CN101232320A - Realizing method of TD-SCDMA straight amplification station and straight amplification station - Google Patents
Realizing method of TD-SCDMA straight amplification station and straight amplification station Download PDFInfo
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Abstract
The invention relates to a realization method of a TD-SCDMA repeater and the repeater. The method comprises the following steps that the detection of whether the input and output signals of a uplink and a downlink of the repeater exceed the threshold is carried out, the output point of the downlink input signal which exceeds the threshold is recorded as A point, the output point of the downlink output signal which exceeds the threshold is recorded as B point, the output point of the uplink input signal which exceeds the threshold is recorded as C point, and the output point of the uplink output signal which exceeds the threshold is recorded as D point; if the uplink and the downlink are detected to have no input signals which exceed the threshold, then the uplink is communicated, if the uplink and the downlink are detected to have the input signals which exceed the threshold, then the communication or disconnection or keeping of the uplink or the downlink are respectively judged according to the detected states of the four points of A, B, C and D; and the normal work of an equipment of the TD-SCDMA repeater can be realized according to the detected result. The invention also provides the repeater; the invention has low manufacturing cost, easy implementation and safety.
Description
[technical field]
The present invention relates to repeater equipment optimization in Properties in the communications field, improved repeater equipment after relating in particular to the implementation method of a kind of TD-SCDMA (TimeDivision Synchronous Code Division Multiple Access) moving communicating field repeater and utilizing this method.
[background technology]
The TD-SCDMA standard is by the Institute of Telecommunication Sciences and Technology of China's Ministry of Information Industry (CATT) and Siemens cooperative development, it adopts time division duplex (TDD), the work of TDMA/CDMA multi-access mode, based on technology such as synchronization CDMA, smart antenna, software radio, joint-detection and forward variable spread spectrum coefficients, its target is that foundation has spectral efficient, high economic benefit and advanced mobile communication system.
The repeater is the important component part of communication system, be to solve communication network to extend the preferred version that covers, it compare with the base station have simple in structure, cost is low and easy for installation, by the blind area that extensively applies to be difficult to cover, such as, areas such as underground parking, elevator, harbour.
There are 2 kinds of schemes existing TD-SCDMA repeater: a kind of is to adopt radio-frequency (RF) switch as the uplink downlink handover scheme, and another is to adopt the scheme of circulator as duplexer.
As figure one is the existing repeater schematic diagram that adopts radio-frequency (RF) switch as the uplink downlink handover scheme:
Mainly comprise donor antenna 114, filter 101, radio frequency control switch 102, ascending power amplifier 103, monitoring unit 104, synchronization module 105, radio frequency numerical-control attenuator 106, up low noise amplifier 107, radio frequency control switch 108, filter 109, retransmitting antenna 110, downlink power amplifier 111, radio frequency numerical-control attenuator 112, descending low noise amplifier 113; The step of wherein obtaining switching point all is to finish in various synchronization modules 105 with above methodological function.
Adopt the major technique of this method to be obtaining of up-downgoing switching point, the existing method of obtaining switching point mainly contains 3 kinds: the GPS module synchronously, terminal synchronizes and base station transmit synchronously.
One, the GPS module method of synchronization: GPS (Global Positioning System, the global positioning system) method of synchronization adopts the GPS synchronization module to utilize gps clock to carry out synchronously.Because GPS module cost is higher, and the infield limits by gps antenna, mainly is applicable to the base station.
Two, terminal synchronizes mode: use TD terminal synchronizes module, separate descending pilot code and carry out synchronously.Equally, the decoder module cost is also higher, and a series of problem can be brought in the terminal alms giver sector that not necessarily networks.
Three, the method for synchronization is transmitted in the base station: utilize O﹠amp between base station and repeater equipment; The M passage directly transmits base station synchronization information, sends first or second switching point information of trunking network side to, makes repeater equipment obtain first, second switching point.This mode can realize precise synchronization between each equipment, the reliability height.Constraint is too high but this scheme is subjected to engineering site, and must allow can wired connection between base station and the repeater equipment.
As figure two are existing repeater schematic diagrames that adopt circulator as the duplexer scheme:
But the repeater equipment of this scheme is because circulator is only passed through in the isolation of up-downgoing, antenna and output are coupled when bad, can get back to another one reception link to the signal reflex of emission and get on, parts such as power amplifier and LNA are burnt in the ring self-excitation easily in forming easily.
[summary of the invention]
The objective of the invention is to overcome above-mentioned deficiency, propose a kind of low cost, easily realize and be difficult for producing the method for TD-SCDMA repeater of self-excitation and the repeater equipment that adopts this method to design.
For achieving the above object, technical scheme provided by the present invention is:
The implementation method of a kind of TD-SCDMA repeater, be based on the TD-SCDMA repeater of circulator as duplexer, whether detect described repeater uplink downlink has input and output signal to surpass the threshold value thresholding, above the output high level " 1 " of threshold value thresholding, be lower than the output low level " 0 " of threshold value thresholding; And the output point whether descending input signal surpasses the threshold value thresholding is designated as the A point, descendingly import out the output point whether signal surpass the threshold value thresholding and be designated as the B point, the output point whether up input signal surpasses the threshold value thresholding is designated as the C point, and the output point whether up output signal surpasses the threshold value thresholding is designated as the D point; If detect the input signal that uplink downlink does not all surpass the threshold value thresholding, then be communicated with up link or keep the up link connected state, if detect uplink downlink input signal above the threshold value thresholding is arranged, then judge it is to be communicated with or to disconnect the upstream or downstream link or keep upstream or downstream link connected state respectively according to the state of 4 of detected ABCD; According to above detected result, just can realize the operate as normal of TD-SCDMA repeater equipment.
Described have input signal above the threshold value thresholding if detect uplink downlink, then judge it is to be communicated with or disconnection upstream or downstream link or maintenance upstream or downstream link connected state respectively, comprise following step respectively according to the state of 4 of detected ABCD:
1), if the ABCD state that detects is 0010, then be communicated with up link or keep the up link connected state, otherwise to step 2);
2), if the ABCD state that detects is 0011, then keep the up link connected state, otherwise to step 3);
3), if the ABCD state that detects is 1011, then keep the up link connected state, otherwise to step 4);
4), if the ABCD state that detects is 1001, then keep the up link connected state, otherwise to step 5);
5), if the ABCD state that detects is 1000, then disconnect the up link connected state, be communicated with down link, otherwise to step 6);
6), if the ABCD state that detects is 1100, then keep being communicated with down link, otherwise to step 7);
7), if the ABCD state that detects is 1110, then keep being communicated with down link, otherwise to step 8);
8), if the ABCD state that detects is 0110, then keep being communicated with down link, otherwise be communicated with up link or keep the up link connected state, the state when promptly changing uplink downlink over to and all not surpassing the input signal of threshold value thresholding.
Described detection uplink downlink has or not above the input signal of threshold value thresholding to be finished by power detecting unit.
Judge whether the size of power detection signal is finished by the threshold value threshold judgement device in the power detecting unit above the threshold value that sets in advance.
Connection or disconnection upstream or downstream link or maintenance upstream or downstream link connected state are finished by radio-frequency (RF) switch.
The present invention also provides the repeater of the above method improvement of a kind of foundation, comprise donor antenna 213, filter 201, circulator 202, ascending power amplifier 203, monitoring unit 204, radio frequency numerical-control attenuator 205, up low noise amplifier 206, circulator 207, filter 208, retransmitting antenna 209, downlink power amplifier 210, radio frequency numerical-control attenuator 211, descending low noise amplifier 212 also comprises descending input power detecting unit, the down output power detecting unit, up input power detecting unit, up power output detecting unit and first, second radio-frequency (RF) switch and combinational logic decision unit; Wherein,
The coupling position of descending input power detecting unit can be between donor antenna 213 and filter 201 or filter 201 and circulator 202 or circulator 202 and descending low noise amplifier 212 or descending low noise amplifier 212 and radio frequency numerical-control attenuator 211, radio frequency numerical-control attenuator 211 and downlink power amplifier 210;
The coupling position of down output power detecting unit is at the output of downlink power amplifier 210;
The coupling position of up input power detecting unit can be between retransmitting antenna 209 and filter 208 or filter 208 and circulator 207 or circulator 207 and up low noise amplifier 206 or up low noise amplifier 206 and radio frequency numerical-control attenuator 205 or radio frequency numerical-control attenuator 205 and ascending power amplifier 203; Described down output power detecting unit comprises coupling circuit, power-sensing circuit and the second threshold value threshold judgement device, the input of described coupling circuit is the input of down output power detecting unit, the output of coupling circuit is the output of down output power detecting unit, the input of its coupled end and power-sensing circuit links to each other, and the output of power-sensing circuit links to each other with the second threshold value threshold judgement device.
Described up input power detecting unit comprises coupling circuit, power-sensing circuit and the 3rd threshold value threshold judgement device, the input of described coupling circuit is the input of up input power detecting unit, the output of coupling circuit is the output of up input power detecting unit, the input of its coupled end and power-sensing circuit links to each other, and the output of power-sensing circuit links to each other with the 3rd threshold value threshold judgement device; Described up power output detecting unit comprises coupling circuit, power-sensing circuit and the 4th threshold value threshold judgement device, the input of described coupling circuit is the input of up power output detecting unit, the output of coupling circuit is the output of up power output detecting unit, the input of its coupled end and power-sensing circuit links to each other, and the output of power-sensing circuit links to each other with the 4th threshold value threshold judgement device.
The coupling position of up power output detecting unit is at the output of ascending power amplifier 203;
First radio-frequency (RF) switch always remains on after the descending input power detecting unit;
Second radio-frequency (RF) switch always remains on after the up input power detecting unit;
The combinational logic decision unit links to each other with first, second radio-frequency (RF) switch respectively.
The method provided by the invention and the repeater of method improvement are thus adopted the repeater of radio-frequency (RF) switch as the uplink downlink handover scheme relatively, low cost of manufacture, realize easily; Adopt the repeater of circulator relatively, have certain anti-interference function again, therefore be not easy to take place self-excitation phenomena, can not produce the dangerous situation of devices such as burning power amplifier and LNA as the duplexer scheme, as safe as a house.
[description of drawings]
Fig. 1 is for adopting the repeater structured flowchart of radio-frequency (RF) switch as the uplink downlink handover scheme;
Fig. 2 is for adopting the repeater structured flowchart of circulator as the duplexer scheme;
Fig. 3 is the schematic flow sheet of the inventive method.
[embodiment]
Below in conjunction with specific embodiment and accompanying drawing in detail the present invention is described in detail.
The embodiment of method:
The present invention is based on the TD-SCDMA repeater of circulator as the duplexer scheme, whether detect described repeater uplink downlink has input and output signal to surpass the threshold value thresholding, if surpass the output high level " 1 " of threshold value thresholding, be lower than the output low level " 0 " of threshold value thresholding; And the output point whether descending input signal surpasses the threshold value thresholding is designated as the A point, descendingly import out the output point whether signal surpass the threshold value thresholding and be designated as the B point, the output point whether up input signal surpasses the threshold value thresholding is designated as the C point, and the output point whether up output signal surpasses the threshold value thresholding is designated as the D point; Shown in the flow chart of Fig. 3, if detect the input signal that uplink downlink does not all surpass the threshold value thresholding, then be communicated with up link or keep the up link connected state, if detect uplink downlink input signal above the threshold value thresholding is arranged, then judge it is to be communicated with or to disconnect the upstream or downstream link or keep upstream or downstream link connected state respectively according to the state of 4 of detected ABCD; According to above detected result, just can realize the operate as normal of TD-SCDMA repeater equipment.
Further, if detect uplink downlink input signal above the threshold value thresholding is arranged, then judge it is to be communicated with or disconnection upstream or downstream link or maintenance upstream or downstream link connected state respectively, comprise following step respectively according to the state of 4 of detected ABCD:
1), if the ABCD state that detects is 0010, then be communicated with up link or keep the up link connected state, otherwise to step 2);
2), if the ABCD state that detects is 0011, then keep the up link connected state, otherwise to step 3);
3), if the ABCD state that detects is 1011, then keep the up link connected state, otherwise to step 4);
4), if the ABCD state that detects is 1001, then keep the up link connected state, otherwise to step 5);
5), if the ABCD state that detects is 1000, then disconnect the up link connected state, be communicated with down link, otherwise to step 6);
6), if the ABCD state that detects is 1100, then keep being communicated with down link, otherwise to step 7);
7), if the ABCD state that detects is 1110, then keep being communicated with down link, otherwise to step 8);
8), if the ABCD state that detects is 0110, then keep being communicated with down link, otherwise be communicated with up link or keep the up link connected state, the state when promptly changing uplink downlink over to and all not surpassing the input signal of threshold value thresholding.
Wherein, increase the logical decision unit, and increase power detecting unit and threshold value decision unit, also in uplink downlink, increased radio-frequency (RF) switch simultaneously at the input and output port of uplink downlink adopting on the basis of circulator as the duplexer scheme; The size of power detecting unit detection signal; The threshold value decision unit is whether the size of judging the power detection signal surpasses the threshold value that sets in advance, and establishes above thresholding output high level " 1 ", is lower than thresholding output low level " 0 ";
In conjunction with the existing repeater structure of Fig. 2, adopt the method for coupling to increase descending input power detecting unit at the input of down link; The coupling position of descending input power detecting unit can be between antenna 213 and filter 201, filter 201 and circulator 202, circulator 202 and descending low noise amplifier 212, descending low noise amplifier 212 and radio frequency numerical-control attenuator 211, radio frequency numerical-control attenuator 211 and downlink power amplifier 210.
Input in up link adopts the method for coupling to increase up input power detecting unit; Up input power detecting unit can be between antenna 209 and filter 208, filter 208 and circulator 207, circulator 207 and up low noise amplifier 206, up low noise amplifier 206 and radio frequency numerical-control attenuator 205, radio frequency numerical-control attenuator 205 and ascending power amplifier 203.
Ascending power amplifier 203 outputs adopt the method for coupling to increase up power output detecting unit in up link.
Described descending input power detecting unit comprises coupling circuit, power-sensing circuit and first threshold threshold judgement device, the input of coupling circuit is the input of descending input power detecting unit, the output of coupling circuit is the output of descending input power detecting unit, the input of coupled end and power-sensing circuit links to each other, the output of power-sensing circuit links to each other with first threshold threshold judgement device, when the performance number that detects when power-sensing circuit surpasses first threshold threshold judgement device threshold value is set, first threshold threshold judgement device output high level " 1 ", otherwise output low level " 0 ", and first threshold threshold judgement device output point called the A point.
Described down output power detecting unit comprises coupling circuit, the power-sensing circuit and the second threshold value threshold judgement device, the input of coupling circuit is the input of down output power detecting unit, the output of coupling circuit is the output of down output power detecting unit, the input of coupled end and power-sensing circuit links to each other, the output of power-sensing circuit links to each other with the second threshold value threshold judgement device, when the performance number that detects when power-sensing circuit surpasses the second threshold value threshold judgement device threshold value is set, second threshold value threshold judgement device output high level " 1 ", otherwise output low level " 0 ", and the second threshold value threshold judgement device output point called the B point.
Described up input power detecting unit comprises coupling circuit, power-sensing circuit and the 3rd threshold value threshold judgement device, the input of coupling circuit is the input of up input power detecting unit, the output of coupling circuit is the output of up input power detecting unit, the input of coupled end and power-sensing circuit links to each other, the output of power-sensing circuit links to each other with first threshold threshold judgement device, when the performance number that detects when power-sensing circuit surpasses the 3rd threshold value threshold judgement device threshold value is set, the 3rd threshold value threshold judgement device output high level " 1 ", otherwise output low level " 0 ", and the 3rd threshold value threshold judgement device output point called the C point.
Described up power output detecting unit comprises coupling circuit, power-sensing circuit and the 4th threshold value threshold judgement device, the input of coupling circuit is the input of up power output detecting unit, the output of coupling circuit is the output of up power output detecting unit, the input of coupled end and power-sensing circuit links to each other, the output of power-sensing circuit links to each other with the 4th threshold value threshold judgement device, when the performance number that detects when power-sensing circuit surpasses the 4th threshold value threshold judgement device threshold value is set, the 4th threshold value threshold judgement device output high level " 1 ", otherwise output low level " 0 ", and the 4th threshold value threshold judgement device output point called the D point.
Increase by first radio-frequency (RF) switch in down link, and closing of radio-frequency (RF) switch thought " 0 ", " 1 " is thought in opening of radio-frequency (RF) switch; The position of first radio-frequency (RF) switch can be between circulator 202 and descending low noise amplifier 212, descending low noise amplifier 212 and radio frequency numerical-control attenuator 211, radio frequency numerical-control attenuator 211 and downlink power amplifier 210, but first radio-frequency (RF) switch is always in the back of descending input power detecting unit, and the relativeness of front and back position is to judge according to walking always of link.
Increase by second radio-frequency (RF) switch in up link, and closing of radio-frequency (RF) switch thought " 0 ", " 1 " is thought in opening of radio-frequency (RF) switch; The position of second radio-frequency (RF) switch can be between circulator 207 and up low noise amplifier 206, up low noise amplifier 206 and radio frequency numerical-control attenuator 205, radio frequency numerical-control attenuator 205 and ascending power amplifier 203, but second radio-frequency (RF) switch is always in the back of up input power detecting unit, and the relativeness of front and back position is to judge according to walking always of link.
The inner combinational logic decision unit that increases in the repeater, the combinational logic decision unit links to each other with first radio-frequency (RF) switch, second radio-frequency (RF) switch and above-mentioned A point, B point, C point, D point respectively.
Described combinational logic decision unit comprises that mainly combinational logic circuit constitutes, major function is to judge that according to the level situation that ABCD is ordered the switch of radio-frequency (RF) switch and the state of first radio-frequency (RF) switch and second radio-frequency (RF) switch always are in opposite state, when promptly first radio-frequency (RF) switch was out, second radio-frequency (RF) switch was for closing; First radio-frequency (RF) switch is when closing, and second radio-frequency (RF) switch is for opening; Opening of radio-frequency (RF) switch always lags behind closing of another radio-frequency (RF) switch, mainly contains following five kinds of situations, specifically is listed as follows:
When (1) provisional capital does not have signal up and down:
| Sequence number | A | ?B | ?C | ?D | First radio-frequency (RF) switch | Second radio-frequency (RF) switch |
| 1 | 0 | 0 | 0 | 0 | 0 | 1 |
From this state as can be seen, when the provisional capital did not have signal up and down, second radio-frequency (RF) switch is in to be opened, and first radio-frequency (RF) switch is in closes, and repeater equipment work is in uplink link status.
(2) up have a signal, descending state variation when not having signal:
| Sequence number | A | ?B | ?C | ?D | First radio-frequency (RF) switch | Second radio-frequency (RF) switch |
| 1 | ?0 | ?0 | ?0 | ?0 | ?0 | ?1 |
| 2 | ?0 | ?0 | ?1 | ?0 | ?0 | ?1 |
| 3 | ?0 | ?0 | ?1 | ?1 | ?0 | ?1 |
From this state as can be seen, when repeater equipment never received signal to up when signal is arranged, the C dotted state at first is turned to " 1 " by " 0 ", the D dotted state is immediately following also be turned to " 1 " by " 0 " behind the C point, the repeater radio-frequency (RF) switch keeps original state, and promptly second radio-frequency (RF) switch of repeater is in open mode; First radio-frequency (RF) switch is in closed condition.This moment, repeater equipment work was in uplink link status.
(3) descending have a signal, up state variation when not having signal:
| Sequence number | A | ?B | ?C | ?D | First radio-frequency (RF) switch | Second radio-frequency (RF) switch |
| 1 | 0 | 0 | 0 | 0 | 0 | 1 |
| 2 | 1 | 0 | 0 | 0 | 1 | 0 |
| 3 | 1 | 1 | 0 | 0 | 1 | 0 |
From this state as can be seen, when repeater equipment never received signal to descending when signal is arranged, the A dotted state at first is turned to " 1 " by " 0 ", second radio-frequency (RF) switch of repeater changes to closed condition by original open mode, and first radio-frequency (RF) switch is changed to the state of opening by original closed condition; The B dotted state is immediately following also be turned to " 1 " by " 0 " behind the A point.This moment, the repeater was in the downlink working state.
(4) do not have signal signal to be arranged from provisional capital up and down, the state variation when switching to downstream signal again to upward signal:
| Sequence number | A | ?B | ?C | ?D | First radio-frequency (RF) switch | Second radio-frequency (RF) switch |
| 1 | 0 | ?0 | ?0 | ?0 | ?0 | ?1 |
| 2 | 0 | ?0 | ?1 | ?0 | ?0 | ?1 |
| 3 | 0 | ?0 | ?1 | ?1 | ?0 | ?1 |
| 4 | 1 | ?0 | ?1 | ?1 | ?0 | ?1 |
| 5 | 1 | ?0 | ?0 | ?1 | ?0 | ?1 |
| 6 | 1 | ?0 | ?0 | ?0 | ?1 | ?0 |
| 7 | 1 | ?1 | ?0 | ?0 | ?1 | ?0 |
From this state as can be seen, when repeater equipment never received signal to up when signal is arranged, the C dotted state at first is turned to " 1 " by " 0 ", the D dotted state is immediately following also be turned to " 1 " by " 0 " behind the C point, the repeater radio-frequency (RF) switch keeps original state, and promptly second radio-frequency (RF) switch of repeater is in open mode; First radio-frequency (RF) switch is in closed condition.This moment, repeater equipment work was in uplink link status.When will switch to down link by up link, also by receiving descending next signal, promptly sequence number 4 was an intermediateness when repeater was operated in up link, and the state of first radio-frequency (RF) switch and the second radio-frequency (RF) switch correspondence is 01.But when radio-frequency (RF) switch only occurred over just sequence number when switching and is 6, promptly the state of ABCD correspondence was 1000, and at this time and then the transfer sequence of radio-frequency (RF) switch correspondence opens first radio-frequency (RF) switch at first closing second radio-frequency (RF) switch.From this point as can be seen, adopt the method for this judgement also to have certain anti-interference function.
(5) do not have signal signal to be arranged from provisional capital up and down, the state variation when switching to upward signal again to downstream signal:
| Sequence number | A | ?B | ?C | ?D | First radio-frequency (RF) switch | Second radio-frequency (RF) switch |
| ?1 | ?0 | ?0 | ?0 | ?0 | ?0 | ?1 |
| ?2 | ?1 | ?0 | ?0 | ?0 | ?1 | ?0 |
| ?3 | ?1 | ?1 | ?0 | ?0 | ?1 | ?0 |
| ?4 | ?1 | ?1 | ?1 | ?0 | ?1 | ?0 |
| ?5 | ?0 | ?1 | ?1 | ?0 | ?1 | ?0 |
| ?6 | ?0 | ?0 | ?1 | ?0 | ?0 | ?1 |
| ?7 | ?0 | ?0 | ?1 | ?1 | ?0 | ?1 |
From this state as can be seen, never received signal is to descending when signal is arranged when repeater equipment, and the A dotted state at first is turned to " 1 " by " 0 ", and at this moment second radio-frequency (RF) switch is closed, and then open first radio-frequency (RF) switch, the B dotted state is immediately following also be turned to " 1 " by " 0 " behind the A point; This moment, repeater equipment work was in downlink status.When down link will switch to up link, when repeater equipment is operated in downlink status also in receiving the up signal that comes, be that state 1110, the first radio-frequency (RF) switch of ABCD correspondence in the sequence number 4 and the state of the second radio-frequency (RF) switch correspondence are 10.But when radio-frequency (RF) switch only occurred over just sequence number when switching and is 6, promptly the state of ABCD correspondence was 0010, and at this time and then the transfer sequence of radio-frequency (RF) switch correspondence opens first radio-frequency (RF) switch at first closing second radio-frequency (RF) switch.From this point as can be seen, adopt the method for this judgement also to have certain anti-interference function.
From above five kinds of states we as can be seen because the scheme of decision mechanism is introduced in the repeater, no longer need GPS synchronization module or TD terminal synchronizes module or base station to transmit synchronizing information control radio-frequency (RF) switch, overcome deficiencies such as existing cost height, place restriction; Also avoided simultaneously existing employing circulator the interior deficiency of encircling self-excitation to take place, avoided burning out device as the repeater of duplexer, safer comparatively speaking.
The embodiment of device:
The present invention also provides a kind of repeater after improving according to said method, and its concrete structure is set forth in the embodiment of method to some extent, does not give unnecessary details at this, and wherein a kind of course of work of state is as follows just to introduce this repeater:
When the repeater is operated in down link, donor antenna receives signal from the space and is called downstream signal, received signal is impure, may comprise some noises, these signals at first enter into the filter 201 of repeater, filter 201 extracts the signal of setting frequency range by filtering, and signal delivered to circulator 202, one-way according to circulator 202, the downstream signal that receives is delivered to descending input power detecting unit, coupling circuit in the descending input power detecting unit is coupled out the small part radio frequency energy and delivers to power-sensing circuit, and power-sensing circuit detects current signal, and the value that detects is delivered to first threshold threshold judgement device, first threshold threshold judgement device is judged current demand signal and is surpassed the threshold value that pre-sets, and in A point output " 1 ", at this moment, the state of ABCD has just become 1000.In a single day the state that the combinational logic decision unit detects ABCD has become at 1000 o'clock, just close second radio-frequency (RF) switch earlier, open first radio-frequency (RF) switch again or keep original second radio-frequency (RF) switch to close, the state that first radio-frequency (RF) switch is opened, this moment, the operating state of repeater just switched to the down link operating state.Remaining signal energy is smoothly through being sent to descending low noise amplifier 212 after first radio-frequency (RF) switch in overcoupled circuits, descending low noise amplifier 212 amplifies faint signal, delivering to downlink power amplifier 210 behind the downstream signal process radio frequency numerical-control attenuator 211 after the amplification amplifies again, be exaggerated more powerful downstream signal to deliver to retransmitting antenna, and downstream signal be transmitted into the place that needs covering by retransmitting antenna through circulator 207 and filter 208.So just finish downstream signal from receiving amplification, covered the function of designated area more again.
When the repeater is operated in up link, retransmitting antenna receives signal from the space and is called upward signal, received signal is impure, may comprise some noises, these signals at first enter into the filter 208 of repeater, filter 208 extracts the signal of setting frequency range by filtering, and signal delivered to circulator 207, one-way according to circulator 207, the upward signal that receives is delivered to up low noise amplifier 206, up low noise amplifier 206 zooms into signal than macro-energy to faint upward signal, and the signal after amplifying is delivered to up input power detecting unit.Coupling circuit in the up input power detecting unit is coupled out the small part radio frequency energy and delivers to power-sensing circuit, power-sensing circuit detects current signal, and a value that detects is delivered to the second threshold value threshold judgement device, the second threshold value threshold judgement device is judged current demand signal and is surpassed the threshold value that pre-sets, and in C point output " 1 ", at this moment, the state of ABCD has just become 0010.In a single day the state that the combinational logic decision unit detects ABCD has become at 0010 o'clock, just close first radio-frequency (RF) switch earlier, open second radio-frequency (RF) switch again or keep original first radio-frequency (RF) switch to close, the state that second radio-frequency (RF) switch is opened, this moment, the operating state of repeater just switched to the up link operating state.Be sent to second radio-frequency (RF) switch through remaining signal energy of overcoupled circuits because second radio-frequency (RF) switch is in open mode, the upward signal after being exaggerated along page or leaf sharp passed through second radio-frequency (RF) switch after be sent to radio frequency numerical-control attenuator 205.Being sent to ascending power amplifier 203 again behind the upward signal process radio frequency numerical-control attenuator 205 amplifies again, be exaggerated more powerful upward signal to deliver to donor antenna, and upward signal be transmitted into the base station of appointment by donor antenna through circulator 202 and filter 201.So just finish upward signal from receiving amplification, be forwarded to the function of specific base more again.
Above-described only is better embodiment of the present invention, and it describes comparatively concrete and detailed, can not therefore be interpreted as the restriction to claim of the present invention.Should be understood that; for the person of ordinary skill of the art; without departing from the inventive concept of the premise; in the scope of technical solution of the present invention; utilize the technology contents of above-mentioned announcement to make some changes or be modified to the equivalent embodiment of equivalent variations, these all belong to protection scope of the present invention.
Claims (10)
1. the implementation method of a TD-SCDMA repeater, be based on the TD-SCDMA repeater of circulator as duplexer, it is characterized in that, whether detect described repeater uplink downlink has input and output signal to surpass the threshold value thresholding, if surpass the output high level " 1 " of threshold value thresholding, be lower than the output low level " 0 " of threshold value thresholding; And the output point whether descending input signal surpasses the threshold value thresholding is designated as the A point, the output point whether descending output signal surpasses the threshold value thresholding is designated as the B point, the output point whether up input signal surpasses the threshold value thresholding is designated as the C point, and the output point whether up output signal surpasses the threshold value thresholding is designated as the D point; If detect the input signal that uplink downlink does not all surpass the threshold value thresholding, then be communicated with or keep the up link connected state, if detect uplink downlink input signal above the threshold value thresholding is arranged, then judge it is to be communicated with or to disconnect the upstream or downstream link or keep upstream or downstream link connected state respectively according to the state of 4 of detected ABCD; According to above detected result, just can realize the operate as normal of TD-SCDMA repeater equipment.
2. implementation method according to claim 1, it is characterized in that, described have input signal above the threshold value thresholding if detect uplink downlink, then judge it is to be communicated with or disconnection upstream or downstream link or maintenance upstream or downstream link connected state respectively, comprise following step respectively according to the state of 4 of detected ABCD:
1), if the ABCD state that detects is 0010, then be communicated with up link or keep the up link connected state, otherwise to step 2);
2), if the ABCD state that detects is 0011, then keep the up link connected state, otherwise to step 3);
3), if the ABCD state that detects is 1011, then keep the up link connected state, otherwise to step 4);
4), if the ABCD state that detects is 1001, then keep the up link connected state, otherwise to step 5);
5), if the ABCD state that detects is 1000, then disconnect the up link connected state, be communicated with down link, otherwise to step 6);
6), if the ABCD state that detects is 1100, then keep being communicated with down link, otherwise to step 7);
7), if the ABCD state that detects is 1110, then keep being communicated with down link, otherwise to step 8);
8), if the ABCD state that detects is 0110, then keep being communicated with down link, otherwise be communicated with up link or keep the up link connected state, the state when promptly changing uplink downlink over to and all not surpassing the input signal of threshold value thresholding.
3. implementation method according to claim 1 and 2 is characterized in that, described detection uplink downlink has or not above the input signal of threshold value thresholding to be finished by power detecting unit.
4. implementation method according to claim 3 is characterized in that, judges whether the size of power detection signal is finished by the threshold value threshold judgement device in the power detecting unit above the threshold value that sets in advance.
5. implementation method according to claim 4 is characterized in that, connection or disconnection upstream or downstream link or maintenance upstream or downstream link connected state are finished by radio-frequency (RF) switch.
6. the improved repeater of implementation method according to claim 1, comprise donor antenna (213), filter (201), circulator (202), ascending power amplifier (203), monitoring unit (204), radio frequency numerical-control attenuator (205), up low noise amplifier (206), circulator (207), filter (208), retransmitting antenna (209), downlink power amplifier (210), radio frequency numerical-control attenuator (211), descending low noise amplifier (212), it is characterized in that, also comprise descending input power detecting unit, the down output power detecting unit, up input power detecting unit, up power output detecting unit and first, second radio-frequency (RF) switch and combinational logic decision unit; Wherein,
The coupling position of descending input power detecting unit can be between donor antenna (213) and filter (201) or filter (201) and circulator (202) or circulator (202) and descending low noise amplifier (212) or descending low noise amplifier (212) and radio frequency numerical-control attenuator (211), radio frequency numerical-control attenuator (211) and downlink power amplifier (210);
The coupling position of down output power detecting unit is at the output of downlink power amplifier (210);
The coupling position of up input power detecting unit can be between retransmitting antenna (209) and filter (208) or filter (208) and circulator (207) or circulator (207) and up low noise amplifier (206) or up low noise amplifier (206) and radio frequency numerical-control attenuator (205) or radio frequency numerical-control attenuator (205) and ascending power amplifier (203);
The coupling position of up power output detecting unit is at the output of ascending power amplifier (203);
First radio-frequency (RF) switch always remains on after the descending input power detecting unit;
Second radio-frequency (RF) switch always remains on after the up input power detecting unit;
The combinational logic decision unit links to each other with first, second radio-frequency (RF) switch respectively.
7. repeater according to claim 6, it is characterized in that, described descending input power detecting unit comprises coupling circuit, power-sensing circuit and first threshold threshold judgement device, the input of described coupling circuit is the input of descending input power detecting unit, the output of coupling circuit is the output of descending input power detecting unit, the input of its coupled end and power-sensing circuit links to each other, and the output of power-sensing circuit links to each other with first threshold threshold judgement device; Described down output power detecting unit comprises coupling circuit, power-sensing circuit and the second threshold value threshold judgement device, the input of described coupling circuit is the input of down output power detecting unit, the output of coupling circuit is the output of down output power detecting unit, the input of its coupled end and power-sensing circuit links to each other, and the output of power-sensing circuit links to each other with the second threshold value threshold judgement device.
8. according to claim 6 or 7 described repeaters, it is characterized in that, described up input power detecting unit comprises coupling circuit, power-sensing circuit and the 3rd threshold value threshold judgement device, the input of described coupling circuit is the input of up input power detecting unit, the output of coupling circuit is the output of up input power detecting unit, the input of its coupled end and power-sensing circuit links to each other, and the output of power-sensing circuit links to each other with the 3rd threshold value threshold judgement device; Described up power output detecting unit comprises coupling circuit, power-sensing circuit and the 4th threshold value threshold judgement device, the input of described coupling circuit is the input of up power output detecting unit, the output of coupling circuit is the output of up power output detecting unit, the input of its coupled end and power-sensing circuit links to each other, and the output of power-sensing circuit links to each other with the 4th threshold value threshold judgement device.
9. repeater according to claim 8, it is characterized in that the position of described first radio-frequency (RF) switch is between circulator (202) and descending low noise amplifier (212) or descending low noise amplifier (212) and radio frequency numerical-control attenuator (211) or radio frequency numerical-control attenuator (211) and downlink power amplifier (210); The position of described second radio-frequency (RF) switch is between circulator (207) and up low noise amplifier (206) or up low noise amplifier (206) and radio frequency numerical-control attenuator (205) or radio frequency numerical-control attenuator (205) and ascending power amplifier (203).
10. repeater according to claim 8 is characterized in that, described combinational logic decision unit comprises combinational logic circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101256227A CN101232320A (en) | 2007-12-29 | 2007-12-29 | Realizing method of TD-SCDMA straight amplification station and straight amplification station |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101256227A CN101232320A (en) | 2007-12-29 | 2007-12-29 | Realizing method of TD-SCDMA straight amplification station and straight amplification station |
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| CN101232320A true CN101232320A (en) | 2008-07-30 |
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| CNA2007101256227A Pending CN101232320A (en) | 2007-12-29 | 2007-12-29 | Realizing method of TD-SCDMA straight amplification station and straight amplification station |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740338A (en) * | 2012-06-04 | 2012-10-17 | 京信通信系统（中国）有限公司 | Automatic power-off protection method of repeater device |
| CN105871445A (en) * | 2015-01-23 | 2016-08-17 | 中国移动通信集团公司 | Repeater control method and device |
| CN109348506A (en) * | 2018-11-05 | 2019-02-15 | 上海创远仪器技术股份有限公司 | Realize that TD-SCDMA signal meets the method and system of switch time template determination processing in mobile communication system |
| CN112003641A (en) * | 2019-05-27 | 2020-11-27 | 中国移动通信有限公司研究院 | Radio frequency amplification device and network side equipment |
-
2007
- 2007-12-29 CN CNA2007101256227A patent/CN101232320A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102740338A (en) * | 2012-06-04 | 2012-10-17 | 京信通信系统（中国）有限公司 | Automatic power-off protection method of repeater device |
| CN102740338B (en) * | 2012-06-04 | 2015-07-29 | 京信通信系统（中国）有限公司 | A kind of Automatic power-off protection method of repeater device |
| CN105871445A (en) * | 2015-01-23 | 2016-08-17 | 中国移动通信集团公司 | Repeater control method and device |
| CN109348506A (en) * | 2018-11-05 | 2019-02-15 | 上海创远仪器技术股份有限公司 | Realize that TD-SCDMA signal meets the method and system of switch time template determination processing in mobile communication system |
| CN109348506B (en) * | 2018-11-05 | 2022-07-05 | 上海创远仪器技术股份有限公司 | Method and system for realizing TD-SCDMA signal satisfying switch time template decision processing in mobile communication system |
| CN112003641A (en) * | 2019-05-27 | 2020-11-27 | 中国移动通信有限公司研究院 | Radio frequency amplification device and network side equipment |
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