CN104639096A - Signal processing system based on frequency-adjustable band-pass filtering circuit - Google Patents
Signal processing system based on frequency-adjustable band-pass filtering circuit Download PDFInfo
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- CN104639096A CN104639096A CN201410714528.5A CN201410714528A CN104639096A CN 104639096 A CN104639096 A CN 104639096A CN 201410714528 A CN201410714528 A CN 201410714528A CN 104639096 A CN104639096 A CN 104639096A
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Abstract
The invention discloses a signal processing system based on a frequency-adjustable band-pass filtering circuit. The signal processing system comprises a receiving antenna, a filtering circuit, an amplifying circuit, an AD sampling circuit, a central controller, an attenuator, an amplifier, a transmission antenna and a reference clock, wherein the receiving antenna, the filtering circuit, the amplifying circuit, the AD sampling circuit, the central controller, the antenna, the amplifier and the transmission antenna are sequentially connected, and the AD sampling circuit is connected with the reference clock. Signal receiving and transmitting are integrated, signals are processed when receiving and can be filtered and amplified; via modulation and demodulation inside the central controller, signal processing is more complete, and system design is more precise. Meanwhile, signal to noise ratio is increased, purity and power of the signals are improved, and the signal processing system is ingenious in design and worthy of popularization.
Description
Technical field
The invention discloses a kind of signal processing system of the bandwidth-limited circuit based on frequency-adjustable, relate to signal processing technology field.
Background technology
Along with the development of the communication technology, the technical merit of signal processing system is also more and more improved, microwave communication is one of important modern communications means, compared with other communication modes, has message capacity large, construction speed is fast, steady quality, reliable communications, easy to maintenance, expense is relatively low, is easy to cross over the advantages such as complex-terrain.Therefore, supplementing as optical fiber communication, microwave communication plays an important role at Special zone.
Microwave communication (Microwave Communication), the communication using the electromagnetic wave-microwave of wavelength between 0.1 millimeter to 1 meter (frequency is 0.3 ~ 3GHz) to carry out, it mobile communication comprising terrestrial microwave relay communication, tropospheric scatter communica-tion, satellite communication, space communication and work in microwave frequency band, but tropospheric scatter communica-tion is less in China's application.Microwave communication does not need solid dielectric, when accessible in point-to-point transmission air line distance, just can use microwave transmission.Utilize microwave carry out communicating have that capacity is large, quality well and far distance can be reached, be therefore a kind of important communication means of national communication net, be also generally applicable to various private wire network.
But existing signal processing system is very numerous and diverse, in order to realize comparatively stable laser propagation effect, numerous and diverse degree of system not only with the addition of the complexity of design, too increases the cost of design, is not suitable for applying.
The patent No. is 201310443264.X, and patent name is a kind of antenna assembly and receiving system, although this patent has made improvement from design, cost cost is higher, and effect is not fairly obvious.
The patent No. is 201410024060.7, patent name is double antenna A-GNSS receiver system, this patent indicates existing antenna system Problems existing, and has carried out corresponding improvement and design from algorithm, but does not play corresponding effect on filtering clutter and signal amplify.
Summary of the invention
Technical problem to be solved by this invention is: for the defect of prior art, a kind of signal processing system of the bandwidth-limited circuit based on frequency-adjustable is provided, Signal reception and signal are launched set and are integrated by this system, process from Signal reception, filtering and amplification are carried out to signal, by the modulation and demodulation of central controller inside, more comprehensive to the process of signal, system is more rigorous, not only increase signal to noise ratio, improve degree of purity and the power of signal, design ingenious, be worthy to be popularized.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of signal processing system of the bandwidth-limited circuit based on frequency-adjustable, comprise reception antenna, filter circuit, amplifying circuit, AD sample circuit, central controller, attenuator, amplifier, transmitting antenna and reference clock, wherein reception antenna, filter circuit, amplifying circuit, AD sample circuit, central controller, attenuator, amplifier, transmitting antenna are connected successively, and described AD sample circuit is also connected with reference clock;
Reception antenna Received signal strength, send signal to the process that filter circuit carries out filtering clutter, signal after filtering enters amplifying circuit and carries out signal amplification, signal carries out AD sampling through being amplified into AD sample circuit, signal after sampling is sent to central controller, by central controller, signal is analyzed, demodulation is carried out to signal, central controller is analyzed the signal after demodulation and is compensated signal, signal is after treatment modulated, and amplify by entering amplifier after attenuator attenuates, enter transmitting antenna and carry out signal transmitting.
Described filter circuit is the bandwidth-limited circuit of frequency-adjustable, comprises first, second amplifier, first to the 7th resistance, first to the 3rd electric capacity and adjustable resistance, wherein, the input of the bandwidth-limited circuit of frequency-adjustable is through one end of the first resistance respectively with the second resistance, one end of 3rd resistance, one end of first electric capacity, one end of second electric capacity is connected, the other end ground connection of the 3rd resistance, one end of the other end the respectively with four resistance of the first electric capacity, the stiff end of adjustable resistance is connected, the other end of the other end respectively with the second electric capacity of the 4th resistance, the negative input end of the first amplifier is connected, the positive input terminal ground connection of the first amplifier, the output of the first amplifier respectively with the adjustable end of adjustable resistance, one end of 5th resistance is connected, the negative input end of the other end respectively with the second amplifier of the 5th resistance, one end of 6th resistance, one end of 3rd electric capacity is connected, the positive input terminal of the second amplifier through the 7th grounding through resistance, the other end of output respectively with the second resistance of the second amplifier, the other end of the 6th resistance, the other end of the 3rd electric capacity is connected and the output of bandwidth-limited circuit as frequency-adjustable.
As further prioritization scheme of the present invention, described reception antenna adopts micro-strip paster antenna.
As further prioritization scheme of the present invention, described central controller adopts single-chip microcomputer.
As further prioritization scheme of the present invention, described transmitting antenna adopts dipole antenna.
As further prioritization scheme of the present invention, the chip model that described AD sample circuit adopts is MAX197.
The present invention adopts above technical scheme compared with prior art, there is following technique effect: Signal reception and signal are launched set and be integrated by native system, process from Signal reception, filtering and amplification are carried out to signal, by the modulation and demodulation of central controller inside, more comprehensive to the process of signal, system is more rigorous, not only increases signal to noise ratio, improves degree of purity and the power of signal, design ingenious, be worthy to be popularized.
Accompanying drawing explanation
Fig. 1 is system configuration schematic diagram of the present invention.
Fig. 2 is in the present invention, the physical circuit figure of filter circuit,
Wherein: R1 to R7 is respectively the first to the 7th resistance, C1 to C3 is respectively the first to the 3rd electric capacity, A1 and A2 is respectively first, second amplifier, and RL is adjustable resistance.
Embodiment
Be described below in detail embodiments of the present invention, the example of described execution mode is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the execution mode be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
Those skilled in the art of the present technique are understandable that, the correlation module related in the present invention and the function of realization thereof are the devices of hardware after improvement and formation thereof, device or system carry computer software programs conventional in prior art or pertinent protocols just can realize, and are not improve computer software programs of the prior art or pertinent protocols.Such as, the computer hardware system after improvement still can realize the specific function of this hardware system by loading existing operation system of software.Therefore, be understandable that, innovation of the present invention is the improvement of hardware module in prior art and connects syntagmatic, but not be only in hardware module for realizing the improvement of software or the agreement of carrying about function.
Those skilled in the art of the present technique are understandable that, the correlation module mentioned in the present invention is the one or more hardware device for performing in step in operation, method, flow process described in the application, measure, scheme.Described hardware device for required object and specialized designs and manufacture, or also can adopt the known device in all-purpose computer or other known hardware devices.Described all-purpose computer activates or reconstructs with having storage procedure Selection within it.
Those skilled in the art of the present technique are appreciated that unless expressly stated, and singulative used herein " ", " one ", " described " and " being somebody's turn to do " also can comprise plural form.Should be further understood that, the wording used in specification of the present invention " comprises " and refers to there is described feature, integer, step, operation, element and/or assembly, but does not get rid of and exist or add other features one or more, integer, step, operation, element, assembly and/or their group.Should be appreciated that, when we claim element to be " connected " or " coupling " to another element time, it can be directly connected or coupled to other elements, or also can there is intermediary element.In addition, " connection " used herein or " coupling " can comprise wireless connections or couple.Wording "and/or" used herein comprises one or more arbitrary unit listing item be associated and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
Figure of the present invention as shown in Figure 1, a kind of signal processing system of the bandwidth-limited circuit based on frequency-adjustable, comprise reception antenna, filter circuit, amplifying circuit, AD sample circuit, central controller, attenuator, amplifier, transmitting antenna and reference clock, wherein reception antenna, filter circuit, amplifying circuit, AD sample circuit, central controller, attenuator, amplifier, transmitting antenna are connected successively, and described AD sample circuit is also connected with reference clock;
Reception antenna Received signal strength, send signal to the process that filter circuit carries out filtering clutter, signal after filtering enters amplifying circuit and carries out signal amplification, signal carries out AD sampling through being amplified into AD sample circuit, signal after sampling is sent to central controller, by central controller, signal is analyzed, demodulation is carried out to signal, central controller is analyzed the signal after demodulation and is compensated signal, signal is after treatment modulated, and amplify by entering amplifier after attenuator attenuates, enter transmitting antenna and carry out signal transmitting.
In the present invention, as shown in Figure 2, described filter circuit is the bandwidth-limited circuit of frequency-adjustable to the physical circuit figure of filter circuit, comprises first, second amplifier, first to the 7th resistance, first to the 3rd electric capacity and adjustable resistance, wherein, the input of the bandwidth-limited circuit of frequency-adjustable is through one end of the first resistance respectively with the second resistance, one end of 3rd resistance, one end of first electric capacity, one end of second electric capacity is connected, the other end ground connection of the 3rd resistance, one end of the other end the respectively with four resistance of the first electric capacity, the stiff end of adjustable resistance is connected, the other end of the other end respectively with the second electric capacity of the 4th resistance, the negative input end of the first amplifier is connected, the positive input terminal ground connection of the first amplifier, the output of the first amplifier respectively with the adjustable end of adjustable resistance, one end of 5th resistance is connected, the negative input end of the other end respectively with the second amplifier of the 5th resistance, one end of 6th resistance, one end of 3rd electric capacity is connected, the positive input terminal of the second amplifier through the 7th grounding through resistance, the other end of output respectively with the second resistance of the second amplifier, the other end of the 6th resistance, the other end of the 3rd electric capacity is connected and the output of bandwidth-limited circuit as frequency-adjustable.
As further prioritization scheme of the present invention, described reception antenna adopts micro-strip paster antenna.
As further prioritization scheme of the present invention, described central controller adopts single-chip microcomputer, and the present invention not only improves many from hardware, and is provided with backoff algorithm in central controller inside, can repair, make signal more accurate to the error of signal.
As further prioritization scheme of the present invention, described transmitting antenna adopts dipole antenna, and the design accuracy of dipole antenna is higher, and the impact brought signal itself is little, and the transmitting of signal can be made more accurate.
As further prioritization scheme of the present invention, the chip model that described AD sample circuit adopts is MAX197.
By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned execution mode, in the ken that those of ordinary skill in the art possess, can also makes a variety of changes under the prerequisite not departing from present inventive concept.The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to the present invention, although the present invention discloses as above with preferred embodiment, but and be not used to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, make a little change when the technology contents of above-mentioned announcement can be utilized or be modified to the Equivalent embodiments of equivalent variations, in every case be do not depart from technical solution of the present invention content, according to technical spirit of the present invention, within the spirit and principles in the present invention, to any simple amendment that above embodiment is done, equivalent replacement and improvement etc., within the protection range all still belonging to technical solution of the present invention.
Claims (5)
1. the signal processing system based on the bandwidth-limited circuit of frequency-adjustable, it is characterized in that: comprise reception antenna, filter circuit, amplifying circuit, AD sample circuit, central controller, attenuator, amplifier, transmitting antenna and reference clock, wherein reception antenna, filter circuit, amplifying circuit, AD sample circuit, central controller, attenuator, amplifier, transmitting antenna are connected successively, and described AD sample circuit is also connected with reference clock;
Reception antenna Received signal strength, send signal to the process that filter circuit carries out filtering clutter, signal after filtering enters amplifying circuit and carries out signal amplification, signal carries out AD sampling through being amplified into AD sample circuit, signal after sampling is sent to central controller, is analyzed and demodulation, compensate afterwards to signal by central controller to signal, signal through above-mentioned process is modulated by attenuator and amplifier more successively, finally enters transmitting antenna and carries out signal transmitting;
Described filter circuit is the bandwidth-limited circuit of frequency-adjustable, comprises first, second amplifier, the first to the 7th resistance, the first to the 3rd electric capacity and adjustable resistance, wherein,
The input of the bandwidth-limited circuit of frequency-adjustable is through one end of the first resistance respectively with the second resistance, one end of 3rd resistance, one end of first electric capacity, one end of second electric capacity is connected, the other end ground connection of the 3rd resistance, one end of the other end the respectively with four resistance of the first electric capacity, the stiff end of adjustable resistance is connected, the other end of the other end respectively with the second electric capacity of the 4th resistance, the negative input end of the first amplifier is connected, the positive input terminal ground connection of the first amplifier, the output of the first amplifier respectively with the adjustable end of adjustable resistance, one end of 5th resistance is connected, the negative input end of the other end respectively with the second amplifier of the 5th resistance, one end of 6th resistance, one end of 3rd electric capacity is connected, the positive input terminal of the second amplifier through the 7th grounding through resistance, the other end of output respectively with the second resistance of the second amplifier, the other end of the 6th resistance, the other end of the 3rd electric capacity is connected and the output of bandwidth-limited circuit as frequency-adjustable.
2. the signal processing system of a kind of bandwidth-limited circuit based on frequency-adjustable according to claim 1, is characterized in that: described reception antenna adopts micro-strip paster antenna.
3. the signal processing system of a kind of bandwidth-limited circuit based on frequency-adjustable according to claim 1, is characterized in that: described central controller adopts single-chip microcomputer.
4. the signal processing system of a kind of bandwidth-limited circuit based on frequency-adjustable according to claim 1, is characterized in that: described transmitting antenna adopts dipole antenna.
5. the signal processing system of a kind of bandwidth-limited circuit based on frequency-adjustable according to claim 1, is characterized in that: the chip model that described AD sample circuit adopts is MAX197.
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| CN201410714528.5A CN104639096A (en) | 2014-12-02 | 2014-12-02 | Signal processing system based on frequency-adjustable band-pass filtering circuit |
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| CN201410714528.5A CN104639096A (en) | 2014-12-02 | 2014-12-02 | Signal processing system based on frequency-adjustable band-pass filtering circuit |
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Cited By (1)
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| CN109100625A (en) * | 2018-10-29 | 2018-12-28 | 国网河北省电力有限公司电力科学研究院 | A kind of detection circuit for partial discharge and detector |
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| US20040266369A1 (en) * | 2003-06-30 | 2004-12-30 | Mccallister Ronald D. | Methods and apparatus for controlling signals |
| CN102098065A (en) * | 2009-12-11 | 2011-06-15 | 无锡华润矽科微电子有限公司 | Band-pass filter receiving device and control method thereof |
| CN103152003A (en) * | 2013-01-18 | 2013-06-12 | 西安电子科技大学 | Ultra-wide band electrically-tunable band-pass filter set and frequency control method thereof |
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| US20040266369A1 (en) * | 2003-06-30 | 2004-12-30 | Mccallister Ronald D. | Methods and apparatus for controlling signals |
| CN102098065A (en) * | 2009-12-11 | 2011-06-15 | 无锡华润矽科微电子有限公司 | Band-pass filter receiving device and control method thereof |
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| CN109100625A (en) * | 2018-10-29 | 2018-12-28 | 国网河北省电力有限公司电力科学研究院 | A kind of detection circuit for partial discharge and detector |
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