CN111327560B - Phase compensation method and device, signal processing device and CPE system - Google Patents
Phase compensation method and device, signal processing device and CPE system Download PDFInfo
- Publication number
- CN111327560B CN111327560B CN202010245277.6A CN202010245277A CN111327560B CN 111327560 B CN111327560 B CN 111327560B CN 202010245277 A CN202010245277 A CN 202010245277A CN 111327560 B CN111327560 B CN 111327560B
- Authority
- CN
- China
- Prior art keywords
- phase compensation
- antenna array
- antenna
- compensation value
- phase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
Abstract
The present disclosure provides a phase compensation method for an antenna array, where the antenna array includes a plurality of antenna elements arranged side by side, and the method includes: acquiring digital signals corresponding to each antenna array element; and performing phase compensation on the digital signals corresponding to the antenna array elements by using a preset self-adaptive phase-shifting algorithm to control the phase difference between the antenna array elements and further control the directional diagram of the antenna array. The disclosure also provides a phase compensation device, a signal processing device and a CPE system for the antenna array.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a phase compensation method and apparatus for an antenna array, a signal processing apparatus, and a CPE system.
Background
A CPE (Customer Premise Equipment) is a mobile signal access device that receives 4G or 5G mobile signals and forwards the signals using WIFI (wireless fidelity), and in order to meet the coverage requirement of a base station, an array mode is generally used for a CPE antenna to increase gain. Without the scanning function, the antenna aperture needs to be aligned with the direction of the base station during actual installation, which limits the application of the CPE.
Moreover, the conventional antenna array of the CPE generally implements phase compensation among different array elements through a physical phase shifter, and in the physical phase shifter, when a digital phase shifter such as a switch line type is adopted, only a fixed phase difference can be compensated, continuous scanning cannot be performed, and when a continuous phase shifter such as an electrically-controlled liquid crystal is adopted, a great loss (high insertion loss) can be introduced, which affects the design of the antenna array of the CPE.
Disclosure of Invention
The embodiments of the present disclosure are directed to at least one of the technical problems in the prior art, and provide a phase compensation method and apparatus, a signal processing apparatus, and a CPE system.
In a first aspect, an embodiment of the present disclosure provides a phase compensation method for an antenna array, where the antenna array includes multiple antenna elements arranged side by side, and the phase compensation method includes
Acquiring digital signals corresponding to each antenna array element;
and performing phase compensation on the digital signals corresponding to the antenna array elements by using a preset self-adaptive phase shifting algorithm so as to control the phase difference between the antenna array elements.
In some embodiments, the performing phase compensation on the digital signal corresponding to each antenna element by using a preset adaptive phase shift algorithm includes:
determining an optimal phase compensation value from a preset phase compensation value range;
aiming at each antenna array element, determining a phase compensation value corresponding to the antenna array element according to a preset compensation coefficient corresponding to the antenna array element and the optimal phase compensation value;
and according to the digital signals corresponding to the array elements and the corresponding phase compensation values, performing phase compensation on the digital signals corresponding to the array elements by using a preset phase compensation formula.
In some embodiments, the preset phase compensation value range comprises a preset plurality of candidate phase compensation values; the determining an optimal phase compensation value from a preset phase compensation value range includes:
for each candidate phase compensation value, based on a preset evaluation formula, respectively performing phase compensation on the digital signals corresponding to each antenna array element by using the candidate phase compensation value to obtain compensation signals corresponding to each antenna array element;
superposing all compensation signals obtained based on the candidate phase compensation value to obtain superposed signals corresponding to the candidate phase compensation value;
and determining the candidate phase compensation value corresponding to the superposed signal with the maximum signal intensity as the optimal phase compensation value.
In some embodiments, the predetermined evaluation formula is cos (α) n )*cos(N n β m )＝1/2[cos(α n -N n β m )+cos(α n +N n β m )]；
Wherein cos (. Alpha.) is n ) Representing the digital signal, alpha, corresponding to the nth antenna element n ＝ωt+φ n And omega is the angular frequency, phi, of the digital signal corresponding to each antenna element n The phase of the digital signal corresponding to the nth antenna element, t is an independent variable, N n Representing a preset compensation coefficient, N, corresponding to the nth antenna element n Is a natural number, beta m Representing the mth candidate phase compensation value, wherein m and n are positive integers;
compensating value beta for mth candidate phase m The compensation signal corresponding to the nth antenna element is 1/2[ cos (alpha ]) n -N n β m )]Or 1/2cos (alpha) n +N n β m )]。
In some embodiments, the predetermined phase compensation formula is cos (α) n -N n Beta) or cos (. Alpha.) n +N n β)；
Wherein alpha is n ＝ωt+φ n Omega is the angular frequency, phi, of the digital signal corresponding to each antenna element n The phase of the digital signal corresponding to the nth antenna element, t is an independent variable, N n Beta represents the phase compensation value corresponding to the nth antenna array element, beta is the optimal phase compensation value, N n Representing a preset compensation coefficient, N, corresponding to the nth antenna element n Is a natural number.
In a second aspect, an embodiment of the present disclosure provides a phase compensation apparatus for an antenna array, where the antenna array includes a plurality of antenna elements arranged side by side, the apparatus includes:
the acquisition module is used for acquiring digital signals corresponding to the antenna array elements;
and the phase shifting module is used for performing phase compensation on the digital signals corresponding to the antenna array elements by utilizing a preset self-adaptive phase shifting algorithm so as to control the phase difference between the antenna array elements.
In some embodiments, the phase shift module is specifically configured to determine an optimal phase compensation value from a preset range of phase compensation values; aiming at each antenna array element, determining a phase compensation value corresponding to the antenna array element according to a preset compensation coefficient corresponding to the antenna array element and the optimal phase compensation value; and according to the digital signals corresponding to the array elements and the corresponding phase compensation values, performing phase compensation on the digital signals corresponding to the array elements by using a preset phase compensation formula.
In some embodiments, the phase shift module is specifically configured to, for each candidate phase compensation value, based on a preset evaluation formula, perform phase compensation on the digital signal corresponding to each antenna array element by using the candidate phase compensation value, to obtain a compensation signal corresponding to each antenna array element; superposing all compensation signals obtained based on the candidate phase compensation value to obtain superposed signals corresponding to the candidate phase compensation value; and determining the candidate phase compensation value corresponding to the superposed signal with the maximum signal intensity as the optimal phase compensation value.
In a third aspect, an embodiment of the present disclosure provides a signal processing apparatus, including:
the antenna array comprises a plurality of antenna array elements arranged side by side and is used for receiving an initial signal;
the signal processing unit is arranged corresponding to each antenna array element and is used for carrying out signal processing on the initial signal of the corresponding antenna array element to obtain a corresponding digital signal;
and the processor is connected with the signal processing unit corresponding to each antenna array element and comprises the phase compensation device provided by any one of the above embodiments.
In some embodiments, the signal processing unit includes:
the low noise amplifier is connected with the corresponding antenna array element and is used for amplifying the initial signal of the corresponding antenna array element;
the mixer is connected with the corresponding low-noise amplifier and the local oscillator and is used for carrying out down-conversion processing on the signal processed by the corresponding low-noise amplifier to obtain a corresponding intermediate-frequency signal;
the filter is connected with the corresponding mixer and used for filtering the intermediate frequency signal processed by the corresponding mixer;
and the analog-to-digital converter is connected with the corresponding filter and used for performing analog-to-digital conversion on the signal processed by the corresponding filter to obtain the corresponding digital signal.
In a fourth aspect, an embodiment of the present disclosure provides a CPE system, which includes the signal processing apparatus provided in any one of the above embodiments.
Drawings
Fig. 1 is a flowchart of a phase compensation method for an antenna array according to an embodiment of the present disclosure;
FIG. 2 is a flow chart of one embodiment of step 12 of FIG. 1;
FIG. 3 is a flowchart of one embodiment of step 121 of FIG. 2;
fig. 4 is a block diagram of a phase compensation apparatus for an antenna array according to an embodiment of the present disclosure;
fig. 5 is a block diagram of a signal processing apparatus according to an embodiment of the disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the embodiments of the present disclosure, the following will clearly and completely describe the technical solutions of the phase compensation method and apparatus, the signal processing apparatus, and the CPE system provided by the embodiments of the present disclosure with reference to the drawings of the embodiments of the present disclosure.
Example embodiments will be described more fully hereinafter with reference to the accompanying drawings, but which may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements/structures, these elements/structures should not be limited by these terms. These terms are only used to distinguish one element/structure from another element/structure.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
Fig. 1 is a flowchart of a phase compensation method for an antenna array provided in an embodiment of the present disclosure, where the antenna array includes a plurality of antenna elements arranged side by side, and as shown in fig. 1, the phase compensation method includes:
and 11, acquiring digital signals corresponding to the antenna array elements.
In the embodiment of the present disclosure, after the antenna array element receives the initial signal, for example, the initial signal is a signal from a base station, and is processed by a signal processing unit disposed corresponding to the antenna array element, so as to obtain a corresponding digital signal. In step 11, for each antenna element, the digital signal corresponding to the antenna element is obtained from the signal processing unit corresponding to the antenna element. Thereby obtaining the digital signals corresponding to each antenna array element.
And step 12, performing phase compensation on the digital signals corresponding to the antenna array elements by using a preset self-adaptive phase shifting algorithm to control the phase difference between the antenna array elements.
In the embodiment of the present disclosure, after the digital signals corresponding to each antenna array element are obtained, a preset adaptive phase shift algorithm is used to perform phase shift compensation on the phase of the digital signal corresponding to each antenna array element, so as to control the phase difference between the signals received by the antenna array elements, and further control the directional diagram of the antenna array.
In the phase compensation method provided by the embodiment of the present disclosure, after the digital signals corresponding to each antenna array element are obtained, the digital signals corresponding to each antenna array element are subjected to phase compensation by using a preset adaptive phase shift algorithm, so as to compensate for a phase difference between the antenna array elements. The phase shift of each antenna array element is realized through a preset self-adaptive phase shift algorithm, so that the phase difference between signals received by the antenna array elements is compensated, the traditional physical phase shifter is not needed, the scanning discontinuity, the high insertion loss and the like caused by the design of the traditional physical phase shifter are effectively avoided, the influence of the scanning discontinuity and the high insertion loss on the CPE antenna design is effectively avoided, and the usability of the CPE equipment is increased.
In this disclosed embodiment, a plurality of antenna array elements that set up side by side equidistant setting, the distance between every two adjacent antenna array elements is fixed and the same promptly, and a plurality of antenna array elements that set up side by side include reference array element and at least one other array element. It will be appreciated that the other elements are antenna elements other than the reference element.
In this disclosure, one antenna element located at the outermost edge (leftmost side or rightmost side) of the multiple antenna elements arranged side by side may be selected as a reference element, an antenna element located at the middle position of the multiple antenna elements arranged side by side may also be selected as a reference element, and an antenna element located at a specified position may also be selected as a reference element, which is not limited in this disclosure.
Under the condition that an antenna array element at the middle position in a plurality of antenna array elements arranged side by side is selected as a reference array element, when the number of the antenna array elements is odd, only one antenna array element at the middle position is selected, and the antenna array element at the middle position is the reference array element; when the number of the antenna array elements is even, two antenna array elements are arranged in the middle, and one of the two antenna array elements is selected as a reference array element.
Fig. 2 is a flowchart of one specific implementation of step 12 in fig. 1, and as shown in fig. 2, step 12 includes steps 121 to 123 in some embodiments.
And step 121, determining an optimal phase compensation value from a preset phase compensation value range.
In some embodiments, the preset phase compensation value range includes a plurality of candidate phase compensation values. That is, in step 121, one candidate phase compensation value is selected from the plurality of candidate phase compensation values as the optimal phase compensation value. The preset phase compensation value range may be determined according to the maximum scanning angle that the antenna array can meet and the required scanning accuracy, the preset phase compensation value range may be a parameter preset when the antenna array leaves a factory, and each candidate phase compensation value in the preset phase compensation value range is a constant.
Fig. 3 is a flowchart of a specific implementation manner of step 121 in fig. 2, and as shown in fig. 3, in some embodiments, step 121 includes steps 1211 to 1213.
And 1211, performing phase compensation on the digital signals corresponding to the antenna array elements by using the candidate phase compensation values based on a preset evaluation formula for each candidate phase compensation value to obtain compensation signals corresponding to the antenna array elements.
In some embodiments, the preset evaluation formula is based on an integration and difference formula of a trigonometric function, wherein the integration and difference formula of the trigonometric function comprises:
formula (1): sin α cos β =1/2[ alpha ], [ alpha + β) + sin (α - β ]
Formula (2): cos α sin β =1/2[ alpha ], [ alpha + β ] -sin (α - β) ]
Formula (3): cos α cos β =1/2[ cos (α + β) + cos (α - β) ]
Formula (4): sin α sin β =1/2[ 2 ], [ cos (α + β) -cos (α - β) ]
In some embodimentsIn the method, the digital signal corresponding to the antenna element is a cosine signal, the preset evaluation formula is based on the formula (3), and the preset evaluation formula is cos (alpha) n )*cos(N n β m )＝1/2[cos(α n -N n β m )+cos(α n +N n β m )]。
Wherein cos (. Alpha.) is n ) Representing the digital signal, alpha, corresponding to the nth antenna element n ＝ωt+φ n And omega is the angular frequency, phi, of the digital signal corresponding to each antenna element n Is the phase of the digital signal corresponding to the nth antenna element, t is an independent variable, N n Representing a predetermined compensation factor, N, for the nth antenna element n Is a natural number, beta m And m and n are positive integers. Where ω =2 π f, f is the signal frequency, and f is the same for all elements, i.e., ω is the same.
In some embodiments, the compensation coefficient corresponding to the reference array element is 0, and the compensation coefficients corresponding to the other array elements are determined according to the distances between the other array elements and the reference array element. For example, the interval between two adjacent antenna array elements is a fixed interval, and for each other array element, if the interval between the other array element and the reference array element is 1 fixed interval, the compensation coefficient corresponding to the other array element is set to 1, if the interval between the other array element and the reference array element is 2 fixed intervals, the compensation coefficient corresponding to the other array element is set to 2, if the interval between the other array element and the reference array element is 3 fixed intervals, the compensation coefficient corresponding to the other array element is set to 3, and so on.
In some embodiments, in step 1211, first, for each candidate phase compensation value, the compensation coefficient corresponding to each antenna element, and the digital signal corresponding to each antenna element are substituted into the above formula: cos (. Alpha.) of n )*cos(N n β m )＝1/2[cos(α n -N n β m )+cos(α n +N n β m )]And obtaining compensation data corresponding to each antenna array element based on the candidate phase compensation value: 1/2[ cos (alpha) ] n -N n β m )+cos(α n +N n β m )]。
And then, carrying out data processing on the compensation data corresponding to each antenna array element based on the candidate phase compensation value to obtain a compensation signal corresponding to each antenna array element based on the candidate phase compensation value. Wherein for the m-th candidate phase compensation value beta m The compensation signal corresponding to the nth antenna element is 1/2[ cos (alpha ]) n -N n β m )]Or 1/2cos (alpha) n +N n β m )]。
For example, suppose that a plurality of antenna elements arranged side by side include element 1, element 2, element 3 and element 4, where element 1 is a reference element and the digital signal corresponding to element 1 is cos (α) 1 ) The compensation coefficient corresponding to the array element 1 is 0, and the digital signal corresponding to the array element 2 is cos (alpha) 2 ) The compensation coefficient corresponding to the array element 2 is 1, and the digital signal corresponding to the array element 3 is cos (alpha) 3 ) The compensation coefficient corresponding to the array element 3 is 2, and the digital signal corresponding to the array element 4 is cos (alpha) 4 ) The compensation coefficient corresponding to the array element 4 is 3, and it is assumed that the candidate phase compensation values are β respectively 1 、β 2 And beta 3 。
In step 1211, the compensation value β is compensated for the candidate phase 1 The compensation data corresponding to the array element 1 is calculated by the formula as cos (alpha) 1 )*cos(0*β 1 )＝1/2[cos(α 1 -0*β 1 )+cos(α 1 +0*β 1 )]The compensation data corresponding to array element 2 is cos (alpha) 2 )*cos(1*β 1 )＝1/2[cos(α 2 -1*β 1 )+cos(α 2 +1*β 1 )]The compensation data corresponding to the array element 3 is cos (alpha) 3 )*cos(2*β 1 )＝1/2[cos(α 3 -2*β 1 )+cos(α 3 +2*β 1 )]The compensation data corresponding to the array element 4 is cos (alpha) 4 )*cos(3*β 1 )＝1/2[cos(α 4 -3*β 1 )+cos(α 4 +3*β 1 )]。
Compensating value beta for candidate phase 1 Respectively processing the compensation data corresponding to each array element to obtain a cos (alpha) compensation signal corresponding to the array element 1 1 ) The compensation signal corresponding to the array element 2 is 1/2cos(α 2 -1*β 1 ) Or 1/2cos (. Alpha.) 2 +1*β 1 ) The compensation signal corresponding to the array element 3 is 1/2cos (alpha) 3 -2*β 1 ) Or 1/2cos (. Alpha.) 3 +2*β 1 ) The compensation signal corresponding to the array element 4 is 1/2cos (alpha) 4 -3*β 1 ) Or 1/2cos (. Alpha.) 4 +3*β 1 )。
Compensating value beta for candidate phase 2 、β 3 Can be seen in the foregoing for the candidate phase compensation value β 1 The calculation of (2) is not described herein.
In some embodiments, when the reference array element is located at the most peripheral position of the antenna array, the compensation signal corresponding to the digital signal cos (α) of each of the other array elements is 1/2cos (α -N × β), or the compensation signal corresponding to each of the other array elements is 1/2cos (α + N × β). Wherein, N is the compensation coefficient corresponding to other array elements, and beta is the candidate phase compensation value.
In some embodiments, when the reference array element is located at the middle position of the antenna array, the compensation signals corresponding to other array elements located at the left side of the reference array element are 1/2cos (α -N × β), and the compensation signals corresponding to other array elements located at the right side of the reference array element are 1/2cos (α + N × β); or, when the reference array element is located in the middle of the antenna array, the compensation signals corresponding to the other array elements located on the left side of the reference array element are 1/2cos (α + N × β), and the compensation signals corresponding to the other array elements located on the right side of the reference array element are 1/2cos (α -N × β).
And 1212, superposing the compensation signals obtained based on the candidate phase compensation value to obtain a superposed signal corresponding to the candidate phase compensation value.
For example, for the candidate phase compensation value β 1 The compensation signals corresponding to the array elements (array element 1, array element 2, array element 3, and array element 4) obtained through the processing in step 1211 are cos (α) 1 )、1/2cos(α 2 -1*β 1 )、1/2cos(α 3 -2*β 1 )、1/2cos(α 4 -3*β 1 ). Then in step 1212 the compensation value beta is compensated for the candidate phase 1 The candidate phase compensation value beta 1 Corresponding superimposed signal A1= cos (α) 1 )+1/2cos(α 2 -1*β 1 )+1/2cos(α 3 -2*β 1 )+1/2cos(α 4 -3*β 1 ). And so on, the candidate phase compensation value beta 2 Corresponding superimposed signal A2= cos (α) 1 )+1/2cos(α 2 -1*β 2 )+1/2cos(α 3 -2*β 2 )+1/2cos(α 4 -3*β 2 ) Candidate phase compensation value beta 3 Corresponding superimposed signal A3= cos (α) 1 )+1/2cos(α 2 -1*β 3 )+1/2cos(α 3 -2*β 3 )+1/2cos(α 4 -3*β 3 )。
For example, if the signal intensity of the superimposed signal A1 is the maximum among the superimposed signals A1, A2, and A3, the candidate phase compensation value β corresponding to the superimposed signal A1 is set to the maximum value 1 As an optimal phase compensation value.
And step 122, determining a phase compensation value corresponding to each antenna array element according to a preset compensation coefficient corresponding to the antenna array element and the optimal phase compensation value.
And aiming at each antenna array element, the phase compensation value corresponding to the antenna array element is the product of the preset compensation coefficient corresponding to the antenna array element and the optimal phase compensation value. In the embodiment of the present disclosure, in the multiple antenna elements, the compensation coefficient of the reference element is 0, and the compensation coefficients of the other elements are determined according to the distance between the reference element and the compensation coefficient of the reference element.
And step 123, performing phase compensation on the digital signals corresponding to the array elements by using a preset phase compensation formula according to the digital signals corresponding to the array elements and the corresponding phase compensation values.
Wherein the preset phase compensation formula is cos (alpha) n -N n Beta) or cos (. Alpha.) n +N n β); wherein alpha is n ＝ω n t+φ n ，ω n For the angular frequency, phi, of the digital signal corresponding to the nth antenna element n The phase of the digital signal corresponding to the nth antenna elementT is an independent variable, N n Beta represents the phase compensation value corresponding to the nth antenna array element, beta is the optimal phase compensation value, and N n Representing a preset compensation coefficient, N, corresponding to the nth antenna element n Is a natural number.
As can be appreciated, cos (. Alpha.) is n -N n Beta) represents a pair signal cos (. Alpha.) n ) Lead compensation of the phase of (a), cos (a) n +N n Beta) represents a signal cos (. Alpha.) of the pair n ) Lag compensation of the phase of, N n β can also be understood as the amount of phase shift, and the phase of the digital signal corresponding to an element is compensated for either a lead or lag depending on the scan direction of the antenna. For example, when the leftmost array element is selected as the reference array element, the pattern of the default antenna array is in the normal direction when the phase compensation is not performed, if left scanning is required, the advance compensation needs to be performed on other array elements, and if right scanning is required, the lag compensation needs to be performed on other array elements. It should be noted that the compensation signal also needs to be determined according to the scanning direction of the antenna.
In some embodiments, after the optimal phase compensation value is determined, the phase compensation value of each array element is determined according to the compensation coefficient and the optimal phase compensation value of each array element, and the phase of the digital signal of each array element is compensated according to the phase compensation value of each array element, so that the phase difference between the array elements can be effectively compensated, and the directional diagram of the antenna array can be effectively controlled.
Fig. 4 is a block diagram of a phase compensation apparatus for an antenna array according to an embodiment of the present disclosure, and as shown in fig. 4, the phase compensation apparatus includes: an acquisition module 21 and a phase shift module 22.
The obtaining module 21 is configured to obtain a digital signal corresponding to each antenna array element; the phase shift module 22 is configured to perform phase compensation on the digital signals corresponding to each antenna element by using a preset adaptive phase shift algorithm, so as to control a phase difference between the antenna elements.
In some embodiments, the phase shift module 22 is specifically configured to determine an optimal phase compensation value from a preset range of phase compensation values; aiming at each antenna array element, determining a phase compensation value corresponding to the antenna array element according to a preset compensation coefficient corresponding to the antenna array element and the optimal phase compensation value; and performing phase compensation on the digital signals corresponding to the array elements by using a preset phase compensation formula according to the digital signals corresponding to the array elements and the corresponding phase compensation values.
In some embodiments, the phase shift module 22 is specifically configured to, for each candidate phase compensation value, perform phase compensation on the digital signal corresponding to each antenna array element by using the candidate phase compensation value based on a preset evaluation formula, so as to obtain a compensation signal corresponding to each antenna array element; superposing all compensation signals obtained based on the candidate phase compensation value to obtain superposed signals corresponding to the candidate phase compensation value; and determining the candidate phase compensation value corresponding to the superposed signal with the maximum signal intensity as the optimal phase compensation value.
In addition, the phase compensation device provided in the embodiments of the present disclosure is used to implement the phase compensation method described above, and for specific relevant description, reference may be made to the phase compensation method described in the foregoing embodiments, and details are not repeated here.
Fig. 5 is a block diagram of a signal processing apparatus according to an embodiment of the disclosure, and as shown in fig. 5, the signal processing apparatus includes: an antenna array, a signal processing unit 31 and a processor 32.
The antenna array includes a plurality of antenna elements (ANT) 33 arranged side by side, and the antenna elements 33 are used for receiving an initial signal.
The signal processing unit 31 is disposed corresponding to each antenna element 33, and the signal processing unit 31 is configured to perform signal processing on the initial signal of the corresponding antenna element 33 to obtain a corresponding digital signal.
The processor 32 is connected to the signal processing unit 31 corresponding to each antenna element 33, the processor 32 includes a phase compensation device, the phase compensation device includes the phase compensation device provided in any of the above embodiments, and for a specific description of the phase compensation device, reference may be made to the description of the phase compensation device in the foregoing embodiments, which is not described herein again.
In some embodiments, as shown in fig. 5, the signal processing unit 31 includes a Low Noise Amplifier (LNA) 311, a Mixer (Mixer) 312, a filter 313, and an analog-to-digital converter (ADC) 314.
The low noise amplifier 311 is connected to the corresponding antenna element 33, and the low noise amplifier 311 is configured to amplify an initial signal of the corresponding antenna element 33. The mixer 312 is connected to the corresponding low noise amplifier 311 and the local oscillator LO, and the mixer 312 is configured to perform down-conversion processing on the signal processed by the corresponding low noise amplifier 311 to obtain a corresponding intermediate frequency signal. The filter 313 is connected to the corresponding mixer 312, and the filter 313 is configured to perform filtering processing on the intermediate frequency signal processed by the corresponding mixer 312. The analog-to-digital converter 314 is connected to the corresponding filter 313, and the analog-to-digital converter 314 is configured to perform analog-to-digital conversion on the signal processed by the corresponding filter 313 to obtain a corresponding digital signal. The processor 32 is coupled to each analog-to-digital converter 314. The filter 313 may be a Low Pass Filter (LPF), a Band Pass Filter (BPF), or a High Pass Filter (HPF), and may be specifically selected according to actual needs.
In some embodiments, the processor 32 is a baseband processing chip (BB), which may employ a DSP (digital signal processor) based on an FPGA (Field Programmable Gate Array).
In the embodiment of the present disclosure, the processor 32 is further configured to decode the compensated digital signals of each array element after performing phase compensation on the digital signals of each array element by using an adaptive phase shift algorithm, so as to obtain the required information.
In addition, an embodiment of the present disclosure further provides a CPE system, which includes a signal processing apparatus, where the signal processing apparatus adopts the signal processing apparatus provided in any of the above embodiments, and specific descriptions about the signal processing apparatus may refer to the descriptions of the foregoing embodiments, and are not repeated herein.
It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these changes and modifications are to be considered within the scope of the disclosure.
Claims (6)
1. A method for phase compensation of an antenna array, wherein the antenna array comprises a plurality of antenna elements arranged side by side, the method comprising:
acquiring digital signals corresponding to each antenna array element;
performing phase compensation on the digital signals corresponding to the antenna array elements by using a preset self-adaptive phase shifting algorithm to control the phase difference between the antenna array elements;
the phase compensation is performed on the digital signals corresponding to the antenna array elements by using a preset adaptive phase shift algorithm, and the phase compensation method comprises the following steps:
determining an optimal phase compensation value from a preset phase compensation value range;
aiming at each antenna array element, determining a phase compensation value corresponding to the antenna array element according to a preset compensation coefficient corresponding to the antenna array element and the optimal phase compensation value;
according to the digital signals corresponding to the array elements and the corresponding phase compensation values, phase compensation is carried out on the digital signals corresponding to the array elements by utilizing a preset phase compensation formula;
the preset phase compensation value range comprises a plurality of preset candidate phase compensation values; the determining an optimal phase compensation value from a preset phase compensation value range includes:
for each candidate phase compensation value, based on a preset evaluation formula, respectively performing phase compensation on the digital signals corresponding to each antenna array element by using the candidate phase compensation value to obtain compensation signals corresponding to each antenna array element;
superposing all compensation signals obtained based on the candidate phase compensation value to obtain superposed signals corresponding to the candidate phase compensation value;
determining the candidate phase compensation value corresponding to the superposed signal with the maximum signal intensity as the optimal phase compensation value;
the predetermined phaseThe bit compensation formula is cos (alpha) n -N n Beta) or cos (. Alpha.) n +N n β)；
Wherein, the first and the second end of the pipe are connected with each other,
omega is the angular frequency of the digital signal corresponding to each antenna element,
is the phase of the digital signal corresponding to the nth antenna element, t is an independent variable, N n Beta represents the phase compensation value corresponding to the nth antenna array element, beta is the optimal phase compensation value, and N n Represents the compensation coefficient corresponding to the N-th antenna element which is preset, N n Is a natural number.
2. The phase compensation method of claim 1, wherein the predetermined evaluation formula is cos (α) n )*cos(N n β m )＝1/2[cos(α n -N n β m )+cos(α n +N n β m )]；
Wherein cos (. Alpha.) is n ) Representing the digital signal corresponding to the nth antenna element,
omega is the angular frequency of the digital signal corresponding to each antenna element,
the phase of the digital signal corresponding to the nth antenna element, t is an independent variable, N n Represents the compensation coefficient corresponding to the N-th antenna element which is preset, N n Is a natural number, beta m Representing the mth candidate phase compensation value, wherein m and n are positive integers;
compensating value beta for mth candidate phase m The compensation signal corresponding to the nth antenna element is 1/2[ cos (alpha ]) n -N n β m )]Or 1/2[ cos (. Alpha.) ] n +N n β m )]。
3. A phase compensation apparatus for an antenna array, wherein the antenna array comprises a plurality of antenna elements arranged side by side, the apparatus comprising:
the acquisition module is used for acquiring digital signals corresponding to the antenna array elements;
the phase shifting module is used for performing phase compensation on the digital signals corresponding to the antenna array elements by utilizing a preset self-adaptive phase shifting algorithm so as to control the phase difference between the antenna array elements;
the phase shifting module is specifically used for determining an optimal phase compensation value from a preset phase compensation value range; aiming at each antenna array element, determining a phase compensation value corresponding to the antenna array element according to a preset compensation coefficient corresponding to the antenna array element and the optimal phase compensation value; according to the digital signals corresponding to the array elements and the corresponding phase compensation values, phase compensation is carried out on the digital signals corresponding to the array elements by utilizing a preset phase compensation formula;
the phase shifting module is specifically used for carrying out phase compensation on the digital signals corresponding to the antenna array elements by using the candidate phase compensation values based on a preset evaluation formula aiming at each candidate phase compensation value to obtain compensation signals corresponding to the antenna array elements; superposing each compensation signal obtained based on the candidate phase compensation value to obtain a superposed signal corresponding to the candidate phase compensation value; determining the candidate phase compensation value corresponding to the superposed signal with the maximum signal intensity as the optimal phase compensation value;
the preset phase compensation formula is cos (alpha) n -N n Beta) or cos (. Alpha.) n +N n β)；
Wherein, the first and the second end of the pipe are connected with each other,
omega is the angular frequency of the digital signal corresponding to each antenna element,
is the nth antenna arrayPhase of digital signal corresponding to element, t is independent variable, N n Beta represents the phase compensation value corresponding to the nth antenna array element, beta is the optimal phase compensation value, and N n Representing a preset compensation coefficient, N, corresponding to the nth antenna element n Is a natural number.
4. A signal processing apparatus, characterized by comprising:
the antenna array comprises a plurality of antenna elements arranged side by side and is used for receiving an initial signal;
the signal processing unit is arranged corresponding to each antenna array element and is used for carrying out signal processing on the initial signal of the corresponding antenna array element to obtain a corresponding digital signal;
a processor, connected to the signal processing unit corresponding to each antenna element, comprising the phase compensation device of claim 3.
5. The signal processing apparatus of claim 4, wherein the signal processing unit comprises:
the low noise amplifier is connected with the corresponding antenna array element and is used for amplifying the initial signal of the corresponding antenna array element;
the mixer is connected with the corresponding low-noise amplifier and the local oscillator and is used for carrying out down-conversion processing on the signal processed by the corresponding low-noise amplifier to obtain a corresponding intermediate-frequency signal;
the filter is connected with the corresponding mixer and used for filtering the intermediate frequency signal processed by the corresponding mixer;
and the analog-to-digital converter is connected with the corresponding filter and used for performing analog-to-digital conversion on the signal processed by the corresponding filter to obtain the corresponding digital signal.
6. CPE system characterized in that it comprises a signal processing device according to the previous claim 4 or 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245277.6A CN111327560B (en) | 2020-03-31 | 2020-03-31 | Phase compensation method and device, signal processing device and CPE system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010245277.6A CN111327560B (en) | 2020-03-31 | 2020-03-31 | Phase compensation method and device, signal processing device and CPE system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111327560A CN111327560A (en) | 2020-06-23 |
| CN111327560B true CN111327560B (en) | 2022-11-29 |
Family
ID=71167798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010245277.6A Active CN111327560B (en) | 2020-03-31 | 2020-03-31 | Phase compensation method and device, signal processing device and CPE system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111327560B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112073350B (en) * | 2020-11-02 | 2021-03-02 | 网络通信与安全紫金山实验室 | Phase difference measuring method and system for antenna array and phase compensation method |
| CN112886995B (en) * | 2021-01-19 | 2022-07-19 | 京东方科技集团股份有限公司 | Control device, antenna control method, and receiver |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1291011A (en) * | 1999-08-24 | 2001-04-11 | 三星电子株式会社 | Diversity method of closed ring transmit antenna and base station equipment and movable station equipment |
| CN109541993A (en) * | 2018-10-28 | 2019-03-29 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Phase array antenna beam control device |
| CN110178315A (en) * | 2017-01-24 | 2019-08-27 | 华为技术有限公司 | A kind of antenna correcting method and device |
| CN110740505A (en) * | 2019-10-18 | 2020-01-31 | 深圳市微能信息科技有限公司 | Positioning circuit, positioning system and positioning method based on Bluetooth AOA communication |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017153814A1 (en) * | 2016-03-11 | 2017-09-14 | Telefonaktiebolaget Lm Ericsson (Publ) | Antenna array calibration method and apparatus |
-
2020
- 2020-03-31 CN CN202010245277.6A patent/CN111327560B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1291011A (en) * | 1999-08-24 | 2001-04-11 | 三星电子株式会社 | Diversity method of closed ring transmit antenna and base station equipment and movable station equipment |
| CN110178315A (en) * | 2017-01-24 | 2019-08-27 | 华为技术有限公司 | A kind of antenna correcting method and device |
| CN109541993A (en) * | 2018-10-28 | 2019-03-29 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Phase array antenna beam control device |
| CN110740505A (en) * | 2019-10-18 | 2020-01-31 | 深圳市微能信息科技有限公司 | Positioning circuit, positioning system and positioning method based on Bluetooth AOA communication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111327560A (en) | 2020-06-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111327560B (en) | Phase compensation method and device, signal processing device and CPE system | |
| KR100677296B1 (en) | Diversity receiver | |
| US4947176A (en) | Multiple-beam antenna system | |
| FI98580C (en) | Selective filtration in a cellular phone | |
| US9577689B2 (en) | Apparatus and methods for wide bandwidth analog-to-digital conversion of quadrature receive signals | |
| EP2122385A1 (en) | Phase shifting and combining architecture for phased arrays | |
| CN111771345B (en) | System and method for configurable hybrid self-interference cancellation | |
| US20140321578A1 (en) | Efficient signal processing for receive and transmit dbf arrays | |
| US7327994B2 (en) | Architecture for multiple-antenna systems | |
| CN109075458B (en) | Apparatus and method for beamforming tracking | |
| US20050123067A1 (en) | Apparatus and method for detecting I/Q channel imbalance in direct conversion digital quadrature transmission system | |
| US8063724B2 (en) | Self-matching band-pass filter and related frequency down converter | |
| CN108987948B (en) | Antenna structure composed of multi-port sub-array and base frequency signal processor | |
| CN111983580B (en) | Radar signal frequency dispersion processing method | |
| CN111211826B (en) | Recursive structure beam forming method and device | |
| WO2008056932A1 (en) | Apparatus and method for downconverting rf multi-signals simultaneously by bandpass sampling | |
| US20060165199A1 (en) | Communication device | |
| EP1614237A1 (en) | Apparatus for processing digital if signals capable of detecting jamming signals | |
| KR101161355B1 (en) | Device for receiving digital signals with fading compensation | |
| US20190089054A1 (en) | Techniques and Methods for Adaptive Removal of Analog Phase Errors in Frequency Division Multiplexed Digital Beam-Formers | |
| CN108682965B (en) | Digital domain polarization reconstruction system and method for active antenna | |
| US6229483B1 (en) | Method and device relating to self-calibration of group antenna system having time varying transmission characteristics | |
| US20030091128A1 (en) | Digital demodulator, a telecommunications receiver, and a method of digital demodulation | |
| US11245186B2 (en) | Spatial and bandwidth multiplexing device and method | |
| JP4025236B2 (en) | Array antenna communication device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |