CN117318857A - Wireless signal measurement method, detection equipment and system - Google Patents
Wireless signal measurement method, detection equipment and system Download PDFInfo
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- CN117318857A CN117318857A CN202311194527.8A CN202311194527A CN117318857A CN 117318857 A CN117318857 A CN 117318857A CN 202311194527 A CN202311194527 A CN 202311194527A CN 117318857 A CN117318857 A CN 117318857A
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- 238000001514 detection method Methods 0.000 title claims abstract description 33
- 238000000691 measurement method Methods 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000005259 measurement Methods 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000012549 training Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 3
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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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
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Abstract
The invention discloses a wireless signal measurement method, detection equipment and a system, which are applied to the detection equipment, wherein the method comprises the following steps: measuring a wireless reception signal; the wireless receiving signals comprise wireless transmitting signals and total noise of the wireless receiving signals; determining total noise of a wireless receiving signal according to a wireless transmitting signal, and calculating power of the total noise of the wireless receiving signal; measuring the noise power of a receiver under a preset condition, and estimating the noise of the receiver according to the power of the total noise of the wireless receiving signals and the noise power of the receiver; and calculating the noise-reduced wireless signal based on the wireless receiving signal and the noise of the receiver. The invention can quickly and accurately estimate the noise in the wireless signal and accurately measure the wireless signal.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a wireless signal measurement method, detection device, and system.
Background
In the measurement of wireless signals, noise interference has a considerable influence on the accuracy of signal measurement. When noise interference exists, signal measurement errors are large easily, and signal detection and recognition accuracy is low. In the conventional noise reduction process, at least two measurement paths are required for measurement, at least two measurement signals are obtained, and the two measurement signals are processed, so that noise in the measurement signals is removed. But this approach requires a lot of hardware investment.
How to accurately estimate noise from a wireless received signal with less hardware investment and further measure the wireless signal is an urgent problem to be solved.
Disclosure of Invention
According to one aspect of the invention, a wireless signal measuring method, a wireless signal detecting device and a wireless signal measuring system are provided, so that the noise in the wireless signal can be rapidly and accurately estimated, and the wireless signal can be accurately measured.
In a first aspect, the present invention discloses a wireless signal measurement method, applied to a detection device, the method comprising the steps of:
measuring a wireless reception signal; the wireless receiving signals comprise wireless transmitting signals and total noise of the wireless receiving signals;
determining total noise of the wireless receiving signals according to the wireless transmitting signals, and calculating power of the total noise of the wireless receiving signals;
measuring the noise power of a receiver under a preset condition, and estimating the noise of the receiver according to the power of the total noise of the wireless received signals and the noise power of the receiver;
and calculating the noise-reduced wireless signal based on the wireless receiving signal and the noise of the receiver.
In some embodiments, estimating receiver noise from the power of the total noise of the wireless received signal and the noise power of the receiver comprises the steps of:
defining an intermediate variable, and enabling the square of the intermediate variable to be equal to the ratio of the noise power of the receiver to the power of the total noise of the wireless receiving signal at the moment;
from the intermediate variables, the receiver noise at that time is estimated.
In some embodiments, the receiver noise at the current time is estimated based on an intermediate variable, specifically,
wherein,k is an intermediate variable, and n (i) is the total noise of the radio reception signal.
In some embodiments, determining the total noise of the wireless received signal from the wireless transmitted signal, calculating the power of the total noise of the wireless received signal, comprises the steps of:
acquiring a wireless transmitting signal, and removing the wireless transmitting signal from a wireless receiving signal to obtain total noise of the wireless receiving signal;
and calculating the power of the total noise according to a noise power calculation formula.
In some embodiments, the wireless transmit signal is a known training sequence, an estimated sequence that is decoded by receiver borrowing after passing a CRC check, or an estimated sequence that is repeatedly transmitted and noise reduced.
In some embodiments, the noise power of the receiver, in particular the noise power of the receiver without signal input, is preset.
In some embodiments, the noise-reduced wireless signal is calculated based on the wireless received signal and receiver noise, and in particular,
the noise-reduced wireless signal is the wireless received signal minus the receiver noise.
In a second aspect, the present invention discloses a detection apparatus, the detection apparatus comprising:
a memory storing executable program code;
a processor coupled to the memory;
the processor invokes executable program code stored in the memory to perform a wireless signal measurement method as in any one of the hands.
In a third aspect, the present invention discloses a wireless signal measurement system, comprising a detection device and a wireless communication device;
the wireless communication device sends out a wireless signal;
the detection equipment receives and measures wireless receiving signals, wherein the wireless receiving signals comprise wireless transmitting signals and total noise of the wireless receiving signals;
the detection equipment determines total noise of the wireless receiving signals according to the wireless transmitting signals, and calculates power of the total noise of the wireless receiving signals;
the detection equipment measures the noise power of the receiver under the preset condition, and estimates the noise of the receiver according to the power of the total noise of the wireless received signals and the noise power of the receiver; and calculating the noise-reduced wireless signal based on the wireless receiving signal and the noise of the receiver.
The application discloses a wireless signal measurement method, detection equipment and a system, which are used for measuring wireless receiving signals and total noise, measuring the noise power of a wireless receiver, estimating the noise of the wireless receiver, subtracting the estimated noise of the wireless receiver from the wireless receiving signals containing noise, realizing rapid and accurate estimation of the noise in the wireless signals, accurately measuring the noise-reduced wireless signals, improving the measurement precision of the wireless signals and facilitating calculation of various radio frequency measurement parameters.
Drawings
FIG. 1 is a schematic flow chart of a first embodiment of the present invention;
fig. 2 is a schematic diagram of a wireless signal transmission process according to a first embodiment of the present invention.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the element defined by the phrase "comprising one … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element, and furthermore, elements having the same name in different embodiments of the present application may have the same meaning or may have different meanings, a particular meaning of which is to be determined by its interpretation in this particular embodiment or by further combining the context of this particular embodiment.
It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or," "and/or," "including at least one of," and the like, as used herein, may be construed as inclusive, or meaning any one or any combination. An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.
It should be understood that, although the steps in the flowcharts in the embodiments of the present application are shown in order as indicated by the arrows, these steps are not necessarily performed in order as indicated by the arrows. The steps are not strictly limited in order and may be performed in other orders, unless explicitly stated herein. Moreover, at least some of the steps in the figures may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, the order of their execution not necessarily occurring in sequence, but may be performed alternately or alternately with other steps or at least a portion of the other steps or stages.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The application provides a wireless signal measuring method, a detecting device and a system, which can quickly and accurately estimate noise in wireless signals and accurately measure the wireless signals.
Example 1
As shown in fig. 1, the present embodiment provides a wireless signal measurement method, which is applied to a detection device, where the detection device refers to a terminal capable of receiving and measuring a wireless received signal. Such as a receiver or an intelligent terminal with receiving and measuring functions.
The method comprises the following steps:
s1, measuring a wireless receiving signal; the wireless receiving signal comprises a wireless transmitting signal and total noise of the wireless receiving signal.
Fig. 2 is a schematic diagram of a wireless signal transmission process. The signal source is sent out by the transmitter, and the wireless signal is transmitted by the channel and received by the receiver. The wireless receiving signals received by the detection device comprise wireless transmitting signals transmitted by the signal source and total noise of the wireless receiving signals in the transmission process, wherein the total noise of the wireless receiving signals comprises transmitter noise, environment noise of a channel and receiver noise.
Definition of the Wireless receive Signal y (i)
y(i)＝x(i)+n(i),i＝0,1,…,M-1
Where i is the sampling time (time instant), M represents the length of the signal sequence being processed; x (i) is a wireless transmission signal, and n (i) is a wireless reception signal total noise.
The total noise n (i) of the radio received signal includes the transmitter noise n t (i) Ambient external noise n e (i) And receiver noise n r (i) Is not limited, is a total noise of:
n(i)＝n t (i)+n e (i)+n r (i)
and S2, determining total noise of the wireless receiving signals according to the wireless transmitting signals, and calculating power of the total noise of the wireless receiving signals.
Specifically, the method comprises the following steps:
and S21, acquiring a wireless transmitting signal, and removing the wireless transmitting signal from the wireless receiving signal to obtain the total noise of the wireless receiving signal.
In some cases, the wireless transmission signal is a known training sequence, i.e. a sequence agreed in advance by the transmitter and the receiver, and the training sequence can be obtained directly. More, the wireless transmitting signal is an unknown sequence which is only transmitted once, and the estimated sequence is obtained through borrowing and decoding of a receiver after the CRC check is passed. When the wireless transmitting signal is an unknown sequence which is transmitted for a plurality of times, the estimated sequence without noise can be obtained through repeated transmission for a plurality of times and average denoising. The estimated sequence obtained by average denoising, although still having partial residual noise, can affect the subsequent measurement accuracy. If the average frequency is larger, the denoising effect is better, the residual noise is smaller, and the influence on the measurement accuracy is smaller. In the present application, only the average denoising number needs to be large enough, and the influence on the measurement accuracy is negligible.
Step S22, calculating the power of the total noise according to a noise power calculation formula.
The total power of the noise is the noise n of the transmitter t (i) Power, ambient external noise n e (i) Power and receiver noise n r (i) The sum of the powers is
P n ＝P t +P e +P r 。
S3, measuring the noise power of the receiver under the preset condition, and estimating the noise of the receiver according to the power of the total noise of the wireless receiving signals and the noise power of the receiver;
the noise power of the receiver under the preset condition is measured, wherein the noise power of the receiver under the preset condition refers to the noise power of the receiver when no signal is input. The receiver connects to the end connector, forbids the external signal input, thus measure the noise power of the receiver itself.
Estimating receiver noise from the power of the total noise of the wireless received signal and the noise power of the receiver, comprising the steps of:
defining an intermediate variable, and enabling the square of the intermediate variable to be equal to the power ratio of the noise power of the receiver at the current moment to the total noise of the wireless receiving signal;
from the intermediate variables, the receiver noise at that time is estimated.
The intermediate variable is defined as k, representing the open square of the power ratio of receiver noise to total noise, such that
After obtaining the intermediate variable k, estimating the receiver noise at the moment according to the power ratio of the receiver noise to the total noise, and estimating the receiver noise at the moment, wherein the receiver noise at the moment is approximately the intermediate variable k multiplied by the total noise at the moment:
wherein,n (i) is the total noise of the radio reception signal, which is an estimated value of the receiver noise at this time.
And S4, calculating the noise-reduced wireless signal based on the wireless receiving signal and the noise of the receiver.
Subtracting the receiver noise at that time estimated in step S3 from the wireless received signal
And obtaining a noise-reduced wireless signal z (i). The wireless signal can be used for calculating various radio frequency parameters such as power frequency deviation, modulation characteristics and the like, so that the accuracy of radio frequency parameter calculation is improved.
Example two
Based on the same inventive idea, the present application also provides a detection device comprising:
a memory storing executable program code;
a processor coupled to the memory;
the processor invokes the executable program code stored in the memory to perform a wireless signal measurement method as described in embodiment one.
The specific implementation process of the detection device is the same as that of the above embodiment, and will not be described herein.
Example III
Based on the same inventive concept, the application also provides a wireless signal measurement system, which comprises a detection device and a wireless communication device; the detection device is in wireless connection with the wireless communication device, and specifically comprises the following steps:
the wireless communication device sends out a wireless signal;
the detection equipment receives and measures wireless receiving signals, wherein the wireless receiving signals comprise wireless transmitting signals and total noise of the wireless receiving signals;
the detection equipment determines total noise of the wireless receiving signals according to the wireless transmitting signals, and calculates power of the total noise of the wireless receiving signals;
the detection equipment measures the noise power of the receiver under the preset condition, and estimates the noise of the receiver according to the power of the total noise of the wireless received signals and the noise power of the receiver; and calculating the noise-reduced wireless signal based on the wireless receiving signal and the noise of the receiver.
The specific implementation process of the system is the same as that of the above embodiment, and will not be described herein.
The invention provides a wireless signal measuring method, detecting equipment and a system, which are used for measuring wireless receiving signals and total noise, measuring the noise power of a wireless receiver, estimating the noise of the wireless receiver, subtracting the estimated noise of the wireless receiver from the wireless receiving signals containing noise, realizing rapid and accurate estimation of the noise in the wireless signals, accurately measuring the noise-reduced wireless signals, improving the measuring precision of the wireless signals and being convenient for calculating various radio frequency measuring parameters.
Based on the same inventive idea, the present application also provides an apparatus, which may comprise: a memory storing executable program code;
a processor coupled to the memory;
a transceiver for communicating with other devices or a communication network, receiving or transmitting network messages;
and a bus for connecting the memory, the processor and the transceiver for internal communication.
The transceiver receives the message transmitted from the network, and transmits the message to the processor through the bus, and the processor calls the executable program code stored in the memory through the bus to process the message, and transmits the processing result to the transceiver through the bus to send the processing result, so as to implement the method provided by the first embodiment of the application.
The present invention discloses a computer-readable storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer to execute a wireless signal measurement method described.
The present invention discloses a computer program product comprising a non-transitory computer readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform a wireless signal measurement method as described.
The embodiments described above are illustrative only, in which the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical, may be located in one place, or may be distributed over multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above detailed description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product that may be stored in a computer-readable storage medium including Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic disc Memory, tape Memory, or any other medium that can be used for computer-readable carrying or storing data.
The foregoing are merely some embodiments of the invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.
Claims (9)
1. A wireless signal measurement method, characterized in that it is applied to a detection device, the method comprising the steps of:
measuring a wireless reception signal; the wireless receiving signals comprise wireless transmitting signals and total noise of the wireless receiving signals;
determining total noise of a wireless receiving signal according to a wireless transmitting signal, and calculating power of the total noise of the wireless receiving signal;
measuring the noise power of a receiver under a preset condition, and estimating the noise of the receiver according to the power of the total noise of the wireless receiving signals and the noise power of the receiver;
and calculating the noise-reduced wireless signal based on the wireless receiving signal and the noise of the receiver.
2. The method of claim 1, wherein estimating the receiver noise based on the power of the total noise of the wireless received signal and the noise power of the receiver comprises the steps of:
defining an intermediate variable, and enabling the square of the intermediate variable to be equal to the ratio of the noise power of the receiver to the power of the total noise of the wireless receiving signal at the current moment;
and estimating the receiver noise at the moment according to the intermediate variable.
3. A method for measuring a radio signal according to claim 2, characterized in that the receiver noise at that moment is estimated on the basis of the intermediate variable, in particular,
wherein,k is an intermediate variable, and n (i) is total noise of the radio reception signal.
4. The method for measuring wireless signals according to claim 2, wherein the total noise of the wireless reception signals is determined based on the wireless transmission signals, and the power of the total noise of the wireless reception signals is calculated, comprising the steps of:
acquiring a wireless transmitting signal, and removing the wireless transmitting signal from a wireless receiving signal to obtain total noise of the wireless receiving signal;
and calculating the power of the total noise according to a noise power calculation formula.
5. A radio signal measuring method according to claim 3, wherein the radio transmission signal is a known training sequence, an estimated sequence obtained by the receiver borrowing decoding after passing the CRC check, or an estimated sequence subjected to repeated transmission and noise reduction processing.
6. A method according to claim 3, characterized in that the noise power of the receiver, in particular the noise power of the receiver without signal input, is preset.
7. The method according to claim 1, wherein the noise-reduced wireless signal is calculated based on the wireless reception signal and receiver noise, in particular,
the noise-reduced wireless signal is the wireless received signal minus the receiver noise.
8. A detection apparatus, characterized in that the detection apparatus comprises:
a memory storing executable program code;
a processor coupled to the memory;
the processor invokes the executable program code stored in the memory to perform a wireless signal measurement method according to any one of claims 1-7.
9. A wireless signal measurement system comprising a detection device and a wireless communication device;
the wireless communication device sends out a wireless signal;
the detection equipment receives and measures wireless receiving signals, wherein the wireless receiving signals comprise wireless transmitting signals and total noise of the wireless receiving signals;
the detection equipment determines total noise of a wireless receiving signal according to the wireless transmitting signal, and calculates the power of the total noise of the wireless receiving signal;
the detection equipment measures the noise power of the receiver under the preset condition, and estimates the noise of the receiver according to the power of the total noise of the wireless receiving signals and the noise power of the receiver; and calculating the noise-reduced wireless signal based on the wireless receiving signal and the noise of the receiver.
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