CN100349389C - Communication signal bidirection amplifier - Google Patents
Communication signal bidirection amplifier Download PDFInfo
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- CN100349389C CN100349389C CNB2004100252297A CN200410025229A CN100349389C CN 100349389 C CN100349389 C CN 100349389C CN B2004100252297 A CNB2004100252297 A CN B2004100252297A CN 200410025229 A CN200410025229 A CN 200410025229A CN 100349389 C CN100349389 C CN 100349389C
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Abstract
The present invention relates to a communication signal bidirectional amplifying device which comprises an uplink receiving branch, a downlink transmitting branch and two circulators which connect the uplink branch and the downlink branch, wherein the uplink receiving branch is formed by connecting an amplifying circuit and a transmit/receive switch which are arranged between the two circulators; the downlink transmitting branch is formed by connecting a voice time slot detecting and controlling circuit, an amplifying circuit and a transmit/receive switch which are arranged between the two circulators; the uplink amplifying circuit and the downlink amplifying circuit are respectively connected with a power supply manager thereof; the voice time slot detecting and controlling circuit detects a transmitting time slot and a receiving time slot and controls the power supply manager and the transmit/receive switch, the power supply and the transmit/receive switch of the uplink receiving branch are closed in the transmitting time slot, and the power supply and the transmit/receive switch of the downlink transmitting branch are closed in the receiving time slot. The present invention has the advantage of accurate synchronization and avoids the problem of the mutual interference of uplink and downlink channels.
Description
Technical field
The present invention relates to the communications field, particularly relevant for the two-way amplifying device of a kind of communication signal.
Background technology
PHS (Personal Access Phone System, the personal radio telephone system) network is as the extension of landline telephone with replenish, make full use of resources such as the switches of operator's free time such as telecommunications and transmission equipment, coverage is generally in certain zone of a local network.Its voice quality can compare favourably with telephone, because the voice quality height, call rate is identical with fixed-line telephone network, and PHS has obtained the support of middle and low income customer group.
Because the PHS system adopts the microcellulor technology, base station power output less usually (maximum 500 milliwatts), PHS works in 1900 megahertz frequency ranges simultaneously, and the signal penetration power is relatively poor, makes many room areas can't receive signal, some problems anxious to be solved occurred.As: a little less than signal under the environment such as the bottom of building, market place builet below the ground, underground parking, PHS mobile phone can't normally be used, and forms the blind area of communication; At intermediate floor, because overlapping from the different base station signal produces " table tennis switches " effect, mobile phone frequently switches, even call drop, has a strong impact on the normal use of mobile phone; High-rise in building, owing to be subjected to the restriction of base station antenna height, can't normally cover, also be the blind area of Personal Handyphone System.In addition, in some building, though mobile phone can normal talking, because user density is big, BTS channel is crowded, the mobile phone difficulty of reaching the standard grade.
How to solve the problem of PHS network signal blind area better, be the current subject matter that faces of operator.Present solution has:
1, independent repeater: the multichannel repeater is provided, and the complete and base station synchronization of frequency and sequential is carried out the full frequency band multichannel and is amplified.Compare wired mode, the engineering problem that a lot of wirings bring has been reduced in the repeater, has saved engineering cost, can also serve as the effect of base station in the abundant place of BTS channel simultaneously, reduces the quantity of base station, the cost of reducing investment outlay.
2, two-way amplifier: two-way amplifier wireless receiving and dispatching signal of base station and two-way amplification, realize indoor covering by two-way amplifier again.This scheme cost is low, and can cover than large tracts of land.
Can such scheme realize, key is that can two-way amplifier realize required function, the stationary problem during particularly two-way time division duplex mode.The working frequency range of China PHS is 1890～1920 megahertzes, working method is two-way time division duplex, that is to say collects mail and post a letter is with frequently, adopt the mode of time-division to realize duplex communication, this is different from GSM (Global System For Mobile Communications fully, global system for mobile communications) and CDMA (Code Division Multiple Access, Code Division Multiple Access (CDMA)) Frequency Division Duplexing (FDD), so realize directly putting to the PHS signal, must obtain the synchronizing signal of base station transceiver conversion, this synchronizing signal requires very accurate, reaches the precision of microsecond level, switches under up amplification and the descending control that is amplified in synchronizing signal.
But the situation of having set up for most of base stations, the cost that replaces the base station with independent repeater is more much bigger than the cost of two-way amplifier wireless receiving and dispatching signal of base station and two-way amplification, and therefore a kind of two-way time division duplex amplifier of directly putting that can satisfy the PHS signal is the preferred plan of dealing with problems.
Existing two-way time division duplex amplifier is accurate inadequately synchronously to signal not only, also exists to interfere with each other and remove problems such as the ability of making an uproar is bad between the up-downgoing passage.
Summary of the invention
The object of the present invention is to provide the two-way amplifying device of a kind of communication signal,, can carry out precise synchronization, satisfied the needs that the mode that adopts the time-division realizes duplex communication signal to overcome above-mentioned the deficiencies in the prior art.
For achieving the above object, the invention provides the two-way amplifying device of a kind of communication signal, comprise up receiving branch, downlink branch road and two circulators that connect the up-downgoing branch road, up receiving branch is formed by connecting by amplifying circuit and the transmit-receive switch between two circulators; The detection of speech time slot and control circuit, amplifying circuit and transmit-receive switch that downlink is propped up between two circulators of route are formed by connecting; Wherein the uplink and downlink amplifying circuit links to each other with its power supervisor respectively; The speech time slot detects and control circuit detects transmission time slot and receiving slot and controls power supervisor and transmit-receive switch, closes the power supply and the transmit-receive switch of up receiving branch at transmission time slot; Close the power supply and the transmit-receive switch of downlink branch road at receiving slot.
Wherein, described up amplifying circuit is connected in sequence by first order low noise amplifier, band pass filter, second level low noise amplifier, what be connected with up power supervisor is first order low noise amplifier and second level low noise amplifier, and the frequency of band pass filter gating is 1890～1920 megahertzes.Also be provided with one in the described up amplifying circuit by manually controlling the gain adjustment level that receives link gain.
Described descending amplifying circuit is connected in sequence by driving power amplifier, band pass filter and main power amplifier, and what be connected with the downlink electrical source manager is the driving power amplifier, and the frequency of band pass filter gating is 1890～1920 megahertzes.The input of descending amplifying circuit also is provided with a voltage-controlled attenuator, purpose is to adjust automatically in order to reach power output, be provided with a feedback circuit between the output of descending amplifying circuit and the voltage-controlled attenuator, feedback circuit makes the size of descending amplifying circuit output be directly proportional with the size of voltage-controlled attenuator attenuation amplitude.Described feedback circuit is connected in sequence by directional coupler, power detector and operational amplifier, and this directional coupler is 30 decibels of directional couplers.Described speech time slot detects and control circuit is connected in sequence by directional coupler, rf detector and NAND gate, and its directional coupler is 20 decibels of directional couplers.Also be provided with one in the descending amplifying circuit by manually controlling the gain adjustment level that receives link gain.
The present invention is a kind of device of realizing the two-way enlarging function of broadband P HS of 1890～1920 megahertzes, and it can carry out low noise to the up received signal of PHS at ascending time slot and amplify; Can carry out the radiofrequency signal of 1 watt of power amplification output at descending time slot to the PHS downstream signal; Can obtain the speech time slot signal to carrying out automatic detection, control the emission of two-way time division duplex mode and the switching of reception by the speech time slot signal from the PHS signal of base station.This device equally also can be applied to the two-way amplification of the other system of two-way time division duplex mode.
Because two-way amplifier is transparent transmission in the signal transmission, does not take control channel, in the area of coverage customer volume is not influenced.Two-way amplifier has adopted coherent detection and difference control technology, makes synchronous error less than 0.5 μ s, has guaranteed that the reliable synchronization of transmitting-receiving has reduced the influence that the descending power amplification receives up low noise simultaneously.
The synchronous settling mode of two-way time division duplex is that can two-way amplifier realize the key factor of up-downgoing enlarging function preferably, the present invention adopts rf detector fast, can be under 40 decibels input Dynamic Signal, guarantee that rise and fall time is less than 0.5 μ s, the detection mode that is better than other fully, reduce synchronous error, improved synchronous reliability.
Reception transmitting branch of the present invention has adopted the mode of power management, has reduced the noise effect of emission to receiving effectively, and the synchronous switching of power management and two-way time division duplex is carried out simultaneously, has guaranteed good net synchronization capability.
Up receiving branch of the present invention has adopted the field effect transistor of ultra-low noise to carry out the amplification of first order low noise, noise factor that can be in application band is less than 1.2 decibels, dispose the isolation that circulator increases the transmitting-receiving branch road in radio-frequency (RF) signal input end simultaneously, guaranteed extraordinary input stationary wave characteristic simultaneously, voltage standing wave ratio is less than 1.2.
Downlink branch road of the present invention adopts the control technology of automatic electric-level control, being controlled on 1 watt the power output of stabilizing output level can be guaranteed the performance requirement of good side channel power ratio simultaneously.
The present invention is equipped with manual level controlled function, and the signal of PHS input also can adopt manual mode that level is controlled in certain input range when large-scope change, is beneficial to two-way amplifier and is connected with the PHS base station of various power models.
Assembly module of the present invention is an independently unit module, and when the PHS wireless system used, directly application can reach the functional requirement of two-way amplification.The present invention has circuit performance preferably, and it has low noise factor and advantages of higher stability, uses function admirable, and is reliable and stable.Another advantage of the present invention is: this assembly module has complete structure, and clear and definite external interface can conveniently use.
The present invention is further illustrated below in conjunction with accompanying drawing and embodiment.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Fig. 2 is the block diagram of one embodiment of the present of invention.
Fig. 3 is the block diagram of speech time slot detection of the present invention and control circuit.
Embodiment
Relevant detailed description of the present invention and technology contents, existing as follows with regard to accompanying drawings: at first consult Fig. 1, Fig. 1 is a theory diagram of the present invention.The two-way amplifying device of communication signal according to the present invention, comprise up receiving branch, downlink branch road and two circulators that connect the up-downgoing branch road, two circulators here have two functions: increase the isolation of transmitting-receiving branch road, guarantee that two signal ports of two-way amplifier have good standing-wave ratio.
Up receiving branch is formed by connecting by amplifying circuit and the transmit-receive switch between two circulators; The detection of speech time slot and control circuit, amplifying circuit and transmit-receive switch that downlink is propped up between two circulators of route are formed by connecting; Detection of speech time slot and control circuit detect transmission time slot and receiving slot and control transmit-receive switch and close up receiving branch at transmission time slot; Close the downlink branch road at receiving slot.Such design has prevented the phase mutual interference between the up-downgoing passage, and it is synchronous to have guaranteed that signal switches.
See also Fig. 2, Fig. 2 is the block diagram of one embodiment of the present of invention.In one embodiment of the invention, up receiving branch is formed by connecting by amplifying circuit and transmit-receive switch between two circulators; Wherein, amplifying circuit is connected in sequence by first order low noise amplifier, band pass filter, second level low noise amplifier, what wherein be connected with up power supervisor is first order low noise amplifier and second level low noise amplifier, and the frequency of band pass filter gating is 1890～1920 megahertzes.First order low noise amplifier has adopted the field effect transistor of ultra-low noise, noise factor that can be in application band is less than 1.2 decibels, dispose the isolation that circulator increases the transmitting-receiving branch road in radio-frequency (RF) signal input end simultaneously, guaranteed extraordinary input stationary wave characteristic simultaneously, voltage standing wave ratio is less than 1.2.Also be provided with one in the described up amplifying circuit by manually controlling the gain adjustment level that receives link gain.
The detection of speech time slot and control circuit, amplifying circuit and transmit-receive switch electrical connection that downlink is propped up between two circulators of route form.Descending amplifying circuit is connected in sequence by driving power amplifier, band pass filter and main power amplifier, and what be connected with the downlink electrical source manager is the driving power amplifier, and the frequency of band pass filter gating is 1890～1920 megahertzes.The input of descending amplifying circuit also is provided with a voltage-controlled attenuator, be provided with a feedback circuit between the output of descending amplifying circuit and the voltage-controlled attenuator, feedback circuit makes the size of descending amplifying circuit output be directly proportional with the size of voltage-controlled attenuator attenuation amplitude.This feedback circuit is connected in sequence by directional coupler, power detector and operational amplifier, and this directional coupler is 30 decibels of directional couplers.
Wherein the uplink and downlink amplifying circuit links to each other with its power supervisor respectively.The speech time slot detects and control circuit detects transmission time slot and receiving slot and controls power supervisor and transmit-receive switch, closes the power supply and the transmit-receive switch of up receiving branch at transmission time slot; Close the power supply and the transmit-receive switch of downlink branch road at receiving slot.The speech time slot detects and control circuit is connected in sequence by directional coupler, rf detector and NAND gate, and its directional coupler is 20 decibels of directional couplers.Rf detector can guarantee that rise and fall time less than 0.5 μ s, is better than other detection mode fully under 40 decibels input Dynamic Signal, reduced synchronous error, has improved synchronous reliability.Also be provided with one in the descending amplifying circuit by manually controlling the gain adjustment level that receives link gain.
Receive the radiofrequency signal of coming from antenna and be input to up receiving branch via circulator, at first entering first order low noise amplifier amplifies, there is lower noise factor in the system of assurance, signal is linked in the band pass filter then, the broadband P HS signal of gating 1890～1920 megahertzes reduces the outer interference of band.Second level low noise amplifier guarantees that receiving system has enough gains, and the power supply of front dual-stage amplifier must carry out power management, only just connects amplifier power supply at receiving slot, thereby prevents the noise jamming of transmitting branch to receiving branch.Gain adjustment level has toggle switch by manual control reception link gain.When the signal of PHS input during at large-scope change, can adopt manual mode that level is controlled in certain input range, this helps two-way amplifier and is connected with the PHS base station of various power models.When the signal that comes as the PHS base station was added to the right-hand member circulator of Fig. 2, this transmit-receive switch was in off state, and all the other times are accepting state.Through behind the switch, the signal of reception is exported to the PHS base station by circulator.
When the PHS base station was connected to the amplifier of present embodiment, at first the circulator from Fig. 2 right-hand member entered the downlink branch road as signal, carried out the transmission time slot input through 20 decibels the certain radiofrequency signal of directional couplers coupling.The straight-through end of coupler connects gain and adjusts level, can just insert the radiofrequency signal size of transmitting branch and carry out gain controlling by toggle switch, and method is with above-mentioned receiving branch.Then, signal enters the automatic electric-level control loop that is made of descending amplifying circuit and feedback circuit.
The automatic electric-level control loop comprises voltage-controlled attenuator, driving power amplifier, band pass filter, main power amplifier, 30 decibels of directional couplers, power detector and operational amplifiers.The be coupled signal of main power amplifier output of directional coupler, carrying out performance number then detects, within a certain period of time with the radiofrequency signal range value corresponding to direct current signal, operational amplifier is adjusted the direct current signal linear rule, makes its voltage control characteristic with voltage-controlled attenuator adaptive, when guaranteeing the coupled signal increase, the decay of voltage-controlled attenuator increases, when coupled signal reduced, the decay of voltage-controlled attenuator reduced, and the radiofrequency signal of promptly main power amplifier output is stabilized on 1 watt of constant power output.Power supply at the transmitting branch power amplifier need carry out power management, only just can provide power work at transmission time slot, thereby reduces the noise output of transmitting branch.
Behind the automatic electric-level control loop, signal is connected on the transmit-receive switch, and at transmission time slot, transmit-receive switch is in and just is in the transmitting branch on-state, and receiving branch is in off state, and radiofrequency signal is exported to antenna through being sent to circulator behind the switch.
Wherein the control principle of transmit-receive switch is: transmission time slot and receiving slot are complementary relationship in time.Transmit-receive switch respectively has one at transmitting branch and receiving branch, and when signal was in emission state, receiving terminal was connected 50 ohm, and both are in isolation.
See also Fig. 3, Fig. 3 is the block diagram of speech time slot detection of the present invention and control circuit.It has represented the Detection ﹠ Controling process of speech time slot signal, as signal when the PHS base station is connected to the amplifier of present embodiment, at first the circulator from Fig. 2 right-hand member enters the downlink branch road, carries out the transmission time slot input through 20 decibels the certain radiofrequency signal of directional coupler coupling.Here adopt rf detector to carry out input, detection means can be integrated, also can be discrete, and both principles are identical.Obtain pulse signal through detection, carry out thresholding then relatively, the radio-frequency input signals that guarantees certain level just can motivate the speech time slot signal, this signal draws control reiving/transmitting state signal by the NAND gate shaping, thereby controls the switch of two transmitting-receiving branch roads and the power management module of transmitting-receiving branch road.The straight-through end of coupler connects descending gain and adjusts level.Speech time slot detection in the present embodiment and control circuit are coupling in the downlink branch road, and detection of speech time slot and control circuit also can be coupling on other positions of up receiving branch or downlink branch road in a further embodiment.
The PHS standard definition frame structure; guard time between each speech time slot is 13 μ s, and for this reason, the rf detector that the present invention adopts can detect the speech time slot fully in 0.5 μ s time; and it is carried out shaping handle, thereby reach the purpose that the control time slot switches.In order to guarantee synchronous working, when transmitting branch carried out automatic electric-level control, the charging interval that guarantees automatic electric-level control, the retention time was 600 μ s less than 13 μ s.The power management of the speech time slot signal control transmitting-receiving branch road that utilization detects, at transmission time slot, power amplifier power supply powers on, at receiving slot, the low noise amplifier power supply electrifying, thus reach the purpose that reduces noise jamming.Therefore the present invention has good radio-frequency performance, from the experimental data that obtains such as the following table of one embodiment of the present of invention:
| Up | Descending | |
| Operating frequency | 1890～1920MHz | 1890～1920MHz |
| The single channel peak power output | ≥-5dBm | ≥30dBm |
| Range of AGC | ≥10dB | |
| Frequency error | ≤±3PPM | ≤±3PPM |
| Gain | 15dB | 27dB |
| Gain fluctuation (dB) | ±0.5dB | ±0.5dB |
| The manual gain adjustments scope | 15dB | 15dB |
| The gain-adjusted step-length | 1dB | 1dB |
| Passband fluctuation | ≤1dB | ≤1dB |
| Noise factor | ≤3Db | |
| Voltage standing wave ratio | ≤1.2 | ≤1.2 |
| The most very much not damage input power | 10dBm | 20dBm |
| Time delay | ≤2.5us | ≤2.5us |
| Spurious emissions in the working band | -30dBm(1900-1915MHz) | ≤ -30dBm(1900-1915MHz) |
| The outer spurious emissions of working band | ≤ -26dBm(9KHz-1900MHz) | ≤ -26dBm(9KHz-1900MHz) |
| ≤ -26dBm(1915-6000MHz) | ≤ -26dBm(1915-6000MHz) | |
| Intermodulation decay in the working band | ≥36dBc@0dBm/Tone | ≥36dBc@27dBm/Tone |
| Adjacent-channel power leaks | -69dBc@600KHz |
| ACP | -72dBc@9 00KHz | |
| Power supply | DC 24～27V、 5V | |
The present invention can be applied to the indoor and outdoor amplification system of PHS.Also can be widely used in the work system of two-way time division duplex, as the indoor and outdoor two-way amplifier of WLAN (wireless local area network), the indoor and outdoor amplifier of GSM and the 3G of TDSCDMA.Because two-way time division duplex mode has brought certain design difficulty for two-way amplification, this invention is a kind of implementation method preferably, can guarantee good performance, has very high reliability simultaneously, and physics realization is simple, and cost is lower.
Above introduce, it only is preferred embodiment of the present invention, can not limit scope of the invention process with this, be the variation of the equalization done according to the present invention of the those skilled in the art in the present technique field, for example each device among the above embodiment carried out function and replace or each functional module is made up.And the improvement known of those skilled in that art, all should still belong to the scope that patent of the present invention contains.
Claims (14)
1, the two-way amplifying device of a kind of communication signal comprises up receiving branch, downlink branch road and two circulators that connect the up-downgoing branch road, it is characterized in that:
Up receiving branch is formed by connecting by amplifying circuit and the transmit-receive switch between two circulators;
The detection of speech time slot and control circuit, amplifying circuit and transmit-receive switch that downlink is propped up between two circulators of route are formed by connecting;
Wherein the uplink and downlink amplifying circuit links to each other with its power supervisor respectively, and has adopted rf detector fast in detection of described speech time slot and the control circuit, can at 0.5us in the time, detect the speech time slot fully;
The speech time slot detects and control circuit detects transmission time slot and receiving slot and controls power supervisor and transmit-receive switch, closes the power supply and the transmit-receive switch of up receiving branch at transmission time slot; Close the power supply and the transmit-receive switch of downlink branch road at receiving slot.
2, the two-way amplifying device of a kind of communication signal as claimed in claim 1 is characterized in that described up amplifying circuit is connected in sequence by first order low noise amplifier, band pass filter, second level low noise amplifier.
3, the two-way amplifying device of a kind of communication signal as claimed in claim 2, what it is characterized in that being connected with up power supervisor in the described up amplifying circuit is first order low noise amplifier and second level low noise amplifier.
4, the two-way amplifying device of a kind of communication signal as claimed in claim 2 is characterized in that the frequency of described up band pass filter gating is 1890～1920 megahertzes.
5, the two-way amplifying device of a kind of communication signal as claimed in claim 1 is characterized in that also being provided with in the described up amplifying circuit one by manually controlling the gain adjustment level that receives link gain.
6, the two-way amplifying device of a kind of communication signal as claimed in claim 1 is characterized in that described descending amplifying circuit is connected in sequence by driving power amplifier, band pass filter and main power amplifier.
7, the two-way amplifying device of a kind of communication signal as claimed in claim 6, what it is characterized in that being connected with the downlink electrical source manager in the described descending amplifying circuit is the driving power amplifier.
8, the two-way amplifying device of a kind of communication signal as claimed in claim 6 is characterized in that the frequency of described descending band pass filter gating is 1890～1920 megahertzes.
9, the two-way amplifying device of a kind of communication signal as claimed in claim 1, the input that it is characterized in that described descending amplifying circuit also is provided with a voltage-controlled attenuator, be provided with a feedback circuit between the output of descending amplifying circuit and the voltage-controlled attenuator, feedback circuit makes the size of descending amplifying circuit output be directly proportional with the size of voltage-controlled attenuator attenuation amplitude.
10, the two-way amplifying device of a kind of communication signal as claimed in claim 9 is characterized in that the automatic feedback circuit of adjusting of described power output is connected in sequence by directional coupler, power detector and operational amplifier.
11, the two-way amplifying device of a kind of communication signal as claimed in claim 10 is characterized in that described directional coupler is 30 decibels of directional couplers.
12, the two-way amplifying device of a kind of communication signal as claimed in claim 1 is characterized in that described speech time slot detects and control circuit is connected in sequence by directional coupler, rf detector and NAND gate.
13, the two-way amplifying device of a kind of communication signal as claimed in claim 12 is characterized in that the coupler in the described testing circuit is 20 decibels of directional couplers.
14, the two-way amplifying device of a kind of communication signal as claimed in claim 1 is characterized in that also being provided with in the described descending amplifying circuit one by manually controlling the gain adjustment level that receives link gain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100252297A CN100349389C (en) | 2004-06-17 | 2004-06-17 | Communication signal bidirection amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100252297A CN100349389C (en) | 2004-06-17 | 2004-06-17 | Communication signal bidirection amplifier |
Publications (2)
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| CN1592145A CN1592145A (en) | 2005-03-09 |
| CN100349389C true CN100349389C (en) | 2007-11-14 |
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| CNB2004100252297A Expired - Fee Related CN100349389C (en) | 2004-06-17 | 2004-06-17 | Communication signal bidirection amplifier |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103857026B (en) * | 2014-02-27 | 2017-05-10 | 京信通信系统（广州）有限公司 | Downlink signal processing device and method, signal processing system and a signal processing method |
| CN104393847B (en) * | 2014-10-27 | 2017-07-28 | 北京遥测技术研究所 | Receive and dispatch driving amplifier in a kind of tunnel of compact four |
| CN110771034B (en) * | 2017-06-30 | 2023-11-10 | 上海诺基亚贝尔股份有限公司 | Power amplifying circuit for time division duplex mode |
| CN111353319B (en) * | 2018-12-20 | 2024-01-05 | 航天信息股份有限公司 | Bidirectional amplifier and radio frequency tag information transmission equipment |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0605182A2 (en) * | 1992-12-30 | 1994-07-06 | Yoshiro Niki | Bidirectional repeater for mobile telephone system |
| JPH09214418A (en) * | 1996-01-31 | 1997-08-15 | Matsushita Electric Works Ltd | Radio repeater |
| CN1476183A (en) * | 2003-07-18 | 2004-02-18 | �����ƶ�ͨ���豸����˾ | Method and device for proceeding bidirectional synchronous translate against radio signal |
-
2004
- 2004-06-17 CN CNB2004100252297A patent/CN100349389C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0605182A2 (en) * | 1992-12-30 | 1994-07-06 | Yoshiro Niki | Bidirectional repeater for mobile telephone system |
| JPH09214418A (en) * | 1996-01-31 | 1997-08-15 | Matsushita Electric Works Ltd | Radio repeater |
| CN1476183A (en) * | 2003-07-18 | 2004-02-18 | �����ƶ�ͨ���豸����˾ | Method and device for proceeding bidirectional synchronous translate against radio signal |
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| CN1592145A (en) | 2005-03-09 |
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