CN112003645A - Synchronous reference signal extraction method and device - Google Patents
Synchronous reference signal extraction method and device Download PDFInfo
- Publication number
- CN112003645A CN112003645A CN202011179350.0A CN202011179350A CN112003645A CN 112003645 A CN112003645 A CN 112003645A CN 202011179350 A CN202011179350 A CN 202011179350A CN 112003645 A CN112003645 A CN 112003645A
- Authority
- CN
- China
- Prior art keywords
- synthesis
- branch data
- signal
- processing
- branch
- 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.)
- Granted
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 34
- 238000000605 extraction Methods 0.000 title claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 127
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 127
- 238000012545 processing Methods 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims description 9
- 230000003044 adaptive effect Effects 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 3
- 230000006854 communication Effects 0.000 abstract description 19
- 238000004891 communication Methods 0.000 abstract description 18
- 238000001514 detection method Methods 0.000 description 21
- 230000001427 coherent effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/19—Earth-synchronous stations
-
- 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
-
- 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
- H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- Aviation & Aerospace Engineering (AREA)
- General Physics & Mathematics (AREA)
- Radio Transmission System (AREA)
Abstract
A method and a device for extracting a synchronous reference signal are provided, the method comprises the following steps: generating a local synchronization signal; performing branch processing on the local synchronous signal by using a self-adaptive synthesis module to obtain a plurality of branch data, and performing synthesis processing on each branch data, wherein the synthesis processing is to perform product calculation on the current branch data and a synthesis coefficient corresponding to each branch data respectively and then sum the current branch data and the synthesis coefficient; determining a value of a synthesis coefficient when a mean square error of the branch data and the received signal after the synthesis processing is minimum; and processing the received signal according to the value of the synthesis coefficient to generate a synchronous reference signal corresponding to the received signal. The embodiment utilizes the known synchronous signals and the received signals of the synchronous segments to adaptively calculate the synthesis coefficient, and can adaptively extract high-quality reference signals from weak communication irradiation and scattering signals with complex structures and various signal parameters.
Description
Technical Field
The present invention relates to the field of information transmission technologies, and in particular, to a method and an apparatus for extracting a synchronization reference signal.
Background
In various military and civil distributed wireless information systems such as an air-space-ground integrated heterogeneous network, a tactical information network, an internet of things, a broadband wireless communication network, a satellite communication network, an observation and monitoring information network, a vehicle networking network and the like, in the working process of the system, wireless communication is a radio frequency sensor which needs to work, and the system can send out data communication signals. In the whole distributed wireless information system layer, data communication signals are transmitted more, the transmitting time of the signals is randomly occupied by each node, and all the nodes are traversed randomly according to a certain statistical period length. In the airspace, because the transmitter of the distributed wireless information system can randomly traverse all the nodes, in the process, the irradiation signal and the scattering signal of data communication can irradiate the target from different angles in all directions. During the irradiation, the target scatters and modulates the signal, and the modulated information carries important target-related information.
As shown in fig. 4, during the communication between the ground station a and the drone D, the direct illumination signal from the ground station a may be overlaid on the airplanes B, C and D, while the illumination signal from the ground station a may be scattered by the airplanes B and C, and the scattered signal may be illuminated on the airplane D, during which the airplane D may detect the object in the air and measure its parameters using the illumination signal and the scattered signal from the ground station a during the communication.
In order to detect the target in the air and measure the parameters thereof, as shown in the above figure, firstly, a reference signal needs to be extracted, and a series of processing (including time-frequency two-dimensional processing, clutter suppression and the like) is adopted to highlight the signal parameter change of the received signal compared with the reference signal; further adopting measures such as constant false alarm detection and the like to detect the change; then, the variation of the parameter is measured; and finally, combining the state of the system on the basis of measuring the target parameters to finish the track tracking of the target.
In the above processing process, the key step is to extract the reference signal, and in the conventional reference signal extraction, synchronization, demodulation, decoding and verification are required to be performed on the target received signal, and after the verification is successful, the operations of encoding, modulating, framing and the like are performed on the acquired message in reverse direction, so that the reference signal is restored. The traditional treatment method has the following weaknesses: firstly, accurately restoring a message transmitted by a transmitting terminal; secondly, the restored reference signal is completely a reference signal locally reproduced by the airplane D, and cannot represent modulation information of a propagation environment, so that target modulation information and propagation environment modulation information are blurred, and the target parameter measurement performance is deteriorated; and thirdly, in the nodes of non-communication objects, the reference signals cannot be restored, so that target detection and parameter measurement cannot be carried out.
Disclosure of Invention
In view of the above, it is necessary to provide a method and an apparatus for extracting a synchronization reference signal to solve the problem in the prior art that the reference signal cannot be accurately extracted in the communication process.
A synchronization reference signal extraction method, comprising:
generating a local synchronizing signal according to a pre-stored generator polynomial and parameters, or circularly reading out a pre-stored random signal according to a sequence to generate a local synchronizing signal;
performing branch processing on the local synchronous signal by using a self-adaptive synthesis module to obtain a plurality of branch data, and performing synthesis processing on each branch data, wherein the synthesis processing is to perform product calculation on the current branch data and a synthesis coefficient corresponding to each branch data respectively and then sum the current branch data and the synthesis coefficient;
determining a value of a synthesis coefficient when a mean square error of the branch data and the received signal after the synthesis processing is minimum;
processing the received signal according to the value of the synthesis coefficient to generate a synchronous reference signal corresponding to the received signal;
the adaptive synthesis module comprises a plurality of branch modules, each branch module comprises a delay unit and a synthesis unit which are connected in series, the delay unit is used for carrying out delay processing on the local synchronous signal to generate a plurality of branch data, the synthesis unit comprises a multiplier and a synthesis coefficient memory, the multiplier is used for carrying out synthesis processing on each branch data, and the synthesis coefficient memory is used for storing synthesis coefficients.
Further, in the above method for extracting a synchronization reference signal, the step of determining a value of a synthesis coefficient at which a mean square error between the branch data and the received signal after the synthesis processing is minimum includes:
the step of determining a value of a synthesis coefficient at which a mean square error between the branch data after the synthesis processing and the received signal is minimum includes:
establishing a minimum mean square error equation of the branch data and the received signal after the synthesis processing:
wherein,
，
is shown as
The bit of the branch data is taken out,
，
which indicates the length of the synchronization signal,
is shown as
The synthesis coefficients of the individual branches, M representing the total number of branches,
indicating received signals
The number of bits is,
2, expressing 2 norm operation;
and determining the value of the synthesis coefficient when the mean square error is minimum according to the error equation.
Further, in the above method for extracting a synchronization reference signal, a calculation formula of the synthesis coefficient is:
wherein,
，
，
，
representing a circular downshifting of a column vector
The number of bits is,
representing the conjugate transpose of a matrix or vector,
。
further, in the above method for extracting synchronization reference signal, the synchronization reference signalrefThe calculation formula of (2) is as follows:
wherein,
，
，
，
which represents a non-negative integer that is,
to
Denotes the synthesis coefficient of the first individual branch, M denotes the total number of branches,
representing the received signal.
The embodiment of the present invention further provides a device for extracting a synchronization reference signal, including:
the synchronous signal module is used for generating a local synchronous signal according to a pre-stored generator polynomial and parameters or circularly reading out a pre-stored random signal according to a sequence to generate a local synchronous signal;
the self-adaptive synthesis module is used for performing branch processing on the local synchronous signal to obtain a plurality of branch data and performing synthesis processing on each branch data, wherein the synthesis processing is to perform product calculation on the current branch data and a synthesis coefficient corresponding to each branch data and then sum the current branch data and the synthesis coefficient;
the synthesis coefficient resolving module is used for determining the value of the synthesis coefficient when the mean square error of the branch data and the received signal after the synthesis processing is minimum;
a reference signal generating module, configured to process the received signal according to the value of the synthesis coefficient to generate a synchronous reference signal corresponding to the received signal;
the adaptive synthesis module comprises a plurality of branch modules, each branch module comprises a delay unit and a synthesis unit which are connected in series, the delay unit is used for carrying out delay processing on the local synchronous signal to generate a plurality of branch data, the synthesis unit comprises a multiplier and a synthesis coefficient memory, the multiplier is used for carrying out synthesis processing on each branch data, and the synthesis coefficient memory is used for storing synthesis coefficients.
The method utilizes the known synchronous signals and the received signals of the synchronous section to calculate the synthesis coefficient in a self-adaptive manner, can extract high-quality reference signals from weak communication irradiation and scattering signals with complex structures and various signal parameters in a self-adaptive manner, provides the high-quality reference signals for coherent passive detection, coherent active detection and coherent external source detection, improves the detection capability and target parameter measurement capability of low signal-to-noise ratio signals, improves the detection efficiency of targets, and can realize airborne, shipborne, spaceborne and foundation concealed target detection, monitoring and early warning. Meanwhile, the hidden situation perception capability of the wireless information system is obviously improved, the defects of the capabilities of airborne, shipborne, spaceborne, foundation active detection, passive detection and external source detection are overcome, and the method has wide military and civil application prospects.
Drawings
Fig. 1 is a flowchart of a synchronization reference signal extraction method according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating the adaptive synthesis module performing branch processing on the local synchronization signal according to the first embodiment of the present invention;
FIG. 3 is a block diagram of a synchronization reference signal extraction apparatus according to a first embodiment of the present invention;
fig. 4 is a process example of a conventional communication.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited correspondingly. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Referring to fig. 1, a method for extracting a synchronization reference signal according to a first embodiment of the present invention includes steps S11-S14.
In step S11, a local synchronization signal is generated.
In a communication system, a typical one-frame communication transmission signal contains a synchronization segment, a control segment, a payload segment, and a protection segment. At the transmitting end, the synchronizing signal is known to all devices in the whole network and is used for synchronizing information such as sampling time, carrier waves and the like of each receiving device, the control section and the payload section are generated by controlling random messages to be transmitted and transmitting parameters of the transmitting end, and the two sections of signals are random for the receiving end.
The local synchronization signal is generated in the coarse synchronization segment according to a pre-stored generator polynomial and a pre-stored parameter, for example: g =1+ X2+X3+X6+X8+X9+X10The register initial value is 0, and a synchronization signal is generated. Or a synchronization signal may also be generated by cyclically reading out a pre-stored random signal in order. The synchronization signal is: x is the number of0，x1，…，xn-1。
Step S12, using an adaptive synthesis module to perform branch processing on the local synchronization signal to obtain multiple branch data, and performing synthesis processing on each branch data, where the synthesis processing is to perform product calculation on current branch data and a synthesis coefficient corresponding to each branch data, and then sum the current branch data and the synthesis coefficient.
Step S13 is to determine a value of a combining coefficient at which a mean square error between the branch data and the received signal after the combining process is minimum.
Specifically, the adaptive synthesis module comprises a plurality of branch modules, each branch module comprises a delay unit and a synthesis unit which are connected in series, the delay unit is used for performing delay processing on local synchronization to generate a plurality of branch data, each synthesis unit comprises a multiplier and a synthesis coefficient memory, the multiplier is used for performing synthesis processing on each branch data, the synthesis coefficient memory is used for storing synthesis coefficients, and each synthesis coefficient memory stores one synthesis coefficient.
Wherein the number of branching modulesMThe maximum time ambiguity range and the sampling interval time of the system are determined, specifically,
，
representing the maximum time-ambiguity range of the system,
which represents the time interval of sampling of the system,
indicating a ceiling operation. The
The delay amounts of the delay units of the parallel branch modules are respectively
. As shown in FIG. 2, each register is initialized with zeros, and each bit data of each sync signal is input to
The parallel branch modules obtain M branch data after data delay post-processing, and the M branch data of each synchronous signal are respectively corresponding to each synthesis coefficientMultiply and sum to obtain
：
Wherein,
represents the second of the synchronization signal
The number of the branches is one,
，
which indicates the length of the synchronization signal,
is shown as
The synthesis coefficient of each branch, M represents the total number of branches.
The synthesis coefficient of the above formula (1)
Is an unknown number, the specific value of which is according to
And the mean square error of the received signal. Specifically, the synthesis coefficient satisfying the minimum mean square error is calculated so that the above
Mean square error of result of multiplying subsynchronous signal data bit and synthesis coefficient and buffer
And minimum. The minimum mean square error equation of the branch data and the received signal after the synthesis processing is as follows:
wherein,
indicating received signals
The number of bits is,
representing a 2-norm operation.
Further, the value of one of the synthesis coefficients satisfying the above equation may be calculated according to the following calculation formula:
wherein,
，
，
，
representing a circular downshifting of a column vector
The number of bits is,
representing the conjugate transpose of a matrix or vector,
。
step S14, processing the received signal according to the value of the synthesis coefficient to generate a synchronization reference signal corresponding to the received signal.
According to the synthesis coefficient
And obtaining a reference signal ref corresponding to the received signal, wherein the calculation formula is as follows:
wherein,
，
，
，
which represents a non-negative integer that is,
to
Denotes the synthesis coefficient of the first individual branch, M denotes the total number of branches,
representing the received signal.
In the frame structure of the communication signal, only the signal of the synchronization segment is known, the embodiment utilizes the known synchronization signal and the actual received signal of the synchronization segment to adaptively calculate the synthesis coefficient, and can adaptively extract the high-quality reference signal from the weak, complex-structure and diverse-signal-parameter communication irradiation and scattering signals, and all segments contained in the corresponding communication signal, such as the synchronization segment and the payload segment, provide the high-quality reference signal for coherent passive detection, coherent active detection and coherent external source detection, so that the detection system is favorable for utilizing the communication signals of all segments to accumulate energy, improve the detection capability of the low signal-to-noise ratio signal and the target parameter measurement capability, improve the detection efficiency of the target, and can realize airborne, naval, satellite-borne and foundation-concealed target detection, monitoring and early warning. Meanwhile, the hidden situation perception capability of the wireless information system is obviously improved, the defects of the capabilities of airborne, shipborne, spaceborne, foundation active detection, passive detection and external source detection are overcome, and the method has wide military and civil application prospects.
Referring to fig. 3, a synchronization reference signal extracting apparatus according to a second embodiment of the present invention includes:
a synchronizing signal module 10, configured to generate a local synchronizing signal according to a pre-stored generator polynomial and a parameter, or cyclically read out a pre-stored random signal in sequence to generate a local synchronizing signal;
the adaptive synthesis module 20 is configured to perform branch processing on the local synchronization signal to obtain a plurality of branch data, and perform synthesis processing on each branch data, where the synthesis processing is to perform product calculation on current branch data and a synthesis coefficient corresponding to each branch data, and then sum the current branch data and the synthesis coefficient;
a synthesis coefficient calculation module 30, configured to determine a value of a synthesis coefficient when a mean square error between the branch data and the received signal after the synthesis processing is minimum;
and the reference signal generating module 40 is configured to process the received signal according to the value of the synthesis coefficient to generate a synchronous reference signal corresponding to the received signal.
The synchronous reference signal extraction device comprises a synchronous signal module, a self-adaptive synthesis module, a synthesis coefficient resolving module and a reference signal generation module, wherein the synchronous signal module generates a local synchronous signal of a receiving node; the self-adaptive synthesis module is used for self-adaptively synthesizing the multi-path received signals; the synthesis coefficient resolving module resolves the synthesis coefficient based on the principle of minimum mean square error; the reference signal generation module generates a reference signal using the synthesis coefficients satisfying the minimum mean square error.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (5)
1. A method for extracting a synchronization reference signal, comprising:
generating a local synchronizing signal according to a pre-stored generator polynomial and parameters, or circularly reading out a pre-stored random signal according to a sequence to generate a local synchronizing signal;
performing branch processing on the local synchronous signal by using a self-adaptive synthesis module to obtain a plurality of branch data, and performing synthesis processing on each branch data, wherein the synthesis processing is to perform product calculation on the current branch data and a synthesis coefficient corresponding to each branch data respectively and then sum the current branch data and the synthesis coefficient;
determining a value of a synthesis coefficient when a mean square error of the branch data and the received signal after the synthesis processing is minimum;
processing the received signal according to the value of the synthesis coefficient to generate a synchronous reference signal corresponding to the received signal;
the adaptive synthesis module comprises a plurality of branch modules, each branch module comprises a delay unit and a synthesis unit which are connected in series, the delay unit is used for carrying out delay processing on the local synchronous signal to generate a plurality of branch data, the synthesis unit comprises a multiplier and a synthesis coefficient memory, the multiplier is used for carrying out synthesis processing on each branch data, and the synthesis coefficient memory is used for storing synthesis coefficients.
2. The method of claim 1, wherein the step of determining the value of the combining coefficient at which the mean square error of the branch data after the combining process with the received signal is minimum comprises:
establishing a minimum mean square error equation of the branch data and the received signal after the synthesis processing:
wherein,
，
is shown as
The bit of the branch data is taken out,
，
which indicates the length of the synchronization signal,
is shown as
The synthesis coefficients of the individual branches, M representing the total number of branches,
indicating received signals
The number of bits is,
2, expressing 2 norm operation;
and determining the value of the synthesis coefficient when the mean square error is minimum according to the error equation.
3. The method of claim 2, wherein the minimum mean square error equation is calculated by the formula of the synthesis coefficient:
wherein,
，
，
，
representing a circular downshifting of a column vector
The number of bits is,
representing the conjugate transpose of a matrix or vector,
。
4. the method of claim 1, wherein the synchronous reference signal ref is calculated by the formula:
wherein,
，
，
，
which represents a non-negative integer that is,
to
Denotes the synthesis coefficient of the first individual branch, M denotes the total number of branches,
representing the received signal.
5. A synchronization reference signal extraction apparatus, comprising:
the synchronous signal module is used for generating a local synchronous signal according to a pre-stored generator polynomial and parameters or circularly reading out a pre-stored random signal according to a sequence to generate a local synchronous signal;
the self-adaptive synthesis module is used for performing branch processing on the local synchronous signal to obtain a plurality of branch data and performing synthesis processing on each branch data, wherein the synthesis processing is to perform product calculation on the current branch data and a synthesis coefficient corresponding to each branch data and then sum the current branch data and the synthesis coefficient;
the synthesis coefficient resolving module is used for determining the value of the synthesis coefficient when the mean square error of the branch data and the received signal after the synthesis processing is minimum;
a reference signal generating module, configured to process the received signal according to the value of the synthesis coefficient to generate a synchronous reference signal corresponding to the received signal;
the adaptive synthesis module comprises a plurality of branch modules, each branch module comprises a delay unit and a synthesis unit which are connected in series, the delay unit is used for carrying out delay processing on the local synchronous signal to generate a plurality of branch data, the synthesis unit comprises a multiplier and a synthesis coefficient memory, the multiplier is used for carrying out synthesis processing on each branch data, and the synthesis coefficient memory is used for storing synthesis coefficients.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179350.0A CN112003645B (en) | 2020-10-29 | 2020-10-29 | Synchronous reference signal extraction method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011179350.0A CN112003645B (en) | 2020-10-29 | 2020-10-29 | Synchronous reference signal extraction method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112003645A true CN112003645A (en) | 2020-11-27 |
| CN112003645B CN112003645B (en) | 2021-01-29 |
Family
ID=73475775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011179350.0A Active CN112003645B (en) | 2020-10-29 | 2020-10-29 | Synchronous reference signal extraction method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112003645B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1351429A (en) * | 2000-10-31 | 2002-05-29 | 华为技术有限公司 | Method and equipment for up receiving array in wireless communicaltion system |
| US7450924B1 (en) * | 2004-03-25 | 2008-11-11 | At&T Mobility Ii Llc | Interference cancellation and receive diversity for single-valued modulation receivers |
| CN101572574A (en) * | 2009-06-01 | 2009-11-04 | 中国民航大学 | Smart antenna self-adapting interference suppression method based on least square-lowest mean square |
-
2020
- 2020-10-29 CN CN202011179350.0A patent/CN112003645B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1351429A (en) * | 2000-10-31 | 2002-05-29 | 华为技术有限公司 | Method and equipment for up receiving array in wireless communicaltion system |
| US7450924B1 (en) * | 2004-03-25 | 2008-11-11 | At&T Mobility Ii Llc | Interference cancellation and receive diversity for single-valued modulation receivers |
| CN101572574A (en) * | 2009-06-01 | 2009-11-04 | 中国民航大学 | Smart antenna self-adapting interference suppression method based on least square-lowest mean square |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112003645B (en) | 2021-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hamilton et al. | Propagation modeling for radio frequency tomography in wireless networks | |
| JP5535024B2 (en) | Radar equipment | |
| JP6492377B2 (en) | Orthogonal separation device and orthogonal separation method | |
| US5719579A (en) | Virtual noise radar waveform for reduced radar detectability | |
| Rameez et al. | Autoregressive model-based signal reconstruction for automotive radar interference mitigation | |
| US10725151B1 (en) | System and method for detecting pulses using fused signal power/phase modulation detection | |
| KR20090077756A (en) | Methods and systems for signal selection | |
| CN110376559B (en) | Single-channel radar main lobe multi-source interference separation method, device and equipment | |
| US10305701B2 (en) | Phase-modulated signal parameter estimation using streaming calculations | |
| CN106662644B (en) | Method and device for detecting the speed and distance of at least one object relative to a receiver receiving a signal | |
| Brieger et al. | Multimodal learning for reliable interference classification in GNSS signals | |
| Chi et al. | Utilizing orthogonal coprime signals for improving broadband acoustic Doppler current profilers | |
| CN112003645B (en) | Synchronous reference signal extraction method and device | |
| CN116520256B (en) | Airborne early warning radar interference recognition method and device based on deep learning | |
| Colone et al. | Reference-free amplitude-based WiFi passive sensing | |
| CN109597060B (en) | Radar speed measurement method and device | |
| RU2419252C2 (en) | Method to prevent unauthorised access in satellite communication systems and device for its realisation | |
| CN112816940B (en) | Target distance estimation method and device based on sound pressure and particle vibration velocity | |
| Feinberg et al. | Hardware prototype demonstration of a cognitive sub‐Nyquist automotive radar | |
| Chetty et al. | Occupancy Detection and People Counting Using WiFi Passive Radar | |
| Yajnanarayana et al. | Bi-Static Sensing in OFDM Wireless Systems for Indoor Scenarios | |
| Stinco et al. | IEEE 802.22 passive radars: Multistatic detection and velocity profiler | |
| CN112098984B (en) | Target body detection method and device of scattered signals | |
| JP2019120613A (en) | Rader system, method of controlling rader system, and program | |
| CN114895273B (en) | Distributed dry detection integrated system based on time reversal |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |