CN117040655B - Method and device for calculating ultra-wideband signal jitter, electronic equipment and storage medium - Google Patents
Method and device for calculating ultra-wideband signal jitter, electronic equipment and storage medium Download PDFInfo
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Abstract
The application relates to the technical field of communication and provides a method and a device for calculating ultra-wideband signal jitter, electronic equipment and a storage medium. The method comprises the following steps: selecting the original ultra-wideband signal with limited length, interpolating the selected ultra-wideband signal, and selecting and arranging the interpolated data to obtain a data sequence to be processed; synchronous processing is carried out on the data sequence to be processed to obtain a signal to be superimposed; performing time domain mixing and superposition processing on signals to be superimposed to obtain symbol reference signals; and obtaining symbol jitter according to the data sequence to be processed, the symbol reference signal and the reference position of each symbol of the ultra-wideband signal determined by the ultra-wideband standard protocol. By adopting the method and the device, under the condition of not improving the sampling rate, the time sequence of the ultra-wideband signal is compensated, the error is reduced, and the obtained symbol jitter is more accurate, so that the accuracy and the reliability of data measurement are improved.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a method and apparatus for calculating ultra-wideband signal jitter, an electronic device, and a storage medium.
Background
UWB (Ultra wide Band) is a wireless carrier communication technology that does not use a sinusoidal carrier, but uses non-sinusoidal narrow pulses of nanosecond order to transmit data, so that it occupies a wide spectrum.
However, in the related art, in order to pursue higher calculation accuracy of ultra-wideband signal jitter, a higher sampling rate is required, and higher demands are made on hardware and memory.
Disclosure of Invention
In view of this, the embodiments of the present application provide a method, an apparatus, an electronic device, and a storage medium for calculating ultra-wideband signal jitter, so as to solve the problem that in the prior art, in order to pursue higher calculation accuracy of ultra-wideband signal jitter, a higher sampling rate is required, and higher demands are made on hardware and memory.
In a first aspect of an embodiment of the present application, a method for calculating ultra-wideband signal jitter is provided, including:
selecting the original ultra-wideband signal with limited length, interpolating the selected ultra-wideband signal, and selecting and arranging the interpolated data to obtain a data sequence to be processed;
synchronous processing is carried out on the data sequence to be processed to obtain a signal to be superimposed;
performing time domain mixing and superposition processing on signals to be superimposed to obtain symbol reference signals;
and obtaining symbol jitter according to the data sequence to be processed, the symbol reference signal and the reference position of each symbol of the ultra-wideband signal determined by the ultra-wideband standard protocol.
In a second aspect of the embodiments of the present application, there is provided an apparatus for calculating ultra-wideband signal jitter, including:
the interpolation module is configured to perform limited length selection on the original ultra-wideband signals, perform interpolation processing on the ultra-wideband signals obtained by selection, and perform selection arrangement on the interpolated data to obtain a data sequence to be processed;
the synchronous module is configured to synchronously process the data sequence to be processed to obtain a signal to be superimposed;
the superposition module is configured to perform time domain mixing superposition processing on signals to be superimposed to obtain symbol reference signals;
the first calculation module is configured to obtain symbol jitter according to the data sequence to be processed, the symbol reference signal and the reference position of each symbol of the ultra-wideband signal determined through the ultra-wideband standard protocol.
In a third aspect of the embodiments of the present application, there is provided an electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the above method when executing the computer program.
In a fourth aspect of the embodiments of the present application, there is provided a storage medium storing a computer program which, when executed by a processor, implements the steps of the above method.
Compared with the prior art, the embodiment of the application has the beneficial effects that: selecting the original ultra-wideband signal with limited length, interpolating the selected ultra-wideband signal, and selecting and arranging the interpolated data to obtain a data sequence to be processed; synchronous processing is carried out on the data sequence to be processed to obtain a signal to be superimposed; performing time domain mixing and superposition processing on signals to be superimposed to obtain symbol reference signals; and obtaining symbol jitter according to the data sequence to be processed, the symbol reference signal and the reference position of each symbol of the ultra-wideband signal determined by the ultra-wideband standard protocol. By adopting the technical means, the time sequence of the ultra-wideband signal is compensated without increasing the sampling rate, the error is reduced, and the obtained symbol jitter is more accurate, so that the accuracy and the reliability of data measurement are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly introduce the drawings that are needed in the embodiments or the description of the prior art, it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for calculating ultra-wideband signal jitter according to an embodiment of the present application;
fig. 2 is a flow chart of another method for calculating ultra-wideband signal jitter according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of an ultra-wideband signal jitter calculating device according to an embodiment of the present application;
FIG. 4 is a schematic diagram of another ultra wideband signal dithering computing device according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system configurations, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
A method and apparatus for calculating ultra wideband signal jitter according to embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a flow chart of a method for calculating ultra-wideband signal jitter according to an embodiment of the present application. The method of calculating ultra wideband signal jitter of fig. 1 may be performed by a computer or a server. As shown in fig. 1, the method for calculating ultra-wideband signal jitter includes:
s101, selecting the original ultra-wideband signal with a limited length, performing interpolation processing on the ultra-wideband signal obtained by selection, and selecting and arranging the interpolated data to obtain a data sequence to be processed;
s102, synchronously processing a data sequence to be processed to obtain a signal to be superimposed;
s103, performing time domain mixing and superposition processing on signals to be superimposed to obtain symbol reference signals;
and S104, obtaining symbol jitter according to the data sequence to be processed, the symbol reference signal and the reference position of each symbol of the ultra-wideband signal determined by the ultra-wideband standard protocol.
It should be noted that, the original ultra wideband signal in the present application refers to an ultra wideband signal after original sampling and initial synchronization, where the multiplying power of the original sampling is recorded as an oversampling multiplying power of the original data, for example, the oversampling multiplying power of the original data is 6.
According to the technical scheme provided by the embodiment of the application, the original ultra-wideband signal is selected in a limited length, interpolation processing is carried out on the selected ultra-wideband signal, and the interpolated data are selected and arranged to obtain a data sequence to be processed; synchronous processing is carried out on the data sequence to be processed to obtain a signal to be superimposed; performing time domain mixing and superposition processing on signals to be superimposed to obtain symbol reference signals; and obtaining Symbol jitter (Symbol jitter) according to the data sequence to be processed, the Symbol reference signal and the reference position of each Symbol of the ultra-wideband signal determined by the ultra-wideband standard protocol. By adopting the technical means, the time sequence of the ultra-wideband signal is compensated without increasing the sampling rate, the error is reduced, and the obtained symbol jitter is more accurate, so that the accuracy and the reliability of data measurement are improved.
In an exemplary embodiment, as shown in fig. 2, the method for calculating ultra-wideband signal jitter further includes:
s105, screening the data sequence to be processed according to an ultra-wideband standard protocol, and determining the actual position of each positive pulse and the actual position of each negative pulse in the data sequence to be processed;
s106, superposing all positive pulses in the data sequence to be processed, averaging the superposed positive pulses to obtain a first reference signal, and performing modulo and maximum value operation on the first reference signal to obtain the reference positions of a plurality of positive pulses; superposing all negative pulses in the data sequence to be processed, averaging the superposed negative pulses to obtain a second reference signal, and performing modulo and maximum value operation on the second reference signal to obtain the reference positions of a plurality of negative pulses;
s107, subtracting the actual position of each positive pulse from the corresponding reference position to obtain a plurality of positive pulse position differences, and taking each positive pulse position difference as the first chip jitter of the corresponding positive pulse; and subtracting the actual position of each negative pulse from the corresponding reference position to obtain a plurality of negative pulse position differences, and taking each negative pulse position difference as the second chip jitter of the corresponding negative pulse.
The positive pulse position difference is the time offset of the actual position of the positive pulse relative to the reference position, the negative pulse position difference is the time offset of the actual position of the negative pulse relative to the reference position, and the time offset is the Chip jitter.
Specifically, the reference position of the positive pulse can be obtained by max (abs (first reference signal)). Wherein the first reference signal is a complex number array, abs is a modulo operation, and max is a calculation of a position of a maximum value.
The reference position of the negative pulse can be obtained by max (abs (second reference signal)). Wherein the second reference signal is a complex number array, abs is a modulo operation, and max is a calculation of the position of the maximum value.
According to the technical scheme provided by the embodiment of the application, the chip jitter can be further obtained, the calculation result is more accurate, and the accuracy and the reliability of data measurement can be improved.
Since the actual positions of the symbols and the actual positions of the pulses are different in source and length, the calculation methods of the symbol jitter and the chip jitter are relatively independent, and the symbol jitter and the chip jitter are obtained by different calculation methods. In the present application, chips (chips) are the smallest chips of the ultra-wideband signal, and symbols (Symbol) are the symbols of the ultra-wideband signal composed of chips.
Specifically, the method for calculating the ultra-wideband signal jitter comprises a method for calculating the symbol jitter of the ultra-wideband signal and a method for calculating the chip jitter of the ultra-wideband signal. The method for calculating the symbol jitter of the ultra-wideband signal comprises the steps of S101, S102, S103 and S104; the method for calculating the chip jitter of the ultra wideband signal includes steps S101, S105, S106 and S107.
In an exemplary embodiment, the selecting the original ultra wideband signal with a limited length, performing interpolation processing on the selected ultra wideband signal, and performing selection permutation on the interpolated data to obtain a data sequence to be processed, including:
sequentially selecting from preset positions of an original ultra-wideband signal to obtain M-1 data sequences, and respectively carrying out interpolation processing on the M-1 data sequences to obtain M-1 data to be processed; wherein M is the number of preconfigured symbols, and Q is the length of each data sequence; for example, M is 64 and Q is 4096.
And sequentially arranging the M-1 data to be processed according to a preset symbol sequence to obtain a data sequence to be processed.
Specifically, the preset position of the original ultra-wideband signal is the rising edge position determined after the original ultra-wideband signal is subjected to original sampling and initial synchronization, and M-1 data sequences are sequentially selected by taking the rising edge position determined after the initial synchronization as the initial position.
In an exemplary embodiment, interpolating any one data sequence includes:
performing fast Fourier transform on the data sequence to obtain a frequency domain signal;
inserting a first full 0 sequence with a preset length in the middle of the frequency domain signal, and then performing inverse fast Fourier transform to obtain a time domain signal; the first preset length is the product of a first numerical value and Q, and the first numerical value is the preset oversampling multiplying power minus 1; for example, the preset oversampling ratio is 40. First preset length= (preset oversampling ratio-1) ×q. The length of the time domain signal is the product of the interpolation multiplying power and Q, and the interpolation multiplying power is the preset oversampling multiplying power.
Intercepting a data sequence with a second preset length from the time domain signal to obtain data to be processed; the second preset length is a preset synchronization data symbol length.
The method comprises the steps of selecting a first data sequence from a preset position of an original ultra-wideband signal, and carrying out interpolation processing on the first data sequence to obtain first data to be processed, wherein the length of the first data to be processed is a preset synchronous data symbol length; then, selecting a second data sequence, performing interpolation processing on the second data sequence to obtain second data to be processed, wherein the length of the second data to be processed is the length of a preset synchronous data symbol, … …, until the M-1 data sequence is selected, performing interpolation processing on the M-1 data sequence to obtain M-1 data to be processed, and stopping selecting when the length of the M-1 data to be processed is the length of the preset synchronous data symbol. And sequentially arranging the M-1 data to be processed according to a preset symbol sequence to obtain a data sequence to be processed.
According to the technical scheme provided by the embodiment of the application, the sampling rate can be increased and the error can be reduced by carrying out fast Fourier transform interpolation processing on the selected ultra-wideband signal, so that the accuracy of the calculation result of the ultra-wideband signal dithering is improved.
In an exemplary embodiment, the synchronization processing is performed on the data sequence to be processed to obtain a signal to be superimposed, including:
intercepting a data sequence with a third preset length from the data sequence to be processed as a data sequence to be synchronized; the third preset length is the product of the preset synchronous data symbol length and 2.
Determining the rising edge position by carrying out sliding correlation calculation on the data sequence to be synchronized and the local synchronous code sequence;
taking the rising edge position as a starting position, and intercepting a data sequence with a fourth preset length from the data sequence to be processed as a signal to be superimposed; the fourth preset length is the product of the preset synchronous data symbol length and the preset synchronous data symbol number.
Specifically, the rising edge position can obtain a correlation peak position through a sliding correlation algorithm, and the correlation peak position is the rising edge position.
The sliding correlation algorithm includes:
sum ((abs (data sequence to be synchronized))× (abs (local synchronization code sequence)) 2 ) Where abs represents a modulo operation, x represents a dot product operation, sum represents a summation operation, and the local synchronization code sequence is a real number array.
In an exemplary embodiment, performing time-domain hybrid superposition processing on a signal to be superimposed to obtain a symbol reference signal, including:
sequentially decomposing signals to be superimposed into P signals with different time periods and the same length according to time sequence, wherein P is the number of preset synchronous data symbols;
superposing the decomposed signals with the same length, and taking an average value to obtain an average value signal;
and carrying out data extraction on the mean signal by a preset synchronous extraction step length to obtain a symbol reference signal.
Specifically, the signal to be superimposed is sequentially decomposed into a 1 st signal and a 2 nd signal … … P signal according to time sequence, the lengths of the 1 st signal, the 2 nd signal, the … … nd signal and the P signal are the same, the time period of the 1 st signal is t1, the time period of the 2 nd signal is t2, … …, the time period of the P signal is tp, and the time period t1, the time period t2, the … and the time period tp are combined together to form continuous time.
According to the technical scheme provided by the embodiment of the application, the symbol reference signal is obtained by carrying out time domain mixing superposition processing on the signal to be superimposed, so that the time sequence compensation of the ultra-wideband signal is realized, the error can be reduced, and the accuracy of the calculation result of the ultra-wideband signal jitter is improved.
In an exemplary embodiment, deriving symbol jitter from a sequence of data to be processed, a symbol reference signal, and a reference position for each symbol of an ultra-wideband signal determined by an ultra-wideband standard protocol, comprises:
extracting a data sequence with a fifth preset length from the data sequence to be processed by taking the rising edge position as a starting position to serve as a data sequence to be correlated;
determining the actual position of each symbol of the ultra-wideband signal by performing sliding correlation calculation on the data sequence to be correlated and the symbol reference signal;
the actual position of each symbol is subtracted from the corresponding reference position to obtain a plurality of symbol position differences, and each symbol position difference is taken as the symbol jitter of the corresponding symbol.
The symbol position difference is the time offset of the actual position of the symbol relative to the reference position, and the time offset is symbol jitter.
Specifically, by performing sliding correlation calculation on the data sequence to be correlated and the symbol reference signal, all correlation peak positions can be obtained, and each correlation peak position is the actual position of each symbol of the ultra-wideband signal.
Specifically, the actual position of each symbol of the ultra-wideband signal can specifically obtain all correlation peak positions through a sliding correlation algorithm, and each correlation peak position is the actual position of each symbol of the ultra-wideband signal.
The sliding correlation algorithm includes:
sum (abs (data sequence to be correlated) ×conj (symbol reference signal)) 2 ) Wherein abs represents a modulo operation, x represents a dot-multiply operation, sum represents a summation operation, conj represents a conjugate operation, and the symbol reference signal is a complex array.
Any combination of the above optional solutions may be adopted to form an optional embodiment of the present application, which is not described herein in detail.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic of each process, and should not limit the implementation process of the embodiment of the present application in any way.
The following are device embodiments of the present application, which may be used to perform method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.
Fig. 3 is a schematic diagram of an ultra-wideband signal jitter calculating device according to an embodiment of the present application. As shown in fig. 3, the apparatus for calculating ultra-wideband signal jitter includes:
the interpolation module 201 is configured to perform finite length selection on an original ultra-wideband signal, perform interpolation processing on the selected ultra-wideband signal, and perform selection and arrangement on the interpolated data to obtain a data sequence to be processed;
the synchronization module 202 is configured to perform synchronization processing on the data sequence to be processed to obtain a signal to be superimposed;
the superposition module 203 is configured to perform time domain mixing superposition processing on the signal to be superimposed to obtain a symbol reference signal;
a first calculation module 204 is configured to derive symbol jitter from the data sequence to be processed, the symbol reference signal, and a reference position for each symbol of the ultra wideband signal determined by the ultra wideband standard protocol.
It should be noted that, the original ultra wideband signal in the present application refers to an ultra wideband signal after original sampling and initial synchronization, where the multiplying power of the original sampling is recorded as an oversampling multiplying power of the original data, for example, the oversampling multiplying power of the original data is 6.
According to the technical scheme provided by the embodiment of the application, the original ultra-wideband signal is selected in a limited length, interpolation processing is carried out on the selected ultra-wideband signal, and the interpolated data are selected and arranged to obtain a data sequence to be processed; synchronous processing is carried out on the data sequence to be processed to obtain a signal to be superimposed; performing time domain mixing and superposition processing on signals to be superimposed to obtain symbol reference signals; and obtaining Symbol jitter (Symbol jitter) according to the data sequence to be processed, the Symbol reference signal and the reference position of each Symbol of the ultra-wideband signal determined by the ultra-wideband standard protocol. By adopting the technical means, the time sequence of the ultra-wideband signal is compensated without increasing the sampling rate, the error is reduced, and the obtained symbol jitter is more accurate, so that the accuracy and the reliability of data measurement are improved.
In an exemplary embodiment, as shown in fig. 4, the ultra-wideband signal dithering computing device further includes:
the first determining module 205 is configured to screen the data sequence to be processed according to the ultra-wideband standard protocol, and determine an actual position of each positive pulse and an actual position of each negative pulse in the data sequence to be processed;
a second determining module 206, configured to superimpose all positive pulses in the data sequence to be processed, average the superimposed positive pulses to obtain a first reference signal, and perform modulo and maximum operation on the first reference signal to obtain a reference position of a plurality of positive pulses; superposing all negative pulses in the data sequence to be processed, averaging the superposed negative pulses to obtain a second reference signal, and performing modulo and maximum value operation on the second reference signal to obtain the reference positions of a plurality of negative pulses;
a second calculation module 207 configured to subtract the actual position of each positive pulse from the corresponding reference position, resulting in a plurality of positive pulse position differences, each positive pulse position difference being taken as the first chip jitter of the corresponding positive pulse; and subtracting the actual position of each negative pulse from the corresponding reference position to obtain a plurality of negative pulse position differences, and taking each negative pulse position difference as the second chip jitter of the corresponding negative pulse.
Specifically, the reference position of the positive pulse can be obtained by max (abs (first reference signal)). Wherein the first reference signal is a complex number array, abs is a modulo operation, and max is a calculation of a position of a maximum value.
The reference position of the negative pulse can be obtained by max (abs (second reference signal)). Wherein the second reference signal is a complex number array, abs is a modulo operation, and max is a calculation of the position of the maximum value.
According to the technical scheme provided by the embodiment of the application, the Chip jitter (Chip jitter) can be further obtained, the calculation result is more accurate, and the accuracy and the reliability of data measurement can be improved.
In an exemplary embodiment, the interpolation module 201 is specifically configured to sequentially select from a preset position of the original ultra wideband signal to obtain M-1 data sequences, and perform interpolation processing on the M-1 data sequences to obtain M-1 data to be processed respectively; wherein M is the number of preconfigured symbols, and Q is the length of each data sequence; and sequentially arranging the M-1 data to be processed according to a preset symbol sequence to obtain a data sequence to be processed.
For example, M is 64 and Q is 4096. The preset position of the original ultra-wideband signal is the rising edge position determined after the original ultra-wideband signal is subjected to original sampling and initial synchronization, and M-1 data sequences are sequentially selected by taking the rising edge position determined after the initial synchronization as the initial position.
In an exemplary embodiment, the interpolation module 201 is further specifically configured to perform interpolation processing on any data sequence, including: performing fast Fourier transform on the data sequence to obtain a frequency domain signal; inserting a first full 0 sequence with a preset length in the middle of the frequency domain signal, and then performing inverse fast Fourier transform to obtain a time domain signal; the first preset length is the product of a first numerical value and Q, and the first numerical value is the preset oversampling multiplying power minus 1; intercepting a data sequence with a second preset length from the time domain signal to obtain data to be processed; the second preset length is a preset synchronization data symbol length.
According to the technical scheme provided by the embodiment of the application, the sampling rate can be increased and the error can be reduced by carrying out fast Fourier transform interpolation processing on the selected ultra-wideband signal, so that the accuracy of the calculation result of the ultra-wideband signal dithering is improved.
In an exemplary embodiment, the synchronization module 202 is specifically configured to intercept a data sequence of a third preset length from the data sequence to be processed as the data sequence to be synchronized; the third preset length is the product of the preset synchronous data symbol length and 2; determining the rising edge position by carrying out sliding correlation calculation on the data sequence to be synchronized and the local synchronous code sequence; taking the rising edge position as a starting position, and intercepting a data sequence with a fourth preset length from the data sequence to be processed as a signal to be superimposed; the fourth preset length is the product of the preset synchronous data symbol length and the preset synchronous data symbol number.
In an exemplary embodiment, the superposition module 203 is specifically configured to sequentially decompose the signal to be superimposed into P signals with different time periods and the same length according to the time sequence, where P is the number of preset synchronization data symbols; superposing the decomposed signals with the same length, and taking an average value to obtain an average value signal; and carrying out data extraction on the mean signal by a preset synchronous extraction step length to obtain a symbol reference signal.
According to the technical scheme provided by the embodiment of the application, the symbol reference signal is obtained by carrying out time domain mixing superposition processing on the signal to be superimposed, so that the time sequence compensation of the ultra-wideband signal is realized, the error can be reduced, and the accuracy of the calculation result of the ultra-wideband signal jitter is improved.
In an exemplary embodiment, the first calculating module 204 is specifically configured to extract, from the data sequences to be processed, a data sequence of a fifth preset length from the rising edge position as a starting position, as the data sequence to be correlated; determining the actual position of each symbol of the ultra-wideband signal by performing sliding correlation calculation on the data sequence to be correlated and the symbol reference signal; the actual position of each symbol is subtracted from the corresponding reference position to obtain a plurality of symbol position differences, and each symbol position difference is taken as the symbol jitter of the corresponding symbol.
Specifically, by performing sliding correlation calculation on the data sequence to be correlated and the symbol reference signal, all correlation peak positions can be obtained, and each correlation peak position is the actual position of each symbol of the ultra-wideband signal.
Based on the same inventive concept, the embodiments of the present application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor implements the steps of the method for calculating ultra wideband signal jitter provided in any of the embodiments described above when the processor executes the computer program.
Fig. 5 is a schematic diagram of an electronic device 3 provided in an embodiment of the present application. As shown in fig. 5, the electronic apparatus 3 of this embodiment includes: a processor 301, a memory 302 and a computer program 303 stored in the memory 302 and executable on the processor 301. The steps of the various method embodiments described above are implemented when the processor 301 executes the computer program 303. Alternatively, the processor 301, when executing the computer program 303, performs the functions of the modules/units in the above-described apparatus embodiments.
The electronic device 3 may be an electronic device such as a desktop computer, a notebook computer, a palm computer, or a cloud server. The electronic device 3 may include, but is not limited to, a processor 301 and a memory 302. It will be appreciated by those skilled in the art that fig. 5 is merely an example of the electronic device 3 and is not limiting of the electronic device 3 and may include more or fewer components than shown, or different components.
The processor 301 may be a central processing unit (Central Processing Unit, CPU) or other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components, or the like.
The memory 302 may be an internal storage unit of the electronic device 3, for example, a hard disk or a memory of the electronic device 3. The memory 302 may also be an external storage device of the electronic device 3, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card) or the like, which are provided on the electronic device 3. The memory 302 may also include both internal storage units and external storage devices of the electronic device 3. The memory 302 is used to store computer programs and other programs and data required by the electronic device.
Based on the same inventive concept, the embodiments of the present application provide a readable storage medium storing a computer program which, when executed by a processor, implements the steps of the method according to any of the embodiments described above.
The readable storage medium provided in the embodiments of the present application has the same inventive concept and the same advantages as those of the previous embodiments, and the content not shown in detail in the readable storage medium may refer to the previous embodiments, which are not described herein again.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium (e.g., a computer readable storage medium). Based on such understanding, the present application implements all or part of the flow in the methods of the above embodiments, or may be implemented by a computer program to instruct related hardware, and the computer program may be stored in a computer readable storage medium, where the computer program may implement the steps of the respective method embodiments described above when executed by a processor. The computer program may comprise computer program code, which may be in source code form, object code form, executable file or in some intermediate form, etc. The computer readable storage medium may include: any entity or device capable of carrying computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (6)
1. The method for calculating the ultra-wideband signal jitter is characterized by comprising the following steps of:
selecting the original ultra-wideband signal with limited length, interpolating the selected ultra-wideband signal, and selecting and arranging the interpolated data to obtain a data sequence to be processed;
synchronizing the data sequence to be processed to obtain a signal to be superimposed;
performing time domain mixing and superposition processing on the signals to be superimposed to obtain symbol reference signals;
obtaining symbol jitter according to the data sequence to be processed, the symbol reference signal and the reference position of each symbol of the ultra-wideband signal determined by an ultra-wideband standard protocol;
the method comprises the steps of selecting the original ultra-wideband signal in a limited length, performing interpolation processing on the selected ultra-wideband signal, and performing selection arrangement on the interpolated data to obtain a data sequence to be processed, wherein the method comprises the following steps: sequentially selecting from preset positions of an original ultra-wideband signal to obtain M-1 data sequences, and respectively carrying out interpolation processing on the M-1 data sequences to obtain M-1 data to be processed; wherein M is the number of preconfigured symbols, Q is the length of each data sequence; sequentially arranging the M-1 data to be processed according to a preset symbol sequence to obtain a data sequence to be processed;
any one of the data sequences is subjected to interpolation processing, which comprises the following steps: performing fast Fourier transform on the data sequence to obtain a frequency domain signal; inserting a first full 0 sequence with a preset length in the middle of the frequency domain signal, and then performing inverse fast Fourier transform to obtain a time domain signal; the first preset length is the product of a first numerical value and Q, and the first numerical value is the preset oversampling multiplying power minus 1; intercepting a data sequence with a second preset length from the time domain signal to obtain data to be processed; wherein the second preset length is a preset synchronization data symbol length;
the step of synchronously processing the data sequence to be processed to obtain a signal to be superimposed includes: intercepting a data sequence with a third preset length from the data sequence to be processed as a data sequence to be synchronized; wherein, the third preset length is the product of the preset synchronous data symbol length and 2; determining a rising edge position by carrying out sliding correlation calculation on the data sequence to be synchronized and the local synchronous code sequence; taking the rising edge position as a starting position, and intercepting a data sequence with a fourth preset length from the data sequence to be processed as a signal to be superimposed; wherein the fourth preset length is the product of the preset synchronization data symbol length and the preset synchronization data symbol number;
the performing time domain mixing and overlapping processing on the signal to be overlapped to obtain a symbol reference signal includes: sequentially decomposing the signals to be superimposed into P signals with different time periods and the same length according to time sequence, wherein P is the number of the preset synchronous data symbols; superposing the decomposed signals with the same length, and taking an average value to obtain an average value signal; and carrying out data extraction on the mean value signal with a preset synchronous extraction step length to obtain a symbol reference signal.
2. The method as recited in claim 1, further comprising:
screening the data sequence to be processed according to the ultra-wideband standard protocol, and determining the actual position of each positive pulse and the actual position of each negative pulse in the data sequence to be processed;
superposing all positive pulses in the data sequence to be processed, averaging the superposed positive pulses to obtain a first reference signal, and performing modulo and maximum value operation on the first reference signal to obtain the reference positions of a plurality of positive pulses; superposing all negative pulses in the data sequence to be processed, averaging the superposed negative pulses to obtain a second reference signal, and performing modulo and maximum value operation on the second reference signal to obtain the reference positions of a plurality of negative pulses;
subtracting the actual position of each positive pulse from the corresponding reference position to obtain a plurality of positive pulse position differences, and taking each positive pulse position difference as a first chip jitter of the corresponding positive pulse; and subtracting the actual position of each negative pulse from the corresponding reference position to obtain a plurality of negative pulse position differences, and taking each negative pulse position difference as a second chip jitter corresponding to the negative pulse.
3. The method of claim 1, wherein deriving symbol jitter from the sequence of data to be processed, the symbol reference signal, and a reference position for each symbol of the ultra-wideband signal determined by an ultra-wideband standard protocol, comprises:
extracting a data sequence with a fifth preset length from the data sequence to be processed by taking the rising edge position as a starting position to serve as a data sequence to be correlated;
determining an actual position of each symbol of the ultra-wideband signal by performing sliding correlation calculation on the data sequence to be correlated and the symbol reference signal;
subtracting the actual position of each symbol from the corresponding reference position to obtain a plurality of symbol position differences, and taking each symbol position difference as symbol jitter of the corresponding symbol.
4. A computing device for ultra-wideband signal dithering, comprising:
the interpolation module is configured to perform limited length selection on the original ultra-wideband signals, perform interpolation processing on the ultra-wideband signals obtained by selection, and perform selection arrangement on the interpolated data to obtain a data sequence to be processed; the method comprises the steps of selecting the original ultra-wideband signal in a limited length, performing interpolation processing on the selected ultra-wideband signal, and performing selection arrangement on the interpolated data to obtain a data sequence to be processed, wherein the method comprises the following steps: sequentially selecting from preset positions of an original ultra-wideband signal to obtain M-1 data sequences, and respectively carrying out interpolation processing on the M-1 data sequences to obtain M-1 data to be processed; wherein M is the number of preconfigured symbols, Q is the length of each data sequence; sequentially arranging the M-1 data to be processed according to a preset symbol sequence to obtain a data sequence to be processed; any one of the data sequences is subjected to interpolation processing, which comprises the following steps: performing fast Fourier transform on the data sequence to obtain a frequency domain signal; inserting a first full 0 sequence with a preset length in the middle of the frequency domain signal, and then performing inverse fast Fourier transform to obtain a time domain signal; the first preset length is the product of a first numerical value and Q, and the first numerical value is the preset oversampling multiplying power minus 1; intercepting a data sequence with a second preset length from the time domain signal to obtain data to be processed; wherein the second preset length is a preset synchronization data symbol length;
the synchronization module is configured to perform synchronization processing on the data sequence to be processed to obtain a signal to be superimposed; the step of synchronously processing the data sequence to be processed to obtain a signal to be superimposed includes: intercepting a data sequence with a third preset length from the data sequence to be processed as a data sequence to be synchronized; wherein, the third preset length is the product of the preset synchronous data symbol length and 2; determining a rising edge position by carrying out sliding correlation calculation on the data sequence to be synchronized and the local synchronous code sequence; taking the rising edge position as a starting position, and intercepting a data sequence with a fourth preset length from the data sequence to be processed as a signal to be superimposed; wherein the fourth preset length is the product of the preset synchronization data symbol length and the preset synchronization data symbol number;
the superposition module is configured to perform time domain mixing superposition processing on the signals to be superimposed to obtain symbol reference signals; the performing time domain mixing and overlapping processing on the signal to be overlapped to obtain a symbol reference signal includes: sequentially decomposing the signals to be superimposed into P signals with different time periods and the same length according to time sequence, wherein P is the number of the preset synchronous data symbols; superposing the decomposed signals with the same length, and taking an average value to obtain an average value signal; data extraction is carried out on the mean value signal according to a preset synchronous extraction step length, and a symbol reference signal is obtained;
and the first calculation module is configured to obtain symbol jitter according to the data sequence to be processed, the symbol reference signal and the reference position of each symbol of the ultra-wideband signal, which is determined by an ultra-wideband standard protocol.
5. An electronic device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 3 when the computer program is executed.
6. A storage medium storing a computer program, which when executed by a processor performs the steps of the method according to any one of claims 1 to 3.
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