CN114374985B - Method and device for correcting received signal strength of ultra-bandwidth signal and electronic equipment - Google Patents
Method and device for correcting received signal strength of ultra-bandwidth signal and electronic equipment Download PDFInfo
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Abstract
The embodiment of the application discloses a received signal strength correction method and device of an ultra-wideband signal and electronic equipment. The method comprises the following steps: when receiving the ultra-bandwidth UWB signal, obtaining a channel impulse response for the UWB signal; determining a first power parameter and a second power parameter according to the channel impulse response; determining a first ratio parameter according to the first power parameter and the second power parameter; and determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by using the correction function. Therefore, in the embodiment of the application, the correction function for correcting the received signal strength of the UWB signal is determined through the first ratio parameter, so that the received signal strength of the UWB signal is corrected through the correction function, which is beneficial to ensuring that the corrected received signal strength of the UWB signal is more accurate and that the error between the corrected received signal strength of the UWB signal and the actual received signal strength is smaller.
Description
Technical Field
The present application relates to the field of wireless communications, and in particular, to a method and an apparatus for correcting received signal strength of an ultra-wideband signal, and an electronic device.
Background
Ultra Wide Band (UWB) technology is a wireless carrier communication technology that is characterized by transmitting a UWB signal encoded by pulse modulation at a lower power and a wider frequency Band range over a short distance.
In a UWB wireless communication system, an electronic device may receive UWB signals from other devices. However, since multipath components in the received UWB signal will affect the estimation of the received signal strength of the UWB signal by the electronic device, and the error between the received signal strength estimated by the electronic device and the actual received signal strength is large, further research is required on how to correct the received signal strength of the UWB signal.
Disclosure of Invention
The embodiment of the application provides a method and a device for correcting the received signal strength of an ultra-wideband signal and electronic equipment, so that the received signal strength of the corrected UWB signal is expected to be more accurate, and the error between the received signal strength of the corrected UWB signal and the actual received signal strength is smaller.
In a first aspect, an embodiment of the present application provides a method for correcting received signal strength of an ultra-wideband signal, which is applied to an electronic device; the method comprises the following steps:
When receiving an ultra-bandwidth UWB signal, acquiring a channel impulse response for the UWB signal;
determining a first power parameter and a second power parameter according to the channel impulse response, wherein the first power parameter is used for representing the total power value of the channel impulse response, and the second power parameter is used for representing the power value of the range transmission in the channel impulse response;
determining a first ratio parameter according to the first power parameter and the second power parameter, wherein the first ratio parameter is used for representing the proportion of multipath components in the UWB signal to the UWB signal;
and determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by utilizing the correction function.
In a second aspect, an embodiment of the present application provides a received signal strength correction device for an ultra-bandwidth signal, which is applied to an electronic device; the device comprises a processing unit and a communication unit, wherein the processing unit is used for:
when the communication unit receives an ultra-bandwidth UWB signal, acquiring a channel impulse response aiming at the UWB signal;
determining a first power parameter and a second power parameter according to the channel impulse response, wherein the first power parameter is used for representing the total power value of the channel impulse response, and the second power parameter is used for representing the power value of the range transmission in the channel impulse response;
Determining a first ratio parameter according to the first power parameter and the second power parameter, wherein the first ratio parameter is used for representing the proportion of multipath components in the UWB signal to the UWB signal;
and determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by utilizing the correction function.
In a third aspect, an embodiment of the present application provides an electronic device, including a processor, a memory, and a communication interface, where the memory stores one or more programs, and where the one or more programs are executed by the processor, where the one or more programs are configured to execute instructions of the steps in the first aspect of the embodiment of the present application.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium storing a computer program for electronic data exchange, the computer program being operable to cause a computer to perform some or all of the steps described in the first aspect of the embodiments of the present application.
In a fifth aspect, embodiments of the present application provide a computer program product, wherein the computer program product comprises a computer program operable to cause a computer to perform some or all of the steps described in the first aspect of the embodiments of the present application. The computer program product may be a software installation package.
It can be seen that in the embodiment of the present application, by receiving a UWB signal and acquiring a channel impulse response for the UWB signal; then, determining a first power parameter and a second power parameter according to the channel impulse response, and determining a first ratio parameter according to the first power parameter and the second power parameter; and finally, determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by utilizing the correction function. Because the first power parameter is used for representing the total power value of the channel impulse response and the second power parameter is used for representing the power value of the line-of-sight transmission in the channel impulse response, the application determines the proportion of the multipath component in the UWB signal to the UWB signal according to the total power value of the channel impulse response corresponding to the UWB signal and the power value of the line-of-sight transmission in the channel impulse response corresponding to the UWB signal, and determines the correction function for correcting the received signal strength of the UWB signal according to the proportion, thereby realizing correction of the received signal strength of the UWB signal by the correction function, being beneficial to ensuring that the received signal strength of the corrected UWB signal is more accurate and the error between the received signal strength of the corrected UWB signal and the actual received signal strength is smaller.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is evident that the figures described below are only some embodiments of the application, from which other figures can be obtained without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a UWB communication scenario provided in an embodiment of the present application;
FIG. 4 is a schematic diagram of a comparison result between a curve of estimated received signal strength and a curve of actual received signal strength according to an embodiment of the present application;
fig. 5 is a flow chart of a method for correcting received signal strength of an ultra-bandwidth signal according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a channel impulse response according to an embodiment of the present application;
fig. 7 is a flowchart of a method for correcting the received signal strength of an ultra-wideband signal according to an embodiment of the present application;
Fig. 8 is a functional block diagram of a received signal strength correction device for ultra-bandwidth signals according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of still another electronic device according to an embodiment of the present application.
Detailed Description
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, software, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The technical scheme of the embodiment of the application can be applied to a wireless communication system shown in fig. 1. Among other things, wireless communication system 10 includes an electronic device 110 and a base station 120, and UWB signals may be interacted between electronic device 110 and base station 120. It should be noted that fig. 1 is only an example of the wireless communication system in the embodiment of the present application, and the wireless communication system 10 may further include other number of base stations and other number of electronic devices, which is not limited in particular.
Specifically, the electronic device 110 in the embodiment of the present application may be a user equipment supporting UWB technology or an internet of things device, and may be a user equipment supporting UWB technology, for example, a User Equipment (UE), a terminal device (terminal device), a Mobile Terminal (MT), an intelligent terminal (intelligent terminal, IT), a personal digital assistant (personal digital assistant, PDA), a personal computer (personal computer, PC), or the like; the device can also be an internet of things device, a vehicle-mounted device and a wearable device which support UWB technology, such as a key, a wallet, a camera, household equipment, office equipment, a watch or a bracelet, and the like.
Specifically, the base station 120 in the embodiment of the present application may be a server device supporting UWB technology, for example, a UWB base station, a UWB anchor device, and the like.
The electronic device 110 will be described in detail below in conjunction with fig. 2, it being understood that the configuration illustrated in fig. 2 does not constitute a specific limitation on the electronic device 110. In other embodiments of the application, electronic device 110 may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the application. The electronic device 110 may include a processor 201, a communication module 202, a storage module 203, and a power management module 204. The processor 201 is connected to and controls the communication module 202, the storage module 203, and the power management module 204 in the form of corresponding buses. The processor 201 is a control center of the electronic device 110, and connects various parts of the electronic device 110 through various interfaces and lines.
Specifically, the processor 201 invokes stored data in the memory by running or executing software programs and/or modules within the memory module 203 to perform various functions of the electronic device 110 and process the data, and to monitor the overall operation of the electronic device 110. Optionally, the processor 201 may include a processor that may include a central processor (central processing unit, CPU), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor and/or a neural network processor (neural-network processing unit, NPU), a field programmable gate array (field programmable gate array, FPGA), or the like.
Specifically, the communication unit 202 may implement functions of UWB communication, a second generation 2G mobile communication technology network, a third generation 3G mobile communication technology network, a fourth generation 4G mobile communication technology network, and a fifth generation 5G mobile communication technology network to perform reception and transmission of wireless mobile network data, and may provide channel spectrum resources of 2.4GHz and 5GHz to perform reception and transmission of network data. That is, the communication unit 202 may include one or more of a UWB module, a Bluetooth module, a Wi-Fi module, a Zigbee module, and a 2G/3G/4G/5G mobile communication module.
In particular, the memory module 203 may be used to store software programs and/or modules, and may include a memory program area and a memory data area. The storage program area may be used to store an operating system or a software program required for at least one function, etc., and the software program required for the at least one function may be used to perform the received signal strength correction function, etc., in the embodiment of the present application. In addition, the storage module 203 may include a random access memory (random access memory, RAM), a read-only memory (rom), a non-transitory computer readable medium (non-transitory computer-readable storage medium), and the like.
Specifically, the power management module 204 may include a power management chip and may provide power conversion, distribution, detection, etc. management functions for the electronic device 110.
Further, the electronic device 110 in the embodiment of the present application may include a hardware layer, an operating system layer running above the hardware layer, and an application layer running above the operating system layer. The hardware layer includes hardware such as a central processing unit (central processing unit, CPU), a memory management unit (memory management unit, MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processes through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a Windows operating system. The application layer comprises applications such as a browser, an address book, word processing software, instant messaging software and the like. Further, the embodiment of the present application is not particularly limited to the specific structure of the execution body of the method provided by the embodiment of the present application, as long as the communication can be performed by the method provided according to the embodiment of the present application by running the program recorded with the code of the method provided by the embodiment of the present application, and for example, the execution body of the method provided by the embodiment of the present application may be the electronic device 110, or a functional module in the electronic device 110 that can call the program and execute the program.
For a better understanding of aspects of embodiments of the present application, related terms and concepts that may be related to embodiments of the present application are described below.
1. Ultra Wideband (UWB)
UWB technology is a wireless carrier communication technology characterized by transmitting a UWB signal encoded by pulse modulation at a lower power and a wider frequency band range over a short distance. According to the federal communications commission (Federal Communications Commission of the United States) standard, UWB operates in a band that occupies more than 500MHz in the 3.1 to 10.6GHz spectral range and transmits data using non-sinusoidal narrow pulses on the order of nanoseconds to microseconds. The traditional UWB technology is used for positioning industrial places such as mines, warehouses and the like, and the main application scene is to monitor the real-time positions of staff and cargoes indoors. The base stations are well calibrated in indoor places and are connected with each other in a wired or Wi-Fi mode to synchronize. In the example application scenario shown in fig. 3, a represents a base station supporting UWB technology, a central location engine personal computer (central location engine personal computer, CLE PC) may perform unified management on the base station, and Ehternet LAN-TCP/IP represents a transmission control protocol/internet protocol supporting an ethernet local area network between the base stations, and location monitoring for wearing electronic devices is implemented by setting at least one base station in each area.
2. Received signal strength of UWB signal
When a UWB signal is received by the UWB module, the UWB chip (which may be integrated in the processor) may estimate the received signal strength of the UWB signal. The received signal strength may include, among other things, a received signal level (receivesignal level, RSL), a received signal strength indication (received signal strength indicator, RSSI), or a received signal power. At this time, there may be an error between the received signal strength estimated by the UWB chip and the actual received signal strength.
Referring to fig. 4, fig. 4 is a schematic diagram of a comparison result between an estimated received signal strength curve and an actual received signal strength curve according to an embodiment of the present application. Where "free space" means that the UWB signal is free of multipath effects during transmission, and "multipath" means that the UWB signal is multipath effects during transmission, and that the multipath effects result in multipath components (multipath component) of the received UWB signal. When the actual received signal strength is less than-85 dBm, the error between the received signal strength estimated by the UWB chip and the actual received signal strength is small; when the actual received signal strength is greater than-85 dBm, the error between the received signal strength estimated by the UWB chip and the actual received signal strength is large. Furthermore, from the fact that the "estimated received signal strength (64 MHz free space)" curve and the "estimated received signal strength (64 MHz multipath)" curve do not completely coincide, multipath components in the received UWB signal will affect the estimation of the received signal strength of the UWB signal by the UWB chip.
In summary, since multipath components in the received UWB signal affect the estimation of the received signal strength of the UWB signal by the UWB chip, and the error between the estimated received signal strength and the actual received signal strength of the UWB chip is large, further research is required for correcting the received signal strength of the UWB signal.
In connection with the above description, the following describes the execution steps of the received signal strength correction method of the ultrawide bandwidth signal from the point of view of the method example, referring to fig. 5. Fig. 5 is a flowchart of a method for correcting received signal strength of an ultra-wideband signal according to an embodiment of the present application, where the method is applied to an electronic device 110. The method comprises the following steps:
s510, when a UWB signal is received, a channel impulse response for the UWB signal is acquired.
It should be noted that, since the UWB signal can be decomposed into a linear superposition of a plurality of unit pulse signals, the embodiments of the present application reflect the basic characteristics of the channel through which the UWB signal is transmitted through the channel impulse response (Channel Impulse Response, CIR).
Specifically, the electronic device of the embodiment of the application may include a processor and a UWB module. Thus, upon receipt of an ultrawide UWB signal, acquiring a channel impulse response for the UWB signal may include the operations of: upon receipt of the UWB signal by the UWB module, a channel impulse response is acquired from the UWB module for the UWB signal. It will be appreciated that embodiments of the present application acquire a channel impulse response for a UWB signal from a UWB module by a processor in an electronic device.
S520, determining a first power parameter and a second power parameter according to the channel impulse response.
Wherein the first power parameter may be used to represent a total power value of the channel impulse response; the second power parameter may be used to represent a power value for line-of-sight transmission in the channel impulse response.
The propagation conditions of the wireless communication system in the embodiment of the present application are divided into line of sight (LOS) and non-line of sight (not line of sight). Under the line-of-sight transmission condition, UWB signals propagate in a straight line between a transmitting end and a receiving end without being blocked, and communication of UWB signal transmission is performed by using a line-of-sight transmission method, which is called line-of-sight communication. Under non-line-of-sight transmission conditions, UWB signals are subject to diffraction, reflection and scattering by ground objects, and refraction, reflection, absorption and scattering by the atmosphere, thereby causing amplitude fading, multipath delay, fluctuation of angle of arrival and depolarization phenomena of UWB signals. In summary, the embodiments of the present application analyze line-of-sight transmissions and non-line-of-sight transmissions in a wireless communication system through channel impulse responses. The total power value of the channel impulse response may include a power value of line-of-sight transmission in the channel impulse response and a power value of non-line-of-sight transmission in the channel impulse response.
The following embodiments of the present application will exemplify how to determine the first power parameter and the second power parameter according to the channel impulse response.
In one possible example, determining the first power parameter and the second power parameter from the channel impulse response may include the operations of: acquiring a starting position of apparent distance transmission in a channel impulse response; starting from the initial position of video transmission, sequentially performing amplitude sampling on channel impulse response to obtain M amplitude sampling values which are sequentially arranged, wherein M is an integer; and determining a first power parameter and a second power parameter according to the M amplitude sampling values.
The M amplitude sampling values comprise amplitude sampling values corresponding to line-of-sight transmission and amplitude sampling values corresponding to all non-line-of-sight transmission.
It should be noted that, in the embodiment of the present application, the amplitude sampling is performed on the channel impulse response to obtain the amplitude sampling value, so as to determine the first power parameter and the second power parameter according to the amplitude sampling value.
It should be further noted that, when the electronic device receives the UWB signal, the signal component of the UWB signal that is transmitted along the line of sight reaches the electronic device before the signal component of the UWB signal that is transmitted along the non-line of sight (such as multipath component). Meanwhile, in the channel impulse response corresponding to the UWB signal, the first peak in the channel impulse response is generated by a signal component transmitted along the line of sight, so that the embodiment of the present application may use the starting position generated by the first peak in the channel impulse response as the starting position of the line of sight transmission in the channel impulse response.
For example, as shown in fig. 6, fig. 6 is a schematic structural diagram of a channel impulse response according to an embodiment of the present application. Wherein several amplitude values before the "start position of line of sight transmission" are caused by noise in the channel, ignored. The amplitude value after the "start position of line-of-sight transmission" is caused by the non-line-of-sight transmitted signal component in the UWB signal and the non-line-of-sight transmitted signal component in the UWB signal, and the first peak in the channel impulse response is caused by the non-line-of-sight transmitted signal component in the UWB signal.
Specifically, determining the first power parameter and the second functional parameter according to the M amplitude sampling values may include the following operations: acquiring the first N amplitude sampling values in M amplitude sampling values, wherein N is an integer smaller than or equal to M; determining a first power parameter according to all amplitude sampling values in the M amplitude sampling values; a second power parameter is determined from the first N amplitude sample values.
Wherein the maximum value of N may be 3.
For example, in FIG. 6, A 1 、A 2 And A 3 Representing the first N of the M amplitude sample values, respectively. Wherein M amplitude sampling values are all amplitude sampling values after the 'initial position of line-of-sight' transmission, namely A 1 、A 2 、A 3 、A 4 、…、A M . At this time, the electronic device may be according to A 1 、A 2 And A 3 Determining a second power parameter FP:
FP＝A1^2+A2^2+A3^2。
similarly, the electronic device can be based on A 1 、A 2 、A 3 、A 4 、…、A M Determining a first power parameter C:
C＝A 1 ^2+A 2 ^2+A 3 ^2+…+A M ^2。
s530, determining a first ratio parameter according to the first power parameter and the second power parameter.
Wherein a first ratio parameter may be used to represent the proportional magnitude of multipath components in the UWB signal to the UWB signal.
It should be noted that, as the above description indicates that the multipath component in the UWB signal received by the electronic device will affect the estimation of the received signal strength of the UWB signal by the UWB chip in the electronic device, the embodiment of the present application determines the proportion of the multipath component in the UWB signal to the UWB signal by the total power value (first power parameter) of the channel impulse response corresponding to the UWB signal and the power value (second power parameter) of the line-of-sight transmission in the channel impulse response corresponding to the UWB signal, so as to analyze how to correct the received signal strength of the UWB signal by the proportion.
An example of how the first ratio parameter is determined based on the first power parameter and the second power parameter will be described below.
In one possible example, determining the first ratio parameter from the first power parameter and the second power parameter may include the operations of: calculating a difference between the first power parameter and the second power parameter to obtain a first difference parameter; a ratio between the first difference parameter and the first power parameter is calculated to obtain a first ratio parameter.
It is understood that the first ratio parameter satisfies the following relationship:
R＝(C-FP)/C，
wherein R represents a first ratio parameter, C represents a first power parameter, FP represents a second power parameter.
S540, determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by using the correction function.
The received signal strength of the UWB signal may include a received signal level (receivesignal level, RSL) of the UWB signal, a received signal strength indication (received signal strength indicator, RSSI) of the UWB signal, or a received signal power of the UWB signal, among others.
It should be noted that, because the first ratio parameter indicates the proportion of the multipath component in the UWB signal to the UWB signal, the embodiment of the present application determines the correction function for correcting the received signal strength of the UWB signal according to the proportion, so as to correct the received signal strength of the UWB signal according to the correction function, and reduce the error between the received signal strength of the corrected UWB signal and the actual received signal strength.
An example of how the correction function is determined based on the first ratio parameter will be described in the following embodiments of the present application.
In one possible example, the correction function may include a first correction function or a second correction function; determining a correction function based on the first ratio parameter may include the operations of: if the first ratio parameter is larger than a first preset threshold value, determining the correction function as a first correction function; or if the first ratio parameter is smaller than or equal to the first preset threshold value, determining the correction function as a second correction function.
In particular, the first correction function and the second correction function may be specific piecewise functions. It should be noted that from the graph in fig. 4, the following conclusion can be drawn: when the actual received signal strength is smaller than-85 dBm, the error between the estimated received signal strength and the actual received signal strength is smaller; when the actual received signal strength is greater than-85 dBm, the error between the estimated received signal strength and the actual received signal strength is large. Therefore, according to the embodiment of the application, through the conclusion, the first correction function and the second correction function are designed into the specific piecewise function, so that the designed first correction function and second correction function are ensured to meet the characteristics reflected by the conclusion, the received signal strength of the UWB signal corrected by the first correction function or the second correction function is improved, and the error is smaller.
Further, the first correction function may satisfy the following formula:
wherein f 1 (x) Representing a first modified function, x representing the received signal strength of the UWB signal, x 0 Represents a second preset threshold, g 1 (x) And p 1 (x) Representing a preset function.
X is the number 0 Is a predetermined threshold determined from a plurality of experimental data, such as [ -90, -80 in FIG. 3]Arbitrary values in between. Similarly, g 1 (x) And p 1 (x) Is two preset functions determined by multiple experimental data. Wherein g 1 (x) The following relationship may be satisfied: g 1 (x)＝x。
Further, the second correction function may satisfy the following formula:
wherein f 2 (x) Representation ofA second correction function, x, representing the received signal strength of the UWB signal, x 0 Represents a second preset threshold, g 2 (x) And p 2 (x) Representing a preset function.
G is as follows 2 (x) And p 2 (x) Is two preset functions determined by multiple experimental data. Wherein g 2 (x) The following relationship may be satisfied: g 2 (x)＝x。
It can be seen that in the embodiment of the present application, by receiving a UWB signal and acquiring a channel impulse response for the UWB signal; then, determining a first power parameter and a second power parameter according to the channel impulse response, and determining a first ratio parameter according to the first power parameter and the second power parameter; and finally, determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by utilizing the correction function. Because the first power parameter is used for representing the total power value of the channel impulse response and the second power parameter is used for representing the power value of the line-of-sight transmission in the channel impulse response, the application determines the proportion of the multipath component in the UWB signal to the UWB signal according to the total power value of the channel impulse response corresponding to the UWB signal and the power value of the line-of-sight transmission in the channel impulse response corresponding to the UWB signal, and determines the correction function for correcting the received signal strength of the UWB signal according to the proportion, thereby realizing correction of the received signal strength of the UWB signal by the correction function, being beneficial to ensuring that the received signal strength of the corrected UWB signal is more accurate and the error between the received signal strength of the corrected UWB signal and the actual received signal strength is smaller.
In accordance with the above embodiment, please refer to fig. 7. Fig. 7 is a flowchart of another method for correcting the received signal strength of an ultra-wideband signal according to an embodiment of the present application, where the method is applied to an electronic device 110, and the electronic device 110 may include a processor and a UWB module. The method comprises the following steps:
s710, when the UWB module of the electronic device receives the UWB signal, the processor of the electronic device acquires the channel impulse response of the UWB module for the UWB signal.
S720, the processor of the electronic device acquires the starting position of the line-of-sight transmission in the channel impulse response.
And S730, the processor of the electronic equipment sequentially performs amplitude sampling on the channel impulse response from the starting position of the line-of-sight transmission to obtain M amplitude sampling values which are sequentially arranged.
Wherein M is an integer.
S740, the processor of the electronic device determines a first power parameter and a second power parameter according to the M amplitude sampling values.
In one possible example, determining the first power parameter and the second functional parameter from the M amplitude sample values may include the operations of: acquiring the first N amplitude sampling values in M amplitude sampling values, wherein N is an integer smaller than or equal to M; determining a first power parameter according to all amplitude sampling values in the M amplitude sampling values; and determining the second power parameter according to the first N amplitude sampling values.
S750, the processor of the electronic device determines a first ratio parameter according to the first power parameter and the second power parameter.
In one possible example, determining the first ratio parameter from the first power parameter and the second power parameter may include the operations of: calculating a difference between the first power parameter and the second power parameter to obtain a first difference parameter; a ratio between the first difference parameter and the first power parameter is calculated to obtain a first ratio parameter.
S760, the processor of the electronic device determines a correction function according to the first ratio parameter, and corrects the received signal strength of the UWB signal by using the correction function.
In one possible example, the correction function may include a first correction function or a second correction function; determining a correction function based on the first ratio parameter may include the operations of: if the first ratio parameter is larger than a first preset threshold value, determining the correction function as a first correction function; or if the first ratio parameter is smaller than or equal to the first preset threshold value, determining the correction function as a second correction function.
In one possible example, the first correction function and the second correction function are specific piecewise functions; the first correction function satisfies the following formula:
Wherein f 1 (x) Representing a first modified function, x representing the received signal strength of the UWB signal, x 0 Represents a second preset threshold, g 1 (x) And p 1 (x) Representing a preset function;
the second correction function satisfies the following formula:
wherein f 2 (x) Representing a first modified function, x representing the received signal strength of the UWB signal, x 0 Represents a second preset threshold, g 2 (x) And p 2 (x) Representing a preset function.
Note that, the technical solution in the embodiment shown in fig. 7 is identical to the technical solution in the embodiment shown in fig. 5. Accordingly, some embodiments of the embodiments shown in fig. 7 may be referred to the detailed description in fig. 5, and will not be described again here.
It can be seen that in the embodiment of the present application, a UWB signal is received by a UWB module, and a channel impulse response of the UWB signal is obtained from the UWB module; secondly, acquiring a starting position of line-of-sight transmission in the channel impulse response, and starting from the starting position, sequentially performing amplitude sampling on the channel impulse response to obtain M amplitude sampling values which are sequentially arranged; thirdly, determining a first power parameter and a second power parameter according to the M amplitude sampling values, and determining a first ratio parameter according to the first power parameter and the second power parameter; and finally, determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by utilizing the correction function. Since the M amplitude sampling values are obtained by amplitude sampling the channel impulse response, the first power parameter and the second power parameter are determined and determined through the channel impulse response. In addition, because the first power parameter is used for representing the total power value of the channel impulse response and the second power parameter is used for representing the power value of the line-of-sight transmission in the channel impulse response, the application determines the proportion of the multipath component in the UWB signal to the UWB signal according to the total power value of the channel impulse response corresponding to the UWB signal and the power value of the line-of-sight transmission in the signal channel impulse response corresponding to the UWB signal, and determines the correction function for correcting the received signal strength of the UWB signal according to the proportion, thereby realizing correction of the received signal strength of the UWB signal by the correction function, being beneficial to ensuring more accurate received signal strength of the corrected UWB signal and smaller error between the received signal strength of the corrected UWB signal and the actual received signal strength.
The foregoing description of the embodiments of the present application has been presented primarily in terms of a method-side implementation. It will be appreciated that the electronic device, in order to achieve the above-described functions, includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The embodiment of the application can divide the functional units of the electronic device according to the method example, for example, each functional unit can be divided corresponding to each function, and two or more functions can be integrated in one processing unit. The integrated units may be implemented in hardware or in software functional units. It should be noted that, in the embodiment of the present application, the division of the units is schematic, but only one logic function is divided, and another division manner may be adopted in actual implementation.
In the case of using an integrated unit, fig. 8 shows a functional unit block diagram of a received signal strength correction device for an ultra-wideband signal. The received signal strength correction device 800 for ultra-wideband signals is applied to an electronic device, and specifically includes: a processing unit 820 and a communication unit 830. The processing unit 820 is used for controlling and managing the actions of the electronic device, e.g., the processing unit 820 is used for supporting the electronic device to perform some or all of the steps in fig. 5 or fig. 7, as well as other processes for the techniques described herein. The communication unit 830 is used to support communication of the electronic device with other devices. The electronic device may further comprise a storage unit 810 for storing program code and data for the electronic device.
The processing unit 820 may be a processor or controller, such as a CPU, general-purpose processor, DSP, ASIC, FPGA, or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various exemplary logical blocks, modules, and circuits described in connection with the present disclosure. Processing unit 820 can also be a combination that implements computing functionality, e.g., comprising one or more microprocessor combinations, a combination of DSPs and microprocessors, etc. The communication unit 830 may be a communication interface, a transceiver, a transceiving circuit, etc., and the storage unit 810 may be a memory. When the processing unit 820 is a processor, the communication unit 830 is a communication interface, and the storage unit 810 is a memory, the received signal strength correction device 800 for an ultra-wideband signal according to the embodiment of the present application may be an electronic device shown in fig. 9.
In particular, the processing unit 820 is configured to perform any of the steps performed by the electronic device in the above-described method embodiments, and when performing data transmission such as sending, the communication unit 830 is optionally invoked to complete the corresponding operation. The following is a detailed description.
The processing unit 820 is configured to: when receiving the ultra-bandwidth UWB signal, obtaining a channel impulse response for the UWB signal; determining a first power parameter and a second power parameter according to the channel impulse response, wherein the first power parameter is used for representing the total power value of the channel impulse response, and the second power parameter is used for representing the power value of the line-of-sight transmission in the channel impulse response; determining a first ratio parameter according to the first power parameter and the second power parameter, wherein the first ratio parameter is used for representing the proportion of multipath components in the UWB signal to the UWB signal; and determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by using the correction function.
It can be seen that in the embodiment of the present application, by receiving a UWB signal and acquiring a channel impulse response for the UWB signal; then, determining a first power parameter and a second power parameter according to the channel impulse response, and determining a first ratio parameter according to the first power parameter and the second power parameter; and finally, determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by utilizing the correction function. Because the first power parameter is used for representing the total power value of the channel impulse response and the second power parameter is used for representing the power value of the line-of-sight transmission in the channel impulse response, the application determines the proportion of the multipath component in the UWB signal to the UWB signal according to the total power value of the channel impulse response corresponding to the UWB signal and the power value of the line-of-sight transmission in the channel impulse response corresponding to the UWB signal, and determines the correction function for correcting the received signal strength of the UWB signal according to the proportion, thereby realizing correction of the received signal strength of the UWB signal by the correction function, being beneficial to ensuring that the received signal strength of the corrected UWB signal is more accurate and the error between the received signal strength of the corrected UWB signal and the actual received signal strength is smaller.
In one possible example, in determining the first power parameter and the second power parameter from the channel impulse response, the processing unit 820 has means for: acquiring a starting position of apparent distance transmission in a channel impulse response; starting from the initial position of video transmission, sequentially performing amplitude sampling on channel impulse response to obtain M amplitude sampling values which are sequentially arranged, wherein M is an integer; and determining a first power parameter and a second power parameter according to the M amplitude sampling values.
In one possible example, the processing unit 820 is specifically configured to, in determining the first power parameter and the second functional parameter from M amplitude sample values: acquiring the first N amplitude sampling values in M amplitude sampling values, wherein N is an integer smaller than or equal to M; determining a first power parameter according to all amplitude sampling values in the M amplitude sampling values; a second power parameter is determined from the first N amplitude sample values.
In one possible example, the processing unit 820 is specifically configured to, in determining the first ratio parameter from the first power parameter and the second power parameter: calculating a difference between the first power parameter and the second power parameter to obtain a first difference parameter; a ratio between the first difference parameter and the first power parameter is calculated to obtain a first ratio parameter.
In one possible example, the correction function includes a first correction function or a second correction function; in determining the correction function according to the first ratio parameter, the processing unit 820 is specifically configured to: if the first ratio parameter is larger than a first preset threshold value, determining the correction function as a first correction function; or if the first ratio parameter is smaller than or equal to the first preset threshold value, determining the correction function as a second correction function.
In one possible example, the first correction function and the second correction function are specific piecewise functions; the first correction function satisfies the following formula:
wherein f 1 (x) Representing a first modified function, x representing the received signal strength of the UWB signal, x 0 Represents a second preset threshold, g 1 (x) And p 1 (x) Representing a preset function;
the second correction function satisfies the following formula:
wherein f 2 (x) Watch (watch)Showing a second modified function, x representing the received signal strength of the UWB signal, x 0 Represents a second preset threshold, g 2 (x) And p 2 (x) Representing a preset function.
In one possible example, the electronic device includes a UWB module; upon receiving an ultrawide UWB signal, the processing unit 820 is specifically configured to, in acquiring a channel impulse response for the UWB signal: upon receipt of the UWB signal by the UWB module, a channel impulse response is acquired from the UWB module for the UWB signal.
The following describes a schematic structural diagram of still another electronic device provided in an embodiment of the present application, as shown in fig. 9. The electronic device 900 includes a processor 910, a memory 920, a communication interface 930, and at least one communication bus for connecting the processor 910, the memory 920, and the communication interface 930.
Processor 910 may be one or more Central Processing Units (CPUs). In the case where the processor 910 is a CPU, the CPU may be a single-core CPU or a multi-core CPU. Memory 920 includes, but is not limited to, random access Memory (Random Access Memory, RAM), read-Only Memory (ROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), or portable Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM), and Memory 920 is used for related instructions and data. The communication interface 930 is used to receive and transmit data.
The processor 910 in the electronic device 900 is configured to read one or more programs 921 stored in the memory 920 to perform the following operations: when receiving the ultra-bandwidth UWB signal, obtaining a channel impulse response for the UWB signal; determining a first power parameter and a second power parameter according to the channel impulse response, wherein the first power parameter is used for representing the total power value of the channel impulse response, and the second power parameter is used for representing the power value of the line-of-sight transmission in the channel impulse response; determining a first ratio parameter according to the first power parameter and the second power parameter, wherein the first ratio parameter is used for representing the proportion of multipath components in the UWB signal to the UWB signal; and determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by using the correction function.
It should be noted that, the specific implementation of each operation may be described in the foregoing method embodiment shown in fig. 5 or fig. 7, and the electronic device 900 may be used to execute the technical solution of the foregoing method embodiment of the present application, which is not described herein again.
The present application also provides a computer-readable storage medium storing a computer program for electronic data exchange, the computer program being operable to cause a computer to perform part or all of the steps of any one of the methods described in the method embodiments above.
Embodiments of the present application also provide a computer program product, wherein the computer program product comprises a computer program operable to cause a computer to perform part or all of the steps of any one of the methods described in the method embodiments above. The computer program product may be a software installation package.
For the purposes of simplicity of explanation, the various method embodiments described above are depicted as a series of acts in combination. It will be appreciated by persons skilled in the art that the application is not limited by the order of acts described, as some steps in embodiments of the application may be performed in other orders or concurrently. Moreover, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred embodiments, and that the acts and modules referred to are not necessarily required in the present embodiments.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In several embodiments provided by the present application, it should be appreciated by those skilled in the art that the described apparatus may be implemented in other ways. It will be appreciated that the above described apparatus embodiments are merely illustrative. For example, the above-described division of units is only one logical function division, and there may be another division manner in practice. That is, multiple units or components may be combined or integrated into another piece of software, and some features may be omitted or not performed. Further, the illustrated or discussed coupling, direct coupling, or communication connection may be through some interface, device, or unit, or may be in electrical or other form.
The units described above as separate components may or may not be physically separate. The components shown as units may be physical units, or may not be located on one network unit, or may be distributed to a plurality of network units. Accordingly, the above embodiments may be implemented by selecting some or all of the units according to actual needs.
In addition, each functional unit in each embodiment may be integrated in one processing unit, may exist in different physical units, or two or more functional units may be integrated in one physical unit. The above units may be implemented in hardware or in software functional units.
The above units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable memory. It will be appreciated that the technical solution of the application, which contributes to the prior art or all or part of the technical solution, may be embodied in the form of a computer software product. The computer software product is stored in a memory and includes instructions for causing a computer device (personal computer, server, network device, etc.) to perform all or part of the steps of an embodiment of the application. The memory includes various media capable of storing program codes, such as a usb disk, a ROM, a RAM, a removable hard disk, a magnetic disk, and an optical disk.
Those skilled in the art will appreciate that all or part of the steps of embodiments of the application may be performed by a program to instruct related hardware, and the program may be stored in a memory, where the memory may include a flash disk, a ROM, a RAM, a magnetic disk, an optical disk, or the like.
The foregoing describes in detail embodiments of the present application only for aiding in the understanding of the method of the present application and its core ideas. Those skilled in the art will appreciate that the embodiments of the application vary from one embodiment to another and from one application to another, and so forth, the present disclosure should not be construed as limiting the application.
Claims (10)
1. A received signal strength correction method of ultra-bandwidth signals is characterized by being applied to electronic equipment; the method comprises the following steps:
when receiving an ultra-bandwidth UWB signal, acquiring a channel impulse response for the UWB signal;
determining a first power parameter and a second power parameter according to the channel impulse response, wherein the first power parameter is used for representing the total power value of the channel impulse response, and the second power parameter is used for representing the power value of the range transmission in the channel impulse response;
determining a first ratio parameter according to the first power parameter and the second power parameter, wherein the first ratio parameter is used for representing the proportion of multipath components in the UWB signal to the UWB signal;
and determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by utilizing the correction function.
2. The method of claim 1, wherein said determining a first power parameter and a second power parameter from said channel impulse response comprises:
acquiring a starting position of the apparent distance transmission in the channel impulse response;
starting from the initial position of the line-of-sight transmission, sequentially performing amplitude sampling on the channel impulse response to obtain M amplitude sampling values which are sequentially arranged, wherein M is an integer;
and determining the first power parameter and the second power parameter according to the M amplitude sampling values.
3. The method of claim 2, wherein said determining said first power parameter and said second power parameter from said M amplitude sample values comprises:
acquiring first N amplitude sampling values in the M amplitude sampling values, wherein N is an integer smaller than or equal to M;
determining the first power parameter according to all amplitude sampling values in the M amplitude sampling values;
and determining the second power parameter according to the first N amplitude sampling values.
4. The method of claim 1, wherein said determining a first ratio parameter from said first power parameter and said second power parameter comprises:
Calculating a difference between the first power parameter and the second power parameter to obtain a first difference parameter;
and calculating the ratio between the first difference parameter and the first power parameter to obtain the first ratio parameter.
5. The method of claim 1, wherein the correction function comprises a first correction function or a second correction function; the determining a correction function according to the first ratio parameter includes:
if the first ratio parameter is larger than a first preset threshold value, determining the correction function as the first correction function; or,
and if the first ratio parameter is smaller than or equal to the first preset threshold value, determining the correction function as the second correction function.
6. The method of claim 5, wherein the first correction function and the second correction function are specific piecewise functions; the first correction function satisfies the following formula:
wherein said f 1 (x) Representing the first modified function, the x representing the received signal strength of the UWB signal, the x 0 Representing a second preset threshold, g 1 (x) And said p 1 (x) Representing a preset function;
the second correction function satisfies the following formula:
Wherein said f 2 (x) Representing the second modified function, the x representing the received signal strength of the UWB signal, the x 0 Representing the second preset threshold, g 2 (x) And said p 2 (x) Representing a preset function.
7. The method of any of claims 1-6, wherein the electronic device comprises a UWB module; the step of obtaining a channel impulse response for the UWB signal when the ultra-bandwidth UWB signal is received comprises the following steps:
the channel impulse response from the UWB module for the UWB signal is acquired when the UWB signal is received by the UWB module.
8. The received signal strength correction device of the ultra-bandwidth signal is characterized by being applied to electronic equipment; the device comprises a processing unit and a communication unit, wherein the processing unit is used for:
when the communication unit receives an ultra-bandwidth UWB signal, acquiring a channel impulse response aiming at the UWB signal;
determining a first power parameter and a second power parameter according to the channel impulse response, wherein the first power parameter is used for representing the total power value of the channel impulse response, and the second power parameter is used for representing the power value of the range transmission in the channel impulse response;
Determining a first ratio parameter according to the first power parameter and the second power parameter, wherein the first ratio parameter is used for representing the proportion of multipath components in the UWB signal to the UWB signal;
and determining a correction function according to the first ratio parameter, and correcting the received signal strength of the UWB signal by utilizing the correction function.
9. An electronic device comprising a processor, a memory, and a communication interface, the memory storing one or more programs, and the one or more programs being executed by the processor, the one or more programs comprising instructions for performing the steps of the method of any of claims 1-7.
10. A computer readable storage medium storing a computer program for electronic data exchange, wherein the computer program is operable to cause a computer to perform the method of any one of claims 1-7.
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| WO2019202000A1 (en) * | 2018-04-20 | 2019-10-24 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Interference detection and suppression in non-coordinated systems |
| CN110545164A (en) * | 2018-05-28 | 2019-12-06 | 华为技术有限公司 | Method and apparatus for interference indication in a communication system |
| WO2020010558A1 (en) * | 2018-07-12 | 2020-01-16 | 罗伯特·博世有限公司 | Detection method and detection apparatus |
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