CN107733533A - The detection method and device of a kind of CCDF - Google Patents
The detection method and device of a kind of CCDF Download PDFInfo
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- CN107733533A CN107733533A CN201610665903.0A CN201610665903A CN107733533A CN 107733533 A CN107733533 A CN 107733533A CN 201610665903 A CN201610665903 A CN 201610665903A CN 107733533 A CN107733533 A CN 107733533A
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- H—ELECTRICITY
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- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
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Abstract
The detection method and device of a kind of CCDF provided by the invention, vector summation, quadratic sum summation, modulus value and summation are carried out to multi-band signal according to selected detection pattern or multichannel selects a computing, to produce measured signal；The mean power and instantaneous power of the measured signal are calculated respectively；The mean power and the instantaneous power relatively and are filtered out into multiple data points that instantaneous power is more than mean power；Count the multiple data point and fall the accumulated probability in multiple power subregions；Draw the matched curve of the CCDF.The invention provides various dimensions CCDF detection patterns, can carry out statistical analysis to signal CCDF from multiple dimensions, avoid dependence of the test to frequency spectrograph and frequency spectrograph signal analysis bandwidth.
Description
Technical field
The present invention relates to the digital information processing system of moving communicating field and method, more particularly to a kind of complimentary cumulative point
The detection method and device of cloth function (CCDF, Complementary Cumulative Density Function).
Background technology
Peak-to-average force ratio (Peak to Average Power Ratio, PAPR) and CCDF reflect signal temporal envelope amplitude
Situation of change, it can be used for the parameter designing of power amplifier in GSM.As mobile communication base station transceiver is from arrowband
Strided forward to broadband, ultra wide band, from one-segment to two-band, even multiband transition, signal configured bandwidth is from original more than ten Mhz
Increase to hundreds of Mhz.The conventional Agilent of industry and Luo De Schwarz spectrum analyzers possess big wide-band analysis ability at present
Meter cost is very expensive, and this causes signal (configured bandwidth is more than 160Mhz) under ultra wideband configurations, PAPR and CCDF tests
It is limited to instrument and can not completes.Secondly, as mobile communication base station miniaturization technology develops, board for receiving and sending message and power amplification integrated
Design, this to test PAPR and CCDF from actual response power amplifier entry signal characteristic in base station antenna feeder mouth.Furthermore signal exists
Under double frequency or multiband configuration, mobile communication base station is not concerned only with each frequency band signals vector PAPR and CCDF when designing is special
Property, can also be changed according to power amplifier model signal PAPR and CCDF statistical dimension (such as：The scalar modulus value of each frequency band signals and/or flat
Side and), and traditional PAPR and CCDF instrument test methods can not make statistics to other dimension PAPR and CCDF.
The content of the invention
It is contemplated that at least solves one of technical problem present in prior art.Therefore, one object of the present invention
It is to propose a kind of detectable various dimensions multiband complementation Cumulative Distribution Function, a kind of detection side of CCDF
Method and device.
A kind of detection method of the CCDF provided according to embodiments of the present invention, including：
Vector summation, quadratic sum summation, modulus value and summation are carried out to multi-band signal according to selected detection pattern
Or multichannel selects a computing, to produce measured signal；
The mean power and instantaneous power of the measured signal are calculated respectively；
The mean power and the instantaneous power relatively and are filtered out into more numbers that instantaneous power is more than mean power
Strong point, and count the multiple data point and fall the accumulated probability in multiple power subregions, to draw the complimentary cumulative point
The matched curve of cloth function.
Above-mentioned detection method, wherein,
Described the step of carrying out vector summation operation to multi-band signal, includes：The multi-band signal of input is entered
Row NCO frequency spectrum shifts, and mixing combining is carried out to the signal after frequency spectrum shift, to produce the measured signal；
Described the step of carrying out quadratic sum summation operation to multi-band signal, includes：The multi-band signal of input is entered
Row square operation, and square operation result is summed, to produce the measured signal；
Described the step of carrying out modulus value and summation operation to multi-band signal, includes:The multi-band signal of input is entered
Row modulus value computing, and the modulus value operation result is summed, to produce the measured signal；
Described the step of selecting a computing to multi-band signal progress multichannel, includes：Selected from the multi-band signal of input
Monophonic signal all the way, to produce the measured signal.
Above-mentioned detection method, wherein, calculate the mean power and instantaneous power of the measured signal respectively the step of it
Afterwards, the detection method also includes：
Calculate the difference of the instantaneous power and the mean power corresponding to the multiple data point difference；
The peak value number fallen to the difference in the corresponding power subregion counts, and according to counting
Peak-to-average force ratio corresponding to the peak value number calculating.
Above-mentioned detection method, wherein, it is described calculate the measured signal respectively mean power and instantaneous power the step of
Including：
It is integer part N and fractional part p ' by the Power Decomposition of input；
According to formula P=10*lg (2) * log2(p)=10*lg (2) * N+10*lg (2) * log2(p') input is calculated
Power logarithm value, wherein the integer part N is multiplied into 10*lg (2) * N that fixed gain obtains and to the fractional part
P ' enters 10*lg (2) * log that row decoding tables look-up to obtain2(p') addition summation is carried out, to complete pair to the power of the input
Number conversion.
Above-mentioned detection method, wherein, the step of Power Decomposition by input is integer part N and fractional part p ', wraps
Include：
It is high bit portion and low bit portion by the power cut position of the input；
Average packet is carried out to the high bit portion, to produce multiple subgroups, inquired about in truth table is decoded each
It is worth corresponding to the subgroup, to calculate the integer part N；
The fractional part p ' is calculated according to the integer part N and the low bit portion.
Above-mentioned detection method, wherein, the computational methods of the peak-to-average force ratio include：
The peak value number counted is stored in memory cell, the depth of the memory cell is h, bit wide w, described
The peak value number stored in memory cell is mi(wherein i ∈ [0, h-1]), i add one and fixed value (2 successively since 0w-
1) * 0.01% compares, and records and meet mi<=(2w- 1) * 0.01% minimum i values, the address corresponding to the i are to count
The peak-to-average force ratio of signal.
The present invention also provides a kind of detection means of complementary Cumulative Distribution Function, including：
Detection pattern selecting module, vector summation is carried out to multi-band signal for the detection pattern according to selection, put down
Side and summation, modulus value and summation or multichannel select a computing, to produce measured signal；
Power computation module, for calculating the mean power and instantaneous power of the measured signal respectively；
Accumulated probability statistical module, for relatively and the mean power and the instantaneous power to be filtered out into instantaneous power
More than multiple data points of mean power, and count the multiple data point and fall the accumulated probability in multiple power subregions,
To draw the matched curve of the CCDF.
Above-mentioned detection device, wherein, the detection pattern selecting module also includes：
Multiband vector detection module, for carrying out NCO frequency spectrum shifts to the multi-band signal of input, and to frequency
Signal after spectrum is moved carries out mixing combining, to produce the measured signal；
Multiband quadratic sum detection module, for carrying out square operation to the multi-band signal of input, and to square
Operation result is summed, to produce the measured signal；
Multiband modulus value and detection module, for carrying out modulus value computing to the multi-band signal of input, and to described
Modulus value operation result is summed, to produce the measured signal；
One-segment detection module, for selecting monophonic signal all the way from the multi-band signal of input, to produce
State measured signal.
Above-mentioned detection device, wherein, the detection means also includes：
Peak-to-average force ratio computing module, for calculating the mean power of the measured signal respectively in the power computation module
After instantaneous power, the difference of the instantaneous power and the mean power corresponding to the multiple data point difference is calculated,
The peak value number fallen to the difference in the corresponding power subregion counts, and according to the peak value counted
Peak-to-average force ratio corresponding to number calculating.
Above-mentioned detection device, wherein, power computation module also includes：
Data decomposing module, for by the Power Decomposition of input into integer part and fractional part；
Logarithm operation module, for according to formula
P=10*lg (2) * log2(p)=10*lg (2) * N+10*lg (2) * log2(p') power of the input is calculated
Logarithm value, wherein the integer part N is multiplied into 10*lg (2) the * N and translate the fractional part p ' that fixed gain obtains
Code tables look-up obtained 10*lg (2) * log2(p') addition summation is carried out, to complete the Logarithm conversion to the power of the input.
Above-mentioned detection device, wherein, the data decomposing module also includes：
Pre- cut position module, for being high bit portion and low bit portion by the power cut position of the input；
Grouping module, average packet is carried out to the high bit portion, to produce multiple subgroups, in truth table is decoded
It is worth corresponding to each subgroup of inquiry, to calculate the integer part N；
Fractional part computing module is described small for being calculated according to the integer part N and the low bit portion
Number part p '.
Above-mentioned detection device, wherein, the peak-to-average force ratio computing module also includes：
Memory cell, for the peak value number counted to be stored in into memory cell, the depth of the memory cell is
H, bit wide w, the peak value number stored in the memory cell is mi(wherein i ∈ [0, h-1]), i is since 0, successively
Add one and fixed value (2w- 1) * 0.01% compares, and records and meet mi<=(2w- 1) * 0.01% minimum i values, the i institutes are right
The address answered is the peak-to-average force ratio of statistical signal.
The detection method and device of a kind of above-mentioned complementary Cumulative Distribution Function, one kind in four kinds of detection patterns is selected, then
The mean power and instantaneous power of the multiband I/Q signal inputted under the detection pattern of selection are calculated, then passes through the average work(
Rate and the instantaneous power, calculate the complementary Cumulative Distribution Function of the multiband I/Q signal, and the detection method can be selected
Select four kinds of different detection patterns and detect the multiband I/Q signal, the complementation for reaching multiband various dimensions detection input signal is tired out
Distribution function purpose is counted, while avoids dependence of the test to frequency spectrograph and frequency spectrograph signal analysis bandwidth.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is a kind of flow chart of CCDF detection method in first embodiment of the invention；
Fig. 2 is a kind of CCDF detection means of present invention position view in mobile communication system；
Fig. 3 is a kind of flow chart of CCDF detection method in second embodiment of the invention；
Fig. 4 is that four kinds of detection patterns are realized in a kind of CCDF detection means in first embodiment of the invention
Structural representation；
Fig. 5 is that Logarithm conversion realizes signal in a kind of CCDF detection means in first embodiment of the invention
Figure；
Fig. 6 is a kind of CCDF structure of the detecting device schematic diagram in first embodiment of the invention；
Fig. 7 is a kind of CCDF structure of the detecting device schematic diagram in second embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, term " longitudinal direction ", " transverse direction ", " on ", " under ", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " top ", " bottom " or position relationship are based on orientation shown in the drawings or position relationship, are only
For the ease of the description present invention rather than require that the present invention must be therefore it is not intended that right with specific azimuth configuration and operation
The limitation of the present invention.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Apparatus of the present invention are described in detail with reference to the accompanying drawings and examples.
It should be noted that in clock of the embodiment of the present invention, CCDF refers to signal peak power in a certain time interval and put down
Equal power ratio, forward power exceed the probability of given threshold value, industry generally using index at 0.01% on CCDF curves as
Tested signal PAPR test values.
To solve the above problems, the present invention is achieved by following technical solution：
Embodiment 1
Referring to Fig. 1, it show a kind of flow of CCDF detection method in first embodiment of the invention
Figure, step include S01 to step S03.
Step S01, vector summation, quadratic sum summation, mould are carried out to multi-band signal according to selected detection pattern
Value and summation or multichannel select a computing, to produce measured signal.
Specifically, the corresponding four kinds of computings of above-mentioned four kinds of detection patterns, wherein carrying out vector summation fortune to multi-band signal
The step of calculation, includes：NCO frequency spectrum shifts are carried out to the multiband I/Q signal of input, and the signal after frequency spectrum shift is mixed
Combining, to produce the measured signal；
The step of carrying out quadratic sum summation operation to multi-band signal includes：Multiband I/Q signal progress square to input
Computing, and square operation result is summed, to produce measured signal；
The step of carrying out modulus value and summation operation to multi-band signal includes:Mould is carried out to the multi-band signal of input
It is worth computing, and modulus value operation result is summed, produces measured signal；
Carrying out the step of multichannel selects a computing to multi-band signal includes：Selected all the way from the multi-band signal of input
Monophonic signal, to produce measured signal.
Step S02, the mean power and instantaneous power of the measured signal are calculated respectively.
Step S03, the mean power and the instantaneous power relatively and are filtered out instantaneous power and are more than mean power
Multiple data points, and count the multiple data point and fall the accumulated probability in multiple power subregions, with draw it is described mutually
Mend the matched curve of cumulative distribution function.
Referring to Fig. 2, show position in mobile communication system for a kind of CCDF detection means of the present invention
It is intended to；
Apparatus of the present invention are usually located at the end of digital intermediate frequency link in mobile communication base station, to realize to entering power amplifier
Signal testing function.In the present embodiment, multinode input data can also be screened according to monitoring position configuration information
Adaptation, to accomplish to support multiple spot detection function；
The present embodiment is by one kind in four kinds of detection patterns of selection, then calculates the multifrequency inputted under the detection pattern of selection
The mean power and instantaneous power of segment signal, then by the mean power and the instantaneous power, calculate the multifrequency
The complementary Cumulative Distribution Function of segment signal, the detection method can select four kinds of different detection patterns to detect the multiband
I/Q signal, reaches the complementary Cumulative Distribution Function purpose of multiband various dimensions detection input signal, while avoids test to frequency
The dependence of spectrometer and frequency spectrograph signal analysis bandwidth.
Embodiment 2
Referring to Fig. 3, it show a kind of flow of CCDF detection method in second embodiment of the invention
Figure, step include S10 to step S16.
Step S10, vector summation, quadratic sum summation, mould are carried out to multi-band signal according to selected detection pattern
Value and summation or multichannel select a computing, to produce measured signal.
Specifically, in the present embodiment, there is provided four kinds of detection patterns, to realize the multiband to the measured signal of input
And various dimensions detection, and before CCDF detections, can also be defeated to multinode according to monitoring position configuration information in the present embodiment clock
Enter data and carry out screening adaptation, to accomplish to support multiple spot detection function.
Referring to Fig. 4, it show in first embodiment of the invention four kinds in a kind of CCDF detection means
Detection pattern realizes structural representation；
Pattern one (0x0) is multiband vector pattern.The pattern first carries out NCO to the multiband I/Q data of input
(Numerically controlled oscillator, NCO, digital controlled oscillator) frequency spectrum shift, then to the letter after frequency spectrum shift
Number mixing combining.Assuming that vector signal is characterized asI.e. the pattern is realized to multi-band signal vectorPAPR and CCDF detection.
Pattern two (0x1) is multiband quadratic sum pattern.The pattern first carries out a square fortune to the multiband I/Q data of input
Calculate, then square operation result is summed, i.e., the pattern is realized to multi-band signal quadratic sum
PAPR and CCDF detection.
Pattern three (0x2) is multiband modulus value and pattern.The pattern first carries out modulus value fortune to the multiband I/Q data of input
Calculate, then to modulus value operation result sum, i.e., the pattern realize to multi-band signal modulus value with's
PAPR and CCDF detections.
Pattern four (0x3) is one-segment signal peak-to-average ratio detection pattern.The pattern carries out N to the multiband I/Q data of input
One is selected, then monitored signal carries out PAPR and CCDF detections.
Step S11, the mean power and instantaneous power of the measured signal are calculated respectively；
Step S12, calculate the difference of the instantaneous power and the mean power corresponding to the multiple data point difference；
Step S13, mean power and instantaneous power relatively and are filtered out into more numbers that instantaneous power is more than mean power
Strong point；
Step S14, the peak value number fallen to the difference in the corresponding power subregion count；
Step S15, count multiple data points and fall the accumulated probability in multiple power subregions；
Step S16, draw CCDF matched curve；
Step S17, the peak-to-average force ratio according to corresponding to calculating the peak value number counted.
For the sample data sequence X=x (n), n=1,2 ... of suspect signal, N, wherein N are the number of sampled data.
Assuming that the instantaneous power of data sequence is：P=p (n), n=1,2 ..., N, and the mean power of the data sequence is designated as Pavg, then
The difference for having instantaneous power and mean power is：
Δ P=p (n)-PavgN=1,2,3 ..., N (formula 1)
Maximum in formula 1 is：
ΔPmax=max (p (n))-PavgN=1,2,3 ..., N (formula 2)
If by formula 2 by Δ PmaxRegion [0, the Δ P of compositionmax] be divided into by the subregion of m complementary overhangs
Δ P falls the cumulative probability of the m sub-regions in formula 3 in statistics formula 1, and the cumulative probability is depicted as into curve, should
Curve is CCDF curves.
And detected for PAPR, will statistics by falling counting in each power subregion peak number
The peak value number gone out is converted into corresponding peak-to-average force ratio, can complete the PRPR detections for multiband various dimensions.
Specifically, in embodiments of the present invention, can be by being carried out to the measured signal of input for above-mentioned steps S11
Logarithm operation, it is unified to dB units, to realize the comparison of instantaneous value and average value to measured signal.To letter to be measured in the present embodiment
Number carry out logarithm operation method may refer to following step S110-S111.
Step S110, it is integer part N and fractional part p ' by the Power Decomposition of input；
Step S111, according to formula P=10*lg (2) * log2(p)=10*lg (2) * N+10*lg (2) * log2(p') calculate
The logarithm value of the power of the input, wherein the integer part N is multiplied into 10*lg (2) * N that fixed gain obtains and to described
Fractional part p ' enters 10*lg (2) * log that row decoding tables look-up to obtain2(p') addition summation is carried out, to complete to the input
The Logarithm conversion of power.
Specifically, integer is carried out to input signal first and decimal decomposes, according to Logarithmic calculation relation：
P=10*lg (p)=10*lg (2) * log2(p) (formula 4)
And input power can be written as p=2N* p', wherein 1≤p'<2 (formulas 5)
P=10*lg (2) * log2(p)=10*lg (2) * N+10*lg (2) * log2(p') (formula 6)
Wherein N is integer part, and p' is fractional part.Multiply fixed gain to integer part and obtain 10*lg (2) * N, it is small
Tabled look-up to obtain 10*lg (2) * log with p' in number part2(p'), then both are added summation and complete Logarithm conversion.
Logarithm conversion module realizes structure as shown in figure 5, can be right according to dynamic characterization scope in practical engineering application
The pre- cut position of input signal, then logarithm operation is carried out to the signal after cut position.Although bringing dynamic range to lose the pre- cut position of signal,
But pre- cut position can reduce operand and improve operation efficiency.
Referring to Fig. 5, logarithm in a kind of CCDF detection means is shown in first embodiment of the invention
Schematic diagram is realized in conversion.In the present embodiment, can be high bit portion and low bit portion by the power cut position of input, to height
Bit portion carries out average packet, to produce multiple subgroups, is inquired about in truth table is decoded corresponding to each subgroup
Value, to calculate the integer part N, fractional part p ' is calculated further according to integer part N and low bit portion.
Specifically, it is assumed that input signal is p ([30:0]) bit wide is 31bit unsigned numbers, and above-mentioned Logarithm conversion can pass through
Following step (1)-(9) are realized：
Step (1), cut low 10bit (i.e. the high 21bit of input signal) in advance to the input signal p, the signal is designated as p1,
Again to the p1Carry out logarithm operation；
Step (2), in order to further improve operation efficiency, to the p1It is grouped according to every 7bit, is designated as p respectively11、p12、
p13, i.e., described p11For [the 30 of the input signal p:24], the p12For [the 23 of the input signal p:17], it is and described
p13For [the 16 of the input signal p:10]；
Step (3), according to truth table 1 respectively to the p11、p12、p13Table lookup operations are carried out, output result is respectively n1、
n2、n3；
The power conversion module of table 1 decodes truth table
| Input signal | n |
| 000_0000 | 0 |
| 000_0001 | 1 |
| 000_001x | 2 |
| 000_01xx | 3 |
| 000_1xxx | 4 |
| 001_xxxx | 5 |
| 01x_xxxx | 6 |
| 1xx_xxxx | 7 |
Step (4), respectively to the p11、p12、p13It is respectively f to carry out step-by-step logic or computing, output result1、f2、f3；
Step (5), according to truth table 2, to the output result n of step 3 and step 41、n2、n3And f1、f2、f3Again
Table lookup operations obtain final integer-bit N；
The power conversion module of table 2 decodes truth table
Step (6), fractional part p' is calculated according to the output of the step 5 integer-bit N.Assuming that N=14, the fractional part
It is p'=p [13 to divide relation between p' and the input signal p:7].If it should be noted that N<7 need the low level in p' to mend
0 extends to 7bit；
Step (7), the integer-bit N exported to step 5 multiply fixed gain 10*lg (2)；
Step (8), the decimal p table lookup operations exported to step 6, table content are as shown in Equation 7；
Step (9), step 7 and step 8 output result are summed, that is, complete the Logarithm conversion fortune to the input signal p
Calculate.
Further, mean power relatively and is filtered out into instantaneous power more than flat with instantaneous power in above-mentioned steps S13
In multiple data points of equal power, the instantaneous value and average value of input are compared, and relational expression exports wink according to formula 8
Duration and average value difference are designated as Δ P.
The Δ P value number statistical functions to step S13 outputs are completed wherein in above-mentioned steps S14, especially by one
Two Postponement modules, an adder unit, ram memory cell realize that the ram memory cell is used to store peak value
Number, the depth of memory cell are h, bit wide w, and the peak value number stored in the memory cell is mi(wherein i ∈ [0,
H-1]), i adds one and fixed value (2 successively since 0w- 1) * 0.01% compares, and records and meet mi<=(2w- 1) * 0.01%
Minimum i values, the address corresponding to i is the peak-to-average force ratio of statistical signal here.
Such as：
If memory cell is RAM, it is assumed that the size of the RAM is that (i.e. address ram depth is 256 to 256*18, and bit wide is
18bit), and the precision of prime logarithm operation unit is 0.1dB, then the address ram depth 256 can characterize 0-25.5dB's
Dynamic range, and it is that 18bit can count 2 that the RAM bit is wide18Individual sample.
Again for example：
Step 1, t, the peak number statistical module input 78 (characterizing 7.8dB), then it is corresponding to read the RAM
Data in 78 address spaces, are designated as m；
Step 2, the data m is carried out from add-one operation, i.e. m'=m+1；
Step 3, m' is updated and preserved into 78 addresses of the RAM；
Step 4, minor peaks number statistics are completed, and repeat step one to step 3 operates after signal update to be entered.
In above-mentioned steps S15, complete to sum to the preceding k of the peak value Number Sequence x (i) and calculate distribution probability
And meeting relational expression 9, final η (k) is intended to 1.
The detection method of the present embodiment can select four kinds of different detection patterns to detect the multiband I/Q signal, reach
Multiband various dimensions detect the complementary Cumulative Distribution Function purpose of input signal, while avoid test to frequency spectrograph and frequency spectrum
The dependence of instrument signal analysis bandwidth.Further, the detection method of the present embodiment can also carry out multiband various dimensions to PAPR
Counting statistics and detection.
Further, can also be according to trigger signal and configuration information from external circuit (such as CPU) in embodiment
(such as signal frame originating point information, effective detection mark, detection sample length) produces the control signal for the detection means.Its
Middle control signal is respectively used to selection of the control data routing module to input signal, detection pattern selecting module to detection pattern
Calculating, the calculating of Logarithm conversion module, the data storage of memory cell and reading to power of selection, power computation module.
Specifically, the embodiment of the present invention can be realized based on programmable gate array (FPGA, Field Programmable
Gate Array) detection that the PAPR and CCDF various dimensions of multiband various dimensions ultra-broadband signal are counted realized of logical construction
Method and apparatus.Compared to conventional instrument testing scheme, this method and device have the characteristics that：
1) the perfect maintainability and testability function of mobile communication base station, the letter during operation of mobile communication base station can be monitored in real time
Number PRA and CCDF characteristics, to reach the purpose of monitoring baseband signal characteristic；
2) PAR parameter extracting methods when simplifying power amplifier design, PAPR and the CCDF spy into power amplifier signal can truly be reflected
Property；
3) various dimensions PAPR and CCDF detection pattern is provided, signal PAPR and CCDF can be united from multiple dimensions
Meter analysis, avoid dependence of the peak-to-average force ratio test to frequency spectrograph and frequency spectrograph signal analysis bandwidth.
Embodiment 3
Referring to Fig. 6, a kind of detection means of CCDF of first embodiment of the invention offer is provided,
Including,
Detection pattern selecting module 1, vector summation is carried out to multi-band signal for the detection pattern according to selection, put down
Side and summation, modulus value and summation or multichannel select a computing, to produce measured signal；
Power computation module 2, for calculating the mean power and instantaneous power of the measured signal respectively；
Accumulated probability statistical module 3, for relatively and the mean power and the instantaneous power to be filtered out into instantaneous work(
Rate is more than multiple data points of mean power, and count the multiple data point fall it is accumulative general in multiple power subregions
Rate, to draw the matched curve of the CCDF.
Embodiment 4
Referring to Fig. 7, the embodiment 4 and the embodiment 3 are more or less the same, its difference is, in the embodiment 4,
The detection pattern selecting module also includes：
Multiband vector detection module 11, for carrying out NCO frequency spectrum shifts to the multi-band signal of input, and it is right
Signal after frequency spectrum shift carries out mixing combining, to produce the measured signal；
Multiband quadratic sum detection module 12, for carrying out square operation to the multi-band signal of input, and to flat
Square operation result summation, to produce the measured signal；
Multiband modulus value and detection module 13, for carrying out modulus value computing to the multi-band signal of input, and to institute
The summation of modulus value operation result is stated, to produce the measured signal；
One-segment detection module 14, for selecting monophonic signal all the way from the multi-band signal of input, to produce
The measured signal.
The detection means also includes：
Peak-to-average force ratio computing module 4, for calculating the average work(of the measured signal respectively in the power computation module
After rate and instantaneous power, the difference of the instantaneous power and the mean power corresponding to the multiple data point difference is calculated
Value, the peak value number fallen to the difference in the corresponding power subregion count, and according to counting
Peak-to-average force ratio corresponding to the calculating of peak value number.
The power computation module 2 also includes：
Data decomposing module 21, for by the Power Decomposition of input into integer part and fractional part；
Logarithm operation module 22, for according to formula：
P=10*lg (2) * log2(p)=10*lg (2) * N+10*lg (2) * log2(p') power of the input is calculated
Logarithm value, wherein the integer part N is multiplied into 10*lg (2) the * N and translate the fractional part p ' that fixed gain obtains
Code tables look-up obtained 10*lg (2) * log2(p') addition summation is carried out, to complete the Logarithm conversion to the power of the input.
The data decomposing module 21 also includes：
Pre- cut position module 210, for being high bit portion and low bit portion by the power cut position of the input；
Grouping module 211, average packet is carried out to the high bit portion, to produce multiple subgroups, in decoding true value
Inquire about in table and be worth corresponding to each subgroup, to calculate the integer part N；
Fractional part computing module 212, described in being calculated according to the integer part N and the low bit portion
Fractional part p '.
The peak-to-average force ratio computing module 4 also includes：
Memory cell 41, for the peak value number counted to be stored in into memory cell, the depth of the memory cell
For h, bit wide w, the peak value number stored in the memory cell is mi(wherein i ∈ [0, h-1]), i since 0, according to
Secondary plus one and fixed value (2w- 1) * 0.01% compares, and records and meet mi<=(2w- 1) * 0.01% minimum i values, the i institutes
Corresponding address is the peak-to-average force ratio of statistical signal.
With reference to following description and accompanying drawing, it will be clear that these and other aspects of embodiments of the invention.In these descriptions
In accompanying drawing, some particular implementations in embodiments of the invention are specifically disclosed, to represent to implement the implementation of the present invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.On the contrary, the present invention
Embodiment includes all changes, modification and the equivalent fallen into the range of the spirit and intension of attached claims.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress used with reference to these instruction execution systems, device or equipment
Put.
The more specifically example (non-exhaustive list) of computer-readable medium includes following：Connected up with one or more
Electrical connection section (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium, which can even is that, to print the paper of described program thereon or other are suitable
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, software that multiple steps or method can be performed in memory and by suitable instruction execution system with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, have suitable combinational logic gate circuit application specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Necessarily refer to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (12)
1. a kind of detection method of CCDF, it is characterised in that the detection method includes：
Vector summation, quadratic sum summation, modulus value and summation or more are carried out to multi-band signal according to selected detection pattern
Lu Xuanyi computings, to produce measured signal；
The mean power and instantaneous power of the measured signal are calculated respectively；
The mean power and the instantaneous power relatively and are filtered out into multiple data points that instantaneous power is more than mean power,
And count the multiple data point and fall the accumulated probability in multiple power subregions, to draw the CCDF
Matched curve.
2. detection method according to claim 1, it is characterised in that：
Described the step of carrying out vector summation operation to multi-band signal, includes：The multi-band signal of input is carried out
NCO frequency spectrum shifts, and mixing combining is carried out to the signal after frequency spectrum shift, to produce the measured signal；
Described the step of carrying out quadratic sum summation operation to multi-band signal, includes：The multi-band signal of input is put down
Square computing, and square operation result is summed, to produce the measured signal；
Described the step of carrying out modulus value and summation operation to multi-band signal, includes:Mould is carried out to the multi-band signal of input
It is worth computing, and the modulus value operation result is summed, produces the measured signal；
Described the step of selecting a computing to multi-band signal progress multichannel, includes：Selected all the way from the multi-band signal of input
Monophonic signal, to produce the measured signal.
3. detection method according to claim 1 or 2, it is characterised in that calculating being averaged for the measured signal respectively
After the step of power and instantaneous power, the detection method also includes：
Calculate the difference of the instantaneous power and the mean power corresponding to the multiple data point difference；
The peak value number fallen to the difference in the corresponding power subregion counts, and according to counting
Peak-to-average force ratio corresponding to the calculating of peak value number.
4. detection method according to claim 1 or 2, it is characterised in that described to calculate the flat of the measured signal respectively
The step of equal power and instantaneous power, includes：
It is integer part N and fractional part p ' by the Power Decomposition of input；
According to formula P=10*lg (2) * log2(p)=10*lg (2) * N+10*lg (2) * log2(p') work(of the input is calculated
The logarithm value of rate, wherein the integer part N is multiplied into 10*lg (2) the * N and enter to the fractional part p ' that fixed gain obtains
Row decoding tables look-up obtained 10*lg (2) * log2(p') addition summation is carried out, is turned with the logarithm completed to the power of the input
Change.
5. detection method according to claim 4, it is characterised in that the Power Decomposition by input is integer part N
Include with the step of fractional part p '：
It is high bit portion and low bit portion by the power cut position of the input；
Average packet is carried out to the high bit portion, to produce multiple subgroups, inquired about in truth table is decoded each described
It is worth corresponding to subgroup, to calculate the integer part N；
The fractional part p ' is calculated according to the integer part N and the low bit portion.
6. detection method according to claim 3, it is characterised in that the computational methods of the peak-to-average force ratio include：
The peak value number counted is stored in memory cell, the depth of the memory cell is h, bit wide w, the storage
The peak value number stored in unit is mi(wherein i ∈ [0, h-1]), i add one and fixed value (2 successively since 0w-1)*
0.01% compares, and records and meet mi<=(2w- 1) * 0.01% minimum i values, the address corresponding to the i is statistical signal
Peak-to-average force ratio.
A kind of 7. detection means of complementary Cumulative Distribution Function, it is characterised in that including：
Detection pattern selecting module, vector summation, quadratic sum are carried out to multi-band signal for the detection pattern according to selection
Summation, modulus value and summation or multichannel select a computing, to produce measured signal；
Power computation module, for calculating the mean power and instantaneous power of the measured signal respectively；
Accumulated probability statistical module, for relatively and filtering out instantaneous power and being more than the mean power with the instantaneous power
Multiple data points of mean power, and count the multiple data point and fall the accumulated probability in multiple power subregions, to paint
Make the matched curve of the CCDF.
8. detection means according to claim 7, it is characterised in that the detection pattern selecting module also includes：
Multiband vector detection module, for carrying out NCO frequency spectrum shifts to the multi-band signal of input, and frequency spectrum is removed
Signal after shifting carries out mixing combining, to produce the measured signal；
Multiband quadratic sum detection module, for carrying out square operation to the multi-band signal of input, and to square operation
As a result sum, to produce the measured signal；
Multiband modulus value and detection module, for carrying out modulus value computing to the multi-band signal of input, and to the modulus value
Operation result is summed, to produce the measured signal；
One-segment detection module, for selecting monophonic signal all the way from the multi-band signal of input, to be treated described in generation
Survey signal.
9. the detection means according to claim 7 or 8, it is characterised in that the detection means also includes：
Peak-to-average force ratio computing module, for calculating mean power and the wink of the measured signal respectively in the power computation module
When power after, calculate the multiple data point respectively corresponding to the difference of the instantaneous power and the mean power, to institute
The peak value number that difference falls in the corresponding power subregion is stated to be counted, and according to the peak value number counted
Peak-to-average force ratio corresponding to calculating.
10. the detection means according to claim 7 or 8, it is characterised in that power computation module also includes：
Data decomposing module, for by the Power Decomposition of input into integer part and fractional part；
Logarithm operation module, for according to formula：
P=10*lg (2) * log2(p)=10*lg (2) * N+10*lg (2) * log2(p') logarithm of the power of the input is calculated
Value, looked into wherein multiplying 10*lg (2) * N that fixed gain obtains and entering row decoding to the fractional part p ' the integer part N
10*lg (2) * log that table obtains2(p') addition summation is carried out, to complete the Logarithm conversion to the power of the input.
11. detection means according to claim 10, it is characterised in that the data decomposing module also includes：
Pre- cut position module, for being high bit portion and low bit portion by the power cut position of the input；
Grouping module, average packet is carried out to the high bit portion, to produce multiple subgroups, inquired about in truth table is decoded
It is worth corresponding to each subgroup, to calculate the integer part N；
Fractional part computing module, for the fractional part to be calculated according to the integer part N and the low bit portion
Divide p '.
12. detection means according to claim 8, it is characterised in that the peak-to-average force ratio computing module also includes：
Memory cell, for the peak value number counted to be stored in into memory cell, the depth of the memory cell is h, position
A width of w, the peak value number stored in the memory cell is mi(wherein i ∈ [0, h-1]), i add one successively since 0
With fixed value (2w- 1) * 0.01% compares, and records and meet mi<=(2w- 1) * 0.01% minimum i values, corresponding to the i
Address is the peak-to-average force ratio of statistical signal.
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| CN101854219A (en) * | 2010-06-18 | 2010-10-06 | 上海交通大学 | Stochastic resonance based energy detection device and detection method thereof |
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| CN1398077A (en) * | 2001-07-14 | 2003-02-19 | 深圳市中兴通讯股份有限公司 | Method for controlling overload of reverse power |
| US20060121946A1 (en) * | 2001-11-06 | 2006-06-08 | Walton Jay R | Multiple-access multiple-input multiple-output (MIMO) communication system |
| CN101753500A (en) * | 2008-12-18 | 2010-06-23 | 中国电子科技集团公司第五十研究所 | Method and system for efficiently restraining large peak-to-average power ratio (PAPR) of OFDM system based on companding |
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