CN104205762B - Phase error detection device, and method for detecting phase error - Google Patents
Phase error detection device, and method for detecting phase error Download PDFInfo
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- CN104205762B CN104205762B CN201280071522.XA CN201280071522A CN104205762B CN 104205762 B CN104205762 B CN 104205762B CN 201280071522 A CN201280071522 A CN 201280071522A CN 104205762 B CN104205762 B CN 104205762B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2657—Carrier synchronisation
- H04L27/266—Fine or fractional frequency offset determination and synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2673—Details of algorithms characterised by synchronisation parameters
- H04L27/2675—Pilot or known symbols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2668—Details of algorithms
- H04L27/2681—Details of algorithms characterised by constraints
- H04L27/2686—Range of frequencies or delays tested
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2691—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation involving interference determination or cancellation
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
A phase error detector (23) is provided with: an error component detector (31) for detecting an error component signal (Pe) that represents a phase error in the baseband receiving signal; a signal classifier(51) for classifying the error component signal (Pe) as one of any among a plurality of phase ranges for demarcating the detection range of a phase error; a repetition controller (52) for determining whether the error component signal (Pe) in at least one specific phase range among a plurality of phase ranges has been classified only a designated number of times; an update processor (53) for reducing the detection range when the error component signal (Pe) in the specific phase range has been determined to be classified only a designated number of times; and a signal output unit (43) for setting a value within the specific phase range to be a steady-state value of a phase error when the specific phase range has been determined to satisfy a prescribed pull-in condition.
Description
Technical field
The present invention relates to detect the base band caused due to the receiving the carrier frequency error in signal of carrier frequency band
(baseband) technology of the phase error of signal is received, more particularly to the phase place is detected according to the baseband receiving signals in time domain
The technology of error.
Background technology
In general, radio receiver carries out quadrature demodulation to the reception signal of carrier frequency band (reference carrier frequency)
Generate baseband receiving signals.(" frequency mistake is also referred to as below when there is error in the carrier frequency in the reception signal of carrier frequency band
Difference ".) when, phase error is produced in baseband receiving signals due to the frequency error.For this purpose, radio receiver has inspection
The function of surveying this phase error and which is compensated.
Especially, with OFDM (OFDM：Orthogonal Frequency Division
Multiplexing) there is frequency error in receiving signal in the OFDM of the carrier frequency band that mode is transmitted and the frequency error is not mended
In the case of repaying, even if carrying out fast fourier transform (FFT to base band OFDM signal：Fast Fourier Transform) come
Frequency-region signal is generated, the quality of the frequency-region signal also occurs deterioration.Detection OFDM receives the frequency error of signal and which is carried out
The technology of compensation is for example in No. 4584756 description of Japanese Patent Publication No. (patent documentation 1), No. 3793534 explanations of Japanese Patent Publication No.
It is disclosed in book (patent documentation 2) and Japanese Unexamined Patent Publication 2006-211441 publications (patent documentation 3).
Following technology is disclosed in patent documentation 1,2：Frequency-region signal after being performed according to FFT, carries out having used these
The frequency error detection of pilot signal and/or control signal included in frequency-region signal and the correction of the frequency error.Patent
Pilot signal detection device disclosed in document 1 can pass through the power of the symbols for detecting multiple pilot signal configuration modes
The pattern of maximum is obtained with, the frequency error in units of subcarrier interval is detected.On the other hand, 2 institute of patent documentation
Disclosed OFDM transmission/receptidevice device is by AC (the Auxiliary Channel in the frequency domain after just Fourier transform：Auxiliary
Channel) signal and/or TMCC (Transmission and Multiplexing Configuration Control：Transmission and
Multiplexing structure is controlled) absolute value of signal carries out square operation and carrys out signal calculated power, and according to the signal power with represent secondary
Correlated results between the positional information of carrier position detected frequency error (frequency departure).But, 1,2 institute of patent documentation
Disclosed technology detects frequency error in units of subcarrier, therefore the accuracy of detection of frequency error may produce the limit.
In this regard, the inspection of the baseband signal with the time domain before being performed according to FFT of the OFDM demodulation device disclosed in patent documentation 3
The carrier regeneration portion of measured frequency error, detects the method phase of frequency error with the use frequency-region signal disclosed in patent documentation 1,2
Than with being generally possible to detect the feature of frequency error at short notice.
Specifically, the carrier regeneration portion of patent documentation 3 has：Delay portion, which makes baseband signal postpone and significant character
The period corresponding time；Correlation operation portion, the output of its computing delay portion and the dependency of the baseband signal；Normalization
Portion, its output to the correlation operation portion are normalized；Interval integral portion, its output to the normalization portion carry out interval
Integration carrys out the skew (frequency error) of detected carrier frequency；Reliability decision portion, its work(according to the output in the interval integral portion
Rate value, the reliability of the carrier frequency shift that judgement is detected；And loop filtering part, which is sentenced according to the reliability decision portion
Determine output control quadrature demodulation frequency of oscillation.In the OFDM demodulation device, in the reliability relative to carrier frequency shift
In the case of height, loop gain increase, therefore, it is possible to shorten pull-in time (from reception sart point in time to carrier frequency
The fringe time of synchronous setup time point).Therefore, it is possible to shorten pull-in time corresponding with transmission path environment.
Prior art literature
Patent documentation
【Patent documentation 1】No. 4584756 description of Japanese Patent Publication No. (the 0039th～0046 section, Fig. 5 and Fig. 6 etc.)
【Patent documentation 2】No. 3793534 description of Japanese Patent Publication No. (the 0035th section)
【Patent documentation 3】Japanese Unexamined Patent Publication 2006-211441 publications (the 0042nd, 0055～0056 section and Fig. 2 etc.)
The content of the invention
Invent problem to be solved
But, the shortening effect of the pull-in time disclosed in patent documentation 3 is depending on by the reference of reliability decision portion
Interval integral result performance number precision, and also depending on the judgement speed in reliability decision portion.Therefore, in interval product
In the case that the operational precision or judgement speed of branch are relatively low, it is impossible to sufficiently shortened effect.For example, with weak electric field ring
Border is, under the reception environment severe all the time of representative, to be judged to that reliability is relatively low all the time by reliability decision portion, consequently, it is possible to
Can not obtain shortening the effect of pull-in time.
In view of the foregoing, even if it is an object of the invention to provide a kind of under severe reception environment, it is also possible to contract
The synchronous of short carrier frequency is set up the required time, and the phase error that the accuracy of detection of phase error is reduced can be suppressed to examine
Survey device, phase error detecting method and reception device.
Means for solving the problems
The phase error detecting apparatus of the 1st mode of the present invention are characterised by having：Error percentage test section, its root
According to the baseband receiving signals that signal carries out quadrature demodulation and generates that receive to carrier frequency band, detection represents the Baseband Receiver letter
Number phase error error percentage signal；Modulation recognition portion, the sequence of the error percentage signal as input, is performed by which
Will be any in multiple phase ranges of each described error percentage Modulation recognition to the detection range for delimiting the phase error
The classification of one is processed；Repetitive control portion, which performs and judges whether predetermined number of times is classified into the error percentage signal
The determination processing of the specific phase range of at least one in the plurality of phase range, wherein, the predetermined number of times is by nature
Number definition；Processing unit is updated, which has been classified into the specific phase range institute being judged to the error percentage signal
When stating predetermined number of times time, the renewal process for reducing the detection range is performed；Signal output portion, its be judged to it is described specific
Phase range meet regulation introducing condition when, using the value in the specific phase range as the phase error steady-state value
And export signal corresponding with the steady-state value；And condition management department, its setting and the transformat for representing the reception signal
Parameter and represent transmission path state state detection signal at least one party it is corresponding introduce judge number of times, it is described repeatedly
Control unit the execution number of times for updating process has been reached described introducing and has judged this condition of number of times as the introducing condition,
Judge whether the specific phase range meets the introducing condition, the Modulation recognition portion, the repetitive control portion and institute
State renewal processing unit and perform repeatedly the classification process, the determination processing and renewal process, until the specific phase
Till position scope is judged as meeting the introducing condition.
The reception device of the 2nd mode of the present invention is characterised by having：Quadrature demodulation portion, which uses local oscillation frequency
Rate carries out quadrature demodulation to the reception signal of carrier frequency band, generates baseband receiving signals；Above-mentioned phase error detecting apparatus；And
Agitator, which corrects the local oscillation frequency according to the steady-state value of the phase error.
The phase error detecting method of the 3rd mode of the present invention is characterised by, comprises the following steps：According to carrier frequency
The phase place mistake for receiving the baseband receiving signals that signal carries out quadrature demodulation and generates, detecting the expression baseband receiving signals of band
Poor error percentage signal；Using the sequence of the error percentage signal as input, perform each error percentage signal
The classification of any one being categorized in multiple phase ranges of the detection range for delimiting the phase error is processed；Perform judgement
The error percentage signal specific phase place of at least one that predetermined number of times has been classified in the plurality of phase range
The determination processing of scope, wherein, the predetermined number of times is defined by natural number；It is being judged to that the error percentage signal is divided
When class has arrived the predetermined number of times time in the specific phase range, the renewal process for reducing the detection range is performed；If
In the fixed state detection signal with the parameter for representing the transformat for receiving signal and expression transmission path state at least
The corresponding introducing of one side judges number of times；By it is described update the execution number of times that processes and reached described introducing judge number of times this condition
As the condition of introducing, judge whether the specific phase range meets the introducing condition；And in the specific phase place
When scope is judged as meeting the introducing condition, using the value in the range of the particular phases as the phase error steady-state value
And corresponding with steady-state value signal is exported, in the phase error detecting method, perform repeatedly the classification process, described sentence
It is fixed to process and renewal process, till the specific phase range is judged as meeting the introducing condition.
Invention effect
According to the present invention, processed by performing repeatedly above-mentioned classification process, determination processing and renewal, can gradually reduce phase
The detection range of position error, generates the steady-state value of phase error.Therefore, even if under severe reception environment, it is also possible to perseverance
Fixed accuracy of detection obtains the steady-state value of phase error, therefore, it is possible to shorten the time that carrier frequency is set up needed for synchronization.
Description of the drawings
Fig. 1 is the functional block diagram of the configuration example of the reception device for roughly illustrating embodiment of the present invention 1.
Fig. 2 is the figure of the structure of 1 symbol (OFDM symbol) for roughly illustrating baseband signal.
Fig. 3 is the function of the schematic configuration in the phase error detection portion (phase error detecting apparatus) for illustrating embodiment 1
Block diagram.
Fig. 4 is the functional block diagram of the configuration example of the error percentage test section for roughly illustrating embodiment 1.
Fig. 5 is the figure of the phase plane for illustrating that the multiple phase ranges generated by the segmentation of detection range.
Fig. 6 is the flow chart of the process step in the Modulation recognition portion for roughly illustrating embodiment 1.
Fig. 7 is the flow chart of the process step for roughly illustrating repetitive control portion.
Fig. 8 is the flow chart for roughly illustrating the process step for updating processing unit.
(A) of Fig. 9～(C) is the figure of of the reduction process gradually for illustrating detection range.
(A) of Figure 10～(C) is the figure of another of the reduction process gradually for illustrating detection range.
Figure 11 is the flow chart of of the segmentation step for illustrating phase range.
Figure 12 is the functional block diagram of the configuration example of the reception device for roughly illustrating embodiment of the present invention 2.
Figure 13 is the structure of the error percentage test section in the composition phase error detection portion for roughly illustrating embodiment 2
Figure.
Specific embodiment
Below, the various embodiments of the present invention are explained with reference to.
Embodiment 1.
Fig. 1 is the functional block diagram of the configuration example of the reception device 1 for roughly illustrating embodiment of the present invention 1.Such as Fig. 1 institutes
Show, the reception device 1 is with reception antenna element Rx, tuner section 10, A/D converter (ADC) 11, quadrature demodulation portion 12 and local
Agitator 13.
Tuner section 10 receives wireless signal via reception antenna element Rx.The tuner section 10 pairs wireless signal is implemented at tuning
The analog signal processings such as reason generating the reception signal of carrier frequency band, and by the reception signal output to A/D converter 11.A/D
The analog receiving signal of carrier frequency band is converted to digital received signals by transducer 11, and exports quadrature demodulation portion 12.At this
In embodiment, it is the multi-carrier signal generated using multiple subcarriers (subcarrier), especially multiple pairs to receive signal
OFDM (OFDM of the carrier wave mutually in orthogonality relation：Orthogonal Frequency Division
Multiplexing) signal.
Quadrature demodulation portion 12 uses from local oscillator 13 the oscillation frequency signal Os for providing, to the defeated of A/D converter 11
Going out carries out quadrature demodulation, generates base band (baseband) and receives signal r (t) (t express times.).Baseband receiving signals r (t)
It is the complex signal comprising same phase constituent and orthogonal component.Frequency of oscillation f represented by oscillation frequency signal OsSWith by transmitter
Carrier frequency f that (not shown) is used for the transmission of wireless signalCCorrespondence, but not necessarily with carrier frequency fCIt is identical, have
When frequency of oscillation fSComprising frequency error Δ f.
Fig. 2 is the figure of the structure of 1 symbol (OFDM symbol) for roughly illustrating baseband signal.As shown in Fig. 21 symbol
Number include：Including the significant character of the multiple data symbols being frequency division multiplexed；And by with the tail portion of the significant character
Protection interval GI that signal identical redundant signals are constituted.During during 1 symbol, (1 symbol lengths) possess significant character
The guard period Tg of Tu and the length as protection interval GI.In addition, in the present embodiment, protection interval GI is configured to
Close to before significant character, but not limited to this.For example, after protection interval can also be configured to and then significant character.
Additionally, as shown in figure 1, reception device 1 has the inspection of transport format detection portion 21, synchronous detecting portion 22 and phase error
Survey portion 23.Transport format detection portion 21 is with the work(that the various parameters for representing transformat are detected according to baseband receiving signals r (t)
Energy.In the present embodiment, baseband receiving signals r (t) include the lead code portion for periodically being inserted.Transport format detection portion 21
For example can detect and represent sending mode, protection interval length (protection period according to the lead code portion of baseband receiving signals r (t)
Between), significant character length (during significant character), encoding rate, the parameter group of multi-carrier modulation scheme and error correcting code system.
In addition, in the present embodiment, reception device 1 detected the parameter group of transformat according to lead code portion, but
It is not limited to this.The parameter group for representing transformat be not included in lead code portion and in the case of being included in significant character,
The structure of appropriate change reception device 1 detects transformat with according to the output in DFT portions described later 14.As transmission lattice
Formula, for example, can enumerate DAB (Digital Audio Broadcasting, the number followed as Terrestrial Digital Audio broadcast standard
Word audio broadcasting), or as ISDB-T (the Integrated Services Digital of ground digital television broadcast standard
Broadcasting-Terrestrial, integrated service DTB Digital Terrestrial Broadcasting) etc. transformat.
Synchronous detecting portion 22 has following timing synchronization detection function：The symbol of detection baseband receiving signals r (t)
Between border, and would indicate that the timing signal St of its result is supplied to DFT portions described later 14.The method on the border between detection symbols
It is not particularly limited, known method.For example, effective symbol of computing baseband receiving signals r (t) is capable of in synchronous detecting portion 22
Number tail portion signal and make the protection interval of postpones signal obtained from baseband receiving signals r (t) delay stipulated time
The dependency between signal in GI, and detect the position (moment) of peak-peak in the sequence for representing its correlation as connecing
Receive the beginning place of symbol.
Phase error detection portion 23 has following function：Baseband receiving signals r is detected according to baseband receiving signals r (t)
The steady-state value of the phase error of the sequence of (t), and would indicate that the phase error signal Ep of the steady-state value is supplied to local oscillator
13.Local oscillator 13 is numerical control agitator (NCO：Numerically Controlled Oscillators), can
The frequency error of frequency of oscillation is corrected according to phase error signal Ep.
As shown in figure 1, reception device 1 also have (DFT portions) 14, carrier wave demodulation portion 15 of discrete fast fourier transform portion,
Error correction portion 16 and lsb decoder 17.DFT portions 14 use timing signal St, sample multiple from each symbol of baseband receiving signals r (t)
Time-domain signal, and the time-domain signal that these are sampled is carried out discrete fast fourier transform (orthogonal transformation) to generate multiple frequency domains
Signal.Wherein, it is also possible to substitute discrete fast fourier transform and use the orthogonal transformation of other species.
Carrier wave demodulation portion 15 according to the multi-carrier modulation scheme notified from transport format detection portion 21, for each subcarrier pair
The output in DFT portions 14 carries out carrier wave demodulation (digital demodulation) to generate receiving data signal sequence.As multi-carrier modulation scheme, example
QPSK (Quadrature Phase Shift Keying, QPSK) or M system QAM (M-ary can such as be enumerated
Quadrature Amplitude Modulation (M ary quadrature amplitudes)；M is more than 2 integer), but it is not limited to this
A little modes.
Error correction portion 16 is according to error correcting code system (such as Reed Solomon code mode notified from transport format detection portion 21
Or convolutional code mode), error correction is performed to the output sequence in carrier wave demodulation portion 15.The error correction portion 16 is with the process in correction process
Middle detection represents the function of the parameter (bit error rate) of the quality of input signal.Error correction portion 16 would indicate that the quality signal of the parameter
Sq is supplied to phase error detection portion 23.Quality signal Sq is the signal for representing received signal quality, while and representing transmission
The state detection signal of path status.Then, lsb decoder 17 processes to the output perform decoding in error correction portion 16 and obtains solving yardage
According to.
Then, the structure in phase error detection portion 23 is illustrated with reference to Fig. 3.
Fig. 3 is the work(of the schematic configuration in the phase error detection portion (phase error detecting apparatus) 23 for illustrating embodiment 1
Can block diagram.As shown in figure 3, phase error detection portion 23 have error percentage test section 31, repeatedly processing unit 41, buffer unit 42,
Signal output portion 43, detection range management department 44 and branch management portion (condition management department) 45.
Error percentage test section 31 has following function：Detection represents the phase error composition of baseband receiving signals r (t)
Error percentage signal Pe.Fig. 4 is the functional block diagram of the configuration example for roughly illustrating error percentage test section 31.As shown in figure 4, by mistake
Difference composition detection portion 31 includes delay portion 32, correlation operation portion 33, equalization part 34 and equalization control unit 37.
During delay portion 32 makes baseband receiving signals r (t) postpone significant character, Tu postpones baseband receiving signals r to generate
(t-Tu).Correlation operation portion 33 has calculating baseband receiving signals r (t) and postpones between baseband receiving signals r (t-Tu)
Dependency and generate the function of coherent signal Corr (t).Specifically, calculate baseband receiving signals r (t) to connect with base band is postponed
The complex-conjugate signals r of collection of letters r (t-Tu)*(t-Tu) product is used as coherent signal Corr (t).
Currently, in frequency of oscillation f represented by oscillation frequency signal OsSIn the case of comprising frequency error Δ f, base band connects
Collection of letters r (t) includes the phase error composition (=exp (- j2 π Δ ft)) represented by following formula (1).
R (t)=s (t) exp (- j2 π Δ ft) ... (1)
Wherein, s (t) is baseband receiving signals composition when there is no frequency error.
As shown in Fig. 2 the redundant signals in protection interval GI are identical with the signal of the tail portion of significant character, therefore under
Formula (2) is set up.
S (t)=s (t-Tu) ... (2)
Therefore, correlation operation portion 33 can calculate coherent signal Corr (t) provided by following formula (3).
Corr (t)=r (t) × r*(t-Tu)=| s (t) |2exp(j2π·Δf·Tu)...(3)
Therefore, the phase error Δ p of coherent signal Corr (t) can be obtained by following formula (4).
Wherein, tan- 1X () represents the arctan function related to variable x, Re (Corr (t)) is coherent signal Corr (t)
Real part be same phase constituent, Im (Corr (t)) is the imaginary part i.e. orthogonal component of coherent signal Corr (t).In addition, phase place is missed
The detection method of difference Δ p is not limited to the method illustrated to (4) using above formula (1).
Equalization part 34 has following function：Coherent signal Corr (t) is equalized, is generated and is represented phase error composition
Error percentage signal Pe.As shown in figure 4, equalization part 34 is included：Coherent signal Corr (t) is performed flat in each reception symbol
1st equalization part 35 of homogenizing (filtering)；And the output of the 1st equalization part 35 is performed in multiple reception in symbolic range
2nd equalization part 36 of equalization (filtering).Specifically, the 1st interior during each symbol equalization phase of the 1st equalization part 35
Between coherent signal Corr (t) is filtered in the range of Δ 1, the 2nd equalization part 36 is flat with the during multiple symbols the corresponding 2nd
The output of the 1st equalization part 35 is filtered in the range of Δ 2 during homogenizing.These the 1st equalization parts 35 and the 2nd equalization part
36 can respectively by such as FIR (Finite Impulse Response：Finite impulse response (FIR)) wave filter composition.In this case,
During during 1 equalization, Δ the 1 and the 2nd is equalized, Δ 2 is corresponding with the tap length of FIR filter.
Equalization control unit 37 can be using format signal Fd and quality signal Sq as from outside input, and according to lattice
Formula signal Fd and quality signal Sq, the sampling to 36 respective equalization object signal of the 1st equalization part 35 and the 2nd equalization part
Number and sample rate (sampling interval) are controlled.Can pass through to control the 1st equalization part 35 and the sampling in the 2nd equalization part 36
Number is come Δ 1, Δ 2 during controlling the 1st and the 2nd equalization.For example, guard period Tg is longer, can more increase the 1st equalization part 35
In the 1st equalization during Δ 1 (increasing hits) improving the reliability of error percentage signal Pe.Additionally, signal quality is got over
Low, during can more increasing the 2nd equalization in the 2nd equalization part 36, Δ 2 (increasing hits) is improving error percentage signal
The reliability of Pe.Thus, equalization part 34 and equalization control unit 37 can be performed most according to transformat and/or reception environment
Good handling averagely.
As shown in figure 3, processing unit 41 has Modulation recognition portion 51, repetitive control portion 52, updates processing unit 53 and shape repeatedly
State monitoring unit 54.The sequence of error percentage signal Pe as input, is performed each error percentage signal by Modulation recognition portion 51
Multiple phase ranges PA1 of the detection range of the delimitation phase error that Pe is categorized on phase plane ..., (N is more than 2 to PAN
Positive integer) in the classification of any one process, and would indicate that the detection signal Pa point of the particular phases scope of its class object
Repetitive control portion 52, Stateful Inspection portion 54 and buffer unit 42 Shu Chu not be arrived.The sequence of 42 interim storage detection signal Pa of buffer unit.
Error percentage signal Pe is the complex signal with same phase constituent I and orthogonal component Q, therefore same with above formula (4), with using tan- 1(Q/I) phase error for showing.Therefore, it is possible to the phase range by points of the error percentage signal Pe on phase plane is included
PAk (k is any one in 1～N) is defined as the phase range of class object.
The detection range of phase error for example can be carried out as 0 °～360 °, 0 °～180 ° or 0 °～90 ° of scope
Variable setting.Phase range PA1 ..., PAN obtained by being divided into multiple by detection range according to given accuracy of detection
Arrive.Fig. 5 be illustrate detection range be 0 °～90 ° and accuracy of detection be in the case of 30 ° with 3 phase ranges PA1, PA2,
The figure of the phase plane of PA3.As shown in figure 5,0 °～90 ° of detection range is divided into more than or equal to 0 ° and less than or equal to 30 °
Phase range PA1, phase range PA2 more than 30 ° and less than or equal to 60 ° and the phase place more than 60 ° and less than or equal to 90 °
3 phase ranges PA1, PA2, PA3 as scope PA3.
Control signal Rc is supplied to Modulation recognition portion 51 by detection range management department 44, and control signal Rc is above-mentioned except specifying
Beyond detection range and accuracy of detection, designated phase information converting is gone back.Modulation recognition portion 51 can use and be referred to by control signal Rc
Fixed detection range, accuracy of detection and phse conversion information, perform classification to each error percentage signal Pe and process.Relevant phase place
Information converting will be aftermentioned.
Repetitive control portion 52 is performed according to detection signal Pa, the whether continuous predetermined number of times of decision errors twocomponent signal Pe (=
TH1 be classified into) phase range PA1 ..., the determination processing of the specific phase range of at least one in PAN, in other words, hold
Row judges the process of the whether continuous predetermined number of times of specific phase range represented by detection signal Pa.The predetermined number of times is (below
Referred to as " update and judge number of times TH1 ".As long as) more than 1 natural number, specified by branch management portion 45.It is being judged to miss
In the case that difference twocomponent signal Pe is classified into specific phase range with continuously updating judgement number of times TH1, repetitive control portion 52
More new command PB1 is sent to updating processing unit 53.Wherein, specific phase range be not limited to phase range PA1 ..., in PAN
1 scope, it is also possible to comprising phase range PA1 ..., the continuous multiple phase ranges in PAN.In the case of fig. 5, can
By the angular range of particular phases scope is appointed as 0 °～60 °, two phase ranges PA1, PA2 are set to into specific phase place
Scope.The angular range can be specified by branch management portion 45.
Update processing unit 53 when more new command PB1 being received from repetitive control portion 52, execution makes what detection range reduced
Renewal is processed.Specifically, update processing unit 53 and generate control signal Pu for indicating that detection range reduces, and by the control signal
Pu is supplied to detection range management department 44.Detection range management department 44 generates control signal Rc according to control signal Pu, and should
Control signal Rc is supplied to Modulation recognition portion 51, wherein, control signal Rc specifies the detection model narrower than current detection range
Enclose, and delimit multiple phase ranges of the detection range.
It is anti-that Modulation recognition portion 51, repetitive control portion 52, renewal processing unit 53 and detection range management department 44 cooperate ground
Above-mentioned process is performed again, thus enables that detection range gradually reduces.Repetitive control portion 52 has the above-mentioned specific phase place of judgement
Whether scope meets the function of the introducing condition of regulation, when specific phase range is contracted to the introducing condition for meeting regulation
During scope, Stateful Inspection instruction PB2 is sent to Stateful Inspection portion 54.For example, the renewal for updating processing unit 53 can be processed
Perform number of times and reach predetermined number of times (hereinafter referred to as " introducing judges number of times TH2 ".) this condition is set to introducing condition.Introducing is sentenced
Determine number of times TH2 to be specified by branch management portion 45.
When Stateful Inspection instruction PB2 is received from repetitive control portion 52, judgement is judged as meeting in Stateful Inspection portion 54
Whether phase range PA# of introducing condition further meets the limit of regulation.Specifically, following condition can be set
For limit：The phase of the error percentage signal Pe reclassified by Modulation recognition portion 51 after Stateful Inspection instruction PB2 is sent
Position scope PAc is consistent with each other with particular phases scope PA#.Represent that the data of specific phase range PA# are accumulated in caching
In portion 42, therefore Stateful Inspection portion 54 obtains the data for representing specific phase range PA# from buffer unit 42, and confirms by from letter
Whether newest phase range PAc that the detection signal Pa that number division 51 is provided is represented is mutual with specific phase range PA#
Unanimously, thus, it is possible to check whether phase range PA# is in the range of steady statue.
When being judged to that phase range PA# meets limit, Stateful Inspection portion 54 is judged to that phase range PA# is in
The scope of steady statue, will allow output signal Eb to export signal output portion 43, and to repetitive control portion 52 and detection range
Management department 44 sends process instruction Re repeatedly.On the other hand, when being judged to that phase range PA# is unsatisfactory for limit, state
Monitoring unit 54 exports permission output signal Eb, and detection range management department 44 and repetitive control portion 52 are sent and processed repeatedly
Instruction Re.Detection range and accuracy of detection are reset to by detection range management department 44 respectively that receive process instruction Re repeatedly
The scope and precision of original state, generates control signal Rc.On the other hand, receive repeatedly the repetitive control portion of process instruction Re
Built-in variable is reset to initial value by 52, restarts to process repeatedly.
Signal output portion 43 reads expression from buffer unit 42 and is judged as meeting limit according to output signal Eb is allowed
Phase range PA# data, the representative value (intermediate value of such as phase range PA#) of phase range PA# is set to into phase place
The steady-state value of error, and export phase error signal Ep corresponding with the steady-state value.The value represented by phase error signal Ep can
Being the steady-state value itself, or can also be value of the steady-state value divided by frequency error obtained from 2 π Tu.Here, signal is defeated
Going out portion 43 can be so that processing unit (such as local oscillator of Fig. 1 of the rear class for being adapted to be connected to phase error detection portion 23
13) mode of input interface generates phase error signal Ep.
Branch management portion 45 has following function：Updated according to format signal Fd and quality signal Sq settings and judge number of times
TH1 and introducing judge the value of number of times TH2.For example, can will update and judge number of times TH1 and introduce to judge that number of times TH2 suitably sets
It is value corresponding with sending mode and/or guard period Tg.
Additionally, branch management portion 45 can will update and judge number of times TH1 and introduce to judge number of times according to quality signal Sq
TH2 is set as value corresponding with signal quality.Specifically, branch management portion 45 can be judged as passing according to quality signal Sq
Reduce when defeated path status deteriorate and introduce the setting value for judging number of times TH2, increase when being judged as that transmission path state becomes good
It is big to introduce the setting value for judging number of times TH2.Thereby, it is possible to guarantee constant demodulated signal matter corresponding with transmission path state
Amount.Additionally, following effect is also obtained：Constant introducing can be maintained in the case where transmission path state is not essentially dependent on
Speed.
Also, update and judge that the setting value of number of times TH1 more increases, branch management portion 45 can more reduce introducing and judge number of times
The setting value of TH2, updates and judges that the setting value of number of times TH1 more reduces, and branch management portion 45 can more increase introducing and judge number of times
The setting value of TH2.Stability and transmission path state thereby, it is possible to complementally control introducing action is followed to time fluctuation
Property.
Then, describe the action in above-mentioned phase error detection portion 23 in detail.
Fig. 6 is the flow chart of the process step for roughly illustrating Modulation recognition portion 51.As shown in fig. 6, Modulation recognition portion 51
With reference to control signal Rc provided from detection range management department 44, detection range, accuracy of detection and the phase place of phase error are obtained
Information converting (step S11).Then, Modulation recognition portion 51 carries out waiting (the step till error percentage signal Pe is transfused to
S12's is no).When error percentage signal Pe is transfused to (step S12 be), 51 decision errors twocomponent signal Pe of Modulation recognition portion
Phase place whether in (step S13) in detection range, in the situation of the phase place in detection range of error percentage signal Pe
Under (step S13 be), by error percentage signal Pe be categorized into delimit detection range phase range PA1～PAN in it is any
One (step S14).Then, output represents the detection signal Pa (step S16) of the phase range of its class object.Then, locate
Reason proceeds to step S11.
On the other hand, when the phase place for being judged to error percentage signal Pe in step s 13 is not at the feelings in detection range
Under condition (step S13 no), amount δ that the phase shift (conversion) of error percentage signal Pe is represented by phse conversion information makes
Error percentage signal Pe moves to (step S15) in detection range.Then, Modulation recognition portion 51 will move the mistake after phase place
Difference twocomponent signal Pe is categorized into any one (step S14) in phase range PA1～PAN.Then, output represents its classification mesh
The detection signal Pa (step S16) of target phase range and phase-shift phase δ.Here, most start to perform classification in Modulation recognition portion 51
In the case of process, the phase place of error percentage signal Pe must be in detection range, therefore not execution step S15.Relevant step
Rapid S15 will be aftermentioned.
Then, Fig. 7 and Fig. 8 are the flow processs of the process step for roughly illustrating repetitive control portion 52 and updating processing unit 53
Figure.
As shown in fig. 7, when starting, repetitive control portion 52 would indicate that the variable of the continuous detecting number of times of same phase range
Nc and expression update the variable Ni of the execution number of times for processing and are initialized as initial value (=0) (step S21).Then, control repeatedly
Portion processed 52 obtains renewal and judges number of times TH1 and introduce to judge number of times TH2 with reference to control signal Bc provided from branch management portion 45
(step S22).Then, repetitive control portion 52 judges whether variable Nc judges number of times TH1 (step S23) less than updating.In variable
Nc is less than to update and judges in the case of number of times TH1 (step S23 be), and repetitive control portion 52 carries out waiting until being transfused to detection
Till signal Pa (step S24 no).
When detection signal Pa is transfused to (step S24 be), repetitive control portion 52 ought by what is represented by detection signal Pa
Front phase range is compared (step S25) with previous phase range.In current phase range and previous phase range one
In the case of cause (step S26 be), i.e., in the case where continuously have input the detection signal Pa for representing same phase range, instead
Multiple control unit 52 makes variable Nc increase by 1 (step S27).On the other hand, differ with previous phase range in current phase range
In the case of cause (step S26 no), i.e., in the detection signal that have input the phase range for representing different from previous phase range
In the case of Pa, variable Nc is set as 1 (step S28) by repetitive control portion 52.Then, process is made to proceed to step S22.
Then, when being judged to that variable Nc has reached renewal judgement number of times TH1 (step S23 no), that is, it is being judged to miss
Difference twocomponent signal Pe is continuous update judge number of times TH1 be classified into phase range PA1 ..., the particular phases scope in PAN
When, repetitive control portion 52 judges to update whether execution times N i for processing has reached introducing judgement number of times TH2 (step S30).
Not yet reach in execution times N i for updating process and introduce in the situation (step S30 no) for judging number of times TH2, instead
Multiple control unit 52 sends more new command PB1 to renewal processing unit 53 and makes which perform renewal and process (step S31).Fig. 8 is outline
Illustrate by update processing unit 53 perform renewal process the step of flow chart.
As shown in figure 8, updating processing unit 53 judges whether the specific phase range includes minimum phase (=0 °) (step
S41).In the case where the specific phase range is the scope comprising minimum phase (=0 °) (step S41 be), at renewal
Reason portion 53 indicates diminution (step S42) of the detection range to the specific phase range to detection range management department 44.Detection model
Enclose management department 44 to update detection range according to the instruction and delimit multiple phase ranges of the detection range, therefore Modulation recognition portion
51 perform classification to error percentage signal Pe using the detection range and multiple phase ranges after updating is processed.Performing the step
After rapid S42, update processing unit 53 and would indicate that the variable Ni for updating the execution number of times for processing increases by 1 (step S44), and then would indicate that
The variable Nc of continuous detecting number of times is initialized as zero (step S45), S22 the step of then make process proceed to Fig. 7.
On the other hand, it is judged to that the specific phase range does not include the situation of minimum phase (=0 °) in step S41
Under (step S41 no), update processing unit 53 by the specific phase range be transformed to the phase range comprising minimum phase (step
Rapid S43), and diminution (step S42) of the detection range to the phase range after the conversion is indicated to detection range management department 44.Connect
, S22 the step of update processing unit 53 and variable Nc is initialized as zero (step S45), and make process proceed to Fig. 7.
Then, update processing unit 53 by performing repeatedly renewal process (step S31) gradually to reduce detection range.Fig. 9
(C) of (A)～Fig. 9 be the figure of of the reduction process gradually for illustrating detection range.(A) of Fig. 9 is shown below
The figure of phase plane, the phase plane are represented with the detection range of 30 ° of 0 °～90 ° delimited under original state of accuracy of detection and are obtained
Phase range PA1 (Ni=0) that arrives, PA2 (0), PA3 (0).For example, expression is have input with judging number of times TH1 in continuous renewal
In the case of the detection signal Pa of phase range PA1 (0) (the step of Fig. 7 S23 no), updating processing unit 53 can make detection model
Enclose and narrow down to phase range PA1 (0), and as shown in (B) of Fig. 9 with 10 ° of accuracy of detection by phase range PA1 (0) point
It is segmented into multiple phase ranges PA1 (Ni=1), PA2 (1), PA3 (1) (the step of Fig. 8 S42).And, judge in continuous renewal
Have input in the case of the detection signal Pa of expression phase range PA1 (1) (step S23 no) number of times TH1, update processing unit
53 can make detection range narrow down to phase range PA1 (0), and as shown in (C) of Fig. 9 with 5 ° of accuracy of detection by the phase place
Scope PA1 (0) is divided into phase range PA1 (Ni=2), PA2 (2) (the step of Fig. 8 S42).
On the other hand, in (A) of Fig. 9, for example, expression phase range is have input with judging number of times TH1 in continuous renewal
In the case of the detection signal Pa of PA3 (0) (the step of Fig. 7 S23 no), it is judged to that phase range PA3 (0) is not comprising most
The scope (the step of Fig. 8 S41 no) of little phase place (=0 °), thus update processing unit 53 make phase range PA3 (0) rotate-
60 ° and make which be transformed to the phase range (step S43) comprising minimum phase (=0 °), and make detection range narrow down to the conversion
Phase range (step S42) afterwards.Phase range and phase range PA1 (0) in the example of (A) of Fig. 9, after conversion
Cause.Update processing unit 53 phase-shift phase (rotation amount) δ of phase range PA3 (0) to be notified to detection range management department 44, therefore examine
Survey scope management portion 44 and can would indicate that the phse conversion information of phase-shift phase δ is supplied to Modulation recognition portion 51.
By so detection range being limited to all the time in the phase range comprising minimum phase (=0 °), it is possible to increase phase
The accuracy of detection of the steady-state value of position error.For example, in the precision performance phase error with 8 bit resolutions, phase error can use
256 grades of centrifugal pump performance.In this case, for example can be of about 0.355 ° by the resolution performance of 0 °～90 ° of detection range is
Only, on the other hand, till being of about 0.121 ° by the resolution performance of 0 °～30 ° of detection range.Therefore, exist in resolution
In the case of restriction in design, detection range is more reduced, the accuracy of detection of the steady-state value of phase error can be more improved.
With reference to Fig. 7, when being judged to that execution times N i for updating process reaches introducing judgement number of times TH2 in step s 30
(step S30 be), repetitive control portion 52 send Stateful Inspection instruction PB2 (step S32) to Stateful Inspection portion 54, and complete place
Reason.
As described above, Stateful Inspection portion 54 is judged in step according to the Stateful Inspection instruction PB2 from repetitive control portion 52
Be judged as reaching in S30 phase range PA# for judging number of times TH2 is introduced with the new phase range represented by detection signal Pa
Whether PAc is consistent, in the case where phase range PA# is consistent with phase range PAc, output signal Eb will be allowed to be supplied to signal
Output section 43, then sends process instruction Re repeatedly to detection range management department 44 and repetitive control portion 52.On the other hand, in phase
In the case that position scope PA# is inconsistent with phase range PAc, Stateful Inspection portion 54 allows the situation of output signal Eb not generating
Under, process instruction Re repeatedly is sent to detection range management department 44 and repetitive control portion 52.Detection range management department 44 is according to anti-
The value of detection range, accuracy of detection and phse conversion information is reset to scope, the essence of original state by multiple process instruction Re respectively
Degree and value, generate control signal Rc.Meanwhile, repetitive control portion 52 and renewal processing unit 53 are performed at the judgement shown in Fig. 7 and Fig. 8
Reason and renewal are processed.
As described above, signal output portion 43 reads expression from buffer unit 42 and is judged as completely according to output signal Eb is allowed
The data of phase range PA# of sufficient limit, and export phase error signal Ep corresponding with phase range PA#.Here, exist
The step of performing Fig. 8 S43 and move in the situation (the step of Fig. 6 S15) of the phase place of error percentage signal Pe, signal output portion
43 phase ranges that phase range PA# is inversely transformed into script, generate phase place corresponding with the phase range after the inverse transformation and miss
Difference signal Ep is simultaneously exported.
In addition, (C) of (A)～Figure 10 of Figure 10 is the figure of another of the reduction process gradually for illustrating detection range.
(A) of Figure 10 is the figure of the phase plane being shown below, and the phase plane is represented with 0 ° of 45 ° of delimitation original states of accuracy of detection
Phase range PA1 (Ni=0), PA2 (0) obtained from～90 ° of detection range.For example, number of times TH1 is judged in continuous renewal
Have input in the case of the detection signal Pa for representing phase range PA1 (0) (the step of Fig. 7 S23 no), update processing unit 53
Detection range can be made to narrow down to phase range PA1 (0), and by phase range PA1 (0) point as shown in (B) of Figure 10
It is segmented into phase range PA1 (Ni=1), PA2 (1), PA3 (1), PA4 (1), PA5 (1), PA6 (1) (the step of Fig. 8 S42).Figure 10
(C) with represent condition that error percentage signal Pe should meet and respectively phase range PA1 (1) corresponding with these conditions,
The figure of the corresponding relation between PA2 (1), PA3 (1), PA4 (1), PA5 (1), PA6 (1).If illustrated using (C) of Figure 10
Condition, then Modulation recognition portion 51 can be at execution classification in the case of the phase value of not direct calculation error twocomponent signal Pe
Reason.
Hereinafter, phase range PA1 (0) after the diminution of (A) of Figure 10 is divided into into figure with reference to the flow chart explanation of Figure 11
The step of phase range PA1 (1) of 10 (B)～PA6 (1).Update detection range PA1 of the processing unit 53 first after diminution
(0) setting reference signal point P0 (step S51) in.Reference signal point P0 is by same phase constituent I0With orthogonal component Q0Constitute
Signaling point.Wherein, with same phase constituent I0Relative to orthogonal component Q0Ratio (=I0/Q0) be 2 power (=2n；N is positive integer)
Mode set reference signal point P0.In the example of (B) of Figure 10, ratio I0/Q0For 23(=8).Then, update processing unit
53 in the interior setting signal point P1～P5 of detection range PA1 (0), and signaling point P1～P5 is with coordinating with the same of reference signal point P0
Divide I0Identical is with phase constituent and has orthogonal component Q0Positive integer times orthogonal component (step S52).Then, renewal is processed
Portion 53 is divided into detection range PA1 (0) with by reference signal point P0 and signaling point P1～P5 and the original on phase plane
Multiple phase ranges PA1 (1)～PA6s (1) (step S53) of the straight line LN0～LN5 of point for boundary line.
As described above, in the phase error detection portion 23 of embodiment 1, Modulation recognition portion 51, control repeatedly
Portion processed 52 and renewal processing unit 53 perform repeatedly classification process, determination processing and renewal respectively and process, thus, it is possible to gradually reduce
The detection range of phase error is generating the steady-state value of phase error.Therefore, even if under severe reception environment, it is also possible to
Constant accuracy of detection obtains the steady-state value of phase error, therefore the available load that can shorten at the local oscillator 13 of Fig. 1
The effect of the time that wave frequency is set up needed for synchronization.The effect can be real in the case of not increasing circuit scale and operand
It is existing.
Additionally, detection range is limited to all the time in the phase range comprising minimum phase (=0 °) (the step of Fig. 8 S41,
S43), even if therefore in the case of the restriction that resolution is deposited in design, it is also possible to improve the inspection of the steady-state value of phase error
Survey precision.
Also, as shown in figure 4, equalization control unit 37 can control the 1st flat according to format signal Fd and quality signal Sq
Δ 1, Δ 2 during the 1st and the 2nd equalization in homogenizing portion 35 and the 2nd equalization part 36, therefore equalization part 34 and equalization control
Portion processed 37 can perform optimal handling averagely according to transformat and/or reception environment.In addition, equalization control unit 37 is also
Can not rely on quality signal Sq, and according only to the 1st and the 2nd equalization of format signal Fd controls during Δ 1, Δ 2.The situation
Under, optimal handling averagely corresponding with transformat can be carried out.
Embodiment 2.
Then, embodiments of the present invention 2 are illustrated.Figure 12 is the reception device 2 for roughly illustrating embodiment of the present invention 2
Configuration example functional block diagram.The structure of the reception device 2 of present embodiment has except substituting phase error detection portion 23
It is beyond the aspect of phase error detection portion 23B, identical with the structure of the reception device 1 of above-mentioned embodiment 1.In present embodiment
In, phase error detection portion 23B receives the supply of timing signal St from synchronous detecting portion 22.
Additionally, Figure 13 is the structure for roughly illustrating the error percentage test section 31B for constituting phase error detection portion 23B
Figure.The structure of the phase error detection portion 23B of embodiment 2 is except with the dependency fortune in error percentage test section 31B
It is beyond calculation portion 33B, identical with the structure in the phase error detection portion 23 of embodiment 1.
In the present embodiment, as shown in figure 13, correlation operation portion 33B can using timing signal St as input, and
Correlation operation is performed according to timing signal St.By using timing signal St, can calculate exactly and be illustrated by above-mentioned formula (3)
Coherent signal Corr (t).Therefore, it is possible to more accurately detect the steady-state value of phase error.
The variation of embodiment 1,2.
More than, the various embodiments of the present invention are described referring to the drawings, but above-mentioned embodiment 1,2 is all of the invention
Illustrate, various modes other than the above can also be adopted.For example, represent that the state detection signal of transmission path state is not limited to
State quality signal Sq.Above-mentioned error percentage test section 31 and branch management portion 45 (Fig. 3) can substitute above-mentioned quality signal Sq, and
Using the signal for for example representing reception CN ratios (carrier-to-noise power ratio), averaged Received Signal level and/or Doppler frequency
As the state detection signal for representing transmission path state.In this case, in the reception device 1,2 of above-mentioned embodiment 1,2
Add and the CN of CN ratios is received than test section, according to baseband signal r (t) according to the demodulating data detection generated by carrier wave demodulation portion 15
The level detection portion of detection averaged Received Signal level and/or Doppler frequency test section.
Additionally, the structure of the reception device 1,2 of above-mentioned embodiment 1,2 is not limited to the structure of Fig. 1 and Figure 12, can include
Correction receives the equalizer of the distortion that signal is subject to from transmission path, and/or performs interleaver of de-interlacing process etc. and processes mould
Block.
Additionally, in above-mentioned embodiment 1,2, phase error signal Ep is used for controlling local oscillator 13, but not
It is limited to this, it is also possible to which the A/D transformed errors for A/D converter 11 are corrected.
Additionally, the partial function of above-mentioned reception device 1,2 can be realized by hardware configuration, or can also be by by wrapping
The computer program that microprocessor containing CPU is performed is realized.In the case that active computer program realizes a part for the function,
Microprocessor by the computer program is loaded from the recording medium of embodied on computer readable and can be performed realizing the function
A part.
Additionally, all or part of structure of above-mentioned reception device 1,2 can pass through LSI (Large Scale
Integrated circuit：Large scale integrated circuit) realize.Additionally it is possible to pass through FPGA (Field-Programmable
Gate Array：Field programmable gate array) or ASIC (Application Specific Integrated Circuit：Face
To the integrated circuit of special-purpose) realize all or part of structure of reception device 1,2.
Also, above-mentioned reception device 1,2 can also be configured to digital broacast receiver (comprising television broadcast receiver and
Audio broadcast receiver.), receiving terminal these communicators of wireless LAN device or mobile communication system.
Label declaration
Rx：Reception antenna element；1、2：Reception device；10：Tuner section；11：A/D converter (ADC)；12：Quadrature demodulation
Portion；13：Local oscillator；14：Discrete fast fourier transform portion (DFT portions)；15：Carrier wave demodulation portion；16：Error correction portion；17：Solution
Code portion；21：Transport format detection portion；22：Synchronous detecting portion；23：Phase error detection portion；31：Error percentage test section；32：
Delay portion；33：Correlation operation portion；34：Equalization part；35：1st equalization part；36：2nd equalization part；37：Equalization control
Portion processed；41：Processing unit repeatedly；42：Buffer unit；43：Signal output portion；44：Detection range management department；45：Branch management portion；
51：Modulation recognition portion；52：Repetitive control portion；53：Update processing unit；54：Stateful Inspection portion.
Claims (10)
1. a kind of phase error detecting apparatus, it is characterised in that the phase error detecting apparatus have：
Error percentage test section, its Baseband Receiver letter for carrying out quadrature demodulation and generating according to the reception signal to carrier frequency band
Number, detection represents the error percentage signal of the phase error of the baseband receiving signals；
Modulation recognition portion, the sequence of the error percentage signal as input, is performed each error percentage signal by which
The classification of any one being categorized in multiple phase ranges of the detection range for delimiting the phase error is processed；
Repetitive control portion, which performs and judges whether predetermined number of times has been classified into the plurality of phase place to the error percentage signal
The determination processing of the specific phase range of at least one in scope, wherein, the predetermined number of times is defined by natural number；
Processing unit is updated, which is being judged to that it is specified described in the specific phase range that the error percentage signal has been classified into
It is secondary for several times when, perform and reduce the renewal of the detection range and process；
Signal output portion, its when being judged to that the specific phase range meets the introducing condition of regulation, by the specific phase
Steady-state value output with the steady-state value corresponding phase error signal of the value in the range of position as the phase error；And
Condition management department, the shape of the parameter and expression transmission path state of its setting transformat for receiving signal described with expression
The corresponding introducing of at least one party in state detection signal judges number of times,
When the specific phase range is judged as being unsatisfactory for the introducing condition, the Modulation recognition portion, it is described repeatedly
Control unit and the renewal processing unit perform repeatedly the classification process, the determination processing and the renewal and process.
2. phase error detecting apparatus according to claim 1, it is characterised in that
The repetitive control portion using it is described update process execution number of times reached it is described introduce judge this condition of number of times as
The introducing condition, judges whether the specific phase range meets the introducing condition,
The Modulation recognition portion, the repetitive control portion and the renewal processing unit perform repeatedly the classification and process, described sentence
It is fixed to process and renewal process, till the specific phase range is judged as meeting the introducing condition.
3. phase error detecting apparatus according to claim 2, it is characterised in that
The condition management department reduces described when the transmission path state deteriorating is judged as according to the state detection signal
Introduce the setting value for judging number of times.
4. a kind of phase error detecting method, it is characterised in that the phase error detecting method is comprised the following steps：
According to the baseband receiving signals that signal carries out quadrature demodulation and generates that receive to carrier frequency band, detection represents the base band
Receive the error percentage signal of the phase error of signal；
Using the sequence of the error percentage signal as input, perform each described error percentage Modulation recognition is described to delimiting
The classification of any one in multiple phase ranges of the detection range of phase error is processed；
Perform and judge whether predetermined number of times has been classified in the plurality of phase range at least 1 to the error percentage signal
The determination processing of individual specific phase range, wherein, the predetermined number of times is defined by natural number；
When being judged to that the error percentage signal has been classified into the predetermined number of times time in the specific phase range, hold
Row reduces the renewal of the detection range and processes；
When being judged to that the specific phase range meets the introducing condition of regulation, the value in the specific phase range is made
Steady-state value output phase error signal corresponding with the steady-state value for the phase error；
In the state detection signal of the parameter and expression transmission path state of the setting transformat for receiving signal described with expression
At least one party it is corresponding introduce judge number of times；And
When the specific phase range is judged as being unsatisfactory for the introducing condition, the classification process, institute are performed repeatedly
State determination processing and the renewal is processed.
5. phase error detecting method according to claim 4, it is characterised in that
The phase error detecting method also includes that the execution number of times for updating process has been reached described introducing judges number of times
The step of whether specific phase range meets the introducing condition judged as the condition of introducing for this condition,
In the phase error detecting method, perform repeatedly the classification process, the determination processing and the renewal and process,
Till the specific phase range is judged as meeting the introducing condition.
6. phase error detecting method according to claim 5, it is characterised in that the phase error detecting method is also wrapped
Include following steps：
When the transmission path state deteriorating is judged as according to the state detection signal, reduces described introducing and judge number of times
Setting value.
7. the phase error detecting method according to any one in claim 4～6, it is characterised in that the phase place
Error detection method is further comprising the steps of：
The setting value of the predetermined number of times is bigger, more reduces the setting value for introducing and judging number of times.
8. the phase error detecting method according to any one in claim 4～6, it is characterised in that
The phase error detecting method also includes determining whether to be judged as the specific phase range for meeting the introducing condition
The step of whether further meeting the limit of regulation,
When the specific phase range is judged as meeting the limit, the step of the output phase error signal is performed
Suddenly, when the specific phase range is judged as being unsatisfactory for the limit, do not perform the output phase error signal
The step of.
9. phase error detecting method according to claim 8, it is characterised in that
In performing the step of the classification is processed, after the specific phase range is judged as meeting the introducing condition,
The error percentage signal is reclassified into any one in the plurality of phase range,
In the step of meeting the limit is determined whether, it is judged as meeting the specific phase place of the introducing condition
Scope with reclassified after consistent this condition of phase range of the error percentage signal be used as the limit.
10. phase error detecting method according to claim 4, it is characterised in that
The parameter includes the value for representing guard period and sending mode.
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| JP2012064110 | 2012-03-21 | ||
| JP2012-064110 | 2012-03-21 | ||
| PCT/JP2012/083865 WO2013140698A1 (en) | 2012-03-21 | 2012-12-27 | Phase error detection device, method for detecting phase error, and receiving device |
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| CN (1) | CN104205762B (en) |
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| US9350470B1 (en) * | 2015-02-27 | 2016-05-24 | Keysight Technologies, Inc. | Phase slope reference adapted for use in wideband phase spectrum measurements |
| JP7403414B2 (en) * | 2020-08-18 | 2023-12-22 | 株式会社日立製作所 | Communication relay device and communication relay method |
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| US20060062341A1 (en) * | 2004-09-20 | 2006-03-23 | Edmondson John H | Fast-lock clock-data recovery system |
| JP4584756B2 (en) * | 2005-04-07 | 2010-11-24 | 日本放送協会 | Pilot signal detection apparatus and method |
| US8736323B2 (en) * | 2007-01-11 | 2014-05-27 | International Business Machines Corporation | Method and apparatus for on-chip phase error measurement to determine jitter in phase-locked loops |
| US8107328B1 (en) * | 2007-10-23 | 2012-01-31 | Marvell International Ltd. | Method and apparatus for calibrating optical recording system |
-
2012
- 2012-12-27 WO PCT/JP2012/083865 patent/WO2013140698A1/en active Application Filing
- 2012-12-27 JP JP2014505977A patent/JP5721904B2/en not_active Expired - Fee Related
- 2012-12-27 CN CN201280071522.XA patent/CN104205762B/en not_active Expired - Fee Related
- 2012-12-27 DE DE112012006561.1T patent/DE112012006561B4/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002009856A (en) * | 2000-06-20 | 2002-01-11 | Toyo Commun Equip Co Ltd | Inverse tangent arithmetic circuit in digital signal processing |
| JP2003092607A (en) * | 2001-07-11 | 2003-03-28 | Toyo Commun Equip Co Ltd | Inverse tangent arithmetic circuit in digital signal processing |
| JP2006211441A (en) * | 2005-01-31 | 2006-08-10 | Matsushita Electric Ind Co Ltd | Ofdm demodulator, integrated circuit, ofdm demodulating method and receiver |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013140698A1 (en) | 2013-09-26 |
| JP5721904B2 (en) | 2015-05-20 |
| CN104205762A (en) | 2014-12-10 |
| DE112012006561T5 (en) | 2015-02-26 |
| DE112012006561B4 (en) | 2020-09-24 |
| JPWO2013140698A1 (en) | 2015-08-03 |
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