CN107438261B - Peak-to-average ratio detection device and method, and mobile communication device - Google Patents
Peak-to-average ratio detection device and method, and mobile communication device Download PDFInfo
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H—ELECTRICITY
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- H04B17/30—Monitoring; Testing of propagation channels
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- H04L27/00—Modulated-carrier systems
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- H04L27/2601—Multicarrier modulation systems
- H04L27/2614—Peak power aspects
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Abstract
A peak-to-average ratio detection apparatus comprising: the detection control module is used for receiving a detection trigger signal and a configuration signal so as to generate a control signal according to the detection trigger signal and the configuration signal; the instantaneous power detection module is used for detecting the instantaneous power of the detection signal according to the control signal; the average power calculation module is used for calculating the average power of the instantaneous power detected by the instantaneous power detection module; the comparison sorting module is used for sorting the detected instantaneous power to obtain the instantaneous power at the target sorting position; and the data processing module is used for calculating the peak-to-average ratio of the detection signals according to the average power and the instantaneous power at the target sequencing position. The peak-to-average ratio detection device can detect the signal peak-to-average ratio of the mobile equipment in real time during operation, and improves the dimension measurable function of the mobile communication equipment. The invention also relates to a peak-to-average ratio detection method and a mobile communication device.
Description
Technical Field
The invention relates to the technical field of mobile communication digital signal processing, in particular to a peak-to-average ratio detection device and method, and also relates to mobile communication equipment.
Background
The Peak-to-Average Power Ratio (PAPR) is defined as the Ratio of the Peak Power to the Average Power of a signal over a period of detection time. The industry generally uses an index where the probability of occurrence of the peak-to-average ratio is less than 0.01% as the peak-to-average ratio of the detection signal, and uses the maximum value in the detection period as a reference index. Too high a peak-to-average ratio means higher instantaneous power. Because the linear region of the power amplifier is limited, a larger instantaneous signal enters the nonlinear region of the power amplifier, so that the signal is subjected to nonlinear distortion, signal distortion and spectrum expansion are caused, and the system performance is seriously reduced. Therefore, the peak-to-average ratio is an important indicator in designing power amplifiers in devices such as mobile communication base stations. With the progress of the mobile communication base transceiver station from narrow band to wide band and ultra wide band, the signal configuration bandwidth is increased from original tens of MHz to hundreds of MHz from single band to double band and even to multi-band. The traditional peak-to-average ratio test method adopts a spectrum analyzer with large broadband analysis capability, such as Agilent and Roder Schwarz analyzers, to carry out test analysis. The testing method can not detect the signal peak-to-average ratio in real time when the mobile communication equipment runs.
Disclosure of Invention
Based on this, there is a need to provide a peak-to-average ratio detection apparatus and method capable of monitoring the peak-to-average ratio of a signal in real time during the operation of a mobile communication device, and also provide a mobile communication device.
A peak-to-average ratio detection apparatus comprising: the detection control module is used for receiving a detection trigger signal and a configuration signal so as to generate a control signal according to the detection trigger signal and the configuration signal; the instantaneous power detection module is connected with the detection control module and is used for detecting the instantaneous power of the detection signal according to the control signal; the average power calculation module is connected with the instantaneous power detection module and used for calculating the average power of the instantaneous power detected by the instantaneous power detection module; the comparison sorting module is connected with the instantaneous power detection module and used for sorting the instantaneous power detected by the instantaneous power detection module to obtain the instantaneous power at a target sorting position; and the data processing module is respectively connected with the comparison sorting module and the average power calculation module and is used for calculating the peak-to-average ratio of the detection signals according to the average power and the instantaneous power at the target sorting position.
A peak-to-average ratio detection method comprises the following steps: receiving a detection trigger signal and a configuration signal; generating a control signal according to the detection trigger signal and the configuration signal; detecting the instantaneous power of a detection signal according to the control signal; calculating an average power of the detected instantaneous power; sorting the detected instantaneous power to obtain the instantaneous power at the target sorting position; and calculating a peak-to-average ratio of the detection signal according to the average power and the instantaneous power at the target ranking position.
A mobile communication device comprises a digital intermediate frequency processing module and a radio frequency analog circuit module; the output end of the digital intermediate frequency processing module is connected with the input end of the radio frequency analog circuit module; the mobile communication device further comprises a peak-to-average ratio detection apparatus as described in any of the previous embodiments; and an instantaneous power detection module in the peak-to-average ratio detection device is connected with the digital intermediate frequency processing module.
In the peak-to-average ratio detection device, the instantaneous power detection module detects the instantaneous power in the detection signal under the control of the detection control module, the average power calculation module calculates the average power according to the detected instantaneous power, the comparison sorting module sorts the detected instantaneous power to obtain the instantaneous power at the target sorting position, and the data processing module can obtain the corresponding peak-to-average ratio according to the obtained average power and the instantaneous power at the target sorting position. The peak-to-average ratio detection device can detect the signal peak-to-average ratio of the mobile equipment in real time during operation, and improves the dimension measurable function of the mobile communication equipment, thereby achieving the purpose of monitoring the characteristics of the detection signal.
Drawings
FIG. 1 is a block diagram of a mobile communication device in one embodiment;
FIG. 2 is a schematic diagram of an exemplary peak-to-average power ratio detection apparatus;
FIG. 3 is a schematic structural diagram of an apparatus for peak-to-average ratio detection in another embodiment;
FIG. 4 is a flowchart of a method for peak-to-average ratio detection in an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a schematic structural diagram of a mobile communication device in an embodiment. The mobile communication device may be a transceiver disposed within a mobile communication base station. Referring to fig. 1, the mobile communication device includes a digital intermediate frequency processing module 110 and a radio frequency analog circuit module 120. The digital if processing module 110 is configured to process the baseband signal to obtain an if signal, and output the if signal to the rf analog circuit module 120. The processed if signal enables the rf analog circuit module 120 to operate stably and reduce interference. Specifically, the Digital intermediate frequency processing module 110 includes a Digital Up conversion module (DUC) 112, a peak Reduction module (CFR) 114, and a Digital Pre-Distortion module (DPD) 116, which are connected in sequence, so as to sequentially perform Up-conversion, peak Reduction, and Digital Pre-Distortion processing on the baseband signal to obtain a required intermediate frequency signal. The rf Analog circuit module 120 includes a Digital to Analog Converter (DAC) (not shown) for converting the Digital if signal into an Analog if signal and outputting the Analog if signal to the subsequent circuit part. The digital-to-analog converter is connected to the digital predistortion module 116. In this embodiment, the mobile communication device further includes a baseband signal processing module 130, so as to process the baseband signal and output the processed baseband signal to the digital intermediate frequency processing module 110.
The mobile communication device further comprises a peak-to-average ratio detection means 140. The peak-to-average ratio detection device 140 is connected to the digital intermediate frequency processing module 110, and is configured to detect a peak-to-average ratio of an intermediate frequency signal (detection signal) in the digital intermediate frequency processing module 110, so that the mobile communication device can take corresponding suppression measures according to the detected signal peak-to-average ratio, and avoid problems such as signal distortion and spectrum spreading caused by an excessively large peak-to-average ratio, thereby improving system performance. In this embodiment, the peak-to-average ratio detection apparatus 140 may be connected after the digital up-conversion module 112 and before the peak clipping module 114, or connected after the peak clipping module 114 and before the digital pre-distortion module 116, or connected after the digital pre-distortion module 116 and before the digital-to-analog converter 122, so as to support the multi-point peak-to-average ratio detection function.
Fig. 2 is a schematic structural diagram of the peak-to-average ratio detection apparatus 140 in an embodiment. The peak-to-average ratio detection apparatus 140 includes a detection control module 210, an instantaneous power detection module 220, an average power calculation module 230, a comparison sorting module 240, and a data processing module 250. The detection control module 210 is connected to the instantaneous power detection module 220, the average power calculation module 230, and the comparison and sorting module 240, respectively, to output different control signals to control the operations of the modules. Specifically, the detection control module 210 is connected to a control module (not shown) in the mobile communication device to receive the detection trigger signal and the configuration information sent by the control module. The detection trigger signal is used to control the peak-to-average ratio detection device 140 to start the peak-to-average ratio detection operation, and the configuration information is used for the peak-to-average ratio detection module 140 to configure the relevant parameters. In the present embodiment, the configuration signal includes detection position information. The detection control module 210 generates a control signal according to the received detection trigger signal and the configuration information, and outputs the control signal to each module. The generated control signal includes the detected position information to control the instantaneous power detection module 220 to detect the instantaneous power at the position.
The instantaneous power detection module 220 is used to detect the instantaneous power of the signal at the detection position and output the detected instantaneous power to the average power calculation module 230. In this embodiment, the configuration information further includes a detection sample length n, and therefore, the control signal generated by the detection control module 210 also includes the detection sample length n. The instantaneous power detection module 220 detects the instantaneous power of the detection signal at the detection position according to the control signal to obtain an instantaneous power sequence of the detection sample length n. In this embodiment, the detection sample length n represents the number of statistical points of the continuously detected instantaneous power. The instantaneous power sequence x (n) detected by the instantaneous power detection module 220 is:
X(n)＝{P1,P2,P3,…Pn,}。
the average power calculating module 230 is connected to the instantaneous power detecting module 220 for calculating the average power P of the instantaneous power detected by the instantaneous power detecting module 220avg。
The comparison sorting module 240 is connected to the instantaneous power detection module 220 for sorting the instantaneous power detected by the instantaneous power detection module 220 to obtain the instantaneous power at the target sorting position. The comparison sorting module 240 may sort all instantaneous powers within the instantaneous power sequence X (n) in order from small to large or in order from large to small, thereby forming a new power sequence X' (n):
X′(n)＝{P′1,P′2,P′3,…P′n,}。。
in this embodiment, the peak-to-average ratio at which the probability of occurrence of the peak-to-average ratio is less than or equal to 0.01% is used as the statistical peak-to-average ratio of the detection signal, and the maximum peak-to-average ratio is used as the reference index. According to the definition of PAPR:
wherein p ispeakIs the peak power, pavgIs the mean power. Therefore, it is only necessary to acquire the instantaneous power p at which the instantaneous power occurrence probability is less than or equal to 0.01%mAnd maximum instantaneous power pmaxAnd (4) finishing. Instantaneous power pmThe relationship between the position m in the new instantaneous power sequence X' (n) and the detected sample length n is as follows:
m＝n-n×0.01％。。
therefore, in ranking the instantaneous powers, only the ranking of the instantaneous power between the position m and the position of the maximum instantaneous power (i.e., the maximum detected sample length n) needs to be determined. At this time, the comparing and sorting module 240 can sort the instantaneous power of the position part only by setting (n-m +1) comparators, so that the complexity and the implementation cost of the comparing and sorting module 240 can be greatly reduced. For example, when the detection sample length n is 32768, then m is 32765, the comparison sorting module 240 needs 4 comparators to sort and reserve the largest last 4 bits in the instantaneous power sequence. If the detected sample length n is 65536 and m is 65530, the compare-sort module 240 requires 7 comparators to sort and retain the largest last 7 bits in the instantaneous power sequence. The compare-order module 240 also latches the instantaneous power pmAnd maximum instantaneous power pmax。
The data processing module 250 is connected to the average power calculation module 230 and the comparison sorting module 240, respectively. The data processing module 250 is configured to calculate a peak-to-average ratio according to the average power calculated by the average power calculating module 230 and the instantaneous power at the target ranking position obtained by the comparison ranking module 240. Specifically, the data processing module 250 reduces the instantaneous power p at which the instantaneous power occurrence probability is less than or equal to 0.01%mAnd averagePower pavgComparing to obtain the PAPR of the detected signalm：
The data processing module 250 is also arranged to convert the maximum instantaneous power pmaxAnd average power pavgComparing to obtain the reference index PAPR of the peak-to-average ratio of the detection signalmax：
In the apparatus for peak-to-average ratio detection, the instantaneous power detection module 220 detects the instantaneous power in the detection signal under the control of the detection control module 210, the average power calculation module 230 calculates the average power according to the detected instantaneous power, and the comparison and sorting module 240 sorts the detected instantaneous power to obtain the instantaneous power at the target sorting position. The data processing module 250 can therefore derive the corresponding peak-to-average ratio based on the obtained average power and the instantaneous power at the target rank position. The peak-to-average ratio detection device can detect the signal peak-to-average ratio of the mobile equipment in real time during operation, and improves the dimension measurable function of the mobile communication equipment, thereby achieving the purpose of monitoring the characteristics of the detection signal.
Fig. 3 is a schematic structural diagram of a peak-to-average ratio detection apparatus in another embodiment. The peak-to-average ratio detection device comprises a detection control module 310, a data routing module 320, an instantaneous power detection module 330, an average power calculation module 340, a comparison sorting module 350, a data multiplexing module 360, a data storage module 370 and a data processing module 380. The detection control module 310, the data routing module 320, the instantaneous power detection module 330, the average power calculation module 340, the comparison sorting module 350, the data multiplexing module 360, and the data storage module 370 may be implemented by a Programmable Gate Array (FPGA) or an Integrated Circuit (IC), and the data processing module 380 may be implemented by a CPU.
The detection control module 310 is respectively connected with the data routing module 320, the instantaneous power detection module 330, the average power detection module 340, the comparison sorting module 350, the data multiplexing module 360 and the data storage module 370. The detection control module 310 is configured to generate four control signals (A, B, C and D) according to the detection trigger signal and the configuration information sent by the main control module in the mobile communication device. The configuration information includes header information of the signal frame, effective detection flag, length n of the detection sample, detection position information, and the like. The detection control module 310 generates a control signal only when the configuration information includes the above information to reduce the probability of erroneous operation.
The data routing module 320 is configured to receive the control signal a output by the detection control module 310. The control signal a includes a detected position signal, so as to control the data routing module 320 to access the detected position. The control signal a is also used to control the data routing module 320 to select the input signal. In this embodiment, the mobile communication device can support the transmission of single band signals, dual band signals, and multi-band signals. Therefore, the data routing module 320 may select one or more frequency band signals under the control of the control signal a, so as to control the peak-to-average ratio detection device to detect the peak-to-average ratio of the selected frequency band signal. In this embodiment, the multi-channel frequency band signal includes two or more channel frequency band signals.
The control signal a is further used to control the data routing module 320 to select the peak-to-average ratio statistical mode after selecting the multiple frequency band signals. The data routing module 320 determines a peak-to-average ratio statistical mode according to the control signal a and then performs corresponding processing on the selected multiple frequency band signals. Specifically, the peak-to-average ratio statistical mode includes at least one of a signal vector and peak-to-average ratio statistical mode, a signal modulus and peak-to-average ratio statistical mode, a signal power and a statistical mode, thereby enabling the peak-to-average ratio detection apparatus to support a plurality of statistical modes. The data routing module 320 is provided therein with a corresponding processing unit so that the processed signal can satisfy the requirement of the statistical model. At least one processing unit of a mixing and combining unit, a modulus summing unit and a power summing unit is disposed in the data routing module 320. The mixing and combining unit mixes and combines the selected multi-channel target frequency band signals through an NCO (digital oscillator) to form a processed signal and outputs the processed signal to the instantaneous power detection module 330, thereby controlling the peak-to-average ratio detection device to realize multi-band signal vector and peak-to-average ratio statistics. The module value summing unit is used for summing the module values of the selected multi-band signals to form a processing signal and outputting the processing signal to the instantaneous power detection module 330, thereby controlling the peak-to-average ratio detection device to realize the statistics of the module values and the peak-to-average ratios of the multi-band signals. The power summing unit is used for performing power summation on the selected multi-band signal to form a processed signal and outputting the processed signal to the instantaneous power detection module 330, so that the peak-to-average ratio detection device is controlled to realize the statistics of the power and the peak-to-average ratio of the multi-band signal.
The following describes the operation of the data routing module 320 in further detail by taking an example of a bandwidth configuration supporting a 1.8G +2.1G dual-band 365M in the mobile communication device. The data routing module 320 may select only one signal in the 1.8G or 2.1G frequency band to send to the instantaneous power detection module 330, or may select two signals of 1.8G and 2.1G to send to the instantaneous power detection module 330 at the same time. When the data routing module 320 selects only one signal in the 1.8G or 2.1G frequency band to send to the instantaneous power detection module 330, the statistical result is the signal peak-to-average ratio of the 1.8G or 2.1G frequency band, so that the peak-to-average ratio detection device can support the peak-to-average ratio detection of the 1.8G frequency band or can support the peak-to-average ratio detection of the 2.1G frequency band. When the data routing module 320 selects two signals of 1.8G and 2.1G at the same time, the statistical mode may be selected: when the signal vector and peak-to-average ratio statistic mode is selected, the two paths of signals are mixed and combined through an NCO (digital oscillator), and the combined signals are sent to an instantaneous power detection module 330, so that the 1.8G and 2.1G dual-frequency band signal vector and peak-to-average ratio statistics is completed; when the signal module value and peak-to-average ratio statistic mode is selected, the module values of the two paths of signals are summed and then output to the instantaneous power detection module 330, so that the module value and peak-to-average ratio statistics of the 1.8G and 2.1G dual-band signals are completed; when the signal power and peak-to-average ratio statistical mode is selected, the power of the two signals is summed and then output to the instantaneous power detection module 330, so as to complete the statistics of the power and peak-to-average ratio of the 1.8G and 2.1G dual-band signals. By setting various statistical modes, the statistical dimensionality of the peak-to-average ratio can be increased, and then the corresponding statistical mode can be selected according to the requirement so as to meet the design requirement of the mobile communication equipment. For example, when the signal characteristics of the power amplifier in the digital predistortion module 116 and the rf analog circuit module 120 entering the post-stage of the peak clipping module 114 need to be comprehensively evaluated, a statistical analysis may be performed by using a signal modulus and a peak-to-average ratio statistical mode or a signal power and a peak-to-average ratio statistical mode.
The instantaneous power detection module 330 is configured to receive the control signal B output by the detection control module 310, detect the instantaneous power of the processing signal processed by the data routing module 320 under the control of the control signal B, and form an instantaneous power sequence output. The control signal B contains the length n of the detection sample. The detection sample length n is used to control the number of statistical points of the instantaneous power. The instantaneous power detection module 330 detects the instantaneous power of the processed signal within the detection sample length n to obtain the instantaneous power of the corresponding statistical point number. Specifically, the instantaneous power detection module 330 detects an in-phase component I and a quadrature component Q in the input detection signal (IQ signal), so as to calculate the instantaneous power P according to the detected in-phase component I and quadrature component Q, where the calculation formula is as follows:
the average power calculating module 340 is configured to receive the control signal B output by the detection control module 310 and operate under the control of the control signal B. The average power calculation module 340 is used for calculating the average power P of the instantaneous power sequence output by the instantaneous power detection module 330avg. In the practical engineering application process, in order to obtain a stable peak-to-average ratio statistical result, a longer detection sample length n is needed. However, when the detected sample length n is longer, the number of comparators required by the comparison sorting module 350 may increase, thereby increasing the implementation cost of the comparison sorting module 350. Therefore, in the present embodiment, the detection sample length n is divided into a plurality of reference statistical unit lengths n'And then, taking each reference statistical unit length n 'as a calculation unit to perform corresponding calculation, and outputting the calculation result of each reference statistical unit length n'. Therefore, in the present embodiment, the control signal B may directly include the detection sample length n, or may indirectly include the detection sample length n. When the detection sample length n is indirectly included, the control signal B includes the number of times k of statistics and the reference statistical unit length n'. The detection sample length n is therefore:
n＝k×n′。
in other embodiments, a default reference statistical unit length n 'may be set in the peak-to-average ratio detection apparatus, for example, n' is set to 32768. At this time, the control signal B only needs to include the statistical number k, that is, the configuration information only needs to include the statistical number k. The average power calculation module 340 calculates the average power P for the instantaneous power within each reference statistic unit length navgi(i is between 0 and k) and output to the digital multiplexing module 360. After the average power calculation module 340 finishes the calculation of the average power of the instantaneous power within the current reference statistical unit length n ', the average power calculation module performs the average power calculation on the instantaneous power within the next reference statistical unit length n' until k times of statistical processes are executed.
The compare-sort module 350 receives the instantaneous power sequence output by the detection control module 310 and sorts the instantaneous power sequence to obtain the instantaneous power at the target sort location. In this embodiment, the comparison sorting module 350 sorts the instantaneous power sequence within each reference statistical unit length n ', and obtains the instantaneous power at the sorted target sorting position within each reference statistical unit length n'. In the present embodiment, the compare-sort module 350 includes a sequential comparator bank 352, a sort unit 354, and a register bank 356. The comparator group 352 is connected to the detection control module 310 and the instantaneous power detection module 320, respectively. The register set 356 is also connected to the data multiplexing module 360 and the comparator set 352. The comparator group 352 is used to compare the detected instantaneous power with the maximum instantaneous power in the register group 356 and generate a level signal according to the comparison result. The sorting unit 354 is used for sorting the signals according to the levelThe magnitude relation of the signs adjusts the position sequence between each instantaneous power from small to large. Register set 356 is used to latch the instantaneous power at the sorted target sort location. In the present embodiment, each reference statistical unit length n' is set to 32768, and the instantaneous power p at which the instantaneous power occurrence probability is less than or equal to 0.01%mThe position m in the sorted length n' of the reference statistical unit is 32765, and at this time, 4 comparators are required to be arranged in the comparator group 352, that is, the length l of the comparator group 352 is 4. Accordingly, register set 356 also has a length l of 4. In other embodiments, the length l of the comparator bank 352 and the register bank 356 may be determined according to the target peak-to-average ratio and the reference statistical unit length n'.
In the present embodiment, register set 356 includes a first register set R1 (R1)0,R11,R12,…,R1l-1And a second register set R2 (R2)0,R21,R22,…,R2l-1,). Wherein the first register set R1 is used for storing l maximum instantaneous powers, respectively p0，p1，p2，……，pl-1. Wherein p is0Maximum, corresponds to pmax，pl-1Is the minimum instantaneous power among the maximum instantaneous powers, corresponding to pm. The default values of the stored i maximum instantaneous powers in the first register set R1 are all 0 when the compare-sort module 350 is not in operation. A second register bank R2 is used to store intermediate states of the comparison process. The comparison and sorting steps of the comparison and sorting module 350 are as follows:
(1) the current instantaneous power piTo R2jJ is 0, i is between 1 and n'.
(2) R2jAnd R1jA comparison is made. If R2jGreater than or equal to R1jThen R1 is addedjValue of (5) to R2j+1And R2jValue of (5) to R1j. When R2jLess than R1jThen R2 is addedjValue of (5) to R2j+1。
(3) And after j +1, judging whether j +1 is equal to l, if not, executing the step (2), and if so, executing the step (4).
4) After i +1, judging whether i +1 is larger than n', if not, returning to execute the step (1) and the subsequent steps; if so, it indicates that the ordering of the instantaneous power within the current reference statistic unit length n' is complete. Register set 356 orders instantaneous power within current reference statistic unit length n' for R1 in first register set R10And R1l-1The value at the address is also (p)maxAnd pm) And outputting the result to the data multiplexing module 360, and entering the sorting of the length n' of the next reference statistical unit until the k times of statistics are completed. The comparison sorting module 350 and the average power calculation module 340 may be performed synchronously, thereby improving data processing efficiency.
The data multiplexing module 360 is also connected to the detection control module 310 to receive the control signal C. The data multiplexing module 360 is further configured to receive the output signals of the average power calculation module 340 and the comparison sorting module 350. The control signal C is used to control the data multiplexing module 360 to multiplex the output signals of the average power calculation module 340 and the comparison sorting module 350. Specifically, the data multiplexing module 360 is used for receiving the statistical result pm、pmax、pavgAnd output to the data storage module 370 after serial conversion, so that the data storage module 370 stores the data.
The data storage module 370 is used for storing the statistical result of the length n' of each reference statistical unit. To facilitate post-computation, the address space [0, k-1] in the data storage module 370 is used]Storing k PmAddress space [ k, 2k-1]]Storing k PmaxAddress space [2k, 3k-1]]Storing k Pavg. The data stored in the data storage module 370 is denoted as P (i), i ranges from 0 to 3 k-1.
The data processing module 380 is used for performing calculation processing according to the data p (i) stored in the data storage module 370 to obtain the statistical PAPRmAnd maximum peak-to-average ratio (PAPR)max. In particular, data processing block 380 maps to address space [0, k-1] in data storage block 370]The data of (2) were read and averaged to obtain P1.
The data processing block 380 also reads the data in the address space [ k, 2k-1] of the data storage block 370 and finds the maximum value P2.
P2＝10lg(max(P(i)))dB i∈[2k,2k-1]。
The data processing block 380 also needs to read the data in the address space [2k, 3k-1] of the data storage block 370 and find the total average power P3.
Therefore, the resulting PAPR at 0.01% peak-to-average ratiomComprises the following steps: PAPRm＝P1-P3。
Resulting PAPR at maximum Peak-to-average ratio maxmaxComprises the following steps: PAPRmax＝P2-P3。
The peak-to-average ratio detection device can detect the signal peak-to-average ratio of the mobile equipment in real time during operation, and improves the dimension measurable function of the mobile communication equipment, thereby achieving the purpose of monitoring the characteristics of the detection signal. Meanwhile, the detection frequency band and the peak-to-average ratio statistical mode can be selected through the data reason module 320, so that various statistical modes are supported, the signal peak-to-average ratio can be subjected to statistical analysis from a plurality of statistical dimensions, and the dependence on the signal analysis bandwidth of a frequency spectrograph and the frequency spectrograph in the peak-to-average ratio detection process is avoided. The peak-to-average ratio detection device can be applied to ultra-wideband and multi-spectrum mobile communication equipment.
FIG. 4 is a flowchart of a method for peak-to-average ratio detection in an embodiment. The peak-to-average ratio detection method can be realized by the peak-to-average ratio detection device and comprises the following steps.
And S410, receiving a detection trigger signal and a configuration signal.
And S420, generating a control signal according to the detection trigger signal and the configuration signal.
And S430, detecting the instantaneous power of the detection signal according to the control signal.
S440, calculating the average power of the detected instantaneous power.
S450, sorting the detected instantaneous power to obtain the instantaneous power at the target sorting position.
Wherein, S450 and S440 can also be performed synchronously to improve the processing efficiency.
And S460, calculating the peak-to-average ratio of the detection signal according to the average power and the instantaneous power at the target sorting position.
By the peak-to-average ratio detection method, the signal peak-to-average ratio of the mobile communication equipment in operation can be detected in real time, and the dimension measurable function of the mobile communication equipment is perfected, so that the aim of monitoring the characteristics of the detected signal is fulfilled.
It will be understood by those skilled in the art that all or part of the processes in the methods of the embodiments described above may be implemented by hardware related to instructions of a computer program, which may be stored in a computer readable storage medium, for example, in the storage medium of a computer system, and executed by at least one processor in the computer system, so as to implement the processes of the embodiments including the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A peak-to-average ratio detection apparatus, comprising:
the detection control module is used for receiving a detection trigger signal and a configuration signal to generate a control signal according to the detection trigger signal and the configuration signal, wherein the configuration signal comprises a reference statistical unit length and a statistical frequency; the control signal comprises the length of the reference statistical unit and the statistical times;
the instantaneous power detection module is connected with the detection control module and is used for detecting the instantaneous power of the detection signal according to the control signal;
the average power calculation module is connected with the instantaneous power detection module and used for calculating the average power of the instantaneous power in each length of the reference statistical unit according to the length of the reference statistical unit;
the comparison sorting module is connected with the instantaneous power detection module and used for sorting the instantaneous power in each length of the reference statistical unit according to the length of the reference statistical unit so as to count the instantaneous power at the target sorting position in the length of the reference statistical unit; and
and the data processing module is respectively connected with the comparison sorting module and the average power calculation module and is used for calculating the peak-to-average ratio of the detection signals according to the average power and the instantaneous power at the target sorting position.
2. The apparatus of claim 1, further comprising a data routing module; the data routing module is respectively connected with the detection control module and the instantaneous power detection module; and the data routing module is used for selecting a target frequency band signal in the detection signal under the control of the control signal and outputting the target frequency band signal to the instantaneous power detection module.
3. The apparatus of claim 2, wherein the data routing module is further configured to select a peak-to-average ratio statistical mode, and output the detection signal to the instantaneous power detection module after performing corresponding processing on the detection signal according to the selected statistical mode.
4. The apparatus of claim 3, wherein the peak-to-average ratio statistical mode comprises at least one statistical mode selected from a signal vector and peak-to-average ratio statistical mode, a signal peak and peak-to-average ratio statistical mode, a signal power and peak-to-average ratio statistical mode; the peak-to-average ratio statistic module comprises at least one of a mixing combiner unit, a module value summing unit and a power summing unit; the frequency mixing and combining unit is used for performing frequency mixing and combining on the multiple target frequency band signals selected by the data routing module to form processed signal output; the module value summing unit is used for summing module values of the multi-channel target frequency band signals selected by the data routing module to form a processed signal output; and the power summing unit is used for summing the power of the multi-path target frequency band signals selected by the data routing module to form a processed signal output.
5. The apparatus according to claim 1, wherein the configuration signal includes a detection sample length and detection position information; the control signal includes the detection sample length and the detection position information; the instantaneous power detection module is used for detecting the instantaneous power of the detection signal at the detection position according to the control signal to obtain an instantaneous power sequence of the detection sample length.
6. The peak-to-average ratio detection apparatus according to claim 1,
the peak-to-average ratio detection device also comprises a data storage module; the data storage module is used for storing the average power in each reference statistical unit length and the instantaneous power at the target sequencing position.
7. The apparatus according to claim 6, further comprising a data multiplexing module; the input end of the data multiplexing module is respectively connected with the average power calculation module and the comparison sorting module; the output end of the data multiplexing module is connected with the data storage module; the data multiplexing module is used for receiving the average power output by the average power calculation module and the instantaneous power at the target sorting position output by the comparison sorting module, performing serial conversion on the average power and the instantaneous power, and outputting the serial converted power to the data storage module for storage.
8. The apparatus according to claim 1, wherein the comparing and sorting module comprises a comparator set, a sorting unit and a register set connected in sequence; the comparator group is used for comparing the instantaneous power with the maximum instantaneous power in the register group and generating a level signal according to the comparison result; the sorting unit is used for adjusting the position sequence among the instantaneous powers from small to large according to the magnitude relation of the level signals; the register set is used for latching the instantaneous power at the sorted target sorting position.
9. A peak-to-average ratio detection method comprises the following steps:
receiving a detection trigger signal and a configuration signal, wherein the configuration signal comprises a reference statistical unit length and a statistical frequency;
generating a control signal according to the detection trigger signal and the configuration signal;
detecting the instantaneous power of a detection signal according to the control signal;
counting the average power of the instantaneous power in each reference statistical unit length according to the reference statistical unit length;
sorting the instantaneous power in each reference statistical unit length according to the reference statistical unit length so as to count the instantaneous power at the target sorting position in the reference statistical unit length; and
and calculating the peak-to-average ratio of the detection signal according to the average power and the instantaneous power at the target sorting position.
10. A mobile communication device comprises a digital intermediate frequency processing module and a radio frequency analog circuit module; the output end of the digital intermediate frequency processing module is connected with the input end of the radio frequency analog circuit module; the mobile communication device further comprises the peak-to-average ratio detection apparatus according to any one of claims 1 to 8; and an instantaneous power detection module in the peak-to-average ratio detection device is connected with the digital intermediate frequency processing module.
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