CN111591248A - Vehicle door control communication system and method - Google Patents
Vehicle door control communication system and method Download PDFInfo
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- CN111591248A CN111591248A CN202010300834.XA CN202010300834A CN111591248A CN 111591248 A CN111591248 A CN 111591248A CN 202010300834 A CN202010300834 A CN 202010300834A CN 111591248 A CN111591248 A CN 111591248A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/20—Means to switch the anti-theft system on or off
- B60R25/24—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user
- B60R25/245—Means to switch the anti-theft system on or off using electronic identifiers containing a code not memorised by the user where the antenna reception area plays a role
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/30—Detection related to theft or to other events relevant to anti-theft systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
- B60R25/30—Detection related to theft or to other events relevant to anti-theft systems
- B60R25/307—Detection related to theft or to other events relevant to anti-theft systems using data concerning maintenance or configuration
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Abstract
The invention belongs to the field of vehicle control, and particularly relates to a vehicle door control communication system level method, which comprises the following steps: an in-vehicle device that transmits and receives signals via a plurality of antennas provided at different positions of a vehicle; a portable device that receives a signal transmitted from one or more of the plurality of antennas and transmits a signal corresponding to the received signal; the vehicle-mounted machine establishes a signal judgment matrix of the plurality of antennas, performs matrix characteristic matching on the signals received from the portable machine based on the signal judgment matrix, and judges the position of the portable machine according to a matrix characteristic matching result; the method for judging the inside and the outside of the vehicle room is used in a mode not based on the distance, so that the communication efficiency of the portable machine and the vehicle and the accuracy of judgment in the vehicle room are improved; meanwhile, when a plurality of vehicle-mounted antennas of the vehicle fail, the accuracy of the determination inside and outside the vehicle can be unaffected.
Description
Technical Field
The invention belongs to the field of vehicle control, and particularly relates to a vehicle door control communication system and a vehicle door control communication method.
Background
A communication system for a vehicle that locks and unlocks a door without using a mechanical key has been put to practical use. Specifically, a keyless entry system that locks or unlocks a door by remote operation from a portable device held by a user, an intelligent entry (registered trademark) system that unlocks a door only by the user holding the portable device approaching the vehicle or touching a door handle, and the like have been put into practical use.
In addition, a vehicle communication system capable of starting an engine or a drive battery system of a vehicle without using a mechanical key (ignition key) has also been put to practical use. Specifically, a system called a push start system or the like is put into practical use, in which a user holding a portable device pushes a start button to start an engine or a drive battery system. In the push start system, an in-vehicle device constituting a vehicle communication system executes an in-vehicle-compartment/outside determination process for determining whether or not a regular portable device corresponding to a vehicle is present in a vehicle compartment, and starts an engine or a drive battery system only when it is determined that the regular portable device is present in the vehicle compartment, thereby improving convenience and safety.
The in-vehicle interior/exterior determination process uses a position estimation technique based on transmission/reception of a wireless signal between the in-vehicle device and the portable device. The position estimation techniques based on transmission and reception of radio signals are roughly classified into a method based on distance (range-base) and a method not based on distance (range-free). The distance-based approach is the following: in the in-vehicle/outdoor determination process, the in-vehicle device or the portable device measures specific information Of the wireless signal transmitted and Received between the plurality Of in-vehicle antennas provided at different positions Of the vehicle and the portable device, for example, the Received Signal Strength (RSSI) Of the wireless signal, the Arrival Time (TOA), the Arrival Time Difference (TDOA), the Arrival Angle (AOA), and the like, and estimates the position Of the portable device based on the difference Of the measurement results.
Patent document 1 discloses a keyless entry device that transmits signals from antennas provided inside and outside a vehicle, and determines whether the position of a portable device is inside or outside the vehicle based on whether the portable device responds to a signal from any of the antennas. That is, the determination of the inside and outside of the vehicle interior disclosed in patent document 1 is based on a distance-independent method in which the determination is made only by the presence or absence of a response from the portable device corresponding to a signal transmitted from the vehicle-mounted device.
Patent document 2 discloses an invention relating to a keyless entry device for determining whether a portable device is inside or outside a vehicle interior or inside or outside an interface such as inside and outside a predetermined distance from a vehicle door. Patent document 2 discloses a method of determining inside and outside of an interface by a distance-based method in which the strength of a received signal of a signal transmitted from an in-vehicle antenna is measured on the portable device side to determine the inside and outside. In particular, patent document 2 discloses the following: even in a configuration in which an in-vehicle antenna is mounted on a movable body such as a mirror, a seat, or a handle on a vehicle surface, the determination of the inside and outside of a boundary surface can be performed with high accuracy. Specifically, the following are disclosed: the degree of similarity of data sets and parameters associated with different radio wave intensities inside and outside a boundary surface obtained in advance and identification symbols of an on-vehicle antenna is obtained by calculating the Mahalanobis distance, and the data sets and parameters to be compared at the time of similarity are switched according to the state before and after the movement of the movable body.
Patent document 3 discloses an invention relating to a keyless door opening device related to the invention disclosed in patent document 2. Patent document 3 discloses, in particular, the following: in order to maintain the accuracy of the position determination of the portable device as much as possible even when the vehicle-mounted antenna has failed, when the mahalanobis distance is calculated and the similarity between the radio wave intensities obtained in advance and the measured radio wave intensities is obtained, the radio wave intensity from the failed vehicle-mounted antenna is calculated as zero.
In the determination of the inside and outside of the vehicle interior of the portable device of the distance-independent system disclosed in patent document 1, it is difficult to perform the determination with high accuracy. In patent document 2, a highly accurate determination based on the distance based method based on the received signal strength is possible, but a change in the received signal strength when a failure occurs in some of the in-vehicle antennas is not considered.
According to the invention disclosed in patent document 3, when a failure occurs in the in-vehicle antenna, the determination accuracy can be maintained so as to avoid the use of the in-vehicle antenna that has failed. However, since the positions of the plurality of antennas provided in the vehicle are appropriately designed in the front, rear, left, and right directions on the assumption of all the antennas being used, there is a possibility that the determination accuracy may be degraded if the received signal strengths of the signals from all the remaining antennas other than the antenna in which the failure has occurred are used.
Disclosure of Invention
The invention mainly aims to provide a vehicle door control communication system and a vehicle door control communication method, which are used for judging whether the interior or the exterior of a vehicle is determined in a mode not based on distance, so that the communication efficiency between a portable machine and the vehicle and the accuracy of judgment in the vehicle are improved; meanwhile, when a plurality of vehicle-mounted antennas of the vehicle fail, the accuracy of the determination inside and outside the vehicle can be unaffected.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a vehicle door control communication system comprising: an in-vehicle device that transmits and receives signals via a plurality of antennas provided at different positions of a vehicle; a portable device that receives a signal transmitted from one or more of the plurality of antennas and transmits a signal corresponding to the received signal; the vehicle-mounted machine establishes a signal judgment matrix of the plurality of antennas, performs matrix characteristic matching on the signals received from the portable machine based on the signal judgment matrix, and judges the position of the portable machine according to a matrix characteristic matching result; meanwhile, after receiving the signal from the portable machine, the vehicle-mounted machine excites any one of the plurality of antennas to transmit the signal, uses other antennas arranged at different positions of the vehicle to receive the signal, establishes a fault judgment matrix according to the result of receiving the signal, judges the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle, and updates the position of the portable machine by combining the matrix characteristic matching result to obtain the final position of the portable machine.
Further, the establishment rule of the signal judgment matrix is as follows: according to a set sequence, establishing matrixes corresponding to a plurality of antennas, wherein each antenna corresponds to one value in the matrixes; and according to the strength of the transmission signal of each antenna, giving each antenna different values, wherein the values are the values in the matrix corresponding to the antenna.
Further, the establishment rule of the fault judgment matrix is as follows: judging the signal strength of the received signal result according to the signal receiving result, and if the signal strength is higher than a set threshold value, giving the signal strength to the value of the corresponding antenna in the matrix; if the signal strength is lower than the set threshold, the value of the antenna in the matrix is set to 1.
Further, the method for the vehicle-mounted device to establish a signal determination matrix of the plurality of antennas, perform matrix feature matching on the signal received from the portable device based on the signal determination matrix, and determine the position of the portable device according to a matrix feature matching result performs the following steps: acquiring intermediate frequency signals of an antenna matrix; converting an intermediate frequency signal input by the antenna array into a baseband signal, and outputting an in-phase component and an orthogonal component of the baseband signal; monitoring and compensating for channel inconsistency, specifically: respectively collecting data of M sampling points after digital down-conversion for N channels in the antenna array, and solving the instantaneous amplitude and the instantaneous phase of each sampling point, wherein the calculation formula is as follows:
k is 1 … M, N is 1 … N; wherein A isn(k) Is the instantaneous amplitude, θ, of the kth sample point of the nth channeln(k) Is the instantaneous phase, x, of the kth sample point of the η th channelnq(k) And xm(k) Respectively outputting quadrature component and in-phase component corresponding to k-th sampling point of η th channel, N is number of anti-interference antenna elements in antenna array, averaging instantaneous amplitude and instantaneous phase of M sampling points to obtain average instantaneous amplitude of N channels
And average instantaneous phase
The calculation formula is as follows:
n is 1 … N; wherein M is the number of sampling points; dividing the average instantaneous amplitudes of the other N-I channels except the first channel by the average instantaneous amplitude of the first channel, subtracting the average instantaneous phase, and solving the amplitude inconsistency and the phase inconsistency of the other N-I channels except the first channel relative to the first channel; setting other N-I channels except the first channel corresponding to the first channelThe amplitude and phase inconsistencies of the traces are respectively:
the compensation is to perform complex multiplication on the output of each channel digital down-conversion module and a complex number formed by amplitude inconsistency and phase inconsistency, and the complex number multiplication formula is as follows:
Further, the method for determining the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle by the fault determination matrix comprises the following steps: acquiring a statistical value obtained by measuring received signal strength of signals transmitted from some of the plurality of antennas in advance; and exciting any one of the plurality of antennas to transmit signals, receiving the signals by using other antennas arranged at different positions of the vehicle, and establishing a fault judgment matrix according to the result of the received signals.
A vehicle door control communication method, the method performing the steps of: step S1: the vehicle-mounted machine is used for establishing a signal judgment matrix of the plurality of antennas, carrying out matrix characteristic matching on the signals received from the portable machine based on the signal judgment matrix and judging the position of the portable machine according to a matrix characteristic matching result; step S2: after receiving the signal from the portable machine, the vehicle-mounted machine excites any one of the plurality of antennas to send the signal, uses other antennas arranged at different positions of the vehicle to receive the signal, and establishes a fault judgment matrix according to the result of receiving the signal; step S3: and judging the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle, and updating the position of the portable machine by combining the matrix characteristic matching result to obtain the final position of the portable machine.
Further, the establishment rule of the signal judgment matrix is as follows: according to a set sequence, establishing matrixes corresponding to a plurality of antennas, wherein each antenna corresponds to one value in the matrixes; and according to the strength of the transmission signal of each antenna, giving each antenna different values, wherein the values are the values in the matrix corresponding to the antenna.
Further, the establishment rule of the fault judgment matrix is as follows: judging the signal strength of the received signal result according to the signal receiving result, and if the signal strength is higher than a set threshold value, giving the signal strength to the value of the corresponding antenna in the matrix; if the signal strength is lower than the set threshold, the value of the antenna in the matrix is set to 1.
Further, the method for the vehicle-mounted device to establish a signal determination matrix of the plurality of antennas, perform matrix feature matching on the signal received from the portable device based on the signal determination matrix, and determine the position of the portable device according to a matrix feature matching result performs the following steps: acquiring intermediate frequency signals of an antenna matrix; converting an intermediate frequency signal input by the antenna array into a baseband signal, and outputting an in-phase component and an orthogonal component of the baseband signal; monitoring and compensating for channel inconsistency, specifically: respectively collecting data of M sampling points after digital down-conversion for N channels in the antenna array, and solving the instantaneous amplitude and the instantaneous phase of each sampling point, wherein the calculation formula is as follows:
k is 1 … M, N is 1 … N; wherein A isn(k) Is the instantaneous amplitude, θ, of the kth sample point of the nth channeln(k) Is the instantaneous phase, x, of the kth sample point of the η th channelnq(k) And xm(k) Respectively outputting quadrature component and in-phase component corresponding to k-th sampling point of η th channel, N is number of anti-interference antenna elements in antenna array, averaging instantaneous amplitude and instantaneous phase of M sampling points to obtain average instantaneous amplitude of N channels
And average instantaneous phase
The calculation formula is as follows:
n is 1 … N; wherein M is the number of sampling points; dividing the average instantaneous amplitudes of the other N-I channels except the first channel by the average instantaneous amplitude of the first channel, subtracting the average instantaneous phase, and solving the amplitude inconsistency and the phase inconsistency of the other N-I channels except the first channel relative to the first channel; let the amplitude disparity and phase disparity of the N-I channels other than the first channel with respect to the first channel be:
the compensation is to perform complex multiplication on the output of each channel digital down-conversion module and a complex number formed by amplitude inconsistency and phase inconsistency, and the complex number multiplication formula is as follows:
Further, the method for determining the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle by the fault determination matrix comprises the following steps: acquiring a statistical value obtained by measuring received signal strength of signals transmitted from some of the plurality of antennas in advance; and exciting any one of the plurality of antennas to transmit signals, receiving the signals by using other antennas arranged at different positions of the vehicle, and establishing a fault judgment matrix according to the result of the received signals.
The vehicle door control communication system and the vehicle door control communication method have the following beneficial effects: the invention uses a mode not based on distance to judge the inside and the outside of the vehicle, thus improving the communication efficiency of the portable machine and the vehicle and the judgment precision of the inside of the vehicle; meanwhile, when a plurality of vehicle-mounted antennas of the vehicle fail, the accuracy of the determination inside and outside the vehicle can be unaffected.
Drawings
FIG. 1 is a schematic system diagram of a vehicle door control communication system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a vehicle-mounted device of the vehicle door control communication system and method according to the embodiment of the invention;
FIG. 3 is a schematic method flow diagram of a vehicle door control communication method provided by an embodiment of the invention;
FIG. 4 is a schematic diagram of an experimental effect of the vehicle door control communication system and method according to the embodiment of the present invention, which is based on misjudgment of the number of times of experiments, and a schematic diagram of a comparative experiment in the prior art;
fig. 5 is a schematic diagram of an experimental curve of the vehicle door control communication system and method according to the embodiment of the present invention, which varies with the operation efficiency according to the number of experiments, and a schematic diagram of a comparative experiment in the prior art.
1-vehicle body, 2-portable machine, 3-vehicle machine, 41, 42, 43 and 44-antenna, 5-excited antenna, 31-control section, 32-vehicle receiving section, 33-vehicle transmitting section, 34-storage section, 35-request switch, 36-fault detecting section, 37-switch, 30-storage medium in which corresponding computer program is recorded, a-experimental curve of the present invention, B-experimental curve of the prior art.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:
example 1
As shown in fig. 1, the vehicle door control communication system includes: an in-vehicle device that transmits and receives signals via a plurality of antennas provided at different positions of a vehicle; a portable device that receives a signal transmitted from one or more of the plurality of antennas and transmits a signal corresponding to the received signal; the vehicle-mounted machine establishes a signal judgment matrix of the plurality of antennas, performs matrix characteristic matching on the signals received from the portable machine based on the signal judgment matrix, and judges the position of the portable machine according to a matrix characteristic matching result; meanwhile, after receiving the signal from the portable machine, the vehicle-mounted machine excites any one of the plurality of antennas to transmit the signal, uses other antennas arranged at different positions of the vehicle to receive the signal, establishes a fault judgment matrix according to the result of receiving the signal, judges the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle, and updates the position of the portable machine by combining the matrix characteristic matching result to obtain the final position of the portable machine.
Specifically, the vehicle-mounted device includes a storage unit that stores statistical values obtained by measuring in advance received signal strengths of signals transmitted from some of the plurality of antennas, in association with information identifying the antenna of the transmission source for each of the inside and outside of the vehicle compartment at the measurement location; a failure detection unit that detects a failed antenna among the plurality of antennas; a selection unit that selects an antenna to be used from the remaining antennas except for the faulty antenna detected by the fault detection unit; a reading unit that reads the statistical value corresponding to the selected antenna from the storage unit; and a determination unit that determines which of the inside and outside of the vehicle the portable device is present in by calculating and comparing statistical distances between the statistical values read by the reading unit and the received signal strengths measured by the portable device of the signals transmitted from the antenna selected by the selection unit for each of the inside and outside of the vehicle.
At the same time, the storage unit stores, for each of a plurality of different areas that collectively include the vehicle interior space, statistics of the inside and outside obtained by measuring the received signal strength of the signals transmitted from the plurality of antennas inside and outside the plurality of areas for each of different antenna groups,
the reading unit reads, for each of the plurality of areas, statistics of a group corresponding to the antenna selected by the selecting unit from among the statistics of different groups stored in the storage unit,
the determination unit includes an area determination unit that determines, for each of the plurality of areas, which of the inside and outside of the area the portable device is present in by calculating and comparing a statistical distance between the statistical value read by the reading unit and the received signal strength measured by the portable device of the signal transmitted from the antenna selected by the selection unit for each of the inside and outside of the area,
when the area determination unit determines that the portable device is located inside the entire area, the determination unit determines that the portable device is present in the vehicle interior of the vehicle.
Example 2
On the basis of the previous embodiment, the establishment rule of the signal judgment matrix is as follows: according to a set sequence, establishing matrixes corresponding to a plurality of antennas, wherein each antenna corresponds to one value in the matrixes; and according to the strength of the transmission signal of each antenna, giving each antenna different values, wherein the values are the values in the matrix corresponding to the antenna.
On the basis of the above embodiment, the establishment rule of the failure determination matrix is as follows: judging the signal strength of the received signal result according to the signal receiving result, and if the signal strength is higher than a set threshold value, giving the signal strength to the value of the corresponding antenna in the matrix; if the signal strength is lower than the set threshold, the value of the antenna in the matrix is set to 1.
On the basis of the above embodiment, the method for the in-vehicle device to establish the signal determination matrix of the plurality of antennas, perform matrix feature matching on the signal received from the portable device based on the signal determination matrix, and determine the position of the portable device according to the matrix feature matching result performs the following steps: acquiring intermediate frequency signals of an antenna matrix; converting an intermediate frequency signal input by the antenna array into a baseband signal, and outputting an in-phase component and an orthogonal component of the baseband signal; monitoring and compensating for channel inconsistency, specifically: respectively collecting data of M sampling points after digital down-conversion for N channels in the antenna array, and solving the instantaneous amplitude and the instantaneous phase of each sampling point, wherein the calculation formula is as follows:
k is 1 … M, N is 1 … N; wherein A isn(k) Is the instantaneous amplitude, θ, of the kth sample point of the nth channeln(k) Is the instantaneous phase, x, of the kth sample point of the η th channelnq(k) And xm(k) Respectively outputting quadrature component and in-phase component corresponding to k-th sampling point of η th channel, N is number of anti-interference antenna elements in antenna array, averaging instantaneous amplitude and instantaneous phase of M sampling points to obtain average instantaneous amplitude of N channels
And average instantaneous phase
The calculation formula is as follows:
n is 1 … N; wherein M is the number of sampling points; dividing the average instantaneous amplitudes of the other N-I channels except the first channel by the average instantaneous amplitude of the first channel, subtracting the average instantaneous phase, and solving the amplitude inconsistency and the phase inconsistency of the other N-I channels except the first channel relative to the first channel; let the amplitude disparity and phase disparity of the N-I channels other than the first channel with respect to the first channel be:
the compensation is to perform complex multiplication on the output of each channel digital down-conversion module and a complex number formed by amplitude inconsistency and phase inconsistency, and the complex number multiplication formula is as follows:
and acquiring a compensated result according to the calculated result, and performing matrix feature matching on the compensated result and a signal judgment evidence to obtain a final feature matching result.
Specifically, the portable device includes a storage unit for storing statistical values obtained by measuring the received signal strengths of signals transmitted from the plurality of antennas inside and outside the vehicle interior in advance, in association with information identifying the antenna of the transmission source for each of the inside and outside of the vehicle interior at the measurement location;
a notification reception unit configured to receive a notification of a use antenna among the plurality of antennas;
a reading unit that reads, from the storage unit, statistical values of the received signal strength of the signal transmitted using the antenna, the statistical values being determined from the notification received by the notification reception unit;
a measurement unit that measures the received signal strength of the signal transmitted from the antenna; and
and a determination unit that determines which of the inside and outside of the vehicle the portable device is present in by calculating and comparing the statistical distance between the statistical value read by the reading unit and the received signal strength measured by the measurement unit for each of the inside and outside of the vehicle.
On the basis of the above embodiment, the method for determining the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle by the fault determination matrix performs the following steps: acquiring a statistical value obtained by measuring received signal strength of signals transmitted from some of the plurality of antennas in advance; and exciting any one of the plurality of antennas to transmit signals, receiving the signals by using other antennas arranged at different positions of the vehicle, and establishing a fault judgment matrix according to the result of the received signals.
A vehicle door control communication method, the method performing the steps of: step S1: the vehicle-mounted machine is used for establishing a signal judgment matrix of the plurality of antennas, carrying out matrix characteristic matching on the signals received from the portable machine based on the signal judgment matrix and judging the position of the portable machine according to a matrix characteristic matching result; step S2: after receiving the signal from the portable machine, the vehicle-mounted machine excites any one of the plurality of antennas to send the signal, uses other antennas arranged at different positions of the vehicle to receive the signal, and establishes a fault judgment matrix according to the result of receiving the signal; step S3: and judging the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle, and updating the position of the portable machine by combining the matrix characteristic matching result to obtain the final position of the portable machine.
On the basis of the previous embodiment, the establishment rule of the signal judgment matrix is as follows: according to a set sequence, establishing matrixes corresponding to a plurality of antennas, wherein each antenna corresponds to one value in the matrixes; and according to the strength of the transmission signal of each antenna, giving each antenna different values, wherein the values are the values in the matrix corresponding to the antenna.
On the basis of the above embodiment, the establishment rule of the failure determination matrix is as follows: judging the signal strength of the received signal result according to the signal receiving result, and if the signal strength is higher than a set threshold value, giving the signal strength to the value of the corresponding antenna in the matrix; if the signal strength is lower than the set threshold, the value of the antenna in the matrix is set to 1.
On the basis of the above embodiment, the method for the in-vehicle device to establish the signal determination matrix of the plurality of antennas, perform matrix feature matching on the signal received from the portable device based on the signal determination matrix, and determine the position of the portable device according to the matrix feature matching result performs the following steps: acquiring intermediate frequency signals of an antenna matrix; converting an intermediate frequency signal input by the antenna array into a baseband signal, and outputting an in-phase component and an orthogonal component of the baseband signal; monitoring and compensating for channel inconsistency, specifically: respectively collecting data of M sampling points after digital down-conversion for N channels in the antenna array, and solving the instantaneous amplitude and the instantaneous phase of each sampling point, wherein the calculation formula is as follows:
k is 1 … M, N is 1 … N; wherein A isn(k) Is the instantaneous amplitude, θ, of the kth sample point of the nth channeln(k) Is the instantaneous phase, x, of the kth sample point of the η th channelnq(k) And xm(k) Are respectively a numberThe method comprises the steps of outputting quadrature components and in-phase components corresponding to k-th sampling points of η channels by a word down-conversion module, averaging the instantaneous amplitudes and the instantaneous phases of M sampling points to obtain the average instantaneous amplitudes of N channels
And average instantaneous phase
The calculation formula is as follows:
n is 1 … N; wherein M is the number of sampling points; dividing the average instantaneous amplitudes of the other N-I channels except the first channel by the average instantaneous amplitude of the first channel, subtracting the average instantaneous phase, and solving the amplitude inconsistency and the phase inconsistency of the other N-I channels except the first channel relative to the first channel; let the amplitude disparity and phase disparity of the N-I channels other than the first channel with respect to the first channel be:
the compensation is to perform complex multiplication on the output of each channel digital down-conversion module and a complex number formed by amplitude inconsistency and phase inconsistency, and the complex number multiplication formula is as follows:
and acquiring a compensated result according to the calculated result, and performing matrix feature matching on the compensated result and a signal judgment evidence to obtain a final feature matching result.
On the basis of the above embodiment, the method for determining the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle by the fault determination matrix performs the following steps: acquiring a statistical value obtained by measuring received signal strength of signals transmitted from some of the plurality of antennas in advance; and exciting any one of the plurality of antennas to transmit signals, receiving the signals by using other antennas arranged at different positions of the vehicle, and establishing a fault judgment matrix according to the result of the received signals.
The above description is only an embodiment of the present invention, but not intended to limit the scope of the present invention, and any structural changes made according to the present invention should be considered as being limited within the scope of the present invention without departing from the spirit of the present invention.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process and related description of the system described above may refer to the corresponding process in the foregoing method embodiments, and will not be described herein again.
It should be noted that, the system provided in the foregoing embodiment is only illustrated by dividing the functional modules, and in practical applications, the functions may be distributed by different functional modules according to needs, that is, the modules or steps in the embodiment of the present invention are further decomposed or combined, for example, the modules in the foregoing embodiment may be combined into one module, or may be further split into multiple sub-modules, so as to complete all or part of the functions described above. The names of the modules and steps involved in the embodiments of the present invention are only for distinguishing the modules or steps, and are not to be construed as unduly limiting the present invention.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes and related descriptions of the storage device and the processing device described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Those of skill in the art would appreciate that the various illustrative modules, method steps, and modules described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that programs corresponding to the software modules, method steps may be located in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. To clearly illustrate this interchangeability of electronic hardware and software, various illustrative components and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as electronic hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing or implying a particular order or sequence.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.
Claims (10)
1. A vehicle door control communication system comprising: an in-vehicle device that transmits and receives signals via a plurality of antennas provided at different positions of a vehicle; a portable device that receives a signal transmitted from one or more of the plurality of antennas and transmits a signal corresponding to the received signal; the vehicle-mounted machine establishes a signal judgment matrix of the plurality of antennas, performs matrix characteristic matching on a signal received from the portable machine based on the signal judgment matrix, and judges the position of the portable machine according to a matrix characteristic matching result; meanwhile, after receiving the signal from the portable machine, the vehicle-mounted machine excites any one of the plurality of antennas to transmit the signal, uses other antennas arranged at different positions of the vehicle to receive the signal, establishes a fault judgment matrix according to the result of receiving the signal, judges the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle, and updates the position of the portable machine by combining the matrix characteristic matching result to obtain the final position of the portable machine.
2. The system of claim 1, wherein the signal decision matrix is established as follows: according to a set sequence, establishing matrixes corresponding to a plurality of antennas, wherein each antenna corresponds to one value in the matrixes; and according to the strength of the transmission signal of each antenna, giving each antenna different values, wherein the values are the values in the matrix corresponding to the antenna.
3. The system of claim 2, wherein the fault determination matrix is established as follows: judging the signal strength of the received signal result according to the signal receiving result, and if the signal strength is higher than a set threshold value, giving the signal strength to the value of the corresponding antenna in the matrix; if the signal strength is lower than the set threshold, the value of the antenna in the matrix is set to 1.
4. The system according to claim 3, wherein the in-vehicle device establishes a signal determination matrix for the plurality of antennas, performs matrix feature matching on the signal received from the portable device based on the signal determination matrix, and determines the position of the portable device based on the result of the matrix feature matching by performing the steps of: acquiring intermediate frequency signals of an antenna matrix; converting an intermediate frequency signal input by the antenna array into a baseband signal, and outputting an in-phase component and an orthogonal component of the baseband signal; monitoring and compensating for channel inconsistency, specifically: for N channels in antenna arrayRespectively collecting data of M sampling points after digital down-conversion, and solving the instantaneous amplitude and the instantaneous phase of each sampling point, wherein the calculation formula is as follows:
wherein A isn(k) Is the instantaneous amplitude, θ, of the kth sample point of the nth channeln(k) Is the instantaneous phase, x, of the kth sample point of the η th channelnq(k) And xm(k) Respectively outputting quadrature component and in-phase component corresponding to k-th sampling point of η th channel, N is number of anti-interference antenna elements in antenna array, averaging instantaneous amplitude and instantaneous phase of M sampling points to obtain average instantaneous amplitude of N channels
And average instantaneous phase
The calculation formula is as follows:
wherein M is the number of sampling points; dividing the average instantaneous amplitudes of the other N-I channels except the first channel by the average instantaneous amplitude of the first channel, subtracting the average instantaneous phase, and solving the amplitude inconsistency and the phase inconsistency of the other N-I channels except the first channel relative to the first channel; let the amplitude disparity and phase disparity of the N-I channels other than the first channel with respect to the first channel be:
the compensation is to perform complex multiplication on the output of each channel digital down-conversion module and a complex number formed by amplitude inconsistency and phase inconsistency, and the complex number multiplication formula is as follows:
and acquiring a compensated result according to the calculated result, and performing matrix feature matching on the compensated result and a signal judgment evidence to obtain a final feature matching result.
5. The system of claim 4, wherein the failure determination matrix determines a location of a failed antenna among a plurality of antennas disposed at different locations of the vehicle by performing the steps of: acquiring a statistical value obtained by measuring received signal strength of signals transmitted from some of the plurality of antennas in advance; and exciting any one of the plurality of antennas to transmit signals, receiving the signals by using other antennas arranged at different positions of the vehicle, and establishing a fault judgment matrix according to the result of the received signals.
6. A vehicle door control communication method based on the system of any one of claims 1 to 5, characterized in that the method performs the steps of: step S1: the vehicle-mounted machine is used for establishing a signal judgment matrix of the plurality of antennas, carrying out matrix characteristic matching on the signals received from the portable machine based on the signal judgment matrix and judging the position of the portable machine according to a matrix characteristic matching result; step S2: after receiving the signal from the portable machine, the vehicle-mounted machine excites any one of the plurality of antennas to send the signal, uses other antennas arranged at different positions of the vehicle to receive the signal, and establishes a fault judgment matrix according to the result of receiving the signal; step S3: and judging the position of the antenna with the fault in the plurality of antennas arranged at different positions of the vehicle, and updating the position of the portable machine by combining the matrix characteristic matching result to obtain the final position of the portable machine.
7. The method of claim 6, wherein the signal decision matrix is established as follows: according to a set sequence, establishing matrixes corresponding to a plurality of antennas, wherein each antenna corresponds to one value in the matrixes; and according to the strength of the transmission signal of each antenna, giving each antenna different values, wherein the values are the values in the matrix corresponding to the antenna.
8. The method of claim 7, wherein the fault determination matrix is established as follows: judging the signal strength of the received signal result according to the signal receiving result, and if the signal strength is higher than a set threshold value, giving the signal strength to the value of the corresponding antenna in the matrix; if the signal strength is lower than the set threshold, the value of the antenna in the matrix is set to 1.
9. The method according to claim 8, wherein the in-vehicle device establishes a signal determination matrix for the plurality of antennas, performs matrix feature matching on the signal received from the portable device based on the signal determination matrix, and determines the position of the portable device based on a result of the matrix feature matching by performing the steps of: acquiring intermediate frequency signals of an antenna matrix; converting an intermediate frequency signal input by the antenna array into a baseband signal, and outputting an in-phase component and an orthogonal component of the baseband signal; monitoring and compensating for channel inconsistency, specifically: respectively collecting data of M sampling points after digital down-conversion for N channels in the antenna array, and solving the instantaneous amplitude and the instantaneous phase of each sampling point, wherein the calculation formula is as follows:
wherein A isn(k) Is the instantaneous amplitude, θ, of the kth sample point of the nth channeln(k) Is the instantaneous phase, x, of the kth sample point of the η th channelnq(k) And xm(k) Respectively outputting quadrature component and in-phase component corresponding to k-th sampling point of η th channel, N is number of anti-interference antenna elements in antenna array, averaging instantaneous amplitude and instantaneous phase of M sampling points to obtain average of N channelsInstantaneous amplitude
And average instantaneous phase
The calculation formula is as follows:
wherein M is the number of sampling points; dividing the average instantaneous amplitudes of the other N-I channels except the first channel by the average instantaneous amplitude of the first channel, subtracting the average instantaneous phase, and solving the amplitude inconsistency and the phase inconsistency of the other N-I channels except the first channel relative to the first channel; let the amplitude disparity and phase disparity of the N-I channels other than the first channel with respect to the first channel be:
the compensation is to perform complex multiplication on the output of each channel digital down-conversion module and a complex number formed by amplitude inconsistency and phase inconsistency, and the complex number multiplication formula is as follows:
and acquiring a compensated result according to the calculated result, and performing matrix feature matching on the compensated result and a signal judgment evidence to obtain a final feature matching result.
10. The method of claim 9, wherein the failure determination matrix determines a location of a failed antenna among a plurality of antennas disposed at different locations of a vehicle by performing the steps of: acquiring a statistical value obtained by measuring received signal strength of signals transmitted from some of the plurality of antennas in advance; and exciting any one of the plurality of antennas to transmit signals, receiving the signals by using other antennas arranged at different positions of the vehicle, and establishing a fault judgment matrix according to the result of the received signals.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007095891A1 (en) * | 2006-02-20 | 2007-08-30 | Conti Temic Microelectronic Gmbh | Radio-based locking system |
| JP2007288257A (en) * | 2006-04-12 | 2007-11-01 | Fujitsu Ten Ltd | Reception system |
| US20100222012A1 (en) * | 2009-03-02 | 2010-09-02 | Fujitsu Limited | Wireless communication apparatus and method |
| CN102130726A (en) * | 2010-01-15 | 2011-07-20 | 西门子公司 | Fault diagnosis method in vehicle-mounted wireless communication system and device thereof |
| CN105137454A (en) * | 2015-07-22 | 2015-12-09 | 北京航空航天大学 | Anti-interference algorithm FPGA realization method based on covariance matrix characteristic decomposition and realization device thereof |
| CN106536840A (en) * | 2014-06-26 | 2017-03-22 | 株式会社自动网络技术研究所 | Vehicle communication system, in-vehicle device, portable device, and computer program |
| CN107749783A (en) * | 2017-08-25 | 2018-03-02 | 深圳市盛路物联通讯技术有限公司 | A kind of method and system of car antenna Autonomous test failure |
| CN108965560A (en) * | 2018-07-16 | 2018-12-07 | 厦门美图移动科技有限公司 | Antenna state detection method and terminal equipment |
| KR20190091761A (en) * | 2018-01-29 | 2019-08-07 | 주식회사 만도 | apparatus and method for detecting antenna failure |
-
2020
- 2020-04-16 CN CN202010300834.XA patent/CN111591248A/en not_active Withdrawn
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007095891A1 (en) * | 2006-02-20 | 2007-08-30 | Conti Temic Microelectronic Gmbh | Radio-based locking system |
| JP2007288257A (en) * | 2006-04-12 | 2007-11-01 | Fujitsu Ten Ltd | Reception system |
| US20100222012A1 (en) * | 2009-03-02 | 2010-09-02 | Fujitsu Limited | Wireless communication apparatus and method |
| CN102130726A (en) * | 2010-01-15 | 2011-07-20 | 西门子公司 | Fault diagnosis method in vehicle-mounted wireless communication system and device thereof |
| CN106536840A (en) * | 2014-06-26 | 2017-03-22 | 株式会社自动网络技术研究所 | Vehicle communication system, in-vehicle device, portable device, and computer program |
| CN105137454A (en) * | 2015-07-22 | 2015-12-09 | 北京航空航天大学 | Anti-interference algorithm FPGA realization method based on covariance matrix characteristic decomposition and realization device thereof |
| CN107749783A (en) * | 2017-08-25 | 2018-03-02 | 深圳市盛路物联通讯技术有限公司 | A kind of method and system of car antenna Autonomous test failure |
| KR20190091761A (en) * | 2018-01-29 | 2019-08-07 | 주식회사 만도 | apparatus and method for detecting antenna failure |
| CN108965560A (en) * | 2018-07-16 | 2018-12-07 | 厦门美图移动科技有限公司 | Antenna state detection method and terminal equipment |
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