CN101540648A - Detection of frame mode information and system information - Google Patents
Detection of frame mode information and system information Download PDFInfo
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- CN101540648A CN101540648A CN200810007400A CN200810007400A CN101540648A CN 101540648 A CN101540648 A CN 101540648A CN 200810007400 A CN200810007400 A CN 200810007400A CN 200810007400 A CN200810007400 A CN 200810007400A CN 101540648 A CN101540648 A CN 101540648A
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Abstract
The invention provides a method and equipment for detecting a frequency spectrum inversion state and/or if an input is carried on a single carrier wave or on a plurality of carrier waves, based on related results. On one hand, a receiver comprises a first signal processing unit which extracts a first data from an input signal based on the single carrier wave, a second signal processing unit which extracts a second data from the input signal based on the plurality of carrier waves, and a logic unit which is coupled with the first and second signal processing units to determine if frequency spectrum inversion occurs in the input signal.
Description
Technical field
At least some embodiment of the present invention relate generally to the frame pattern information in the signal that receives and the detection of system information, and (but being not limited to) relates to that to detect the signal receive be single-carrier signal or multi-carrier signal in particular, and in the signal that receives whether spectrum inversion takes place.
Background technology
In mixing single carrier/multicarrier (SC/MC) data transmission system, receiver is handled the signal that receives, with determine frame pattern information and system information (SI) both.The frame pattern information can comprise carrier mode (for example, single transmission is in SC pattern or MC pattern) and spectrum inversion state (for example, homophase (I) data and quadrature data (Q) whether exchange) mutually in the process of the data that processing receives.System information can comprise modulating mode, code rate, interleaving mode etc.
By convention, carry out the detection of frame pattern information and system information (SI) at forward error recovery (FEC) level place.Use at least two processing levels in proper order to come detection system information (SI).When especially having the deinterlacer with deep degree in receiver system, this scheme may need the long time cycle to obtain the operating parameter of parameter with the locking receiver.
For instance, in conventional SC/MC mixing receiver, at first using the SC/MC detector to detect data is in modulation (SC pattern) on the single carrier wave or modulation (MC pattern) on a plurality of carrier waves.Receiver for example can use peak-to-average power ratio, and (Peak to Average Power Ratio, PAPR) Bi Jiao known method detects the SC/MC pattern.
Whether then, mix receiver detection frequency spectrum is inverted.In order to determine the spectrum inversion state, conventional receiver can be supposed in the not inversion of the process intermediate frequency spectrum of determining system information (SI), and estimation error information, for example PER (bag error rate) that is estimated by forward error recovery (FEC) module.If error is not in the reasonable scope, receiver will be thought spectrum inversion so, and determine system information (SI) and control information once more.When error is in tolerance interval, determine the correct operating parameter of receiver system; And then receiver system is considered as locking onto in the normal accepting state.
System information (SI) (for example modulating mode, code rate and interleaving mode etc.) can be embedded in the signal that is transmitted, as the system information designated symbol.Usually can by to the equalizing system message indicator number directly application maximum a posteriori pattern (Maximum Posterior Mode, MAP) algorithm obtains system information (SI).
In this conventional scheme, need handle at one and determine the frame pattern in the level; And then, handle in the level, detect SI based on this information at another.Therefore, in conventional scheme, need at least two processing levels to obtain system information.This processing scheme before make decision acknowledgement frame bulk-mode information and the system information, spends the long time cycle based on the estimation that is provided by forward error recovery (FEC) module in control logic possibly.If deinterlacer has the darker degree of depth, lock onto the correct time that receiving mode spent so will more extend.If first supposition of frequency spectrum state is wrong, need to repeat described process so, this has further increased the locking time of receiver system.
Summary of the invention
It is the method and apparatus of delivery on single carrier wave or a plurality of carrier wave that this paper describes in order to detect spectrum inversion state and/or input based on correlated results.Some embodiment of general introduction in this section.
In one embodiment of the invention, a kind of receiver comprises:
First signal processing unit, it extracts first data based on single carrier wave from input signal;
The secondary signal processing unit, it extracts second data based on a plurality of carrier waves from described input signal; And
The spectrum inversion detector, itself and the coupling of described first and second signal processing units are to determine in the described input signal whether spectrum inversion having taken place.
In one embodiment of the invention, wherein said detector determines that further described input signal delivery is on the single carrier wave or on a plurality of carrier waves.
In one embodiment of the invention, wherein said detector comprises:
First system information (SI) detector, it provides the first relevant output between described first data and the known system symbol sequence;
Second system information (SI) detector, its produce described first data through the second relevant output between inverted version and the known system symbol sequence;
Tertiary system system information (SI) detector, it produces the 3rd relevant output between described second data and the known system symbol sequence;
Quaternary system system information (SI) detector, its produce described second data through the 4th relevant output between inverted version and the known system symbol sequence; And
Logical block, its value with the described first, second, third and the 4th output compares, and determining whether described inversion to have taken place in the described input signal, and the delivery of described input signal is on the single carrier wave still on a plurality of carrier waves.
In one embodiment of the invention, when wherein the bigger output in described third and fourth exports is greater than the bigger output in described first and second outputs, determine that described input signal delivery is on a plurality of carrier waves; When the bigger output in described third and fourth output during, determine that described input signal delivers on single carrier wave less than the bigger output in described first and second outputs.
In one embodiment of the invention, wherein said first system information (SI) detector makes described first data individually relevant with a plurality of system symbol sequences to discern the first system symbol sequence, and the described first system symbol sequence produces described first output of the relevant output that produces greater than described a plurality of sequences of using except that described first sequence; And the described first system symbol sequence is identified as system symbol by described first data representation by described first system information (SI) detector.
Receiver further comprises in one embodiment of the invention:
Multiplexer, the coupling of itself and described first and second processing units is with based on determining that described input delivery is on single carrier wave still on a plurality of carrier waves and select output from described first and second data; And
The release of an interleave module, itself and described multiplexer and the coupling of described detector, described detector is in order to definite interleaving mode from described first and second data, and described release of an interleave module is in order to come release of an interleave is carried out in the output of described multiplexer according to the described staggered module of being determined by described detector.
Receiver in one embodiment of the invention further comprises:
The forward error recovery module, itself and described release of an interleave module and the coupling of described detector, described detector is in order to determining code check, and described forward error recovery module is estimated error from the data of described release of an interleave module recovery in order to use the determined described code check of described detector at least.
Receiver in one embodiment of the invention further comprises:
Carrier detector, itself and described input are coupled, to determine that described input delivery is on the single carrier wave or on a plurality of carrier waves; And
Multiplexer, itself and described carrier detector are coupled, to select output from described first data and described second data.
Receiver in one embodiment of the invention wherein is provided as the described output of described multiplexer the input of described spectrum inversion detector.
Receiver in one embodiment of the invention, wherein said spectrum inversion detector are further determined the pattern of code check, interleaving mode or quadrature amplitude modulation.
In one embodiment of the invention, a kind of receiver, it comprises:
Radio-frequency module;
Analogue-to-digital converters, itself and described radio-frequency module are coupled, to produce digital input signals the signal that receives from described radio-frequency module place;
First signal processing unit, it uses single carrier wave to extract first data from described digital input signals;
The secondary signal processing unit, it uses a plurality of carrier waves to extract second data from described digital input signals;
A plurality of system information detectors, itself and described first signal processing unit and the coupling of described secondary signal processing unit, with the recognition system symbol, and a plurality of relevant output that provides the system symbol that uses described identification and described first and second data to produce; And
Logical block, itself and described a plurality of system information detector are coupled, and with based on described relevant output, determine described input signal delivery on the single carrier wave or on a plurality of carrier waves, and whether spectrum inversion has taken place in the described input signal.
Wherein said logical block is further determined the pattern of code check, interleaving mode and the quadrature amplitude modulation of the described signal that described radio-frequency module place receives.
In one embodiment of the invention, described receiver further comprises:
Multiplexer, itself and described first signal processing unit and the coupling of described secondary signal processing unit, with based on described input signal delivery on single carrier wave still on a plurality of carrier waves and selection from described first data and described second data; And
The forward error estimation module, the result of described logical block is confirmed in its output based on described multiplexer.Described in one embodiment of the invention receiver, the system information detector is used to make first system symbol that extracts from the frame of described first data relevant with first known symbol to produce the first relevant output, make through inverted first system symbol relevant with second known symbol to produce the second relevant output, make second system symbol that extracts from the frame of described second data relevant with the 3rd known symbol, make through inverted second system symbol relevant with the 4th known symbol to produce the 4th relevant output to produce the output of third phase pass.
Receiver in one embodiment of the invention, wherein said logical block comprises:
First comparing unit, it is coupled to described system information detector, whether is correlated with output greater than the described second relevant output to determine described first, and selects the bigger output in described first and second relevant the outputs;
Second comparing unit, it is coupled to described system information detector, whether closes output greater than the described the 4th relevant output to determine described third phase, and selects the bigger output in the described third and fourth relevant output; And
The 3rd comparing unit, it is coupled to described first and second comparing units, to determine that whether described bigger output in the described first and second relevant outputs is greater than the described bigger output in the described third and fourth relevant output;
Wherein when the described bigger output in the described first and second relevant outputs during greater than the described bigger output in the described third and fourth relevant output, described logical block determines that described input signal delivery is on single carrier wave, when the described first relevant output is correlated with output greater than described second, spectrum inversion does not take place in the described input signal, and when the described first relevant output is correlated with output less than described second, spectrum inversion has taken place in the described input signal; And
Wherein when the described bigger output in the described first and second relevant outputs during less than the described bigger output in the described third and fourth relevant output, described logical block determines that described input signal delivery is on a plurality of carrier waves, when described third phase closes output greater than the described the 4th relevant output, spectrum inversion does not take place in the described input signal, and when described third phase closes output less than the described the 4th relevant output, spectrum inversion has taken place in the described input signal.
In one embodiment of the invention, a kind of method of implementing in receiver comprises:
The signal that receives from radio-frequency module produces digital input signals;
Based on single carrier wave, from described digital input signals, extract first data;
Use a plurality of carrier waves, from described digital input signals, extract second data;
Produce a plurality of relevant outputs based on described first and second data; And
Based on described relevant output, determine described input signal delivery on the single carrier wave or on a plurality of carrier waves, and whether spectrum inversion has taken place in the described input signal.
In one embodiment of the invention, further comprise:
Based on the delivery of described input signal on single carrier wave still on a plurality of carrier waves and selection from described first and second data; And
Based on described selected one forward errors of carrying out in described first and second data are estimated, check described definite result.
In one embodiment of the invention, the described a plurality of relevant outputs of wherein said generation comprise:
Make first system symbol that extracts from the frame of described first data relevant, to produce the first relevant output with first known symbol;
Make through inverted first system symbol relevant with second known symbol, to produce the second relevant output;
Make second system symbol that extracts from the frame of described second data relevant, close output to produce third phase with the 3rd known symbol; And
Make through inverted second system symbol relevant with the 4th known symbol, to produce the 4th relevant output.
In one embodiment of the invention, wherein when the bigger output in the described first and second relevant outputs during greater than the bigger output in the described third and fourth relevant output, determine that described input signal delivery is on single carrier wave, and whether determine greater than the described second relevant output whether spectrum inversion has taken place in the described input signal based on the described first relevant output, and
Wherein when the described bigger output in the described first and second relevant outputs during less than the described bigger output in the described third and fourth relevant output, determine described input signal delivery on a plurality of carrier waves, and close to export whether determine greater than the described the 4th relevant output whether spectrum inversion has taken place in the described input signal based on described third phase.In one embodiment of the invention, further comprise:
Before the release of an interleave module, use the data that produced to determine the code check and the interleaving mode of described input signal.
Description of drawings
In accompanying drawing graphic, the mode unrestricted with example illustrates embodiment, in the accompanying drawings, and same reference indication like.
Fig. 1 explanation is used so that handle relevant to discern the system of frame pattern and spectrum inversion state with the output of multicarrier (MC) processing from single carrier (SC) according to an embodiment.
Fig. 2 and Fig. 3 explanation are used so that handle relevant to discern the alternative system of frame pattern and spectrum inversion state with the output of multicarrier (MC) processing from single carrier (SC) according to an embodiment.
The frame structure that Fig. 4 explanation can be used in receiver according to each embodiment.
Fig. 5 A explanation is according to the block diagram example of the frame mode detector of an embodiment.
Fig. 5 B explanation is according to the block diagram example of the system information detector of an embodiment.
Fig. 6 and Fig. 7 explanation are according to the block diagram example of the Compare Logic of each embodiment.
Fig. 8 shows the method for implementing according to an embodiment in receiver.
Embodiment
It is illustrative below describing content and figure, and should not be interpreted as having restricted.A large amount of specific detail are described, so that complete understanding to be provided.Yet, in some cases, well-known or conventional details is not described, in order to avoid make the description content fuzzy.To the reference of one or an embodiment among the present invention not necessarily to the reference of same embodiment; And this type of referential expression at least one.
At least one embodiment of the present invention is provided for automatically detecting the frame pattern information of mixing in single carrier (SC) and multicarrier (MC) data transmission system and the method and apparatus of system information.
In one embodiment, in the same processing level of recognition system information (for example quadrature amplitude modulation (QAM) pattern, code check and interleaving mode), carry out the detection and the spectrum inversion status detection of carrier mode (SC/MC pattern).
In another embodiment, in independent processing level, carry out the detection and the spectrum inversion status detection of SC/MC pattern, but the both is before forward error recovery (FEC) module.
In one embodiment, make the system information (SI) that from the signal that receives, obtains (for example, demodulation modes, code rate, interleaving mode etc.) different editions relevant with known system symbol sequence, with the best match sequence of determining system symbol and in same processings level place's detection basic frame information (SC/MC pattern and spectrum inversion state).This processing method can be improved processing speed, and determines SC/MC pattern, spectrum inversion state and system information (SI) suitably before the release of an interleave level, has therefore shortened the locking time of hybrid SC/MC system greatly.
Data transmission system can be used different system parameterss at different application.These system parameterss are encoded and send to receiver with pay(useful) load.Usually, system information symbol that correctly receives and the system information data optimum Match that just is being sent out.That is the correlation between the system data that is delivered in system data that, correctly receives and the signal that receives will be maximum usually.One embodiment of the present of invention use this principle to handle the signal that contains the system information symbol that receives, to detect frame pattern information and system information (SI) simultaneously.
Fig. 1 explanation is used so that handle relevant to discern the system of frame pattern and spectrum inversion state with the output of multicarrier (MC) processing from single carrier (SC) according to an embodiment.
In Fig. 1, radio frequency (RF) module (11) and analogue-to-digital converters and frame synchronization level (13) are handled input signal, are used for the input signal of single carrier (SC) processing module (17) and multicarrier (MC) processing module (15) with generation.Single carrier (SC) processing module (17) is handled described signal, as modulated data symbol on single carrier wave; And multicarrier (MC) processing module (15) is handled described signal, as modulated data symbol on a plurality of carrier waves.
In Fig. 1, system information makes SC processing module (17) relevant with the known system information group with the output of MC processing module (15) with frame mode detector (23), to determine optimum Match, and therefore determine in fact on the single carrier wave still on a plurality of carrier waves modulation signal, frequency spectrum whether be inverted and system information.
In case system information and frame mode detector (23) have determined that carrier mode (for example, in fact on the single carrier wave modulation signal on a plurality of carrier waves), multiplexer (19) just is that release of an interleave module (21) is selected correct output, and release of an interleave module (21) is operated based on the interleaving mode of decoding from system information.
In Fig. 1, system information and frame mode detector (23) provide quadrature amplitude modulation (QAM) pattern and code rate with evaluated error to forward direction error correction (FEC) module (25), described error can be used in control logic (27) to determine whether receiver has been in correct mode of operation (for example, being in locking mode).
In Fig. 1, system information and frame mode detector (23) are positioned at release of an interleave module (21) before, to detect various operating parameters (for example, SC/MC pattern, spectrum inversion state and SI) simultaneously.Owing to before release of an interleave consuming time and FEC level, determine operating parameter, so can significantly shorten the locking time of hybrid SC/MC receiver.
Fig. 2 and Fig. 3 explanation are used so that handle relevant to discern the alternative system of frame pattern and spectrum inversion state with the output of multicarrier (MC) processing from single carrier (SC) according to an embodiment.
In Fig. 2, independent SC/MC detector (29) and system information and frame mode detector (23) parallel work-flow.Independent SC/MC detector (29) (is for example determined the SC/MC pattern, use is based on the detector of peak-to-average power ratio (PAPR)), with control multiplexer (19), multiplexer (19) selects one from the output of single carrier (SC) processing module (17) and multicarrier (MC) processing module (15).System information and frame mode detector (23) are determined spectrum inversion state, interleaving mode, code check, QAM modulating mode etc., to control staggered module (21) and forward error recovery (FEC) module (25).
In Fig. 3, system information and frame mode detector (23) are operated afterwards at SC/MC detector (29).At multiplexer (19) after single carrier (SC) processing module (17) or multicarrier (MC) processing module (15) are selected correct output, system information makes the output of multiplexer (19) relevant with known system symbol sequence with frame mode detector (23), with the spectrum inversion state that is identified for controlling staggered module (21) and forward error recovery (FEC) module (25), interleaving mode, code check, QAM modulating mode etc.
The frame structure that Fig. 4 explanation can be used in receiver according to each embodiment.In Fig. 4, the frame of the signal that receives comprises data symbol (35) and system symbol, and system symbol comprises frame mode indicators number (31) and system information designated symbol (33).It is for instance, Chinese that (Digital Terrestrial MultimediaBroadcasting, standard GB 20600-2006 DTMB) have stipulated this frame structure that is used for hybrid SC and MC data transmission system at digital ground multimedia broadcast.In standard GB 20600-2006, frame pattern (for example SC or MC) is by 4 aiming symbol indications in the frame, and system information (SI) is indicated by 32 bit signs subsequently.
Consider following four data arrays that can produce from the output of SC processing module (17) and MC processing module (15).
1) D_F: do not have the equalization data (for example output of MC processing module (15)) in the frequency domain of spectrum inversion
2) D_F_inv: be applied to the equalization data in the frequency domain on the D_F with spectrum inversion
3) d_t: do not have the equalization data (for example, the output of SC processing module (15)) in the time domain of spectrum inversion
4) d_t_inv: be applied to the equalization data in the time domain on the d_t with spectrum inversion
According to the staggered table of the frequency domain of DTMB system, can obtain corresponding 36 system information symbol of above-mentioned four data arrays.One group of weight coefficient W1, W2, W3 and W4 can be applied to four possible system symbol sequences that detected, it is corresponding to D_F, D_F_inv, d_t and d_t_inv.In general, weight coefficient W1, W2, W3 and W4 are vectors, and its each corresponding 36 symbols at frame contain 36 weight coefficients.That is detected can be individually relevant with a plurality of known system symbol sequences through the weighting system symbol sebolic addressing.The known system symbol sequence that produces maximum related value is regarded as the system symbol sequence that detected; And produce one of maximum related value in the system symbol sequence that is detected (corresponding to D_F, D_F_inv, d_t and d_t_inv) and determine SC/MC pattern and frequency spectrum state.
For instance, when the correlated results of D_F_si is maximum, can determine that signal is in the MC pattern with spectrum inversion; When maximum, determining that signal is in the MC pattern with spectrum inversion from the correlated results of D_F_si_inv; When maximum, determining that signal is in the SC pattern with spectrum inversion from the correlated results of d_t_si; When maximum, determining that signal is in the SC pattern with spectrum inversion from the correlated results of d_t_si_inv.
When (for example DTMB system) uses identical modulation value system information at I and Q data in the SC pattern, such scheme can not detect the spectrum inversion state, because the signal of the signal of spectrum inversion and non-spectrum inversion will produce identical relevant output.In this case, can use other method (for example based on FEC method) to detect the frequency spectrum state.Yet, still can export to determine system information by the identification maximal correlation.
When with the signal correction that receives, different known system symbol sebolic addressings produces different relevant output.The known symbol sequence that produces maximal correlation output can be regarded as correct system symbol sequence.Therefore, maximal correlation between different editions by finding out the data that receive and the different known system symbol sebolic addressings, can determine system information (for example, demodulation modes, interleaving mode, code check) and frame information (for example, SC/MC pattern, spectrum inversion state) simultaneously.
In one embodiment, based on the symbol that receives in the individual data frame, carry out one-time detection.In another embodiment, use a plurality of Frames to detect frame information and system information.For instance, can repeatedly carry out detection based on the different pieces of information frame; And can carry out statistical analysis to indivedual testing results, to produce through improved result.
Fig. 5 A explanation is according to the block diagram example of the frame mode detector of an embodiment.In Fig. 5 A, will be provided to system symbol extractor (41 and 61) from the input that SC processing module (for example 17) and MC processing module (for example 15) receives, described system symbol extractor is based on detected frame boundaries extraction system symbol.
In Fig. 5 A, Q/I inversion module (45 and 65) produces the spectrum inversion version of institute's extraction system symbol.Correlation module (49,51,69,71) makes the spectrum inversion version of symbol that is extracted and the system symbol that is extracted relevant with predetermined weighting sequence (43,47,63,67).In the system information detector (49,51,69,71) each select to produce the known system symbol sebolic addressing through the maximum related value of weighting sequence with the different editions of the symbol that is extracted.System information detector (49,51,69,71) provides maximum related value S
o, S
i, M
oAnd M
i, it is the different editions of the symbol that extracts by making and relevant generation of known symbol sequence of optimum Match.Compare Logic (73) is based on finding out relevant output S
o, S
i, M
oAnd M
iIn maximal correlation output, determine inversion state and SC/MC pattern and system information.
For instance, when system information detector (49) when maximal correlation is provided, the signal that receives is regarded as being in the SC pattern with spectrum inversion; When system information detector (51) when maximal correlation is provided, the signal that receives is regarded as being in the SC pattern with spectrum inversion; When system information detector (69) when maximal correlation is provided, the signal that receives is regarded as being in the MC pattern with spectrum inversion; And when system information detector (71) when maximal correlation is provided, the signal that receives is regarded as being in the MC pattern with spectrum inversion.
Fig. 5 B explanation is according to the block diagram example of the system information detector of an embodiment.Illustrated system information detector (111) can be used as the detector (49,51,69 or 71) among Fig. 5 A among Fig. 5 B.
In Fig. 5 B, (for example weighting output (43,63 according to the weighting factor sequence for multiplier (113), 47 or 67)), come a version of the system symbol that weighting extracts, the output of for example output of system symbol extractor (41 or 61), or Q/I inversion module (45 or 65).By correlation module (121,123 ..., 125) and make the relevant with a plurality of known system symbol sequences of the system symbol that extracted through weighted version.Comparator (115) from correlation module (121,123 ..., 125) output in select maximum related value; And select to produce the known system symbol sebolic addressing of maximum related value as the system symbol that detects by detector (111).For instance, when correlation module (121) produced maximum related value, the employed known array A of correlation module (121) was regarded as the system symbol that detected.
Fig. 6 and Fig. 7 explanation are according to the block diagram example of the Compare Logic of each embodiment.
In Fig. 6, the big relevant output in the relevant output that comparator (81) and multiplexer (83) are selected to produce based on the result of single carrier (SC) processing module.When the version of spectrum inversion produced greatly as a result, multiplexer (83) was selected the relevant output of spectrum inversion; Otherwise, select the relevant output of non-spectrum inversion.
Similarly, the big relevant output in the relevant output of selecting to produce of comparator (85) and multiplexer (87) based on the result of multicarrier (MC) processing module.When the version of spectrum inversion produced greatly as a result, multiplexer (87) was selected the relevant output of spectrum inversion; Otherwise, select the relevant output of non-spectrum inversion.
Comparator (77) determines that whether correlated results from single carrier (SC) processing module is greater than the correlated results from multicarrier (MC) processing module.When from the correlated results of single carrier (SC) processing module greater than from the correlated results of multicarrier (MC) processing module the time, the signal that receives is in the SC pattern; Otherwise the signal that receives is in the MC pattern.
In Fig. 6, SC/MC signal controlling multiplexer (89) is with the designators as spectrum inversion in the output of selecting comparator (81 and 85).When being in the SC pattern, select the result of comparator (81), when it produces maximum result at the version from the result's of single carrier processing module spectrum inversion, indication spectrum inversion.When being in the MC pattern, select the result of comparator (85), when it produces maximum result at the version from the result's of multicarrier processing module spectrum inversion, indication spectrum inversion.
Fig. 7 explanation can be used for the Compare Logic in the system illustrated in fig. 2, wherein makes the SC/MC mode detection via independent detector (for example, 29).The SC/MC mode signal is selected the result from comparator (91 and 93), to indicate whether to exist spectrum inversion.When being in the SC pattern, select the result of comparator (91), when it produces maximum result at the version from the result's of single carrier processing module spectrum inversion, indication spectrum inversion.When being in the MC pattern, select the result of comparator (93), it produces big as a result the time at the version from the result's of multicarrier processing module spectrum inversion, indication spectrum inversion.
The Compare Logic that is used for system illustrated in fig. 3 can further be simplified, because multiplexer (19) has been selected correct result from SC processing module (17) and MC processing module (15).Can use comparator to compare and detect whether there is spectrum inversion based on output with the output of the output of non-spectrum inversion and spectrum inversion.
Fig. 8 shows the method for implementing according to an embodiment in receiver.In Fig. 8, the signal that receives from the radio-frequency module place produces (101) digital input signals.Based on single carrier wave, from digital input signals, extract (103) first data; And use a plurality of carrier waves from digital input signals, to extract (105) second data.Produce (107) a plurality of relevant outputs based on first and second data.Determine input signal delivery on the single carrier wave or on a plurality of carrier waves based on relevant output, and whether spectrum inversion has taken place in the input signal.
In above specification, provide the present invention with reference to particular exemplary embodiment of the present invention.To understand, under the situation that can in not breaking away from, be stated, the present invention be made various modifications than broad spirit and scope as appended claims.Therefore, specification and accompanying drawing should considered on the descriptive sense rather than on restrictive, sense.
Claims (20)
1. receiver, it comprises:
First signal processing unit, it extracts first data based on single carrier wave from input signal;
The secondary signal processing unit, it extracts second data based on a plurality of carrier waves from described input signal; And
The spectrum inversion detector, itself and the coupling of described first and second signal processing units are to determine in the described input signal whether spectrum inversion having taken place.
2. receiver according to claim 1, wherein said detector determine that further described input signal delivery is on the single carrier wave or on a plurality of carrier waves.
3. receiver according to claim 2, wherein said detector comprises:
First system information (SI) detector, it provides the first relevant output between described first data and the known system symbol sequence;
Second system information (SI) detector, its produce described first data through the second relevant output between inverted version and the known system symbol sequence;
Tertiary system system information (SI) detector, it produces the 3rd relevant output between described second data and the known system symbol sequence;
Quaternary system system information (SI) detector, its produce described second data through the 4th relevant output between inverted version and the known system symbol sequence; And
Logical block, its value with the described first, second, third and the 4th output compares, and determining whether described inversion to have taken place in the described input signal, and the delivery of described input signal is on the single carrier wave still on a plurality of carrier waves.
4. receiver according to claim 3 when wherein the bigger output in described third and fourth exports is greater than the bigger output in described first and second outputs, determines that described input signal delivery is on a plurality of carrier waves; When the bigger output in described third and fourth output during, determine that described input signal delivers on single carrier wave less than the bigger output in described first and second outputs.
5. receiver according to claim 4, wherein said first system information (SI) detector makes described first data individually relevant with a plurality of system symbol sequences to discern the first system symbol sequence, and the described first system symbol sequence produces described first output of the relevant output that produces greater than described a plurality of sequences of using except that described first sequence; And the described first system symbol sequence is identified as system symbol by described first data representation by described first system information (SI) detector.
6. receiver according to claim 1, it further comprises:
Multiplexer, the coupling of itself and described first and second processing units is with based on determining that described input delivery is on single carrier wave still on a plurality of carrier waves and select output from described first and second data; And
The release of an interleave module, itself and described multiplexer and the coupling of described detector, described detector is in order to definite interleaving mode from described first and second data, and described release of an interleave module is in order to come release of an interleave is carried out in the output of described multiplexer according to the described staggered module of being determined by described detector.
7. receiver according to claim 6, it further comprises:
The forward error recovery module, itself and described release of an interleave module and the coupling of described detector, described detector is in order to determining code check, and described forward error recovery module is estimated error from the data of described release of an interleave module recovery in order to use the determined described code check of described detector at least.
8. receiver according to claim 1, it further comprises:
Carrier detector, itself and described input are coupled, to determine that described input delivery is on the single carrier wave or on a plurality of carrier waves; And
Multiplexer, itself and described carrier detector are coupled, to select output from described first data and described second data.
9. receiver according to claim 8 wherein is provided as the described output of described multiplexer the input of described spectrum inversion detector.
10. receiver according to claim 9, wherein said spectrum inversion detector are further determined the pattern of code check, interleaving mode or quadrature amplitude modulation.
11. a receiver, it comprises:
Radio-frequency module;
Analogue-to-digital converters, itself and described radio-frequency module are coupled, to produce digital input signals the signal that receives from described radio-frequency module place;
First signal processing unit, it uses single carrier wave to extract first data from described digital input signals;
The secondary signal processing unit, it uses a plurality of carrier waves to extract second data from described digital input signals;
A plurality of system information detectors, itself and described first signal processing unit and the coupling of described secondary signal processing unit, with the recognition system symbol, and a plurality of relevant output that provides the system symbol that uses described identification and described first and second data to produce; And
Logical block, itself and described a plurality of system information detector are coupled, and with based on described relevant output, determine described input signal delivery on the single carrier wave or on a plurality of carrier waves, and whether spectrum inversion has taken place in the described input signal.
12. receiver according to claim 11, wherein said logical block are further determined the pattern of code check, interleaving mode and the quadrature amplitude modulation of the described signal that described radio-frequency module place receives.
13. receiver according to claim 11, it further comprises:
Multiplexer, itself and described first signal processing unit and the coupling of described secondary signal processing unit, with based on described input signal delivery on single carrier wave still on a plurality of carrier waves and selection from described first data and described second data; And
The forward error estimation module, the result of described logical block is confirmed in its output based on described multiplexer.
14. receiver according to claim 11, wherein said system information detector is used to make first system symbol that extracts from the frame of described first data relevant with first known symbol to produce the first relevant output, make through inverted first system symbol relevant with second known symbol to produce the second relevant output, make second system symbol that extracts from the frame of described second data relevant with the 3rd known symbol, make through inverted second system symbol relevant with the 4th known symbol to produce the 4th relevant output to produce the output of third phase pass.
15. receiver according to claim 14, wherein said logical block comprises:
First comparing unit, it is coupled to described system information detector, whether is correlated with output greater than the described second relevant output to determine described first, and selects the bigger output in described first and second relevant the outputs;
Second comparing unit, it is coupled to described system information detector, whether closes output greater than the described the 4th relevant output to determine described third phase, and selects the bigger output in the described third and fourth relevant output; And
The 3rd comparing unit, it is coupled to described first and second comparing units, to determine that whether described bigger output in the described first and second relevant outputs is greater than the described bigger output in the described third and fourth relevant output;
Wherein when the described bigger output in the described first and second relevant outputs during greater than the described bigger output in the described third and fourth relevant output, described logical block determines that described input signal delivery is on single carrier wave, when the described first relevant output is correlated with output greater than described second, spectrum inversion does not take place in the described input signal, and when the described first relevant output is correlated with output less than described second, spectrum inversion has taken place in the described input signal; And
Wherein when the described bigger output in the described first and second relevant outputs during less than the described bigger output in the described third and fourth relevant output, described logical block determines that described input signal delivery is on a plurality of carrier waves, when described third phase closes output greater than the described the 4th relevant output, spectrum inversion does not take place in the described input signal, and when described third phase closes output less than the described the 4th relevant output, spectrum inversion has taken place in the described input signal.
16. a method of implementing in receiver, it comprises:
The signal that receives from radio-frequency module produces digital input signals;
Based on single carrier wave, from described digital input signals, extract first data;
Use a plurality of carrier waves, from described digital input signals, extract second data;
Produce a plurality of relevant outputs based on described first and second data; And
Based on described relevant output, determine described input signal delivery on the single carrier wave or on a plurality of carrier waves, and whether spectrum inversion has taken place in the described input signal.
17. method according to claim 16, it further comprises:
Based on the delivery of described input signal on single carrier wave still on a plurality of carrier waves and selection from described first and second data; And
Based on described selected one forward errors of carrying out in described first and second data are estimated, check described definite result.
18. method according to claim 16, the described a plurality of relevant outputs of wherein said generation comprise:
Make first system symbol that extracts from the frame of described first data relevant, to produce the first relevant output with first known symbol;
Make through inverted first system symbol relevant with second known symbol, to produce the second relevant output;
Make second system symbol that extracts from the frame of described second data relevant, close output to produce third phase with the 3rd known symbol; And
Make through inverted second system symbol relevant with the 4th known symbol, to produce the 4th relevant output.
19. method according to claim 18, wherein when the bigger output in the described first and second relevant outputs during greater than the bigger output in the described third and fourth relevant output, determine that described input signal delivery is on single carrier wave, and whether determine greater than the described second relevant output whether spectrum inversion has taken place in the described input signal based on the described first relevant output, and
Wherein when the described bigger output in the described first and second relevant outputs during less than the described bigger output in the described third and fourth relevant output, determine described input signal delivery on a plurality of carrier waves, and close to export whether determine greater than the described the 4th relevant output whether spectrum inversion has taken place in the described input signal based on described third phase.
20. method according to claim 16, it further comprises:
Before the release of an interleave module, use the data that produced to determine the code check and the interleaving mode of described input signal.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103546400A (en) * | 2013-05-13 | 2014-01-29 | 上海数字电视国家工程研究中心有限公司 | Single-multiple carrier signal recognizing device, method and receiver |
| CN106656417A (en) * | 2016-10-27 | 2017-05-10 | 晶晨半导体(上海)有限公司 | Search device for solving problem concerning positive or negative frequency spectrum of single carrier |
| WO2017152870A1 (en) * | 2016-03-11 | 2017-09-14 | Huawei Technologies Co., Ltd. | Multicarrier uplink data with single carrier uplink control |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100689551B1 (en) * | 2001-06-18 | 2007-03-09 | 삼성전자주식회사 | Method and apparatus for transmitting and receiving in cdma mobile communication system |
| KR100652385B1 (en) * | 2004-11-11 | 2006-12-06 | 삼성전자주식회사 | Terrestrial digital video broadcasting receiver and method for detecting the spectrum inversion |
| CN1791192A (en) * | 2004-12-17 | 2006-06-21 | 三星电子株式会社 | Digital multimedia receiver and its digital multimedia receiving method |
| KR100755125B1 (en) * | 2006-06-13 | 2007-09-04 | 엘지전자 주식회사 | Equalizer for signal by both single carrier modulation and multi carrier modulation and method thereof |
| KR101233604B1 (en) * | 2006-07-04 | 2013-02-14 | 가부시키가이샤 히다치 고쿠사이 덴키 | Receiving apparatus |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103546400A (en) * | 2013-05-13 | 2014-01-29 | 上海数字电视国家工程研究中心有限公司 | Single-multiple carrier signal recognizing device, method and receiver |
| CN103546400B (en) * | 2013-05-13 | 2017-02-15 | 上海数字电视国家工程研究中心有限公司 | Single-multiple carrier signal recognizing device, method and receiver |
| WO2017152870A1 (en) * | 2016-03-11 | 2017-09-14 | Huawei Technologies Co., Ltd. | Multicarrier uplink data with single carrier uplink control |
| US10700836B2 (en) | 2016-03-11 | 2020-06-30 | Futurewei Technologies, Inc. | Multicarrier uplink data with single carrier uplink control |
| CN106656417A (en) * | 2016-10-27 | 2017-05-10 | 晶晨半导体(上海)有限公司 | Search device for solving problem concerning positive or negative frequency spectrum of single carrier |
| CN106656417B (en) * | 2016-10-27 | 2019-11-19 | 晶晨半导体(上海)股份有限公司 | A kind of searcher solving the positive and negative frequency spectrum of dtmb single carrier |
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