CN111726793A - Timing deviation compensation method and device and electronic equipment - Google Patents
Timing deviation compensation method and device and electronic equipment Download PDFInfo
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Abstract
The embodiment of the disclosure provides a timing deviation compensation method, a timing deviation compensation device and electronic equipment, which are applied to a radio frequency signal timing deviation compensation scene in a Bluetooth system enhanced rate mode and belong to the technical field of signal processing. The method comprises the following steps: acquiring a signal to be processed corresponding to a current compensation process, wherein each compensation process corresponds to a target timing adjustment position and a target timing deviation estimation; intercepting a signal to be processed according to the target timing adjustment position to obtain a target adjustment signal; and carrying out timing deviation compensation on the target signal according to the target timing deviation estimation to obtain a target compensation signal. The compensated signal timing deviation is reduced, so that the subsequent timing deviation estimation precision is improved, the subsequent filter is used for further improving the estimation precision of the timing deviation, and finally the timing deviation and the timing adjustment position are sent to the compensator to form a closed loop structure. And the timing deviation is accurately tracked, so that the demodulation requirements under different scenes are met.
Description
Technical Field
The present disclosure relates to the field of signal processing technologies, and in particular, to a timing offset compensation method and apparatus, and an electronic device.
Background
An Enhanced Data Rate (EDR) mode of a bluetooth system transmits Data by adopting a differential 8psk modulation mode, and the modulation mode has a very small peak-to-average power ratio and can reduce the performance requirement on a linear interval of a radio frequency power amplifier. However, since the transmission duration of the EDR mode is long, the EDR mode is very sensitive to the timing deviation of the system, and the timing deviation must be within a tolerable range of a receiver through a timing deviation estimation and compensation technology, so as to ensure the correct transmission of data.
In the existing bluetooth system, in order to demodulate an 8psk signal, two synchronization sequences, namely, an intercept code and a rate enhancement synchronization EDR synchronization, are used to determine a starting position of the signal, which is also called a timing position, and a difference between the starting position and an ideal starting position is called a timing offset. For a long packet in an EDR mode, since the transmission duration is as long as 2722us, the timing deviation will have a problem of error accumulation when the crystal oscillator precision of the receiver is not high, and finally the demodulation requirement of 8psk cannot be met. To solve such problems, a high-precision crystal oscillator is used to reduce the magnitude of the cumulative error of the timing deviation. This estimation method requires a crystal oscillator with high accuracy, resulting in an increase in hardware cost.
Therefore, the existing timing deviation compensation method has the technical problem of high hardware cost.
Disclosure of Invention
In view of the above, embodiments of the present disclosure provide a timing offset compensation method, a timing offset compensation apparatus, and an electronic device, which at least partially solve the problems in the prior art.
In a first aspect, an embodiment of the present disclosure provides a timing offset compensation method, which is applied to a radio frequency signal timing offset compensation scenario in a bluetooth system enhanced rate mode, and the method includes:
acquiring a signal to be processed corresponding to a current compensation process, wherein each compensation process corresponds to a target timing adjustment position and a target timing deviation estimation;
intercepting the signal to be processed according to the target timing adjustment position to obtain a target adjustment signal;
and carrying out timing deviation compensation on the target signal according to the target timing deviation estimation to obtain a target compensation signal.
According to a specific implementation manner of the embodiment of the present disclosure, if the current compensation flow is a non-initial compensation flow, the target timing adjustment position and the target timing offset estimation corresponding to the current compensation flow are the updated timing adjustment position and the updated timing offset estimation obtained by the previous compensation flow; and the number of the first and second groups,
after the step of performing timing offset compensation on the target signal according to the target timing offset estimate to obtain a target compensation signal, the method further includes:
performing timing deviation estimation by using the target compensation signal to obtain process timing deviation estimation;
and filtering the process timing deviation estimation to obtain an updated timing deviation estimation and an updated timing adjustment position, wherein the updated timing deviation estimation and the updated timing adjustment position are respectively used as the timing deviation estimation and the timing adjustment position corresponding to the next compensation process.
According to a specific implementation manner of the embodiment of the present disclosure, if the current compensation process is an initial compensation process, the target timing adjustment position corresponding to the current compensation process is a preset initial position, and the target timing offset is estimated to be zero.
According to a specific implementation manner of the embodiment of the present disclosure, the step of intercepting the signal to be processed according to the target timing adjustment position to obtain a target adjustment signal includes:
and intercepting the signals to be processed X [0], X [1], X [2]. X [ n ] according to the target timing adjustment position to obtain the target adjustment signals X [ i-2], X [ i-1], X [ i ], and X [ i +1 ].
According to a specific implementation manner of the embodiment of the present disclosure, the step of performing timing offset compensation on the target signal according to the target timing offset estimation to obtain the target compensation signal includes:
by the formula
Realizing timing deviation compensation on the target signal; wherein the content of the first and second substances,
h is the coefficient matrix of the time-varying filter,
representing the target timing offset estimate, y [ i ]]Representing the target compensation signal.
According to a specific implementation manner of the embodiment of the present disclosure, the step of obtaining a process timing offset estimation by using the target compensation signal to perform timing offset estimation includes:
according to the formula
Deriving the process timing offset estimate
Wherein the content of the first and second substances,
re (x) denotes the real part of the complex number x, im (x) denotes the imaginary part of the complex number x, sign (x) denotes the result 1 if x is positive, or-1 if x is negative, (x)*Which represents the conjugation of a complex number x.
According to a specific implementation manner of the embodiment of the present disclosure, the step of performing filtering processing on the process timing offset estimation to obtain an updated timing offset estimation and an updated timing adjustment position includes:
estimating the process timing offset to
Substitution formula
p1[i]＝e[i]*0.01
p2[i]＝p2[i-1]+e[i]*0.001
reg[i]＝reg[i-1]+2*(1+p1[i]+p2[i])
ds[i]＝floor(reg[i])
reg[i]＝reg[i]％1
Filtering to obtain updated timing deviation estimate
And updating the timing adjustment position ds [ i ]](ii) a Wherein floor (x) indicates that x is rounded down.
According to a specific implementation manner of the embodiment of the present disclosure, the step of obtaining the to-be-processed signal corresponding to the current compensation process includes:
receiving a radio frequency signal;
and sampling the radio frequency signal at 2 times of the symbol rate to obtain the signal to be processed.
In a second aspect, an embodiment of the present disclosure provides a timing deviation compensation apparatus, which is applied to a radio frequency signal timing deviation compensation scenario in an enhanced rate mode of a bluetooth system, and the apparatus includes:
the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a signal to be processed corresponding to a current compensation process, and each compensation process corresponds to a target timing adjustment position and a target timing deviation estimation;
the intercepting module is used for intercepting the signal to be processed according to the target timing adjusting position to obtain a target adjusting signal;
and the compensation module is used for carrying out timing deviation compensation on the target signal according to the target timing deviation estimation to obtain a target compensation signal.
In a third aspect, an embodiment of the present disclosure further provides an electronic device, where the electronic device includes:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the timing offset compensation method of the first aspect or any implementation manner of the first aspect.
In a fourth aspect, the disclosed embodiments also provide a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the timing offset compensation method of the first aspect or any implementation manner of the first aspect.
In a fifth aspect, the disclosed embodiments also provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the timing offset compensation method of the first aspect or any of the implementations of the first aspect.
The timing deviation compensation scheme in the embodiment of the disclosure is applied to a radio frequency signal timing deviation compensation scene in a Bluetooth system enhanced rate mode. The timing deviation compensator is used for timing deviation compensation, the timing deviation of the compensated signal is reduced, the subsequent timing deviation estimation precision is improved, the subsequent filter is used for further improving the estimation precision of the timing deviation, and finally the timing deviation and the timing adjustment position are sent into the compensator to form a closed-loop structure. Compared with the timing deviation estimation technology of an open-loop structure, the method can accurately track the timing deviation, thereby meeting the demodulation requirements under different scenes.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a timing offset compensation method according to an embodiment of the disclosure;
fig. 2 is a schematic flow chart of another timing offset compensation method provided in the embodiment of the present disclosure;
fig. 3 is a schematic flow chart of another timing offset compensation method provided in the embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of another timing deviation compensation apparatus provided in the embodiment of the present disclosure;
fig. 5 is a schematic view of an electronic device provided in an embodiment of the present disclosure.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
Referring to fig. 1, a flow chart of a timing offset compensation method provided in the embodiment of the present disclosure is schematically illustrated, and is applied to a radio frequency signal timing offset compensation scenario in a bluetooth system enhanced rate mode. As shown in fig. 1, the method mainly comprises the following steps:
s101, acquiring a signal to be processed corresponding to a current compensation process, wherein each compensation process corresponds to a target timing adjustment position and a target timing deviation estimation;
the timing offset compensation method provided by the embodiment is applied to timing offset compensation of radio frequency signals in the Bluetooth transmission process. The provided timing deviation compensation method is a closed loop compensation scheme comprising a plurality of sequential continuous compensation processes, and related parameters are transmitted between adjacent compensation processes to gradually improve the timing deviation compensation effect of the subsequent compensation processes. A compensation flow will be specifically explained below.
Firstly, a signal to be processed corresponding to a current compensation flow is obtained, and the current compensation flow can be an initial compensation flow when timing compensation is performed at the beginning in the whole data transmission process, and can also be other compensation flows after the initial compensation flow. Each compensation process corresponds to a timing adjustment position and a timing offset estimate for timing offset compensation processing in the compensation process. And defining the timing adjustment position corresponding to the current compensation process as a target timing adjustment position, and defining the corresponding timing deviation estimation as a target timing deviation estimation.
Optionally, according to a specific implementation manner of the embodiment of the present disclosure, the step of obtaining the to-be-processed signal corresponding to the current compensation process may include:
receiving a radio frequency signal;
and sampling the radio frequency signal at 2 times of the symbol rate to obtain the signal to be processed.
In order to satisfy the Nyquist criterion, the radio frequency signal is sampled by 2 times or more than 2 times of symbol rate to obtain the signal to be processed, which can be marked as x [0], x [1], x [ 2.. x [ n ].
S102, intercepting the signal to be processed according to the target timing adjusting position to obtain a target adjusting signal;
and after the signal to be processed is obtained, intercepting the signal to be processed according to a target adjustment position corresponding to the current compensation process, and defining the obtained signal as a target adjustment signal. Alternatively, the target adjustment signal may be denoted as X ═ X [ i-2], X [ i-1], X [ i ], X [ i +1 ].
And S103, performing timing deviation compensation on the target adjusting signal according to the target timing deviation estimation to obtain a target compensation signal.
After the signal to be processed is obtained by interception, the timing deviation compensation can be performed on the target adjustment signal according to the target timing deviation estimation corresponding to the current compensation process, and the compensated signal is defined as a target compensation signal. The target compensation signal may be denoted as y i.
According to a specific implementation manner of the embodiment of the present disclosure, the step of performing timing offset compensation on the target signal according to the target timing offset estimation to obtain the target compensation signal may specifically include:
by the formula
Realizing timing deviation compensation on the target signal; wherein the content of the first and second substances,
h is the coefficient matrix of the time-varying filter,
representing a target timing offset estimate.
In addition, considering that the timing offset estimation method provided by the present embodiment is a closed-loop continuous signal processing flow, the following further defines the associated parameter transmission process between adjacent compensation flows.
According to a specific implementation manner of the embodiment of the present disclosure, if the current compensation process is an initial compensation process, the target timing adjustment position corresponding to the current compensation process is a preset initial position, and the target timing offset is estimated to be zero.
In this embodiment, when the current compensation process is the initial compensation process, the target timing offset estimation is directly set to zero, and a corresponding target timing adjustment position is preset.
According to another specific implementation manner of the embodiment of the present disclosure, if the current compensation flow is a non-initial compensation flow, the target timing adjustment position and the target timing offset estimation corresponding to the current compensation flow are the updated timing adjustment position and the updated timing offset estimation obtained by the previous compensation flow; and the number of the first and second groups,
as shown in fig. 2, after the step of compensating the timing offset of the target signal according to the target timing offset estimation to obtain the target compensation signal, the method further includes:
s201, performing timing deviation estimation by using the target compensation signal to obtain process timing deviation estimation;
s202, filtering the process timing deviation estimation to obtain an updated timing deviation estimation and an updated timing adjustment position, which are respectively used as the timing deviation estimation and the timing adjustment position corresponding to the next compensation process.
The present embodiment is limited to the parameter transfer between the other compensation processes after the initial compensation process. Specifically, as shown in fig. 2 and 3, after the timing offset compensation of the current compensation process is completed, the compensated target compensation signal is used to perform timing offset estimation to obtain a process timing offset estimation, and the process timing offset estimation is sent to a filter to perform filtering processing, so that an updated timing offset estimation and an updated timing adjustment position can be obtained and used as the timing offset estimation and the timing adjustment position corresponding to the next compensation process.
Specifically, the step of calculating the process timing offset estimation may include:
according to the formula
Deriving the process timing offset estimate
Wherein the content of the first and second substances,
re (x) denotes the real part of the complex number x, im (x) denotes the imaginary part of the complex number x, sign (x) denotes the result 1 if x is positive, or-1 if x is negative, (x)*Which represents the conjugation of a complex number x.
Accordingly, the steps of calculating an updated timing offset estimate and updating the timing adjustment location may include:
estimating the process timing offset
Substitution formula
p1[i]＝e[i]*0.01
p2[i]＝p2[i-1]+e[i]*0.001
reg[i]＝reg[i-1]+2*(1+p1[i]+p2[i])
ds[i]＝floor(reg[i])
reg[i]＝reg[i]％1
Filtering to obtain updated timing deviation estimate
And updating the timing adjustment position ds [ i ]](ii) a Wherein floor (x) indicates that x is rounded down.
Then, as shown in the following process, the updated timing offset obtained in the compensation process is estimated
And updating the timing adjustment position ds [ i ]]The method proceeds to step S101, using the signal x [ i + ds [ i ] to be processed]]，x[i+1+ds[i]]，x[i+2+ds[i]]，x[i+3+ds[i]]Obtaining a compensation signal y [ i +1] of a subsequent compensation process]And update timing offset
And updating the timing adjustment position ds [ i +1]]And sequentially circulating until the timing deviation estimation and compensation work of all received signals is finished.
In summary, the timing offset compensation method in the embodiment of the present disclosure is applied to a radio frequency signal timing offset compensation scenario in the enhanced rate mode of the bluetooth system. The timing deviation compensator is used for timing deviation compensation, the timing deviation of the compensated signal is reduced, the subsequent timing deviation estimation precision is improved, the subsequent filter is used for further improving the estimation precision of the timing deviation, and finally the timing deviation and the timing adjustment position are sent into the compensator to form a closed-loop structure. Compared with the timing deviation estimation technology of an open-loop structure, the method can accurately track the timing deviation, thereby meeting the demodulation requirements under different scenes.
Corresponding to the above method embodiment, referring to fig. 4, the embodiment of the present disclosure further provides a timing deviation compensation apparatus 40, which is applied to a radio frequency signal timing deviation compensation scenario in the enhanced rate mode of the bluetooth system. As shown in fig. 4, the apparatus 40 mainly includes:
an obtaining module 401, configured to obtain a signal to be processed corresponding to a current compensation process, where each compensation process corresponds to a target timing adjustment position and a target timing deviation estimation;
an intercepting module 402, configured to intercept the signal to be processed according to the target timing adjustment position to obtain a target adjustment signal;
and a compensation module 403, configured to perform timing deviation compensation on the target signal according to the target timing deviation estimation, so as to obtain a target compensation signal.
The apparatus shown in fig. 4 can correspondingly execute the content in the above method embodiment, and details of the part not described in detail in this embodiment refer to the content described in the above method embodiment, which is not described again here.
Referring to fig. 5, an embodiment of the present disclosure also provides an electronic device 50, including:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the timing offset compensation method of the method embodiments described above.
The disclosed embodiments also provide a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the timing offset compensation method in the aforementioned method embodiments.
The disclosed embodiments also provide a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the timing offset compensation method of the aforementioned method embodiments.
Referring now to FIG. 5, a schematic diagram of an electronic device 50 suitable for use in implementing embodiments of the present disclosure is shown. The electronic devices in the embodiments of the present disclosure may include, but are not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., car navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. The electronic device shown in fig. 5 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present disclosure.
As shown in fig. 5, electronic device 50 may include a processing means (e.g., central processing unit, graphics processor, etc.) 501 that may perform various appropriate actions and processes in accordance with a program stored in a Read Only Memory (ROM)502 or a program loaded from a storage means 508 into a Random Access Memory (RAM) 503. In the RAM 503, various programs and data necessary for the operation of the electronic apparatus 50 are also stored. The processing device 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. An input/output (I/O) interface 505 is also connected to bus 504.
Generally, the following devices may be connected to the I/O interface 505: input devices 506 including, for example, a touch screen, touch pad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 507 including, for example, a Liquid Crystal Display (LCD), speakers, vibrators, and the like; storage devices 508 including, for example, magnetic tape, hard disk, etc.; and a communication device 509. The communication means 509 may allow the electronic device 50 to communicate with other devices wirelessly or by wire to exchange data. While the figures illustrate an electronic device 50 having various means, it is to be understood that not all illustrated means are required to be implemented or provided. More or fewer devices may alternatively be implemented or provided.
In particular, according to an embodiment of the present disclosure, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present disclosure include a computer program product comprising a computer program embodied on a computer readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network via the communication means 509, or installed from the storage means 508, or installed from the ROM 502. The computer program performs the above-described functions defined in the methods of the embodiments of the present disclosure when executed by the processing device 501.
It should be noted that the computer readable medium in the present disclosure can be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present disclosure, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In contrast, in the present disclosure, a computer readable signal medium may comprise a propagated data signal with computer readable program code embodied therein, either in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, optical cables, RF (radio frequency), etc., or any suitable combination of the foregoing.
The computer readable medium may be embodied in the electronic device; or may exist separately without being assembled into the electronic device.
The computer readable medium carries one or more programs which, when executed by the electronic device, enable the electronic device to implement the schemes provided by the method embodiments.
Alternatively, the computer readable medium carries one or more programs, which when executed by the electronic device, enable the electronic device to implement the schemes provided by the method embodiments.
Computer program code for carrying out operations for aspects of the present disclosure may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + +, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units described in the embodiments of the present disclosure may be implemented by software or hardware. Where the name of an element does not in some cases constitute a limitation on the element itself.
It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. A timing deviation compensation method is applied to a radio frequency signal timing deviation compensation scene in an enhanced rate mode of a Bluetooth system, and comprises the following steps:
acquiring a signal to be processed corresponding to a current compensation process, wherein each compensation process corresponds to a target timing adjustment position and a target timing deviation estimation;
intercepting the signal to be processed according to the target timing adjustment position to obtain a target adjustment signal;
and carrying out timing deviation compensation on the target signal according to the target timing deviation estimation to obtain a target compensation signal.
2. The method of claim 1, wherein if the current compensation process is a non-initial compensation process, the target timing adjustment position and the target timing offset estimate corresponding to the current compensation process are the updated timing adjustment position and the updated timing offset estimate obtained from the previous compensation process; and the number of the first and second groups,
after the step of performing timing offset compensation on the target signal according to the target timing offset estimate to obtain a target compensation signal, the method further includes:
performing timing deviation estimation by using the target compensation signal to obtain process timing deviation estimation;
and filtering the process timing deviation estimation to obtain an updated timing deviation estimation and an updated timing adjustment position, wherein the updated timing deviation estimation and the updated timing adjustment position are respectively used as the timing deviation estimation and the timing adjustment position corresponding to the next compensation process.
3. The method according to claim 2, wherein if the current compensation process is an initial compensation process, the target timing adjustment position corresponding to the current compensation process is a preset initial position, and the target timing offset is estimated to be zero.
4. The method according to claim 3, wherein the step of intercepting the signal to be processed according to the target timing adjustment position to obtain a target adjustment signal comprises:
and intercepting the signals to be processed X [0], X [1], X [2]. X [ n ] according to the target timing adjustment position to obtain the target adjustment signals X [ i-2], X [ i-1], X [ i ], and X [ i +1 ].
5. The method of claim 4, wherein the step of compensating the target signal for the timing offset based on the target timing offset estimate to obtain a target compensated signal comprises:
by the formula
Realizing timing deviation compensation on the target signal; wherein the content of the first and second substances,
h is the coefficient matrix of the time-varying filter,
representing the target timing offset estimate, y [ i ]]Representing the target compensation signal.
6. The method of claim 5, wherein the step of using the target compensation signal for timing offset estimation to obtain a process timing offset estimate comprises:
according to the formula
Deriving the process timing offset estimate
Wherein the content of the first and second substances,
re (x) denotes the real part of the complex number x, im (x) denotes the imaginary part of the complex number x, sign (x) denotes the result 1 if x is positive, or-1 if x is negative, (x)*Which represents the conjugation of a complex number x.
7. The method of claim 6, wherein the step of filtering the process timing offset estimate to obtain an updated timing offset estimate and an updated timing adjustment position comprises:
estimating the process timing offset
Substitution formula
p1[i]＝e[i]*0.01
p2[i]＝p2[i-1]+e[i]*0.001
reg[i]＝reg[i-1]+2*(1+p1[i]+p2[i])
ds[i]＝floor(reg[i])
reg[i]＝reg[i]％1
Filtering to obtain updated timing deviation estimate
And updating the timing adjustment position ds [ i ]](ii) a Wherein floor (x) indicates that x is rounded down.
8. The method according to any one of claims 1 to 7, wherein the step of obtaining the signal to be processed corresponding to the current compensation process comprises:
receiving a radio frequency signal;
and sampling the radio frequency signal at 2 times of the symbol rate to obtain the signal to be processed.
9. A timing deviation compensation apparatus, for use in a radio frequency signal timing deviation compensation scenario in an enhanced rate mode of a bluetooth system, the apparatus comprising:
the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a signal to be processed corresponding to a current compensation process, and each compensation process corresponds to a target timing adjustment position and a target timing deviation estimation;
the intercepting module is used for intercepting the signal to be processed according to the target timing adjusting position to obtain a target adjusting signal;
and the compensation module is used for carrying out timing deviation compensation on the target signal according to the target timing deviation estimation to obtain a target compensation signal.
10. An electronic device, characterized in that the electronic device comprises:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the timing skew compensation method of any of the preceding claims 1-8.
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