CN108243476A - Determine the method and WLAN devices of candidate's sight line path - Google Patents

Determine the method and WLAN devices of candidate's sight line path Download PDF

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Publication number
CN108243476A
CN108243476A CN201611219604.0A CN201611219604A CN108243476A CN 108243476 A CN108243476 A CN 108243476A CN 201611219604 A CN201611219604 A CN 201611219604A CN 108243476 A CN108243476 A CN 108243476A
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China
Prior art keywords
signal
training sequence
wireless signal
time point
antenna
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CN201611219604.0A
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Chinese (zh)
Inventor
潘淳
郎松平
刘晟
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to CN201611219604.0A priority Critical patent/CN108243476A/en
Priority to PCT/CN2017/118023 priority patent/WO2018121438A1/en
Priority to EP17888978.8A priority patent/EP3550890B1/en
Priority to EP17889459.8A priority patent/EP3554138A4/en
Priority to JP2019534848A priority patent/JP6752371B2/en
Priority to PCT/CN2017/118018 priority patent/WO2018121437A1/en
Publication of CN108243476A publication Critical patent/CN108243476A/en
Priority to US16/449,880 priority patent/US20190313363A1/en
Priority to US16/452,036 priority patent/US20190320405A1/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Abstract

Disclose a kind of method and WLAN devices of determining candidate sight line path.WLAN devices receive signal in this method, and signal is the wireless signal sent via the terminal to be identified that mulitpath transmits.Wireless signal includes the first training sequence, and signal includes the superposition of multiple first training sequences transmitted via mulitpath.WLAN devices match signal with the second training sequence, to obtain receiving the time point of multiple first training sequences transmitted via mulitpath, second training sequence is the information of WLAN devices storage, and the first training sequence is identical with the value of the second training sequence.WLAN devices determine that the path of the wireless signal received earliest is candidate sight line path.And angle estimation only is carried out to sight line path, so as to reduce calculation amount, positioning time delay is effectively shortened, decreases the occupancy of interface-free resources.

Description

Determine the method and WLAN devices of candidate's sight line path
Technical field
This application involves wireless communication field more particularly to a kind of methods and WLAN of determining candidate sight line path Equipment.
Background technology
WLAN (English：Wireless local area network, WLAN) stationkeeping ability can be provided, with complete Into it is various service (such as：Navigation, advertisement pushing, ambient services are found and personnel's traffic monitoring).
Wlan device can utilize antenna array scheme to estimate the angle of arrival (English that wireless signal reaches receiving terminal： Angle of arrival, AoA), and identification equipment is treated according to AoA and is positioned.As shown in Figure 1, depositing due to reflector In equipment (terminal such as to be identified) to be identified and wlan device (such as access point (English：Access point, AP)) between exist Mulitpath transmits wireless signal.But since the path length in each path is different, the time that wireless signal reaches AP is different, AP The signal received is the effect being superimposed after wireless signal delay on each path.Due to sight (English：Line of sight, LOS) AOA of the wireless signal in path is the correct angle of terminal to be identified, therefore, AP it needs to be determined that terminal to be identified and AP Between LOS path AoA.
Invention content
The method and WLAN devices of a kind of determining candidate sight line path that the application provides, this method reduce meters Complexity is calculated, reduces the occupancy of interface-free resources.
In a first aspect, providing a kind of method of determining candidate sight line path, this method can include：Wlan device receives Signal, the signal include the wireless signal sent via the equipment to be identified that mulitpath transmits.Wherein, wireless signal includes the One training sequence, the signal include the superposition of multiple first training sequences transmitted via mulitpath.In a wlan, the first instruction Practice a kind of long training field (English in the wireless signal that sequence is sent for terminal to be identified：Long training field, LTF).Since, there are propagation delay time, wireless signal when reaching AP on every paths will be overlapped, and being formed should between mulitpath Signal.Wlan device matches the signal with the second training sequence, with obtain receiving transmitted via mulitpath it is multiple The time point of first training sequence, the second training sequence are the information of wlan device storage, the first training sequence and the second training The value of sequence is identical.Wlan device determines the path of the wireless signal received earliest as candidate sight line path, the nothing received earliest Line signal corresponds to first time point in time point.
Before wlan device and equipment to be identified communication, wlan device stores the second training sequence, and equipment to be identified is deposited The first training sequence is stored up, the first training sequence is identical with the value of the second training sequence.Training sequence in wireless signal is only One.If there is LOS path, LOS path is wlan device and the shortest transmission path of equipment room to be identified.Therefore, along LOS The wireless signal of propagated reaches the good autocorrelation that wlan device utilizes training sequence earliest, determines the nothing received earliest The path of line signal is candidate sight line path.The characteristics of due to training sequence, this method have very high resolution ratio in time-domain. Equipment to be identified only needs to send a wireless signal, it is possible to find candidate sight line path by wireless device.
In an optional realization, wlan device matches the signal with the second training sequence, including：WLAN is set It is standby that the signal and the second training sequence are subjected to related operation, to obtain multiple pulse signals.Wlan device believes multiple pulses Number peak value time of occurrence, as the time point for receiving multiple first training sequences.
Wlan device utilizes the good autocorrelation of training sequence, obtains the first LTF in mulitpath and reaches wlan device Distribution situation of the time in time-domain, so that it is determined that the path of the wireless signal received earliest is candidate sight line path.
One it is optional realize, wlan device includes mutiple antennas, each antenna received signal in mutiple antennas Difference, wherein, wlan device matches signal with the second training sequence, with obtain receiving transmitted via mulitpath it is more The time point of a first training sequence includes：Wlan device instructs antenna received signal each in mutiple antennas with second respectively Practice sequence to be matched, to obtain the time point of multiple first training sequences that each antenna reception is transmitted via mulitpath. Wireless device determines that the path of the wireless signal received earliest is that candidate sight line path includes：Wireless device is determined in mutiple antennas The time point for the wireless signal that each antenna respectively receives earliest, and the wireless signal respectively received earliest according to each antenna Time point, determine the wireless signal that receives earliest via path angle of arrival.If the path is LOS path, this is arrived It can be used to determine the position of terminal to be identified up to angle.
In an optional realization, check that the energy of the wireless signal of candidate sight line path transmission exists in wireless device When being more than threshold value via the accounting in the gross energy of the wireless signal of mulitpath transmission, wireless device determines candidate's sight path Diameter is LOS path.
Second aspect provides a kind of WLAN devices, which, which has, realizes that the above method is real The function of WLAN devices behavior in border.The function can also be performed corresponding by hardware realization by hardware Software is realized.The hardware or software include the one or more and corresponding module of above-mentioned function.
The third aspect provides a kind of WLAN devices, which can include：Antenna, processing Device and reservoir,
For antenna for receiving signal, which includes the wireless communication sent via the terminal to be identified that mulitpath transmits Number, wireless signal includes the first training sequence, which includes the folded of multiple first training sequences transmitted via mulitpath Add.
Processor is for the signal to be matched with the second training sequence, to obtain receiving multiple first training sequences Time point, the second training sequence are the information of memory storage, and the first training sequence is identical with the value of the second training sequence.
It is candidate sight line path that processor, which is additionally operable to the path of wireless signal for determining to receive earliest, and what is received earliest is wireless Signal corresponds to first time point in time point.
In another aspect, a kind of computer storage media is provided, for saving as used in above-mentioned WLAN devices Computer software instructions, it includes for performing the program designed by above-mentioned aspect.
Description of the drawings
Fig. 1 is the schematic diagram of a scenario that terminal to be identified communicates with WLAN devices；
Fig. 2 is the schematic diagram of a scenario that uniform linear array receives wireless signal；
Fig. 3 is the principle schematic of the positioning based on angle of arrival；
Fig. 4 is a kind of flow diagram of the method for determining candidate sight line path provided in an embodiment of the present invention；
Fig. 5 is the distribution coordinate diagram of more propagation diameters over time and space；
Fig. 6 is terminal to be identified provided in an embodiment of the present invention and the schematic diagram of a scenario to be communicated between AP by mulitpath；
Fig. 7 is the process schematic that access point provided in an embodiment of the present invention receives wireless signal；
Fig. 8 is that multiple first training sequences after superposition provided in an embodiment of the present invention are related to the progress of the second training sequence Process schematic；
Fig. 9 is the process schematic that sight line path provided in an embodiment of the present invention obtains angle of arrival；
Figure 10 is a kind of structure diagram of WLAN devices provided in an embodiment of the present invention；
Figure 11 is a kind of structure diagram of WLAN devices provided in an embodiment of the present invention.
Specific embodiment
Below by drawings and examples, the technical solution of the embodiment of the present invention is described in further detail.
The communication means that the application provides is applied to the communication network of wireless communication scene, such as Wireless LAN (English： Local area network, WLAN).The WLAN can include terminal and the network equipment.Terminal involved by the application can To include the various handheld devices with wireless communication function, mobile unit, wearable device (English：wearable Device), computing device etc..The network equipment involved by the application can be the access point (English of WLAN：access Point, AP).
Physical layer convergence procedure (the English of WLAN frames：Physical layer convergence procedure, PLCP it is) leading including short training field (English：Short training field, STF) and long training field (English：long Training field, LTF).LTF different froms during the PLCP of the frame structure of various physical layer coding modes is leading.LTF can To include old long training field (English：Legacy-long training field, L-LTF), high-throughput length training word Section (English：High throughput-long training field, HT-LTF) or ultra-high throughput long training field (English Text：Very high throughput-long training field, VHT-LTF).LTF is the fixed string symbol of value. Recipient is identical with the LTF that sender uses.Recipient and sender both know about the value of LTF.The effect of LTF is to realize recipient Carrier frequency calibration between sender, channel estimation and synchronous (time synchronization or Frequency Synchronization).It is same in order to realize Step, the sequence of LTF have good autocorrelation performance in the time domain.That is, the sequence on frequency domain passes through reverse Fourier Conversion process is transformed in time-domain, meets R (ift (L), ift (L)) ≈ δ (n).
Wherein, L represents the frequency domain sequence of LTF, and ift () represents reverse Fourier transformation, and R () represents correlation function.δ(n) Represent impulse function.Impulse function refers to only there is nonzero value when independent variable is 0, is not 0 for 0 duration in independent variable.Independent variable The impulse function that value when being 0 is 1 is also referred to as Dirac delta function.Ift (L) and another ift (L) carries out related calculation and can obtain Obtain impulse function.
STF is also a recipient and the known training sequence of sender, is shorter in length than the sequence of LTF.When first Each symbol in sequence in a STF after carrying out related calculation, can obtain be distributed in time-domain for a string have impulse function The pulse signal of formation, due to the limited length of the sequence of STF, next STF that the sequence with first STF can be caused to be connected Sequence in pulse signal be interfered, it is impossible to accurately obtain the generation time of each pulse signal.Therefore, the application uses LTF determines candidate LOS path.
AP can be according to uniform linear array (English：Uniform linear array, ULA) different antennae battle array in antenna The phase difference for the wireless signal that son receives obtains AoA.As shown in Figure 2.Different antennae a period of time of uniform linear array antenna receives Wireless signal phase difference it is related to the AoA of wireless signal, AP can be obtained after acquiring the phase information of each antenna element To AoA.
Specifically, equipment to be identified sends a wireless signal by mulitpath, wherein the wireless signal per paths All it is a copy of the wireless signal that equipment to be identified is sent, there is LTF.Wherein, the sequence in LTF is long training sequence.
The aerial array of wlan device can be uniform linear array antenna (2-4 antenna element), and wlan device passes through Antenna receives wireless signal.Wlan device is identified and is extracted in wireless signal using the height autocorrelation of the sequence of LTF The sequence of LTF obtains the distribution of the wireless signal arrival time per paths, determines to reach the wireless signal of wlan device at first Path.Since LOS path direction has shortest round, i.e., wlan device is reached at first, therefore can choose and most arrive first The path reached is as LOS path.Since LOS path includes correct angle information, therefore the angle of angle of arrival is carried out for LOS path Degree estimation obtains the AOA of LOS path.According to the location model as shown in Figure 3 based on AoA, equipment to be identified is obtained to AP1 AOA with the LOS path of AP2 is respectively θ1And θ2, then AoA intersection positions are exactly equipment position to be identified.
Below using equipment to be identified as terminal to be identified, wlan device is described for being AP.
Fig. 4 is a kind of method flow schematic diagram of determining candidate sight line path provided in an embodiment of the present invention.Such as Fig. 5 institutes Show, this method can include：
Step 410, the mutiple antennas of AP receive signal, which is to be sent via the terminal to be identified that mulitpath transmits Wireless signal, the signal include signal to be matched.
Wireless signal includes the first training sequence.Signal to be matched is via the multiple of mulitpath transmission in each antenna The superposition of first training sequence.Wherein, the training sequence in the wireless signal that the first training sequence is sent for terminal to be identified, example Such as LTF." first " is not serial number, but to the name of the training sequence in signal, to be different from AP storages, for matching letter Number training sequence.Training sequence in all wireless signals sent by terminal to be identified is all the first training sequence.With AP For linear antenna array, terminal to be identified sends wireless signal, which may pass through direct projection diameter, reflection The mulitpaths such as diameter or scattering diameter are transmitted to the antenna of AP, and wireless signal includes the first LTF.Wherein, the wireless communication per paths Number all it is a copy of the wireless signal that terminal to be identified is sent, there is the first LTF.
Since, there are propagation delay time, wireless signal when reaching AP on every paths will be overlapped, shape between mulitpath Into the signal.
Optionally, the method that traditionally AP can apply cluster distinguishes the mulitpath of transmission wireless signal.AP can be received Collect multiple sample datas, and utilize and cluster the los state that mode judges terminal to be identified, and determine the LOS roads of terminal to be identified Diameter.As shown in figure 5, the data of each sample are represented with a point in coordinate diagram.Each sample be AP receive from one The wireless signal in a path.The horizontal axis of coordinate diagram represents the time t of each sample of reception, and the longitudinal axis represents the AOA of the sample.It is to be identified Terminal sends multiple wireless signals, and each wireless signal reaches AP via multiple paths, and is received by AP.Due to terminal to be identified Movement have continuity, the angle change in each path also has continuity.Therefore AP clusters the point in coordinate diagram.After cluster, AP obtains multiple paths of transmission wireless signal.The cluster of the point of each shape in coordinate diagram represents a path, as P1, P2, P3, P4 and P5.Each path in coordinate diagram may be NLOS paths or LOS path.Wherein, NLOS paths refer to LOS path with Outer path, such as the path of reflection, scattering or refraction.AP can be according to the disperse degree (phase at the cluster midpoint in each path When the size of circle each in coordinate diagram figure), identify the LOS path of AP.However, when terminal to be identified quickly moves, even if There are LOS paths between terminal to be identified and AP, and the disperse degree at the cluster midpoint of the LOS path is also big, so as to cause that can not know Other LOS path.As it can be seen that the method for cluster is the mulitpath by first distinguishing transmission wireless signal, further according to cluster midpoint Disperse degree determine LOS path.Since the method for cluster cannot accurately identify LOS path, but can accurately distinguish out a plurality of The mulitpath of transmission wireless signal is distinguished in path, therefore, the method that AP can utilize cluster.
When the method using cluster distinguishes the mulitpath of transmission wireless signal, AP can be by being configured more antennas (such as 3-4 roots antenna) improves the accuracy of cluster, and the AOA estimated in this way is more accurate, so as to preferably be carried out to LOS path Identification, two or more pieces path cannot be differentiated this two or more pieces Path Recognition into a paths by reducing AP, cause road The possibility of the energy supposition of wireless signal on diameter.
Optionally, since the wireless signal of every paths transmission has respective propagation delay, so the signal r that AP is received Mathematics can be expressed as：
Wherein, τiRepresent the time delay in the i-th path, hiRepresent complex gain of i-th path for the first LTF, L represents LTF's Value, N are the quantity in path, and t is the time independent variable in time-domain.
Optionally, in Orthogonal Frequency Division Multiplexing (English：orthogonal frequency division Multiplexing, OFDM) structures of the LTF on frequency domain can be expressed as in frame：
L-26.26=1,1, -1, -1,1,1, -1,1, -1,1,1,1,1,1,1, -1, -1,1,1, -1,1, -1,1,1,1,1, 0,1, -1, -1,1,1, -1,1, -1,1, -1, -1, -1, -1, -1,1,1, -1, -1,1, -1,1, -1,1,1,1,1 }
L includes 53 elements.The serial number of each element is followed successively by -26, -25 ... ... -1,0,1,2 ... 25,26.It is each A serial number represents a subcarrier serial number in ofdm system frequency domain.On each serial number corresponding element representation subcarrier The data of transmission, such as the -26th serial number subcarrier send the 1, the 0th serial number subcarrier and send 0.
The signal to be matched that the signal that AP is received includes includes multiple with different complex gain information and different delay LTF superposition.
In one example, the wireless communication of terminal transmission to be identified is received by three paths with an antenna element of AP For number.As shown in fig. 6, three paths are respectively A paths, B path and C paths, wireless signal includes the first training sequence L. By wireless environment, AP receives the signal r after being superimposed including three the first training sequences, as shown in Figure 7.
Step 420, AP match signal to be matched with the second training sequence, are passed with obtaining receiving via mulitpath The time point of defeated multiple first training sequences, the second training sequence are the information of AP storages, the first training sequence and the second instruction The value for practicing sequence is identical." second " is not serial number, but the name of the training sequence to AP storages, to be different from the instruction in signal Practice sequence.
AP passes through down coversion according to by collected wireless signal, becomes digital signal after analog-to-digital conversion.To each antenna Digital signal, carry out related operation with the second training sequence for being stored in AP, obtain corresponding pulses signal.Wherein, it is to be identified The first training sequence that terminal is sent and the second training sequence of AP storages are identical training sequences, and there are identical data to believe Breath.
Characteristics of the AP according to pulse signal detaches multiple first training sequences of superposition, obtains each first training sequence Distribution in time-domain.
Optionally, the mathematic(al) representation of pulse signal can be expressed as：
Wherein, L is the value of training sequence, and t is the time independent variable in time-domain.
Pulse signal is the function of the time delay about path.If t=τi, δ (t- τi) be not zero.Therefore, R (r (t), L) Including multiple pulse signals, the time of occurrence of the peak value of each pulse signal is τi.Due to τiFor the time delay in the i-th path, that is, receive Along the time of the LTF of the i-th propagated, and the duration between the starting point of wireless signal and the starting point of LTF is fixed, each The time of occurrence of the peak value of pulse signal can be as the time received along the wireless signal of the i-th propagated.Due to training sequence Row have good autocorrelation performance in the time domain, and the time for receiving wireless signal is identified with LTF, receiving time can be distinguished and connect Near wireless signal has very high resolution ratio in time-domain.Equipment to be identified only needs to send a wireless signal, so that it may To find candidate sight line path by wlan device.
In one example, the nothing of terminal transmission is received by A paths, B path and C paths with an antenna element of AP For line signal.AP is related to the second training sequence L progress including the signal r after three the first training sequences superpositions by reception Operation, wherein, the data information of the second training sequence is identical with the data information of the first training sequence.AP obtains the arteries and veins in A paths Rush signal δA, B path pulse signal δBWith C path pulse signals δC.As it can be seen that pulse signal represents three paths in time-domain Distribution situation, each pulse signal corresponds to a paths, as shown in Figure 8.
Step 430, AP determine the path of signal to be matched received earliest for candidate LOS path, the nothing received earliest Line signal corresponds to first time point in time point.
LOS path refers to the path that wireless signal unobstructedly transmits between AP and terminal to be identified.Due to LOS path It is not influenced and (is not interfered with) by shelter, therefore LOS path can include correct angle information, and be transmitted via LOS path Wireless signal reach AP at first.
First training sequence and the second training sequence are carried out related operation by AP, get pulse signal in time-domain Distribution.AP determines that each antenna respectively connects earliest according to the time point of the reception signal to be matched of mulitpath in each antenna The time point for the signal to be matched received, so as to which the path of signal to be matched received earliest on each antenna is determined as candidate LOS path.
If the LOS path between AP and terminal to be identified is blocked, wireless signal reaches AP via non-LOS path.This AP is also reached earliest there are one wireless signal in a little wireless signals for reaching AP.Therefore, the wireless signal one propagated along LOS path It is fixed to reach AP earliest, but the wireless signal for reaching AP earliest is not necessarily propagated along LOS path.Therefore, AP also determines candidate LOS Whether path is LOS path.Wherein it is determined that there are many ways to whether candidate LOS path is LOS path.If for example, via The intensity for the wireless signal that candidate LOS path is propagated is more than intensity threshold, then AP determines that candidate's LOS path is LOS path.Again For example, if the AOA variations of the respective candidate LOS path of multiple wireless signals that terminal to be identified is sent are less than angle threshold, Then AP determines that candidate's LOS path is LOS path.For another example when the energy of wireless signal transmitted via candidate's LOS path When accounting in the gross energy of the wireless signal transmitted via mulitpath is more than proportion threshold value, AP determines the candidate LOS roads Diameter is LOS path.
Further, after it is LOS path that AP, which determines candidate's LOS path of each antenna in mutiple antennas, AP according to The phase of each LOS path determines the angle of arrival of LOS path.
In fig.9, AP uses linear antenna array, which includes antenna 1, antenna 2 and antenna 3. Antenna spacing between three antennas is d, and three antennas receive the wireless signal of three paths transmission, LOS path and day simultaneously The angle of linear array is angle of arrival θ1.Using antenna 1 as reference antenna, by can be calculated:The phase of antenna 2 is dsin θ1, The phase of antenna 3 is 2dsin θ1..Since the phase difference between antenna can measure acquisition, and d is it is known that AP gets antenna 2 and day The phase difference of line 3 is dsin θ1, thus calculate angle, θ1。
The above method is the progress angle estimation in the environment of linear antenna array, can also use other classes Aerial array carries out angle estimation, and details are not described herein for the embodiment of the present invention.
Further, AP is after the angle of arrival of LOS path is determined, AP extracts angle character from physical layer data, such as The relevant information of time of wireless signal, angle of arrival and terminal to be identified is received, the time of wireless signal is such as sent, treats The identification information of identification terminal.These information are uploaded onto the server and carry out classification processing, server is according to corresponding terminal Media access control (English：Medium access control, MAC) address and wireless signal the letters such as receiving time matching Whether breath as identified the terminal to be positioned and being the angle of arrival of wireless signal calculating that is received in synchronization, this is believed Breath carries out the positioning that terminal to be identified is completed in fusion.
AP is by the way that the second of the signal to be matched in received signal and AP storages is trained in the above embodiments of the present application Sequence is matched, and obtains receiving the time point of multiple first training sequences transmitted via mulitpath, so that it is determined that earliest The path of the wireless signal of reception is candidate sight line path.After it is LOS path that AP, which determines candidate sight line path, AP is according to each The phase information of sight line path in antenna carries out angle estimation to sight line path, obtains the angle of arrival of sight line path.This method kind AP can identify LOS path, and only carry out angle estimation to LOS path, so as to reduce by a wireless signal of reception Calculation amount, effectively shortens positioning time delay, while decrease the occupancy of interface-free resources.
Figure 10 shows a kind of possible structure diagram of WLAN devices involved in above-described embodiment.It should WLAN devices include at least：Receiving unit 1010, processing unit 1020.
Receiving unit 1010, for receiving signal, which includes sending via the terminal to be identified that mulitpath transmits Wireless signal.Wherein, wireless signal includes the first training sequence, and signal includes multiple first instructions transmitted via mulitpath Practice the superposition of sequence.
Processing unit 1020, for signal to be matched with the second training sequence, to obtain receiving multiple first training The time point of sequence, the second training sequence are the information of WLAN devices storage, the first training sequence and the second training The value of sequence is identical.
Processing unit 1020, it is candidate sight line path to be additionally operable to the path of wireless signal for determining to receive earliest, is connect earliest The wireless signal of receipts corresponds to first time point in time point.
Optionally, processing unit 1020 is used to signal and the second training sequence carrying out related operation, to obtain multiple arteries and veins Signal is rushed, and by the time of occurrence of the peak value of multiple pulse signals, the time point as multiple first training sequences of reception.
Optionally, which further includes multiple receiving units 1010, each receiving unit in multiple receiving units 1010 1010 received signals are different.
Wherein, processing unit 1020 be used for by antenna received signal each in mutiple antennas respectively with the second training sequence It is matched, to obtain the time point of multiple first training sequences that each antenna reception is transmitted via mulitpath.Processing is single The time point of wireless signal that member 1020 respectively receives earliest also particularly useful for each antenna in determining mutiple antennas, and according to each The time point for the wireless signal that a antenna respectively receives earliest, determine the wireless signal that receives earliest via path arrival Angle.
The function of each functional unit of the WLAN devices can be realized by each step of above-described embodiment, Therefore, the specific work process of WLAN devices provided in an embodiment of the present invention, does not repeat again herein.
Figure 11 shows the alternatively possible structure diagram of WLAN devices involved in above-described embodiment.
The WLAN devices include at least processor 1110, antenna 1120 and reservoir 1130.
Processor 1110 can be central processing unit (English：Central processing unit, CPU) or CPU With the combination of hardware chip.Above-mentioned hardware chip can be application-specific integrated circuit (English：application-specific Integrated circuit, ASIC), programmable logic device (English：Programmable logic device, PLD) or A combination thereof.Above-mentioned PLD can be Complex Programmable Logic Devices (English：complex programmable logic Device, CPLD), field programmable gate array (English：Field-programmable gate array, FPGA), lead to With array logic (English：Generic array logic, GAL) or its arbitrary combination.Processor 1110 is used to control entire net Network equipment and signal processing.Processor 1110 can include modem 1111.
Modem 1111 is used for modulation /demodulation WLAN signal.Modem 1111 is connected with antenna 1120, to connect It receives and emits WLAN signal.
Memory 1130 can include volatile memory, such as random access memory (RAM)；Memory 1130 also may be used To include nonvolatile memory, such as read-only memory (ROM), flash memory (English：Flash memory), hard disk or Solid state disk.Memory 1130 can also include the combination of the memory of mentioned kind.Memory 1130 is used to store various answer With operating system and data.The data of storage can be transferred to processor 1110 by memory 1130.
It is understood that memory 1130 can be integrated in processor 1110, can also be individually present.
Antenna 1120, for receiving signal, which includes the nothing sent via the terminal to be identified that mulitpath transmits Line signal, wireless signal include the first training sequence, and signal includes multiple first training sequences transmitted via mulitpath Superposition.
Processor 1110, for signal to be matched with the second training sequence, to obtain receiving multiple first training sequences The time point of row, the second training sequence are the value of the information that memory 1130 stores, the first training sequence and the second training sequence It is identical.
Processor 1110, it is candidate sight line path to be additionally operable to the path of wireless signal for determining to receive earliest, is received earliest Wireless signal correspond to time point in first time point.
Due to the embodiment and advantageous effect that each device of the WLAN devices solves the problems, such as in above-described embodiment Method embodiment and advantageous effect shown in Fig. 4 are may refer to, therefore is not repeated again herein.
The step of method or algorithm for being described with reference to the embodiments described herein, can use hardware, processor to perform The combination of software module or the two is implemented.Software instruction can be made of corresponding software module, and software module can be by Deposit in random access memory, flash memory, read-only memory, erasable programmable read-only register (English：erasable Programmable read-only memory, EPROM) memory, Electrically Erasable Programmable Read-Only Memory memory (English： Electrically erasable programmable read-only memory, EEPROM), hard disk, CD-ROM (English Text：Compact disc read-only memory, CD-ROM) or any other form well known in the art storage be situated between In matter.A kind of illustrative storage medium is coupled to processor, so as to enable a processor to from the read information, and Information can be written to the storage medium.Certainly, storage medium can also be the component part of processor.Certainly, it processor and deposits Storage media can also be used as discrete assembly and be present in user equipment.
Those skilled in the art are it will be appreciated that in said one or multiple examples, work(described herein It can be realized with hardware, software, firmware or their arbitrary combination.It when implemented in software, can be by these functions Storage is transmitted in computer-readable medium or as one or more instructions on computer-readable medium or code.
Above-described specific embodiment has carried out further the purpose, technical solution and advantageous effect of the application It is described in detail, it should be understood that the foregoing is merely the specific embodiment of the application, is not used to limit the application Protection domain, all any modification, equivalent substitution, improvement and etc. on the basis of the technical solution of the application, done should all It is included within the protection domain of the application.

Claims (9)

  1. A kind of 1. method of determining candidate sight line path, which is characterized in that the method includes：
    WLAN devices receive signal, and the signal includes sending via the terminal to be identified that mulitpath transmits wireless Signal, the wireless signal include the first training sequence, and the signal includes transmitting via the mulitpath multiple described The superposition of first training sequence；
    The WLAN devices match the signal with the second training sequence, to obtain receiving multiple described first The time point of training sequence, second training sequence are the information of WLAN devices storage, first training Sequence is identical with the value of second training sequence；
    The WLAN devices determine that the path of the wireless signal received earliest is candidate sight line path, described earliest The wireless signal received corresponds to first time point in the time point.
  2. 2. according to the method described in claim 1, it is characterized in that, the WLAN devices instruct the signal and second Practice sequence to be matched, including：
    The signal and the second training sequence are carried out related operation by the WLAN devices, are believed with obtaining multiple pulses Number；
    The WLAN devices are by the time of occurrence of the peak value of the multiple pulse signal, as receiving multiple described first The time point of training sequence.
  3. 3. according to the method described in claim 2, it is characterized in that, the WLAN devices include mutiple antennas, it is described Each antenna received signal is different in mutiple antennas, wherein,
    The WLAN devices match the signal with the second training sequence, to obtain receiving via described a plurality of The time point of multiple first training sequences of path transmission includes：
    The WLAN devices by antenna received signal each in the multiple antenna respectively with the second training sequence into Row matching, to obtain the time point of multiple first training sequences that each antenna reception is transmitted via the mulitpath；
    The WLAN devices determine that the path of the wireless signal received earliest is that candidate sight line path includes：
    The WLAN devices determine the wireless signal that each antenna respectively receives earliest in the multiple antenna Time point；
    The time point of the wireless signal that the WLAN devices respectively receive earliest according to each antenna determines earliest Receive the wireless signal via path angle of arrival.
  4. 4. a kind of WLAN devices, which is characterized in that the equipment includes：Receiving unit and processing unit, wherein,
    The receiving unit, for receiving signal, the signal includes what is sent via the terminal to be identified that mulitpath transmits Wireless signal, the wireless signal include the first training sequence, and the signal includes transmitting via the mulitpath multiple The superposition of first training sequence；
    The processing unit, for the signal to be matched with the second training sequence, to obtain receiving multiple described first The time point of training sequence, second training sequence are the information of WLAN devices storage, first training Sequence is identical with the value of second training sequence；
    The processing unit is additionally operable to determine that the path of the wireless signal that receives earliest is candidate sight line path, it is described most The wireless signal early received corresponds to first time point in the time point.
  5. 5. equipment according to claim 4, which is characterized in that the processing unit, for the signal and second to be instructed Practice sequence and carry out related operation, to obtain multiple pulse signals, and by the time of occurrence of the peak value of the multiple pulse signal, make To receive the time point of multiple first training sequences.
  6. 6. equipment according to claim 5, which is characterized in that the equipment further includes multiple receiving units, the multiple Each receiving unit received signal is different in receiving unit, wherein,
    The processing unit, is used for：
    Antenna received signal each in the multiple antenna is matched respectively with the second training sequence, to obtain each day The time point of multiple first training sequences that line reception is transmitted via the mulitpath；
    Determine the time point of the wireless signal that each antenna respectively receives earliest in the multiple antenna, and according to each day The time point of the wireless signal that line respectively receives earliest, determine the wireless signal that receives earliest via path Angle of arrival.
  7. 7. a kind of WLAN devices, which is characterized in that the equipment includes：Antenna, processor and memory,
    The antenna, for receiving signal, the signal includes sending via the terminal to be identified that mulitpath transmits wireless Signal, the wireless signal include the first training sequence, and the signal includes transmitting via the mulitpath multiple described The superposition of first training sequence；
    The processor, for the signal to be matched with the second training sequence, to obtain receiving multiple first instructions Practice sequence time point, second training sequence be the memory storage information, first training sequence with it is described The value of second training sequence is identical；
    The processor, it is candidate sight line path to be additionally operable to the path of the wireless signal for determining to receive earliest, described earliest The wireless signal received corresponds to first time point in the time point.
  8. 8. equipment according to claim 7, which is characterized in that the processor, for the signal and second to be trained Sequence carries out related operation, to obtain multiple pulse signals, and by the time of occurrence of the peak value of the multiple pulse signal, as Receive the time point of multiple first training sequences.
  9. 9. equipment according to claim 8, which is characterized in that the quantity of the antenna is multiple, in the multiple antenna Each antenna received signal is different, wherein,
    The processor, is used for：
    Antenna received signal each in the multiple antenna is matched respectively with the second training sequence, to obtain each day The time point of multiple first training sequences that line reception is transmitted via the mulitpath；
    Determine the time point of the wireless signal that each antenna respectively receives earliest in the multiple antenna, and according to each day The time point of the wireless signal that line respectively receives earliest, determine the wireless signal that receives earliest via path Angle of arrival.
CN201611219604.0A 2016-12-26 2016-12-26 Determine the method and WLAN devices of candidate's sight line path Pending CN108243476A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
CN201611219604.0A CN108243476A (en) 2016-12-26 2016-12-26 Determine the method and WLAN devices of candidate's sight line path
PCT/CN2017/118023 WO2018121438A1 (en) 2016-12-26 2017-12-22 Method for recognizing line-of-sight path, and wireless device
EP17888978.8A EP3550890B1 (en) 2016-12-26 2017-12-22 Method for recognizing line-of-sight path, and wireless device
EP17889459.8A EP3554138A4 (en) 2016-12-26 2017-12-22 Method for determining candidate line-of-sight path, and wireless local area network device
JP2019534848A JP6752371B2 (en) 2016-12-26 2017-12-22 Methods and radios for identifying line-of-sight routes
PCT/CN2017/118018 WO2018121437A1 (en) 2016-12-26 2017-12-22 Method for determining candidate line-of-sight path, and wireless local area network device
US16/449,880 US20190313363A1 (en) 2016-12-26 2019-06-24 Method for identifying line of sight path and wireless device
US16/452,036 US20190320405A1 (en) 2016-12-26 2019-06-25 Method for Determining Candidate Line of Sight Path and Wireless Local Area Network Device

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