CN113141651A

CN113141651A - Method, device, equipment and medium for acquiring first-arrival path position in UWB system

Info

Publication number: CN113141651A
Application number: CN202110699268.9A
Authority: CN
Inventors: 吴极; 陈文晓; 董宗宇
Original assignee: Hangzhou Youzhilian Technology Co ltd
Current assignee: Hangzhou Youzhilian Technology Co ltd
Priority date: 2021-06-23
Filing date: 2021-06-23
Publication date: 2021-07-20
Anticipated expiration: 2041-06-23
Also published as: CN113141651B

Abstract

The embodiment of the invention discloses a method, a device, equipment and a computer storage medium for acquiring a first reach path position in a UWB system, wherein the method comprises the following steps: acquiring a sampling window reference position according to correlation values of elements at corresponding positions in all pilot symbols in a first sub-domain in a pilot domain of a received signal; determining the sampling window according to the sampling window reference position and the window length of the sampling window; and acquiring a first path position according to the correlation values and the threshold of the elements of all the pilot symbols in the second subdomain in the pilot domain of the received signal at the corresponding positions in the sampling window.

Description

Method, device, equipment and medium for acquiring first-arrival path position in UWB system

Technical Field

The embodiment of the invention relates to the technical field of wireless communication, in particular to a method, a device, equipment and a computer storage medium for acquiring a first-arrival path position in a UWB system.

Background

At present, the pulse Ultra Wide Band (UWB) technology defined in the IEEE 802.15.4 protocol standard of the Institute of Electrical and Electronics Engineers (IEEE) is widely applied to application scenarios such as data transmission and positioning.

UWB is a wireless carrier communication technology, and since a transmitter of the UWB system transmits narrow pulses of non-sinusoidal waves in the order of nanoseconds and has an extremely low duty ratio, multipath signals received by a receiver are separable in time in the UWB system. Based on the non-overlapping characteristic of the pulse multipath signals in Time, each multipath component in the received signals can be separated through a Time Stamp (Time-Stamp), so that the first-arrival path is obtained, and the ranging is realized.

Generally, the time stamp is mainly obtained by using the pilot field of the UWB system, but the time stamp is obtained with low efficiency and there is a large waste in both memory area and power consumption.

Disclosure of Invention

In view of this, embodiments of the present invention provide a method, an apparatus, a device, and a computer storage medium for acquiring a first-arrival path position in a UWB system, which can acquire the first-arrival path position of a received signal according to an accumulation result of correlation values of elements at corresponding positions in the sampling window in each of all pilot symbols used for position calculation in a pilot domain of the received signal, thereby improving efficiency of acquiring the first-arrival path position of the received signal, and saving storage area and power consumption of the UWB system.

The technical scheme of the embodiment of the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a method for acquiring a first-arrival-path position in a UWB system, where the method is applied to a receiver of the UWB system, and the method includes:

acquiring a sampling window reference position according to correlation values of elements at corresponding positions in all pilot symbols in a first sub-domain in a pilot domain of a received signal;

determining the sampling window according to the sampling window reference position and the window length of the sampling window;

and acquiring a first path position according to the correlation values and the threshold of the elements of all the pilot symbols in the second subdomain in the pilot domain of the received signal at the corresponding positions in the sampling window.

In a second aspect, an embodiment of the present invention provides an apparatus for acquiring a first reach location in a UWB system, where the apparatus is configured to implement the method for acquiring a first reach location in a UWB system in the first aspect, and the apparatus includes: the device comprises a sampling window reference position acquisition module, a sampling window determination module and a first reach position acquisition module; wherein the content of the first and second substances,

the sampling window reference position obtaining module is configured to obtain a sampling window reference position according to correlation values of elements at corresponding positions in all pilot symbols in a first sub-domain in a pilot domain of the received signal;

the sampling window determination module is configured to determine the sampling window according to the sampling window reference position and the window length of the sampling window;

the first-arrival-path position obtaining module is configured to obtain a first-arrival-path position according to the correlation value and the threshold of the element of the second sub-domain of the pilot frequency domain of the received signal, wherein the element of the second sub-domain of the pilot frequency domain of the received signal is located at the corresponding position in the sampling window.

In a third aspect, an embodiment of the present invention provides a receiving end device of a UWB system, where the receiving end device includes: a communication interface, a memory and a processor; wherein the content of the first and second substances,

the communication interface is used for receiving and sending signals in the process of receiving and sending information with other external network elements;

the memory for storing a computer program operable on the processor;

the processor is configured to, when running the computer program, execute the steps of the method for acquiring a first arrival path position in the UWB system according to the first aspect.

In a fourth aspect, an embodiment of the present invention provides a computer storage medium, where the computer storage medium stores a program for acquiring an initial path position in a UWB system, and the program for acquiring an initial path position in a UWB system is executed by at least one processor to implement the steps of the method for acquiring an initial path position in a UWB system according to the first aspect.

The embodiment of the application provides a method, a device, equipment and a computer storage medium for acquiring a first reach path position in a UWB system; the efficiency of obtaining the position of the first arrival path of the received signal can be improved, and the storage area and the power consumption of a UWB system are saved.

Drawings

FIG. 1 is a diagram of a network environment according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a communication system architecture according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a frame structure of a UWB system according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a UWB system pilot domain according to an embodiment of the invention;

fig. 5 is a schematic diagram of a wireless transmission scenario in which a reflection path is included in a wireless channel between a transmitter and a receiver in a UWB system according to an embodiment of the present invention;

fig. 6 is a schematic diagram of a wireless channel corresponding to the wireless transmission scenario shown in fig. 5;

fig. 7 is a flowchart of a method for acquiring a first-arrival path position in a UWB system according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of the division and composition of pilot frequency domain in a UWB system according to an embodiment of the invention;

FIG. 9 is a schematic diagram of a sampling window in a UWB system according to an embodiment of the invention;

fig. 10 is a schematic diagram illustrating an apparatus for acquiring a first arrival position in a UWB system according to an embodiment of the present invention;

fig. 11 is a schematic diagram illustrating a receiving end device of a UWB system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

Referring to fig. 1, which shows a schematic diagram of a network environment 100 that can be applied to the technical solutions set forth in the embodiments of the present invention, as an illustrative example and not by way of limitation, taking a wireless communication device 102 as an example, the wireless communication device 102 can wirelessly communicate with other wireless communication devices in a short range of the wireless communication device 102 in the network environment 100, such as a printer 104, a Personal Digital Assistant (PDA) 106, a camera 108, and an access point 110, and can also wirelessly communicate with a speaker system 112 communicatively coupled to the access point 110 and a wireless network 114 through the access point 110. All wireless communication devices in network environment 100 may communicate wirelessly using any suitable wireless standard, such as 802.11x or UWB.

It should be noted that in the network environment 100 shown in fig. 1, the term "wireless communication device" may also be referred to by those skilled in the art as a Mobile Station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a remote device, a mobile subscriber station, an Access Terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology; also, the wireless communication device need not necessarily have mobile capabilities in some examples, but may be stationary; further, a wireless communication device may include several hardware structural components that are pre-sized, shaped, and arranged to facilitate wireless communication, such components may include antennas, antenna arrays, Radio Frequency (RF) chains, amplifiers, one or more processors, and so forth, electrically coupled to one another. Additionally, in some non-limiting examples, other non-limiting examples of wireless communication devices include mobile devices, cellular (cell) phones, smart phones, Session Initiation Protocol (SIP) phones, laptops, Personal Computers (PCs), notebooks, netbooks, smartbooks, tablets, and a wide variety of embedded systems, e.g., corresponding to the "internet of things" (IoT), in addition to the printers, PDAs, cameras, access points, speaker systems, and wireless networks described above. Additionally, the wireless communication device may be an automobile or other transportation vehicle, a remote sensor or actuator, a robot or robotic device, a satellite radio, a Global Positioning System (GPS) device, an object tracking device, a drone, a multi-axis aircraft, a quadcopter, a remote control device, a consumer and/or wearable device (such as glasses), a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (e.g., MP3 player), a camera, a game console, and so forth. Additionally, the wireless communication device may also be a digital home or intelligent home device, such as a home audio, video, and/or multimedia device, an appliance, a vending machine, an intelligent lighting device, a home security system, a smart meter, and so forth. Additionally, the wireless communication device may also be a smart energy device, a security device, a solar panel or array, a municipal infrastructure device (e.g., a smart grid) that controls power, lighting, water, etc.; industrial automation and enterprise equipment; a logistics controller; agricultural equipment; military defense equipment, vehicles, airplanes, boats, weapons, and the like.

With respect to the wireless communication device 102 described above, which is capable of implementing bidirectional wireless communication with any of the other wireless communication devices in the network environment 100 to form the communication system 200, as shown in the architectural diagram of the communication system 200 shown in fig. 2, the communication system 200 may include a transmitter 202 (e.g., the wireless communication device 102 in the network environment 100 shown in fig. 1) and a receiver 206 (e.g., any of the other wireless communication devices in the network environment 100 shown in fig. 1), wherein the transmitter 202 may include one or more transmit antennas 204 (e.g., N1 transmit antennas), and the receiver 206 includes one or more receive antennas 208 (e.g., N2 receive antennas). The transmitter 202 transmits a data stream through the transmit antennas 204, the data stream passes through a wireless channel 210 to each receive antenna 208 of the receiver 206, and the receiver 206 may receive signals from each receive antenna 208 to reconstruct the data stream.

Generally, a receiver of the UWB system performs accurate ranging by acquiring a signal propagated by a first-arrival path channel from a received signal, wherein the first-arrival path is a straight-line path between the receiver and a transmitter.

In an actual wireless transmission environment, a transmission signal may be influenced by factors such as shielding and reflection of objects such as walls and metals in a propagation process, so that a multipath signal is generated. Therefore, the signals received by the receiver often include not only signals propagated by the first path channel between the transmitter and the receiver, but also signals propagated by the reflection path channel between the transmitter and the receiver, and the signals propagated by the first path channel and the reflection path channel are in a superimposed relationship. Since the transmitter of the UWB system transmits monocycles of very short duration and very low duty cycle, the multipath signals received by the receiver are separable in time in the UWB system. Based on the non-overlapping characteristic of the pulse multipath signals in Time, each multipath component in the received signals can be separated through a Time Stamp (Time-Stamp), so that the first-arrival path is obtained, and the ranging is realized.

As can be seen from the above analysis, the UWB system can perform ranging by using the time stamp, and therefore, it is important for the UWB system to be able to accurately calculate the time stamp. Typically, UWB systems primarily utilize the pilot field in their frame structure to compute the time stamps.

Next, first, a frame structure of the UWB system will be described in detail. As shown in fig. 3, the Frame structure of the UWB system may include a pilot field, a Start of Frame Delimiter (SFD) field, and a data field. Specifically, the pilot field in the frame structure of the UWB system may include L pilot symbols as shown in fig. 4, each pilot symbol further includes M elements, and each element corresponds to a position (0 to M-1 in fig. 4 indicate positions of the elements). And calculating the time stamp in the UWB system, namely finding the position of the element corresponding to the first arrival path from the positions of M elements of the pilot symbols in the pilot domain of the received signal.

However, it should be noted that when the position of the element corresponding to the first path is found from the positions of M elements of the pilot symbols in the pilot field of the received signal, the position cannot be determined by merely judging the maximum power value, because in the received signal, the power of the signal propagated by the first path channel may not necessarily be the maximum power value in the signals propagated by all the receiving path channels. For example, fig. 5 is a schematic diagram of a wireless transmission scenario in which two receiving paths exist between a transmitter and a receiver, where one is a first-arrival path of the transmitter and the receiver, and the other is a reflection path formed between the transmitter and the receiver due to a reflection object existing therebetween. Accordingly, fig. 6 is a schematic diagram of a wireless channel corresponding to the wireless transmission scenario shown in fig. 5, and as shown in fig. 5, if there is an obstruction in the middle of the first-reach path between the transmitter and the receiver, the power loss of the first-reach path channel is likely to be greater than the power loss of the channel of the reflection path, and therefore, as shown in fig. 6, the power of the direct-reach via channel is less than the power of the reflection path channel.

If the receiving path corresponding to the Peak of the power of the signal propagated by all receiving path channels between the transmitter and the receiver is referred to as PP (Peak path), and the first reaching path between the transmitter and the receiver is referred to as FP (first reach path), based on the above analysis, in the process of obtaining the first reaching path position of the receiving signal, if the PP is judged as FP by mistake, the accuracy of the ranging of the UWB system will be affected.

Generally, the correlation values of corresponding positions in all pilot symbols in the pilot domain of the received signal may be accumulated to obtain the accumulated correlation value of each position in the pilot symbols, and then the position corresponding to PF, which may be any value between 0 and M-1, is found according to the accumulated correlation value. However, this method is inefficient and wasteful of both memory area and power consumption of the UWB system.

In order to solve the above problem, embodiments of the present application expect to provide a scheme for acquiring a first reaching path position in a UWB system, where the scheme can improve efficiency of acquiring the first reaching path position of a received signal, and save storage area and power consumption of the UWB system, thereby better realizing accurate ranging of the UWB.

Based on this, referring to fig. 7, a method 700 for acquiring a first-arrival-path position in a UWB system according to an embodiment of the present invention is shown, where the method may be applied to the receiver 206 set forth in the foregoing technical solution, and the method may include:

s701, acquiring a reference position of a sampling window according to correlation values of elements at corresponding positions in all pilot symbols of a first sub-domain in a pilot domain of a received signal.

S702, determining the sampling window according to the sampling window reference position and the window length of the sampling window.

S703, acquiring a first path position according to the correlation value and the threshold of the element of the pilot symbols in the second sub-domain in the pilot domain of the received signal, wherein the element of the element is in the corresponding position in the sampling window.

For the technical solution shown in fig. 7, the position of the direct path can be obtained through the correlation value and the threshold of the element, located in the corresponding position, of all the pilot symbols in the second sub-field in the pilot field of the received signal in the sampling window, so that the amount of data to be processed can be reduced, the storage area and the power consumption of the UWB system are saved, and the efficiency of obtaining the first-arrival-path position in the UWB system is improved.

For the solution shown in fig. 7, in some examples, the obtaining the reference position of the sampling window according to the correlation values of the elements at the corresponding positions in all pilot symbols in the first subfield in the pilot field of the received signal includes: for each pilot frequency symbol in the first sub-domain, obtaining a correlation value of each element in each pilot frequency symbol in the first sub-domain according to the preset pilot frequency sequence; accumulating the correlation values of the elements of which all the pilot symbols are at the corresponding positions in the first sub-domain to obtain a first accumulated correlation value of each position in the pilot symbols in the first sub-domain; and determining the position where the maximum value of the first accumulated correlation values of all positions in the pilot symbols in the first sub-domain is located as the sampling window reference position.

For the above example, specifically, first, the L pilot symbols may be divided as shown in fig. 8: using the first F pilot symbols (i.e. pilot symbol 0 to pilot symbol F-1) in the L pilot symbols for calculating the reference position of the sampling window, and defining the first subfield; the second subfield is defined by using the remaining L-F pilot symbols (i.e., pilot symbols F to L-1) for position calculation.

Based on the presetting and dividing, in the process of implementing the above technical solution, according to formula 1, the first F pilot symbols in the pilot domain of the received signal can be obtained

In the pilot symbol at the second

Correlation value of elements of individual positions

：

Equation 1

It should be noted that, as shown in fig. 8, each pilot symbol in the pilot field of the UWB system can be regarded as inserting one of the preset pilot sequences every K-1 0 s

Middle element

Composed of, N denotes a pilot sequence

The length of (a), as can be seen,

. Based on this, define

For the pilot field of the received signal

Information of each pilot symbol, then

Value taken every K elements

That is, the information of the f-th pilot symbol and the pilot sequence

Corresponding information. In the formula 1, the first and second groups of the compound,

representing the dot product operator.

Then, the correlation values of the elements at the corresponding positions in the first F pilot symbols in the pilot field of the received signal may be accumulated by using the method shown in equation 2, so as to obtain the first accumulated correlation value at each position in the first F pilot symbols

。

Equation 2

Finally, as shown in equation 3, the maximum value of the first accumulated correlation values at each position in the first F pilot symbols can be determined as the reference position of the sampling window

。

Equation 3

It should be noted that, according to the actual scene,

the corresponding receiving path corresponding to the maximum receiving power reaches the starting position of the receiver, or the first reaching path reaches the starting position of the receiver

That is to say that the first and second electrodes,

must not exceed

. Based on this, to

For the reference position of the sampling window, the window length of the sampling window is combined

The sampling window can be determined and the determined sampling window can be positioned so that

Falls within the sampling window.

It should be noted that, in different practical application scenarios, the situation of the wireless channel between the transmitter and the receiver of the UWB system may be greatly different. For example, differences in the wireless channel between a transmitter and a receiver, which may be caused by differences in the number of obstructions between the transmitter and the receiver, or differences in the wireless channel between a transmitter and a receiver, which may be caused by differences in the number of reflections between the transmitter and the receiver, etc

Has a certain influence, for example, may result in

Distance between two adjacent plates

Farther or closer. Thus, for the solution shown in fig. 7, in some examples, the method further comprises: and obtaining the window length of the sampling window according to different application scenes.

For the above example, in particular, different settings may be set according to different practical application scenarios

So as to make

Will fall within the sampling window. For example, in a scene with few obstructions,

the value of (a) can be smaller, and in a scene with more shelters,

the value of (a) may be larger. For another example, in a scene with few reflectors,

the value of (a) may be smaller, and in a scenario with many reflectors,

the value of (a) may be larger.

Further, various ways may be employed, depending on the application

And

the sampling window is determined, which is not limited in the embodiments of the present application.

Optionally, can be made of

As a starting position, in combination with the sampling window length

The end position of the sampling window can be obtained

I.e. by

Then according to

And

the sampling window is determined.

Or, alternatively, may also be

For the end position, the length of the sampling window is combined

The start position of the sampling window can be obtained

I.e. by

According to

And

the sampling window is determined.

Yet alternatively, or optionally, in some examples, the method further comprises: according to the maximum distance between the receiver and the transmitter, obtaining the length of the left part of the sampling window from the reference position of the sampling window to the left side limit of the sampling window; according to the clock frequency offset between the receiver and the transmitter, the length of the right part of the sampling window from the reference position of the sampling window to the right side limit of the sampling window is obtained; and obtaining the length of the sampling window according to the left part length from the sampling window reference position to the sampling window left side limit in the sampling window and the right part length from the sampling window reference position to the sampling window right side limit in the sampling window.

For the above example, in particular, as shown in figure 9,

can be prepared from

And

two parts, i.e.

Wherein, in the step (A),

the length of the right part of the sampling window from the reference position of the sampling window to the right side limit of the sampling window,

the length of the left part of the sampling window from the reference position of the sampling window to the left limit of the sampling window is defined; then, in

As a reference position, based on

And

to obtain

I.e. by

(ii) a Then, in order to

As a reference position, based on

And

to obtain

I.e. by

(ii) a Finally, according to

And

the sampling window is determined.

Wherein, for

In particular if the maximum transmission distance between the transmitter and the receiver is

Meter, and the power of the reflection path is greater than that of the first-arrival path, the reflection path is as much as possible longer than the path length of the first-arrival path

Meter, from which it can be calculated according to the following equation 4

。

Equation 4

In the formula 4, the first and second groups of the compound,

is the propagation speed of the received signal in the medium,

is the sampling frequency of the receiver and is,

the function is used to perform the rounding up process.

Wherein, for

In particular, if there is a large clock frequency offset between the receiver and the transmitter,

the power value of the corresponding receiving path is Peak, and the position of the receiving path corresponding to Peak may be shifted to reach when the cumulative correlation value of the element at the corresponding position in the sampling window in each of the last L-F pilot symbols is used

（

Is determined according to the set value of L-F and the magnitude of the clock frequency offset), and therefore,

need to ensure

Within the sampling window.

For the technical solution shown in fig. 7, in some examples, the obtaining a first reach location according to correlation values and thresholds of elements of which all pilot symbols in the second subfield are at corresponding locations within the sampling window includes: for each pilot symbol in the second sub-domain, obtaining a correlation value of each element in each pilot symbol in the second sub-domain within the sampling window according to the preset pilot sequence; accumulating the correlation values of the elements of which all the pilot symbols are at the corresponding positions in the second sub-domain to obtain second accumulated correlation values of all the positions in the sampling window in the pilot symbols in the second sub-domain; and acquiring the first path position according to the absolute value of the second accumulated correlation value of each position in the sampling window in the pilot symbols in the second sub-domain and a threshold.

For the above example, specifically, the method shown in equation 5 may be adopted, and for each pilot symbol in the last L-F pilot symbols in the pilot domain of the received signal, the correlation value of each element in the sampling window in each pilot symbol in the last L-F pilot symbols is obtained according to the preset pilot sequence

。

Equation 5

Then, accumulating the correlation values of the elements of the last L-F pilot symbols in the corresponding positions in the pilot domain of the received signal to obtain second accumulated correlation values of the pilot symbols in the last L-F pilot symbols at each position in the sampling window

。

Equation 6

Finally, according to

And a threshold value

And acquiring the first reaching diameter position.

For the technical solution shown in fig. 7, in some examples, the obtaining the first path position according to an absolute value of a second accumulated correlation value of each position in the pilot symbols in the second sub-domain within the sampling window and a threshold includes: and determining the position where a second accumulated correlation value which is greater than the threshold value in the absolute values of the second accumulated correlation values of all positions in the sampling window in the pilot symbols in the second sub-domain is located as the first path position.

For the above examples, in particular, one may turn to

From the leftmost position of the sampling window

Start and

comparing to the rightmost position of the sampling window

Finish the comparison, if

Then it will be at this time

The value of (a) is determined as the position of the first arrival path.

It can be seen that assuming that the window length of the sampling window is M/2, half of the storage area and power consumption can be saved with method 700 compared to the conventional method.

For the solution shown in fig. 7, in some examples, the method further comprises: and obtaining the threshold value according to the variance of the absolute value of the second accumulated correlation value of each position in the pilot symbols in the second sub-domain in the sampling window and the gain factor.

For the above example, specifically, the threshold is a threshold for determining an absolute value of the second accumulated correlation value at each position in the pilot symbol in the second sub-domain, and the threshold may be obtained by equation 7 in the embodiment of the present invention.

Equation 7

In the formula 7, the first and second groups,

for calculating a variance of absolute values of the second accumulated correlation values for positions in pilot symbols in the second subfield,ais the gain factor of the gain control element,afor according to the actual application scene

Appropriate scaling to obtain the appropriate

. For example, if

Too large, may result in the inability to obtain the first-to-reach location

Therefore, it is necessary to appropriately perform the scaling adjustment adaptation of the gain factor a.

Based on the same inventive concept of the foregoing technical solution, referring to fig. 10, an apparatus 1000 for acquiring a first-arrival-path position in a UWB system according to an embodiment of the present invention is shown, where the apparatus 1000 includes: a sampling window reference position acquisition module 1001, a sampling window determination module 1002 and a first reaching path position acquisition module 1003; wherein the content of the first and second substances,

the sampling window reference position obtaining module 1001 is configured to obtain a sampling window reference position according to correlation values of elements at corresponding positions in all pilot symbols in the first sub-domain in the pilot domain of the received signal;

the sampling window determination module 1002 configured to determine the sampling window according to the sampling window reference position and a window length of the sampling window;

the first reach position obtaining module 1003 is configured to obtain a first reach position according to correlation values and thresholds of elements, in the pilot domain of the received signal, of all pilot symbols in the second sub-domain that are in corresponding positions within the sampling window.

It is understood that in this embodiment, "part" may be part of a circuit, part of a processor, part of a program or software, etc., and may also be a unit, and may also be a module or a non-modular.

In addition, each component in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit. The integrated unit can be realized in a hardware mode, and can also be realized in a software functional module mode.

Based on the understanding that the technical solution of the present embodiment essentially or a part contributing to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, and include several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the present embodiment. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

Therefore, the present embodiment provides a computer storage medium, where a program for acquiring an initial path position in a UWB system is stored, and when the program for acquiring an initial path position in a UWB system is executed by at least one processor, the computer storage medium implements the steps of the method for acquiring an initial path position in a UWB system according to this technical solution.

Referring to fig. 11, it shows a hardware structure of a receiving end device 1100 of a UWB system capable of implementing the apparatus 1000 for acquiring a first-arrival position in the UWB system according to an embodiment of the present invention, where the receiving end device 1100 of the UWB system may be a wireless device, a mobile or cellular phone (including a so-called smart phone), a Personal Digital Assistant (PDA), a video game console (including a video display, a mobile video game device, a mobile video conference unit), a laptop computer, a desktop computer, a television set-top box, a tablet computing device, an e-book reader, a fixed or mobile media player, and the like. The receiving-end apparatus 1100 of the UWB system includes: a communication interface 1101, a memory 1102 and a processor 1103; the various components are coupled together by a bus system 1104. It is understood that the bus system 1104 is used to enable communications among the components for connection. The bus system 1104 includes a power bus, a control bus, and a status signal bus in addition to the data bus. For clarity of illustration, however, the various buses are designated as the bus system 1104 in FIG. 11. Wherein the content of the first and second substances,

the communication interface 1101 is configured to receive and transmit signals in a process of receiving and transmitting information with other external network elements;

the memory 1102 is used for storing a computer program capable of running on the processor 1103;

the processor 1103 is configured to, when running the computer program, perform the following steps:

acquiring a reference position of a sampling window according to correlation values of elements at corresponding positions in all pilot symbols of a first sub-domain in a pilot domain of a received signal;

and acquiring a first reach path position according to the correlation values and the threshold values of the elements of all the pilot symbols in the second sub-field in the pilot field of the received signal at the corresponding positions in the sampling window.

It is to be understood that the memory 1102 in embodiments of the present invention can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of illustration and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (ddr Data Rate SDRAM, ddr SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 1102 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

The processor 1103 may be an integrated circuit chip having signal processing capability. In implementation, the steps of the method may be performed by instructions in the form of hardware, integrated logic circuits or software in the processor 1103. The Processor 1103 may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1102, and the processor 1103 reads the information in the memory 1102 and performs the steps of the method in conjunction with its hardware.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or any combination thereof. For a hardware implementation, the Processing units may be implemented within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units configured to perform the functions described herein, or a combination thereof.

For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

Specifically, when the processor 1103 is further configured to run the computer program, the method step for acquiring the first reach path position in the UWB system in the foregoing technical solution is executed, and details are not repeated here.

It should be understood that the exemplary technical solutions of the apparatus 1000 for acquiring an initial path position in the UWB system and the receiving end device 1100 in the UWB system belong to the same concept as the technical solution of the method for acquiring an initial path position in the UWB system, and therefore, the detailed contents of the technical solutions of the apparatus 1000 for acquiring an initial path position in the UWB system and the receiving end device 1100 in the UWB system, which are not described in detail, can be referred to the description of the technical solution of the method for acquiring an initial path position in the UWB system. The embodiments of the present invention will not be described in detail herein.

It should be noted that: the technical schemes described in the embodiments of the present invention can be combined arbitrarily without conflict.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A method for acquiring a first-arrival-path position in a UWB system is applied to a receiving end device of the UWB system, and is characterized in that the method comprises the following steps:

2. The method of claim 1, wherein obtaining the reference position of the sampling window according to the correlation values of the elements at the corresponding positions in all the pilot symbols in the first sub-domain in the pilot domain of the received signal comprises:

for each pilot frequency symbol in the first sub-domain, obtaining a correlation value of each element in each pilot frequency symbol in the first sub-domain according to the preset pilot frequency sequence;

accumulating the correlation values of the elements of which all the pilot symbols are at the corresponding positions in the first sub-domain to obtain a first accumulated correlation value of each position in the pilot symbols in the first sub-domain;

and determining the position where the maximum value of the first accumulated correlation values of all positions in the pilot symbols in the first sub-domain is located as the sampling window reference position.

3. The method of claim 1, wherein obtaining the first-arrival-path position according to the correlation value and the threshold of the element at the corresponding position in the second sub-field of the pilot field of the received signal, comprises:

for each pilot symbol in the second sub-domain, obtaining a correlation value of each element in each pilot symbol in the second sub-domain within the sampling window according to the preset pilot sequence;

accumulating the correlation values of the elements of which all the pilot symbols are at the corresponding positions in the second sub-domain to obtain second accumulated correlation values of all the positions in the sampling window in the pilot symbols in the second sub-domain;

and acquiring the first path position according to the absolute value of the second accumulated correlation value of each position in the sampling window in the pilot symbols in the second sub-domain and a threshold.

4. The method of claim 3, wherein obtaining the first path position according to the absolute value of the second accumulated correlation value and a threshold value at each position in the pilot symbols in the second sub-domain within the sampling window comprises:

and determining the position where a second accumulated correlation value which is greater than the threshold value in the absolute values of the second accumulated correlation values of all positions in the sampling window in the pilot symbols in the second sub-domain is located as the first path position.

5. The method of claim 1, further comprising:

according to the maximum distance between the receiver and the transmitter, obtaining the length of the left part of the sampling window from the reference position of the sampling window to the left side limit of the sampling window;

according to the clock frequency offset between the receiver and the transmitter, the length of the right part of the sampling window from the reference position of the sampling window to the right side limit of the sampling window is obtained;

and obtaining the length of the sampling window according to the left part length from the sampling window reference position to the sampling window left side limit in the sampling window and the right part length from the sampling window reference position to the sampling window right side limit in the sampling window.

6. The method of claim 1, further comprising:

and obtaining the threshold value according to the variance of the absolute value of the second accumulated correlation value of each position in the pilot symbols in the second sub-domain in the sampling window and the gain factor.

7. The method of claim 1, further comprising:

and obtaining the window length of the sampling window according to different application scenes.

8. An apparatus for acquiring a head-to-reach position in a UWB system, the apparatus comprising: the device comprises a sampling window reference position acquisition module, a sampling window determination module and a first reach position acquisition module; wherein the content of the first and second substances,

9. A receiving-end device of a UWB system, the device comprising: a communication interface, a memory and a processor; wherein the content of the first and second substances,

the memory for storing a computer program operable on the processor;

the processor, when executing the computer program, is configured to perform the steps of the method for acquiring a head-to-reach position in the UWB system according to any of claims 1 to 7.

10. A computer storage medium, wherein the computer readable medium stores a program for acquiring a first-arrival path position in a UWB system, and wherein the program for acquiring a first-arrival path position in the UWB system when executed by at least one processor implements the steps of the method for acquiring a first-arrival path position in a UWB system according to any one of claims 1 to 7.