete real-time mode of one, to the fine setting of switching signal leading edge position, please refer to Fig. 2 B.Centered by the switching signal leading edge position obtained according to lead and the hysteresis of the RTG initial position after fine setting, radio-frequency (RF) switch signal, determine the traversal scope of switching signal leading edge position; Within the scope of this traversal, from high order end, at every turn with after the step value moving switch signal leading edge position preset, down link signal carries out power detection and obtains actual envelope voltage signal; The envelope voltage signal of reality and the voltage threshold preset are compared, obtains envelope quantization level; Catch rising edge and the trailing edge of envelope quantization level, calculate the measured length of descending time slot; According to the descending time slot of system configuration and the proportionate relationship of ascending time slot, calculate the theoretical length of descending time slot; The difference of the statistics measured length of descending time slot and the theoretical length of descending time slot is less than the number of times of predetermined time period; Until complete the traversal of the traversal scope to whole RTG, after all previous movement, switching signal leading edge position corresponding when number of times corresponding when selecting to be judged as synchronous is maximum is as the switching signal leading edge position after fine setting.
As follows to the trim process of the trailing edge of switch controlling signal: the preset range centered by the trailing edge position of the first radio-frequency (RF) switch control signal is as the 3rd traversal scope; Using the initiating terminal of the 3rd traversal scope as the trailing edge position of the first radio-frequency (RF) switch control signal, within the scope of the 3rd traversal, successively move the trailing edge position of the first radio-frequency (RF) switch control signal with the step value preset; Behind the trailing edge position of each movement first radio-frequency (RF) switch control signal, the difference of the statistics measured length of descending time slot and the theoretical length of descending time slot is less than the number of times of predetermined time period; With the trailing edge position that the trailing edge position of the radio-frequency (RF) switch control signal corresponding to maximum times of statistics is the radio-frequency (RF) switch control signal of second;
As a kind of embodiment, to the fine setting of switching signal trailing edge position, please refer to Fig. 2 C.Centered by the switching signal trailing edge position obtained according to lead and the hysteresis of the RTG initial position after fine setting, radio-frequency (RF) switch signal, determine the traversal scope of switching signal trailing edge position; Within the scope of this traversal, from high order end, at every turn with behind the step value moving switch signal trailing edge position of presetting, down link signal carries out power detection and obtains actual envelope voltage signal; The envelope voltage signal of reality and the voltage threshold preset are compared, obtains envelope quantization level; Catch rising edge and the trailing edge of envelope quantization level, calculate the measured length of descending time slot; According to the descending time slot of system configuration and the proportionate relationship of ascending time slot, calculate the theoretical length of descending time slot; The difference of the statistics measured length of descending time slot and the theoretical length of descending time slot is less than the number of times of predetermined time period; Until complete the traversal of the traversal scope to whole RTG, after all previous movement, switching signal trailing edge position corresponding when number of times corresponding when selecting to be judged as synchronous is maximum is as the switching signal trailing edge position after fine setting.
Then, according to second the leading edge position of radio-frequency (RF) switch control signal and trailing edge Position Control radio-frequency (RF) switch.Open radio-frequency (RF) switch at the leading edge position of the second radio-frequency (RF) switch control signal, close radio-frequency (RF) switch in the trailing edge position of the second radio-frequency (RF) switch control signal.
In trim process, the step value preset in the first traversal scope, the second traversal scope and the 3rd traversal scope can be identical or not identical.
Above-mentioned synchronous method can carry out in the near-end machine of WiMAX repeater and remote termination, WiMAX repeater remote termination and near-end machine synchronous method all fours, difference is that up link also needs the enable control of LNA, down link needs to carry out enable control to power amplifier, to produce except radio-frequency (RF) switch except producing near-end, also need to produce power amplifier enable signal and LNA enable signal, LNA enable signal is consistent with upstream radio-frequency switch, and power amplifier enable switch, downlink radio frequency switch are consistent.For ease of understanding according to the lead of RTG initial position, switching signal and the process of hysteresis determination switching signal rising edge and trailing edge position, please refer to Fig. 3, in a WiMAX frame, being made up of descending time slot DL, TTG, ascending time slot UL and RTG; The leading edge position of downing switch and the trailing edge position of downing switch can be determined according to the original position of the downing switch lead shown in Fig. 3, downing switch hysteresis, RTG; In like manner, according to the lead of upstream switch, hysteresis and RTG original position, leading edge position and the trailing edge position of upstream switch can be determined.This process is prior art, therefore, is no longer described in detail.
Preferably, in order to the adaptive capacity of system can be improved, in a step 101, after first down link signal being decayed by the power attenuation value preset, then power detection is carried out.
In above embodiment, the ascending time slot of the configuration mentioned in step 102 concrete steps and the proportionate relationship of descending time slot are under known WiMAX repeater is operated in the signal environment of which kind of uplink and downlink timeslot ratio relation, pre-configured; Preferably, when not knowing that current WiMAX repeater is operated in the signal environment of which kind of uplink and downlink timeslot ratio relation, in order to realize the uplink and downlink timeslot ratio relation automatically configuring WiMAX repeater, said method is further comprising the steps of:
The ascending time slot of pre-configured various WiMAX and descending time slot proportionate relationship;
Before 102 steps, obtain the envelope characteristic of actual envelope voltage signal, from the ascending time slot and descending time slot proportionate relationship of pre-configured various WiMAX, select ascending time slot and the descending time slot proportionate relationship of corresponding WiMAX according to envelope characteristic;
In 102 steps, according to ascending time slot and the descending time slot proportionate relationship of the WiMAX selected, calculate the theoretical length of descending time slot.
Wherein, the uplink and downlink timeslot ratio relation of WiMAX comprises: the ratio of WiMAX descending time slot length and ascending time slot length is 29 to 18; Or the ratio of WiMAX descending time slot length and ascending time slot length is 35 to 12; Or the ratio of WiMAX descending time slot length and ascending time slot length is 26 to 21.
Preferably, in order to improve the adaptive capacity of repeater, envelope quantization level comprises: Transistor-Transistor Logic level or COMS level.
Below in conjunction with accompanying drawing, introduce apparatus of the present invention, please refer to Fig. 4, a kind of WiMAX repeater synchronizer, comprising:
Power detection unit T1, for carrying out power detection to down link signal, obtains envelope quantization level;
Synchronous detection unit T2, for the up-downgoing proportionate relationship of the Wimax frame according to envelope quantization level, default voltage threshold and configuration, detects the synchronous regime of down link signal and Wimax frame;
First acquiring unit T3, for according to synchronous regime, if synchronously, then obtains the initial position of RTG according to envelope quantization level;
First adjustment unit T4, for adjusting the initial position of RTG;
Second acquisition unit T5, for obtaining the first radio-frequency (RF) switch control signal according to the RTG initial position after adjustment, the lead of radio-frequency (RF) switch and hysteresis;
Control unit T6, for controlling radio-frequency (RF) switch according to the first radio-frequency (RF) switch control signal.
The present invention, on the basis of conventional power detection synchronizing, adds fine setting mechanism, finely tunes the RTG initial position that conventional power detection obtains; The first radio-frequency (RF) switch control signal is obtained according to the RTG initial position after fine setting, the lead of radio-frequency (RF) switch and hysteresis; Radio-frequency (RF) switch is controlled according to the first radio-frequency (RF) switch control signal; Realize WiMAX repeater synchronous.Compared with traditional power detection synchronous method, present invention adds fine setting mechanism, improve the precision that WiMAX repeater is synchronous, reach better net synchronization capability; In addition, the present invention adopts logical device to realize, and reduces cost.
Please refer to Fig. 5, in order to the synchronous effect of system can be made better, to Fig. 4 embodiment, can make further improvements: increase: the second adjustment unit T7 and the 3rd adjustment unit T8;
Second adjustment unit T7, for the preset range centered by the leading edge position of the first radio-frequency (RF) switch control signal as the second traversal scope, using the initiating terminal of the second traversal scope as the leading edge position of the first new radio-frequency (RF) switch control signal, within the scope of the second traversal, successively move the leading edge position of the first radio-frequency (RF) switch control signal with the step value preset; After each movement, the difference of the statistics measured length of descending time slot and the theoretical length of descending time slot is less than the number of times of predetermined time period, obtains the leading edge position of leading edge position as the second radio-frequency (RF) switch control signal of radio-frequency (RF) switch signal corresponding to maximum times;
3rd adjustment unit T8, for the preset range centered by the trailing edge position of the first radio-frequency (RF) switch control signal as the 3rd traversal scope; Using the initiating terminal of the 3rd traversal scope as the trailing edge position of the first new radio-frequency (RF) switch control signal, within the scope of the 3rd traversal, successively move the trailing edge position of the first radio-frequency (RF) switch control signal with the step value preset; After each movement, the difference of the statistics measured length of descending time slot and the theoretical length of descending time slot is less than the number of times of predetermined time period, the trailing edge position of the radio-frequency (RF) switch control signal that acquisition maximum times is corresponding as second the trailing edge position of radio-frequency (RF) switch control signal;
Control unit T6 is according to the leading edge position of the second radio-frequency (RF) switch control signal and trailing edge Position Control radio-frequency (RF) switch.
The present invention is applicable in the optical fiber repeater of WiMAX standard, the covering system such as wireless discharging-directly station and trunk amplifier.
Above embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.
Claims (6)
1. a WiMAX repeater synchronous method, is characterized in that, comprises step:
(1) power detection is carried out to down link signal, obtain envelope quantization level;
(2) according to the up-downgoing proportionate relationship of the Wimax frame of described envelope quantization level, default voltage threshold and configuration, detect the synchronous regime of described down link signal and Wimax frame, particularly, catch rising edge and the trailing edge of described envelope quantization level, calculate the measured length of descending time slot; According to the descending time slot of WiMAX frame and the proportionate relationship of ascending time slot of configuration, calculate the theoretical length of descending time slot; The difference of adding up the measured length of described descending time slot and the theoretical length of described descending time slot is less than the number of times of predetermined time period and judges that the rising edge interval of often adjacent 2 described envelope quantization levels is whether in the interval of presetting; If described number of times be less than default number of times and/or often adjacent 2 described envelope quantization levels rising edge interval not preset interval in, be then judged to be step-out; If described number of times is more than or equal to default number of times and is interposed between in default interval between the rising edge of every adjacent 2 described envelope quantization levels, be then judged to be synchronous;
(3) if synchronous, then the initial position of RTG is obtained according to described envelope quantization level;
(4) adjust the initial position of described RTG, particularly, the preset range centered by the initial position of described RTG is as the first traversal scope; Using the initiating terminal of described first traversal scope as new RTG initial position, within the scope of described first traversal, successively move described new RTG initial position with the step value preset; After each movement, the difference of adding up the measured length of described descending time slot and the theoretical length of described descending time slot is less than the number of times of described predetermined time period; Be new RTG initial position with the RTG position corresponding to maximum times of statistics;
(5) the first radio-frequency (RF) switch control signal is obtained according to the RTG initial position after adjustment, the lead of radio-frequency (RF) switch and hysteresis; Radio-frequency (RF) switch is controlled according to described first radio-frequency (RF) switch control signal.
2. WiMAX repeater according to claim 1 synchronous method, is characterized in that,
After the described lead according to the RTG initial position after adjustment, radio-frequency (RF) switch and hysteresis obtain the step of the first radio-frequency (RF) switch control signal, comprise step:
Preset range centered by the leading edge position of described first radio-frequency (RF) switch control signal is as the second traversal scope; Using the initiating terminal of described second traversal scope as the leading edge position of the first new radio-frequency (RF) switch control signal, within the scope of described second traversal, successively move the leading edge position of described first radio-frequency (RF) switch control signal with the step value preset; After each movement, the difference of adding up the measured length of described descending time slot and the theoretical length of described descending time slot is less than the number of times of described predetermined time period; With the leading edge position that the leading edge position of the radio-frequency (RF) switch signal corresponding to maximum times of statistics is the second radio-frequency (RF) switch control signal;
Preset range centered by the trailing edge position of described first radio-frequency (RF) switch control signal is as the 3rd traversal scope; Using the initiating terminal of described 3rd traversal scope as the trailing edge position of the first new radio-frequency (RF) switch control signal, within the scope of described 3rd traversal, successively move the trailing edge position of described first radio-frequency (RF) switch control signal with the step value preset; After each movement, the difference of adding up the measured length of described descending time slot and the theoretical length of described descending time slot is less than the number of times of described predetermined time period; With the trailing edge position that the trailing edge position of the radio-frequency (RF) switch control signal corresponding to maximum times of statistics is the radio-frequency (RF) switch control signal of second;
When controlling radio-frequency (RF) switch, radio-frequency (RF) switch described in the leading edge position of the radio-frequency (RF) switch control signal according to described second and trailing edge Position Control.
3. WiMAX repeater according to claim 1 synchronous method, is characterized in that,
Before the step of the theoretical length of described calculating descending time slot, the ascending time slot of pre-configured various WiMAX and descending time slot proportionate relationship;
Obtain the envelope characteristic of actual envelope voltage signal, from the ascending time slot and descending time slot proportionate relationship of pre-configured various WiMAX, select ascending time slot and the descending time slot proportionate relationship of corresponding WiMAX according to described envelope characteristic;
When calculating the theoretical length of descending time slot, according to ascending time slot and the descending time slot proportionate relationship of the WiMAX selected, calculate the theoretical length of descending time slot.
4. the WiMAX repeater synchronous method according to any one of claims 1 to 3, is characterized in that,
Described envelope quantization level comprises: Transistor-Transistor Logic level or COMS level.
5. a WiMAX repeater synchronizer, is characterized in that, comprising:
Power detection unit, for carrying out power detection to down link signal, obtains envelope quantization level;
Synchronous detection unit, for the up-downgoing proportionate relationship of the Wimax frame according to described envelope quantization level, default voltage threshold and configuration, detect the synchronous regime of described down link signal and Wimax frame, when described synchronous detection unit synchronously detects, obtain rising edge and the trailing edge of described envelope quantization level, calculate the measured length of descending time slot; According to the descending time slot of WiMAX frame and the proportionate relationship of ascending time slot of configuration, calculate the theoretical length of descending time slot; The difference of adding up the measured length of described descending time slot and the theoretical length of described descending time slot is less than the number of times of predetermined time period and judges that the rising edge interval of often adjacent 2 described envelope quantization levels is whether in the interval of presetting; If described number of times be less than default number of times and/or often adjacent 2 described envelope quantization levels rising edge interval not preset interval in, be then judged to be step-out; If described number of times is more than or equal to default number of times and is interposed between in default interval between the rising edge of every adjacent 2 described envelope quantization levels, be then judged to be synchronous;
First acquiring unit, for according to described synchronous regime, if synchronously, then obtains the initial position of RTG according to described envelope quantization level;
First adjustment unit, for adjusting the initial position of described RTG, when described first adjustment unit adjusts the initial position of described RTG, the preset range centered by the initial position of described RTG is as the first traversal scope; Using the initiating terminal of described first traversal scope as new RTG initial position, within the scope of described first traversal, successively move described new RTG initial position with the step value preset; After each movement, the difference of adding up the measured length of described descending time slot and the theoretical length of described descending time slot is less than the number of times of described predetermined time period; Be new RTG initial position with the RTG position corresponding to maximum times of statistics;
Second acquisition unit, for obtaining the first radio-frequency (RF) switch control signal according to the RTG initial position after adjustment, the lead of radio-frequency (RF) switch and hysteresis;
Control unit, for controlling radio-frequency (RF) switch according to described first radio-frequency (RF) switch control signal.
6. WiMAX repeater according to claim 5 synchronizer, is characterized in that, described WiMAX repeater synchronizer also comprises: the second adjustment unit, the 3rd adjustment unit;
Described second adjustment unit, for the preset range centered by the leading edge position of described first radio-frequency (RF) switch control signal as the second traversal scope, using the initiating terminal of described second traversal scope as the leading edge position of the first new radio-frequency (RF) switch control signal, within the scope of described second traversal, successively move the leading edge position of described first radio-frequency (RF) switch control signal with the step value preset; After each movement, the difference of adding up the measured length of described descending time slot and the theoretical length of described descending time slot is less than the number of times of described predetermined time period, obtains the leading edge position of leading edge position as the second radio-frequency (RF) switch control signal of radio-frequency (RF) switch signal corresponding to maximum times;
Described 3rd adjustment unit, for the preset range centered by the trailing edge position of described first radio-frequency (RF) switch control signal as the 3rd traversal scope; Using the initiating terminal of described 3rd traversal scope as the trailing edge position of the first new radio-frequency (RF) switch control signal, within the scope of described 3rd traversal, successively move the trailing edge position of described first radio-frequency (RF) switch control signal with the step value preset; After each movement, the difference of adding up the measured length of described descending time slot and the theoretical length of described descending time slot is less than the number of times of described predetermined time period, the trailing edge position obtaining radio-frequency (RF) switch control signal corresponding to maximum times as second the trailing edge position of radio-frequency (RF) switch control signal;
When described control unit controls radio-frequency (RF) switch, according to leading edge position and the trailing edge Position Control radio-frequency (RF) switch of described second radio-frequency (RF) switch control signal.
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| CN101636930A (en) * | 2006-03-31 | 2010-01-27 | 高通股份有限公司 | Be used for the enhanced physical layer repeater operated in the WiMAX system |
| CN201601835U (en) * | 2009-09-29 | 2010-10-06 | 福建先创电子有限公司 | Wireless wideband synchronous code division multiple-access repeater synchronizing device |
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| CN101636930A (en) * | 2006-03-31 | 2010-01-27 | 高通股份有限公司 | Be used for the enhanced physical layer repeater operated in the WiMAX system |
| CN201601835U (en) * | 2009-09-29 | 2010-10-06 | 福建先创电子有限公司 | Wireless wideband synchronous code division multiple-access repeater synchronizing device |
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