CN201674468U - Anti-interference power amplification system - Google Patents
Anti-interference power amplification system Download PDFInfo
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- CN201674468U CN201674468U CN2010202232833U CN201020223283U CN201674468U CN 201674468 U CN201674468 U CN 201674468U CN 2010202232833 U CN2010202232833 U CN 2010202232833U CN 201020223283 U CN201020223283 U CN 201020223283U CN 201674468 U CN201674468 U CN 201674468U
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- lna
- power amplifier
- interference
- duplexer
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Abstract
The utility model belongs to the radio communication field, especially to an anti-interference power amplification system. The amplification system mainly comprises a diplexer, a low noise amplifier, an intelligent counteracting module, a power amplifier and an intelligent monitoring module; the intelligent counteracting module comprises an FPG and a DSP, wherein the FPGA communicates with the DSP. The system of the utility model can receive base station signals, and process and amplify the signals by inside processing; can process and amplify the mobile phone signals received from weak covering zone, and send the signals back to the base station; and can prevent interference and control self-excitation in the amplification process to achieve the optimization effect to the signals in weak covering zone.
Description
Technical field:
The utility model relates to wireless communication field, especially a kind of anti-interference power amplifying system.
Background technology:
Along with building up of China Mobile's network, each mobile operator with focus progressively transfer to optimization by networking to network; Wireless discharging-directly station is with its low cost, and adaptive capacity is strong, product diversification, becomes a member important in the network optimization product; But wireless discharging-directly station exists interference and self-excitation problem when engineering is used, and common wireless discharging-directly station can not satisfy the standard that the network optimization is built.
The utility model content:
The purpose of this utility model just is the deficiency at above-mentioned technology, and a kind of anti-interference power amplifying system is provided, and it not only can be anti-interference, and can also solve the self-excitation problem, can satisfy the demand that the network optimization is built.
The technical solution of the utility model is:
A kind of anti-interference power amplifying system, it mainly comprises duplexer, LNA, intelligent cancellation module, power amplifier, intelligent monitored control module, the duplexer at two ends links to each other with service antenna with the donation antenna respectively, exist between two duplexers by LNA, uplink and downlink dual link that intelligent cancellation module, power amplifier and ALC constituted, LNA, intelligent cancellation module, power amplifier link to each other successively, bridging ALC between LNA and the power amplifier; Described intelligent cancellation module, it comprises FPGA and DSP, FPGA communicates by letter with DSP; Isolation between described donation antenna and the service antenna is not less than gain 15db; Described duplexer adopts miniature ultra-thin FBAR duplexer; Described LNA adopts high integrated anti-interference amplification module; Described power amplifier adopts ultra-linear amplifier.
The beneficial effects of the utility model are:
It can receive base station signal the utility model, and by inter-process signal is handled amplification; The weak area of coverage mobile phone signal that also will receive is handled and is amplified, and returns the base station; Anti-interference, the control self-excitation of energy in amplification process; Reach optimization function to weak area of coverage signal.
Description of drawings:
Below in conjunction with drawings and Examples further to the utility model explanation.
Fig. 1 is a structured flowchart of the present utility model.
Fig. 2 is the utility model intelligence cancellation module schematic diagram.
Fig. 3 is the utility model FPGA and DSP combining structure block diagram.
Embodiment:
As Figure 1-3, a kind of anti-interference power amplifying system, it mainly comprises duplexer, LNA, intelligent cancellation module, power amplifier, intelligent monitored control module, the duplexer at two ends links to each other with service antenna with the donation antenna respectively, exist between two duplexers by LNA, uplink and downlink dual link that intelligent cancellation module, power amplifier and ALC constituted, LNA, intelligent cancellation module, power amplifier link to each other successively, bridging ALC between LNA and the power amplifier;
Described intelligent cancellation module, it comprises FPGA and DSP, and FPGA and DSP full digital processing technology are applied to intelligent cancellation module, uses this technology on adder, filter, feedback controller respectively, realize the multiplication and the low-pass filtering link of operand maximum, can solve latency issue; Adopt the mixing of FPGA Parallel Implementation operand maximum to multiply each other and the low-pass filtering link, improve integral operation speed, fundamental frequency and 2 frequency-doubled signals that colleague's generation phase carrier, mixing are multiplied each other; Adopt that DSP realizes differential, multiplication cross, subtracts each other, integration and High frequency filter link, carry out computing by adopting floating number, improved demodulation accuracy, the concrete interrupt mode that adopts communicates between DSP and the FPGA; Described intelligent cancellation module adopts PGC (phase carrier) demodulation techniques as dynamically offsetting the control account form:
PGC[1] demodulation techniques generally are used for eliminating the both arms interferometer because the phase drift that environmental factor causes is introduced phase carrier signal Ccos ω 0t in interferometer, then interfere output to be:
I1＝A+Bcos(Ccosω0t+φ(t))
In the formula: A is a direct current biasing, and B is the interference term amplitude, and C is a carrier amplitude, and ω 0 is a carrier angular frequencies, φ (t)=D cos ω St+ φ (t), and D cos ω St is measured signal, and D is the measured signal amplitude, and ω S is the measured signal angular frequency, and φ (t) is a phase drift;
Use carrier wave fundamental frequency Gcos ω 0t and 2 frequency multiplication Hcos2 ω 0t respectively to interfering output to carry out that mixing is multiplied each other and low-pass filtering, obtain:
I2＝-BGJ1(C)sinφ(t)
I3＝-BHJ2(C)cosφ(t)
In the formula: G is a carrier wave fundamental frequency amplitude, and H is 2 frequency multiplication amplitudes, and J1 J2 is the 1st rank, the 2nd rank Bessel function;
Carry out differential respectively for I2, I3, obtain:
I4＝-BGJ1(C)φ′(t)cosφ(t)
I5＝-BHJ2(C)φ′(t)sinφ(t)
The multiplication cross of I3*I4, I2*I5 then obtains:
I6＝B2GHJ1(C)J2(C)φ′(t)cos2φ(t)
I7＝-B2GHJ1(C)J2(C)φ′(t)sin2φ(t)
Deduct I7 with I6 again, obtain:
I8＝B2GHJ1(C)J2(C)φ′(t)
To carrying out integration, obtain:
I9＝B2GHJ1(C)J2(C)φ(t)
I9 is carried out high-pass filtering, obtains:
I10＝B2GHJ1(C)J2(C)DcosωSt
Be that measured signal Dcos ω St is accessed by global solution, eliminated the influence of φ (t) simultaneously;
Described duplexer adopts miniature ultra-thin FBAR duplexer; Described LNA adopts high integrated anti-interference amplification module; Described power amplifier adopts ultra-linear amplifier.
The utility model is by digital processing, and the transmission characteristic in acquisition tracking external leakage path, this transmission characteristic can be equivalent to a FIR filter (mirror filter); The signal input FIR filter that will send, ideally outside leakage signal is just the same in output of FIR filter and the received signal, so just can cut the output of FIR filter in input signal, thereby suppresses to disturb; Since the external leakage environment be unknown with change, anti-interference amplification system needs mirror at first to catch the transmission characteristic of leakage path in the feedback inhibition align mode, and constantly follows the tracks of external environment condition change when operate as normal.
In the feedback inhibition align mode, entire circuit disconnects, and transmitting is random signal, and intelligent cancellation module circuit is during this period of time caught the external environment condition parameter fast.The feedback inhibition align mode continues the 2-3S time.Enter feedback inhibition tracking mode, normal transmission service signal after the feedback inhibition align mode.
Control method to self-excitation phenomena:
Self-excitation at first makes signal amplitude increase unusually; In the utility model, each frequency-selecting passage all can be set a power threshold according to the power and the gain allocation of this passage, has a modified gain that dynamic control to channel gain is provided; Usually modified gain is 0db, and the nominal gain that whole channel gain equals to set just reduces modified gain fast in case signal power surpasses thresholding, and whole channel gain is descended; Otherwise, if signal power is lower than certain thresholding, modified gain is lower than 0db, also can modified gain slowly be gone up; Surpass 24db if modified gain descends, enter the feedback inhibition align mode with regard to control circuit, the interrupting service signal transmits, and catches the transmission characteristic of leakage path again; In fact can enter the feedback inhibition align mode except firm start, seldom might enter the feedback inhibition align mode At All Other Times, because modified gain can be reduced to the circuit self-excitation is eliminated, the isolation of offering this moment between antenna and the service antenna is not less than gain 15db, and it is normal that signal amplitude is recovered, in case and signal amplitude is normal, do not overflow or saturated, the ICS tracking circuit can capture correct environmental parameter, eliminates interference signal, detect signal power and reduce, modified gain is gone up.
Claims (4)
1. anti-interference power amplifying system is characterized in that:
It mainly comprises duplexer, LNA, intelligent cancellation module, power amplifier, intelligent monitored control module, the duplexer at two ends links to each other with service antenna with the donation antenna respectively, exist between two duplexers by LNA, uplink and downlink dual link that intelligent cancellation module, power amplifier and ALC constituted, LNA, intelligent cancellation module, power amplifier link to each other successively, bridging ALC between LNA and the power amplifier;
Described intelligent cancellation module, it comprises FPGA and DSP, FPGA communicates by letter with DSP;
Isolation between described donation antenna and the service antenna is not less than gain 15db.
2. a kind of anti-interference power amplifying system according to claim 1 is characterized in that: described duplexer adopts miniature ultra-thin FBAR duplexer.
3. a kind of anti-interference power amplifying system according to claim 1 is characterized in that: described LNA adopts high integrated anti-interference amplification module.
4. a kind of anti-interference power amplifying system according to claim 1 is characterized in that: described power amplifier adopts ultra-linear amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202232833U CN201674468U (en) | 2010-06-11 | 2010-06-11 | Anti-interference power amplification system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202232833U CN201674468U (en) | 2010-06-11 | 2010-06-11 | Anti-interference power amplification system |
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| Publication Number | Publication Date |
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| CN201674468U true CN201674468U (en) | 2010-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202232833U Expired - Fee Related CN201674468U (en) | 2010-06-11 | 2010-06-11 | Anti-interference power amplification system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113726397A (en) * | 2021-08-24 | 2021-11-30 | 昂科信息技术（上海）股份有限公司 | Anti-interference self-adaptive trunk amplifier, system and signal processing system |
-
2010
- 2010-06-11 CN CN2010202232833U patent/CN201674468U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113726397A (en) * | 2021-08-24 | 2021-11-30 | 昂科信息技术（上海）股份有限公司 | Anti-interference self-adaptive trunk amplifier, system and signal processing system |
| CN113726397B (en) * | 2021-08-24 | 2022-08-16 | 昂科信息技术（上海）股份有限公司 | Anti-interference self-adaptive trunk amplifier, system and signal processing system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHENGDU FULANTE CO., LTD. Free format text: FORMER OWNER: ZHANG BO Effective date: 20140117 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 610006 CHENGDU, SICHUAN PROVINCE TO: 610041 CHENGDU, SICHUAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140117 Address after: 610041 No. 310, No. 6, building B, No. nine Hing Road, Chengdu high tech Zone, Sichuan, China Patentee after: Chengdu Fulante Co., Ltd. Address before: Wuhou District Shuangnan road Chengdu City, Sichuan province 610006 5 unit 4, No. 22 Patentee before: Zhang Bo |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20160611 |