CN112532328A - Channel characteristic quantization method and device, electronic equipment and storage medium - Google Patents
Channel characteristic quantization method and device, electronic equipment and storage medium Download PDFInfo
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Abstract
The application discloses a channel characteristic quantization method, a device, an electronic device and a computer readable storage medium, comprising: carrying out channel detection by using the channel detection signal to obtain a channel measurement value; carrying out amplitude position preprocessing on the channel measurement value to obtain a preprocessed channel measurement value; the amplitude position preprocessing process is to determine a frequency point position serial number corresponding to an amplitude according to the amplitude of a channel measured value, and take the frequency point position serial number as a preprocessed channel measured value; comparing the preprocessed channel measurement value with a preset threshold value, and quantizing the preprocessed channel measurement value according to a comparison result to obtain a quantization result; and generating an initial key according to the quantization result. The method obtains the initial key by adopting a method based on a position quantization threshold, can effectively remove the influence of environmental noise on the initial key, enhances the correlation of the initial keys of both sides of legal communication, and effectively reduces the inconsistency rate of the initial keys of both sides of legal communication.
Description
Technical Field
The present invention relates to the field of communication security and transmission technologies, and in particular, to a method and an apparatus for channel characteristic quantization, an electronic device, and a computer-readable storage medium.
Background
With the rapid development of wireless communication technology, wireless communication networks enter all corners of our lives, and the life style of people is greatly changed. However, the inherent open nature of electromagnetic waves makes wireless communication inherently vulnerable to hostile attacks, and wireless communication security concerns have received much attention. The physical layer key extraction technology is a key technology in the field of wireless communication physical layer security, extracts a consistent shared session key by using public channel characteristics between two legal communication parties, is used for realizing security strategy schemes such as information encryption, signal scrambling, identity authentication and the like in wireless communication, and effectively improves the wireless communication security performance. Generally, the physical layer key extraction process is mainly divided into four steps, namely channel detection, feature quantization, information negotiation and security enhancement. The characteristic quantization is a very critical step, and is mainly used for quantizing highly similar channel measurement values extracted by two communication parties into an initial bit sequence. The characteristic quantization directly affects key indexes such as the generation efficiency and the key consistency of the final key generation, and is a technical problem which needs to be solved urgently.
For a single Carrier Frequency Domain equalization (SC-fde) system, a key is extracted based on a Received Signal Strength Indication (RSSI) characteristic of a channel in the conventional scheme. The existing channel characteristic quantization methods achieve quantization by comparing a channel measurement value with an amplitude quantization threshold, and a channel measurement value located near the amplitude quantization threshold is easily affected by noise to cause quantization differences between two legal communication parties, for example, the total channel detection times is N times, then the amplitude quantization threshold is usually set to be an average value of the channel measurement values obtained by N times of channel detection, and due to the fact that the channel measurement amplitudes located near the average value are many, the two communication parties make differences in quantization differentiation of the channel measurement values, which may damage the consistency of an initial key.
Disclosure of Invention
In view of the above, the present invention provides a channel characteristic quantization method, a channel characteristic quantization apparatus, an electronic device, and a computer-readable storage medium, which can effectively remove the influence of environmental noise on an initial key, enhance the correlation between the initial keys of two parties of legal communication, and effectively reduce the inconsistency rate of the initial keys of the two parties of legal communication. The specific scheme is as follows:
in a first aspect, the present application discloses a channel characteristic quantization method, including:
carrying out channel detection by using the channel detection signal to obtain a channel measurement value;
carrying out amplitude position preprocessing on the channel measurement value to obtain a preprocessed channel measurement value; the amplitude position preprocessing process is to determine a frequency point position serial number corresponding to the amplitude according to the amplitude of the channel measured value, and take the frequency point position serial number as the preprocessed channel measured value;
comparing the preprocessed channel measurement value with a preset threshold value, and quantizing the preprocessed channel measurement value according to a comparison result to obtain a quantization result;
and generating an initial key according to the quantization result.
Optionally, the amplitude position preprocessing is performed on the channel measurement value to obtain a preprocessed channel measurement value, and the method includes:
determining the maximum value of all frequency points corresponding to each channel measurement value, and determining the frequency point position sequence number corresponding to the maximum value;
and taking the frequency point position serial number as the preprocessed channel measurement value.
Optionally, before comparing the preprocessed channel measurement value with a preset threshold, the method further includes:
and taking the middle position serial number of the total frequency point position serial numbers corresponding to the channel detection values as a preset threshold value.
Optionally, the comparing the preprocessed channel measurement value with a preset threshold, and quantizing the preprocessed channel measurement value according to a comparison result to obtain a quantization result includes:
judging whether the preprocessed channel measurement value is larger than the intermediate position serial number or not;
if so, quantizing the preprocessed channel measurement value into 1;
and if not, quantizing the preprocessed channel measurement value into 0.
Optionally, the generating an initial key according to the quantization result includes:
and according to the channel detection sequence corresponding to each channel detection value, the quantization results are connected in series to generate the initial key.
Optionally, the performing channel sounding by using the channel sounding signal to obtain a channel measurement value includes:
performing CFR estimation by using a pilot signal in the channel detection signal to obtain a CFR estimation result;
and performing modulus operation on the CFR estimation result to obtain the channel measurement value.
In a second aspect, the present application discloses a channel characteristic quantization apparatus, including:
the channel detection module is used for carrying out channel detection by utilizing the channel detection signal to obtain a channel measurement value;
the preprocessing module is used for preprocessing the amplitude position of the channel measured value to obtain a preprocessed channel measured value; the amplitude position preprocessing process is to determine a frequency point position serial number corresponding to the amplitude according to the amplitude of the channel measured value, and take the frequency point position serial number as the preprocessed channel measured value;
the quantization module is used for comparing the preprocessed channel measurement value with a preset threshold value and quantizing the preprocessed channel measurement value according to a comparison result to obtain a quantization result;
and the generating module is used for generating an initial key according to the quantization result.
Optionally, the preprocessing module includes:
the determining unit is used for determining the maximum value of all frequency points corresponding to each channel measured value and determining the position sequence number of the frequency point corresponding to the maximum value;
and the position serial number unit is used for taking the frequency point position serial number as the preprocessed channel measurement value.
In a third aspect, the present application discloses an electronic device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the channel characteristic quantization method as described above when executing the computer program.
In a fourth aspect, the present application discloses a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, realizes the steps of the channel characteristic quantization method as described above.
The application provides a channel characteristic quantization method, which comprises the following steps: carrying out channel detection by using the channel detection signal to obtain a channel measurement value; carrying out amplitude position preprocessing on the channel measurement value to obtain a preprocessed channel measurement value; the amplitude position preprocessing process is to determine a frequency point position serial number corresponding to the amplitude according to the amplitude of the channel measured value, and take the frequency point position serial number as the preprocessed channel measured value; comparing the preprocessed channel measurement value with a preset threshold value, and quantizing the preprocessed channel measurement value according to a comparison result to obtain a quantization result; and generating an initial key according to the quantization result.
Therefore, the method obtains the initial key by preprocessing the amplitude position of the obtained channel measurement value, quantizes the preprocessed channel measurement value, and obtains the initial key according to the quantization result, namely, the method obtains the initial key based on the position quantization threshold, can effectively remove the influence of environmental noise on the initial key, avoids the defects that the channel measurement value near the quantization threshold is easily influenced by noise to cause the difference of the quantization results of two legal communication parties and damage the consistency rate of the initial keys of the two legal communication parties in the related technology, enhances the correlation of the initial keys of the two legal communication parties, and effectively reduces the inconsistency rate of the initial keys of the two legal communication parties. The present application also provides a channel characteristic quantization apparatus, an electronic device, and a computer-readable storage medium, which have the above beneficial effects and are not described herein again.
Drawings
In order to more clearly illustrate the embodiments of the present invention 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 obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a channel characteristic quantization method according to an embodiment of the present disclosure;
fig. 2 is a flowchart of a characteristic quantization method based on a position change of a maximum value of a channel frequency domain response amplitude according to an embodiment of the present application;
fig. 3 is a schematic diagram illustrating channel sounding values of an SC-FDE communication system according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram illustrating feature quantization based on a location quantization threshold according to an embodiment of the present application;
fig. 5 is a diagram illustrating a comparison of quantization performance between preprocessed data of both parties of a legitimate communication after preprocessing based on a maximum position of a channel frequency domain response amplitude and preprocessing based on a received RSSI, according to an embodiment of the present disclosure;
fig. 6 is a diagram illustrating reciprocity effect representation of two legitimate parties after preprocessing based on a maximum position of a channel frequency domain response amplitude provided in an embodiment of the present application;
fig. 7 is a schematic structural diagram of a channel characteristic quantization apparatus according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For a single carrier communication SC-FDE system, key extraction is carried out based on the received signal strength indication characteristics of a channel. At present, the characteristic Quantization methods include a double-threshold Quantization method, a Channel Quantization with Guard-band (CQG) method and a Channel Quantization with interaction error (cqa) (Channel Quantization alteration) method. The double-threshold quantization method can ensure a lower key inconsistency rate, but discards more channel characteristic measurement values, and only one channel characteristic measurement value can be quantized to obtain a 1-bit key, so that the key generation rate is lower. Both the CQG and CQA methods perform multi-bit quantization on channel characteristic measurement values and reduce the inconsistency rate of the quantization results through a certain amount of information interaction. The CQG method can effectively reduce the rate of key inconsistency and also reduce the key generation rate by deleting the channel characteristic measurement values falling into the guard interval. It should be noted that, these characteristic quantization methods all implement quantization by comparing the channel measurement value with a quantization threshold, and the channel measurement value located near the quantization threshold is easily affected by noise to cause quantization difference between both parties of legal communication, which impairs consistency of the initial key.
Based on the above technical problem, this embodiment provides a channel characteristic quantization method, which can effectively remove the influence of environmental noise on an initial key, enhance the correlation between the initial keys of both parties of legal communication, and effectively reduce the inconsistency rate of the initial keys of both parties of legal communication, specifically referring to fig. 1, where fig. 1 is a flowchart of a channel characteristic quantization method provided in this embodiment of the present application, and specifically includes:
s101: and carrying out channel detection by using the channel detection signal to obtain a channel measurement value.
The present embodiment does not limit the specific content of the channel sounding signal, and may include pilot information, or other content, as long as the channel sounding signal can be used to perform channel sounding, and then the channel measurement value can be obtained. The embodiment does not limit the specific times of channel detection by using the channel detection signal, and channel detection can be performed according to actual conditions, and it can be understood that the more the channel detection times are, the more data are obtained, and the generation of the initial key is facilitated. The present embodiment does not limit the specific process of obtaining the channel measurement value.
In a specific embodiment, the performing channel sounding by using the channel sounding signal to obtain the channel measurement value may include:
CFR estimation is carried out by utilizing a pilot signal in the channel detection signal to obtain a CFR estimation result;
and performing modulus operation on the CFR estimation result to obtain a channel measurement value.
It can be understood that, after receiving the Channel sounding signals sent by each other, the two parties of the legal communication complete the estimation of the CFR (Channel Frequency Response) by using the pilot information in the Channel sounding signals, and obtain the Channel measurement value after taking the modulus of the CFR estimation result. It can also be understood that the CFR estimation result may include amplitude information and phase information, and the embodiment only needs the amplitude information and the position information corresponding to the amplitude information. Also, the pilot information can be generally divided into comb pilots, block pilots and trellis pilots, and the embodiment utilizes comb pilots.
S102, carrying out amplitude position preprocessing on the channel measurement value to obtain a preprocessed channel measurement value; the amplitude position preprocessing process is to determine the frequency point position serial number corresponding to the amplitude according to the amplitude of the channel measured value, and take the frequency point position serial number as the preprocessed channel measured value.
It can be understood that, in the embodiment of the present application, a characteristic based on an amplitude of a channel probe value is adopted, a frequency point position serial number corresponding to the amplitude is obtained, the selected frequency point position serial number is used as a pre-processed channel measurement value, and then subsequent characteristic quantization is performed, that is, the frequency point position serial number is selected as the pre-processed channel measurement value, and then comparison and quantization are performed with a quantization threshold, that is, a preset threshold, where the preset threshold is also the selected frequency point position serial number, so that a comparison result can be clearly obtained, and then the quantization result can be determined. The embodiment does not limit the specific characteristics of the amplitude of the selected channel measurement value, and may be the maximum value of the amplitude, or may be other values.
In a specific embodiment, the amplitude position preprocessing the channel measurement values to obtain preprocessed channel measurement values may include:
determining the maximum values of all frequency points corresponding to the measured values of all channels, and determining the position sequence numbers of the frequency points corresponding to the maximum values;
and taking the frequency point position serial number as a preprocessed channel measured value.
That is, the embodiment selects the maximum value of the frequency point corresponding to the channel measurement value, and uses the frequency point position number corresponding to the maximum value as the preprocessed channel measurement value. That is, the FFT of the channel measurement value is converted to include the CFR amplitude value of each frequency point, and the CFR amplitude value of each frequency point constitutes the channel measurement value.
In a specific embodiment, the process of preprocessing based on the position of the maximum value of the CFR amplitude may be:
1. the channel measurement is
Wherein, in the step (A),
，
representing the number of channel measurements, and measuring the number
According to the actual situation. FFT transformation of each SC-FDE symbol during frequency domain equalization at receiving end
A frequency point, the
The CFR values of the individual frequency bins constitute the channel measurements for each channel acquisition,
。
2. detecting values for each channel
Find its maximum value
Corresponding frequency point position serial number
Obtaining the preprocessed channel measurement value
。
S103, comparing the preprocessed channel measurement value with a preset threshold value, and quantizing the preprocessed channel measurement value according to a comparison result to obtain a quantization result.
It can be understood that the preset threshold in this embodiment is selected from the frequency point position serial number of the channel measurement value. The specific setting mode of the preset threshold is not limited in this embodiment, and the setting can be performed according to actual conditions.
In a specific embodiment, in order to improve the consistency of the comparison results between the two parties of the legal communication, before comparing the preprocessed channel measurement value with the preset threshold, the method may further include:
and taking the middle position serial number of the total frequency point position serial numbers corresponding to the channel detection values as a preset threshold value.
That is, in this embodiment, the middle position number of the total frequency point number position number corresponding to the channel detection value is selected as the preset threshold, and it can be understood that a channel detection value curve obtained by channel detection performed by the channel detection signal usually shows a form of a middle trough and two side wave crests.
The embodiment does not limit the specific process of quantization, and when the preset threshold is the middle position serial number, comparing the preprocessed channel measurement value with the preset threshold, and quantizing the preprocessed channel measurement value according to the comparison result to obtain a quantization result, which may include:
judging whether the preprocessed channel measurement value is larger than the middle position serial number or not;
if yes, quantizing the preprocessed channel measurement value into 1;
and if not, quantizing the preprocessed channel measurement value into 0.
That is, in this embodiment, the middle position number is used as a preset threshold to be compared with the preprocessed channel measurement value, and when the frequency point position number corresponding to the preprocessed channel measurement value, that is, the maximum value of the channel measurement value, is greater than the middle position number, the quantization result is 1; and when the position serial number of the frequency point corresponding to the preprocessed channel measurement value, namely the maximum value of the channel measurement value, is smaller than the serial number of the middle position, the quantization result is 0. It can be understood that the key is usually a character string of 0 and 1, so in the present embodiment, a quantization result character string of 0 and 1 is obtained according to the comparison result.
In the above embodiment, a specific process of comparing and quantizing the preprocessed channel measurement values with the preset threshold value is as follows, and a flowchart of the embodiment is shown in fig. 2.
1. The preset threshold value is the middle position serial number of the total frequency point position serial number of each channel detection value
And comparing the preprocessed channel measurement value with a preset threshold value.
2. If it is
If yes, the quantization is 0; if it is
The quantization is 1. Thus, each preprocessed channel measurement value is quantized into 1 bit, and all quantization results are concatenated to obtain an initial key.
And S104, generating an initial key according to the quantization result.
It should be understood that the present embodiment does not limit the order in which the quantization result is generated into the initial key, as long as both parties of the legitimate communication guarantee the consistency of the two parties.
In a specific embodiment, in order to reduce the frequency of information interaction between two legitimate communication parties and reduce the occupation of communication resources, in this embodiment, generating the initial key according to the quantization result may include:
and according to the channel detection sequence corresponding to each channel detection value, the quantization results are connected in series to generate an initial key.
In this embodiment, the quantization results are concatenated according to the channel detection sequence to obtain an initial key. The channel detection sequence is used as the concatenation sequence of the quantization result, other complex concatenation modes are not needed to be set, the frequency of information interaction between two legal communication parties can be reduced, and the occupation of communication resources is reduced.
Based on the above technical solution, the initial key is obtained by the method based on the position quantization threshold in this embodiment, which can effectively remove the influence of environmental noise on the initial key, and avoid the defect that the coincidence rate of the initial keys of both parties of the legal communication is damaged due to the difference of the quantization results of both parties of the legal communication caused by the fact that the channel measurement value near the quantization threshold is easily influenced by noise in the method based on the amplitude quantization threshold in the related art, so as to enhance the correlation of the initial keys of both parties of the legal communication, and effectively reduce the inconsistency rate of the initial keys of both parties of the legal communication.
The present embodiment provides another specific embodiment based on a characteristic quantization method of the position change of the maximum value of the channel frequency response amplitude.
in this embodiment, two legal communication parties form a point-to-point TDD-SCFDE (Time Division duplex Single Carrier Frequency Domain Equalization) communication system, and complete estimation of a CFR (Channel Frequency Response) by using pilot information in a received probe signal in a manner of sending Channel probe signals to each other, and obtain a Channel measurement value by modulo of a CFR estimation result, where a signal probe value acquisition schematic diagram is shown in fig. 3.
Step 2: preprocessing the channel measurement value based on the position of the maximum value of the CFR amplitude value to obtain a preprocessed channel measurement value;
step 2.1: channel measurement
Comprises
The frequency points of the frequency are divided into a plurality of frequency points,
；
step 2.2: for thePer channel sounding values
Find its maximum value
Corresponding frequency point position serial number
Obtaining the preprocessed channel measurement value
In this embodiment, each SC-FDE symbol is FFT-converted into 64 frequency points when frequency domain equalization is performed at the receiving end, and the CFR values of the 64 frequency points constitute a channel measurement value for each channel detection. For practical effect, the CFR values of 210 SC-FDE symbols are taken to form the channel measurement value
. The CFR values for each symbol constitute the channel measurements
Calculating the frequency point position sequence number corresponding to the maximum CFR value
Obtaining the preprocessed channel measurement value
. Fig. 4 is a schematic diagram of characteristic quantization based on a quantization threshold corresponding to an amplitude position according to this embodiment.
And step 3: comparing the preprocessed channel measurement values with a preset threshold value, and quantizing each preprocessed channel measurement value into 1 bit according to a comparison result to obtain an initial key;
step 3.1: the preset threshold is the middle position serial number 32 of the total frequency point position serial number 64 of each channel detection value, and the preprocessed channel measurement value is compared with the selected threshold, namely the preset threshold 32.
Step 3.2: if it is
If yes, the quantization is 0; if it is
The quantization is 1. Thus quantizing each preprocessed channel measurement to 1 bit.
All the quantization results are concatenated to obtain an initial key
。
In order to verify the feature quantization based on amplitude position preprocessing proposed in this embodiment, that is, the method based on channel frequency domain response amplitude maximum value position preprocessing, fig. 5 is a quantization performance comparison diagram between the method and preprocessed data of both sides of legal communication after preprocessing based on Received Signal Strength (RSSI); the horizontal coordinate is the serial number of the channel detection times, and the vertical coordinate is the average intensity of the received signals, so that the reciprocity of the two parties is poor. Fig. 6 is a diagram showing reciprocity effect of both legal parties after preprocessing channel probe values by the quantization method provided by the present invention, where the horizontal axis is the frequency point position sequence number of the channel probe values of both legal communication parties (for example, Alice and Bob), the vertical axis is the corresponding coordinate division times, the maximum position sequence number of each group of channel feature values corresponding to Alice and Bob of both communication parties is the coordinate, and the corresponding heatmap is made according to the coordinate distribution times, and the channel reciprocity of both communication parties is better as the result of observing that most of the maximum positions of each group of channel probe values of both communication parties are present on the same side. Compared with the common channel estimation value reciprocity based on RSSI, the characteristic quantization method provided by the application can meet the requirement of key extraction on the channel reciprocity.
Based on the embodiment, the characteristic quantization method based on the position change of the maximum value of the channel frequency domain response amplitude performs preprocessing on the channel measurement value through the position serial number of the frequency point corresponding to the maximum value of the CFR, so that the influence of environmental noise on the initial key value can be effectively removed, and the correlation of the initial keys of both legal communication parties is enhanced. The method is not based on the traditional amplitude quantization threshold, but is based on the position quantization threshold to realize the single-bit quantization of the channel measurement value, and the selected new quantization characteristic threshold effectively reduces the difference of the quantization results of both legal communication parties caused by the channel measurement value near the quantization threshold, thereby effectively reducing the inconsistency rate of the initial keys of both legal communication parties. The method also has lower computational complexity, and both legal communication parties do not need to carry out information interaction in the characteristic quantization process, thereby effectively reducing the occupation of communication resources.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a channel characteristic quantization apparatus provided in an embodiment of the present application, where the channel characteristic quantization apparatus described below and the channel characteristic quantization method described above are referred to in correspondence, and the relevant modules are all disposed therein, and the channel characteristic quantization apparatus provided in the embodiment of the present application includes:
in some specific embodiments, the method specifically includes:
a channel detection module 701, configured to perform channel detection using a channel detection signal to obtain a channel measurement value;
a preprocessing module 702, configured to perform amplitude position preprocessing on the channel measurement value to obtain a preprocessed channel measurement value; the amplitude position preprocessing process is to determine a frequency point position serial number corresponding to an amplitude according to the amplitude of a channel measured value, and take the frequency point position serial number as a preprocessed channel measured value;
a quantization module 703, configured to compare the preprocessed channel measurement value with a preset threshold, and quantize the preprocessed channel measurement value according to a comparison result, to obtain a quantization result;
a generating module 704, configured to generate an initial key according to the quantization result.
In some specific embodiments, the preprocessing module 702 includes:
the determining unit is used for determining the maximum values of all frequency points corresponding to the measured values of all the channels and determining the position sequence numbers of the frequency points corresponding to the maximum values;
and the position serial number unit is used for taking the frequency point position serial number as a preprocessed channel measured value.
In some specific embodiments, the method further comprises:
and the setting module is used for taking the middle position serial number of the total frequency point number position serial numbers corresponding to the channel detection values as a preset threshold value.
In some specific embodiments, the quantization module 703 includes:
judging whether the preprocessed channel measurement value is larger than the middle position serial number or not;
if yes, quantizing the preprocessed channel measurement value into 1;
and if not, quantizing the preprocessed channel measurement value into 0.
In some specific embodiments, the generating module 704 includes:
and the generating unit is used for connecting the quantization results in series according to the channel detection sequence corresponding to each channel detection value to generate an initial key.
In some specific embodiments, the channel sounding module 701 includes:
a CFR estimation unit, configured to perform CFR estimation using a pilot signal in the channel sounding signal to obtain a CFR estimation result;
and the modulus taking unit is used for taking the modulus of the CFR estimation result to obtain a channel measurement value.
Since the embodiment of the channel characteristic quantization apparatus corresponds to the embodiment of the channel characteristic quantization method, please refer to the description of the embodiment of the channel characteristic quantization method for the embodiment of the channel characteristic quantization apparatus, which is not repeated herein.
In the following, an electronic device provided by an embodiment of the present application is introduced, and the electronic device described below and the channel characteristic quantization method described above may be referred to correspondingly.
The application provides an electronic device, including:
a memory for storing a computer program;
a processor for implementing the steps of the channel characteristic quantization method as described above when executing a computer program.
Since the embodiment of the electronic device portion corresponds to the embodiment of the channel characteristic quantization method portion, please refer to the description of the embodiment of the channel characteristic quantization method portion for the embodiment of the electronic device portion, which is not repeated here.
The application also discloses a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the above channel characteristic quantization method.
Since the embodiment of the computer-readable storage medium portion corresponds to the embodiment of the channel characteristic quantization method portion, please refer to the description of the embodiment of the channel characteristic quantization method portion for the embodiment of the computer-readable storage medium portion, which is not repeated here.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
A method, an apparatus, an electronic device, and a computer-readable storage medium for channel characteristic quantization provided in the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (10)
1. A method for quantizing channel characteristics, comprising:
carrying out channel detection by using the channel detection signal to obtain a channel measurement value;
carrying out amplitude position preprocessing on the channel measurement value to obtain a preprocessed channel measurement value; the amplitude position preprocessing process is to determine a frequency point position serial number corresponding to the amplitude according to the amplitude of the channel measured value, and take the frequency point position serial number as the preprocessed channel measured value;
comparing the preprocessed channel measurement value with a preset threshold value, and quantizing the preprocessed channel measurement value according to a comparison result to obtain a quantization result;
and generating an initial key according to the quantization result.
2. The method of claim 1, wherein the preprocessing the channel measurements for amplitude and position to obtain the preprocessed channel measurements comprises:
determining the maximum value of all frequency points corresponding to each channel measurement value, and determining the frequency point position sequence number corresponding to the maximum value;
and taking the frequency point position serial number as the preprocessed channel measurement value.
3. The method of claim 1, wherein before comparing the preprocessed channel measurement values with a predetermined threshold, the method further comprises:
and taking the middle position serial number of the total frequency point position serial numbers corresponding to the channel detection values as a preset threshold value.
4. The method according to claim 3, wherein the comparing the preprocessed channel measurement values with a preset threshold and quantizing the preprocessed channel measurement values according to the comparison result to obtain a quantization result comprises:
judging whether the preprocessed channel measurement value is larger than the intermediate position serial number or not;
if so, quantizing the preprocessed channel measurement value into 1;
and if not, quantizing the preprocessed channel measurement value into 0.
5. The method for quantizing channel characteristics according to claim 4, wherein the generating an initial key according to the quantization result comprises:
and according to the channel detection sequence corresponding to each channel detection value, the quantization results are connected in series to generate the initial key.
6. The method of claim 1, wherein the performing channel sounding using the channel sounding signal to obtain the channel measurement value comprises:
performing CFR estimation by using a pilot signal in the channel detection signal to obtain a CFR estimation result;
and performing modulus operation on the CFR estimation result to obtain the channel measurement value.
7. An apparatus for quantizing channel characteristics, comprising:
the channel detection module is used for carrying out channel detection by utilizing the channel detection signal to obtain a channel measurement value;
the preprocessing module is used for preprocessing the amplitude position of the channel measured value to obtain a preprocessed channel measured value; the amplitude position preprocessing process is to determine a frequency point position serial number corresponding to the amplitude according to the amplitude of the channel measured value, and take the frequency point position serial number as the preprocessed channel measured value;
the quantization module is used for comparing the preprocessed channel measurement value with a preset threshold value and quantizing the preprocessed channel measurement value according to a comparison result to obtain a quantization result;
and the generating module is used for generating an initial key according to the quantization result.
8. The apparatus of claim 7, wherein the preprocessing module comprises:
the determining unit is used for determining the maximum value of all frequency points corresponding to each channel measured value and determining the position sequence number of the frequency point corresponding to the maximum value;
and the position serial number unit is used for taking the frequency point position serial number as the preprocessed channel measurement value.
9. An electronic device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the channel characteristic quantization method according to any one of claims 1 to 6 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the channel characteristic quantization method according to any one of claims 1 to 6.
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