CN201657342U - ICS anti-interference repeater - Google Patents
ICS anti-interference repeater Download PDFInfo
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- CN201657342U CN201657342U CN2009202434048U CN200920243404U CN201657342U CN 201657342 U CN201657342 U CN 201657342U CN 2009202434048 U CN2009202434048 U CN 2009202434048U CN 200920243404 U CN200920243404 U CN 200920243404U CN 201657342 U CN201657342 U CN 201657342U
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Abstract
The utility model discloses an ICS anti-interference repeater which comprises a near-end machine and a far-end machine, wherein the near-end machine and the far-end machine respectively comprise two duplexers as well as a down link and an up link which are arranged between the two duplexers; the down link and the up link respectively comprise a low-noise amplifier, a first-level filter, a frequency converter, a second-level filter and a power amplifier which are sequentially connected in series; a DSP processor is arranged between the up link and the down link; the DSP processor comprises a feedback inhibition controller; a set of analog to digital converter and a digital to analog converter are sequentially arranged between the frequency converter and the second-level filter of the up link; and a set of analog to digital converter and a digital to analog converter are sequentially arranged between the frequency converter and the second-level filter of the down link. The ICS anti-interference repeater eliminates common-frequency self-excitation and interference, improves the system gain, enlarges the coverage area, is low in cost and strong in anti-interference capability, and has the function of preventing self-excitation and good stability.
Description
Technical field
The utility model relates to a kind of radio transmission system, relates in particular to the anti-interference repeater of a kind of ICS.
Background technology
Along with building up of China Mobile's network, each mobile operator with focus progressively transfer to optimization by networking to network.The self-excitation problem of wireless discharging-directly station is its weakness of using in engineering always, as everyone knows, output signal with the frequency repeating amplifier not exclusively is leaked to input owing to receiving and dispatching to isolate usually, amplifier signal passage and leakage signal passage constitute closed-loop system, if the loop multiplication factor is greater than 1, loop just is in the self-oscillation state, the hash of output high-power, whole working bandwidth is formed barrage jamming, usually cause large tracts of land call drop and can't inserting, however how long the repeater power amplifier can be burnt.In the time of more, though the multiplication factor of transmitting-receiving closed loop is less than 1, repeater no-self excitation vibration, but leakage signal causes bigger interference, make the signal C/I of forwarding not reach the 15dB threshold requirement that demodulation needs, still can not normal talking, though bring into use products such as RRU, optical fiber repeater to avoid these problems now, because RRU, optical fibre installation cost height, engineering construction difficulty are big.
ICS (Interference Cancellation System) is the self-excitation interference cancelling system, adopt digital processing technology, the mutual coupling that reduces between dual-mode antenna is disturbed, utilize the output of interference source, by cooperating of digital filter and adaptive algorithm, estimate interference value best, from the input that is mixed with interference, to deduct the interference valuation, the realization interference separates with signal integrity, the transmission characteristic of the anti-interference repeater of ICS automatic detection of leaks passage loop, go out and the same image signal of importing by leakage of interference in the repeater internal structure, deduct image signal at input signal, just reached the purpose that interference signal offsets, simultaneously when improving system gain, reduced the requirement of equipment to isolation, its performance and function satisfy the standard of conventional wireless discharging-directly station.
The utility model content
The purpose of this utility model just be to provide a kind of that address the above problem, cost is low, the anti-interference repeater of ICS that antijamming capability is strong, have anti-self-excitation function.
To achieve these goals, the technical solution adopted in the utility model is such: the anti-interference repeater of a kind of ICS, comprise near-end machine and remote termination, described near-end machine and remote termination include two duplexers and place two down link and up links between the duplexer, described down link and up link comprise the low noise amplifier of serial connection successively, the one-level filter, frequency converter, two-stage filter and power amplifier, between up link and down link, be provided with a dsp processor, described dsp processor comprises the feedback inhibition controller, between the frequency converter of up link and two-stage filter, be provided with one group of analog to digital converter and digital to analog converter successively, between the frequency converter of down link and two-stage filter, be provided with one group of analog to digital converter and digital to analog converter successively, the analog signal of frequency converter output is transformed into digital signal through analog to digital converter, after entering dsp processor and handling, two-stage filter is sent in output again.
As preferably: described feedback inhibition controller comprises first adder, second adder, filter, feedback controller, feedback filter and space feedback path, the first adder input connects analog to digital converter ADC and the output space ultramagnifier respectively, the first adder output connects the input of second adder and feedback controller respectively, the second adder output connects the input of filter and feedback controller respectively, input termination feedback filter, the output of filter connects feedback controller respectively, the input of feedback filter and space feedback path, the output of input termination feedback controller, the input of feedback filter connects the output of feedback controller and filter respectively.
Compared with prior art, advantage of the present utility model is:
1. eliminate with self-excitation frequently and interference, improve system gain, increase coverage,, reduced equipment effectively and introduced noise, all adopt modular structure, be easy to install, safeguard and control by digital processing.
2. equipment adopts the ICS technology, and antijamming capability is strong, have anti-self-excitation function, and isolation between transmitting and receiving antenna requires low.
3. employing dsp processor, the multi-channel parallel disposal ability is strong, and tracking velocity is fast, good stability.
4. cost is lower, applied range.
Description of drawings
Fig. 1 is a near-end machine theory diagram;
Fig. 2 is the remote termination theory diagram;
Fig. 3 is the schematic diagram of the feedback inhibition controller of embodiment 1.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment 1: arrive Fig. 3 referring to Fig. 1, the utility model comprises near-end machine and remote termination, described near-end machine and remote termination include two duplexers and place two down link and up links between the duplexer, described down link and up link comprise the low noise amplifier LNA of serial connection successively, the one-level filter, frequency converter, two-stage filter and power amplifier PA, between up link and down link, be provided with a dsp processor, described dsp processor comprises the feedback inhibition controller, between the frequency converter of up link and two-stage filter, be provided with one group of analog to digital converter ADC and digital to analog converter DAC successively, between the frequency converter of down link and two-stage filter, be provided with one group of analog to digital converter ADC and digital to analog converter DAC successively, the analog signal of frequency converter output is transformed into digital signal through analog to digital converter ADC, after entering dsp processor and handling, two-stage filter is sent in output again.
Described feedback inhibition controller comprises first adder, second adder, filter, feedback controller, feedback filter and space feedback path, the first adder input connects analog to digital converter ADC and the output space ultramagnifier respectively, the first adder output connects the input of second adder and feedback controller respectively, the second adder output connects the input of filter and feedback controller respectively, input termination feedback filter, the output of filter connects feedback controller respectively, the input of feedback filter and space feedback path, the output of input termination feedback controller, the input of feedback filter connects the output of feedback controller and filter respectively.
The digital signal that changes into through analog to digital converter ADC, through first, after second adder is handled, deduct the image signal of feedback filter output, its difference signal part is sent among the digital to analog converter DAC after by filter filtering, another part is delivered to feedback controller, some is delivered in the first adder by the space feedback path, feedback controller calculates the difference of the transmission characteristic of current mirror filter characteristic and actual leakage according to the difference signal of input signal and image signal, adopt relevant treatment to obtain the transmission characteristic of the closed loop of space feedback and forward transmitted link combinations, utilize feedback filter to offset the space feedback, revise the feedback filter characteristic in real time, the transmission characteristic of it and actual leakage is kept, and follow the tracks of its variation, thereby improved the equipment antijamming capability, the function of anti-self-excitation.
Claims (2)
1. anti-interference repeater of ICS, comprise near-end machine and remote termination, described near-end machine and remote termination include two duplexers and place two down link and up links between the duplexer, described down link and up link comprise low noise amplifier, one-level filter, frequency converter, two-stage filter and the power amplifier of serial connection successively, it is characterized in that: be provided with a dsp processor between up link and down link, described dsp processor comprises the feedback inhibition controller;
Between the frequency converter of up link and two-stage filter, be provided with one group of analog to digital converter and digital to analog converter successively;
Between the frequency converter of down link and two-stage filter, be provided with one group of analog to digital converter and digital to analog converter successively;
The analog signal of frequency converter output is transformed into digital signal through analog to digital converter, and after entering dsp processor and handling, two-stage filter is sent in output again.
2. the anti-interference repeater of ICS according to claim 1 is characterized in that: described feedback inhibition controller comprises first adder, second adder, filter, feedback controller, feedback filter and space feedback path;
The first adder input connects analog to digital converter ADC and the output space ultramagnifier respectively, and the first adder output connects the input of second adder and feedback controller respectively;
The second adder output connects the input of filter and feedback controller respectively, input termination feedback filter;
The output of filter connects the input of feedback controller, feedback filter and space feedback path respectively, the output of input termination feedback controller;
The input of feedback filter connects the output of feedback controller and filter respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202434048U CN201657342U (en) | 2009-11-23 | 2009-11-23 | ICS anti-interference repeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202434048U CN201657342U (en) | 2009-11-23 | 2009-11-23 | ICS anti-interference repeater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201657342U true CN201657342U (en) | 2010-11-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202434048U Expired - Fee Related CN201657342U (en) | 2009-11-23 | 2009-11-23 | ICS anti-interference repeater |
Country Status (1)
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| CN (1) | CN201657342U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103199913A (en) * | 2013-04-03 | 2013-07-10 | 福建京奥通信技术有限公司 | High-performance global-system-for-mobile-communication (GSM) option internet connection sharing (ICS) repeater |
| CN103916176A (en) * | 2013-01-04 | 2014-07-09 | 中国移动通信集团公司 | Wireless repeater and antenna calibration method thereof |
| WO2020103153A1 (en) * | 2018-11-23 | 2020-05-28 | 华普特科技（深圳）股份有限公司 | Radio signal transfer method and transfer apparatus |
-
2009
- 2009-11-23 CN CN2009202434048U patent/CN201657342U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103916176A (en) * | 2013-01-04 | 2014-07-09 | 中国移动通信集团公司 | Wireless repeater and antenna calibration method thereof |
| CN103199913A (en) * | 2013-04-03 | 2013-07-10 | 福建京奥通信技术有限公司 | High-performance global-system-for-mobile-communication (GSM) option internet connection sharing (ICS) repeater |
| CN103199913B (en) * | 2013-04-03 | 2016-06-29 | 福建京奥通信技术有限公司 | High-performance GSM frequency-selecting ICS repeater |
| WO2020103153A1 (en) * | 2018-11-23 | 2020-05-28 | 华普特科技（深圳）股份有限公司 | Radio signal transfer method and transfer apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101124 Termination date: 20121123 |