CN107367723A - A kind of method and apparatus of measurement distance - Google Patents

A kind of method and apparatus of measurement distance Download PDF

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Publication number
CN107367723A
CN107367723A CN201610319211.0A CN201610319211A CN107367723A CN 107367723 A CN107367723 A CN 107367723A CN 201610319211 A CN201610319211 A CN 201610319211A CN 107367723 A CN107367723 A CN 107367723A
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carrier signal
phase
subcarrier
transmission range
equipment
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CN107367723B (en
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杨晖
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A kind of method and apparatus of measurement distance, for solving current distance measuring method than technical problem relatively difficult to achieve.This method includes：Receive the first multi-carrier signal；The first multi-carrier signal is analyzed, to obtain multiple actual phase differences of M subcarrier in the first multi-carrier signal, actual phase difference is the phase difference between two subcarriers in M subcarrier；Calculate multiple phase fluctuation values corresponding with multiple actual phase differences, difference of the phase fluctuation value between actual phase difference and original phase difference；Phase difference before original phase difference is sent for the first multi-carrier signal in M subcarrier between two subcarriers；The phase fluctuation average value of the first multi-carrier signal is calculated, phase fluctuation average value is that multiple phase fluctuation values are averaging to obtain；According to the phase fluctuation average value of the mapping relations and the first multi-carrier signal of phase fluctuation average value and transmission range, the transmission range of the first multi-carrier signal is determined.

Description

A kind of method and apparatus of measurement distance
Technical field
The present invention relates to communication technical field, more particularly to a kind of method and apparatus of measurement distance.
Background technology
Positioning is the popular application field of comparison at present, such as can be used for carrying out indoor navigation, thing to user Product tracking etc..It is a kind of localization method of main flow wherein by distance measuring method positioning, distance measuring method can be point The distance between node to be positioned and multiple anchor nodes are not measured, recycle multigroup distance to determine by similar triangle The location algorithms such as position are positioned.
Existing distance measuring method be typically all using the time difference come ranging, such as, can utilize signal source send Signal reach time difference of different monitoring station and come measurement signal source the distance between to monitoring station, to utilize Time difference, it is obviously desirable to synchronous between each monitoring station.It can be seen that current distance measuring method is due to being when utilizing Between difference carry out ranging, so in order to ensure that measurement accuracy reaches requirement, higher is required to the synchronous of equipment, and one As to accomplish that stringent synchronization is difficult between equipment under actual scene, therefore using the time difference distance measuring method ratio Relatively it is difficult to.
The content of the invention
The embodiment of the present invention provides a kind of method and apparatus of measurement distance, for solving current distance measuring method Than technical problem relatively difficult to achieve.
First aspect, there is provided a kind of method of measurement distance, this method can apply to receiving device, the party Method can include：Receive and send the first multi-carrier signal that equipment is sent, analyze more than described first received Carrier signal, to obtain multiple actual phase differences of M subcarrier in the first multi-carrier signal, actual phase Potential difference is the phase difference between two subcarriers in the M subcarrier received, wherein, M is more than 2 Positive integer.Multiple phase fluctuation values corresponding with multiple actual phase differences are calculated, phase fluctuation value is M The difference of the actual phase differences of two subcarriers in individual subcarrier and original phase difference, original phase difference are the Before one multi-carrier signal is sent by transmission equipment, the phase difference between two subcarriers in M subcarrier. The phase fluctuation average value of the first multi-carrier signal is calculated, phase fluctuation average value is that multiple phase fluctuation values are asked Averagely obtain, the first multi-carrier signal is determined according to the mapping relations of phase fluctuation average value and transmission range Transmission range, the transmission range of the first multi-carrier signal is sends the distance between equipment and receiving device.
Different from prior art using the time difference come ranging, the embodiments of the invention provide a kind of brand-new survey Away from mode.In embodiments of the present invention, receiving device will analyze the first overloading after receiving the first multi-carrier signal Ripple signal, multiple actual phase differences of M subcarrier are obtained, by actual phase difference and M subcarrier Original phase difference does difference to obtain phase fluctuation value, then by being averaging phase fluctuation value to obtain first The phase fluctuation average value of multi-carrier signal, so as to according to the phase fluctuation average value and transmission distance pre-set Mapping relations between are assured that the transmission range of the first multi-carrier signal, and the embodiment of the present invention determines The transmission range for carrying phase difference and the first multi-carrier signal between the subcarrier of the first multi-carrier signal has Close, therefore ranging can be completed by calculating the phase difference between the subcarrier for carrying the first multi-carrier signal, Without using the time difference, no matter how many receiving device, each can be provided according to the embodiment of the present invention Method complete ranging, each receiving device Self-operating, even if there is multiple receiving devices, without It is required that must be synchronous between receiving device, the synchronous of equipment is required than relatively low, it is clear that this distance measuring method is more Be advantageous to the application in actual scene.
, may be relevant with transmission range and the phase of subcarrier changes, it is also possible to the original with subcarrier Beginning phase is relevant, and it is poor to subtract original phase in the embodiment of the present invention with actual phase difference, by subtracting each other it Result afterwards determines transmission range, thus equivalent to eliminating original phase for the phase of subcarrier Influence, remaining part can consider to be influenceed substantially caused by transmission range, by remaining part come Transmission range is determined, can make it that the result determined is more accurate.
Optionally, multi-carrier signal can refer to obtain after in sequence modulation to be sent to multiple subcarriers Signal.In one embodiment, multi-carrier signal can be for example ofdm signal, may be used also certainly Can be other multi-carrier signals.
Optionally, mapping relations are in addition to it can be the relation between phase fluctuation average value and transmission range The relation between other specification and transmission range is can also be, for example can be phase fluctuation value and transmission range Between relation, such as after multiple phase fluctuation values are obtained, according to each phase fluctuation value and phase fluctuation Mapping relations between value and transmission range can determine a transmission range, you can to determine multiple transmission Distance, for example multiple transmission ranges are averaged, the transmission range of the first multi-carrier signal can also be obtained. Natural mapping relation can also be other parameters relevant with the phase of M subcarrier and have with transmission range Relation between the parameter of pass, the embodiment of the present invention are not restricted.
, can also be according to multiple with reference in a first aspect, in the first possible implementation of first aspect Different transmission ranges and the multiple phase fluctuation average values being calculated under multiple different transmission ranges, Generate mapping relations.
I.e., it is possible to mapping relations are set in the case of transmission range and phase fluctuation average value are all known, side Formula is fairly simple.And mapping relations are pre-set, so as to which subsequently distance can be determined according to mapping relations, To simplify ranging process.
With reference to the first possible implementation of first aspect, in second of possible realization of first aspect In mode, multiple phases are calculated according to multiple different transmission ranges and under multiple different transmission ranges Position fluctuation average value, generates mapping relations, can be accomplished by the following way：Multiple different transmission are set Distance, put down according to multiple different transmission ranges and multiple phase fluctuations under multiple different transmission ranges Average, establish mapping relations.Wherein, under each transmission range in multiple different transmission ranges, First receiving device can be by being calculated under multiple different transmission ranges by performing following operation Multiple phase fluctuation average values：Receive and send the second multi-carrier signal that equipment is sent, the second multi-carrier signal Including M subcarrier, multiple phase fluctuation values of M subcarrier in the second multi-carrier signal are calculated, Calculate the phase fluctuation average value of the second multi-carrier signal.
That is, during mapping relations are set, the process for calculating phase fluctuation value may be referred to calculating first The process of the phase fluctuation value of multi-carrier signal, that is to say, that multiple transmission ranges can be set, to each Transmission range can calculate a phase fluctuation average value, so as in transmission range and phase fluctuation average value In the case of all known, mapping relations can be generated, calculating phase fluctuation during generating mapping relations puts down The mode of phase fluctuation average value of the mode of average with calculating the multi-carrier signal for ranging is consistent, so The distance of determination is more accurate.
With reference to the possible implementation of the first of first aspect or first aspect or second of possible realization Mode, in the third possible implementation of first aspect, the first multi-carrier signal received is analyzed, , can be in the following manner to obtain multiple actual phase differences of M subcarrier in the first multi-carrier signal Realize：Selection phase difference corresponding with the first multi-carrier signal carries from default multiple phase difference extraction strategies Strategy is taken, strategy is extracted according to phase difference corresponding with the first multi-carrier signal, analyzes the first multi-carrier signal, To obtain multiple actual phase differences of M subcarrier in the first multi-carrier signal.Accordingly, according to phase Average value and the mapping relations of transmission range and the phase fluctuation average value of the first multi-carrier signal are fluctuated, really The transmission range of fixed first multi-carrier signal, can be accomplished by the following way：From multiple phase ripples of storage In the mapping relations of dynamic average value and transmission range, mapping relations corresponding with the first multi-carrier signal are selected, According to mapping relations corresponding with the first multi-carrier signal, the transmission range of the first multi-carrier signal is determined.
I.e., it is possible to strategy is extracted using phase difference set in advance to calculate multiple reality of M subcarrier Phase difference, and a variety of phase difference extraction strategies can be preset, so can for different multi-carrier signals To extract strategy using different phase differences, or can also be selected using not for same multi-carrier signal Same phase difference extraction strategy, mode are more flexible.For the first multi-carrier signal, from a variety of phase differences When the extraction of selected phase difference is tactful in extraction strategy, phase difference corresponding with the first multi-carrier signal can be selected Extraction strategy, that is, the phase difference extraction strategy of the feature of the first multi-carrier signal is considered, so could more Multiple phase differences of M subcarrier are calculated exactly.
It is similar, a variety of mapping relations can also be preset, so can be with for different multi-carrier signals Using different mapping relations, or can also select to use different mappings for same multi-carrier signal Relation, mode are more flexible.For the first multi-carrier signal, from a variety of mapping relations Choose for user close When being, mapping relations corresponding with the first multi-carrier signal can be selected, that is, consider the first multi-carrier signal Feature mapping relations, so could relatively accurately calculate multiple phase differences of M subcarrier.
Optionally, also may be used for the first multi-carrier signal, selected phase difference extraction strategy and mapping relations To be corresponding, because phase difference extracts the calculation of strategy and when setting mapping relations for actual phase The calculation of potential difference is consistent, therefore selects corresponding phase difference extraction strategy and mapping relations, is helped In it is determined that accurate transmission range.
With reference to the possible implementation of the first of first aspect or first aspect to the third possible realization The possible implementation of any of mode, in the 4th kind of possible implementation of first aspect, the One multi-carrier signal can be pilot signal or targeting signal.
Pilot signal and targeting signal are generally for being all known for equipment, if the first multi-carrier signal It is pilot signal or this kind of known signal of targeting signal, then calculating the original phase of M subcarrier It can directly be calculated by the first receiving device when poor, be transmitted further to first without being calculated by transmission equipment and connect Receiving unit, reduce the interaction between equipment.
Second aspect, there is provided a kind of equipment of measurement distance, the equipment can include processor, memory, Receiver and bus.Wherein, memory is connected with processor by bus, and memory can be used for storage meter Calculation machine instructs, and processor can be used for the computer instruction for performing memory storage.When computer equipment is run When, processor operation computer instruction so that computer equipment performs following operate：By calling receiver Receive and send the first multi-carrier signal that equipment is sent, the first multicarrier that analysis is received by receiver is believed Number, to obtain multiple actual phase differences of M subcarrier in the first multi-carrier signal, actual phase difference is The phase difference between two subcarriers in the M subcarrier received, wherein, M is more than 2 just Integer.Multiple phase fluctuation values corresponding with multiple actual phase differences are calculated, phase fluctuation value is M son The difference of the actual phase difference of two subcarriers in carrier wave and original phase difference, original phase difference are more than first Before carrier signal is sent by transmission equipment, the phase difference between two subcarriers in M subcarrier, calculate The phase fluctuation average value of first multi-carrier signal, phase fluctuation average value are that multiple phase fluctuation values are averaging Obtain, the biography of the first multi-carrier signal is determined according to the mapping relations of phase fluctuation average value and transmission range Defeated distance, the transmission range of the first multi-carrier signal are to send the distance between equipment and receiving device.
With reference to second aspect, in the first possible implementation of second aspect, when computer equipment is transported During row, processor operation computer instruction, computer equipment is also caused to perform following operate：According to it is multiple not With transmission range and multiple phase fluctuation average values are calculated under multiple different transmission ranges, generate Mapping relations.
With reference to the first possible implementation of second aspect, in second of possible realization of second aspect It is multiple being calculated according to multiple different transmission ranges and under multiple different transmission ranges in mode Phase fluctuation average value, generates the aspect of mapping relations, and the processor runs computer instruction so that meter Calculate machine equipment and perform following operate：Multiple different transmission ranges are set, according to multiple different transmission ranges With multiple phase fluctuation average values under multiple different transmission ranges, mapping relations are established.Wherein, exist Under each transmission range in multiple different transmission ranges, processor is made by running computer instruction Obtain computer equipment and perform following operation, the multiple phase fluctuations calculated under multiple different transmission ranges are put down Average：The second multi-carrier signal for sending equipment by calling receiver to receive and sending, the second multi-carrier signal Including M subcarrier, M subcarrier in the second multi-carrier signal by receiver reception is calculated Multiple phase fluctuation values, calculate the phase fluctuation average value of the second multi-carrier signal received by receiver.
With reference to the possible implementation of the first of second aspect or second aspect or second of possible realization Mode, in the third possible implementation of second aspect, in the first multicarrier letter that analysis receives Number, to obtain the aspect of multiple actual phase differences of M subcarrier in the first multi-carrier signal, processor Run computer instruction so that computer equipment performs following operate：From default multiple phase difference extraction plans Slightly the extraction of middle selection corresponding with the first multi-carrier signal phase difference is tactful, according to the first multi-carrier signal pair The phase difference extraction strategy answered, analyzes the first multi-carrier signal, to obtain in the first multi-carrier signal M Multiple actual phase differences of subcarrier.Accordingly, in the mapping according to phase fluctuation average value and transmission range The phase fluctuation average value of relation and the first multi-carrier signal, determine the transmission range of the first multi-carrier signal Aspect, processor operation computer instruction so that computer equipment performs following operate：From the more of storage In the mapping relations of individual phase fluctuation average value and transmission range, reflect corresponding with the first multi-carrier signal is selected Relation is penetrated, according to mapping relations corresponding with the first multi-carrier signal, determines the transmission of the first multi-carrier signal Distance.
With reference to the possible implementation of the first of second aspect or second aspect to the third possible realization The possible implementation of any of mode, in the 4th kind of possible implementation of second aspect, the One multi-carrier signal can be pilot signal or targeting signal.
The third aspect, there is provided the equipment of another measurement distance, the equipment can include receiving module, analysis Module, computing module and determining module.Wherein, receiving module, which can be used for receiving, sends equipment is sent the One multi-carrier signal, analysis module can be used for analyzing the first multi-carrier signal that receiving module receives, with Multiple actual phase differences of M subcarrier in the first multi-carrier signal are obtained, actual phase difference can be connect The phase difference between two subcarriers in the M subcarrier received, wherein, M is just whole more than 2 Number.Computing module can be used for calculating multiple phase fluctuation values corresponding with multiple actual phase differences, phase ripple Dynamic value can be two subcarriers in M subcarrier actual phase difference and original phase difference difference, Original phase difference can be two sons in M subcarrier before the first multi-carrier signal is sent by transmission equipment Phase difference between carrier wave.The phase fluctuation that computing module can be also used for calculating the first multi-carrier signal is averaged Value, phase fluctuation average value can multiple phase fluctuation values be averaging to obtain.Determining module can be used for The transmission range of the first multi-carrier signal is determined according to the mapping relations of phase fluctuation average value and transmission range, The transmission range of first multi-carrier signal can send the distance between equipment and receiving device.
With reference to the third aspect, the equipment can also include being used to perform described in the various implementations of first aspect Method module.
Fourth aspect, there is provided the method for another measurement distance, this method can apply to receiving device, should Method can include：Receive and send the first multi-carrier signal that equipment is sent, analyze described first received Multi-carrier signal, it is actual to obtain multiple actual phase differences of M subcarrier in the first multi-carrier signal Phase difference is the phase difference between two subcarriers in the M subcarrier received, wherein, M is big In 2 positive integer.Multiple phase fluctuation values corresponding with multiple actual phase differences are calculated, phase fluctuation value is What the phase difference of two subcarriers in M subcarrier obtained, phase fluctuation value is actual phase difference With the difference between original phase difference, before original phase difference is sent for the first multi-carrier signal by transmission equipment, M The phase difference between two subcarriers in individual subcarrier.Closed according to the mapping of phase fluctuation value and transmission range System determines multiple transmission ranges corresponding to multiple phase fluctuation values, calculates transmission range average, determines transmission distance From the transmission range that average is the first multi-carrier signal, the transmission range of the first multi-carrier signal can be sent The distance between equipment and receiving device.Wherein, transmission range average is that multiple transmission ranges are averaging to obtain 's.
In embodiments of the present invention, receiving device will analyze the first multicarrier letter after receiving the first multi-carrier signal Number, multiple actual phase differences of M subcarrier are obtained, by the original of actual phase difference and M subcarrier Phase difference does difference to obtain phase fluctuation value, can be with by the mapping relations of phase fluctuation value and transmission range Obtain multiple transmission ranges, then multiple transmission ranges are averaging and can be obtained by transmission range average, can be with It is just the transmission range of the first multi-carrier signal to determine transmission range average, and the embodiment of the present invention determines carrying the Phase difference between the subcarrier of one multi-carrier signal is relevant with the transmission range of the first multi-carrier signal, therefore The phase difference between subcarrier by calculating the first multi-carrier signal of carrying can complete ranging, without using Time difference, no matter how many receiving device, can be each complete according to method provided in an embodiment of the present invention Into ranging, each receiving device Self-operating, even if there is multiple receiving devices, without requiring to receive Must be synchronous between equipment, the synchronous of equipment is required than relatively low, it is clear that this distance measuring method is more beneficial for reality Application in the scene of border.
, may be relevant with transmission range and the phase of subcarrier changes, it is also possible to the original with subcarrier Beginning phase is relevant, and it is poor to subtract original phase in the embodiment of the present invention with actual phase difference, by subtracting each other it Result afterwards determines transmission range, thus equivalent to eliminating original phase for the phase of subcarrier Influence, remaining part can consider to be influenceed substantially caused by transmission range, by remaining part come Transmission range is determined, can make it that the result determined is more accurate.
In addition, the mapping relations of fourth aspect are different for the mapping relations of first aspect, because This is also different for the application mode of mapping relations.It can be seen that mapping relations can have it is a variety of, such as with Mapping relations between the related parameter of phase and the parameter related to transmission range can serve as the present invention Mapping relations in embodiment, then those skilled in the art also know how according to different mapping passes naturally It is to complete ranging.
Optionally, the method for fourth aspect can be performed by the equipment that second aspect or the third aspect provide.
5th aspect, there is provided computer-readable storage medium, wherein, the computer-readable storage medium program storage, The program includes the part or all of step of any distance-finding method described in first aspect when performing.
The processing mode of the phase for M subcarrier provided by the embodiment of the present invention, Ke Yiji Calculation obtains phase fluctuation average value, further according between phase fluctuation average value set in advance and transmission range Mapping relations are assured that the transmission range of the first multi-carrier signal, without using the time difference, for equipment Synchronously require relatively low, and just because of synchronously requiring relatively low to equipment so that provided in an embodiment of the present invention Project plan comparison is easily realized, is easy to promote the use of.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to institute in the embodiment of the present invention The accompanying drawing needed to use is briefly described, it should be apparent that, accompanying drawing described below is only the present invention Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of possible model of ofdm communication system；
Fig. 2 is a kind of possible flow chart of the method for measurement distance provided in an embodiment of the present invention；
Fig. 3 is a kind of possible between transmission range provided in an embodiment of the present invention and phase fluctuation average value The schematic diagram of performance curve；
Fig. 4 is a kind of possible structural representation of the equipment of measurement distance provided in an embodiment of the present invention；
Fig. 5 is a kind of possible structured flowchart of the equipment of measurement distance provided in an embodiment of the present invention.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the present invention Accompanying drawing in embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that Described embodiment is part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention Embodiment, those of ordinary skill in the art obtained under the premise of creative work is not made it is all its His embodiment, belong to the scope of protection of the embodiment of the present invention.
The techniques described herein may be used in ofdm communication system, could be applicable to other similar communications System.
Hereinafter, the part term in the embodiment of the present invention is explained, in order to people in the art Member understands.
1) receiving device, such as terminal device can be included, or the network equipment can also be included, wherein The network equipment can for example include access network equipment, such as base station, or can also include equipment of the core network.
2) equipment is sent, such as terminal device can be included, or the network equipment can also be included, wherein The network equipment can for example include access network equipment, such as base station, or can also include equipment of the core network.
Wherein, send the type of equipment and the type of receiving device can be the same or different, for example, hair It can be terminal device to send equipment and receiving device, or it can be network equipment receiving device to send equipment It can be terminal device, etc..
3) terminal device, refer to the equipment for providing a user voice and/or data connectivity, such as can wrap Include the portable equipment with wireless connecting function or be connected to the processing equipment of radio modem.Should Terminal device can be communicated through wireless access network (Radio Access Network, RAN) with core net, Voice and/or data are exchanged with RAN.The terminal device can include UE, wireless terminal device, movement Terminal device, signing unit (Subscriber Unit), signing station (Subscriber Station), movement station (Mobile Station), mobile station (Mobile), distant station (Remote Station), access point (Access Point, AP), RTU (Remote Terminal), access terminal equipment (Access Terminal), Subscriber terminal equipment (User Terminal), user agent (User Agent) or subscriber's installation (User Device) Deng.For example, mobile phone (or being " honeycomb " phone) can be included, the meter with mobile terminal device Calculation machine, special-purpose terminal equipment in NB-IoT, portable, pocket, hand-held, built-in computer Or vehicle-mounted mobile device.For example, PCS (Personal Communication Service, PCS) phone, wireless phone, Session initiation Protocol (SIP) phone, WLL (Wireless Local Loop, WLL) stand, the equipment such as personal digital assistant (Personal Digital Assistant, PDA).
4) OFDM technology by multi-carrier modulation (Multi-Carrier Modulation, MCM) develop and Come, be one of implementation of multi-carrier transmission scheme.The main thought of OFDM technology is to break a channel into Some orthogonal sub-channels, high-speed data signal is converted into parallel low speed sub-data flow, by low speed subdata Stream is modulated in orthogonal subchannel respectively to be transmitted, that is, what is transmitted is orthogonal signalling.Orthogonal signalling can be with By being separated in receiving terminal using correlation technique, the intersymbol interference between subchannel can be so reduced (Inter Symbol Interference, ISI).In addition, the signal bandwidth on per sub-channels is less than channel Coherence bandwidth, therefore per flatness decline can be regarded on sub-channels as, so as to eliminate intersymbol interference, And because the bandwidth of every sub-channels is only the sub-fraction of former channel width, channel equalization becomes relative Easily.
Each carrier wave in OFDM is mutually orthogonal, and each carrier wave has integer in a symbol time The zero point of carrier cycle, each spectrum of carrier zero point and adjacent carrier is overlapping, so just reduces intercarrier Interference.Because intercarrier overlaps, so it is than traditional frequency division multiple access ((Frequency division Multiple access, FDMA) technology improves band efficiency.
5) term in the embodiment of the present invention " system " and " network " can be used interchangeably." multiple " refer to two Individual or two or more."and/or", the incidence relation of affiliated partner being described, expression may have three kinds of relations, For example, A and/or B, can be represented：Individualism A, while A and B be present, individualism B this Three kinds of situations.In addition, character "/", unless otherwise specified, it is a kind of "or" to typically represent forward-backward correlation object Relation.
A kind of possible model of ofdm communication system is first introduced with reference to accompanying drawing below.
Fig. 1 is referred to, in signal to be sent, equipment is sent and first reflects original bit sequence progress signal Penetrate, original bit sequence is signal to be sent, carries out serial to parallel conversion afterwards, then import fast Fourier Inverse transformation (Inverse Fast Fourier Transform, IFFT) module, carries out OFDM modulation again afterwards, Modulate and parallel sequence is become into serial sequence, then be that prefix, Ran Houjin are protected in serial sequence addition Row analog/digital conversion, LPF and up-conversion, wireless channel is sent to finally by radio frequency.Receiving device leads to Wireless channel reception signal is crossed, the signal of reception is subjected to down coversion, LPF and D/A switch, for letter Number remove protection prefix, obtain serial sequence, then serial to parallel conversion is carried out to serial sequence, obtain parallel Sequence, parallel sequence is imported into Fast Fourier Transform (FFT) (Fast Fourier Transformation, FFT) Module carries out OFDM demodulation, then carries out parallel serial conversion to the result of demodulation, obtains serial sequence, then will Serial sequence carries out signal mapping, obtains original bit sequence, that is, the signal transmitted.Wherein exist In receive process, when being related to receiver algorithm, Timing Synchronization, Frequency Synchronization and offset estimation can be increased Deng synchronization and the different algorithm such as frequency deviation is entangled, these are all the common signal processing modes in OFDM fields, Here seldom repeat.
Scheme provided in an embodiment of the present invention is introduced below in conjunction with the accompanying drawings.
Refer to Fig. 2, there is provided a kind of method of measurement distance, this method can apply to receiving device, example Receiving device as hereinafter applied this method is referred to as the first receiving device, and the first receiving device for example may be used Or can also be such as preceding any one net introduced to be such as preceding any one terminal device introduced Network equipment.The flow of this method is described as follows：
Step 201：Receive and send the first multi-carrier signal that equipment is sent；
Step 202：The first multi-carrier signal received is analyzed, so that M are obtained in the first multi-carrier signal Multiple actual phase differences of subcarrier, actual phase difference are that two sons in the M subcarrier received carry Phase difference between ripple, wherein, M is the positive integer more than 2；
Step 203：Multiple phase fluctuation values corresponding with multiple actual phase differences are calculated, phase fluctuation value is The difference of actual phase difference and the original phase difference of two subcarriers in M subcarrier；Original phase difference is Before multi-carrier signal is sent by transmission equipment, the phase difference between two subcarriers in M subcarrier；
Step 204：The phase fluctuation average value of the first multi-carrier signal is calculated, phase fluctuation average value is more Individual phase fluctuation value is averaging what is obtained；
Step 205：Determine that the first multicarrier is believed according to the mapping relations of phase fluctuation average value and transmission range Number transmission range, the transmission range of the first multi-carrier signal is sends the distance between equipment and receiving device.
The method for the measurement distance that the embodiment of the present invention is provided, indoor ranging was both can apply to, can also Applied to outdoor ranging, i.e. can both complete short distance ranging, can also complete long away from ranging, application It is relatively broad.
In one embodiment, the method for measurement distance provided in an embodiment of the present invention may be more suitable for interior The shorter ranging scene of distance that ranging etc. need to measure, such as, the distance that need to be measured can be less than the one of phase Length corresponding to the individual cycle, cycle such as generally 2 π of phase, and length and subcarrier corresponding to 2 π Bandwidth is relevant with subcarrier spacing, and in such a scenario, the required precision for measurement is higher, apart from phase Bigger error may be almost will result in, if isometric away from distance measuring method, measurement using satellite fix Precision may have a greatly reduced quality, may measurement result can differ larger with actual range, and use this hair The distance measuring method that bright embodiment provides, determine distance by carrying out a series of processing to phase, it is clear that short It is higher away from ranging field more dominant, ratio of precision.
In another embodiment, it is fixed to method provided in an embodiment of the present invention is applied into the outdoor whole world Position system (Global Positioning System, GPS) ranging, the distance that need to be measured are typically greater than 2 Length corresponding to π, then 2 π of how many integral multiple may relate to estimate, possible difficulty can compare It is larger, but if also can be achieved on if function for the equipment of ranging is fairly perfect.
In one embodiment, the first multi-carrier signal for example can be arbitrary ofdm signal (bag Include at least three subcarriers), or in another embodiment, the first multi-carrier signal can also be led Frequency signal, or in another embodiment, the first multi-carrier signal can also be targeting signal, etc., The embodiment of the present invention is not restricted.For example, if the first multi-carrier signal is pilot signal or targeting signal, Equipment is so sent after the first multi-carrier signal is sent to the first receiving device, can also be received to first Equipment sends other signals, such as can send data-signal, because the embodiment of the present invention is important to notice that First multi-carrier signal, therefore excessive introduction is not done for whether transmission equipment also have sent other signals, can With reference to prior art.
In one embodiment, the first multi-carrier signal can be ofdm signal, e.g. receive and set The standby signal received by wireless channel, thus the first multi-carrier signal be by multiple orthogonal subcarriers come Carrying, then may have phase difference between different subcarriers.Such as carry the first multi-carrier signal The quantity of subcarrier be M, can be according to default after the first receiving device receives the first multi-carrier signal The phase difference of M subcarrier of phase difference extraction strategy extraction the first multi-carrier signal of carrying, that is, extract M The phase difference of each two subcarrier in individual subcarrier, each two subcarrier here, it can be understood as M Individual subcarrier will all participate in the calculating of phase difference, and presumable subcarrier is only involved in obtaining the meter of a phase difference Calculate, it is also possible to which the subcarrier having can participate in obtaining the calculating of multiple phase differences, and the first receiving device can extract First receiving device is received after the first multi-carrier signal extract two by multiple phase differences, the embodiment of the present invention Phase difference between subcarrier is referred to as the actual phase difference between subcarrier.In addition, the first receiving device may be used also With the phase between each two subcarrier in the first multi-carrier signal of acquisition before transmitting M subcarrier Difference, it is also possible to obtain multiple phase differences, the embodiment of the present invention send out the first multi-carrier signal by transmission equipment The phase difference between two subcarriers before sending in M subcarrier is referred to as the original phase between subcarrier Difference, for a multi-carrier signal, extraction original phase difference and extraction actual phase difference can utilize same One phase difference extraction strategy., can be by reality after multiple actual phase differences and multiple original phase differences is obtained Phase difference and original phase difference do difference, and so as to obtain multiple differences, the embodiment of the present invention is by actual phase difference Difference between original phase difference is referred to as the phase fluctuation value of subcarrier.Because multiple phase fluctuations are obtained Value, therefore the average value of multiple phase fluctuation values can be calculated, when calculating average value, can calculate common Arithmetic mean of instantaneous value, can also either calculate weighted average or mean square can also be calculated, or Person can also calculate quadratic sum average, or can also calculate weighted average etc., and the application is average to calculating The method of value does not limit.The average value of phase fluctuation value is referred to as phase fluctuation average value by the embodiment of the present invention, First receiving device can prestore the mapping relations between phase fluctuation average value and transmission range, then After the phase fluctuation average value of the first multi-carrier signal is obtained, according to phase fluctuation average value and transmission range Between mapping relations be assured that the transmission range of the first multi-carrier signal, the biography of the first multi-carrier signal The distance between defeated distance namely the first receiving device and transmission equipment.
Or in another embodiment, the mapping relations can also be between phase fluctuation value and transmission range Relation.For example, after multiple phase fluctuation values corresponding with multiple actual phase differences are calculated, can basis Phase fluctuation value and the mapping relations of transmission range determine the corresponding multiple transmission ranges of multiple phase fluctuation values, Transmission range average can be calculated, and the transmission distance that transmission range average is the first multi-carrier signal can be determined From, wherein, the transmission range can of the first multi-carrier signal be send between equipment and receiving device away from From.Wherein, transmission range average can multiple transmission ranges be averaging to obtain.It should be understood that the mapping The data that relation can be mapping table or be stored in otherwise in receiving device.
Optionally, M subcarrier can be whole subcarriers for carrying the first multi-carrier signal, or Can also be the portion subcarriers for carrying the first multi-carrier signal, such as carrying the first multicarrier letter Number the quantity of subcarrier be more than M, can be selected from whole subcarriers for carrying the first multi-carrier signal M subcarrier is selected to determine transmission range.Such as can be according to default selection strategy from for carrying first Select M subcarrier in the subcarrier of multi-carrier signal, default selection strategy can have it is a variety of, such as can To select the M subcarrier at a distance of predetermined interval, or M subcarrier of bandwidth identical can be selected, Either can also be selected or can also randomly choosed according to the regulation of agreement or standard, etc., this Inventive embodiments are not restricted for default selection strategy.
In one embodiment, the original phase of M subcarrier is poor, can be the first receiving device voluntarily Calculate.For example, the first multi-carrier signal is known signal for the first receiving device, such as first Multi-carrier signal is pilot signal, or is targeting signal etc., then the first receiving device can is voluntarily counted It is poor to calculate the original phase of M subcarrier of the first multi-carrier signal of carrying, such as, the first receiving device can It is poor so as to calculate the original phase of M subcarrier using the transmission range of the first multi-carrier signal of simulation as 0. That is, the first multi-carrier signal is if signal known to the first receiving device, then the first receiving device can be with It is poor voluntarily to calculate original phase, without sending the participation of equipment, reduces the interaction between equipment.
In another embodiment, the original phase of M subcarrier is poor or transmission equipment is being sent out Send and calculated before the first multi-carrier signal, and the result being calculated is sent to the first receiving device. For example, the first multi-carrier signal is unknown signal for the first receiving device, then can is by sending out The original phase for sending equipment to calculate subcarrier after the first multi-carrier signal to be carried out to multi-carrier modulation is poor, and will The multiple original phase differences being calculated are sent to the first receiving device.Pass through both the above embodiment, nothing It is known signal or unknown signaling for the first receiving device by the first multi-carrier signal, first receives The original phase that equipment can obtain M subcarrier is poor, and application is relatively broad.
Wherein, original phase difference can by the first multi-carrier signal calculate after multi-carrier modulation Phase difference between the subcarrier arrived, actual phase difference can be that the first multi-carrier signal is being carried out into multicarrier The phase difference between the subcarrier being calculated afterwards is demodulated, if for example, the first multi-carrier signal is OFDM Signal, then multi-carrier modulation can refer to OFDM modulate, multicarrier demodulation can refer to OFDM demodulation.
Optionally, the first receiving device will calculate the actual phase difference of M subcarrier, then first relate to It will participate in calculating the son of actual phase difference to the phase of M subcarrier to be extracted, such as the embodiment of the present invention Carrier wave is referred to as actual sub-carriers, likewise, either the first receiving device still sends equipment, to calculate M The original phase of individual subcarrier is poor, then first relates to the phase of M subcarrier to be extracted, such as this The subcarrier for participating in calculating original phase difference is referred to as original subcarrier by inventive embodiments.Optionally, extracted The phase of original subcarrier and the phase of actual sub-carriers can correspond, could so obtain difference.
It should be noted that actual sub-carriers and original subcarrier are the son load for carrying the first multi-carrier signal Ripple for same subcarrier, the first multi-carrier signal is being adjusted by multicarrier in the title of different times After system is carried on the subcarrier, the subcarrier is referred to as original subcarrier, in carry the subcarrier the After one multi-carrier signal carries out multicarrier demodulation, the subcarrier is referred to as actual sub-carriers.
Optionally, the quantity for carrying the subcarrier of the first multi-carrier signal is M, to calculate M subcarrier Actual phase difference exemplified by, each actual phase difference is the difference of the phase of two subcarriers, then to be calculated Any actual phase difference, involve how to be matched M subcarrier, i.e., by the phase of two subcarriers To try to achieve an actual phase difference, such as, at least one subcarrier spacing number, subcarrier spacing can be set Several units is, for example, subcarrier, for example subcarrier spacing number is 1, then meaning that will be by a distance of one Two subcarriers of subcarrier try to achieve actual phase difference, can pass through in M subcarrier at a distance of setting Two subcarriers of subcarrier spacing number calculate actual phase difference, or, it can also specify, for example specify An actual phase difference, or both sides are calculated in M subcarrier by any two subcarriers respectively Formula can also be used in combination, for example pre-set subcarrier spacing number, can also specify by M son How carrier wave uses subcarrier spacing number, etc..So, how on earth M subcarrier is matched Seek actual phase difference, can be determined by transmission equipment, if for example, send equipment be responsible for calculate original phase it is poor, The multiple original phase differences being calculated can be sent to the first receiving device after a computation, then first Receiving device have received which original phase is poor, and also can correspondingly calculates corresponding actual phase difference, or Person can also be provided that so sending equipment and the first receiving device can know in advance in advance by agreement, or Person can also be good by transmission equipment and the first receiving device offered.It is also class for original phase difference As, seldom repeat.Certainly, the original phase difference and actual phase difference being calculated can correspond, So could be again by matching two-by-two come calculating difference.How the application is to calculate actual phase difference and original phase Potential difference does not limit.
In order to make it easy to understand, introduce how the first receiving device is calculated M below by several examples Multiple phase fluctuation values of individual subcarrier.It is noted that following examples are served only for illustrating what the application recorded Method, and the realization of the application method is not limited to following examples.
Example 1.In example 1, the first multi-carrier signal is unknown signaling for the first receiving device, by sending out Equipment is sent to extract the phase of original subcarrier, wherein the phase and which reality of which original subcarrier should be extracted The phase of border subcarrier can be provided by agreement.And reality is calculated by way of subcarrier spacing number is set Border phase difference and original phase are poor.
One string sequence is modulated on K subcarrier by multi-carrier modulation for example, sending equipment, with The first multi-carrier signal is obtained, K subcarrier is, for example, 0~subcarrier of subcarrier 63.Send equipment according to The regulation of agreement therefrom extracts the phase of subcarrier 3, the phase of subcarrier 4, the phase of subcarrier 5, son The phase of the phase of carrier wave 32, the phase of subcarrier 33 and subcarrier 34, i.e., now M=6.Such as set The subcarrier spacing number put includes 29,29,29, then sending equipment can be from first original son of extraction Carrier wave, i.e. subcarrier 3 start, and two original subcarriers are obtained respectively according to this 3 subcarrier spacing numbers Phase difference, i.e. send equipment can calculate subcarrier 3 and subcarrier 32 original phase it is poor, calculate it is sub The original phase of carrier wave 4 and subcarrier 33 is poor and the original phase of calculating subcarrier 5 and subcarrier 34 is poor. Such as this 3 original phase differences being calculated can be sent to the first receiving device by transmission equipment.Or Equipment is sent after the phase of this 6 original subcarriers is extracted, can be directly by this 6 original subcarriers Phase be sent to the first receiving device, obtained by the first receiving device according to the subcarrier spacing number of setting This 3 original phases are poor.Wherein, send equipment and send the first multi-carrier signal to the first receiving device, and Send equipment and the original phase difference being calculated or the original sub- load for sending extraction are sent to the first receiving device The phase of ripple, the execution sequence of the two processes can be any.
Send equipment and the first multi-carrier signal is sent to the first receiving device, the first receiving device receives first , can be according to the regulation of agreement, from subcarrier 0~sub- load of the first multi-carrier signal of carrying after multi-carrier signal The phase of subcarrier 3, the phase of subcarrier 4, the phase of subcarrier 5, subcarrier 32 are extracted in ripple 63 Phase, the phase of the phase of subcarrier 33 and subcarrier 34.First receiving device is it is also known that the son set Carrier wave space-number includes 29,29,29, then the first receiving device can carry from first actual son of extraction Ripple, i.e. subcarrier 3 start, and obtain the phase of two actual sub-carriers respectively according to this 3 subcarrier spacing numbers Potential difference, i.e. receiving device can calculate the actual phase difference of subcarrier 3 and subcarrier 32, calculate son load The actual phase difference and the actual phase difference of calculating subcarrier 5 and subcarrier 34 of ripple 4 and subcarrier 33.
First receiving device after 3 actual phase differences and 3 original phase differences are obtained, can calculate this 3 The difference of individual actual phase difference and 3 original phase differences, that is, the phase fluctuation value of M subcarrier is calculated, 3 phase fluctuation values can be obtained.Optionally, the actual phase difference and original phase that the first receiving device obtains Potential difference can correspond, so just compared with for ease of calculating phase fluctuation value.For example, the first receiving device meter Obtained actual phase difference includes the phase difference and subcarrier 4 and subcarrier 5 of subcarrier 3 and subcarrier 4 Phase difference, then the first receiving device obtain original phase difference can include subcarrier 3 and subcarrier 4 Phase difference and the phase difference of subcarrier 4 and subcarrier 5, so when calculating phase fluctuation value, can obtain Phase difference and the subcarrier 3 in original phase difference of subcarrier 3 in actual phase difference and subcarrier 4 and Difference between the phase difference of subcarrier 4, i.e. phase fluctuation value, and obtain the subcarrier in actual phase difference 4 and subcarrier 5 phase difference and original phase difference in subcarrier 4 and subcarrier 5 phase difference between Difference, i.e. phase fluctuation value.
Example 2.In example 2, the first multi-carrier signal is unknown signaling for the first receiving device, by sending out Equipment is sent to extract the phase of original subcarrier, wherein the phase and which reality of which original subcarrier should be extracted The phase of border subcarrier can be by sending equipment and the first receiving device offered.And by setting son to carry The mode of wave spacing number is poor to calculate actual phase difference and original phase.
One string sequence is modulated on K subcarrier by multi-carrier modulation for example, sending equipment, with The first multi-carrier signal is obtained, the K subcarrier for carrying the first multi-carrier signal is, for example, subcarrier 0~subcarrier 63.Send equipment and the first receiving device offered has got well the phase that therefrom extract subcarrier 3 Position, the phase of subcarrier 6, the phase of subcarrier 9, the phase of subcarrier 12, the phase of subcarrier 15 With the phase of subcarrier 18, i.e. M=6, then send equipment and therefrom extract the phase of subcarrier 3, subcarrier 6 phase, the phase of subcarrier 9, the phase of subcarrier 12, the phase of subcarrier 15 and subcarrier 18 Phase, send equipment the phase of the original subcarrier of extraction can be all sent to the first receiving device.
Such as 5 subcarrier spacing numbers are pre-set, respectively 3,3,3,3,3, then first connects Receiving unit can be from first original subcarrier for sending equipment extraction, i.e. subcarrier 3 start, according to this 5 Individual subcarrier spacing number calculates the phase difference of two original subcarriers respectively, that is, it is poor to obtain original phase, i.e. Original phase that first receiving device can calculate subcarrier 3 and subcarrier 6 is poor, subcarrier 6 and subcarrier 9 original phase is poor, the original phase of subcarrier 9 and subcarrier 12 is poor, subcarrier 12 and subcarrier 15 Original phase it is poor and the original phase of subcarrier 15 and subcarrier 18 is poor.
Send equipment and the first multi-carrier signal is sent to the first receiving device, the first receiving device receives first , can be according to the negotiation prior with sending equipment, from the son of the first multi-carrier signal of carrying after multi-carrier signal In 0~subcarrier of carrier wave 63 extract the phase of subcarrier 3, the phase of subcarrier 6, the phase of subcarrier 9, The phase of the phase of subcarrier 12, the phase of subcarrier 15 and subcarrier 18.First receiving device is also Know and pre-set 5 subcarrier spacing numbers, respectively 3,3,3,3,3, then receiving device can be with From first actual sub-carriers of extraction, i.e. subcarrier 3 starts, according to this 5 subcarrier spacing number difference The phase difference of two actual sub-carriers is calculated, that is, calculates actual phase difference, i.e. the first receiving device can obtain The actual phase difference of subcarrier 3 and subcarrier 6, obtain subcarrier 6 and subcarrier 9 actual phase difference, Obtain the actual phase difference of subcarrier 9 and subcarrier 12, obtain the reality of subcarrier 12 and subcarrier 15 Phase difference and the actual phase difference for obtaining subcarrier 15 and subcarrier 18.
First receiving device can calculate original after 5 actual phase differences and 5 original phase differences are obtained The difference of phase difference and actual phase difference, that is, calculate the phase fluctuation value of M subcarrier.Optionally, The actual phase difference and original phase difference that one receiving device obtains can correspond, so just compared with for ease of meter Calculate phase fluctuation value.
Example 3.In example 3, the first multi-carrier signal is known signal for the first receiving device, by One receiving device equipment extracts the phase of original subcarrier, wherein the phase of which original subcarrier should be extracted Phase with which actual sub-carriers can be by sending equipment and the first receiving device offered.And pass through Set the mode of subcarrier spacing number poor to calculate actual phase difference and original phase.
For example, equipment is sent by multi-carrier modulation by a string of sequence modulations to K subcarrier, with The first multi-carrier signal is obtained, the K subcarrier for carrying the first multi-carrier signal is, for example, subcarrier 0~subcarrier 63.
Send equipment and the first multi-carrier signal is sent to the first receiving device, the first receiving device receives first After multi-carrier signal, M can be extracted from K subcarrier according to the negotiation prior with sending equipment The phase of subcarrier, for example, send that equipment and the first receiving device offered got well will be from K subcarrier Extract the phase of subcarrier 3, the phase of subcarrier 6, the phase of subcarrier 9, the phase of subcarrier 12, The phase of subcarrier 15 and the phase of subcarrier 18, i.e. M=6, then the first receiving device from carrying more than first The phase of subcarrier 3, the phase of subcarrier 6, son are extracted in 0~subcarrier of subcarrier 63 of carrier signal The phase of carrier wave 9, the phase of subcarrier 12, the phase of the phase of subcarrier 15 and subcarrier 18.Example Such as pre-set 5 subcarrier spacing numbers, respectively 3,6,9,12,15, then first receives and set It is standby to start from first actual sub-carriers of extraction, i.e. subcarrier 3, according to this 5 subcarrier spacings Number calculates the phase difference of two actual sub-carriers respectively, i.e. the first receiving device can calculate the He of subcarrier 3 The actual phase difference of subcarrier 6, the actual phase difference of subcarrier 3 and subcarrier 9, subcarrier 3 and son carry The actual phase difference of ripple 12, the actual phase difference of subcarrier 3 and subcarrier 15 and subcarrier 3 and son carry The actual phase difference of ripple 18.
Such as first multi-carrier signal be known signal for the first receiving device, such as the first multicarrier Signal is pilot signal or targeting signal, then the first receiving device can voluntarily calculate M subcarrier Original phase is poor, is calculated without sending equipment.Wherein, it is poor and real to calculate original phase for the first receiving device Border phase difference, the execution sequence of the two processes can be any.First receiving device is by the first multi-carrier signal Transmission range be modeled as 0, that is, remove the influence of distance, do not passed also equivalent to the first multi-carrier signal so It is defeated, therefore what is calculated is exactly that original phase is poor.First receiving device according to sending the prior negotiation of equipment, From M subcarrier extract the phase of subcarrier 3, the phase of subcarrier 6, the phase of subcarrier 9, The phase of the phase of subcarrier 12, the phase of subcarrier 15 and subcarrier 18.Such as pre-set 5 Individual subcarrier spacing number, respectively 3,6,9,12,15, then the first receiving device can be from extraction First original subcarrier, i.e. subcarrier 3 start, and two are obtained respectively according to this 5 subcarrier spacing numbers The phase difference of original subcarrier, i.e. the first receiving device can calculate the original of subcarrier 3 and subcarrier 6 The original phase of phase difference, subcarrier 3 and subcarrier 9 is poor, the original phase of subcarrier 3 and subcarrier 12 The original phase of potential difference, subcarrier 3 and subcarrier 15 is poor and the original phase of subcarrier 3 and subcarrier 18 Potential difference.
First receiving device can calculate after 5 actual phase differences and 5 original phase differences are calculated The difference of this 5 actual phase differences and 5 original phase differences, that is, calculate the phase fluctuation of M subcarrier Value.Optionally, the actual phase difference and original phase difference that the first receiving device obtains can correspond, this Sample is just compared with for ease of calculating phase fluctuation value.
Certainly, the mode of several calculating phase fluctuation values of the above is example, is not limited in actual applications This.
Optionally, after multiple phase fluctuation values are calculated, being averaged for multiple phase fluctuation values is also calculated Value, that is, calculate phase fluctuation average value.When calculating phase fluctuation average value, if being wherein used to obtain often The spacing of two subcarriers of individual phase fluctuation value is all equal, then phase fluctuation average value can be directly obtained, Such as refer to such as preceding example 1 and example 2, and if two sons for being wherein used to obtain each phase fluctuation value carry The spacing of ripple may be unequal, then can have corresponding method when obtaining phase fluctuation average value, before such as Example 3 exemplified by.The phase fluctuation value that example 3 is calculated corresponds respectively to subcarrier 3 and subcarrier 6, subcarrier 3 and subcarrier 9, subcarrier 3 and subcarrier 12, subcarrier 3 and subcarrier 15 and subcarrier 3 and subcarrier 18, it is seen then that the interval between subcarrier corresponding to each phase fluctuation value is different, such as subcarrier 3 With subcarrier 6 corresponding to phase fluctuation value be expressed as △ W1, phase fluctuation corresponding to subcarrier 3 and subcarrier 9 Value is expressed as △ W2, and phase fluctuation value corresponding to subcarrier 3 and subcarrier 12 is expressed as △ W3, subcarrier 3 With subcarrier 15 corresponding to phase fluctuation value be expressed as △ W4, phase ripple corresponding to subcarrier 3 and subcarrier 18 Dynamic value is expressed as △ W5, because the interval of subcarrier corresponding to △ W1~△ W5 is different, it is possible to by △ W1~△ W5 conversions are phase fluctuation value corresponding to identical subcarrier spacing number, for example, corresponding to △ W1 Subcarrier spacing number is 3, then the sub-carrier phase difference obtained after being converted to △ W1 is expressed as △ W1 ', △ W1 '=subcarrier spacing number corresponding to △ W1, △ W2 is 6, then the subcarrier obtained after being converted to △ W2 Phase meter is shown as △ W2 ', △ W2 '=△ W2/2, can similarly obtain △ W3 '=△ W3/3, △ W4 '=△ W4/3, △ W5 '=△ W5/3, then obtain △ W1 '~△ W5 ' average value.
Optionally, it is determined that, it is necessary to use between phase fluctuation average value and transmission range during transmission range Mapping relations, therefore the mapping relations between phase fluctuation average value and transmission range can be preset, if Phase bit fluctuates the mapping relations between average value and transmission range, and the process can be completed by arbitrary equipment, Such as can be completed by transmission equipment, either can by the first receiving device complete or can also be by the 3rd Method, apparatus is completed, such as special test equipment etc., as long as the first receiving device can obtain phase fluctuation and put down Mapping relations between average and transmission range.On how to set phase fluctuation average value and transmission distance Mapping relations between, it will be introduced in the content below.
Optionally, the mapping relations between phase fluctuation average value and transmission range can have a variety of, such as root According to the process of such as preceding calculating phase fluctuation value introduced, in subcarrier spacing number difference, phase fluctuation is average There can be different mapping relations between value and transmission range, or in two for one phase difference of acquisition During subcarrier difference, there can be different mapping relations between phase fluctuation average value and transmission range, or During M quantity difference, there can be different mapping relations between phase fluctuation average value and transmission range, or If the difference on the frequency between the adjacent subcarrier of person is different, or channel condition difference etc., may all cause to reflect It is different, etc. to penetrate relation.Therefore, when presetting mapping relations, at least one can be preset Kind mapping relations, if for example, only setting a kind of mapping relations, then the first receiving device need to be known in advance Mapping relations it is less, save the first receiving device memory space, also cause whole process it is relatively simple, If a variety of mapping relations are set, then can be selected not as needed during transmission range is obtained Same mapping relations, mode are more flexible.
Optionally, the mode of the mapping relations between phase fluctuation average value and transmission range, a part are generated Refer to such as the mode of preceding calculating phase fluctuation value, i.e. the calculating phase fluctuation value that can be introduced before such as Mode on the basis of, multiple phase fluctuation average values are calculated under multiple different transmission ranges, its In the corresponding phase fluctuation average value of each transmission range, so as to according to multiple transmission ranges and multiple Phase fluctuation average value generates mapping relations, for example, can be according to multiple phase fluctuation average values and multiple Transmission range carries out curve fitting, so as to obtain the mapping relations between phase fluctuation average value and transmission range.
Optionally, either as which kind of mapping between the preceding phase fluctuation average value introduced and transmission range is closed System, can generate, such as can be generated by emulation mode, this generation in different ways Mode is relatively simple, can be achieved by software, then the process for generating mapping relations can be by any one Equipment performs, such as can be passed through by transmission equipment or third party device and emulate generation mapping relations, sends The mapping relations of generation can be sent to the first reception by equipment or third party device after mapping relations are generated Equipment, so as to which the first receiving device can determine transmission range by mapping relations, or can also be by first Receiving device to generate mapping relations by emulating, and saves the process of transmission map relation, saves transmission money Source.Such as mapping relations can also be generated by testing on the spot, you can with by the way that hair is varied multiple times The mode of the actual range between equipment and the first receiving device is sent to generate mapping relations, in this case, First receiving device can receive the second multi-carrier signal of test equipment transmission, to generate mapping relations, survey Examination equipment such as can be foregoing transmission equipment, or can also be third party device, by this The corresponding relation that mode generates, which compares, can reflect actual conditions, can more meet practical application.For ease of understanding, The possible mode that mapping relations are generated by emulating is described below, such as simulation process is received by first Equipment is completed.
First receiving device can be modulated a string of known array L (x) by multi-carrier modulation by emulation Onto M OFDM subcarrier, the second multi-carrier signal is obtained, the second multi-carrier signal is by known sequence Row are modulated to the ofdm signal obtained on OFDM subcarriers after passing through multi-carrier modulation, wherein, if such as The mapping relations are mapping relations corresponding to the first multi-carrier signal, then the second multi-carrier signal and the first overloading Ripple signal can be identical multi-carrier signal.Two multi-carrier signals are identical, can include two multicarriers The quantity of the subcarrier of signal is identical, the information of two multi-carrier signals carryings is identical and carrying is more than two The bandwidth of the subcarrier of carrier signal is identical.
First receiving device extracts the phase of the original subcarrier of the second multi-carrier signal, such as the original by extraction Beginning subcarrier is expressed as subcarrier x, and the phase of the original subcarrier of extraction is for example expressed as Pi (x), wherein X=1 ..., W, W are the sum for carrying the subcarrier of the second multi-carrier signal, if such as the mapping Relation is mapping relations corresponding to the first multi-carrier signal, then if W>M, it should be selected from W subcarrier M subcarrier is selected, if W=M, just using W subcarrier as M subcarrier.Such as pre-set At least one subcarrier spacing number, at least one subcarrier spacing numerical example are such as Nb, and Nb, interval is former The original phase difference of two subcarriers of beginning subcarrier is expressed as Q (x), wherein Q (x)=Pi (x+Nb)-Pi (x). Such as first receiving device can simulate by multiple transmission ranges to send the second multi-carrier signal respectively, that It is poor that multiple original phases can be obtained under each transmission range.Optionally, the second multi-carrier signal example It such as can be common ofdm signal, can be either pilot signal or can also be targeting signal, Etc., the embodiment of the present invention is not restricted.
First receiving device receives second multicarrier letter by analogue simulation respectively under multiple transmission ranges Number, wherein under each transmission range, the first receiving device is by analogue simulation from for carrying the second overloading The phase of M subcarrier is extracted in W subcarrier of ripple signal, such as the subcarrier of extraction is referred to as actual son Carrier wave, actual sub-carriers are equally expressed as subcarrier x, and under each transmission range, the first receiving device can To obtain the phase difference of the actual sub-carriers of Nb, interval subcarrier, such as can be obtained under each transmission range To multiple actual phase differences, transmission range here, refer between the first receiving device and transmission equipment Distance.Such as actual phase difference is expressed as Qi (x), under each transmission range, receiving device can calculate The difference of actual phase difference and original phase difference, that is, calculate phase fluctuation value, such as phase fluctuation value is represented For Δ Qi, wherein Δ Qi=Qi (x)-Q (x), then multiple Δ Qi can be obtained according to each transmission range.The One receiving device according to multiple Δ Qi, and multiple transmission ranges, by emulation can obtain transmission range with Performance curve between Δ Qi, such as can obtain the transmission for each transmission range, the first receiving device Multiple Δ Qi average value corresponding to distance, such as the average value is referred to as phase fluctuation average value, it can obtain Multiple phase fluctuation average values are obtained, the first receiving device is according to multiple phase fluctuation average values and multiple biographies afterwards Defeated distance, the performance curve between transmission range and phase fluctuation average value can be obtained by emulation, such as Fig. 3 is referred to, the example of the performance curve between a kind of transmission range and phase fluctuation average value, in Fig. 3 Transverse axis represents transmission range, and the longitudinal axis represents phase fluctuation average value, such as two subcarriers adjacent in Fig. 3 Between difference on the frequency be 31.25khz, 256 subcarriers altogether, channel condition is defined in 802.11n standards Mode B (ModeB) channel.Wherein it is experimentally confirmed, Nb=200 subcarrier phase position curve meeting Smoother, slope is bigger, it is meant that resolution ratio is bigger, and Fig. 3 is by taking Nb=200 as an example.Obtaining performance After curve, such as a kind of possible performance curve is Fig. 3, then the first receiving device can be intended by curve Conjunction obtains the mapping relations between phase fluctuation average value and transmission range, such as when Nb is 200 subcarriers Mapping relations between phase fluctuation average value and transmission range are linear relationship, such as the linear relationship is as follows：
P=80+ (230-80)/20*R (1)
In formula (1), P represents phase fluctuation average value, and R represents transmission range.In formula (1) is Number is all obtained by curve matching, and formula naturally also just has if by emulating obtained curve difference Institute is different.
The mode of acquisition mapping relations above is example, in actual applications not limited to this.
Optionally, as before having been described above, mapping relations can have a variety of, be reflected according to known to introduction above It is associated that relation, which is penetrated, with phase difference extraction strategy, then it is corresponding, a variety of phases can also be pre-set Difference extraction strategy, such as a phase difference extraction strategy can correspond to one or more mapping relations, such as one Individual mapping relations can correspond to one or more phase difference extraction strategies.In addition, different multi-carrier signals can With corresponding different phase difference extraction strategy and mapping relations, it is therefore contemplated that multi-carrier signal and phase Difference extraction strategy and mapping relations are also all related.Such as first receiving device receive the first multicarrier letter After number, if the first receiving device has prestored multiple default phase difference extraction strategies, then first connects Receiving unit can therefrom select phase difference extraction strategy corresponding with the first multi-carrier signal, accordingly, first If receiving device stores multiple mapping relations, then can also therefrom select and the first multi-carrier signal pair The mapping relations answered.
Optionally, in addition to it can obtain the transmission range between the first receiving device and transmission equipment, also It can be positioned using transmission range to sending equipment, such as can be by reaching time-difference (Time Difference of Arrival, TDOA) mode come to send equipment position.TDOA technologies be Develop what is come on the basis of arrival time (Time Of Arrival, TOA), by TDOA technologies, according to letter Number source to multiple monitoring stations time difference, with regard to signal source can be obtained to the range difference of multiple monitoring stations, and directly Monitoring station can be obtained to the transmission range between signal source by distance measuring method provided in an embodiment of the present invention, Carry out ranging without using the time difference, also need not just require that each monitoring station must be synchronous, so to synchronous fixed When error requirements reduce, the requirement to network is relatively low, so as to reach higher positioning precision. In the embodiment of the present invention, monitoring station and receiving device can be identical concepts, and signal source can be with sending equipment It is identical concept.
TDOA thought is used for reference, the phase fluctuation average value between multiple receiving devices can be combined to obtain The range difference of multiple receiving devices between any two, so as to aid in positioning to sending equipment.So may be used To obtain the increased benefits of TOA to TDOA, requirement of the network to synchronization timing is reduced, phase can also be simplified Linear relationship between potential difference and transmission range.
Such as three receiving devices, respectively the first receiving device, the second receiving device and the 3rd can be included Receiving device, the first receiving device can be foregoing first receiving devices.In order to describe in more detail, Exemplified by being access point (Access Point, AP) below with receiving device, the type of certain receiving device is not It is limited to this.So such as the first receiving device is AP1, the second receiving device is AP2, the 3rd receiving device The first multi-carrier signal is sent to AP1, AP2 and AP3 for AP3, such as transmission equipment, sending equipment need not Send simultaneously, AP1, AP2 and AP3 are without receiving simultaneously.AP1, AP2 and AP3 can be according to such as The mode of preceding introduction calculates phase fluctuation average value.Such as the phase fluctuation average value that AP1 is calculated Referred to as first phase fluctuation average value, such as K1 is expressed as, the phase fluctuation average value that AP2 is calculated Referred to as second phase fluctuation average value, such as K2 is expressed as, it is that the phase fluctuation being calculated is averaged by AP3 Value is referred to as third phase fluctuation average value, such as is expressed as K3.Optionally, positioned to sending equipment Process can be completed by the equipment of any one in AP1, AP2 and AP3, for example, with AP1 come complete to hair Exemplified by sending the positioning of equipment.So AP1 can ask to obtain K2 to AP2, and can ask to obtain to AP3 K2 actively can also be sent to AP1 by K3, or AP2, and K3 actively can also be sent to AP1 by AP3. The mapping relations that AP1 can be fluctuated between average value and transmission range according to K1 and phase difference determine to send Equipment arrives the distance between AP1, and the mapping between average value and transmission range is fluctuated according to K2 and phase difference Relation determines to send equipment the distance between to AP2, according to K3 and phase difference fluctuation average value and transmission distance Mapping relations between determine to send equipment the distance between to AP3, then calculate transmission equipment to AP1 it Between distance and send equipment to the distance between AP2 distance difference, such as the distance difference is expressed as Δ D12, and calculate and send equipment to the distance between AP1 and transmission equipment to the distance between AP3 distance Difference, such as the distance difference is expressed as Δ D13, so as to according to Δ D12 and Δ D13, it is possible to obtain Send the position of equipment.
Or AP1 can obtain difference and K1 between K1 and K2 respectively after K1, K2 and K3 is obtained Difference between K3, such as the difference between K1 and K2 is expressed as Δ K12, by between K1 and K3 Difference is expressed as Δ K13, then AP1 can be fluctuated according to Δ K12 and phase difference average value and transmission range it Between mapping relations determine to send equipment to AP1 distance and transmission equipment to the distance between AP2 difference, Such as the distance difference is expressed as Δ D12, and can be fluctuated according to Δ K13 and phase difference average value and Mapping relations between transmission range determine to send equipment to AP1 distance and send equipment between AP3 Distance difference, such as the distance difference is expressed as Δ D13, then, the first receiving device can be according to Δ D12 and Δ D13 calculates to obtain the position sent where equipment, so as to realize the positioning to sending equipment.
Device provided in an embodiment of the present invention is introduced below in conjunction with the accompanying drawings.
Fig. 4 is referred to, based on same inventive concept, there is provided a kind of equipment of measurement distance, the equipment is for example Can be foregoing first receiving device, the equipment can include memory 401, processor 402 and connect Receive device 403.
The method that the embodiments of the present invention disclose can apply in processor 402, or by processor 402 Realize.
Processor 402 is probably a kind of IC chip, has the disposal ability of signal.In implementation process In, each step of the above method can pass through the integrated logic circuit or software of the hardware in processor 402 The instruction of form is completed.Above-mentioned processor 402 can be general processor, digital signal processor (Digital Signal Processing, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field Programmable Gate Array, FPGA) or other PLD, discrete gate or transistor logic, discrete hardware components etc..Can realize or Person performs disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be The general processors such as microprocessor, single-chip microcomputer can also be any conventional processor etc..With reference to of the invention real The step of applying the method disclosed in example can be embodied directly in hardware decoding processor and perform completion, or with translating Hardware and software module combination in code processor perform completion.
Software module can be located at random access memory, flash memory, read-only storage, programmable read only memory or In the ripe storage medium in this areas such as person's electrically erasable programmable memory, register.The storage medium position In memory 401, processor 402 reads the information in memory 401, and the above method is completed with reference to its hardware The step of.
Receiver 403 may belong to radio system, for carrying out network service with external equipment, such as can be with Communicated by networks such as Ethernet, wireless access network, WLANs with external equipment.
Memory 401 and receiver 403 can be connected by bus 400 with processor 402 (Fig. 4 with Exemplified by this), or can also be connected by special connecting line with processor 402.
The equipment of the measurement distance can be used for performing the method described in above-mentioned Fig. 2, such as can be such as preceding institute The first receiving device stated.Therefore, function of being realized for each unit in the equipment etc., refer to as The description of front method part, is seldom repeated.
Optionally, such as the equipment can be special test equipment, such as some testers etc., or The equipment can also be common terminal device, such as handheld device, either minicomputer or server etc., Or the equipment can also be the network equipment, such as base station, or can be remote sensing equipment near base station etc.. The equipment can be independent equipment, or can also be the functional module in other equipment, such as should Equipment can be realized by chip plus antenna, as long as the chip can realize the function of processor 402 and have Certain memory space, antenna can realize the function of receiver 403.In a word, the embodiment of the present invention It is not restricted for the form of the equipment, as long as an equipment can realize measurement provided in an embodiment of the present invention The method of distance, the equipment that the equipment can serve as the measurement distance in the embodiment of the present invention.
The equipment calculates the first multicarrier of carrying passing through without can in the case of synchronous with other equipment The phase fluctuation value of M subcarrier of signal measures the equipment with sending the distance between equipment, for this The synchronization of equipment is less demanding, therefore also just no so high for the performance requirement of the equipment, is more beneficial to Practical application, thereby increases and it is possible to because less high for the performance requirement of equipment, can also save to a certain extent The cost of equipment.
Fig. 5 is referred to, based on same inventive concept, there is provided the equipment of another measurement distance, the equipment can With including receiving module 501, analysis module 502, computing module 503 and determining module 504.Optionally, should Equipment can also include generation module 505.
Wherein, modules as introduced above are shown by Fig. 5, then obviously, simply this sets shown in Fig. 5 A kind of standby possible structured flowchart, such as the equipment can not also include generation module 505 etc..
In actual applications, entity device corresponding to receiving module 501 can be the receiver 403 in Fig. 4, Analysis module 502, computing module 503, determining module 504 and entity device corresponding to generation module 505 To be the processor 402 in Fig. 4.
The equipment of the measurement distance can be used for performing the method described in above-mentioned Fig. 2, such as can be such as preceding institute The first receiving device stated.Therefore, function of being realized for each unit in the equipment etc., refer to as The description of front method part, is seldom repeated.
Different from prior art using the time difference come ranging, the embodiments of the invention provide a kind of brand-new survey Away from mode.In embodiments of the present invention, receiving device will analyze the first overloading after receiving the first multi-carrier signal Ripple signal, multiple actual phase differences of M subcarrier are obtained, by actual phase difference and M subcarrier Original phase difference does difference to obtain phase fluctuation value, then by being averaging phase fluctuation value to obtain first The phase fluctuation average value of multi-carrier signal, so as to according to the phase fluctuation average value and transmission distance pre-set Mapping relations between are assured that the transmission range of the first multi-carrier signal, and the embodiment of the present invention determines The transmission range for carrying phase difference and the first multi-carrier signal between the subcarrier of the first multi-carrier signal has Close, therefore ranging can be completed by calculating the phase difference between the subcarrier for carrying the first multi-carrier signal, Without using the time difference, no matter how many receiving device, each can be provided according to the embodiment of the present invention Method complete ranging, each receiving device Self-operating, even if there is multiple receiving devices, without It is required that must be synchronous between receiving device, the synchronous of equipment is required than relatively low, it is clear that this distance measuring method is more Be advantageous to the application in actual scene.
, may be relevant with transmission range and the phase of subcarrier changes, it is also possible to the original with subcarrier Beginning phase is relevant, and it is poor to subtract original phase in the embodiment of the present invention with actual phase difference, by subtracting each other it Result afterwards determines transmission range, thus equivalent to eliminating original phase for the phase of subcarrier Influence, remaining part can consider to be influenceed substantially caused by transmission range, by remaining part come Transmission range is determined, can make it that the result determined is more accurate.
In the present invention, it should be understood that disclosed apparatus and method, can be real by another way It is existing.For example, device embodiment described above is only schematical, for example, the unit or unit Division, only a kind of division of logic function, can there is other dividing mode when actually realizing, such as Multiple units or component can combine or be desirably integrated into another system, or some features can be ignored, Or do not perform.Another, shown or discussed mutual coupling or direct-coupling or communication connection can The INDIRECT COUPLING or communication connection of device or unit, can be electrical or other to be by some interfaces Form.
The embodiment of the present invention also provides a kind of computer-readable storage medium, wherein, the computer-readable storage medium can be deposited Program is contained, the program includes the portion of any distance-finding method described in the above method embodiment when performing Point or Overall Steps.
Each functional unit in embodiments of the present invention can be integrated in a processing unit, or each list Member can also be independent physical module.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing Or in use, it can be stored in a computer read/write memory medium.Based on such understanding, this hair The all or part of bright technical scheme can be embodied in the form of software product, computer software production Product are stored in a storage medium, including some instructions are causing a computer equipment, such as can be with It is personal computer, server, or network equipment etc., or processor (processor) performs the present invention The all or part of step of each embodiment methods described.And foregoing storage medium includes：General serial is total Line flash disk (Universal Serial Bus flash drive), mobile hard disk, ROM, RAM, magnetic disc or Person's CD etc. is various can be with the medium of store program codes.
It is described above, above example only technical scheme to be described in detail, but with The explanation of upper embodiment is only intended to help the method for understanding the embodiment of the present invention, should not be construed as to the present invention The limitation of embodiment.The change or replacement that those skilled in the art can readily occur in, it should all cover Within the protection domain of the embodiment of the present invention.

Claims (15)

1. a kind of method of measurement distance, methods described is used for receiving device, it is characterised in that including：
Receive and send the first multi-carrier signal that equipment is sent；
First multi-carrier signal received is analyzed, so that M are obtained in first multi-carrier signal Multiple actual phase differences of subcarrier, the actual phase difference are two in the M subcarrier received Phase difference between subcarrier, wherein, M is the positive integer more than 2；
Multiple phase fluctuation values corresponding with the multiple actual phase difference are calculated, the phase fluctuation value is institute The actual phase difference of two subcarriers in M subcarrier and the difference of original phase difference are stated, it is described original Phase difference is before first multi-carrier signal is sent by the transmission equipment, in the M subcarrier Phase difference between two subcarriers；
The phase fluctuation average value of first multi-carrier signal is calculated, the phase fluctuation average value is described Multiple phase fluctuation values are averaging what is obtained；
The first multicarrier letter is determined according to the mapping relations of the phase fluctuation average value and transmission range Number transmission range, the transmission range of first multi-carrier signal sets for the transmission equipment and described receive Distance between standby.
2. the method as described in claim 1, it is characterised in that methods described also includes：
It is calculated according to multiple different transmission ranges and under the multiple different transmission range more Individual phase fluctuation average value, generates the mapping relations.
3. method as claimed in claim 2, it is characterised in that according to multiple different transmission ranges and The multiple phase fluctuation average values being calculated under the multiple different transmission range, generate the mapping Relation, including：
The multiple different transmission range is set,
According to the multiple different transmission range and multiple phases under the multiple different transmission range Position fluctuation average value, establishes the mapping relations；
Wherein,
Under each transmission range in the multiple different transmission range, the receiving device is by holding Row is following to be operated, and calculates multiple phase fluctuation average values under the multiple different transmission range：
The second multi-carrier signal that test equipment is sent is received, second multi-carrier signal includes the M Individual subcarrier；
Calculate multiple phase fluctuation values of the M subcarrier in second multi-carrier signal；
Calculate the phase fluctuation average value of second multi-carrier signal.
4. the method as described in claim 1-3 is any, it is characterised in that received described in the analysis First multi-carrier signal, to obtain multiple realities of M subcarrier in first multi-carrier signal Border phase difference, including：
The selection phase corresponding with first multi-carrier signal from default multiple phase difference extraction strategies Difference extraction strategy；
According to the phase difference extraction strategy corresponding with first multi-carrier signal, analysis described more than first Carrier signal, to obtain multiple actual phase differences of M subcarrier in first multi-carrier signal；
Accordingly, it is described according to the phase fluctuation average value and the mapping relations of transmission range and described The phase fluctuation average value of one multi-carrier signal, the transmission range of first multi-carrier signal is determined, including：
From the mapping relations of multiple phase fluctuation average values of storage and transmission range, selection with it is described Mapping relations corresponding to first multi-carrier signal；
According to the mapping relations corresponding with first multi-carrier signal, the first multicarrier letter is determined Number transmission range.
5. the method as described in claim 1-4 is any, it is characterised in that first multi-carrier signal For pilot signal or targeting signal.
A kind of 6. equipment of measurement distance, it is characterised in that including：
Receiving module, for receiving the first multi-carrier signal for sending equipment and sending；
Analysis module, for analyzing first multi-carrier signal received, to obtain described first Multiple actual phase differences of M subcarrier in multi-carrier signal, the actual phase difference are the M received The phase difference between two subcarriers in individual subcarrier, wherein, M is the positive integer more than 2；
Computing module, it is described for calculating multiple phase fluctuation values corresponding with the multiple actual phase difference Phase fluctuation value is the actual phase difference and original phase difference of two subcarriers in the M subcarrier Difference；Before the original phase difference is sent for first multi-carrier signal by the transmission equipment, the M The phase difference between two subcarriers in individual subcarrier；
The computing module is additionally operable to calculate the phase fluctuation average value of first multi-carrier signal, the phase Position fluctuation average value is that the multiple phase fluctuation value is averaging to obtain；
Determining module, described in being determined according to the mapping relations of the phase fluctuation average value and transmission range The transmission range of first multi-carrier signal, the transmission range of first multi-carrier signal is the transmission equipment With the distance between the receiving device.
7. equipment as claimed in claim 6, it is characterised in that the equipment also includes generation module, For：
It is calculated according to multiple different transmission ranges and under the multiple different transmission range more Individual phase fluctuation average value, generates the mapping relations.
8. equipment as claimed in claim 7, it is characterised in that according to multiple different transmission ranges With multiple phase fluctuation average values are calculated under the multiple different transmission range, generate the mapping The aspect of relation, the generation module are used for：
The multiple different transmission range is set,
According to the multiple different transmission range and multiple phases under the multiple different transmission range Position fluctuation average value, establishes the mapping relations；
Wherein,
Under each transmission range in the multiple different transmission range, the generation module is by holding Row is following to be operated, and calculates multiple phase fluctuation average values under the multiple different transmission range：
The second multi-carrier signal of test equipment transmission, second multicarrier are received by the receiving module Signal includes the M subcarrier；
Calculate multiple phase fluctuation values of the M subcarrier in second multi-carrier signal；
Calculate the phase fluctuation average value of second multi-carrier signal.
9. the equipment as described in claim 6-8 is any, it is characterised in that in the analysis reception First multi-carrier signal arrived, to obtain in first multi-carrier signal the multiple of M subcarrier The aspect of actual phase difference,
The analysis module is used for：
The selection phase corresponding with first multi-carrier signal from default multiple phase difference extraction strategies Difference extraction strategy；
According to the phase difference extraction strategy corresponding with first multi-carrier signal, analysis described more than first Carrier signal, to obtain multiple actual phase differences of M subcarrier in first multi-carrier signal；
Accordingly, in mapping relations according to the phase fluctuation average value and transmission range and described The phase fluctuation average value of first multi-carrier signal, determine the side of the transmission range of first multi-carrier signal Face, the determining module are used for:
From the mapping relations of multiple phase fluctuation average values of storage and transmission range, selection with it is described Mapping relations corresponding to first multi-carrier signal；
According to the mapping relations corresponding with first multi-carrier signal, the first multicarrier letter is determined Number transmission range.
10. the equipment as described in claim 6-9 is any, it is characterised in that first multi-carrier signal For pilot signal or targeting signal.
A kind of 11. equipment of measurement distance, it is characterised in that including processor, memory, receiver and Bus, wherein, the memory is connected with the processor by the bus；The memory is used to deposit Computer instruction is put, the processor is used for the computer instruction for performing the memory storage；When the meter When calculating machine equipment operation, the processor runs computer instruction so that the computer equipment performs following Operation：
The first multi-carrier signal for sending equipment by calling the receiver to receive and sending；
First multi-carrier signal received by the receiver is analyzed, to obtain first overloading Multiple actual phase differences of M subcarrier in ripple signal, the actual phase difference are the M son received The phase difference between two subcarriers in carrier wave, wherein, M is the positive integer more than 2；
Multiple phase fluctuation values corresponding with the multiple actual phase difference are calculated, the phase fluctuation value is institute The actual phase difference of two subcarriers in M subcarrier and the difference of original phase difference are stated, it is described original Phase difference is before first multi-carrier signal is sent by the transmission equipment, in the M subcarrier Phase difference between two subcarriers；
The phase fluctuation average value of first multi-carrier signal is calculated, the phase fluctuation average value is described Multiple phase fluctuation values are averaging what is obtained；
The first multicarrier letter is determined according to the mapping relations of the phase fluctuation average value and transmission range Number transmission range, the transmission range of first multi-carrier signal sets for the transmission equipment and described receive Distance between standby.
12. equipment as claimed in claim 11, it is characterised in that when the computer equipment is run, The processor runs computer instruction, also causes the computer equipment to perform following operate：
It is calculated according to multiple different transmission ranges and under the multiple different transmission range more Individual phase fluctuation average value, generates the mapping relations.
13. equipment as claimed in claim 12, it is characterised in that according to multiple different transmission distances From with multiple phase fluctuation average values are calculated under the multiple different transmission range, reflected described in generation The aspect of relation is penetrated, the processor runs computer instruction so that the computer equipment performs following grasp Make：
The multiple different transmission range is set,
According to the multiple different transmission range and multiple phases under the multiple different transmission range Position fluctuation average value, establishes the mapping relations；
Wherein,
Under each transmission range in the multiple different transmission range, the processor passes through operation Computer instruction so that the computer equipment performs following operation, calculates in the multiple different transmission Multiple phase fluctuation average values under：
By calling the receiver to receive the second multi-carrier signal that test equipment is sent, second overloading Ripple signal includes the M subcarrier；
Calculate the M subcarrier in second multi-carrier signal received by the receiver Multiple phase fluctuation values；
Calculate the phase fluctuation average value of second multi-carrier signal received by the receiver.
14. the equipment as described in claim 11-13 is any, it is characterised in that connect described in the analysis First multi-carrier signal received, to obtain in first multi-carrier signal the more of M subcarrier The aspect of individual actual phase difference,
The processor runs computer instruction so that the computer equipment performs following operate：
The selection phase corresponding with first multi-carrier signal from default multiple phase difference extraction strategies Difference extraction strategy；
According to the phase difference extraction strategy corresponding with first multi-carrier signal, analysis described more than first Carrier signal, to obtain multiple actual phase differences of M subcarrier in first multi-carrier signal；
Accordingly, in mapping relations according to the phase fluctuation average value and transmission range and described The phase fluctuation average value of first multi-carrier signal, determine the side of the transmission range of first multi-carrier signal Face, the processor run computer instruction so that the computer equipment performs following operate：
From the mapping relations of multiple phase fluctuation average values of storage and transmission range, selection with it is described Mapping relations corresponding to first multi-carrier signal；
According to the mapping relations corresponding with first multi-carrier signal, the first multicarrier letter is determined Number transmission range.
15. the equipment as described in claim 11-14 is any, it is characterised in that the first multicarrier letter Number it is pilot signal or targeting signal.
CN201610319211.0A 2016-05-13 2016-05-13 Method and equipment for measuring distance Active CN107367723B (en)

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