CN108243140A - A kind of targeting signal detection method and device - Google Patents
A kind of targeting signal detection method and device Download PDFInfo
- Publication number
- CN108243140A CN108243140A CN201810053365.9A CN201810053365A CN108243140A CN 108243140 A CN108243140 A CN 108243140A CN 201810053365 A CN201810053365 A CN 201810053365A CN 108243140 A CN108243140 A CN 108243140A
- Authority
- CN
- China
- Prior art keywords
- frequency
- signal
- frequency domain
- domain
- attenuation
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2649—Demodulators
- H04L27/265—Fourier transform demodulators, e.g. fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2656—Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2669—Details of algorithms characterised by the domain of operation
- H04L27/2672—Frequency domain
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2673—Details of algorithms characterised by synchronisation parameters
- H04L27/2675—Pilot or known symbols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2681—Details of algorithms characterised by constraints
- H04L27/2688—Resistance to perturbation, e.g. noise, interference or fading
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/0054—Detection of the synchronisation error by features other than the received signal transition
- H04L7/007—Detection of the synchronisation error by features other than the received signal transition detection of error based on maximum signal power, e.g. peak value, maximizing autocorrelation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Discrete Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The present invention provides targeting signal detection method in a kind of broadband power line ofdm communication system, and this method includes obtaining the first frequency-region signal after carrying out the original leading symbol of anti-pleat Fourier transformation；It obtains the first time-domain signal in the communication channel and carries out the second frequency-region signal that Fourier transformation obtains；Signal attenuation frequency domain character and interference frequency domain character in acquisition of communication channels；The second time-domain signal is obtained after carrying out inverse Fourier transform according to the result after the attenuation frequency domain characteristic, the interference frequency domain characteristic, first frequency-region signal, second frequency-region signal progress calculation process.The purpose of the present invention is improving the success rate that targeting signal detects in broadband power line ofdm communication system, false detection rate is reduced.
Description
Technical field
The present invention relates to a kind of communication means, and in particular to a kind of targeting signal detection method and device.
Background technology
It is telecommunication media that low-voltage power line network, which makes finger utilize low-voltage power line, and the data after carrier modulation are carried out long distance
Network from transmission.The characteristics of LV-PLC channel is that interference is strong, and channel-selective attenuation is big, and attenuation and communication
Distance dependent.This cause communication rate it is not high, reliability is very low, has kept within bounds the application of carrier technology significantly.In recent years, respectively
Company starts to research and develop and produces broadband power line carrier communication product as a trial.These communication products are generally using based on OFDM modulatedemodulates
The communication technology of tune mode.On the one hand the advantages of wideband OFDM technology is that traffic rate greatly improves, on the other hand, when communication is set
It is standby to detect that channel has attenuation on some carriers（Bandwidth usually shared by them is less than communication bandwidth）When, transmitting end can subtract
The transmission rate of few information on these carrier waves（Using the modulation system of low order, such as other carrier wave 16QAM, this carrier wave
Use QPSK）, information even is not transmitted on these carrier waves, to achieve the purpose that improve communication reliability.
Fig. 1 is the ofdm communication system physical frame schematic diagram of the embodiment of the present disclosure, as shown in Figure 1, communicating in bandwidth carrier
In agreement, the message of each physical frame includes leading part and data portion, and leading part is made of multiple leading symbols, preceding
The effect for leading part is to aid in receiving terminal progress automatic growth control, Timing Synchronization（Frame detects and Timing Synchronization）, channel estimation
（It is detected including frequency deviation, initial phase reference is provided to coherent demodulation or differential ference spiral and sends out each carrier channel Quality Feedback
End is transmitted bit load to start）.
Due to the importance of leading part, when leading part is subjected to serious attenuation or interference, the frame of receiving terminal can be caused
Detection failure or timing error are too big, so as to solve adjusting data.There is no fine to this for the existing wideband OFDM communication technology
Solution, limit the application range of the wideband OFDM communication technology.Once the Products having are using originator attenuation precompensation
Method attempt to solve the problems, such as this.This method changes originator spectral shape, product may be caused not meet professional standard,
And this method is helpless for the interference signal to happen suddenly in channel, does not have solution for this problem prior art.
Invention content
In broadband power line communication, signal is different from the attenuation undergone to receiving end of originator on each subcarrier,
There are certain time-varying characteristics.Fig. 2 represents transmission power of the originating terminal signal on each subcarrier, they are typically the same.Fig. 3
Represent the signal power on each subcarrier received in receiving terminal.When the docking collection of letters number carries out relevant operation, in order to
Maximum detection performance is obtained, the embodiment of the present invention detects the attenuation of channel, then to the frequency domain of local original leading waveform
Signal is using the corresponding frequency domain window function filtering of attenuation matched filter.So that it is used for related to the leading waveform progress received
The leading waveform in local of operation is consistent with the waveform received.The detection of fading channel is complete before the reception of this communication frame
Into.It can be obtained by carrying out spectrum analysis to the communication frame being previously received.
Usually there is the interference signal that other power equipments generate in broadband power line communication, on power line channel, these
Interference intensity on different subcarriers differs, it may have certain time-varying characteristics.Fig. 4 represent receiving terminal receive each
Jamming power on a subcarrier.In the embodiment of the present invention, in order to obtain maximum detection performance, there is no communication frame biography in channel
When defeated, interference characteristic is detected, is more than those subcarriers of pre-determined threshold to interference strength thereon, in detection communication frame
It is removed when leading.The mode of removal is using the corresponding frequency domain window function filter of notch filter to the frequency-region signal of interference
Wave.Figure five is the notch filter schematic diagram generated according to interference characteristic on channel.
The embodiment of the present invention provides a kind of targeting signal detection method, including：Obtain to the original leading symbol of anti-pleat into
The first frequency-region signal after row Fourier transformation；The progress of the first time-domain signal in communication channel Fourier transformation is obtained to obtain
The second frequency-region signal arrived；Signal attenuation frequency domain character and interference frequency domain character in acquisition of communication channels；It will be declined according to described
After subtracting frequency domain characteristic, the interference frequency domain characteristic, first frequency-region signal, second frequency-region signal progress calculation process
As a result the second time-domain signal is obtained after carrying out inverse Fourier transform.
Further, the interference frequency domain characteristic is interference width of first time-domain signal on each OFDM subcarriers
Degree.
Further, the attenuation frequency domain characteristic is attenuation width of first time-domain signal on each OFDM subcarriers
Degree.
It further, will be according to the attenuation frequency domain characteristic, the interference frequency domain characteristic, first frequency-region signal, institute
The second frequency-region signal is stated obtain the second time-domain signal after the result after calculation process carries out inverse Fourier transform and be：By described in
The corresponding first frequency domain window function of the corresponding attenuation matched filter of frequency domain characteristic of decaying is to limit the interference frequency domain characteristic
The second frequency domain window function, first frequency-region signal, second frequency-region signal corresponding to notch filter are carried out at multiplication
The result of reason obtains the second time-domain signal after carrying out inverse Fourier transform.
It further, will be according to the attenuation frequency domain characteristic, the interference frequency domain characteristic, first frequency-region signal, institute
The second frequency-region signal is stated obtain the second time-domain signal after the result after calculation process carries out inverse Fourier transform and be：It will be limited
Make the second frequency domain window function corresponding to the notch filter of the interference frequency domain characteristic, first frequency-region signal, described the
Two frequency-region signals obtain time-domain signal after carrying out the result progress inverse Fourier transform of multiplication processing.
It further, will be according to the attenuation frequency domain characteristic, the interference frequency domain characteristic, first frequency-region signal, institute
The second frequency-region signal is stated obtain time-domain signal after the result after calculation process carries out inverse Fourier transform and be：By the attenuation
The corresponding first frequency domain window function of the corresponding attenuation matched filter of frequency domain characteristic, first frequency-region signal, second frequency
Domain signal obtains the second time-domain signal after carrying out the result progress inverse Fourier transform of multiplication processing.
Further, the method is further included carries out peak according to the second time-domain signal obtained after the inverse Fourier transform
Value detection.
The embodiment of the present invention also provides a kind of front symbol detection apparatus, including processor and memory, the processor
It is connected with the memory, for the memory for storing processor executable command, the processor is described for handling
Processor executable command, so that described device can perform following action：It obtains and the original leading symbol of anti-pleat is carried out
The first frequency-region signal after Fourier transformation；The progress of the first time-domain signal in communication channel Fourier transformation is obtained to obtain
The second frequency-region signal；Signal attenuation frequency domain character and interference frequency domain character in acquisition of communication channels；It will be according to the attenuation
Result after frequency domain characteristic, the interference frequency domain characteristic, the first frequency-region signal, the second frequency-region signal progress calculation process carries out inverse
The second time-domain signal is obtained after Fourier transformation.Peak value inspection is carried out according to the time-domain signal obtained after the inverse Fourier transform
It surveys.
The way of current common relevant detection be using original or ideal targeting signal to the signal that receives into
Row relevant operation.The present disclosure proposes a kind of attenuation and interference according to channel, modify to the signal for carrying out related operation
Method, effectively raise signal detection success rate.
Description of the drawings
Fig. 1 is the ofdm communication system physical frame schematic diagram of the embodiment of the present disclosure；
Fig. 2 is the schematic diagram that originator sends signal transmission power on each subcarrier；
Fig. 3 is the power schematic diagram of signal that receiving end receives on each subcarrier；
Fig. 4 is noise and jamming power schematic diagram on each subcarrier that receiving end is detected when not having communication frame on channel；
Fig. 5 is the corresponding frequency domain window function of interference removal notch filter generated according to interference characteristic on channel；
Fig. 6 is a kind of targeting signal detection method flow chart of the embodiment of the present disclosure；
Fig. 7 is a kind of targeting signal detection method principle schematic one of the embodiment of the present invention；
Fig. 8 is a kind of targeting signal detection method principle schematic two of the embodiment of the present invention；
Fig. 9 is a kind of targeting signal detection method principle schematic three of the embodiment of the present invention；
Figure 10 is a kind of front symbol detection apparatus building-block of logic of the embodiment of the present disclosure；
Figure 11 is the original pilot power spectrum of the emulation of the embodiment of the present disclosure；
Figure 12 is the power spectrum after the original pilot power spectrum attenuation of the emulation of the embodiment of the present disclosure；
Figure 13 is the power spectrum after the original pilot power spectrum attenuation of the emulation of the embodiment of the present disclosure.
Specific embodiment
The present invention provides a kind of targeting signal detection method, and Fig. 6 is a kind of targeting signal detection side of the embodiment of the present disclosure
Method flow chart, as shown in fig. 6, including：
S601：Obtain the first frequency-region signal after Fourier transformation is carried out to the original leading symbol of anti-pleat；
S602：It obtains the first time-domain signal in the communication channel and carries out the second frequency-region signal that Fourier transformation obtains；
S603：Signal attenuation frequency domain character and interference frequency domain character in acquisition of communication channels；
S604：It will be according to the attenuation frequency domain characteristic, the interference frequency domain characteristic, first frequency-region signal, second frequency
Result after the signal progress calculation process of domain obtains the second time-domain signal after carrying out inverse Fourier transform.
It should be noted that the original leading symbol of embodiment of the disclosure is being frequency-region signal by Fourier transformation
Afterwards, it due to the physical electrical characteristic of existing processing apparatus, needs to carry out at operation after carrying out anti-pleat processing to frequency-region signal
Reason is the common knowledge of those skilled in the art.The corresponding attenuation matching of the attenuation frequency domain characteristic is filtered in disclosure preferred embodiment
The corresponding first frequency domain window function of wave device is the corresponding second frequency domain window letter of notch filter for limiting the interference frequency domain characteristic
Number, the first frequency-region signal and the second frequency-region signal obtain time domain letter after carrying out the result progress inverse Fourier transform of multiplication processing
Number.
Fig. 7 is a kind of targeting signal detection method principle schematic one of the embodiment of the present invention, as shown in fig. 7, by basis
The attenuation frequency domain characteristic, the interference frequency domain characteristic, the first frequency-region signal, the second frequency-region signal carry out calculation process after result into
Time-domain signal is obtained after row inverse Fourier transform, can be shown as the corresponding attenuation matching filter of the described attenuation frequency domain characteristic
The corresponding first frequency domain window function of wave device is the corresponding second frequency domain window letter of notch filter for limiting the interference frequency domain characteristic
Number, the first frequency-region signal and the second frequency-region signal obtain time domain letter after carrying out the result progress inverse Fourier transform of multiplication processing
Number.Peak detection is carried out according to the time-domain signal obtained after the inverse Fourier transform.
Fig. 8 is a kind of targeting signal detection method principle schematic two of the embodiment of the present invention, as shown in figure 8, by basis
The attenuation frequency domain characteristic, the interference frequency domain characteristic, the first frequency-region signal, the second frequency-region signal carry out calculation process after result into
Time-domain signal is obtained after row inverse Fourier transform, can show as limiting the notch filter corresponding of the interference frequency domain characteristic
Two frequency domain window functions, the first frequency-region signal and the second frequency-region signal obtain after carrying out the result progress inverse Fourier transform of multiplication processing
To time-domain signal.Peak detection is carried out according to the time-domain signal obtained after the inverse Fourier transform.
Fig. 9 is a kind of targeting signal detection method principle schematic three of the embodiment of the present invention, as shown in figure 9, by basis
The attenuation frequency domain characteristic, the interference frequency domain characteristic, the first frequency-region signal, the second frequency-region signal carry out calculation process after result into
Time-domain signal is obtained after row inverse Fourier transform, can be shown as the corresponding attenuation matched filtering of the described attenuation frequency domain characteristic
The result that the corresponding first frequency domain window function of device, the first frequency-region signal and the second frequency-region signal carry out multiplication processing is carried out in inverse Fu
Time-domain signal is obtained after leaf transformation.Peak detection is carried out according to the time-domain signal obtained after the inverse Fourier transform.
On the other hand the embodiment of the present invention also provides a kind of front symbol detection apparatus, Figure 10 is the one of the embodiment of the present disclosure
Symbol detection apparatus building-block of logic in front of kind, as shown in Figure 10, including processor and memory, the processor and the memory
It is connected, for storing processor executable command, which is used to handle the processor executable command memory, with
The device is allowd to perform following action：Obtain the first frequency-region signal after Fourier transformation is carried out to original targeting signal；
It obtains the time-domain signal in the communication channel and carries out the second frequency-region signal that Fourier transformation obtains；Letter in acquisition of communication channels
Number attenuation amplitude value and interference vector value；It will be according to the attenuation frequency domain characteristic, the interference frequency domain characteristic, the first frequency-region signal,
Two frequency-region signals obtain time-domain signal after carrying out the result progress inverse Fourier transform of operation.After the inverse Fourier transform
Obtained time-domain signal carries out peak detection.
Preliminary simulation results：
The leading parameter of the embodiment of the present invention meets 11612 standard of national standard, and FFT length 1024 uses carrier wave 80 ~ 490, sampling speed
Rate 25MHZ.
Figure 11 is the original pilot power spectrum of the embodiment of the present disclosure：
Simulation scenarios 1：
Figure 12 is the power spectrum after the original pilot power spectrum attenuation of the embodiment of the present disclosure：
As a result：
Simulation scenarios 2：
Figure 13 is the power spectrum after the original pilot power spectrum attenuation of the embodiment of the present disclosure：
As a result：
The present invention proposes a kind of method for effectively improving wideband OFDM system detection of preamble.The result table of primary Calculation machine emulation
Bright, different according to the attenuation of channel, the present invention can improve more than detection performance 1dB.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way above-described embodiment, all to be obtained by the way of equivalent substitution or equivalent transformation
Technical solution is all fallen in protection scope of the present invention.
Claims (9)
1. a kind of targeting signal detection method, which is characterized in that including：
Obtain the first frequency-region signal after Fourier transformation is carried out to the original leading symbol of anti-pleat；
It obtains the first time-domain signal in the communication channel and carries out the second frequency-region signal that Fourier transformation obtains；
Signal attenuation frequency domain character and interference frequency domain character in acquisition of communication channels；
It will be according to the attenuation frequency domain characteristic, the interference frequency domain characteristic, first frequency-region signal, second frequency-region signal
It carries out obtaining the second time-domain signal after the result after calculation process carries out inverse Fourier transform.
2. according to the above-mentioned method of claim 1, which is characterized in that the interference frequency domain characteristic exists for first time-domain signal
Interference magnitude on each OFDM subcarriers.
3. according to the above-mentioned method of claim 1, which is characterized in that the attenuation frequency domain characteristic exists for first time-domain signal
Attenuation amplitude on each OFDM subcarriers.
It 4. according to the method described in claim 1, it is characterized in that, will be according to the attenuation frequency domain characteristic, the interference frequency domain
After result after characteristic, first frequency-region signal, second frequency-region signal progress calculation process carries out inverse Fourier transform
Obtaining the second time-domain signal is：
By the corresponding first frequency domain window function of the corresponding attenuation matched filter of the attenuation frequency domain characteristic, to limit the interference
The second frequency domain window function, first frequency-region signal, second frequency-region signal corresponding to the notch filter of frequency domain characteristic
The second time-domain signal is obtained after carrying out the result progress inverse Fourier transform of multiplication processing.
It 5. according to the method described in claim 1, it is characterized in that, will be according to the attenuation frequency domain characteristic, the interference frequency domain
After result after characteristic, first frequency-region signal, second frequency-region signal progress calculation process carries out inverse Fourier transform
Obtaining the second time-domain signal is：
It will be to limit the second frequency domain window function, first frequency domain letter corresponding to the notch filter of the interference frequency domain characteristic
Number, second frequency-region signal carry out multiplication processing result carry out inverse Fourier transform after obtain time-domain signal.
It 6. according to the method described in claim 1, it is characterized in that, will be according to the attenuation frequency domain characteristic, the interference frequency domain
After result after characteristic, first frequency-region signal, second frequency-region signal progress calculation process carries out inverse Fourier transform
Obtaining time-domain signal is：
By the corresponding first frequency domain window function of the corresponding attenuation matched filter of the attenuation frequency domain characteristic, first frequency domain letter
Number, second frequency-region signal carry out multiplication processing result carry out inverse Fourier transform after obtain the second time-domain signal.
7. according to the method described in claim 1, it is characterized in that the method is further included according to after the inverse Fourier transform
The second obtained time-domain signal carries out peak detection.
8. a kind of front symbol detection apparatus, including processor and memory, the processor is connected with the memory, institute
Memory is stated for storing processor executable command, the processor is used to handle the processor executable command, so that
Following action can be performed by obtaining described device：
Obtain the first frequency-region signal after Fourier transformation is carried out to the original leading symbol of anti-pleat；
It obtains the first time-domain signal in the communication channel and carries out the second frequency-region signal that Fourier transformation obtains；
Signal attenuation frequency domain character and interference frequency domain character in acquisition of communication channels；
To operation be carried out according to the attenuation frequency domain characteristic, the interference frequency domain characteristic, the first frequency-region signal, the second frequency-region signal
Result that treated obtains the second time-domain signal after carrying out inverse Fourier transform.
9. peak detection is carried out according to the time-domain signal obtained after the inverse Fourier transform.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710692764 | 2017-08-14 | ||
| CN2017106927645 | 2017-08-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108243140A true CN108243140A (en) | 2018-07-03 |
Family
ID=62699548
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810053365.9A Pending CN108243140A (en) | 2017-08-14 | 2018-01-19 | A kind of targeting signal detection method and device |
| CN201810115021.6A Pending CN108365870A (en) | 2017-08-14 | 2018-02-05 | The method and apparatus of frame synchronization in a kind of broadband power line communication |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810115021.6A Pending CN108365870A (en) | 2017-08-14 | 2018-02-05 | The method and apparatus of frame synchronization in a kind of broadband power line communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN108243140A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838882A (en) * | 2018-08-16 | 2020-02-25 | 大唐移动通信设备有限公司 | Method and device for detecting preamble signal |
| CN115085749A (en) * | 2022-08-22 | 2022-09-20 | 中国人民解放军国防科技大学 | Transmission distortion processing method of communication signal and related assembly |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112565116B (en) * | 2019-09-26 | 2021-10-22 | 华为技术有限公司 | Signal processing method, communication chip and communication device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101433043A (en) * | 2006-02-08 | 2009-05-13 | 高通股份有限公司 | Spectral shaping to reduce peak-to-average ratio in wireless communication |
| CN101640550A (en) * | 2009-08-27 | 2010-02-03 | 上海华为技术有限公司 | Method and device for detecting precursor |
| US20120051472A1 (en) * | 2010-08-30 | 2012-03-01 | Oki Semiconductor Co., Ltd. | Correlator and demodulation device including correlator |
| CN103532901A (en) * | 2013-10-14 | 2014-01-22 | 国家电网公司 | Timing synchronization method and system for power line carrier communication |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101295999B (en) * | 2008-06-27 | 2014-02-19 | 中兴通讯股份有限公司 | Detection method for accidental precursor access |
| CN106342412B (en) * | 2010-03-31 | 2013-12-04 | 浙江大学 | A kind of frequency domain synchronizing signal of ofdm system sends and detection method |
| WO2016015782A1 (en) * | 2014-08-01 | 2016-02-04 | Huawei Technologies Duesseldorf Gmbh | Sub-band allocation signaling in a non-contiguous multi-carrier communication system |
| CN105515753B (en) * | 2015-11-30 | 2019-05-17 | 成都九洲电子信息系统股份有限公司 | A kind of RFID lead code detecting method based on FPGA |
| CN106571854A (en) * | 2016-11-05 | 2017-04-19 | 北京晓程科技股份有限公司 | Power carrier OFDM (orthogonal frequency division multiplexing) system frequency domain frame detection synchronization method and device |
-
2018
- 2018-01-19 CN CN201810053365.9A patent/CN108243140A/en active Pending
- 2018-02-05 CN CN201810115021.6A patent/CN108365870A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101433043A (en) * | 2006-02-08 | 2009-05-13 | 高通股份有限公司 | Spectral shaping to reduce peak-to-average ratio in wireless communication |
| CN101640550A (en) * | 2009-08-27 | 2010-02-03 | 上海华为技术有限公司 | Method and device for detecting precursor |
| US20120051472A1 (en) * | 2010-08-30 | 2012-03-01 | Oki Semiconductor Co., Ltd. | Correlator and demodulation device including correlator |
| CN103532901A (en) * | 2013-10-14 | 2014-01-22 | 国家电网公司 | Timing synchronization method and system for power line carrier communication |
Non-Patent Citations (1)
| Title |
|---|
| 王杰强: ""基于ofdm电力线载波通信系统设计及fpga实现"", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110838882A (en) * | 2018-08-16 | 2020-02-25 | 大唐移动通信设备有限公司 | Method and device for detecting preamble signal |
| CN110838882B (en) * | 2018-08-16 | 2021-02-02 | 大唐移动通信设备有限公司 | Method and device for detecting preamble signal |
| CN115085749A (en) * | 2022-08-22 | 2022-09-20 | 中国人民解放军国防科技大学 | Transmission distortion processing method of communication signal and related assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108365870A (en) | 2018-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lélé et al. | Channel estimation methods for preamble‐based OFDM/OQAM modulations | |
| Mengi et al. | Successive impulsive noise suppression in OFDM | |
| CN107005513B (en) | A kind of the slicing processing method and equipment of signal | |
| CN106506431B (en) | The method that joint peak-to-average force ratio inhibits the ofdm system pulse interference suppression extinguished with pulse | |
| KR20050011258A (en) | Circuit for impulsive noise suppression in orthogonal frequency division multiple receiving system and method thereof | |
| CN108243140A (en) | A kind of targeting signal detection method and device | |
| Bazzi et al. | Power efficient scattered pilot channel estimation for FBMC/OQAM | |
| CN107592135B (en) | A kind of adaptive impulse noise suppression method of power line communication | |
| US5005189A (en) | Detection of digital signals received from multipath channels | |
| EP1819116B1 (en) | Channel estimator and method for channel estimation | |
| CN113556306A (en) | Discrete Fourier transform extended orthogonal time-frequency-space modulation method | |
| US20190288901A1 (en) | Ofdm reception under high adjacent channel interference while preserving frame structure | |
| CN106534000B (en) | Time domain channel estimation method and device | |
| CN107317784B (en) | Multi-band parallel filtering mixed carrier transmission method | |
| Trivedi et al. | Fractional Fourier domain equalization for DCT based OFDM system with CFO | |
| CN101364846B (en) | Sub-carrier noise power estimation method based on pilot | |
| KR102182390B1 (en) | Device for vdes invoked sc-fde waveform of multipath fading | |
| CN107171989A (en) | Channel estimation methods based on DFT in visible light communication system | |
| Taufiqurrahman et al. | Performance analysis of circular 8-qam constellation with mmse equalizer for ofdm system using usrp | |
| CN110912849B (en) | Multi-carrier method and system based on cyclic prefix | |
| EP3238398B1 (en) | Inter-block interference suppression using a null guard interval | |
| Kageyama et al. | An enhanced selected mapping technique for joint PAPR reduction and impulsive noise suppression in multi-carrier powerline communications systems | |
| Khedkar et al. | Estimation and reduction of CFO in OFDM system | |
| CN105049396A (en) | PTS-OFDM method based on clipping noise and sub-carrier interference elimination | |
| Seagraves et al. | Robust mobile WiMAX preamble detection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180703 |
|
| WD01 | Invention patent application deemed withdrawn after publication |