CN1314031A - Asynchronous power line transmission device - Google Patents
Asynchronous power line transmission device Download PDFInfo
- Publication number
- CN1314031A CN1314031A CN00801047A CN00801047A CN1314031A CN 1314031 A CN1314031 A CN 1314031A CN 00801047 A CN00801047 A CN 00801047A CN 00801047 A CN00801047 A CN 00801047A CN 1314031 A CN1314031 A CN 1314031A
- Authority
- CN
- China
- Prior art keywords
- pulse
- signal
- power line
- data signal
- data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/16—Electric signal transmission systems in which transmission is by pulses
- G08C19/22—Electric signal transmission systems in which transmission is by pulses by varying the duration of individual pulses
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5425—Methods of transmitting or receiving signals via power distribution lines improving S/N by matching impedance, noise reduction, gain control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5433—Remote metering
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5441—Wireless systems or telephone
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5445—Local network
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5429—Applications for powerline communications
- H04B2203/5458—Monitor sensor; Alarm systems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Dc Digital Transmission (AREA)
Abstract
An asynchronous power line transmission apparatus generates impulse radio data signals at rising edges and falling edges of data pulses and transmits the impulse radio data signals via a power line to other asynchronous power line transmission apparatus. Further, the asynchronous power line transmission apparatus receives impulse radio data signals transmitted from the other asynchronous power line transmission apparatus, clips levels of received positive and negative impulse radio data signals in order to remove a noise inserted into the received impulse radio data signals, respectively, reconstructs impulse pairs consisting of a positive set impulse from the positive impulse radio data signals and a positive reset impulse from the negative impulse radio data signals, and reproduces the data pulses transmitted from the other asynchronous power line transmission apparatus by selecting only a first pulse of each impulse pair if the selected pulse is a set pulse, a high level signal pulse is generated and if the selected pulse is a reset pulse, a low level pulse signal is generated.
Description
Technical field
The present invention relates to data transmission set, more particularly, the present invention relates to asynchronous power line transmission equipment by power line transmission impulse radio data-signal by network.
Background technology
Power line communication refers to utilizes the communication means of AC110V/220V power line as communication medium, and communication equipment passes through power line communication, and needn't set up extra telephone line or the special circuit that is used for data communication.
The power line transmission equipment that is used for power line communication is applied to the high speed power line communication modem, the power line communication apparatus of various transducers or driving arrangement, measure the sensor cluster of the physical parameter value of electric energy, water or gas, the structure high-speed communicating network (promptly, LAN etc.) or be used for industrial automation, the perhaps power line communication apparatus of the impressed field such as the Internet automatic telemetering.
Recently, for power line is used as communication channel, by FSK method or PSK method the power line transmission characteristic is studied.And present trend shows that the equipment that adopts these methods is dropped into actual the use.
Electric line communication system generally adopts carrier synchronization method to communicate.
But, the existing problem of communication means that is adopted according to the power line transmission equipment of routine techniques is, because the load variations that the on/off operation of the various electric equipments that link to each other with power line causes, and generation causes the reliability of communication to reduce from the intrinsic noise environment of electric equipment.
Promptly, because the noise circumstance around the power line and the cause of the load effect of the various loads that link to each other with power line, the communication means such as FSK or PSK that adopts between emission/receiving terminal is disadvantageous, impedance, be that line constant is greatly changed, thereby make signal transmission rate lower, input is not very reliable.Owing to line characteristic along with transmission channel or noise change, therefore be difficult to the signal of Synchronization Control by power line transmission, cause by the signal transmission rate of power line lowlyer, and the reliability of input is lower.
Therefore, in order to overcome load variations and noise circumstance, communication system should be antimierophonic, and should solve the problem of Synchronization Control.
In order to improve the problem that exists in this routine techniques, the present invention proposes the sinusoidal shock pulse (hereinafter referred to as " pulse data signal ") in a kind of 1-of transmission cycle, just, and pulse data signal.
It is ' 0 ' that pulse data signal refers to time average, and its burst length width is lower than the signal of tens nanoseconds (nsec), this signal has the impedance variation of not being subjected to, it is the influence that line constant changes, and the characteristic of being transmitted equably, impedance, the i.e. variation of line constant result from the ambient noise of power line, the work of various electric equipments and the variation of load.
Therefore, the purpose of this invention is to provide a kind of asynchronous power line transmission equipment, be used for the signal detecting method of the asynchronous system of pulse data signal transmission method by employing, this equipment can be reliably with ultrahigh speed transmission data, and this equipment can be constructed tranmission/reception apparatus simply.
Of the present invention open
In order to realize these and other advantage and according to purpose of the present invention, here in order fully to describe embodiments of the invention, a kind of asynchronous power line transmission equipment is provided, it comprises the radiating circuit with pulse data signal circuit, have and amplify and the level amplitude limiter receiving circuit of pulse data signal separation and checkout gear and pulse transcriber.The pulse data signal circuit is used for the data pulse that comes from the digital terminal such as personal computer is converted to pulse data signal, and by power line pulse data signal is transferred to the opposing party.Amplification and level amplitude limiter are used for receiving the pulse data signal that the opposing party launches by its receiving terminal by power line, eliminate noise, pulse data signal is amplified to certain level, and cuts the pulse data signal that is higher than certain level.Pulse data signal is separated with checkout gear and is used to separate corresponding to just just (+) pulse and negative (-) pulse of the commutation pulse of edge and negative edge.The pulse transcriber is used for pulse data signal is separated and just (+) pulse spacing and negative (-) pulse spacing of checkout gear are made as just (+) set pulse and just (+) reset pulse respectively, on the basis of time these pulses be arranged to corresponding to the set-reset pulse of 1-recurrent pulse data-signal to reset-set pulse is right, only select first right pulse of each pulse, if thereby the pulse of selecting is a set pulse, then produce the high level signal pulse, if and the pulse of selecting is a reset pulse, then produce the low level pulse signal, thereby reproduce the data converted pulse signal, and it is transferred to the PC interface.
In addition, in asynchronous power line transmission equipment of the present invention, the just edge of data pulse and negative edge are converted into the pulse data signal with mutual anti-phase current potential that will be transmitted, thereby can keep transmission characteristic consistently, and not be subjected to the influence of the load variations of background noise around the power line or power line.
Have again, in asynchronous power line transmission equipment of the present invention, though when the work that loads in the power line or when being changed, the level ratio amplitude of the random pulse noise pulse that can produce is the size high approximately 20～50 decibels (dB) (10～300 times) of the power line background noise of microvolt (μ V) order of magnitude, because the duration of microseismic noise pulse shows the low frequency characteristic of microsecond (μ sec) order of magnitude usually, therefore, can with this microseismic noise pulse with have the pulse data signal that the duration is lower than the high frequency characteristics of tens nanoseconds (nsec) and separate, and can eliminate this microseismic noise pulse by the frequency separation method.
Therefore, even if because the noise elimination apparatus of employing tandem type bi-level treatment frequency separation method is under the situation that special noise is at random arranged, also can eliminate noise fully, thereby greatly improved the data pulse transcriber and reproduced the reliability of data pulse, and be lower than the transceiver system of tens nanoseconds (nsec) by duration of pulse data signal, can realize ultrahigh speed transmission data.
Brief description of drawings
Accompanying drawing illustrates embodiments of the invention, and and explanation one be used from and explain that principle of the present invention, accompanying drawing are for the ease of further understanding the present invention, comprise in this manual, and constitute the part of this specification, wherein:
Fig. 1 is for adopting the conventional electric power line transfer system of prior art, the structural representation of its network;
Fig. 2 is the structural representation of power line transmission equipment of the present invention;
Fig. 3 is the oscillogram of input and output signal of each circuit of power line transmission equipment of the present invention shown in Figure 2.
Realize best mode of the present invention
Fig. 1 is the structural representation of the network of employing conventional electric power transmission system, and this conventional electric power transmission system comprises the single-phase two-wire power line 104 that is used to provide electric power, transmits and receives the power line transmission/ reception 103 and 105 of data by power line 104; And the interface arrangement 102 and 106 that between the terminal equipment such as personal computer 101 and 107, transmits and receive data.
Fig. 2 is the structural representation of power line transmission equipment of the present invention.
As shown in FIG., asynchronous power line transmission equipment of the present invention comprises: radiating circuit, form by impulse circuit 130 and pulse data signal circuit 135; Receiving circuit by received signal conversion and noise elimination apparatus 150, amplifies and level amplitude limiter 160, and pulse data signal is separated and checkout gear 170 and data pulse transcriber 180 compositions; With interface arrangement 120.Impulse circuit 130 is used for respectively the just edge and the negative edge of output pulse being converted to the heartbeat pulse (pulse signal) with constant duration, thereby transmit data pulse by the clock generator transmission of preset frequency, pulse data signal circuit 135 is used for the received pulse signal, and is converted into the pulse data signal that is suitable for by power line 140 transmission.Received signal conversion and noise elimination apparatus 150 are used for receiving the pulse data signal that spreads out of from the opposing party's (pulse data signal circuit 135) by power line 140, and eliminate its noise, amplification and level amplitude limiter 160 are used for the pulse data signal of received signal conversion and noise elimination apparatus 150 outputs is amplified to certain level, and cut the amplification pulse data signal that is higher than certain level, so that eliminate noise once more, pulse data signal is separated and checkout gear 170 is used for amplifying coming from and the output signal of level amplitude limiter 160 is separated into corresponding to the just edge of data pulse and just (+) pulse data signal and negative (-) pulse data signal of negative edge, and detect just (+) pulse data signal and negative (-) pulse data signal, data pulse transcriber 180 is used for separating from pulse data signal and just (+) pulse spacing of the pulse data signal of checkout gear output and bear (-) pulse spacing and be made as just (+) set pulse and just (+) reset pulse respectively, and on the basis of time, pulse be arranged to corresponding to the set-reset pulse of 1-recurrent pulse data-signal to reset-set pulse is right, and only selects first pulse of every paired pulses to reproduce data pulse signal.Interface arrangement 120 is used to make the impulse circuit 130 of radiating circuit and the data pulse transcriber 180 of receiving circuit to be complementary with personal computer (PC) 110.
The time average of pulse data signal is ' 0 ', is lower than tens nanosecond (nsec) its signal duration.In addition, pulse data signal is transmitted equably, is not subjected to power line background noise or impedance on every side, i.e. the influence of line constant variation, and impedance variation is produced by the work of the various electric equipments that link to each other with power line and the variation of load aspect thereof.
Pulse data signal circuit 135 comprises pulse converter.The pulse signal of pulse data signal circuit 135 outputs is by anti-phase mutually 1-cycle or sinusoidal shock pulse signal of 1/2-cycle.
To explain the operation and the effect of the asynchronous power line transmission equipment of the invention described above structure below.
When the clock generator of the PC 110 with certain message transmission rate produces and by interface 120 during to the data pulse shown in the radiating circuit transmission diagram 3A, the impulse circuit generation of radiating circuit has just (+) pulse corresponding to the predetermined lasting time of the just edge of this data pulse and negative edge, and outputs it to pulse data signal circuit 135.
When receiving the pulse data signal that comes from impulse circuit 130, as shown in Fig. 3 B, pulse data signal circuit 135 is converted to the just edge of data pulse just (+) and negative (-) (perhaps just (+) in 1/2-cycle) pulse data signal in the 1-cycle of duration from tens psecs (psec) to tens nanoseconds (nsec).
In addition, pulse data signal circuit 135 is converted to negative (-) in the 1-cycle of duration from tens psecs (psec) to tens nanoseconds (nsec) and (+) (perhaps negative (-) in 1/2-cycle) anti-phase (opposite with the phase place of the signal that obtains from edge just) pulse data signal just to the negative edge of data pulse.
Subsequently, pulse data signal circuit 135 is transferred to the opposing party to the pulse data signal that produces by power line 140.
Received signal conversion and noise elimination apparatus 150 detections are transmitted by power line 140, pulse data signal as shown in Fig. 3 B, receive data-signal by pulse converter, by utilizing tandem type two-stage frequency separation method, eliminate additional power line noise, output it to subsequently and amplify and level amplitude limiter 160.
When received signal conversion and noise elimination apparatus 150 are received pulse data signal, amplify and level amplitude limiter 160 is amplified to certain level to pulse data signal, and cut the amplification pulse data signal that is higher than certain level, so that the elimination noise.When amplitude limit, as shown in Fig. 3 C, just (+) amplitude limit pulse data signal is output as (+) phase pulse just, and bears (-) amplitude limit pulse data signal by anti-phase and be output, as shown in Fig. 3 D.
Just (+) pulse that pulse data signal is separated and checkout gear 170 separates with level amplitude limiter 160 amplifying and detect with bear (-) pulse (asserts signal and reset signal) and export to data pulse transcriber 180.
Subsequently, as shown in Fig. 3 E, data pulse transcriber 180 is arranged to just (+) pulse that separates and detect and negative (-) pulse (asserts signal and reset signal) and aligns (+) set and reset pulse and corresponding to one of 1-recurrent pulse data-signal and align (+) and reset and set pulse on time basis.
At this moment, 180 of data pulse transcribers are selected first right pulse of each pulse, thereby when the pulse of selecting is set pulse, data pulse transcriber 180 produces the high level pulse signal, and when the pulse of selecting was reset pulse, data pulse transcriber 180 produced the low level pulse signal, thereby reproduced the data pulse signal by power line transmission, and, the data pulse signal that reproduces is exported to PC110 by interface arrangement 120.
Asynchronous power line transmission equipment is by this way by power line transmission and receive data.
In according to the of the present invention asynchronous power line transmission equipment of working as mentioned above, when the load variations of power line, the amplitude of issuable random pulse noise pulse is higher, be about 20～50 decibels (dB), amplitude than the power line background noise of microvolt (μ V) order of magnitude is high 10～300 times, and the time width of microseismic noise pulse has the low frequency characteristic with microsecond (μ sec) expression.But,, therefore can eliminate noise pulse by carrying out filtering by the frequency separation method because the time width of pulse data signal has the high frequency characteristics that is lower than tens nanoseconds (nsec).
Therefore, consider special noise at random and adopt the noise elimination apparatus of the tandem type bi-level treatment of frequency separation method that can eliminate noise fully, like this, the data pulse transcriber just can reproduce data pulse reliably.In addition, owing to adopt the transmission time width to be lower than the cause of transmission method of the pulse data signal of tens nanoseconds (nsec), can transmit data with ultrahigh speed.
Industrial applicability
As mentioned above, according to asynchronous power line transmission equipment of the present invention since with respect to pass The defeated pulse data signal with certain hour width, the signal decay of power line is lower, electricity Signal degradation effect in the concentric connector of gas is lower, can transmit low level signal by power line. In addition, because the level of the signal of transmission is lower, can not produce electromagnetism (EMI) interference problem, And when transmitting data to remote place, can keep its invariable signal transmission special The property.
In addition, asynchronous power line transmission equipment can be applicable to the ultrahigh speed in 2～3 kilometers radiuses Power line communication network (LAN) structure, CCTV network structure, factory's automatic structure, Underground wireless relay network structure and household electrical appliance information network structure perhaps also can be applicable to control Make various dynamo-electric equipment, and be applied to domain of telemetry.
Since in the situation that does not break away from spirit of the present invention and basic characteristic, can be in many ways Realize the present invention, point out that above-described embodiment is not subjected to aforementioned unless therefore should understand specially Any details that illustrates limits, and that the additional claim of Ying Zairu limits is of the present invention Explain above-described embodiment in the spirit and scope, therefore, in all genus claim scopes All changes and modification, or be included in additional right with claim all should regarding as of being equal to and want Within asking.
Claims (7)
1. asynchronous power line transmission equipment, it comprises that the data pulse of the digital terminal output of a handle such as personal computer is converted to the pulse data signal with certain duration, and this pulse data signal is transferred to the opposing party's pulse data signal device.
2. according to the described equipment of claim 1, it also comprises a pulse data signal that is used to receive the opposing party's transmission, and cuts the level amplitude limiter of the received pulse data-signal that is higher than certain level.
3. according to the described equipment of claim 2, it also comprises and is used for level amplitude limit pulse data signal is separated into just (+) pulse data signal and negative (-) pulse data signal, and the pulse data signal separator of dateout pulse signal in view of the above.
4. according to the described equipment of claim 3, it also comprises an output signal that is used for behind the level amplitude limit, eliminates the noise elimination apparatus of noise pulse.
5. according to the described equipment of claim 4, it is characterized in that noise elimination apparatus adopts the frequency separation method to eliminate noise pulse.
6. according to the described equipment of claim 3, it also comprises signal reproducing apparatus, signal reproducing apparatus is on the basis of time, be made as corresponding to just (+) asserts signal in just (+) and negative (-) pulse spacing and reset signal corresponding to just (+) set-reset pulse of 1-recurrent pulse data-signal to reset with just (+)-set pulse is right, and the data pulse of transmission is reproduced in first the right pulse of only selecting each pulse.
7. according to the described equipment of claim 1, it is characterized in that the just edge of data pulse is set as just (+) and negative (-) pulse data signal in 1-cycle, and the negative edge of data pulse is made as anti-phase negative (-) in 1-cycle and (+) pulse data signal just, so that transmit.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1999-40687 | 1999-09-21 | ||
| KR1019990040687A KR100336638B1 (en) | 1999-09-21 | 1999-09-21 | Asynchronous power line transmission apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1314031A true CN1314031A (en) | 2001-09-19 |
Family
ID=19612453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00801047A Pending CN1314031A (en) | 1999-09-21 | 2000-01-22 | Asynchronous power line transmission device |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1135758A1 (en) |
| JP (1) | JP2003510867A (en) |
| KR (1) | KR100336638B1 (en) |
| CN (1) | CN1314031A (en) |
| AU (1) | AU2329200A (en) |
| IL (1) | IL139423A0 (en) |
| TW (1) | TW488137B (en) |
| WO (1) | WO2001022380A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104363033A (en) * | 2014-09-24 | 2015-02-18 | 宁波创元信息科技有限公司 | Power line communication technology adopting pulse modulation |
| CN110868242A (en) * | 2018-10-12 | 2020-03-06 | 鼎信信息科技有限责任公司 | Data acquisition method based on asynchronous communication |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3925213B2 (en) * | 2002-01-24 | 2007-06-06 | 富士通株式会社 | Leakage electromagnetic field suppression method and leakage electromagnetic field suppression transmission method and apparatus |
| KR20040023309A (en) * | 2002-09-11 | 2004-03-18 | 김재홍 | Power Line Communication Method and the Unit Using Asynchronous Special Frequency |
| GB2393370B (en) * | 2002-10-02 | 2004-10-20 | Artimi Ltd | Communication methods & apparatus |
| JP4565163B2 (en) * | 2006-04-28 | 2010-10-20 | 独立行政法人産業技術総合研究所 | Impulse transmission method and receiving apparatus |
| TWI401900B (en) * | 2008-04-21 | 2013-07-11 | Integrated Technology Express Inc | Method for partitioning a period according to noise characteristics |
| CN102820872A (en) * | 2012-08-27 | 2012-12-12 | 中国电子科技集团公司第五十四研究所 | Wireless low-jitter transmission method for digital asynchronous pulse |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4556864A (en) * | 1982-08-26 | 1985-12-03 | Roy Joseph J | Apparatus and method for communicating digital information on AC power lines |
| US4813057A (en) * | 1984-12-03 | 1989-03-14 | Charles A. Phillips | Time domain radio transmission system |
| US4953206A (en) * | 1986-11-17 | 1990-08-28 | At&T Bell Laboratories | Methods of and apparatus for providing substantially error-free transmitted data |
| JPH01190143A (en) * | 1988-01-26 | 1989-07-31 | Matsushita Electric Works Ltd | Data transmission system |
| JP2706481B2 (en) * | 1988-09-05 | 1998-01-28 | 松下電器産業株式会社 | Data transmission equipment |
| KR940009159B1 (en) * | 1992-01-16 | 1994-10-01 | 삼성전자 주식회사 | Color filter of lcd |
| JP2787976B2 (en) * | 1994-04-04 | 1998-08-20 | 株式会社アイオイ・システム | Two-wire transmission / reception communication method and apparatus |
-
1999
- 1999-09-21 KR KR1019990040687A patent/KR100336638B1/en not_active IP Right Cessation
-
2000
- 2000-01-22 AU AU23292/00A patent/AU2329200A/en not_active Abandoned
- 2000-01-22 IL IL13942300A patent/IL139423A0/en unknown
- 2000-01-22 EP EP00902167A patent/EP1135758A1/en not_active Withdrawn
- 2000-01-22 WO PCT/KR2000/000048 patent/WO2001022380A1/en not_active Application Discontinuation
- 2000-01-22 CN CN00801047A patent/CN1314031A/en active Pending
- 2000-01-22 JP JP2001525666A patent/JP2003510867A/en active Pending
- 2000-08-29 TW TW089117454A patent/TW488137B/en active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104363033A (en) * | 2014-09-24 | 2015-02-18 | 宁波创元信息科技有限公司 | Power line communication technology adopting pulse modulation |
| CN110868242A (en) * | 2018-10-12 | 2020-03-06 | 鼎信信息科技有限责任公司 | Data acquisition method based on asynchronous communication |
| CN110868242B (en) * | 2018-10-12 | 2022-04-19 | 南方电网数字电网研究院有限公司 | Data acquisition method based on asynchronous communication |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003510867A (en) | 2003-03-18 |
| KR20010028436A (en) | 2001-04-06 |
| IL139423A0 (en) | 2001-11-25 |
| AU2329200A (en) | 2001-04-24 |
| WO2001022380A1 (en) | 2001-03-29 |
| KR100336638B1 (en) | 2002-05-16 |
| EP1135758A1 (en) | 2001-09-26 |
| TW488137B (en) | 2002-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1864394B1 (en) | System and method for power line communications | |
| CN102474303A (en) | Power line communications apparatus | |
| CN1431798A (en) | Method and appts. for coding and decoding position sequence so as to transmit in line of normal telephone buisiness | |
| EP0289237A2 (en) | Improved manchester code receiver | |
| EP1433265A1 (en) | Method and apparatus for ultra wide-band communication system using multiple detectors | |
| CN1314031A (en) | Asynchronous power line transmission device | |
| EP1458159A1 (en) | Method and device of reducing a peak-to-average power ratio | |
| EP2813074B1 (en) | Variable impedance scheme for providing high speed wired communication | |
| CN1276632C (en) | Device and method for adjusting input gain for multiple signal formats in a data network | |
| CN111431833B (en) | Underwater current field communication method based on serial combination | |
| CN111431627B (en) | Dynamic frequency selection method and underwater current field communication method based on dynamic multi-carrier | |
| WO2007100633A9 (en) | High bandwidth data transport system | |
| Wright et al. | P2I-9 multi-channel data transfer using air-coupled capacitive ultrasonic transducers | |
| CN112187318A (en) | Pulse noise reduction method based on deep learning | |
| CN110661552A (en) | OFDM-based high-speed power line carrier acquisition method | |
| CN201303326Y (en) | DC wire carrier wave communication device | |
| CN111431835A (en) | Parallel multi-carrier-based high-efficiency underwater current field communication method | |
| CA1077632A (en) | Method and apparatus for operation of carbon microphones at low average current levels | |
| Hoch et al. | Interoperability of carrier-modulated OFDM systems with PRIME | |
| Saengudomlert et al. | Optimal sizing of QAM constellation for indoor optical wireless OFDM transmissions without bandwidth limitation | |
| KR20020019683A (en) | Asynchronous wireless communication apparatus of data pulse signal | |
| US5127024A (en) | Conversion filtering for digital signaling systems | |
| RU2100902C1 (en) | Device for reduction of pulse noise | |
| Gruenbacher et al. | N dimensional orthogonal QPSK signaling with discrete prolate spheroidal sequences | |
| Jamal et al. | Power efficiency improvement in CE-OFDM System with 0 dB IBO for transmission over PLC network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |