CN115987729B - Phase alignment method, phase alignment apparatus, and computer-readable storage medium - Google Patents
Phase alignment method, phase alignment apparatus, and computer-readable storage medium Download PDFInfo
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Abstract
The application provides a phase alignment method, a phase alignment device and a computer readable storage medium, wherein the phase alignment method comprises the following steps: performing conjugate processing on the expression of the feedback signal to obtain an expression of a first target signal, wherein the feedback signal is a feedback measurement signal of the transmitting signal; performing preset processing on the expression of the transmitted signal and the expression of the first target signal to obtain an expression of the second target signal, wherein the preset processing at least comprises denoising processing; the phases of the transmit signal and the feedback signal are aligned according to the expression of the second target signal and the expression of the feedback signal. The scheme occupies less logic resources of hardware, does not increase the area of a corresponding chip, and ensures that the phases of the transmitting signal and the feedback signal can be aligned relatively simply, thereby solving the problem that the hardware occupies more logic resources when the phases of the transmitting signal and the feedback signal are aligned in the prior art.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a phase alignment method, a phase alignment apparatus, a computer readable storage medium, and a processor.
Background
Wireless communications are continually evolving to support more users and higher transmission rates. Since spectrum resources of wireless communication are scarce, in order to improve spectrum efficiency, a high-order modulation and orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, abbreviated as OFDM) technology is widely used in wireless communication.
However, the implementation of this spectrum efficiency is based on the performance of a relatively strict radio frequency front end, and a Power Amplifier (PA) located at the transmitter is a key device of the transmitter. PA generally operates in the saturation region to achieve higher power efficiency. In practice, the communication performance will be affected by the large amount of nonlinear spectrum generated by the PA operating in the saturation region. Digital Pre-Distortion (DPD) techniques can be used to Pre-distort the transmit signal in the Digital portion of the rf front end so that the PA output exhibits a linear characteristic. In the DPD algorithm, the transmit signal X and the feedback signal Y are required 1 Power alignment, delay alignment, and phase alignment are performed and are typically implemented in digital hardware logic in a chip. The alignment method has high limitation on hardware resources.
Therefore, there is a need for a method of phase aligning a transmit signal and a feedback signal while occupying less hardware logic resources.
Disclosure of Invention
The application mainly aims to provide a phase alignment method, a phase alignment device, a computer readable storage medium and a processor, so as to solve the problem that more logic resources of hardware are occupied when a transmitting signal and a feedback signal are subjected to phase alignment in the prior art.
According to an aspect of the embodiment of the present application, there is provided a phase alignment method applied in a transmitter, the phase alignment method including: performing conjugate processing on the expression of the feedback signal to obtain an expression of a first target signal, wherein the feedback signal is a feedback measurement signal of the transmitting signal; performing preset processing on the expression of the transmitting signal and the expression of the first target signal to obtain an expression of a second target signal, wherein the preset processing at least comprises denoising processing; and aligning the phases of the transmitting signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal.
Optionally, performing predetermined processing on the expression of the transmission signal and the expression of the first target signal to obtain an expression of a second target signal, including: by using And->Calculated to obtainWherein X is the transmitting signal, A is the amplitude of the transmitting signal, phi x For the phase of the transmitted signal, Y 2 For the first target signal, B is the amplitude of the first target signal, -phi y A phase of the first target signal; for->And denoising to obtain the expression of the second target signal.
Alternatively, toDenoising to obtain an expression of the second target signal, including: for->Performing shift processing to obtain multiple +.>Wherein E is i E is shifted; for a plurality of->Performing smoothing processing to obtain expression corresponding to the second target signal>Wherein C is the amplitude of the second target signal, phi x -φ y Is the phase of the second target signal.
Alternatively, toPerforming shift processing to obtain multiple +.>Comprising the following steps: determining the number of bits of the target adjustment amplitude and calculating the number of bits of the target adjustment amplitude and +.>Obtaining a first numerical value by the difference of the digits of the amplitude values; will->The digits of the amplitude of (a) are respectively moved forward untilThe number of times reaching said first value, wherein +.>Every time the number of bits of the amplitude of (a) is shifted, the bit is shifted forward, and the bit is shifted by one bit >When the number of bits of the amplitude of (a) is shifted one bit forward, a corresponding one is obtained>
Optionally, aligning phases of the transmit signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal includes: calculation ofAnd->Is calculated to obtain Y aligned ＝B·C·e jφx Wherein->For the second target signal, C is the amplitude of the second target signal, phi x -φ y For the phase of the second target signal, Y 1 For the feedback signal phi y And B is the amplitude of the feedback signal respectively for the phase of the feedback signal.
Optionally, after aligning phases of the transmission signal and the feedback signal according to the second target signal and the feedback signal, the phase alignment method further includes: y is set to aligned ＝B·C·e jφx And x=a.e jφx Performing power alignment, wherein X is the transmitting signal, A is the amplitude of the transmitting signal, phi x Is the phase of the transmitted signal.
Optionally, before performing conjugation processing on the feedback signal to obtain the first target signal, the phase alignment method further includes: and performing time delay alignment on the transmitting signal and the feedback signal.
According to another aspect of the embodiment of the present invention, there is also provided a phase alignment apparatus, including: the conjugation processing unit is used for carrying out conjugation processing on the expression of the feedback signal to obtain the expression of the first target signal, wherein the feedback signal is a feedback measurement signal of the transmitting signal; a predetermined processing unit, configured to perform predetermined processing on the expression of the transmission signal and the expression of the first target signal, to obtain an expression of a second target signal, where the predetermined processing includes at least denoising processing; and the phase alignment unit is used for aligning the phases of the transmitting signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal.
According to still another aspect of the embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program performs any one of the phase alignment methods.
According to still another aspect of the embodiment of the present invention, there is further provided a processor, where the processor is configured to execute a program, and when the program runs, perform any one of the phase alignment methods.
In the phase alignment method, first, an expression of a first target signal is obtained by performing conjugate processing on an expression of a feedback signal; then, carrying out preset processing on the expression of the transmitted signal and the expression of the first target signal to obtain a second target signal; finally, aligning the phases of the transmission signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal. Compared with the prior art, the method has the advantages that the angle of the transmitting signal and the angle of the feedback signal are calculated, the angle difference between the transmitting signal and the angle difference between the feedback signal are processed, and finally, the phase adjustment factor is calculated according to Cordic (coordinate rotation digital calculation method, coordinate Rotation Digital Computer), or the phase adjustment factor is obtained according to conjugate multiplication of the transmitting signal and the feedback signal, compared with the phase adjustment factor obtained by table lookup, the method only needs to conduct preset processing on the expression of the transmitting signal and the first target signal to obtain the second target signal, and then, the phase alignment of the transmitting signal and the feedback signal can be achieved according to the expression of the second target signal and the expression of the feedback signal. The scheme does not need to obtain the phase adjustment factor through Cordic calculation or table lookup, so that the scheme occupies less logic resources of hardware, the area of a corresponding chip is not increased, and the phase alignment of a transmitting signal and a feedback signal can be ensured to be simpler, thereby solving the problem that the prior art occupies more logic resources of hardware when the transmitting signal and the feedback signal are subjected to phase alignment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 shows a flow chart of a phase alignment method according to one embodiment of the application;
fig. 2 shows a schematic structure of a phase alignment apparatus according to an embodiment of the present application;
fig. 3 shows a schematic configuration of DPD alignment processing according to one embodiment of the present application;
FIG. 4 shows a schematic phase-aligned structure of the prior art;
FIG. 5 shows another phase-aligned schematic of the prior art;
FIG. 6 shows a schematic diagram of yet another phase alignment configuration of the prior art;
fig. 7 shows a schematic diagram of a phase-aligned structure according to an embodiment of the application.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the application herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As described in the background art, in the prior art, when the phase alignment is performed on the transmission signal and the feedback signal, a large amount of logic resources are occupied in hardware, and in order to solve the above problem, in an exemplary embodiment of the present application, a phase alignment method, a phase alignment apparatus, a computer readable storage medium and a processor are provided.
According to an embodiment of the present application, there is provided a phase alignment method.
Fig. 1 is a flow chart of a phase alignment method according to an embodiment of the present application. The phase alignment method is applied to a transmitter, as shown in fig. 1, and comprises the following steps:
step S101, performing conjugate processing on an expression of a feedback signal to obtain an expression of a first target signal, wherein the feedback signal is a feedback measurement signal of a transmitting signal;
step S102, carrying out preset processing on the expression of the transmission signal and the expression of the first target signal to obtain the expression of the second target signal, wherein the preset processing at least comprises denoising processing;
and step S103, aligning the phases of the transmitting signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal.
In the above phase alignment method, first, an expression of a first target signal is obtained by performing conjugate processing on an expression of a feedback signal; then, carrying out preset processing on the expression of the emission signal and the expression of the first target signal to obtain a second target signal; finally, the phases of the transmission signal and the feedback signal are aligned according to the expression of the second target signal and the expression of the feedback signal. Compared with the prior art, the method has the advantages that the angle of the transmitting signal and the angle of the feedback signal are calculated, the angle difference between the transmitting signal and the angle difference between the feedback signal are processed, and finally, the phase adjustment factor is calculated according to Cordic (coordinate rotation digital calculation method, coordinate Rotation Digital Computer), or the phase adjustment factor is obtained according to conjugate multiplication of the transmitting signal and the feedback signal, compared with the phase adjustment factor obtained by table lookup, the method only needs to conduct preset processing on the expression of the transmitting signal and the first target signal to obtain the second target signal, and then, the phase alignment of the transmitting signal and the feedback signal can be achieved according to the expression of the second target signal and the expression of the feedback signal. The scheme does not need to obtain the phase adjustment factor through Cordic calculation or table lookup, so that the scheme occupies less logic resources of hardware, the area of a corresponding chip is not increased, and the phase alignment of a transmitting signal and a feedback signal can be ensured to be simpler, thereby solving the problem that the prior art occupies more logic resources of hardware when the transmitting signal and the feedback signal are subjected to phase alignment.
Specifically, the above-described predetermined process may also be a multiplication process in which an expression of the transmission signal is directly multiplied by an expression of the first target signal, and an expression of the second target signal can be obtained. In the present application, the specific method of the above-described predetermined processing is not limited, and the phase difference between the transmission signal and the feedback signal may be calculated by the expression of the transmission signal and the expression of the first target signal.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
In one embodiment of the present application, performing conjugate processing on an expression of a feedback signal to obtain an expression of a first target signal, including: by usingCalculating the expression +.>Wherein Y is 1 For the feedback signal phi y B is the amplitude of the feedback signal and the first target signal, respectively, -phi y Is the phase of the first target signal. In this embodiment, the feedback signal is calculated +. >Is calculated to obtain the expression +.>Thus, the phase difference between the transmitting signal and the feedback signal can be conveniently obtained later, namely, the phase of the second target signal can be obtained later according to the expression of the first target signal.
Specifically, in the above embodiment, the conjugation process is performed on the expression of the feedback signal, that is, the expression of the first target signal conjugated to the expression of the feedback signal is calculated.
To ensure that is obtainedThe phase of the second target signal is more accurate, and the subsequent alignment of the phases of the transmission signal and the feedback signal can be more simply performed according to the expression of the transmission signal and the expression of the second target signal, in another embodiment of the present application, the performing a predetermined process on the expression of the transmission signal and the expression of the first target signal to obtain the expression of the second target signal includes: by usingAnd->Calculated to obtainWherein X is the above-mentioned emission signal, A is the amplitude of the above-mentioned emission signal, phi x For the phase of the above-mentioned transmitted signal, Y 2 B is the amplitude of the first target signal, -phi y A phase of the first target signal; for- >And denoising to obtain the expression of the second target signal.
Specifically, in order to ensure that the phase of the obtained second target signal is accurate, in the above embodiment, the phase of the second target signal is determined byAnd denoising, so that the phase error can be reduced, the obtained second target signal is accurate, and the phase alignment of the transmitting signal and the feedback signal is realized simply and skillfully according to the transmitting signal expression and the second target signal expression.
In the practical application process, the phase difference of each sample point has a weight factor, so that in order to further ensure that the phase of the obtained second target signal is more accurate, in a further embodiment of the application, the phase difference of each sample point is equal to the phase difference of the second target signalDenoising to obtain the expression of the second target signal, including: for->Performing shift processing to obtain multiple +.>Wherein E is i E is shifted; for a plurality of->Performing smoothing processing to obtain expression corresponding to the second target signal>Wherein C is the amplitude of the second target signal, phi x -φ y Is the phase of the second target signal.
Specifically, since the phase difference of each sample is provided with a weight factor, the transmitted signal X and the feedback signal Y are further ensured 1 The phase difference of (c) is accurate, so that the amplitude of E can be shifted. For example, if the number of bits of the target adjustment amplitude is W, the amplitude of E (i.e., A.B) is adjusted to the W-bit range so that A.B reaches the maximum range that the fixed point can represent. In the actual process, one can be obtained after adjusting the amplitude of A.B onceAnd then->The phase of the second target signal can be obtained by performing the smoothing process.
To be relatively simple toShift positionIn still another embodiment of the present application, the methodPerforming shift processing to obtain multiple +.>Comprising the following steps: determining the number of bits of the target adjustment amplitude, and calculating the number of bits of the target adjustment amplitude and +.>Obtaining a first numerical value by the difference of the digits of the amplitude values; will->The respective digits of the amplitude of (a) are moved forward until the number of movements reaches the first value, wherein +_>Every time the number of bits of the amplitude of (a) is shifted, the bit is shifted forward, and the bit is shifted by one bit>When the number of bits of the amplitude of (a) is shifted one bit forward, a corresponding one is obtained>
In practical application, in the embodiment, the methodThe amplitude (i.e.A.B) of (A) is usually expressed in binary form, at +.>The number of bits whose amplitude (i.e., binary number of bits of A.B) does not reach the target adjustment amplitude can be used to adjust the current + >Each bit of the amplitude of (a) is shifted forward once (each bit of a·b is shifted forward every time a shift is made), and one +_ can be obtained every time a shift is made>
In one embodiment of the application, for a plurality ofPerforming smoothing processing to obtain expression corresponding to the second target signal>Comprising the following steps: calculating a plurality of +.>Average value of (2) to obtainIn this embodiment, a plurality of +.>The average value of the second target signal can reduce the error of the phase, and further ensure that the phase of the obtained second target signal is more accurate.
Specifically, the above-described smoothing process is not limited to calculating a plurality ofCan also be used for calculating a plurality of +.>In the present application, not to a plurality of +.>The method of performing the smoothing process is limited and may be any feasible smoothing process in the prior art.
In another embodiment of the present application, aligning phases of the transmission signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal includes: calculation ofAndis calculated to obtain Y aligned ＝B·C·e jφx Wherein->For the second target signal, C is the amplitude of the second target signal, phi x -φ y For the phase of the second target signal, Y 1 For the feedback signal phi y And B is the amplitude of the feedback signal respectively for the phase of the feedback signal. In this embodiment, by calculating +.>Andand thus the phase phi of the feedback signal y And the cancellation is performed, so that the phase alignment of the feedback signal and the transmitting signal is realized.
In order to achieve alignment of the power of the transmission signal with the power of the feedback signal, i.e. alignment of the amplitude of the transmission signal with the amplitude of the feedback signal, in a further embodiment of the application, after aligning the phases of the transmission signal and the feedback signal according to the second target signal and the feedback signal, the phase alignment method further comprises: y is set to aligned ＝B·C·e jφx And x=a.e jφx Performing power alignment, wherein X is the transmission signal, A is the amplitude of the transmission signal, phi x Is the phase of the transmitted signal.
In still another embodiment of the present application, before performing conjugation processing on the feedback signal to obtain the first target signal, the phase alignment method further includes: the time delay alignment of the transmitting signal and the feedback signal can further ensure that the phase alignment of the transmitting signal and the feedback signal is accurate.
The embodiment of the application also provides a phase alignment device, and the phase alignment device of the embodiment of the application can be used for executing the phase alignment method provided by the embodiment of the application. The following describes a phase alignment apparatus provided in an embodiment of the present application.
Fig. 2 is a schematic structural view of a phase alignment apparatus according to an embodiment of the present application. As shown in fig. 2, the phase alignment apparatus includes:
a conjugation processing unit 10, configured to perform conjugation processing on an expression of a feedback signal, to obtain an expression of a first target signal, where the feedback signal is a feedback measurement signal of the transmission signal;
a predetermined processing unit 20, configured to perform predetermined processing on the expression of the transmission signal and the expression of the first target signal, so as to obtain an expression of a second target signal, where the predetermined processing includes at least denoising processing;
a phase alignment unit 30 for aligning the phases of the transmission signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal.
In the above phase alignment device, the conjugation processing unit is configured to perform conjugation processing on the expression of the feedback signal to obtain an expression of the first target signal; the predetermined processing unit is used for carrying out predetermined processing on the expression of the emission signal and the expression of the first target signal to obtain an expression of a second target signal; the phase alignment unit is used for aligning the phases of the transmitting signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal. Compared with the prior art, the method has the advantages that the angle of the transmitting signal and the angle of the feedback signal are calculated, the angle difference between the transmitting signal and the angle difference between the feedback signal are processed, and finally, the phase adjustment factor is calculated according to Cordic (coordinate rotation digital calculation method, coordinate Rotation Digital Computer), or the phase adjustment factor is obtained according to conjugate multiplication of the transmitting signal and the feedback signal, compared with the phase adjustment factor obtained by table lookup, the method only needs to conduct preset processing on the expression of the transmitting signal and the first target signal to obtain the second target signal, and then, the phase alignment of the transmitting signal and the feedback signal can be achieved according to the expression of the second target signal and the expression of the feedback signal. The scheme does not need to obtain the phase adjustment factor through Cordic calculation or table lookup, so that the scheme occupies less logic resources of hardware, the area of a corresponding chip is not increased, and the phase alignment of a transmitting signal and a feedback signal can be ensured to be simpler, thereby solving the problem that the prior art occupies more logic resources of hardware when the transmitting signal and the feedback signal are subjected to phase alignment.
Specifically, the above-described predetermined process may also be a multiplication process in which an expression of the transmission signal is directly multiplied by an expression of the first target signal, and an expression of the second target signal can be obtained. In the present application, the specific method of the above-described predetermined processing is not limited, and the phase difference between the transmission signal and the feedback signal may be calculated by the expression of the transmission signal and the expression of the first target signal.
In one embodiment of the present application, the conjugate processing unit includes a first calculation module configured to useCalculating the expression +.>Wherein Y is 1 For the feedback signal phi y B is the amplitude of the feedback signal and the first target signal, respectively, -phi y Is the phase of the first target signal. In this embodiment, the feedback signal is calculated +.>Is calculated to obtain the expression +.>Thus, the phase difference between the transmitting signal and the feedback signal can be conveniently obtained later, namely, the phase of the second target signal can be obtained later according to the expression of the first target signal.
Specifically, in the above embodiment, the conjugation process is performed on the expression of the feedback signal, that is, the expression of the first target signal conjugated to the expression of the feedback signal is calculated.
In order to ensure that the phase of the obtained second target signal is more accurate and that the phases of the transmission signal and the feedback signal can be more simply aligned according to the expression of the transmission signal and the expression of the second target signal, in another embodiment of the present application, the predetermined processing unit includes a second computing module and a denoising processing module, where the second computing module is configured to useAnd->Calculated->Wherein X is the above-mentioned emission signal, A is the amplitude of the above-mentioned emission signal, phi x For the phase of the above-mentioned transmitted signal, Y 2 B is the amplitude of the first target signal, -phi y A phase of the first target signal; the denoising processing module is used for performing the following steps of>And denoising to obtain the expression of the second target signal.
Specifically, in order to ensure that the phase of the obtained second target signal is accurate, in the above embodimentFor a pair ofAnd denoising, so that the phase error can be reduced, the obtained second target signal is accurate, and the phase alignment of the transmitting signal and the feedback signal is realized simply and skillfully according to the transmitting signal expression and the second target signal expression.
In a practical application process, the phase difference of each sample point has a weight factor, so that in order to further ensure that the obtained phase of the second target signal (i.e. the phase difference between the feedback signal and the transmission signal) is accurate, in a further embodiment of the present application, the denoising processing module includes a shift processing sub-module and a smoothing processing sub-module, where the shift processing sub-module is configured to perform a shift processing onPerforming shift processing to obtain multiple +.>Wherein E is i E is shifted; the smoothing submodule is used for carrying out the treatment on a plurality of +.>Performing smoothing processing to obtain expression corresponding to the second target signal>Wherein C is the amplitude of the second target signal, phi x -φ y Is the phase of the second target signal.
Specifically, since the phase difference of each sample is provided with a weight factor, the transmitted signal X and the feedback signal Y are further ensured 1 The phase difference of (c) is accurate, so that the amplitude of E can be shifted. For example, if the number of bits of the target adjustment amplitude is W, the amplitude of E (i.e., A.B) is adjusted to the W-bit range so that A.B reaches the maximum range that the fixed point can represent. At the position ofThe actual process is that one can be obtained after adjusting the amplitude of A.B once And then->The phase of the second target signal can be obtained by performing the smoothing process.
To be relatively simple toIn another embodiment of the present application, the shift processing submodule includes a determining submodule and a shift submodule, where the determining submodule is used to determine a bit number of the target adjustment amplitude, and calculate a bit number of the target adjustment amplitude and ∈>Obtaining a first numerical value by the difference of the digits of the amplitude values; the shift submodule is used for making +.>The respective digits of the amplitude of (a) are moved forward until the number of movements reaches the first value, wherein +_>Every time the number of bits of the amplitude of (a) is shifted, the bit is shifted forward, and the bit is shifted by one bit>When each digit of the amplitude of (a) is moved forward by one digit, a corresponding one is obtained
In practical application, in the embodiment, the methodThe amplitude (i.e.A.B) of (A) is usually expressed in binary form, at +.>The number of bits whose amplitude (i.e., binary number of bits of A.B) does not reach the target adjustment amplitude can be used to adjust the current +>Each bit of the amplitude of (a) is shifted forward once (each bit of a·b is shifted forward every time a shift is made), and one +_ can be obtained every time a shift is made >
In one embodiment of the present application, the smoothing submodule includes a calculation submodule for calculating a plurality ofAverage value of (2) to obtain->In this embodiment, a plurality of are calculatedThe average value of the second target signal can reduce the error of the phase, and further ensure that the phase of the obtained second target signal is more accurate.
Specifically, the above-described smoothing process is not limited to calculating a plurality ofCan also be used for calculating a plurality of +.>In the present application, not to a plurality of +.>The method of performing the smoothing process is limited and may be any feasible smoothing process in the prior art.
In another embodiment of the present application, the phase alignment unit includes a third calculation module for calculatingAnd->Is calculated to obtain Y aligned ＝B·C·e jφx Wherein->For the second target signal, C is the amplitude of the second target signal, phi x -φ y For the phase of the second target signal, Y 1 For the feedback signal phi y And B is the amplitude of the feedback signal respectively for the phase of the feedback signal. In this embodiment, by calculationAnd->And thus the phase phi of the feedback signal y And the cancellation is performed, so that the phase alignment of the feedback signal and the transmitting signal is realized.
In order to achieve alignment of the power of the transmission signal with the power of the feedback signal, i.e. alignment of the amplitude of the transmission signal with the amplitude of the feedback signal, in a further embodiment of the application the phase alignment device further comprises a power alignment unit for aligning the phases of the transmission signal and the feedback signal after alignment of the phases of the transmission signal and the feedback signal based on the second target signal and the feedback signal aligned ＝B·C·e jφx And x=a.e jφx Performing power alignment, wherein X is the transmission signal, A is the amplitude of the transmission signal, phi x For the phase of the above-mentioned transmitted signal。
In still another embodiment of the present application, the phase alignment apparatus further includes a delay alignment unit, configured to delay-align the transmit signal with the feedback signal before performing conjugate processing on the feedback signal to obtain the first target signal, so as to further ensure that the transmit signal and the feedback signal are aligned in phase relatively accurately.
The phase alignment device comprises a processor and a memory, wherein the conjugate processing unit, the preset processing unit, the phase alignment unit and the like are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The kernel can be provided with one or more than one kernel, and the problem that more logic resources of hardware are occupied when the transmitting signal and the feedback signal are subjected to phase alignment in the prior art is solved by adjusting kernel parameters.
The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.
An embodiment of the present invention provides a computer-readable storage medium having stored thereon a program which, when executed by a processor, implements the above-described phase alignment method.
The embodiment of the invention provides a processor, which is used for running a program, wherein the phase alignment method is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes at least the following steps when executing the program:
step S101, performing conjugate processing on an expression of a feedback signal to obtain an expression of a first target signal, wherein the feedback signal is a feedback measurement signal of a transmitting signal;
Step S102, carrying out preset processing on the expression of the emission signal and the expression of the first target signal to obtain an expression of a second target signal, wherein the preset processing at least comprises denoising processing;
and step S103, aligning the phases of the transmitting signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal.
The device herein may be a server, PC, PAD, cell phone, etc.
The application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with at least the following method steps:
step S101, performing conjugate processing on an expression of a feedback signal to obtain an expression of a first target signal, wherein the feedback signal is a feedback measurement signal of a transmitting signal;
step S102, carrying out preset processing on the expression of the emission signal and the expression of the first target signal to obtain an expression of a second target signal, wherein the preset processing at least comprises denoising processing;
and step S103, aligning the phases of the transmitting signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal.
In order that the technical solution of the present application may be more clearly understood by those skilled in the art, the technical solution and technical effects of the present application will be described below with reference to specific embodiments.
Examples
In the DPD algorithm, as shown in fig. 3, since the gain, phase and delay of the analog circuit are unknown, a feedback signal Y fed back through PA (power amplifier) is required 1 Aligned with a transmit signal X transmitted through a digital front end module (DFE). In the prior art, the transmitted signal X and the feedback signal Y are generally aligned in the order of power alignment, time delay alignment and phase alignment 1 Power, delay and phase alignment are performed. Since power alignment, delay alignment and phase alignment are typically implemented in digital hardware on chipLogic implementations, therefore, are generally very limited in hardware resources. In order to solve the technical problem, the application provides a phase alignment method, wherein before phase alignment, a transmitting signal X and a feedback signal Y are firstly aligned 1 And performing time delay alignment, performing phase alignment, and finally performing power alignment.
For the transmission signal X and the feedback signal Y 1 Related schemes are already known in the art. For example, as shown in fig. 4, the phase alignment method first calculates a transmission signal X and a feedback signal Y, respectively 1 Is a function of the angle of (2); then, calculating the difference value of the two angles; then the angle differences of a plurality of sample points are accumulated and averaged, finally, a complex number with a model of 1 is calculated according to the phase, and then the complex number is combined with a feedback signal Y 1 Multiplying. As shown in fig. 5, fig. 5 optimizes the phase alignment method shown in fig. 4 by first calculating a transmit signal X and a feedback signal Y 1 Is the product of the conjugate of: then calculating the angle of the product, summing the same angles, accumulating and averaging, finally calculating complex number with model 1 according to the phase, and then combining with feedback signal Y 1 And multiplying. As shown in fig. 6, first, a transmission signal X and a feedback signal Y are calculated 1 Is the product of the conjugate of (2); then, the imaginary part of the product is accumulated and averaged, and finally, the phase adjustment factor is obtained by looking up a table according to the average value of the imaginary part, and the phase adjustment factor and the feedback signal Y 1 Multiplication to complete phase alignment.
In the above-described scheme, there are problems in that the consumption of hardware resources is large and the area of the corresponding chip needs to be increased. Based on the problem, the technical scheme of the application provides a phase alignment method.
As shown in fig. 7, in the technical scheme of the present application, first, the transmission signal X and the feedback signal Y are combined 1 Is multiplied by the conjugate of (a); then, the obtained product is subjected to a shift process, and a plurality of shift processes are performedAccumulating and averaging; finally, the average treatment is carried out againExpression of target signal and feedback signal Y 1 Multiplication of the transmitted signal X with the feedback signal Y can be achieved 1 Phase alignment is performed.
The specific process is as follows: the transmitted signal X is expressed as:
the feedback signal is expressed as:
the technical proposal of the application is that the transmitting signal X and the feedback signal Y are firstly transmitted 1 Time-delay aligned, and then time-delay aligned transmit signal X and feedback signal Y 1 And the conjugate multiplication of (c) is:
since the phase difference of each sample point is provided with a weight factor, in order to obtain a transmitting signal X and a feedback signal Y 1 The phase difference of (c) is accurate, so that the shift processing can be performed on E. For example, if the number of bits of the target adjustment amplitude is W, the amplitude A.B is adjusted to be the maximum range that the fixed point can represent by using the W bits as the range adjustment. That is, the number of times N of shifting the amplitude A.B of E is determined based on the binary bit number of the amplitude A.B and the bit number of the target adjustment amplitude, and the amplitude A.B of E is shifted forward N times. In the process of shifting E, one binary digit of amplitude A.B can be obtained after each shift And calculates a plurality of +.>Average value of (2) can be obtained
Will beMultiplied by the feedback signal, there are: />
Namely, the transmitting signal X and the feedback signal Y can be realized by the formula 1 Is used for the phase alignment of the optical fiber. Although the above formula is described for the transmit signal X and the feedback signal Y 1 An amplitude factor b.c is introduced during the phase alignment of (a). However, in the subsequent process of aligning the power of the transmitting signal with that of the feedback signal, the amplitude factors B.C can be counteracted, so that the scheme realizes the transmitting signal X and the feedback signal Y without additionally adding a table look-up or cordic calculation process 1 The complex algorithm process of table lookup or cordic calculation angle is avoided, and the logic resource of hardware realization is reduced.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units may be a logic function division, and there may be another division manner when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention 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. The integrated units may be implemented in hardware or in software functional units.
The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the above-mentioned method of the various embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:
1) In the phase alignment method, firstly, an expression of a first target signal is obtained by carrying out conjugate processing on an expression of a feedback signal; then, carrying out preset processing on the expression of the emission signal and the expression of the first target signal to obtain a second target signal; finally, the phases of the transmission signal and the feedback signal are aligned according to the expression of the second target signal and the expression of the feedback signal. Compared with the prior art, the method has the advantages that the angle of the transmitting signal and the angle of the feedback signal are calculated, the angle difference between the transmitting signal and the angle difference between the feedback signal are processed, and finally, the phase adjustment factor is calculated according to Cordic (coordinate rotation digital calculation method, coordinate Rotation Digital Computer), or the phase adjustment factor is obtained according to conjugate multiplication of the transmitting signal and the feedback signal, compared with the phase adjustment factor obtained by table lookup, the method only needs to conduct preset processing on the expression of the transmitting signal and the first target signal to obtain the second target signal, and then, the phase alignment of the transmitting signal and the feedback signal can be achieved according to the expression of the second target signal and the expression of the feedback signal. The scheme does not need to obtain the phase adjustment factor through Cordic calculation or table lookup, so that the scheme occupies less logic resources of hardware, the area of a corresponding chip is not increased, and the phase alignment of a transmitting signal and a feedback signal can be ensured to be simpler, thereby solving the problem that the prior art occupies more logic resources of hardware when the transmitting signal and the feedback signal are subjected to phase alignment.
2) In the phase alignment device, the conjugation processing unit is used for carrying out conjugation processing on the expression of the feedback signal to obtain the expression of the first target signal; the predetermined processing unit is used for carrying out predetermined processing on the expression of the emission signal and the expression of the first target signal to obtain an expression of a second target signal; the phase alignment unit is used for aligning the phases of the transmitting signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal. Compared with the prior art, the method has the advantages that the angle of the transmitting signal and the angle of the feedback signal are calculated, the angle difference between the transmitting signal and the angle difference between the feedback signal are processed, and finally, the phase adjustment factor is calculated according to Cordic (coordinate rotation digital calculation method, coordinate Rotation Digital Computer), or the phase adjustment factor is obtained according to conjugate multiplication of the transmitting signal and the feedback signal, compared with the phase adjustment factor obtained by table lookup, the method only needs to conduct preset processing on the expression of the transmitting signal and the first target signal to obtain the second target signal, and then, the phase alignment of the transmitting signal and the feedback signal can be achieved according to the expression of the second target signal and the expression of the feedback signal. The scheme does not need to obtain the phase adjustment factor through Cordic calculation or table lookup, so that the scheme occupies less logic resources of hardware, the area of a corresponding chip is not increased, and the phase alignment of a transmitting signal and a feedback signal can be ensured to be simpler, thereby solving the problem that the prior art occupies more logic resources of hardware when the transmitting signal and the feedback signal are subjected to phase alignment.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (7)
1. A phase alignment method, wherein the phase alignment method is applied in a transmitter, the phase alignment method comprising:
performing conjugate processing on the expression of the feedback signal to obtain an expression of a first target signal, wherein the feedback signal is a feedback measurement signal of the transmitting signal;
performing preset processing on the expression of the transmitting signal and the expression of the first target signal to obtain an expression of a second target signal, wherein the preset processing at least comprises denoising processing;
aligning phases of the transmission signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal;
performing predetermined processing on the expression of the transmission signal and the expression of the first target signal to obtain an expression of a second target signal, including:
By usingAnd->Calculated->Wherein X is the transmitting signal, A is the amplitude of the transmitting signal, phi x For the phase of the transmitted signal, Y 2 For the first target signal, B is the amplitude of the first target signal, -phi y A phase of the first target signal;
for a pair ofDenoising processing is carried out, and an expression of the second target signal is obtained;
for a pair ofDenoising to obtain an expression of the second target signal, including:
for a pair ofPerforming shift processing to obtain multiple +.>Wherein E is i E is shifted;
for a plurality ofPerforming smoothing processing to obtain an expression corresponding to the second target signalWherein C is the amplitude of the second target signal, phi x -φ y A phase of the second target signal;
for a pair ofPerforming shift processing to obtain multiple +.>Comprising the following steps:
determining the number of bits of the target adjustment amplitude, and calculating the number of bits and the number of bits of the target adjustment amplitudeObtaining a first numerical value by the difference of the digits of the amplitude values;
will beThe respective digits of the amplitude of (a) are moved forward until the number of movements reaches said first value, wherein +.>Every time the number of bits of the amplitude of (a) is shifted, the bit is shifted forward, and the bit is shifted by one bit>When the number of bits of the amplitude of (a) is shifted one bit forward, a corresponding one is obtained >
2. The phase alignment method of claim 1, wherein aligning the phase of the transmit signal with the feedback signal based on the expression of the second target signal and the expression of the feedback signal comprises:
calculation ofAnd->Is calculated as the product of +.>Wherein (1)>For the second target signal, C is the amplitude of the second target signal, phi x -φ y For the phase of the second target signal, Y 1 For the feedback signal phi y And B is the amplitude of the feedback signal respectively for the phase of the feedback signal.
3. The phase alignment method of claim 2, further comprising, after aligning phases of the transmit signal and the feedback signal based on the second target signal and the feedback signal:
y is set to aligned ＝B·C·e jφx And x=a.e jφx Performing power alignment, wherein X is the transmitting signal, A is the amplitude of the transmitting signal, phi x Is the phase of the transmitted signal.
4. A phase alignment method according to any of claims 1 to 3, wherein before performing the conjugation process on the feedback signal to obtain the first target signal, the phase alignment method further comprises:
And performing time delay alignment on the transmitting signal and the feedback signal.
5. A phase alignment apparatus, comprising:
the conjugation processing unit is used for carrying out conjugation processing on the expression of the feedback signal to obtain the expression of the first target signal, wherein the feedback signal is a feedback measurement signal of the transmitting signal;
a predetermined processing unit, configured to perform predetermined processing on the expression of the transmission signal and the expression of the first target signal, to obtain an expression of a second target signal, where the predetermined processing includes at least denoising processing;
a phase alignment unit for aligning phases of the transmission signal and the feedback signal according to the expression of the second target signal and the expression of the feedback signal;
the predetermined processing unit comprises a second calculation module and a denoising processing module, wherein the second calculation module is used for adoptingAnd->Calculated->Wherein X is the transmitting signal, A is the amplitude of the transmitting signal, phi x For the phase of the transmitted signal, Y 2 For the first target signal, B is the amplitude of the first target signal, -phi y A phase of the first target signal; the denoising processing module is used for performing +. >Denoising processing is carried out, and an expression of the second target signal is obtained;
the denoising processing module comprises a shift processing sub-module and a smoothing processing sub-module, wherein the shift processing sub-module is used for performing a smoothing processing onPerforming shift processing to obtain multiple +.>Wherein E is i E is shifted; the smoothing processing submodule is used for carrying out the treatment on a plurality of +.>Performing smoothing processing to obtain expression corresponding to the second target signal>Wherein C is the amplitude of the second target signal, phi x -φ y A phase of the second target signal;
the shift processing submodule comprises a determination submodule and a shift submodule, wherein the determination submodule is used for determining the bit number of the target adjustment amplitude and calculating the bit number and the bit number of the target adjustment amplitudeObtaining a first numerical value by the difference of the digits of the amplitude values; the shift submodule is used for making +.>The respective digits of the amplitude of (a) are moved forward until the number of movements reaches said first value, wherein +.>Every time the number of bits of the amplitude of (a) is shifted, the bit is shifted forward, and the bit is shifted by one bit>When each digit of the amplitude of (a) is moved forward by one digit, a corresponding one is obtained
6. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein the program performs the phase alignment method of any one of claims 1 to 4.
7. A processor for running a program, wherein the program when run performs the phase alignment method of any of claims 1 to 4.
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