CN107231182A - TD-SCDMA trunk amplifiers and signal synchronisation control means - Google Patents
TD-SCDMA trunk amplifiers and signal synchronisation control means Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
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- H—ELECTRICITY
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Abstract
The invention provides a kind of TD SCDMA trunk amplifiers and signal synchronisation control means, the trunk amplifier includes radio frequency amplifying unit, for receiving the base station signal sent from base station end, detection is carried out to base station signal and is exported by first end to give envelope detection unit, is exported while being amplified to base station signal by the second end；Envelope detection unit, for being sampled to the base station signal after detection, then after comparison threshold output smoothing envelope detection signal；Time quantum, for providing clock signal for synchronous control unit；Synchronous control unit, for integrating envelope rectified signal and clock signal generation synchronous control signal and exporting to radio frequency amplifying unit, the switching of the flow direction of the second end of radio frequency amplifying unit output data is controlled, makes the data flow of trunk amplifier synchronous with the data flow holding of base station end.Trunk amplifier device that the present invention is provided is easily operated, cost is relatively low, be easily achieved, and can be widely applied in TD SCDMA systems.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a TD-SCDMA trunk amplifier and a signal synchronization control method.
Background
The uplink and downlink amplifying circuits of the TD-SCDMA system work in a Time Division Duplex (TDD) mode, and time slot switching points can be flexibly changed according to different service requirements, so that the requirements of uplink and downlink asymmetric services are met. For TD-SCDMA indoor coverage engineering, the traditional method is a mode of introducing "RRU + trunk amplifier", which is used as a signal Repeater (Repeater) in a mobile communication network and simultaneously relays and amplifies uplink and downlink radio frequency signals, and can effectively help an operator to quickly extend macro base station signals to weak signal areas, blind areas or areas with low internet speed and poor user experience in the initial stage of network construction, or to perform accurate indoor extension coverage in the middle and later stages of network construction. However, this has a high requirement for uplink and downlink synchronization of the TD-SCDMA trunk amplifier.
At present, the uplink and downlink synchronous control of the TD-SCDMA trunk amplifier mainly comprises the following steps: the first is a GPS synchronous trunk amplifier, which operates in a synchronous manner with the base station, at the standard time of GPS. Although the GPS synchronous trunk amplifier is easy to realize and has lower cost, when the GPS synchronous trunk amplifier is used on site, the time delay measurement from a signal source signal to equipment needs to be carried out, the transmission time delay from a base station to the equipment is counteracted through manual setting, and the operation is troublesome; another is baseband decoding synchronous trunk amplifier, which correlates the downlink pilot timeslot signal and represents synchronization when a coherent peak occurs. The trunk amplifier directly demodulates to the baseband to obtain the downlink synchronous code, so the trunk amplifier is not easy to be interfered by the outside, but the trunk amplifier has high requirement on the speed of processing the baseband signal, the realization complexity of the equipment circuit is increased, and the cost is improved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the problem of how to provide a trunk amplifier that is easy to operate, easy to implement, and low in cost is solved.
In order to achieve the above object, the present invention provides a TD-SCDMA trunk amplifier and a signal synchronization control method.
According to a first aspect of the present invention, there is provided a TD-SCDMA trunk amplifier, comprising: a radio frequency amplifying unit, an envelope detecting unit, a clock unit and a synchronous control unit,
the first end of the radio frequency amplification unit is connected with the input end of the envelope detection unit, the output end of the envelope detection unit and the output end of the clock unit are both connected with the input end of the synchronous control unit, and the output end of the synchronous control unit is connected with the radio frequency amplification unit;
wherein,
the radio frequency amplification unit is used for receiving a base station signal sent from a base station end, one path of the radio frequency amplification unit detects the base station signal and outputs the base station signal to the envelope detection unit, and the other path of the radio frequency amplification unit amplifies and outputs the base station signal;
the envelope detection unit is used for sampling the detected base station signal and outputting a smooth envelope detection signal after comparing a threshold;
the time unit is used for providing a clock signal for the synchronous control unit;
and the synchronous control unit is used for synthesizing the envelope detection signal and the clock signal to generate a synchronous control signal and outputting the synchronous control signal to the radio frequency amplification unit, and controlling the switching of the flow direction of the data output by the radio frequency amplification unit so that the main line amplifier keeps synchronous with the data flow direction of the base station end in the frame.
Preferably, the radio frequency amplification unit comprises a filtering module, a signal coupling module, a radio frequency detection module and a signal amplification module;
the output end of the filtering module is connected with the signal coupling module; one output end of the signal coupling module is connected with the signal amplification module, and the other output end of the signal coupling module is connected with the radio frequency detection module;
wherein,
the filtering module is used for filtering the received base station signals and filtering signals outside a preset working frequency band;
the signal coupling module is used for extracting the filtered base station signal, one path of the signal coupling module is output to the signal amplification module for amplification, and the other path of the signal coupling module is output to the radio frequency detection module;
the radio frequency detection module is used for detecting the extracted base station signal, converting the base station signal into an analog voltage envelope signal and outputting the analog voltage envelope signal to the envelope detection unit;
and the signal amplification module is used for controlling the flow direction of the output data, keeping the flow direction of the output data synchronous with the flow direction of the data at the base station end and amplifying signals corresponding to the flow direction of the data.
Preferably, the signal amplification module comprises a radio frequency switch, an uplink amplification circuit, a downlink amplification circuit and a circulator;
the radio frequency switch is connected with the input ends of the uplink amplifying circuit and the downlink amplifying circuit, and the circulator is connected with the output ends of the uplink amplifying circuit and the downlink amplifying circuit;
the radio frequency switch and the circulator are used for controlling the uplink amplifying circuit to amplify the uplink signal when the data flow direction of the base station end is uplink or controlling the downlink amplifying circuit to amplify the downlink signal when the data flow direction of the base station end is downlink according to the synchronous control signal output by the synchronous control unit.
Preferably, the envelope detection unit comprises a sample holder and a comparator connected in series;
the sampling retainer samples the analog voltage envelope signal output by the radio frequency detection unit, and the comparator filters the peak value of the sampled analog voltage envelope signal to obtain the envelope detection signal.
According to a second aspect of the present invention, there is provided a signal synchronization control method for a TD-SCDMA trunk amplifier, comprising:
the radio frequency amplification unit receives a base station signal sent from a base station end, detects the base station signal, and amplifies and outputs the base station signal;
the envelope detection unit samples the detected base station signal and outputs a smooth envelope detection signal after comparing a threshold;
the synchronous control unit synthesizes the envelope detection signal and a clock signal provided by the time unit to generate a synchronous control signal, outputs the synchronous control signal to the radio frequency amplification unit, and controls the switching of the flow direction of the data output by the second end of the radio frequency amplification unit, so that the data flow direction of the trunk amplifier and the data flow direction of the base station end are kept synchronous.
Preferably, the step of the synchronization control unit synthesizing the envelope detection signal and the clock signal to generate the synchronization control signal comprises:
the synchronous control unit captures a special time slot in the envelope detection signal through an internal counting set synchronous window according to the clock signal;
and after the capturing is successful, the synchronous control unit generates a synchronous control signal through internal counting according to the time slot ratio of different data flow directions of the envelope detection signal.
Preferably, the method further comprises:
and the synchronous control unit controls the time slot proportion occupied by the output data of the radio frequency amplification unit in different flow directions through internal counting.
The invention provides a TD-SCDMA trunk amplifier and a signal synchronization control method, wherein the trunk amplifier generates a synchronization control signal through a synchronization control unit, controls the switching of the flow direction of the data output by the second end of a radio frequency amplification unit, and ensures that the data flow direction of the trunk amplifier is synchronous with the data flow direction of a base station end.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic diagram of a trunk amplifier architecture provided by the present invention;
FIG. 2 is a schematic diagram of a specific structure of a trunk amplifier provided in the present invention;
FIG. 3 is a schematic diagram of a base station signal sub-frame structure time slot provided by the present invention;
FIG. 4 is a flow chart of a method for controlling the signal synchronization of a main amplifier provided by the present invention;
fig. 5 is a timing diagram of the internal count of the invention for capturing a special slot using a CPLD.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, the present invention provides a TD-SCDMA trunk amplifier, which includes: a radio frequency amplification unit 1, an envelope detection unit 2, a clock unit 3 and a synchronization control unit 4.
The radio frequency amplification unit 1 is connected with the input end of the envelope detection unit, the output end of the envelope detection unit 2 and the output end of the clock unit 3 are both connected with the input end of the synchronous control unit, and the output end of the synchronous control unit 4 is connected with the radio frequency amplification unit;
the radio frequency amplification unit 1 receives a base station signal sent from a base station end, one path of the radio frequency amplification unit detects the base station signal and outputs the base station signal to the envelope detection unit, and the other path of the radio frequency amplification unit amplifies and outputs the base station signal; the envelope detection unit 2 samples the detected base station signal, and outputs a smooth envelope detection signal after comparing a threshold; the time unit 3 provides a clock signal for the synchronous control unit; the synchronous control unit 4 synthesizes the envelope detection signal and the clock signal to generate a synchronous control signal and outputs the synchronous control signal to the radio frequency amplification unit, and controls the switching of the flow direction of the data output by the radio frequency amplification unit, so that the main line amplifier keeps synchronous with the data flow direction of the base station end in the frame.
Further, fig. 2 shows a specific structure of the TD-SCDMA trunk amplifier provided in the embodiment of the present invention.
The radio frequency amplification unit 1 includes a filtering module 11, a signal coupling module 12, a radio frequency detection module 13, and a signal amplification module 14. The output end of the filtering module 11 is connected with the signal coupling module 12; one output end of the signal coupling module 12 is connected to the rf detection module 13, and the other output end is connected to the signal amplification module 14. The signal amplification module 14 further includes a radio frequency switch 143, an uplink amplification circuit 141, a downlink amplification circuit 142, and a circulator 144; one end of the radio frequency switch 143 is connected to the output end of the signal coupling module 12, and the other end is connected to the input ends of the uplink amplifying circuit 141 and the downlink amplifying circuit 142; one end of the circulator 144 is connected to the output ends of the uplink amplifying circuit 141 and the downlink amplifying circuit 142; the other end outputs a signal to the mobile station. The envelope detection unit 2 comprises a sample holder 21 and a comparator 22 connected in series. The input end of the sample holder 21 is connected with the output end of the radio frequency detection module 13; the output of the comparator 22 and the output of the clock unit 3 are connected to the input of the synchronization control unit 4. The output end of the synchronous control unit 4 is connected to the uplink numerical control attenuator in the uplink amplifying circuit 141 and the downlink numerical control attenuator in the downlink amplifying circuit 142 respectively.
A filtering module 11 of the radio frequency amplification unit 1 receives and filters the base station signal, and filters signals outside a preset working frequency band; the signal coupling module 12 extracts the filtered base station signal, extracts a small part of the signal, outputs one path of the extracted signal to the signal amplification module 14 for amplification, and outputs the other path of the extracted signal to the radio frequency detection module 13; the rf detection module 13 detects the extracted base station signal, captures an rf signal in the most original base station signal, converts the rf signal into an analog voltage envelope signal, and outputs the analog voltage envelope signal to the envelope detection unit 2. The sample holder 21 in the envelope detection unit 2 samples the analog voltage envelope signal output from the radio frequency detection unit 13, and outputs an envelope detection signal after passing through a comparator comparison threshold.
The synchronization control unit 4 generates a synchronization control signal by integrating the envelope detection signal output from the envelope detection unit 2 and the clock signal supplied from the clock unit 3. Specifically, the synchronization control unit 4 sets a synchronization window based on the clock signal, captures a special time slot in the envelope detection signal, and after the capture, the synchronization control unit 4 generates the synchronization control signal by internally counting the time slot ratios in accordance with the different data streams of the envelope detection signal (which also represents the time slot ratios of the different data streams of the base station signal). For example, the ratio of the time slots of the synchronous uplink data flow to the synchronous downlink data flow is 4:2, the synchronous control unit 4 generates a high-low level synchronous control signal according to the ratio of the uplink and the downlink after capturing the special time slot through internal counting. After generating the synchronization control signal, the synchronization control unit 4 outputs the synchronization control signal to the upstream numerical control attenuator in the upstream amplification circuit 141 and the downstream numerical control attenuator in the downstream amplification circuit 142, respectively. The uplink numerical control attenuator and the downlink numerical control attenuator are respectively used for amplifying uplink signals and downlink signals. The radio frequency switch and the circulator in the signal amplification module 14 together form a TDD duplexer, which amplifies the uplink signal when the uplink timeslot of the synchronization control signal is turned on, and amplifies the downlink signal when the downlink timeslot of the synchronization control signal is turned on, so as to keep synchronization with the data flow direction of the base station signal.
Preferably, in order to reduce the cost of the device and make the device easier to implement, the synchronous control unit 4 in the trunk amplifier provided by the invention is implemented based on a programmable logic Circuit (CPLD).
The TD-SCDMA trunk amplifier provided by the embodiment of the invention generates the synchronous control signal through the synchronous control unit, controls the switching of the flow direction of the data output by the second end of the radio frequency amplification unit, ensures the synchronization of the data flow direction of the trunk amplifier and the data flow direction of the base station end, and effectively ensures the synchronism of data transmission in the TD-SCDMA system.
The embodiment of the invention also provides a TD-SCDMA trunk amplifier signal synchronization control method.
First, to facilitate understanding how the signal synchronization control method provided by the present invention processes the base station signal, the following briefly introduces a physical frame structure of the TD-SCDMA system transmission signal.
Fig. 3 shows a specific structure of a physical frame of a TD-SCDMA signal. The TD-SCDMA system defines 4 timeslot types, which are DwPTS (downlink pilot timeslot), UpPTS (uplink pilot timeslot), GP (guard interval), and TS 0-TS 6 (conventional timeslot). The DwPTS and the UpPTS are respectively used for downlink synchronization and uplink synchronization without carrying user data, the GP is used for propagation delay protection in the uplink synchronization establishment process, and the TS 0-TS 6 are used for carrying user data or control information. TS0 is always assigned to the downstream, and TS1 is always assigned to the upstream. The DwPTS is used by the base station to transmit a downlink synchronization code, whose slot length is 96 chips, including a synchronization code length of 64 chips and a 32chip interval before the DwPTS; the UpPTS timeslot is used by the mobile station to send an uplink synchronization code to establish uplink synchronization with the base station, with a timeslot length of 160 chips, including a synchronization code length of 128 chips and a trailing guard of 32 chips after the UpPTS timeslot; GP is a guard interval time slot (75us), the length is 96chip, and it is a guard interval from downlink to uplink at the base station.
The base station signal with the frame structure shown in fig. 3 is sent from the base station, and after a series of processing is performed by the trunk amplifier provided by the present invention, the data communication flow of the trunk amplifier is kept synchronous with the communication flow of the base station, and the specific method steps are shown in fig. 4, and include:
s101, a radio frequency amplification unit receives a base station signal sent from a base station end, detects the base station signal, and amplifies and outputs the base station signal;
specifically, the filtering module in the rf amplifying unit receives a base station signal having a frame structure as shown in fig. 3 and filters the base station signal; the signal coupling module extracts the filtered base station signal, extracts a small part of the signal, and outputs one path of the extracted signal to the signal amplification module to amplify the base station signal; the other path of the signal is output to a radio frequency detection module; the radio frequency detection module performs radio frequency detection on the extracted base station signal, converts the base station signal into an analog voltage envelope signal and outputs the analog voltage envelope signal to the envelope detection unit.
S102, an envelope detection unit samples the detected base station signal and outputs a smooth envelope detection signal after comparing a threshold;
specifically, a sample holder in the envelope detection unit samples the analog voltage envelope signal output by the radio frequency detection unit, and a comparator filters a peak value of the sampled analog voltage envelope signal to obtain an envelope detection signal.
S103, the synchronous control unit synthesizes the envelope detection signal and the clock signal provided by the time unit to generate a synchronous control signal, outputs the synchronous control signal to the radio frequency amplification unit, and controls the switching of the flow direction of the data output by the second end of the radio frequency amplification unit, so that the data flow direction of the trunk amplifier in the frame is kept synchronous with the data flow direction of the base station end.
Specifically, as can be seen from the above description, the GP slot is a guard interval from downlink to uplink at the base station, and in order to synchronize the data flow of the trunk amplifier with the data flow of the base station, the trunk amplifier needs to detect the time domain of the GP slot of the base station signal. Therefore, the synchronization control unit detects the base station signal processed in steps S101 and S102 (i.e., the envelope detection signal output by the envelope detection unit). As shown in fig. 5, two zero power regions are located at two ends of the DwPTS in the subframe structure of the bs signal, the first is the interval between the DwPTS and the TS0 timeslot, the length is 48chip (including the 16chip trailing guard of TS0 and the 32chip interval before the DwPTS), and the second is the GP timeslot, so the GP timeslot can be determined as long as the time domain where the first zero power region is located is detected.
Therefore, according to this feature, the synchronization control unit performs an internal counting for designing a synchronization window with a length of 53 chips by using the time signal provided by the clock unit, and detects the first zero power region (i.e., the interval between the DwPTS slot and the TS0 slot). When the area is detected, the synchronous control unit determines the time domain of the GP time slot through internal counting, and then an uplink and downlink switching signal is designed according to the proportion of the uplink time slot and the downlink time slot in the subframe structure of the base station signal, wherein the synchronous control signal is obtained by switching from the downlink to the uplink at the middle position of the GP time slot. For example, as shown in fig. 5, the ratio of the downlink time slot to the uplink time slot of the base station signal is 4:2, and the synchronization control unit detects the first zero power region through the synchronization window, thereby determining the time domain of the GP time slot. And setting a switching point from downlink to uplink in the middle of the GP time slot, and then setting a switching point from uplink to downlink according to the length of the uplink time slot to obtain the optimal switching signal of high and low levels, namely the synchronous control signal. The synchronous control signal is respectively output to an uplink numerical control attenuator in the uplink amplifying circuit and a downlink numerical control attenuator in the downlink amplifying circuit, so that the signal amplifying unit is controlled to switch the communication flow direction of the output data, and the communication flow direction of the output data and the data communication flow direction of the base station end are kept synchronous.
In summary, the present invention provides a TD-SCDMA trunk amplifier and a signal synchronization control method, where the trunk amplifier generates a synchronization control signal through a synchronization control unit, and controls the switching of the flow direction of the data output from the second end of the rf amplification unit, so as to ensure that the data flow direction of the trunk amplifier is synchronized with the data flow direction of the base station.
It should be noted that in the TD-SCDMA system, different ratios of uplink and downlink timeslots in a signal subframe structure may be many, for example:
the 1 subframe includes 6 downlink timeslots, 1 uplink timeslot and 3 fixed special timeslots (i.e. DwPTS timeslot, GP timeslot and UpPTS timeslot);
the 1 subframe comprises 5 downlink time slots, 2 uplink time slots and 3 fixed special time slots;
the 1 subframe comprises 4 downlink time slots, 3 uplink time slots and 3 fixed special time slots;
the 1 subframe comprises 3 downlink time slots, 4 uplink time slots and 3 fixed special time slots;
the 1 subframe includes 2 downlink timeslots, 5 uplink timeslots and 3 fixed special timeslots.
The TD-SCDMA system meets the uplink and downlink speed requirements of various services required by different operators in different application scenes by setting various subframes with different structures. The trunk amplifier and the signal synchronization control method provided by the invention can also set the same time slot ratio as the base station by adjusting the internal count when the base station is started according to the actual situation so as to ensure the synchronization with the base station signal, thereby being suitable for various service requirements of different operators in different application scenes.
The above embodiments are only for illustrating the invention and are not to be construed as limiting the invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention, therefore, all equivalent technical solutions also belong to the scope of the invention, and the scope of the invention is defined by the claims.
Claims (7)
1. A TD-SCDMA trunk amplifier, comprising: a radio frequency amplifying unit, an envelope detecting unit, a clock unit and a synchronous control unit,
the radio frequency amplification unit is connected with the input end of the envelope detection unit, the output end of the envelope detection unit and the output end of the clock unit are both connected with the input end of the synchronous control unit, and the output end of the synchronous control unit is connected with the radio frequency amplification unit;
wherein,
the radio frequency amplification unit is used for receiving a base station signal sent from a base station end, one path of the radio frequency amplification unit detects the base station signal and outputs the base station signal to the envelope detection unit, and the other path of the radio frequency amplification unit amplifies and outputs the base station signal;
the envelope detection unit is used for sampling the detected base station signal and outputting a smooth envelope detection signal after comparing a threshold;
the time unit is used for providing a clock signal for the synchronous control unit;
and the synchronous control unit is used for synthesizing the envelope detection signal and the clock signal to generate a synchronous control signal and outputting the synchronous control signal to the radio frequency amplification unit, and controlling the switching of the flow direction of the data output by the radio frequency amplification unit so that the main line amplifier keeps synchronous with the data flow direction of the base station end in the frame.
2. The main amplifier of claim 1, wherein the rf amplifying unit comprises a filtering module, a signal coupling module, an rf detecting module, and a signal amplifying module;
the output end of the filtering module is connected with the signal coupling module; one output end of the signal coupling module is connected with the signal amplification module, and the other output end of the signal coupling module is connected with the radio frequency detection module;
wherein,
the filtering module is used for filtering the received base station signals and filtering signals outside a preset working frequency band;
the signal coupling module is used for extracting the filtered base station signal, one path of the signal coupling module is output to the signal amplification module for amplification, and the other path of the signal coupling module is output to the radio frequency detection module;
the radio frequency detection module is used for detecting the extracted base station signal, converting the base station signal into an analog voltage envelope signal and outputting the analog voltage envelope signal to the envelope detection unit;
and the signal amplification module is used for controlling the flow direction of the output data, keeping the flow direction of the output data synchronous with the flow direction of the data at the base station end and amplifying signals corresponding to the flow direction of the data.
3. The trunk amplifier of claim 2, wherein the signal amplification module comprises a radio frequency switch, an upstream amplification circuit, a downstream amplification circuit, and a circulator;
the radio frequency switch is connected with the input ends of the uplink amplifying circuit and the downlink amplifying circuit, and the circulator is connected with the output ends of the uplink amplifying circuit and the downlink amplifying circuit;
the radio frequency switch and the circulator are used for controlling the uplink amplifying circuit to amplify the uplink signal when the data flow direction of the base station end is uplink or controlling the downlink amplifying circuit to amplify the downlink signal when the data flow direction of the base station end is downlink according to the synchronous control signal output by the synchronous control unit.
4. The trunk amplifier of claim 2, wherein the envelope detection unit comprises a sample holder and a comparator in series;
the sampling retainer samples the analog voltage envelope signal output by the radio frequency detection unit, and the comparator filters the peak value of the sampled analog voltage envelope signal to obtain the envelope detection signal.
5. A TD-SCDMA trunk amplifier signal synchronization control method is characterized in that the method comprises the following steps:
the radio frequency amplification unit receives a base station signal sent from a base station end, detects the base station signal, and amplifies and outputs the base station signal;
the envelope detection unit samples the detected base station signal and outputs a smooth envelope detection signal after comparing a threshold;
the synchronous control unit synthesizes the envelope detection signal and a clock signal provided by the time unit to generate a synchronous control signal, outputs the synchronous control signal to the radio frequency amplification unit, and controls the switching of the flow direction of the data output by the second end of the radio frequency amplification unit, so that the data flow direction of the trunk amplifier and the data flow direction of the base station end are kept synchronous.
6. The signal synchronization control method according to claim 5, wherein the step of the synchronization control unit synthesizing the envelope detection signal and the clock signal to generate the synchronization control signal comprises:
the synchronous control unit captures a special time slot in the envelope detection signal through an internal counting set synchronous window according to the clock signal;
and after the capturing is successful, the synchronous control unit generates a synchronous control signal through internal counting according to the time slot ratio of different data flow directions of the envelope detection signal.
7. The signal synchronization control method of claim 5, further comprising:
and the synchronous control unit controls the time slot proportion occupied by the output data of the radio frequency amplification unit in different flow directions through internal counting.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113301640A (en) * | 2021-05-17 | 2021-08-24 | 深圳凡维泰科技服务有限公司 | TDD synchronizer for 4G/5G |
| CN115412142A (en) * | 2021-05-28 | 2022-11-29 | 维沃移动通信有限公司 | Processing method, device, equipment and readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1889387A (en) * | 2006-07-14 | 2007-01-03 | 京信通信技术(广州)有限公司 | Correlated detection synchronous module of time division synchronous code division multiple access covering system |
| CN1897747A (en) * | 2006-06-23 | 2007-01-17 | 京信通信技术(广州)有限公司 | Uplink and downlink self-adaptive switching method of time-division synchronous CDMA digital optical fiber direct station |
| CN101150339A (en) * | 2007-10-16 | 2008-03-26 | 福建三元达通讯有限公司 | A TD-SCDMA trunk amplifier using network modulation synchronization mode |
| CN201409129Y (en) * | 2009-03-31 | 2010-02-17 | 奥维通信股份有限公司 | TD-SCDMA trunk amplifier synchronic acquisition system |
-
2016
- 2016-03-24 CN CN201610174077.XA patent/CN107231182A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897747A (en) * | 2006-06-23 | 2007-01-17 | 京信通信技术(广州)有限公司 | Uplink and downlink self-adaptive switching method of time-division synchronous CDMA digital optical fiber direct station |
| CN1889387A (en) * | 2006-07-14 | 2007-01-03 | 京信通信技术(广州)有限公司 | Correlated detection synchronous module of time division synchronous code division multiple access covering system |
| CN101150339A (en) * | 2007-10-16 | 2008-03-26 | 福建三元达通讯有限公司 | A TD-SCDMA trunk amplifier using network modulation synchronization mode |
| CN201409129Y (en) * | 2009-03-31 | 2010-02-17 | 奥维通信股份有限公司 | TD-SCDMA trunk amplifier synchronic acquisition system |
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| CN113301640A (en) * | 2021-05-17 | 2021-08-24 | 深圳凡维泰科技服务有限公司 | TDD synchronizer for 4G/5G |
| CN115412142A (en) * | 2021-05-28 | 2022-11-29 | 维沃移动通信有限公司 | Processing method, device, equipment and readable storage medium |
| WO2022247780A1 (en) * | 2021-05-28 | 2022-12-01 | 维沃移动通信有限公司 | Processing method and apparatus, device, and readable storage medium |
| CN115412142B (en) * | 2021-05-28 | 2024-03-01 | 维沃移动通信有限公司 | Processing method, processing device, processing equipment and readable storage medium |
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