CN105577390A - Integrated point mode balise antenna system based on interference cancellation algorithm - Google Patents
Integrated point mode balise antenna system based on interference cancellation algorithm Download PDFInfo
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- CN105577390A CN105577390A CN201511001109.8A CN201511001109A CN105577390A CN 105577390 A CN105577390 A CN 105577390A CN 201511001109 A CN201511001109 A CN 201511001109A CN 105577390 A CN105577390 A CN 105577390A
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- 230000008054 signal transmission Effects 0.000 claims description 4
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- 230000015572 biosynthetic process Effects 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/06—Answer-back mechanisms or circuits
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Abstract
The embodiment of the invention provides an integrated point mode balise antenna system based on an interference cancellation algorithm. The system comprises a main vehicular BTM (Balise Transmission Module) device, a backup vehicular BTM device and a signal processing device; the main and backup vehicular BTM devices are started synchronously; the main vehicular BTM device receives external interference signals and uplink usable message signals through an antenna; the uplink usable message signals are transmitted by a ground balise; the backup vehicular BTM device receives the external interference signals through an antenna; the signal processing device carries out signal cancellation processing to the external interference signals and the uplink usable message signals transmitted by the main vehicular BTM device, and the external interference signals transmitted by the backup vehicular BTM device, thus obtaining uplink usable message signals. According to the technical solution of the integrated point mode balise antenna system based on the interference cancellation algorithm provided by the embodiment of the invention, the main and backup BTM devices are started synchronously under the condition of not increasing the economical burden; the interferences are cancelled; the signals are purified; the vehicular devices are protected; and the driving security of a train is ensured.
Description
Technical field
The present invention relates to train transponder technology field, particularly relate to a kind of integrated dot-mode transponder antenna system based on interference cancellation algorithm.
Background technology
Transponder transmission system, based on the radio-frequency recognition system of electromagnetic coupled mechanism, comprises vehicle-mounted BTM (BaliseTransmissionModule, transponder transmission unit) and ground transponder two parts.Usually, ground transponder is not in resting state through out-of-date at train, vehicle-mounted BTM then constantly launches the downstream driver signal of 27.095MHz, when train is through ground transponder, the energy activated ground transponder of this downstream driver signal RF, the message data that FSK (FrequencyShiftTelegraphy, frequency shift telegraphy) the uplink signal transmission device that ground transponder exports 4.234MHz stores, this message data is received by vehicle-mounted BTM antenna, realizes message transmissions.Vertical range between vehicle-mounted BTM antenna and ground transponder is required to meet 220mm ~ 460mm, and two antennas are all operated in its near-field region.
In actual applications, there is electromagnetic interference problem in transponder transmission system in engineer applied, easily causes mobile unit cisco unity malfunction, and reduce the operational efficiency of train, potential safety hazard is serious.
Summary of the invention
The embodiment provides a kind of integrated dot-mode transponder antenna system based on interference cancellation algorithm, to realize effectively eliminating the electromagnetic interference phenomenon existed in transponder transmission system.
To achieve these goals, this invention takes following technical scheme.
Based on an integrated dot-mode transponder antenna system for interference cancellation algorithm, comprising: the primary vehicle-mounted BTM equipment simultaneously enabled and vehicle-mounted BTM equipment for subsequent use, and signal handling equipment;
Described primary vehicle-mounted BTM equipment, for carrying out data communication with ground transponder, by the useful message signals of up link that antenna reception external interference signal and ground transponder transmit, described external interference signal and the useful message signals of up link are transferred to signal handling equipment;
Described for subsequent use vehicle-mounted BTM equipment, for receiving external interference signal, by described external interference Signal transmissions to signal handling equipment by antenna;
Described signal handling equipment, for carrying out circuit connection with described primary vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use, the external interference signal that the external interference signal of come to described primary vehicle-mounted BTM device transmission and the useful message signals of up link, described vehicle-mounted BTM device transmission for subsequent use are come carries out signal cancellation process, obtains the useful message signals of up link.
Preferably, described primary vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use are arranged on the bottom of train, and the spacing distance is mutually greater than the distance threshold of setting.
Preferably, described primary vehicle-mounted BTM equipment is identical with the transmission direction of the antenna of vehicle-mounted BTM equipment for subsequent use.
Preferably, described signal handling equipment comprises sef-adapting filter, the external interference signal that described sef-adapting filter is come to described primary vehicle-mounted BTM device transmission and the external interference signal that the useful message signals of up link, described vehicle-mounted BTM device transmission for subsequent use are come carry out Radio Frequency Interfere and offset process, obtain the useful message signals of up link.
Preferably, described sef-adapting filter, also for compensating the time delay produced in the signal cancellation processing procedure in the useful message signals of described up link, obtains the useful message signals of final up link.
The technical scheme provided as can be seen from the embodiment of the invention described above; embodiments providing a kind of integrated point type based on interference cancellation algorithm should based on the design of the integrated dot-mode transponder antenna system of interference cancellation algorithm; when realizing not increasing financial burden; enable primary and backup BTM antenna simultaneously; eliminate interference; purified signal, protection mobile unit, guarantees the safety of train driving.
The aspect that the present invention adds and advantage will part provide in the following description, and these will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of a kind of integrated dot-mode transponder antenna system based on interference cancellation algorithm that Fig. 1 provides for the embodiment of the present invention, in figure, primary vehicle-mounted BTM equipment, vehicle-mounted BTM equipment for subsequent use, signal handling equipment;
A kind of Vector modulation schematic diagram that Fig. 2 provides for the embodiment of the present invention;
A kind of orthogonal signalling synthesis schematic diagram that Fig. 3 provides for the embodiment of the present invention;
The Radio Frequency Interfere of a kind of sef-adapting filter that Fig. 4 provides for the embodiment of the present invention offsets process schematic diagram.
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 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.
For ease of the understanding to the embodiment of the present invention, be further explained explanation below in conjunction with accompanying drawing for several specific embodiment, and each embodiment does not form the restriction to the embodiment of the present invention.
The integration that the embodiment of the present invention provides adopts existing master vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use on train to work based on the integrated dot-mode transponder antenna system of interference cancellation algorithm simultaneously, by the metal existed around research dot-mode transponder antenna, comprise car body, bogie, be arranged on other equipment, rail etc. on bogie to the impact of antenna performance, without the need to changing existing equipment, while eliminating interference, greatly reduce expense, improve exploitativeness.
This embodiment offers a kind of structural representation of the integrated dot-mode transponder antenna system based on interference cancellation algorithm as shown in Figure 1, comprise following unit: the primary vehicle-mounted BTM equipment simultaneously enabled and vehicle-mounted BTM equipment for subsequent use, and signal handling equipment, signal handling equipment and primary vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use carry out wired or wireless communication line and are connected.
Primary vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use are all arranged on the bottom of train, and the spacing distance is mutually greater than the distance threshold of setting, and such as, this distance threshold is 4-8 rice.Primary vehicle-mounted BTM equipment is identical with the transmission direction of the antenna of vehicle-mounted BTM equipment for subsequent use, ensures that the signal that primary vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use receive is in the same way like this.
The normal form of antenna size demand fulfillment train of primary vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use, the consideration of the electromagnetic environment residing for comprehensive BTM, determines the size range that can meet BTM antenna standard;
Described primary vehicle-mounted BTM equipment, for enabling with vehicle-mounted BTM equipment for subsequent use simultaneously, when in train travelling process, primary vehicle-mounted BTM equipment is near the actionless ground transponder being arranged on ground, by the energy activated ground transponder of antenna transmission downstream driver signal RF, and ground transponder carries out data communication.By the useful message signals of up link that antenna reception external interference signal and ground transponder transmit, described external interference signal and the useful message signals of up link are transferred to signal handling equipment.Above-mentioned external interference signal comprises: ambient noise signal and electromagnetic interference signal.
Described for subsequent use vehicle-mounted BTM equipment, for receiving external interference signal, by described external interference Signal transmissions to signal handling equipment by antenna.
Described signal handling equipment, for carrying out circuit connection with described primary vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use, the external interference signal that the external interference signal of come to described primary vehicle-mounted BTM device transmission and the useful message signals of up link, described vehicle-mounted BTM device transmission for subsequent use are come carries out signal cancellation process, obtains the useful message signals of up link.
In actual applications, signal handling equipment can be sef-adapting filter, the external interference signal that described sef-adapting filter is come to described primary vehicle-mounted BTM device transmission and the external interference signal that the useful message signals of up link, described vehicle-mounted BTM device transmission for subsequent use are come carry out Radio Frequency Interfere and offset process, obtain the useful message signals of up link.
Described sef-adapting filter can also carry out coupling compensation optimizing to the time delay produced in the signal cancellation processing procedure in the useful message signals of described up link, obtains the useful message signals of final up link, thus eliminates interference to the full extent.This sef-adapting filter is strong tracking filfer, based on this, set up the estimation model of time-vary delay system, based on this model, directly time-vary delay system is carried out direct estimation as system mode by strong tracking filfer algorithm, thus obtain the value of time delay, guarantee that system reaches a state stablized, restrain faster.
A kind of Vector modulation schematic diagram that Fig. 2 provides for the embodiment of the present invention, as shown in Figure 2, the mathematical principle of radio frequency cancellation techniques is the synthesis superposition of vector.Interference signal can be compared as a vector in rectangular coordinate space, utilizes another and this vector to have the anti-phase vector of the constant amplitude of identical information feature to synthesize with it, thus offsets interference signal.In fig. 2, interference signal is vector A, with vector A carry out offsetting for regulate vector B, cancellation process is exactly regulate vector B to make it reach the process reverse with vector A constant amplitude.
A kind of orthogonal signalling synthesis schematic diagram that Fig. 3 provides for the embodiment of the present invention, the signal received as shown in Figure 3 is first by the quadrature bridge of 90 °, be decomposed into crossing I road and Q road, respectively I road and Q road signal are carried out to the phase shift of 0 ° or 180 ° again, and amplitude adjustment, last divide synthesis by merit in the same way again, the 360 ° of phase places adjustment and the amplitude that realize whole coordinate space adjust.
The Radio Frequency Interfere of a kind of sef-adapting filter that Fig. 4 provides for the embodiment of the present invention offsets process schematic diagram, as shown in Figure 4, reference input is input to sef-adapting filter, sef-adapting filter regulates filter coefficient automatically according to least mean square algorithm, namely when the mean square of error value that original input and sef-adapting filter export is minimum, sef-adapting filter is restrained, and namely the now output of filter be the best estimate of noise signal in original input.After original input deducts filter output, raw noise is just decayed, or is eliminated, thus obtains the best estimate of signal.
The useful message signals s of up link passes to the reception antenna of primary vehicle-mounted BTM equipment along channel, and except this signal, the reception antenna of primary vehicle-mounted BTM equipment also can receive an incoherent ambient noise signal n of signal therewith
0.The composite signal x=s+n that primary vehicle-mounted BTM equipment will receive
0be transferred to sef-adapting filter, as the original input of sef-adapting filter.The background noise n that vehicle-mounted BTM equipment for subsequent use will receive
0relevant noise signal n
1be transferred to sef-adapting filter, as the reference input of sef-adapting filter.Sef-adapting filter is by noise n
1filtered, make it produce and be approximately n
0output y.By this output from original input x=s+n
0in deduct, just produce the output s+n of system
0-y.
In sum; embodiments providing a kind of integrated point type based on interference cancellation algorithm should based on the design of the integrated dot-mode transponder antenna system of interference cancellation algorithm; when realizing not increasing financial burden; enable primary and backup BTM antenna simultaneously; eliminate interference; purified signal, protection mobile unit, guarantees the safety of train driving.
The embodiment of the present invention has broken two BTM antenna duplexers BTM in Traditional project application, but only has one as primary, and another is used to formula as thinking for subsequent use.Two BTM work simultaneously, such way, do not increase Financial cost, but better can carry out an elimination to interference, simultaneously, invention uses interference cancellation algorithm neatly, adopt radio frequency interference cancellation techniques, combine the Adaptable System of closed loop, compensate the time delay occurred in difference cancellation process, ensure that and with frequency same-phase, can really complete offseting of interference.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
As seen through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add required general hardware platform by software and realizes.Based on such understanding, technical scheme of the present invention can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product can be stored in storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform the method described in some part of each embodiment of the present invention or embodiment.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for device or system embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.Apparatus and system embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (5)
1. based on an integrated dot-mode transponder antenna system for interference cancellation algorithm, it is characterized in that, comprising: the primary vehicle-mounted BTM equipment simultaneously enabled and vehicle-mounted BTM equipment for subsequent use, and signal handling equipment;
Described primary vehicle-mounted BTM equipment, for carrying out data communication with ground transponder, by the useful message signals of up link that antenna reception external interference signal and ground transponder transmit, described external interference signal and the useful message signals of up link are transferred to signal handling equipment;
Described for subsequent use vehicle-mounted BTM equipment, for receiving external interference signal, by described external interference Signal transmissions to signal handling equipment by antenna;
Described signal handling equipment, for carrying out circuit connection with described primary vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use, the external interference signal that the external interference signal of come to described primary vehicle-mounted BTM device transmission and the useful message signals of up link, described vehicle-mounted BTM device transmission for subsequent use are come carries out signal cancellation process, obtains the useful message signals of up link.
2. the integrated dot-mode transponder antenna system based on interference cancellation algorithm according to claim 1, it is characterized in that, described primary vehicle-mounted BTM equipment and vehicle-mounted BTM equipment for subsequent use are arranged on the bottom of train, and the spacing distance is mutually greater than the distance threshold of setting.
3. the integrated dot-mode transponder antenna system based on interference cancellation algorithm according to claim 2, is characterized in that, described primary vehicle-mounted BTM equipment is identical with the transmission direction of the antenna of vehicle-mounted BTM equipment for subsequent use.
4. the integrated dot-mode transponder antenna system based on interference cancellation algorithm according to any one of claims 1 to 3, it is characterized in that, described signal handling equipment comprises sef-adapting filter, the external interference signal that described sef-adapting filter is come to described primary vehicle-mounted BTM device transmission and the external interference signal that the useful message signals of up link, described vehicle-mounted BTM device transmission for subsequent use are come carry out Radio Frequency Interfere and offset process, obtain the useful message signals of up link.
5. the integrated dot-mode transponder antenna system based on interference cancellation algorithm according to claim 4, is characterized in that:
Described sef-adapting filter, also for compensating the time delay produced in the signal cancellation processing procedure in the useful message signals of described up link, obtains the useful message signals of final up link.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511001109.8A CN105577390A (en) | 2015-12-28 | 2015-12-28 | Integrated point mode balise antenna system based on interference cancellation algorithm |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511001109.8A CN105577390A (en) | 2015-12-28 | 2015-12-28 | Integrated point mode balise antenna system based on interference cancellation algorithm |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112235073A (en) * | 2020-10-22 | 2021-01-15 | 维沃移动通信有限公司 | Interference signal cancellation method, driving integrated circuit and electronic device |
| CN114162183A (en) * | 2020-09-11 | 2022-03-11 | 比亚迪股份有限公司 | Train positioning processing method and device and train |
| CN115097361A (en) * | 2022-06-20 | 2022-09-23 | 中国舰船研究设计中心 | Self-adaptive spatial magnetic field environmental noise suppression method based on double sensors |
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| EP0331441A2 (en) * | 1988-03-01 | 1989-09-06 | Shaye Communications Limited | Waveform encoder/decoder |
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2015
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Patent Citations (5)
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|---|---|---|---|---|
| EP0228786A2 (en) * | 1985-12-23 | 1987-07-15 | Nippon Telegraph And Telephone Corporation | Radio signal interference cancellation system |
| EP0331441A2 (en) * | 1988-03-01 | 1989-09-06 | Shaye Communications Limited | Waveform encoder/decoder |
| CA2036481A1 (en) * | 1990-02-22 | 1991-08-23 | Ashok K. Talwar | Interference cancellation system having noise reduction features and method |
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Non-Patent Citations (1)
| Title |
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| 龚水清等: "冗余BTM天线最小安装距离研究", 《铁道学报》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114162183A (en) * | 2020-09-11 | 2022-03-11 | 比亚迪股份有限公司 | Train positioning processing method and device and train |
| CN114162183B (en) * | 2020-09-11 | 2023-03-14 | 比亚迪股份有限公司 | Train positioning processing method and device and train |
| CN112235073A (en) * | 2020-10-22 | 2021-01-15 | 维沃移动通信有限公司 | Interference signal cancellation method, driving integrated circuit and electronic device |
| CN115097361A (en) * | 2022-06-20 | 2022-09-23 | 中国舰船研究设计中心 | Self-adaptive spatial magnetic field environmental noise suppression method based on double sensors |
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Application publication date: 20160511 |