CN117135644A - Peak cancellation processing method, device and computer readable storage medium - Google Patents
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Abstract
The application provides a peak value cancellation processing method, a peak value cancellation processing device and a computer readable storage medium, wherein the peak value cancellation processing method comprises the following steps: normalizing the signal input by the baseband side, and converting the normalized signal from a rectangular coordinate system to a polar coordinate system to obtain the amplitude and the phase corresponding to the signal; when the amplitude of the signal is detected, if the maximum amplitude value occurs in the search window, recording the time delay delta t between the starting time of the search window and the occurrence time of the maximum amplitude value; determining the moment of outputting the impulse response sequence based on the time length of the time delay delta t, and outputting the impulse response sequence at the moment; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth; performing complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold under a polar coordinate system to obtain a cancellation amplitude; and performing inverse coordinate system conversion on the cancellation amplitude and the phase to obtain signals under a rectangular coordinate system.
Description
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a peak cancellation processing method, apparatus, and computer readable storage medium.
Background
With the high-speed development of the 5G network construction requirement, the requirement of the radio frequency transceiver chip applicable to the 5G standard and frequency band is developed explosively. Therefore, the radio frequency transceiver chip with low cost and fine design provides a technical scheme for the construction of the large-scale pico base station, the macro base station and the home base station. The digital front-end processing link represented by the peak cancellation processing technique is one of the core techniques of the radio frequency transceiver chip; the peak value cancellation processing technology is used for nonlinear distortion correction of a power amplifier in a base station, and occupies larger design proportion and area cost in a digital front-end processing link.
However, in the peak cancellation processing implementation scheme provided by the related art, the problem of design simplification is not considered from the aspect of algorithm optimization, so that the complexity of chip design and the area of chip design are increased, and larger design loss is caused.
Disclosure of Invention
In view of this, it is desirable for embodiments of the present application to provide a peak cancellation processing method, apparatus, and computer readable storage medium.
In order to achieve the above object, the technical solution of the embodiment of the present application is as follows:
the embodiment of the application provides a peak cancellation processing method, which comprises the following steps:
normalizing the signal input by the baseband side, and converting the normalized signal from a rectangular coordinate system to a polar coordinate system to obtain the amplitude and the phase corresponding to the signal;
when the amplitude of the signal is detected, if the maximum amplitude value occurs in the search window, recording the time delay delta t between the starting time of the search window and the occurrence time of the maximum amplitude value;
determining the moment of outputting the impulse response sequence based on the time length of the time delay delta t, and outputting the impulse response sequence at the moment; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth;
performing complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold under a polar coordinate system to obtain a cancellation amplitude;
and performing inverse coordinate system conversion on the cancellation amplitude and the phase to obtain signals under a rectangular coordinate system.
Optionally, the method further comprises:
quadrant information corresponding to the signals is obtained and used for obtaining signals under a rectangular coordinate system in the inverse coordinate system conversion process; the quadrant information is the quadrant information before signal normalization.
Optionally, the method further comprises:
the corresponding real form impulse response sequences are preset based on different signal bandwidths.
Wherein the determining the time of outputting the impulse response sequence based on the time length of the delay deltat and outputting the impulse response sequence at the time includes:
beginning to count down at the end time of the search window, wherein the time duration is the time delay delta t;
and outputting the impulse response sequence in a real number form corresponding to the signal bandwidth when the countdown is finished.
The normalizing the signal input by the baseband side comprises the following steps:
signals in the second quadrant, the third quadrant and the fourth quadrant which are input on the baseband side are converted into the first quadrant through angle transformation.
The embodiment of the application also provides a peak value cancellation processing device, which comprises:
the coordinate system conversion module is used for normalizing the signals input by the baseband side, and converting the normalized signals from a rectangular coordinate system to a polar coordinate system to obtain the corresponding amplitude and phase of the signals;
the peak value searching module is used for recording the time delay delta t between the starting time of the searching window and the appearance time of the amplitude maximum value if the amplitude maximum value appears in the searching window when the amplitude of the signal is detected;
the sequence generation module is used for determining the moment of outputting the impulse response sequence based on the time length of the time delay delta t and outputting the impulse response sequence at the moment; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth;
the complex multiplication module is used for carrying out complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold under a polar coordinate system to obtain a cancellation amplitude;
and the anti-coordinate system conversion module is used for carrying out anti-coordinate system conversion on the opposite cancellation amplitude and the phase to obtain signals under a rectangular coordinate system.
The sequence generation module is further used for storing impulse response sequences in corresponding real number forms preset based on different signal bandwidths.
The peak value searching module is further configured to send the time delay Δt to the sequence generating module at the end time of the search window; in a corresponding manner,
the sequence generating module is further configured to start counting down when the time delay Δt is received, where the timing duration is the time delay Δt; and outputting the impulse response sequence in a real number form corresponding to the signal bandwidth when the countdown is finished.
The embodiment of the application also provides a peak value cancellation processing device, which comprises: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is configured to execute the steps of the above method when running the computer program.
The embodiment of the application also provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, implements the steps of the above method.
The peak cancellation processing method, the peak cancellation processing device and the computer readable storage medium provided by the embodiment of the application normalize the signal input by the baseband side, and convert the normalized signal from a rectangular coordinate system to a polar coordinate system to obtain the amplitude and the phase corresponding to the signal; when the amplitude of the signal is detected, if the maximum amplitude value occurs in the search window, recording the time delay delta t between the starting time of the search window and the occurrence time of the maximum amplitude value; determining the moment of outputting the impulse response sequence based on the time length of the time delay delta t, and outputting the impulse response sequence at the moment; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth; performing complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold under a polar coordinate system to obtain a cancellation amplitude; and performing inverse coordinate system conversion on the cancellation amplitude and the phase to obtain signals under a rectangular coordinate system. The embodiment of the application can realize the algorithm improvement on the coordinate system conversion layer by extracting the angle quadrant of the signal (normalizing the signal to the first quadrant) and outputting the impulse response sequence in a real number form, thereby avoiding the angle quadrant calculation in the conversion from the polar coordinate system to the rectangular coordinate system and reducing the circuit area and the chip operation power consumption.
In addition, the embodiment of the application counteracts the time delay variable of the peak value searching module and the time delay variable of the sequence generating module based on the time delay delta t to form fixed time delay, thereby avoiding the module design cost in the aspect of time delay consistency matching and reducing the circuit area and the chip operation power consumption.
Drawings
FIG. 1 is a schematic flow chart of a peak cancellation processing method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a peak cancellation processing device according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a peak cancellation processing module according to an embodiment of the present application;
FIG. 4 is a schematic diagram of signal normalization according to an embodiment of the present application;
FIG. 5 is a diagram showing a timing distribution of signals from a peak search module and a sequence generation module according to an embodiment of the present application.
Detailed Description
The application is described below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings. 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 the related art, a peak value cancellation processing module adopts two complete coordinate system conversions, and the problem of design simplification is not considered from the aspect of algorithm optimization; when the offset amplitude is generated, the delay consistency matching of the data is not realized, so that the introduction of auxiliary signals and modules is caused, the design complexity is increased, the chip area is increased, and the constraint of low-cost realization of the chip is caused. In view of this, it is possible,
the embodiment of the application provides a peak cancellation processing method, as shown in fig. 1, which comprises the following steps:
step 101: normalizing the signal input by the baseband side, and converting the normalized signal from a rectangular coordinate system to a polar coordinate system to obtain the amplitude and the phase corresponding to the signal;
step 102: when the amplitude of the signal is detected, if the maximum amplitude value occurs in the search window, recording the time delay delta t between the starting time of the search window and the occurrence time of the maximum amplitude value;
step 103: determining the moment of outputting the impulse response sequence based on the time length of the time delay delta t, and outputting the impulse response sequence at the moment; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth;
step 104: performing complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold under a polar coordinate system to obtain a cancellation amplitude;
step 105: and performing inverse coordinate system conversion on the cancellation amplitude and the phase to obtain signals under a rectangular coordinate system.
In the embodiment of the application, the method further comprises the following steps:
quadrant information corresponding to the signals is obtained and used for obtaining signals under a rectangular coordinate system in the inverse coordinate system conversion process; the quadrant information is the quadrant information before signal normalization.
In one embodiment of the present application, the method further comprises:
the corresponding real form impulse response sequences are preset based on different signal bandwidths.
In the embodiment of the present application, the determining the time of outputting the impulse response sequence based on the duration of the delay Δt, and outputting the impulse response sequence at the time includes:
beginning to count down at the end time of the search window, wherein the time duration is the time delay delta t;
and outputting the impulse response sequence in a real number form corresponding to the signal bandwidth when the countdown is finished.
In an embodiment of the present application, normalizing the signal input from the baseband side includes:
signals in the second quadrant, the third quadrant and the fourth quadrant which are input on the baseband side are converted into the first quadrant through angle transformation.
In order to implement the above method embodiment, the embodiment of the present application further provides a peak cancellation processing apparatus, as shown in fig. 2, where the apparatus includes:
the coordinate system conversion module 201 is configured to normalize a signal input at the baseband side, and convert the normalized signal from a rectangular coordinate system to a polar coordinate system, so as to obtain an amplitude and a phase corresponding to the signal;
a peak value searching module 202, configured to record a time delay Δt between a start time of the search window and a time when the amplitude of the signal is detected if the amplitude maximum occurs in the search window;
a sequence generating module 205, configured to determine a time of outputting an impulse response sequence based on the duration of the delay Δt, and output the impulse response sequence at the time; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth;
a complex multiplication module 203, configured to perform complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold in a polar coordinate system, so as to obtain a cancellation amplitude;
and the anti-coordinate system conversion module 204 is configured to perform anti-coordinate system conversion on the cancellation amplitude and the phase to obtain a signal under a rectangular coordinate system.
In the embodiment of the present application, the coordinate system conversion module 201 is further configured to obtain quadrant information corresponding to the signal, and is used for obtaining the signal in the rectangular coordinate system in the inverse coordinate system conversion process by the inverse coordinate system conversion module 204; the quadrant information is the quadrant information before signal normalization.
In the embodiment of the present application, the sequence generating module 205 is further configured to store a corresponding real form impulse response sequence preset based on different signal bandwidths.
In an embodiment of the present application,
the peak search module 202 is further configured to send the delay Δt to the sequence generating module at the end time of the search window; in a corresponding manner,
the sequence generating module is further configured to start counting down when the time delay Δt is received, where the timing duration is the time delay Δt; and outputting the impulse response sequence in a real number form corresponding to the signal bandwidth when the countdown is finished.
In the embodiment of the present application, the coordinate system conversion module 201 normalizes the signal input from the baseband side, including:
signals in the second quadrant, the third quadrant and the fourth quadrant which are input on the baseband side are converted into the first quadrant through angle transformation.
The embodiment of the application also provides a peak value cancellation processing device, which comprises: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor, when executing the computer program, performs:
normalizing the signal input by the baseband side, and converting the normalized signal from a rectangular coordinate system to a polar coordinate system to obtain the amplitude and the phase corresponding to the signal;
when the amplitude of the signal is detected, if the maximum amplitude value occurs in the search window, recording the time delay delta t between the starting time of the search window and the occurrence time of the maximum amplitude value;
determining the moment of outputting the impulse response sequence based on the time length of the time delay delta t, and outputting the impulse response sequence at the moment; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth;
performing complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold under a polar coordinate system to obtain a cancellation amplitude;
and performing inverse coordinate system conversion on the cancellation amplitude and the phase to obtain signals under a rectangular coordinate system.
The processor is further configured to execute, when the computer program is executed:
quadrant information corresponding to the signals is obtained and used for obtaining signals under a rectangular coordinate system in the inverse coordinate system conversion process; the quadrant information is the quadrant information before signal normalization.
The processor is further configured to execute, when the computer program is executed:
an impulse response sequence corresponding to a real form is preset based on different signal bandwidths.
The processor is further configured to determine a time when the impulse response sequence is output based on the duration of the delay Δt, and when the impulse response sequence is output at the time, execute:
beginning to count down at the end time of the search window, wherein the time duration is the time delay delta t;
and outputting the impulse response sequence in a real number form corresponding to the signal bandwidth when the countdown is finished.
The processor is further configured to execute, when executing the computer program, when normalizing the signal input on the baseband side:
signals in the second quadrant, the third quadrant and the fourth quadrant which are input on the baseband side are converted into the first quadrant through angle transformation.
It should be noted that: in the apparatus provided in the above embodiment, when performing peak cancellation processing, only the division of each program module is used as an example, in practical application, the processing allocation may be performed by different program modules according to needs, that is, the internal structure of the device is divided into different program modules, so as to complete all or part of the processing described above. In addition, the apparatus provided in the foregoing embodiments and the corresponding method embodiments belong to the same concept, and specific implementation processes of the apparatus and the corresponding method embodiments are detailed in the method embodiments, which are not described herein again.
In an exemplary embodiment, the present application further provides a computer readable storage medium, which may be FRAM, ROM, PROM, EPROM, EEPROM, flash Memory, magnetic surface Memory, optical disk, or CD-ROM; but may be a variety of devices including one or any combination of the above-described memories, such as a mobile phone, computer, tablet device, personal digital assistant, or the like.
The embodiment of the present application also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs:
normalizing the signal input by the baseband side, and converting the normalized signal from a rectangular coordinate system to a polar coordinate system to obtain the amplitude and the phase corresponding to the signal;
when the amplitude of the signal is detected, if the maximum amplitude value occurs in the search window, recording the time delay delta t between the starting time of the search window and the occurrence time of the maximum amplitude value;
determining the moment of outputting the impulse response sequence based on the time length of the time delay delta t, and outputting the impulse response sequence at the moment; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth;
performing complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold under a polar coordinate system to obtain a cancellation amplitude;
and performing inverse coordinate system conversion on the cancellation amplitude and the phase to obtain signals under a rectangular coordinate system.
The computer program, when executed by the processor, further performs:
quadrant information corresponding to the signals is obtained and used for obtaining signals under a rectangular coordinate system in the inverse coordinate system conversion process; the quadrant information is the quadrant information before signal normalization.
The computer program, when executed by the processor, further performs:
an impulse response sequence corresponding to a real form is preset based on different signal bandwidths.
The determining of the time of outputting the impulse response sequence based on the duration of the delay Δt, and when the impulse response sequence is output at this time, the computer program, when executed by the processor, further performs:
beginning to count down at the end time of the search window, wherein the time duration is the time delay delta t;
and outputting the impulse response sequence in a real number form corresponding to the signal bandwidth when the countdown is finished.
When the computer program is executed by the processor, the method further performs:
signals in the second quadrant, the third quadrant and the fourth quadrant which are input on the baseband side are converted into the first quadrant through angle transformation.
The application is described below in connection with scene embodiments.
Fig. 3 is an internal structure and an algorithm flow chart of a peak cancellation processing module in a 5G base station side radio frequency transceiver chip according to this embodiment, and as shown in fig. 3, the peak cancellation processing module includes: a coordinate system conversion module 201 (rectangular to polar), a peak search module 202, a complex multiplication module 203, a sequence generation module 205, a time delay module 206, and an anti-coordinate system conversion module 204 (polar to rectangular).
The working principle of the peak cancellation processing module is as follows:
1. the input data come from an external module, and are input into the peak cancellation processing module in a rectangular coordinate system format, and in order to find the amplitude signal exceeding the threshold value, the input data are input into the coordinate system conversion module 201 (rectangular coordinate system to polar coordinate system);
2. in the coordinate system conversion module 201, the signal is normalized to the first quadrant, that is, the angle is in the range of [90 °,0 ° ], and then the signal in the rectangular coordinate system is iteratively approximated to the corresponding amplitude and phase expression form in the polar coordinate system by the CORDIC algorithm (Coordinate Rotation Digital Computer, coordinate rotation digital calculation), and since the input signal angle range of the CORDIC algorithm is [99 °, 99 ° ], the input signal is usually normalized to the range of [90 °,0 ° ]; the format of the output signal of the coordinate system conversion module 201 (rectangular to polar) is therefore: (1) amplitude, (2) phase (which contains quadrant information). The quadrant normalization method is shown in table 1, and the angle change of the signal is shown in fig. 4.
TABLE 1
3. The peak search module 202 detects the input amplitude of the signal at a time and when the amplitude is greater than a threshold preset by the system, the module starts a search window of "fixed length", as shown in fig. 5, the window length is denoted as l_win. When the maximum amplitude point is found in the window, the time delay deltat between the occurrence time of the maximum amplitude point (value) and the starting time of the search window is saved, and after the search window completes the full window search, the time delay deltat is sent to the sequence generation module 205. Meanwhile, the original signal after the peak search is divided into two signals of amplitude and concomitant phase, wherein the amplitude signal is an amplitude signal exceeding a threshold, and the amplitude signal and the concomitant phase signal are input to the complex multiplication module 203 (in polar coordinates) in synchronization.
4. The sequence generation module 205 is a key module for realizing delay consistency, and the module needs to ensure that the time delay between the maximum value generation time of the impulse response sequence output by the sequence generation module at the time of selection and the time when the maximum value of the signal to be processed exceeding the threshold appears in the peak search module is fixed in time sequence, as shown in fig. 5. Since in the peak search module the delay Δt of the moment of occurrence of the maximum with respect to the moment of start of the search window is output at the moment of end of the search window, the delay Δt is the only variable that maintains the time consistency problem. To eliminate this variable, the variable delay factor is converted to a fixed delay factor, and the embodiment may add a configurable delay module to the sequence generation module to offset the variable delay factor.
The sequence generation module 205, after receiving the delay Δt outputted by the peak search module 202, relies on the configurable delay module to internally delay for a certain time before outputting the impulse response sequence, and the internal delay for a certain time is equal to the delay Δt. The internal delay is offset by the relative impact of the internal delay delta t, so that the maximum value of the signal to be processed and the maximum value of the impulse response sequence keep fixed delay in time, thereby saving design cost to a great extent and reducing the final power consumption of the chip.
5. The complex multiplication (under polar coordinate system) module 203 performs complex multiplication processing under polar coordinate system on the impulse response sequence output by the sequence generation module 205 and the signal to be processed after exceeding the threshold by the peak search module 202.
The output of the sequence generating module is constrained to be in an impulse response sequence mode, and the characteristics of a real sequence of the impulse response sequence are realized through calculation, so that the output of the sequence generating module does not contain an imaginary part, and the realization difficulty of complex multiplication is reduced to a great extent. In addition, the phase information obtained by the coordinate system conversion module is not changed by a complex multiplication (under a polar coordinate system) module, so that the original phase and quadrant format is not required to be unfolded, and the design cost is further saved.
6. The implementation of the coordinate system conversion module 204 (from polar coordinate system to rectangular coordinate system) benefits from the phase and quadrant separation processing performed by the coordinate system conversion module 201 (from rectangular coordinate system to polar coordinate system), and the real part sequence output of the sequence generation module 205, where the input data still maintains the phase and quadrant separation mode, and the module still converts the signal in the polar coordinate system into the signal in the rectangular coordinate system through the CORDIC algorithm. Because quadrant normalization processing steps required by the CORDIC algorithm are avoided, chip design and area overhead are reduced to some extent.
FIG. 5 is a graph showing the timing sequence of the signal passing through the peak search module and the sequence generation module, wherein the timing sequence of the graph is right, left and then right. As shown in fig. 5, the time delay between the B time point and the E time point in the present embodiment is a fixed value irrespective of the relative position where the B time point occurs within the search window (between the a time point and the C time point).
For the peak search module:
at time a: the amplitude of the signal exceeds a search threshold (preset threshold), and a search window is opened; the width of the search window is preset in advance, and different signal bandwidths (such as home base station scene nr+lte=120 MHz) correspond to different preset width values;
time point B: the amplitude value has a maximum value; the chip cannot determine whether the amplitude at time B is the final maximum point in the search window at this time, because the search window is not finished at this time; the chip records the time difference between the A-B time points at the moment;
at time C: ending the search window; the chip determines the amplitude value at the B time point as the maximum value searched at this time, and transmits the time difference (namely the time difference between the recorded A-B time points) of the B time point relative to the A time point to the sequence generating module.
For the sequence generation module:
at time C: the sequence generating module starts counting down after receiving the time difference value between the time points A and B from the peak searching module at the time point C, and the counting initial value is the time difference between the time points A and B;
at time D: after timing is finished, starting to sequentially output a counteracting sequence (impulse response sequence) outwards, wherein the counteracting sequence is preset in advance, and different signal bandwidths (such as home base station scene NR+LTE=120 MHz) correspond to different counteracting sequence preset values; the preset value is an impulse response sequence generated by an FIR filter, has time sequence symmetry and has the maximum value at the center.
At time E: at this time, the cancellation sequence outputs its center maximum value. To this end, see again the time difference between B-E time points:
b_e time difference = b_c+c_d+d_e;
C_D＝A_B；
a_b+b_c=search window width (fixed value);
d_e=half (fixed value) of the impulse response sequence;
thus b_e time difference = search window width (fixed value) + half of the impulse response sequence (fixed value), is a fixed value.
Therefore, the embodiment of the application can realize the algorithm improvement on the coordinate system conversion level by the low-cost implementation method for the peak value cancellation processing of the radio frequency transceiver chip at the 5G base station side, and the angular quadrant calculation in the conversion from the polar coordinate system to the rectangular coordinate system is avoided by extracting the angular quadrants of the signals, so that the circuit area and the chip operation power consumption are reduced.
In addition, the delay variable of the peak value searching module can be counteracted with the delay variable of the sequence generating module to form fixed delay (group delay), so that module design expenditure in the aspect of delay consistency matching is avoided, and circuit area and chip operation power consumption are reduced.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the present application.
Claims (10)
1. A method of peak cancellation processing, the method comprising:
normalizing the signal input by the baseband side, and converting the normalized signal from a rectangular coordinate system to a polar coordinate system to obtain the amplitude and the phase corresponding to the signal;
when the amplitude of the signal is detected, if the maximum amplitude value occurs in the search window, recording the time delay delta t between the starting time of the search window and the occurrence time of the maximum amplitude value;
determining the moment of outputting the impulse response sequence based on the time length of the time delay delta t, and outputting the impulse response sequence at the moment; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth;
performing complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold under a polar coordinate system to obtain a cancellation amplitude;
and performing inverse coordinate system conversion on the cancellation amplitude and the phase to obtain signals under a rectangular coordinate system.
2. The method according to claim 1, characterized in that the method further comprises:
quadrant information corresponding to the signals is obtained and used for obtaining signals under a rectangular coordinate system in the inverse coordinate system conversion process; the quadrant information is the quadrant information before signal normalization.
3. The method according to claim 1, characterized in that the method further comprises:
the corresponding real form impulse response sequences are preset based on different signal bandwidths.
4. The method of claim 1, wherein the determining a time instant at which to output the impulse response sequence based on the duration of the delay Δt and outputting the impulse response sequence at the time instant comprises:
beginning to count down at the end time of the search window, wherein the time duration is the time delay delta t;
and outputting the impulse response sequence in a real number form corresponding to the signal bandwidth when the countdown is finished.
5. The method of claim 1, wherein normalizing the baseband side input signal comprises:
signals in the second quadrant, the third quadrant and the fourth quadrant which are input on the baseband side are converted into the first quadrant through angle transformation.
6. A peak cancellation processing apparatus, comprising:
the coordinate system conversion module is used for normalizing the signals input by the baseband side, and converting the normalized signals from a rectangular coordinate system to a polar coordinate system to obtain the corresponding amplitude and phase of the signals;
the peak value searching module is used for recording the time delay delta t between the starting time of the searching window and the appearance time of the amplitude maximum value if the amplitude maximum value appears in the searching window when the amplitude of the signal is detected;
the sequence generation module is used for determining the moment of outputting the impulse response sequence based on the time length of the time delay delta t and outputting the impulse response sequence at the moment; wherein the impulse response sequence is: an impulse response sequence in real form corresponding to the signal bandwidth;
the complex multiplication module is used for carrying out complex multiplication processing on the impulse response sequence and the amplitude exceeding a preset threshold under a polar coordinate system to obtain a cancellation amplitude;
and the anti-coordinate system conversion module is used for carrying out anti-coordinate system conversion on the opposite cancellation amplitude and the phase to obtain signals under a rectangular coordinate system.
7. The apparatus of claim 6, wherein the sequence generation module is further configured to store corresponding real form impulse response sequences preset based on different signal bandwidths.
8. The apparatus of claim 6, wherein the device comprises a plurality of sensors,
the peak value searching module is further configured to send the time delay Δt to the sequence generating module at the end time of the search window; in a corresponding manner,
the sequence generating module is further configured to start counting down when the time delay Δt is received, where the timing duration is the time delay Δt; and outputting the impulse response sequence in a real number form corresponding to the signal bandwidth when the countdown is finished.
9. A peak cancellation processing apparatus, comprising: a processor and a memory for storing a computer program capable of running on the processor,
wherein the processor is adapted to perform the steps of the method of any of claims 1-5 when the computer program is run.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210548153.4A CN117135644B (en) | 2022-05-18 | 2022-05-18 | Peak cancellation processing method, device and computer readable storage medium |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110050844A (en) * | 2009-11-09 | 2011-05-17 | 엘지에릭슨 주식회사 | Apparatus and method for extracting reference cancellation pulse in multi-carrier system and peak cancellation crest factor reduction system for the same |
| CN103188199A (en) * | 2013-03-22 | 2013-07-03 | 中兴通讯股份有限公司 | Broadband peak clipping method and broadband peak clipping device based on fractional delay CPG (Certified Program Generator) |
| WO2014183627A1 (en) * | 2013-09-16 | 2014-11-20 | 中兴通讯股份有限公司 | Filter scheduling method and system |
| US20170302490A1 (en) * | 2014-12-31 | 2017-10-19 | Huawei Technologies Co., Ltd. | Signal Clipping Processing Method and Device |
| CN112019471A (en) * | 2019-05-30 | 2020-12-01 | 中兴通讯股份有限公司 | Peak clipping method and device based on multiphase structure and computer storage medium |
-
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20110050844A (en) * | 2009-11-09 | 2011-05-17 | 엘지에릭슨 주식회사 | Apparatus and method for extracting reference cancellation pulse in multi-carrier system and peak cancellation crest factor reduction system for the same |
| CN103188199A (en) * | 2013-03-22 | 2013-07-03 | 中兴通讯股份有限公司 | Broadband peak clipping method and broadband peak clipping device based on fractional delay CPG (Certified Program Generator) |
| WO2014183627A1 (en) * | 2013-09-16 | 2014-11-20 | 中兴通讯股份有限公司 | Filter scheduling method and system |
| US20170302490A1 (en) * | 2014-12-31 | 2017-10-19 | Huawei Technologies Co., Ltd. | Signal Clipping Processing Method and Device |
| CN112019471A (en) * | 2019-05-30 | 2020-12-01 | 中兴通讯股份有限公司 | Peak clipping method and device based on multiphase structure and computer storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 何二朝;邵思飞;马如慧;: "一种利用峰值信号降低OFDM系统峰均比的方法", 现代电子技术, no. 22, 15 November 2009 (2009-11-15) * |
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