CN116209061B - Method and device for determining signal transmission power in ultra-wideband positioning - Google Patents
Method and device for determining signal transmission power in ultra-wideband positioning Download PDFInfo
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- CN116209061B CN116209061B CN202310472748.0A CN202310472748A CN116209061B CN 116209061 B CN116209061 B CN 116209061B CN 202310472748 A CN202310472748 A CN 202310472748A CN 116209061 B CN116209061 B CN 116209061B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The disclosure provides a method and a device for determining signal transmission power in ultra-wideband positioning, which relate to the technical field of artificial intelligence and comprise the following steps: when the signal transmission power of a transmitting antenna of the ultra-wideband signal is the lowest value, the first signal intensity and the first position received by each receiving antenna are obtained; gradually increasing the power of the transmitting antenna from the lowest value to a preset power upper limit value according to a designated increasing step length, and recording the second signal strength and the second position of each receiving antenna for receiving the ultra-wideband signal each time; determining a positioning precision change curve according to the first signal intensity, the first position, the second signal intensity and the second position; acquiring the signal-to-noise ratio of each receiving antenna for receiving the ultra-wideband signal each time, and determining a signal-to-noise ratio change curve; and determining the transmission power of the target signal according to the positioning accuracy change curve and the signal-to-noise ratio change curve. The finally determined target signal transmission power can simultaneously meet the targets with high signal-to-noise ratio and high positioning accuracy.
Description
Technical Field
The disclosure relates to the technical field of artificial intelligence, and in particular relates to a method and a device for determining signal transmission power in ultra-wideband positioning.
Background
In ultra-wideband positioning, the magnitude of signal transmission power can directly influence the strength of a signal received by a receiving antenna, thereby influencing positioning accuracy. If the signal transmission power is too small, the receiving antenna may not receive a signal with sufficient strength, which results in a decrease in positioning accuracy, and if the signal transmission power is too large, problems such as signal overlapping and interference may be caused, which also affects positioning accuracy.
Therefore, how to improve the positioning accuracy of the ultra wideband positioning result in the long and narrow space scene by controlling the signal transmission power is a problem to be solved at present.
Disclosure of Invention
The present disclosure aims to solve, at least to some extent, one of the technical problems in the related art.
An embodiment of a first aspect of the present disclosure provides a method for determining signal transmission power in ultra-wideband positioning, including:
when the signal transmission power of a transmitting antenna of the ultra-wideband signal is the lowest value, the first signal intensity and the first position received by each receiving antenna are obtained;
gradually increasing the power of the transmitting antenna from a lowest value to a preset power upper limit value according to a specified increasing step length, and recording the second signal strength and the second position of each receiving antenna for receiving the ultra-wideband signal each time, wherein the power upper limit value corresponds to the current positioning environment;
Determining a positioning precision change curve corresponding to a target power range according to the first signal intensity and the first position and the second signal intensity and the second position;
acquiring the signal-to-noise ratio of each receiving antenna for receiving the ultra-wideband signal each time, and determining a signal-to-noise ratio change curve corresponding to the target power range;
and determining the transmission power of the target signal according to the positioning precision change curve and the signal-to-noise ratio change curve.
An embodiment of a second aspect of the present disclosure provides a device for determining signal transmission power in ultra-wideband positioning, including:
the first acquisition module is used for acquiring the first signal intensity and the first position received by each receiving antenna when the signal transmission power of the transmitting antenna of the ultra-wideband signal is the lowest value;
the recording module is used for gradually increasing the power of the transmitting antenna from a lowest value to a preset power upper limit value according to a specified increasing step length, and recording the second signal strength and the second position of each receiving antenna which receives the ultra-wideband signal each time, wherein the power upper limit value corresponds to the current positioning environment;
the first determining module is used for determining a positioning precision change curve corresponding to the target power range according to the first signal intensity and the first position and the second signal intensity and the second position;
The second acquisition module is used for acquiring the signal-to-noise ratio of each receiving antenna for receiving the ultra-wideband signal each time and determining a signal-to-noise ratio change curve corresponding to the target power range;
and the second determining module is used for determining the transmission power of the target signal according to the positioning precision change curve and the signal-to-noise ratio change curve.
An embodiment of a third aspect of the present disclosure provides an electronic device, including: the system comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor realizes the method for determining the signal transmission power in the ultra-wideband positioning according to the embodiment of the first aspect of the present disclosure when executing the program.
An embodiment of a fourth aspect of the present disclosure proposes a non-transitory computer readable storage medium storing a computer program which, when executed by a processor, implements a method for determining signal transmission power in ultra wideband positioning as proposed by an embodiment of the first aspect of the present disclosure.
The method, the device, the equipment and the storage medium for determining the signal transmission power in ultra-wideband positioning have the following beneficial effects:
in the embodiment of the disclosure, when the signal transmission power of a transmitting antenna of an ultra-wideband signal is the lowest value, the device firstly obtains a first signal intensity and a first position received by each receiving antenna, then gradually increases the power of the transmitting antenna from the lowest value to a predetermined power upper limit value according to a specified increasing step length, and records a second signal intensity and a second position of each receiving antenna which each receives the ultra-wideband signal, wherein the power upper limit value corresponds to a current positioning environment, then determines a positioning precision change curve corresponding to a target power range according to the first signal intensity and the first position, and each second signal intensity and the second position, then obtains a signal-to-noise ratio of each receiving antenna which each receives the ultra-wideband signal, determines a signal-to-noise ratio change curve corresponding to the target power range, and finally determines the target signal transmission power according to the positioning precision change curve and the signal-to-noise ratio change curve. Therefore, the signal transmission power can be gradually increased, so that the change of the positioning accuracy is observed, the signal power and the interference are controlled within a certain range, the finally determined target signal transmission power can simultaneously meet the target with high signal-to-noise ratio and high positioning accuracy, multi-target optimization is realized, the accuracy and reliability are realized, and then the ultra-wideband positioning can be performed by using the currently determined target signal transmission power, so that the optimal positioning effect is realized.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a flowchart of a method for determining signal transmission power in ultra wideband positioning according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a device for determining signal transmission power in ultra-wideband positioning according to an embodiment of the present disclosure;
FIG. 3 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present disclosure.
Detailed Description
Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present disclosure and are not to be construed as limiting the present disclosure.
The following describes a method, an apparatus, a computer device, and a storage medium for determining signal transmission power in ultra wideband positioning according to an embodiment of the present disclosure with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method for determining signal transmission power in ultra wideband positioning according to an embodiment of the present disclosure.
As shown in fig. 1, the method for determining signal transmission power in ultra-wideband positioning may include the following steps:
step 101, when the signal transmission power of the transmitting antenna of the ultra-wideband signal is the lowest value, the first signal intensity and the first position received by each receiving antenna are obtained.
The number of the transmitting antennas may be one or may be plural, for example, 2. The number of the receiving antennas may be plural, for example, 4, or 6, wherein the receiving antennas are located in a specified range around the transmitting antennas. It can be appreciated that by increasing the number of transmit antennas and receive antennas, signal coverage and multipath effects can be improved, thereby increasing positioning accuracy.
The minimum and maximum values (upper power limit values) of the signal transmission power of the transmitting antenna are generally determined by a plurality of factors, such as the communication technology used, bandwidth, distance, obstacles, environment, and the like. In practice, it is necessary to comply with the respective regulations and standards to determine the range of the signal transmission power of the transmitting antenna.
In the embodiment of the disclosure, the minimum value of the signal transmission power of the recommended transmitting antenna is 10 dBm, so as to ensure the stability and reliability of positioning performance. In the absence of any interference sources and obstacles, higher signal transmission power (e.g., 20 dBm or more) can be used to improve the positioning accuracy and coverage of the system, which is particularly required to be evaluated according to actual requirements and application scenarios and to comply with relevant regulations and standards.
The determination of the highest signal power (upper power limit) of a transmitting antenna in ultra-wideband positioning is typically limited by radio frequency regulations and standards promulgated by local spectrum authorities to ensure that it does not interfere with other radios and services. Thus, the highest signal power of the transmitting antenna should comply with local regulations and regulations, and thus the upper power limit may be corresponding to the current positioning environment.
The first signal strength may be the signal strength received by the receiving antenna when the signal transmission power of the transmitting antenna of the ultra-wideband signal is the lowest value. The first position may be a position of the receiving antenna calculated when the signal transmission power of the transmitting antenna of the ultra-wideband signal is the lowest value. It will be appreciated that the transmit antennas may be directional, such as may transmit in three directions A, B, C simultaneously, or may be omni-directional. It will be appreciated that the location of the receive antennas may be fixed in advance and the location of each receive antenna recorded.
Wherein both the first and second locations are determined using ranging based techniques, i.e. the distance between each signal source (transmitting antenna) and the receiver needs to be known. This can be achieved by transmitting the pulse signal sent by the antenna to the receiver and back. If the location of the signal source is known, the location of the receiver can be calculated using ranging techniques.
Step 102, gradually increasing the power of the transmitting antenna from the lowest value to a predetermined power upper limit value according to a specified increasing step length, and recording the second signal strength and the second position of each receiving antenna for each time of receiving the ultra wideband signal, wherein the power upper limit value corresponds to the current positioning environment.
The designated step size may be 5% of the original signal transmission power each time, for example, the minimum value of the signal transmission power is W, the transmission power of the second ultra wideband signal may be (1+5%) W, and the signal transmission power of the third ultra wideband signal may be (1+5%). Times.2w.
It should be noted that, the accuracy of ultra wideband positioning can be improved by increasing the signal transmission power step by step, because as the propagation distance of the signal increases, the signal attenuation increases, and at this time, the effect caused by the signal attenuation can be offset by increasing the signal transmission power, thereby improving the signal receiving strength. Therefore, the time delay can be measured more accurately at the receiving end, and the ultra-wideband positioning accuracy is further improved. However, it should be noted that increasing the signal transmission power gradually may also cause problems such as signal interference and limitation of communication capacity, which need to be comprehensively considered. The signal strength of the transmitting antenna and the receiving antenna has an influence on the accuracy and reliability of ultra wideband positioning. Higher transmit antenna signal strength can improve the range and accuracy of the positioning system, but also can increase the noise and interference of the receive antenna, thereby reducing the accuracy of positioning. In contrast, the higher signal strength of the receiving antenna can improve the sensitivity and the anti-interference capability of the receiving antenna, thereby improving the accuracy of the positioning system. Therefore, when designing and implementing the ultra wideband positioning system, the signal strength of the transmitting antenna and the receiving antenna needs to be comprehensively considered to achieve the optimal positioning performance.
It will be appreciated that by increasing the transmission power of the ultra wideband signal step by step, which may lead to a change in positioning accuracy, the step by step may avoid exceeding the safe power of the device.
And step 103, determining a positioning precision change curve corresponding to the target power range according to the first signal intensity and the first position and the second signal intensity and the second position.
Alternatively, the first position and each second position may be compared with the reference position, a first difference value corresponding to each signal transmission power of the transmitting antenna is determined, then the first signal strength and each second signal strength are compared with the signal strength corresponding to the transmitting antenna, a second difference value corresponding to each signal transmission power of the transmitting antenna is determined, and then a positioning accuracy change curve corresponding to the target power range is determined according to the first difference value corresponding to each signal transmission power and the second difference value. The reference position may be a current position of the receiving antenna. The first location and the second location may be calculated locations of the receiving antennas.
The smaller the first difference value and the second difference value, the higher the positioning accuracy is, namely the attenuation of the signal is less, and the time delay can be measured more accurately at one end of the receiving antenna, so that the ultra-wideband positioning accuracy is improved. The higher signal strength of the receiver can improve the sensitivity and the anti-interference capability of the receiver, thereby improving the accuracy of a positioning system.
Specifically, the first difference value and the second difference value corresponding to each signal transmission power may be normalized to the interval of [0,1 ]. For example, the normalized first difference value a and the normalized second difference value B corresponding to the signal transmission power X are respectively 0.3 and 0.2, then 0.3+0.2 may be added to obtain 0.5, then the corresponding percentage of 0.5 is determined to be 50%, and then 1-50% = 50% is used as the positioning accuracy corresponding to the signal transmission power X. Alternatively, the normalized values of the first difference value a and the second difference value B corresponding to the signal transmission power X may be weighted and added, where the weight corresponding to the first difference value may be 0.8 and the weight corresponding to the second difference value may be 0.2, then 0.3x0.8+0.2x0.2=0.28 may be calculated, then the percentage corresponding to 0.28 is determined to be 28%, and then 1-28% =72% is used as the positioning precision corresponding to the signal transmission power X.
Wherein the target power range may be a range between a minimum value to a power upper limit value.
Further, a positioning accuracy change curve can be generated according to the positioning accuracy corresponding to each signal transmission power in the target power range.
Step 104, obtaining the signal-to-noise ratio of each receiving antenna receiving the ultra wideband signal each time, and determining the signal-to-noise ratio change curve corresponding to the target power range.
Alternatively, the noise temperature corresponding to each receiving antenna and the signal power and the signal bandwidth of each receiving antenna for each receiving the ultra-wideband signal may be first determined, then the noise power of each receiving antenna for each receiving the ultra-wideband signal output port is calculated according to the signal bandwidth and the noise temperature of each receiving antenna for each receiving the ultra-wideband signal, and then each signal power is divided by the corresponding noise power to obtain the signal-to-noise ratio of each receiving antenna for each receiving the ultra-wideband signal.
Wherein the noise temperature and the noise power are related physical quantities. Noise temperature refers to the temperature equivalent to thermal noise generation in one frequency band, typically expressed in kelvin, and noise power refers to the electrical power of noise transmitted in a certain frequency band per unit time, typically expressed in decibel milliwatts. The relationship between them can be described by a cold state equation, i.e. the noise power is equal to the thermal noise power in the frequency band multiplied by the loss and gain factor of the circuit. Determining the noise temperature of the receiving antenna system may be an actual measurement or a theoretical calculation. For example, the noise temperature may be actually measured by disconnecting the receiving antenna and connecting a heat source at its input port. The heat source should have a known temperature and should emit in the same frequency range as the noise temperature. Then, the signal power output from the receiving antenna may be measured, and the noise temperature may be calculated using the relationship between the power and the heat source temperature. For theoretical calculations, the noise temperature may be calculated based on parameters of the various components (e.g., amplifiers, mixers, and filters) and the noise figure. These parameters can be found from a manufacturer-provided data sheet or can be determined experimentally by itself. Finally, the noise figure may be multiplied by a reference temperature (typically 290K) to calculate the noise temperature.
Signal power=10++signal strength/10
Where the unit of received power is typically decibel milliwatts (dBm). The formula is based on the definition of decibel units, where 0 dBm is a reference level of 1 milliwatt power.
For example, if the received signal strength is-70 dBm, then the signal power is:
signal power=10+ (-70/10) =0.00001 milliwatts or-20 dBm.
Where snr=10×log10 (received signal power/noise power)
Where signal power is the power of the received signal, i.e. the square of the signal level, and noise power is the sum of the powers of all non-signal components introduced during reception, usually based on thermal noise.
Wherein noise power=k (tant+tsys) B
Where K is the noise temperature, tant is the equivalent noise temperature of the receiving antenna, tsys is the equivalent noise temperature of the receiving circuit, B is the signal bandwidth of the receiving antenna for each time an ultra-wideband signal is received, K is the boltzmann constant, which is approximately equal to 1.38x10-23J/K, tant and Tsys are in kelvin (K), and B is in hertz (Hz). The higher the signal-to-noise ratio of the received signal, the higher the useful signal duty cycle contained in the representative signal and therefore the less the contribution of noise power to the total power.
And 105, determining the transmission power of the target signal according to the positioning accuracy change curve and the signal-to-noise ratio change curve.
Alternatively, the signal transmission power corresponding to the highest positioning accuracy in the positioning accuracy change curve may be used as the target signal transmission power.
Alternatively, a signal transmission power interval with a signal-to-noise ratio greater than a preset threshold in the signal-to-noise ratio variation curve may be first obtained, a target positioning accuracy variation curve corresponding to the signal transmission power interval may be determined, and the signal transmission power corresponding to the highest positioning accuracy may be determined from the target positioning accuracy variation curve as the target signal transmission power.
Alternatively, calculus may be used to derive two curves, and then a point is found at which the derivatives of the two curves are equal, where the point is the optimal solution for the two curves, and the corresponding signal transmission power is used as the target signal transmission power.
In addition, optimization algorithms may also be used to find the optimal solution. For example, the parameters may be adjusted stepwise using gradient descent, genetic algorithm, etc., until an optimal solution is found.
The preset threshold value can be a preset signal-to-noise ratio threshold value, and it is required to be noted that if the signal-to-noise ratio in the signal-to-noise ratio change curve is greater than the preset threshold value, it is noted that the signal-to-noise ratio is higher at this time, so that the positioning requirement can be met. And then, the positioning precision change curve corresponding to the signal transmission power interval with the signal to noise ratio larger than the preset threshold value can be used as a target positioning precision change curve, and the signal transmission power corresponding to the highest positioning precision is selected from the target positioning precision change curve to be used as the target signal transmission power.
Alternatively, the time of each receiving antenna receiving the ultra wideband signal at each time may be obtained, and based on the time of each corresponding transmitting antenna transmitting the ultra wideband signal, a plurality of relative distances may be calculated, then an error value between each relative distance and a reference distance and a minimum error value of each error value may be determined, and then the signal transmission power of the transmitting antenna corresponding to the minimum error value may be used as the target signal transmission power. The time of each receiving antenna receiving the ultra-wideband signal each time is obtained, the corresponding flight time can be calculated, and then the flight distance of the ultra-wideband signal can be calculated by multiplying the flight time by the wave velocity, so that the relative distance can be determined. Wherein the reference distance is the distance between the current transmit antenna and the receive antenna.
It should be noted that the target signal transmission power corresponds to the distance between the current transmitting antenna and the receiving antenna, and it is understood that different distances may correspond to different signal transmission powers, for example, as the signal propagation distance increases, the signal attenuation also increases, and at this time, increasing the signal transmission power can offset the influence caused by the signal attenuation, so as to improve the signal receiving strength.
In the embodiment of the disclosure, when the signal transmission power of a transmitting antenna of an ultra-wideband signal is the lowest value, the device firstly obtains a first signal intensity and a first position received by each receiving antenna, then gradually increases the power of the transmitting antenna from the lowest value to a predetermined power upper limit value according to a specified increasing step length, and records a second signal intensity and a second position of each receiving antenna which each receives the ultra-wideband signal, wherein the power upper limit value corresponds to a current positioning environment, then determines a positioning precision change curve corresponding to a target power range according to the first signal intensity and the first position, and each second signal intensity and the second position, then obtains a signal-to-noise ratio of each receiving antenna which each receives the ultra-wideband signal, determines a signal-to-noise ratio change curve corresponding to the target power range, and finally determines the target signal transmission power according to the positioning precision change curve and the signal-to-noise ratio change curve. Therefore, the signal transmission power can be gradually increased, so that the change of the positioning accuracy is observed, the signal power and the interference are controlled within a certain range, the finally determined target signal transmission power can simultaneously meet the target with high signal-to-noise ratio and high positioning accuracy, multi-target optimization is realized, the accuracy and reliability are realized, and then the ultra-wideband positioning can be performed by using the currently determined target signal transmission power, so that the optimal positioning effect is realized.
In order to implement the above embodiment, the disclosure further provides a device for determining signal transmission power in ultra-wideband positioning.
Fig. 2 is a block diagram of a signal transmission power determining apparatus in ultra wideband positioning according to a third embodiment of the present disclosure.
As shown in fig. 2, the apparatus 200 for determining signal transmission power in ultra wideband positioning may include:
a first obtaining module 210, configured to obtain, when the signal transmission power of the transmitting antenna of the ultra-wideband signal is the lowest value, a first signal strength and a first position received by each receiving antenna;
a recording module 220, configured to gradually increase the power of the transmitting antenna from a lowest value to a predetermined power upper limit value according to a specified increasing step, and record a second signal strength and a second position of each receiving antenna that each time the receiving antenna receives an ultra wideband signal, where the power upper limit value corresponds to a current positioning environment;
a first determining module 230, configured to determine a positioning accuracy change curve corresponding to the target power range according to the first signal strength and the first position, and the second signal strength and the second position;
a second obtaining module 240, configured to obtain a signal-to-noise ratio of each of the receiving antennas when receiving the ultra wideband signal, and determine a signal-to-noise ratio variation curve corresponding to the target power range;
And a second determining module 250, configured to determine a target signal transmission power according to the positioning accuracy variation curve and the signal-to-noise ratio variation curve.
Optionally, the device further includes:
the third acquisition module is used for acquiring the time of each receiving antenna receiving the ultra-wideband signal each time and calculating a plurality of relative distances based on the corresponding time of each transmitting antenna transmitting the ultra-wideband signal each time;
a third determining module, configured to determine an error value between each of the relative distances and a reference distance, and a minimum error value of the error values;
and a fourth determining module, configured to take the signal transmission power of the transmitting antenna corresponding to the minimum error value as the target signal transmission power.
Optionally, the second obtaining module is specifically configured to:
determining the noise temperature corresponding to each receiving antenna, and the signal power and the signal bandwidth of each receiving antenna for receiving the ultra-wideband signal each time;
according to the signal bandwidth and the noise temperature of each receiving antenna for receiving the ultra-wideband signal, calculating the noise power of each receiving antenna for receiving the ultra-wideband signal output port;
Dividing the signal power by the corresponding noise power to obtain the signal-to-noise ratio of each receiving antenna receiving the ultra-wideband signal.
Optionally, the second determining module is specifically configured to:
taking the signal transmission power corresponding to the highest positioning precision in the positioning precision change curve as the target signal transmission power;
or alternatively, the process may be performed,
and acquiring a signal transmission power interval with the signal to noise ratio larger than a preset threshold in the signal to noise ratio variation curve, determining a target positioning precision variation curve corresponding to the signal transmission power interval, and determining the signal transmission power corresponding to the highest positioning precision from the target positioning precision variation curve as target signal transmission power.
Optionally, the first determining module is specifically configured to:
comparing the first position with each second position and a reference position, and determining a first difference value corresponding to each signal transmission power of the transmitting antenna;
comparing the first signal intensity with the signal intensity corresponding to the transmitting antenna of each second signal intensity, and determining a second difference value corresponding to each signal transmission power of the transmitting antenna;
And determining a positioning precision change curve corresponding to the target power range according to the first difference value corresponding to each signal transmission power and the second difference value.
In the embodiment of the disclosure, when the signal transmission power of a transmitting antenna of an ultra-wideband signal is the lowest value, the device firstly obtains a first signal intensity and a first position received by each receiving antenna, then gradually increases the power of the transmitting antenna from the lowest value to a predetermined power upper limit value according to a specified increasing step length, and records a second signal intensity and a second position of each receiving antenna which each receives the ultra-wideband signal, wherein the power upper limit value corresponds to a current positioning environment, then determines a positioning precision change curve corresponding to a target power range according to the first signal intensity and the first position, and each second signal intensity and the second position, then obtains a signal-to-noise ratio of each receiving antenna which each receives the ultra-wideband signal, determines a signal-to-noise ratio change curve corresponding to the target power range, and finally determines the target signal transmission power according to the positioning precision change curve and the signal-to-noise ratio change curve. Therefore, the signal transmission power can be gradually increased, so that the change of the positioning accuracy is observed, the signal power and the interference are controlled within a certain range, the finally determined target signal transmission power can simultaneously meet the target with high signal-to-noise ratio and high positioning accuracy, multi-target optimization is realized, the accuracy and reliability are realized, and then the ultra-wideband positioning can be performed by using the currently determined target signal transmission power, so that the optimal positioning effect is realized.
To achieve the above embodiments, the present disclosure further proposes a computer device including: the method for determining the signal transmission power in ultra-wideband positioning according to the embodiment of the disclosure is realized when the processor executes the program.
In order to implement the above-mentioned embodiments, the present disclosure further proposes a non-transitory computer readable storage medium storing a computer program, which when executed by a processor implements a method for determining signal transmission power in ultra wideband positioning as proposed in the foregoing embodiments of the present disclosure.
To achieve the above embodiments, the present disclosure also proposes a computer program product which, when executed by an instruction processor in the computer program product, performs a method for determining signal transmission power in ultra wideband positioning as proposed in the foregoing embodiments of the present disclosure.
FIG. 3 illustrates a block diagram of an exemplary computer device suitable for use in implementing embodiments of the present disclosure. The computer device 12 shown in fig. 3 is merely an example and should not be construed as limiting the functionality and scope of use of the disclosed embodiments.
As shown in FIG. 3, computer device 12 is in the form of a general purpose computing device. Components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, a bus 18 that connects the various system components, including the system memory 28 and the processing units 16.
Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, and a local bus using any of a variety of bus architectures. By way of example, and not limitation, such architectures include industry Standard architecture (Industry Standard Architecture; hereinafter ISA) bus, micro channel architecture (Micro Channel Architecture; hereinafter MAC) bus, enhanced ISA bus, video electronics standards Association (Video Electronics Standards Association; hereinafter VESA) local bus, and peripheral component interconnect (Peripheral Component Interconnection; hereinafter PCI) bus.
Computer device 12 typically includes a variety of computer system readable media. Such media can be any available media that is accessible by computer device 12 and includes both volatile and nonvolatile media, removable and non-removable media.
Memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (Random Access Memory; hereinafter: RAM) 30 and/or cache memory 32. The computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from or write to non-removable, nonvolatile magnetic media (not shown in FIG. 3, commonly referred to as a "hard disk drive"). Although not shown in fig. 3, a disk drive for reading from and writing to a removable non-volatile magnetic disk (e.g., a "floppy disk"), and an optical disk drive for reading from or writing to a removable non-volatile optical disk (e.g., a compact disk read only memory (Compact Disc Read Only Memory; hereinafter CD-ROM), digital versatile read only optical disk (Digital Video Disc Read Only Memory; hereinafter DVD-ROM), or other optical media) may be provided. In such cases, each drive may be coupled to bus 18 through one or more data medium interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to carry out the functions of the various embodiments of the disclosure.
A program/utility 40 having a set (at least one) of program modules 42 may be stored in, for example, memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each or some combination of which may include an implementation of a network environment. Program modules 42 generally perform the functions and/or methods in the embodiments described in this disclosure.
The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and/or any devices (e.g., network card, modem, etc.) that enable the computer device 12 to communicate with one or more other computing devices. Such communication may occur through an input/output (I/O) interface 22. Moreover, the computer device 12 may also communicate with one or more networks such as a local area network (Local Area Network; hereinafter LAN), a wide area network (Wide Area Network; hereinafter WAN) and/or a public network such as the Internet via the network adapter 20. As shown, network adapter 20 communicates with other modules of computer device 12 via bus 18. It should be appreciated that although not shown, other hardware and/or software modules may be used in connection with computer device 12, including, but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, data backup storage systems, and the like.
The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, implementing the methods mentioned in the foregoing embodiments.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and additional implementations are included within the scope of the preferred embodiment of the present disclosure in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
Logic and/or steps represented in the flowcharts or otherwise described herein, e.g., a ordered listing of executable instructions for implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.
It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. As with the other embodiments, if implemented in hardware, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.
Those of ordinary skill in the art will appreciate that all or a portion of the steps carried out in the method of the above-described embodiments may be implemented by a program to instruct related hardware, where the program may be stored in a computer readable storage medium, and where the program, when executed, includes one or a combination of the steps of the method embodiments.
Furthermore, each functional unit in the embodiments of the present disclosure may be integrated in one processing module, or each unit may exist alone physically, or two or more units may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules may also be stored in a computer readable storage medium if implemented in the form of software functional modules and sold or used as a stand-alone product.
The above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, or the like. Although embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the present disclosure.
Claims (10)
1. The method for determining the signal transmission power in ultra-wideband positioning is characterized by comprising the following steps:
when the signal transmission power of a transmitting antenna of the ultra-wideband signal is the lowest value, the first signal intensity and the first position received by each receiving antenna are obtained;
gradually increasing the power of the transmitting antenna from a lowest value to a preset power upper limit value according to a specified increasing step length, and recording the second signal strength and the second position of each receiving antenna for receiving the ultra-wideband signal each time, wherein the power upper limit value corresponds to the current positioning environment;
determining a positioning precision change curve corresponding to a target power range according to the first signal intensity and the first position and the second signal intensity and the second position;
Acquiring the signal-to-noise ratio of each receiving antenna for receiving the ultra-wideband signal each time, and determining a signal-to-noise ratio change curve corresponding to the target power range;
and determining the transmission power of the target signal according to the positioning precision change curve and the signal-to-noise ratio change curve.
2. The method as recited in claim 1, further comprising:
acquiring time of each receiving antenna receiving the ultra-wideband signal each time, and calculating a plurality of relative distances based on the corresponding time of each transmitting antenna transmitting the ultra-wideband signal each time;
determining an error value between each of the relative distances and a reference distance, and a minimum error value of the respective error values;
and taking the signal transmission power of the transmitting antenna corresponding to the minimum error value as the target signal transmission power.
3. The method of claim 1, wherein said obtaining a signal-to-noise ratio for each of said receive antennas to receive an ultra wideband signal comprises:
determining the noise temperature corresponding to each receiving antenna, and the signal power and the signal bandwidth of each receiving antenna for receiving the ultra-wideband signal each time;
according to the signal bandwidth and the noise temperature of each receiving antenna for receiving the ultra-wideband signal, calculating the noise power of each receiving antenna for receiving the ultra-wideband signal output port;
Dividing the signal power by the corresponding noise power to obtain the signal-to-noise ratio of each receiving antenna receiving the ultra-wideband signal.
4. The method of claim 1, wherein said determining a target signal transmission power based on said positioning accuracy profile and said signal-to-noise ratio profile comprises:
taking the signal transmission power corresponding to the highest positioning precision in the positioning precision change curve as the target signal transmission power;
or alternatively, the process may be performed,
and acquiring a signal transmission power interval with the signal to noise ratio larger than a preset threshold in the signal to noise ratio variation curve, determining a target positioning precision variation curve corresponding to the signal transmission power interval, and determining the signal transmission power corresponding to the highest positioning precision from the target positioning precision variation curve as target signal transmission power.
5. The method of claim 1, wherein determining a location accuracy profile corresponding to a target power range based on the first signal strength and the first location, and the second signal strength and the second location, respectively, comprises:
comparing the first position with each second position and a reference position, and determining a first difference value corresponding to each signal transmission power of the transmitting antenna;
Comparing the first signal intensity with the signal intensity corresponding to the transmitting antenna of each second signal intensity, and determining a second difference value corresponding to each signal transmission power of the transmitting antenna;
and determining a positioning precision change curve corresponding to the target power range according to the first difference value corresponding to each signal transmission power and the second difference value.
6. A device for determining signal transmission power in ultra-wideband positioning, comprising:
the first acquisition module is used for acquiring the first signal intensity and the first position received by each receiving antenna when the signal transmission power of the transmitting antenna of the ultra-wideband signal is the lowest value;
the recording module is used for gradually increasing the power of the transmitting antenna from a lowest value to a preset power upper limit value according to a specified increasing step length, and recording the second signal strength and the second position of each receiving antenna which receives the ultra-wideband signal each time, wherein the power upper limit value corresponds to the current positioning environment;
the first determining module is used for determining a positioning precision change curve corresponding to the target power range according to the first signal intensity and the first position and the second signal intensity and the second position;
The second acquisition module is used for acquiring the signal-to-noise ratio of each receiving antenna for receiving the ultra-wideband signal each time and determining a signal-to-noise ratio change curve corresponding to the target power range;
and the second determining module is used for determining the transmission power of the target signal according to the positioning precision change curve and the signal-to-noise ratio change curve.
7. The apparatus as recited in claim 6, further comprising:
the third acquisition module is used for acquiring the time of each receiving antenna receiving the ultra-wideband signal each time and calculating a plurality of relative distances based on the corresponding time of each transmitting antenna transmitting the ultra-wideband signal each time;
a third determining module, configured to determine an error value between each of the relative distances and a reference distance, and a minimum error value of the error values;
and a fourth determining module, configured to take the signal transmission power of the transmitting antenna corresponding to the minimum error value as the target signal transmission power.
8. The apparatus of claim 6, wherein the second acquisition module is specifically configured to:
determining the noise temperature corresponding to each receiving antenna, and the signal power and the signal bandwidth of each receiving antenna for receiving the ultra-wideband signal each time;
According to the signal bandwidth and the noise temperature of each receiving antenna for receiving the ultra-wideband signal, calculating the noise power of each receiving antenna for receiving the ultra-wideband signal output port;
dividing the signal power by the corresponding noise power to obtain the signal-to-noise ratio of each receiving antenna receiving the ultra-wideband signal.
9. The apparatus of claim 6, wherein the second determining module is specifically configured to:
taking the signal transmission power corresponding to the highest positioning precision in the positioning precision change curve as the target signal transmission power;
or alternatively, the process may be performed,
and acquiring a signal transmission power interval with the signal to noise ratio larger than a preset threshold in the signal to noise ratio variation curve, determining a target positioning precision variation curve corresponding to the signal transmission power interval, and determining the signal transmission power corresponding to the highest positioning precision from the target positioning precision variation curve as target signal transmission power.
10. The apparatus of claim 6, wherein the first determining module is specifically configured to:
comparing the first position with each second position and a reference position, and determining a first difference value corresponding to each signal transmission power of the transmitting antenna;
Comparing the first signal intensity with the signal intensity corresponding to the transmitting antenna of each second signal intensity, and determining a second difference value corresponding to each signal transmission power of the transmitting antenna;
and determining a positioning precision change curve corresponding to the target power range according to the first difference value corresponding to each signal transmission power and the second difference value.
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| CN114499550A (en) * | 2022-02-24 | 2022-05-13 | Oppo广东移动通信有限公司 | Signal transmission method and device, electronic equipment and storage medium |
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