CN106031063B - Sending device, receiving device and its control method - Google Patents

Abstract

Disclose a kind of sending device.The sending device includes：Leading symbol inserter is configured as the leading symbol including signaling information being inserted into frame；Protection interval inserter is configured as multiple protection intervals being inserted into the both ends of leading symbol；Transmitter; it is configured as the frame that transmission includes leading symbol and the multiple protection interval; wherein, a protection interval in the multiple protection interval includes pseudo noise (PN) sequence and another protection interval includes one in PN sequences and a part for signaling information.Therefore; the individual algorithm of the size of FFT and protection interval for estimating leading symbol is not necessary; realized by being inserted into the PN sequences of protection interval healthy and strong signal detection with it is synchronous, and the compensation of the interference to generating under a multipath channel environment is considered being easier.

Description

Sending device, receiving device and its control method

Technical field

The device and method consistent with exemplary embodiment are related to a kind of sending device, receiving device and its control method, More particularly, it is related to a kind of sending device using orthogonal frequency division multiplexing (OFDM) scheme and receiving device and its controlling party Method.

Background technology

In recent years, broadcast communication services have had the feature of multi-functional, broadband and high quality.In particular, with electronics The movement of the high-end apparatus for receiving broadcasting and such as smart phone of the development of technology, such as high definition digital television (HDTV) Device or mancarried device are more and more universal, therefore various broadcast signal received methods for various broadcast services or for each The needs of the support of kind broadcast service have also increased.

As the example needed as satisfaction, such as second generation European terrestrial digital video broadcasting has been developed (DVB-T2) broadcast communication standard.DVB- has been used in 35 or more the countries in the whole world including Europe T2.DVB-T2 is by applying newest technology (such as, low-density checksum (LDPC) coding method, 256 quadrature amplitude modulations (QAM) method etc.) realize increase and the high bandwidth efficiency of transmission capacity, therefore DVB-T2 can provide such as with limited frequency band The service of the various high quality of HDTV.

Multiple P2 symbols of the T2 frames by using a P1 symbol and including signaling information for DVB-T2 overcome greatly The signaling information of amount is redundantly inserted into the problem of all symbols.

Invention content

Technical problem

However, even if successfully being detected signal by P1 symbols, as being decoded required information to P2 symbols Protection interval is still unknown, it is therefore desirable to the individual algorithm of the size for estimating protection interval.

Therefore, it is necessary to including a large amount of signaling informations and realize strong simultaneously operating and channel estimation leading symbol knot Structure.

Solution

Exemplary embodiment can overcome disadvantage mentioned above and other disadvantages not described above.It should be understood, however, that exemplary reality Disadvantages mentioned above need not be overcome by applying example, and can not be overcome the problems, such as any of above.

Exemplary embodiment is related to a kind of hair at the both ends that the protection interval including predetermined sequence is inserted into leading symbol Send equipment and receiving device and its control method.

Accoding to exemplary embodiment, a kind of sending device is provided, the sending device may include：Leading symbol is inserted into Device is configured as the leading symbol including signaling information being inserted into frame；Protection interval inserter, being configured to will be more A protection interval is inserted into the both ends of leading symbol；Transmitter, it includes leading symbol and the multiple protection to be configured as sending The frame at interval a, wherein protection interval in the multiple protection interval includes pseudo noise (PN) sequence and another Protection interval includes one in PN sequences and a part for signaling information.

The protection interval for being inserted into the front end of leading symbol may include PN sequences, be inserted into the protection of the rear end of leading symbol Interval includes one in PN sequences and a part for signaling information.

Protection interval inserter is also configured to generate size PN sequences identical with the size of leading symbol, and will production A part for raw PN sequences is inserted into each protection interval in the multiple protection interval or respectively by the PN sequence of generation The different piece of row is inserted into the multiple protection interval.

Protection interval inserter is also configured to generate the PN sequences with predefined size, and the PN sequences of generation are inserted Enter into leading symbol.

The PN sequences of generation can have size identical with leading symbol, wherein protection interval inserter can also be configured For the PN sequences of generation are reduced into predefined size, and the PN sequences after diminution are inserted into leading symbol.

The size of leading symbol or Fast Fourier Transform (FFT) (FFT) size can be 8K, be included between the multiple protection The size of the PN sequences in each protection interval in can be 3648 sampling points.

According to another exemplary embodiment, a kind of receiving device is provided, the receiving device may include：Receiver, quilt It is configured to the leading symbol for receiving data symbol including signaling information and the multiple protection intervals for being inserted into leading symbol both ends, Wherein, a protection interval in the multiple protection interval includes PN sequences and another protection interval includes PN sequences and letter Enable one in a part for information；Synchronizer is configured as mending based on the PN sequences being included in the multiple protection interval It repays leading symbol and executes synchronization；Channel estimator, the leading symbol after being configured as based on compensation execute channel estimation；Compensation Device is configured as at least one of a part and PN sequences based on the signaling information being included in the multiple protection interval To compensate inter-carrier interference/intersymbol interference (ICI/ISI)；Signal processor is configured as from channel estimator and compensator Output detect signaling information, and the data symbol being included in frame is handled based on the signaling information detected.

Synchronizer can be configured as being estimated based on the frequency shift (FS) of PN sequence pairs and sampling point offset, and the frequency based on estimation Rate is deviated and sampling point migration leading symbol and is executed synchronous.

The protection interval for being inserted into the front end of leading symbol may include PN sequences, be inserted into the protection of the rear end of leading symbol Interval includes one in PN sequences and a part for signaling information.

If each protection interval in the multiple protection interval includes PN sequences, compensator can be configured as removing PN sequences as interference signal, and compensate ICI/ISI. using a part for the signaling information of composition leading symbol

The size or FFT sizes of leading symbol are 8K, and the size of PN sequences can be 3648 sampling points.

According to another exemplary embodiment, a kind of method of control sending device is provided, the method may include：It will packet The leading symbol for including signaling information is inserted into frame；Multiple protection intervals are inserted into the both ends of leading symbol；Before transmission includes Lead the frame of symbol and the multiple protection interval, wherein a protection interval in the multiple protection interval includes PN sequences And another protection interval includes one in PN sequences and a part for signaling information.

The protection interval for being inserted into the front end of leading symbol may include PN sequences, be inserted into the protection of the rear end of leading symbol Interval may include one in PN sequences and a part for signaling information.

The step of being inserted into protection interval may include：Generate size PN sequences identical with the size of leading symbol；It will generate The parts of PN sequences be inserted into each protection interval in the multiple protection interval or respectively by the PN sequences of generation Different piece be inserted into the multiple protection interval.

The method may also include：Generate the PN sequences with predefined size；The PN sequences of generation are inserted into leading character In number.

The PN sequences of generation can have size identical with leading symbol, and the method may also include：By generation PN sequences narrow down to predefined size；And the PN sequences of diminution are inserted into leading symbol.

The size or FFT sizes of leading symbol can be 8K, institute in each protection interval in the multiple protection interval Including the sizes of PN sequences can be 3648 sampling points.

According to another exemplary embodiment, a kind of control method of receiving device is provided, the control method may include： Reception includes the leading symbol of data symbol including signaling information and the multiple protection intervals for being inserted into leading symbol both ends Frame a, wherein protection interval in the multiple protection interval includes PN sequences and another protection interval includes PN sequences With one in a part for signaling information；Simultaneously based on the PN sequences compensation leading symbol being included in the multiple protection interval Execute synchronization；Channel estimation is executed based on the leading symbol after compensation；Based on the signaling being included in the multiple protection interval At least one of part and PN sequences of information compensate ICI/ISI；From performing what channel estimation and ICI/ISI were compensated Leading symbol detects signaling information, and is handled the data symbol being included in frame based on the signaling information detected.

Synchronous step is executed to may include：Estimated based on the frequency shift (FS) of PN sequence pairs and sampling point offset, and is based on estimating The frequency shift (FS) of meter and sampling point migration leading symbol simultaneously execute synchronous.

The protection interval for being inserted into the front end of leading symbol may include PN sequences, be inserted into the protection of the rear end of leading symbol Interval includes one in PN sequences and a part for signaling information.

As described above, according to various exemplary embodiments, FFT sizes and protection interval for estimating leading symbol it is big Small additional algorithm is not necessary, and healthy and strong signal detection and same is realized by being inserted into the PN sequences of protection interval Step, and compensate the interference generated under a multipath channel environment and become easy.

Advantageous effect

Description of the drawings

Exemplary embodiment is described in detail by referring to accompanying drawing, above and/or other aspects will be apparent from, wherein：

Fig. 1 is the block diagram for the configuration for showing sending device accoding to exemplary embodiment；

Fig. 2 is the frame for the configuration for showing 3.0 system of the Advanced Television System committee (ATSC) accoding to exemplary embodiment Figure；

Fig. 3 is the frame for the configuration for showing the signaling generation equipment used by 3.0 systems of ATSC accoding to exemplary embodiment Figure；

Fig. 4 is the block diagram of the configuration for describing DVB-T2 systems accoding to exemplary embodiment.

Fig. 5 is the block diagram of the configuration for describing generation signaling information accoding to exemplary embodiment.

Fig. 6 is the block diagram for the detailed configuration for showing OFDM waveform generators accoding to exemplary embodiment.

Fig. 7 shows the structure of leading symbol accoding to exemplary embodiment.

Fig. 8-Figure 10 shows leading symbol accoding to exemplary embodiment and protection interval.

Figure 11 is the diagram for the structure for showing leading symbol according to another exemplary embodiment.

Figure 12 and Figure 13 is the diagram for describing the method for being inserted into PN sequences accoding to exemplary embodiment.

Figure 14 and Figure 15 is showing for the processing for generation leading symbol accoding to exemplary embodiment to be more fully described Figure.

Figure 16 is the block diagram for the configuration for showing receiving device accoding to exemplary embodiment.

Figure 17 is the block diagram for the detailed configuration for showing receiving device accoding to exemplary embodiment.

Figure 18 and Figure 19 be and accoding to exemplary embodiment for compensating the relevant diagram of method of ICI/ISI.

Figure 20 is the block diagram for the configuration for showing receiving device according to another exemplary embodiment.

Figure 21 is the block diagram for signal processor accoding to exemplary embodiment to be described in detail.

Figure 22 is the block diagram for the detailed configuration for showing signal processor accoding to exemplary embodiment.

Figure 23 is the flow chart of the control method for describing sending device accoding to exemplary embodiment.

Figure 24 is the flow chart of the control method for describing receiving device accoding to exemplary embodiment.

Realize the optimal mode of the present invention

Specific implementation mode

Hereinafter, with reference to the accompanying drawings to exemplary embodiment is more fully described.

In the following description, when identical label is depicted in different drawings, identical label is for identical Element.The content (such as, detailed configuration and element) being defined in is provided to help comprehensive understanding exemplary embodiment. It is therefore evident that exemplary embodiment can be executed in the case of the content being specifically defined without those.Further, since existing There are known function or element in technology to obscure exemplary embodiment in terms of unnecessary details, therefore is not described in detail known Function or element.

Fig. 1 is the block diagram for the configuration for showing sending device accoding to exemplary embodiment.

According to Fig. 1, sending device 100 includes leading symbol inserter 110, protection interval inserter 120 and transmitter 130。

Leading symbol including signaling information is inserted into frame by leading symbol inserter 110.Here, signaling information includes What be will be explained in greater detail later is decoded data symbol required at least one parameter.In addition, in leading symbol inserter Before 110 are inserted into leading symbol in frame, by also by the composition Advanced Television System committee explained in detail below (ATSC) the structure (not shown) of 3.0 systems generates the frame.

Protection interval is inserted into the both ends of leading symbol by protection interval inserter 120.Here, protection interval instruction is inserted Enter the section to avoid the interference between adjacent signal or symbol.Size depending on Fast Fourier Transform (FFT) (FFT) can be The size of 8K, 16K or 32K, protection interval can be different.However, the size of leading symbol can be fixed as according to exemplary reality The preset value of example is applied, correspondingly, the protection interval for all having fixed size can be inserted into leading character by protection interval inserter 120 Number both ends.

One of the protection interval at both ends for being inserted into leading symbol may include pseudo noise (PN) sequence, between another protection One in a part for the signaling information that may include PN sequences and be included in leading symbol.

In other words, each protection interval being inserted into the protection interval at the both ends of leading symbol may include PN sequences It arranges, or one of the protection interval at both ends for being inserted into leading symbol may include PN sequences and another protection interval may include PN sequences and one of the part for signaling information being included in leading symbol

The transmission of transmitter 130 includes leading symbol and the frame of protection interval.Between above-mentioned leading symbol inserter 110, protection It may include that the OFDM waveform generators in 3.0 systems of ATSC explained below (do not show every inserter 120 and transmitter 130 Go out) and structure (not shown) in.

Fig. 2 is the block diagram for the configuration for showing 3.0 systems of ATSC accoding to exemplary embodiment.

With reference to Fig. 2,3.0 systems 200 of ATSC may include input processor 210, Bit Interleaved Coded Modulation (BICM) coding Device 220, architecture processor 230 and transmitter 240.

Multiple input stream is divided into multiple base band frames by input processor 210.Specifically, the output of input processor 210 packet Include at least one physical layer pipe (PLP) of multiple base band frames.

As exemplary embodiment, DVB-T2 systems have difference using PLP concepts to be provided by a broadcast channel Modulator approach, different channel encoding rates, different time and unit (cell) weaving length etc. various broadcast services.

PLP refers to the single path being processed independently.That is, can by multiple radio frequencies (RF) channel come send and/ Or various services (for example, video, extending video, audio, data flow etc.) are received, and PLP is to send the service by it Path or passage path send stream.It is distributed according to time interval in the gap of multiple RF channels in addition, PLP can be located at, Or PLP can be distributed according to time interval on a RF channel.That is, PLP can be distributed in one according to time interval On RF channels or on multiple RF channels and sent.

PLP structures are constituted by providing the input pattern A of a PLP and providing the input pattern B of multiple PLP.Specifically It says, when supporting input pattern B, it is possible to provide strong special services, and a stream is also sent in a distributed way.Therefore, Time-interleaved length can be increased, and can get time diversity gain.In addition, when only receiving specific stream, difference is being received Stream when can close receiving device and reduced power consumption.Therefore, this can be suitable for the broadcast service for portable mobile device.

Here, time diversity refers to sending same signal several times according to specified time interval to inhibit to pass in sending side The deterioration of transmission quality, and these signals are synthesized again to obtain good transmission quality in receiving side.

The information sent jointly in multiple PLP may include in a PLP and be sent to increase efficiency of transmission.PLP0 The function is can perform, common PLP is referred to alternatively as.The remaining PLP that can be used for transmission data in addition to PLP0 is referred to alternatively as data PLP。

It can receive HDTV services when using these PLP, at fixing device at home, and about the mark of same program Quasi- definition television (SDTV) service is provided to portable mobile device on the move.In addition, can be by broadcasting station or wide It broadcasts content supplier and various broadcast services is supplied to spectators, and can also receive such service in the edge region.

That is, input processor 110 by the data sent being mapped at least one signal processing path to produce Raw base band frame, and execute signal processing for each path.For example, signal processing may include input signal synchronization, delay compensation, Invalid package is deleted, cyclic redundancy check (CRC) coding, head insertion, encoded, interweaving and at least one of modulation processing. Later, a transmission frame is generated as together with signaling information for the base band frame through signal processing in path, and generate Transmission frame is sent to receiving device (not shown).

BICM encoders 220 execute forward error correction coding (FEC) to multiple base band frames, and execute constellation mapping and intertexture, And export multiple interleaved base band frames.

In particular, when the base band frame of multiple randomizations is input into BICM encoders 220, multiple base band frames are encoded For Bose, Chaudhuri and Hochquenghem (BCH) code, it is then encoded as low-density checksum (LDPC) code.Pass through Bit interleaver is interleaved the base band frame of multiple codings, and according to quadrature phase shift keying (QPSP), 16-QPSK or more The bit map that the constellation size of high QAM will interweave is to constellation symbol.The multiple frames generated in this way are referred to alternatively as Forward error correction (FEC) frame.Then, fec frame is interleaved by time.

Signaling information is added to the multiple base band frames exported from BICM decoders 220 to generate by architecture processor 230 OFDM symbol.

In particular, architecture processor 230 by through time-interleaved base band frame scheduling be data cell stream.Then, exist Data cell is interleaved on frequency domain.ATSC3.0 frames are generated from the data cell to interweave on frequency domain.Next, being referred to as The physical layer signaling of L1 signalings is inserted into the starting of 3.0 frames of each ATCS as the leading symbol with 8K FFT sizes Point.L1 signalings are used for the Fast synchronization of each frame.

The leading symbol inserter 110 of Fig. 1 may include in above structure processor 230, be included in leading symbol Signaling information can be L1 signalings.

In addition, the leading symbol including L1 signaling informations can be inserted into architecture processor by leading symbol inserter 110 The starting point of 3.0 frames of ATSC generated in 230.

Thereafter, OFDM waveform generators 240 execute inverse FFT (IFFT) behaviour for 3.0 frames of ATSC for inserting leading symbol Make, and is transformed into the signal of time domain.In order to avoid the interference between symbol, protection interval is inserted by OFDM waveform generators 240 Base-band analog signal is generated to each symbol and by executing digital-to-analogue conversion for the signal of time domain, and sends the signal.

Specifically, OFDM waveform generators 240 are typically based on FFT sizes and protection interval part (fraction) to select At least one of multiple pilot patterns, and inserted pilots into OFDM symbol according to the pilot pattern of selection, and send packet Include the stream of the OFDM symbol inserted with pilot tone.

CP continuous pilot and scattered pilot are inserted into together with data cell in 3.0 frames of ATSC by OFDM waveform generators 240. Therefore, pilot tone can be used to execute channel estimation and correcting frequency shift in receiving device (not shown).It is optionally inserted into and uses In the tone (tone) for the reservation for reducing peak-to-average force ratio (PAPR).

Specifically, it is for reference information known to receiving device by the various cells modulates for being inserted into 3.0 frames of ATSC. There is the information sent by these units such as dispersion, continuous, edge (edge), frame to start (frame-start) or frame pass Close the format of (frame-closing) pilot tone.

The protection interval inserter 120 and transmitter 130 of Fig. 1 may include in above-mentioned OFDM waveform generators 240.Together When, the protection interval with fixed size can be inserted into the leading symbol with default size by protection interval inserter 120 Both ends.

It includes PN sequences that at least one of protection interval at both ends of leading symbol is inserted by protection interval inserter 120 Row, need not will be inserted into leading symbol for the individual pilot signal of channel estimation.

Here, the instruction of pseudo noise (PN) sequence is with the feature similar with random noise and with the sequence of specific rule Row, and pseudo-random sequence is frequently used for the mobile communication using spread spectrum communication.The PN sequences should be able to be easy in PN generators Ground generates long length sequence and quickly executes initial synchronisation in the position of mobile communication terminal.

In other words, PN has the function of being used as identifier, therefore, is present in leading character when PN sequences are inserted into When the protection interval at number both ends, receiving device (not shown) can detect leading symbol, and PN sequences is leading for detecting The synchronization of symbol and channel estimation.As a result, it is not necessary that before being inserted into the additional pilot signal for channel estimation Lead symbol.

In addition, if pilot signal is not inserted into leading symbol, the section that can store signaling information can be further Increase.For example, compared with the P2 symbols of DVB-T2 for including the pilot signal being inserted into using the interval of Dx=3, for storing letter Enable the section of information that can increase by percent 30.

Therefore, protection interval inserter 120 can be by will include that the protection interval of PN sequences is inserted into the two of leading symbol Improve data transmission efficiency at least one of end.

Fig. 3 is the frame for the configuration for showing the signaling generation equipment used by 3.0 systems of ATSC accoding to exemplary embodiment Figure.

With reference to Fig. 3, it includes signaling generator 310, signaling BICM encoders 320, frequency interleaver that signaling, which generates equipment 300, 330 and leading generator 340.

It is various types of in data symbol region to being included in that signaling generator 310 generates receiving device (not shown) PLP is decoded required all signaling informations.In addition, signaling generator 310 can will be relevant with emergency alert system (EWS) Data are inserted into signaling information.In addition, receiving device (not shown) can be detected by simply handling leading symbol about EWS Data.

Signaling BICM encoders 320 and frequency interleaver 330 are respectively bitwise and as unit of frequency to generating Signaling information be interleaved, and leading generator 340 generate and export the leading symbol for including interleaved signaling information.

Fig. 4 is the block diagram for the configuration for showing DVB-T2 systems accoding to exemplary embodiment.

With reference to Fig. 4, DVB-T2 Transmission systems 1000 may include that input processor 1100, BICM encoders 1200, frame create Device 1300 and modulator 1400.

Described in the configuration of DVB-T2 Transmission systems 1000 and the DVB-T2 as one of European digital broadcast standard Configuration it is identical, therefore will be briefly described the configuration of DVB-T2 Transmission systems 1000.Details can refer to " digital video broadcasting (DVB)；Frame structure Channel Coding and Modulation for second generation Digital Terrestrial Television Broadcast system (DVB-T2) ".

Input processor 1100 generates base band frame from for by the inlet flow of the data serviced.Here, inlet flow can be with It is mpeg 2 transport stream (TS), general stream (TS) etc..

BICM encoders 1200 by the region being sent to according to by the data serviced by determining FEC encoding rates and star Seat sequentially executes coding (fixed PHY frames or mobile PHY frames).For can be by independent by the signaling information of the data serviced BICM encoders (not shown) to encode or by being compiled to the BICM encoders 1200 for handling the data serviced Code.

Frame creator 1300 and modulator 1400 are determined for the OFDM parameters of signaling area and the number for will be serviced , with component frame, and retaining zone is added to the frame of composition according to by the OFDM parameters of the data area sent, and generates frame.It connects Get off, executes the modulation for the frame of generation to be modulated to radio frequency (RF) signal, and RF signals are sent to receiving device and (are not shown Go out).

As described in fig. 2, the input processor 210 of composition 3.0 systems 200 of ATSC, BICM encoders 220, structure Processor 230 and OFDM waveform generators 240 can correspond respectively to the input processor 1100, BICM encoders 1200, frame of Fig. 4 Creator 1300 and modulator 1400.Equally, the operation executed by leading symbol inserter 110 such as in Fig. 1 can be created by frame The execution of device 1300 is built, the operation executed by protection interval inserter 120 and transmitter 130 can be executed by modulator 1400.

Fig. 5 is the block diagram of the configuration for describing generation signaling information accoding to exemplary embodiment.

Specifically, accoding to exemplary embodiment, Fig. 5 shows to generate the L1 used by the DVB-T2 Transmission systems 1000 of Fig. 4 The configuration of signaling information, but can be to generate equipment 300 with applied to the signaling for 3.0 systems 200 of ATSC in Fig. 2 Handle the processing that identical mode application generates L1 signaling informations.

In fig. 5 it is shown that the input processor 1110 and BICM that are included in the DVB-T2 Transmission systems 1000 of Fig. 4 are compiled Code device 1200.Input processor 1100 may include scheduler 1110.BICM encoders 1200 may include L1 signaling generators 1210, FEC encoder 1220-1 and 1220-2, bit interleaver 1230-2, demultiplexer 1240-2 and constellation mapper 1250-1 and 1250-2.BICM encoders 1200 may also include time interleave (not shown).L1 signaling generators 1210 may include inputting Processor 1100 rather than in BICM encoders 1200.

N service data is mapped to PLP0 to PLPn.Scheduler 1110 determine position, modulation and the code check of multiple PLP with PLP is mapped to the physical layer of T2 frames.That is, scheduler 1110 generates L1 signalings.In some cases, scheduler 1110 The multidate information of the rear L1 signalings of present frame can be output to frame creator 1300.L1 signalings can be sent to by scheduler 1110 BICM encoders 1200.L1 signalings include preceding L1 signalings and rear L1 signalings.

L1 signaling generators 1210 are generated in a manner of differentiation and export preceding L1 signalings and rear L1 signalings.FEC encoder 1220-1 and 1220-2 executes the FEC for including to shorten and punch to preceding L1 signalings and rear L1 signalings respectively and encodes.Bit interleaver 1230-2 bitwise executes intertexture to the rear L1 signalings of coding.The bit of demultiplexer 1240-2 control component units Sequence is with control bit robustness, and output includes the unit of the bit.Two 1250-1 and 1520-2 points of constellation mappers Not by preceding L1 signalings and rear L1 protocol mappings to planisphere.The preceding L1 signalings and rear L1 signalings handled by above-mentioned processing is defeated Go out to frame creator 1230.Therefore, preceding L1 signalings and rear L1 signalings can be inserted into frame.

Equipment 300 can be generated by the signaling of Fig. 3 executes the processing for generating L1 signalings in an identical manner.

Fig. 6 is the block diagram for the detailed configuration for showing OFDM waveform generators accoding to exemplary embodiment.

With reference to Fig. 6, OFDM waveform generators 240 include tone retain and pilot generator 241, unit multiplexed device 242, IFFT processors 243, PAPR reducers 244, protection interval inserter 245, spectral shaper 246 and digital-to-analogue (D/A) converter 247。

Tone retain and pilot generator 241 and unit multiplexed device 242 by multiplexing by CP continuous pilot and scattered pilot and Data cell is inserted into together in 3.0 frames of ATSC.Therefore, pilot tone can be used to execute channel estimation for receiving device (not shown), and Correcting frequency shift.Tone reservation can be selectively used for reducing PAPR.

3.0 frames of ATSC inserted with pilot tone and the tone of reservation are converted to the signal of time domain by IFFT processors 243.

PAPR reducers 244 calculate the size of PAPR pilot tones to reduce PAPR sizes from the signal of transformed time domain.Tool Body, PAPR is the reference for indicating influence of the baseband signal for sending device 100, refers to peak power and mean power Ratio.That is, the power of sending device 100 typically refers to mean power.However, peak power is present in practical transmission Power in, if not being suitably designed peak power, peak power cause inter-modulation so that broadcasting-quality deteriorate.Cause This, sending device 100 must send broadcast singal in such a way that PAPR is reduced.

Then, protection interval is inserted into each of the signal exported from PAPR reducers 244 by protection interval inserter 245 Symbol is to avoid the interference between symbol.

Spectral shaper 246 can execute filtering to make neighbouring transmission letter to the signal exported from protection interval inserter 245 Minimum interference between road.Specifically, it is proposed that be filtered with improve frequency spectrum shaping and after ofdm signal is generated It is accurately distinguished between neighbouring transmission channel.The impulse response for being commonly used for the filtering of frequency spectrum shaping reduces the length of useful signal Degree, therefore filter length needs are reduced.However, without the flat filter necessarily high-grade filting of ripple (ripple) Device.Therefore, it in order to shorten filter length and make the minimization of loss at effective protection interval, needs to shorten the same of filter length When to ofdm signal execute effective spectrum shaping.

The signal for foring frequency spectrum can be converted to analog signal by D/A converter 247.

Accoding to exemplary embodiment, in the detailed configuration for the OFDM waveform generators 240 being shown in FIG. 6, protection interval Inserter 245 and D/A converter 247 are corresponding with protection interval inserter 120 shown in Fig. 1 and transmitter 130, and in order to The interference between symbol is avoided, and protection interval can be inserted by protection interval inserter 120 and the execution of transmitter 130 has The operation of each symbol of the PAPR of reduction and the operation that the signal for forming frequency spectrum is converted to analog signal and is transmitted.

Up to the present, it has been described that a part, 100 leading symbol inserter of sending device with 3.0 systems of ATSC 110, shown in 130 corresponding Fig. 2 of protection interval inserter 120 and transmitter 3.0 systems 200 of ATSC whole configurations and The all operationss executed by leading symbol inserter 110, protection interval inserter 120 and transmitter 130.In detail, it will describe Leading symbol accoding to exemplary embodiment and protection interval.

Fig. 7 is the diagram for the structure for showing leading symbol accoding to exemplary embodiment.With reference to Fig. 7, leading symbol 710 wraps Include the signaling information for being decoded to data.When signaling information is inserted into each symbol, expense occurs, therefore, In order to reduce such expense, the leading symbol for being inserted into the beginning of frame includes signaling information, and leading symbol 710 can be The size of 8K FFT.In addition, can be by the method for such as BPSK, QPSK, 16QAM, 64QAM and 256QAM come leading to being inserted into The signaling information of symbol 710 is modulated.

Fig. 8-Figure 10 is the diagram for describing leading symbol and protection interval accoding to exemplary embodiment.

With reference to Fig. 8, a leading symbol 710 includes for handling the entire signaling for including data symbol in a frame Information, and such signaling information includes that required parameter is decoded to data symbol, therefore, the stalwartness of leading symbol Decoding is necessary.

Therefore, it can will includes PN sequences to be used for healthy and strong signal detection and the protection interval inserter 120 (Fig. 1) of initial synchronisation The protection interval 720 of row is inserted into the front end of leading symbol 710.

In front end the leading symbol 710 inserted with the protection interval 720 including PN sequences with with cyclic prefix (CP) the different structure of the data symbol of-OFDM structures, therefore led due to inter-carrier interference/intersymbol interference (ICI/ISI) Performance deterioration can occur in multi-path channel environment for the interference of cause.

Therefore, suffix (that is, protection interval) can be inserted into the rear end of leading symbol 710 by protection interval inserter 120.

Here, it is inserted into the front end for being inserted into leading symbol 710 among the protection interval at the both ends of leading symbol 710 Protection interval 710 includes PN sequences, the letter that the protection interval for being inserted into rear end may include PN sequences and be included in leading symbol Enable one in a part for information.

Specifically, protection interval is inserted into the following institute of method of the rear end of leading symbol by protection interval inserter 120 Show.

With reference to Fig. 9, the protection interval 720 including PN sequences can be inserted by protection interval inserter 120 to be believed including signaling The front end of the leading symbol 710 of breath, and the rear end for leading symbol 710 being inserted into including the protection interval 730 of PN sequences.This In, the PN sequences for being inserted into the front-end and back-end of leading symbol 710 can be the same or different from each other.

Fig. 9 instruction leading symbols 710 and the protection interval 720 and 730 for being inserted into both ends are indicated as leading symbol.For It is more accurate, including the section 710 of signaling information is leading symbol, but in DVB-T2 systems, further include protection interval Section is counted as P1 symbols, and therefore, including the section of all protection intervals 720 and 730 is seen as leading symbol.

One of data in the reproducible each data symbol being included in multiple data symbols of protection interval inserter 120 The data are simultaneously inserted into the protection interval for the front end for being inserted into each symbol by part.A part for data is inserted into often The frame structure of the front end of a data symbol is indicated as cyclic prefix (CP)-OFDM structures.

Referring to Fig.1 0, the protection interval 720 including PN sequences can be inserted by protection interval inserter 120 to be believed including signaling The part 740 for being included in the signaling information in leading symbol 710 is replicated, and signaling is believed in the front end of the leading symbol 710 of breath The part 740 of the duplication of breath is inserted into the protection interval 740-1 for the rear end for being inserted into leading symbol 710.

As described above, the part 740 for being inserted into the signaling information of the rear end of leading symbol 710 is referred to as cyclic suffix.

In addition, in the reproducible each data symbol being inserted into multiple data symbols of protection interval inserter 120 A part for data, and by the protection interval for being inserted partially into the front end for being inserted into each data symbol of the duplication of data In.

In the case where the length of frame is assumed maximum 250ms, be inserted into the rear end of leading symbol 710 PN sequences or Cyclic suffix is corresponding with as 0.2% 0.532ms of frame, therefore, is inserted into the PN sequences of the rear end of leading symbol 710 or follows The expense of ring suffix is not significant grade, therefore negligible.

PN sequences with default size can be inserted into leading symbol 710 by protection interval inserter 120.Specifically, As follows referring to Fig.1 1.

Figure 11 is the diagram for the structure for showing leading symbol according to another exemplary embodiment.

Referring to Fig.1 1, insert the protection interval 720 and 730 including PN sequences at the both ends of leading symbol 710, and In leading symbol 710, signaling information and PN sequences 750 are inserted.

In other words, in multi-path channel environment, if the delay section of the signal of each channel is longer than protection interval, Receiving device (not shown) can not fully execute channel estimation using only the PN sequences of the front end of leading symbol 710, therefore, PN sequences with default size are also inserted into leading symbol 710 by protection interval inserter 120.

Receiving device (not shown) can be come by using the PN sequences with default size being inserted into leading symbol 710 Execute channel estimation.

Therefore, leading symbol accoding to exemplary embodiment can have there are two structure.Specifically, such knot is provided Structure：The both ends of leading symbol 710 are inserted with the protection interval for including PN sequences, in leading symbol 710, inserted with default The PN sequences of size.

Provide another structure：In the front end of leading symbol 710 inserted with the protection interval for including PN sequences, it is included in The protection interval of a part for included signaling information is inserted into rear end in leading symbol 710, has the PN of default size Sequence is inserted into leading symbol 710.

It is inserted inserted with the protection interval including PN sequences and in leading symbol 710 for the both ends of leading symbol 710 Entering has the structure of the PN sequences with default size, protection interval inserter 120 that can be inserted into PN sequences by following two methods Row.

Figure 12 and Figure 13 is the diagram for describing the method for being inserted into PN sequences accoding to exemplary embodiment.

Protection interval inserter 120 can generate the PN sequences with size identical with the size of leading symbol 710, and will A part for the PN sequences of generation is inserted into each protection interval at the both ends for being inserted into leading symbol 710, or will generate Different being inserted partially into of PN sequences be inserted into the protection interval at both ends.

In addition, protection interval inserter 120 can generate size PN sequences identical with the size of leading symbol 710, will produce Raw PN sequences are reduced into predefined size, and the PN sequences of diminution are inserted into leading symbol 710.

Referring to Fig.1 2, protection interval inserter 120 can generate size PN sequences identical with the size of leading symbol 710 10, the part 20 among the PN sequences 10 of generation is replicated, and the part of duplication 20 is inserted into and is inserted into leading symbol 710 Each of the protection interval 720 and 730 at both ends.That is, be inserted into protection interval 720 and 730 PN sequences that This is identical, wherein protection interval 720 and 730 is inserted into the both ends of leading symbol 710.

Identical with the leading symbol 710 PN sequences of size 10 can be reduced into predefined size by protection interval inserter 120, and PN sequences 750 with predefined size can be inserted into leading symbol 710.

Specifically, protection interval inserter 120 will reduce factor Q and size PN identical with the leading symbol 710 of generation Sequence 10 is multiplied, and the output valve from product is added with the signaling information being inserted into leading symbol 710.

Referring to Fig.1 3, protection interval inserter 120 can generate size PN sequences 10 identical with leading symbol 710, replicate Different piece 20 and 30 among the PN sequences 10 of generation, and the part of duplication 20 and 30 is inserted into protection interval 720 respectively With 730, wherein protection interval 720 and 730 is inserted into the both ends of leading symbol 710.In other words, it is inserted between protection PN sequences every 720 and 730 are different from each other, wherein protection interval 720 and 730 is inserted into the both ends of leading symbol 710.

In addition, protection interval inserter 120 identical with the leading symbol 710 PN sequences of size 10 can be reduced into it is predetermined big It is small, and the PN sequences 750 with predefined size can be inserted into leading symbol 710.In an identical manner, it is inserted in protection interval Enter device 120 will reduce factor Q with after being multiplied with the PN sequences 10 of the 710 identical size of leading symbol of generation, future It is added from the output valve of product with the signaling information being inserted into leading symbol 710.

Here, the size of leading symbol 710 can be 8K, and the size for being inserted into the PN sequences of protection interval can be 3648 A sampling point, wherein protection interval is inserted into the both ends of leading symbol 710.As described above, the size when leading symbol and protection When the size at interval has fixed value, for estimating that the additional algorithm of the fixed value is not necessary, therefore, data will be improved Transmission rate and efficiency.

The PN sequences of generation are reduced into predefined size and by the PN sequences with predefined size by protection interval inserter 120 It is inserted into leading symbol.The operation is executed in time domain, and the operation and is inserted pilots into leading symbol in frequency domain DVB-T2 is different.

Figure 14-Figure 15 illustrates in greater detail the processing of generation leading symbol accoding to exemplary embodiment.

Figure 14 shows that the size generated from leading symbol generator 110 is the leading symbol 810 of 8K, and with dotted line leading The both ends of symbol 810 indicate the section 811 and 812 that the protection interval of 3648 sampling point sizes will be inserted into.

Protection interval inserter 120 generate identical with the leading symbol 810 two PN sequences 820 of size and 840 (that is, 8K), using reduce factor Q part 830 and 850 in each of the PN sequences 820 of generation and 840 generate prefix 830-1 and 850-1 and suffix 830-2 and 850-2.

Whether in addition, being inserted into according to about 860 data of emergency alert system (EWS), protection interval inserter 120 selects One of PN sequences 820 of generation and 840, and the PN sequences of selection are merged into leading symbol 810.Therefore, including it is identical The protection interval of PN sequences is inserted into the both ends of leading symbol, the PN sequences with size predefined size identical with leading symbol A part for row is inserted into leading symbol.

Figure 15 shows the leading symbol 901 of the 8K sizes generated from leading symbol generator 110, and in the leading character of generation Numbers 910 both ends indicate the section 911 and 912 that the protection interval of 3648 sampling point sizes will be inserted into dotted line.

In addition, protection interval inserter 120 generate with two PN sequences 920 identical with 910 size of leading symbol and 950.In addition, protection interval inserter 120 from the different piece 930 and 940 of a PN sequence 920 by using reducing factor Q To generate prefix 930-1 and suffix 940-1.

In addition, protection interval inserter 120 from the different sections 960 and 970 of another PN sequences 950 by using diminution Factor Q generates prefix 960-1 and suffix 970-1.

Whether in addition, being inserted into according to emergency alert system (EWS) (980) relevant data, protection interval 120 selects One of PN sequences 920 of generation and 950, and the PN sequences of selection are merged into leading symbol 910.Including PN sequences therefore, The protection intervals of different sections be respectively inserted into the both ends of leading symbol, and size PN sequences identical with leading symbol Row are partially inserted into leading symbol.

Figure 16 is the block diagram for the configuration for showing receiving device accoding to exemplary embodiment.

According to Figure 16, receiving device 1600 includes receiver 1610, synchronizer 1660, channel estimator 1620, compensator 1630 and signal processor 1640.

The reception of receiver 1610 includes the frame of at least one data symbol and leading symbol.Leading symbol includes signaling information With the protection interval at the both ends for being inserted into leading symbol.Here, one of the protection interval being included in the both ends of leading symbol Including PN sequences, another protection interval includes one in PN sequences and a part for signaling information.

Here, the protection interval for being inserted into the front end of leading symbol includes PN sequences, is inserted into the rear end of leading symbol Protection interval include PN sequences and a part for signaling information.

Synchronizer 1660 can be based on being included at least one of protection interval PN sequences compensation leading symbol and execute same Step.Specifically, synchronizer 1660 can be based at least one PN sequence estimations frequency shift (FS) and sampling point deviates, the frequency based on estimation Offset with sampling point migration leading symbol and execute synchronous.

Leading symbol of the channel estimator 1620 based on compensation executes channel estimation.

A part and PN sequence at least one of of the compensator 1630 based on the signaling information being included in protection interval To compensate inter-carrier interference/intersymbol interference (ICI/ISI).

Signal processor 1640 can detect signaling information from the output of channel estimator 1620 and compensator 1630, and be based on The signaling information processing data symbol detected.

Figure 17 is the block diagram for the detailed configuration for showing receiving device accoding to exemplary embodiment.

Referring to Fig.1 7, receiving device 1700 accoding to exemplary embodiment may include the buffer for simultaneously operating 1710, carrier frequency shift/sampling point frequency shift (FS) (CFO/SFO) estimator 1720 and leading symbol compensator 1730.

Receiving device 1700 executes signal detection based on the PN sequences positioned at the front end for the leading symbol being included in frame.This In, receiving device 1700 can carry out relevant treatment to detect maximum related value to PN sequences and pre-stored PN sequences, and corresponding Ground executes signal detection (that is, detection of leading symbol) and symbol timing deviation (STO) estimation.

Here, if the protection interval including PN sequences is inserted into the both ends of leading symbol, receiving device 1700 can The estimation of the detection and symbol timing deviation (STO) of leading symbol is more accurately executed based on the PN sequences for being inserted into both ends.

When detecting leading symbol, it is strong same to be executed in the starting stage that buffer 1710 can cache leading symbol Step operation.

In addition, carrier frequency shift/sampling point frequency shift (FS) (CFO/SFO) estimator 1720 can be based on being included in being inserted into PN sequences in the protection interval of the front end of leading symbol estimate CFO/SFO.Equally, if including the protection interval of PN sequences It is included in the both ends of the leading symbol received, then CFO/SFO estimators 1720 can more accurately be estimated based on these PN sequences CFO/SFO。

In addition, leading symbol compensator 1730 can be compensated based on the CFO/SFO values estimated by CFO/SFO estimators 1720 The leading symbol cached in buffer 1710.

Then, channel/STO estimators 1740 can execute channel estimation based on the leading symbol after compensation.

In addition, ICI/ISI, which eliminates unit 1750, to remove ICI/ISI based on the leading symbol after compensation.

Specifically, the corresponding compensator of unit 1,750 1630 is eliminated with ICI/ISI can be based on being included in protection interval At least one of signaling information and PN sequences compensate ICI/ISI, more specifically, if be inserted into the guarantor at leading symbol both ends Shield interval includes PN sequences, then can remove the PN sequences as interference signal, and the signaling information of composition leading symbol can be used A part compensate ICI/ISI.The processing is described in further detail in 8 and Figure 19 referring to Fig.1.

Figure 18 and Figure 19 shows the method for compensating ICI/ISI accoding to exemplary embodiment.

Referring to Fig.1 8, receive under a multipath channel environment three frames 1800-1,1800-2,1800-3 are shown.In place In the both ends of each leading symbol of the front end of each frame in three frames 1800-1,1800-2,1800-3, including PN sequences Protection interval be inserted into the both ends of leading symbol.In this case, compensator 1630 is based on the first frame received first The leading symbol of 1800-1 positions FFT windows 1810.

Compensator 1630 can be removed based on the channel estimated in channel estimator 1620 in the second frame 1800-2 and third Frame 1800-3 is used as the PN sequences 1820 of interference.Compensator 1630 has known the information about PN sequences, therefore, can only delete PN The PN sequences 1820 as interference signal among sequence.

In addition, compensator 1630 can be by using suffix (that is, being inserted into a part of signaling information in leading symbol 1830) the PN sequences 1820 removed are compensated.Therefore, compensator 1630 can remove entire ISI/ICI.

In Figure 19, receive under a multipath channel environment three frames 1900-1,1900-2 and 1900-3 are shown.Separately Outside, it when the protection interval including PN sequences is inserted into the front end of each leading symbol of three frames, and forms leading After a part 1920 for the signaling information of symbol is replicated and the protection interval 1930 be inserted into is inserted into each leading symbol When end, leading symbol of the compensator 1630 based on last received third frame 1900-3 positions FFT windows 1910.

In this case, it in FFT windows 1910, only detects the signaling information of composition leading symbol, but does not detect To the PN sequences as interference signal, therefore, ISI/ICI can be readily removable.

Therefore, compensator 1630 can include PN sequences or institute according to the protection interval at the both ends for being inserted into leading symbol State one of protection interval including PN another protection interval include signaling information a part, removed using different methods ISI/ICI。

The size of the leading symbol handled by receiving device 1600 is 8K, is included in the both ends for being inserted into leading symbol The size of PN sequences in protection interval is 3648 sampling points.

Figure 20 is the block diagram for the configuration for showing receiving device according to another exemplary embodiment.

With reference to Figure 20, receiving device 2000 includes receiver 1610, synchronizer 1660, channel estimator 1620, compensator 1630, signal processor 1640 and signal processor 1650.Here, it has been described that receiver 1610, is mended channel estimator 1620 Device 1630 and signal processor 1640 are repaid, further this will not be described.

Signal processor 1650 can extract signaling information from the leading symbol received.Specifically, signal processor 1650 Extractable L1 signalings are simultaneously decoded, and are obtained with the relevant value of the information of the protocol version about frame, about the letter of frame type Breath and about the method inserted data into frame information.

Figure 21 is the block diagram for signal processor accoding to exemplary embodiment to be described in detail.

Signal processor 1640 with reference to Figure 21, Figure 16 or Figure 20 includes demodulator 1641, decoding signals 1642 and stream Generator 1643.

Demodulator 1641 executes the RF signals received according at least one OFDM parameters and demodulates and execute synchronous detection, When detecting synchronous, what demodulator 1641 identified that the information that is stored from retaining zone receives is transportable frame or fixation Frame.

In this case, when not predefining about the OFDM parameters of signaling area and data area, can pass through It obtains and executes demodulation with the information of the OFDM relating to parameters about signaling area and data area after retaining zone.

Decoding signals 1642 execute decoding to the data received.In this case, decoding signals 1620 can make Parameter related with the data being stored in each data area is obtained with from the signaling information that signal processor 1650 detects (such as, FEC methods or modulator approach), and execute decoding.In addition, decoding signals 1642 can based on be included in it is configurable after Data information after signaling and dynamic in signaling calculates the position that data start.In other words, decoding signals 1642 can be counted Calculate the position for the frame that PLP is sent.

Flow generator 1643 can be handled and be generated to the base band frame received from decoding signals 1642 and will be serviced Data.

Flow generator 1643 can based on information related with the protocol version of frame provided by signal processor 1650, about The information of frame type and information about the method for being inserted into data, the L1 to be corrected from error contract for fixed output quotas raw L2 packets.

Specifically, flow generator 1643 may include Key dithering (De-Jitter) buffer, de-jittering buffer device can be based on The relevant value of information of protocol version about the frame provided by signal processor 1650, about the information of frame type and about number According to the information of insertion method, to regenerate the accurate sequential for restoring output stream.Therefore, it can compensate for between multiple PLP Synchronous delay.

Figure 22 is the block diagram for the detailed configuration for showing signal processor accoding to exemplary embodiment.

According to fig. 22, signal processor 1650 includes demodulator 1651, multiplexer 1652, deinterleaver 1653 and decoder 1654。

Demodulator 1651 receives the signal sent from sending device 100 and is demodulated.Specifically, demodulator 1651 docks The signal received is demodulated, and generation is corresponding with LDPC code word to be worth, and the value is output to multiplexer 1652.

In this case, value corresponding with LDPC code word can be indicated as the channel value about the signal received.This In, there are a variety of methods for determining channel value, for example, the method for determining log-likelihood ratio (LLR) value.

Here, LLR value can be indicated as logarithm being applied to the ratio that the bit that sends from sending device 100 can be 0 or 1 The value of example.Alternatively, LLR value can be the bit value itself determined based on hard decision, LLR value can be according to from sending device The bit of 100 transmissions can be the typical value of 0 or 1 section determination.

Multiplexer 1652 is multiplexed the output valve of demodulator 1651, and the value is output to deinterleaver 1653.This In, the output valve of demodulator 1651 is corresponding to LDPC code word, for example, LLR value.

Specifically, multiplexer 1652 is corresponding with the demultiplexer (Fig. 5,1240-2) that is arranged in sending device 100 Element, and the de-multiplex operation executed by demultiplexer 1240-2 can be executed on the contrary.That is, multiplexer 1652 can be used Parallel-to-serial conversion process is carried out a pair value corresponding with the LDPC code word exported from demodulator 1651 and is converted, and pair and LDPC The corresponding value of code word is multiplexed.

Deinterleaver 1653 is deinterleaved the output valve of multiplexer 1652 and is output to decoder 1654.

Specifically, deinterleaver 1653 is corresponding with the interleaver (Fig. 5,1230-2) that is arranged in sending device 100 Element, deinterleaver 1653 can execute the operation executed by interleaver (Fig. 5,1230-2) on the contrary.In other words, deinterleaver 1653 can perform the deinterleaving being worth corresponding with LDPC code word, to be operated with the intertexture executed by interleaver (Fig. 5,1230-2) Accordingly.Here, value corresponding with LDPC code word can be LLR value.

Decoder 1654 is element corresponding with the FEC encoder 1220-2 being arranged in sending device 100, and can be opposite Ground executes the operation executed by FEC encoder 1220-2.Specifically, decoder 1654 can execute solution based on the LLR value of deinterleaving Code simultaneously exports L1 signalings.

Figure 23 is the flow chart of the method for describing control sending device accoding to exemplary embodiment.

Method shown in 3 according to fig. 2, including the leading symbol of signaling information are inserted into frame (S2310).

In addition, at the both ends of leading symbol, it is inserted into protection interval (S2320).

Then, it includes leading symbol and the frame (S2330) of protection interval to send.

Here, it includes PN sequences to be inserted into one of protection interval at both ends of leading symbol, and another protection interval includes PN One in sequence and a part for signaling information.

In particular, among the protection interval at the both ends for being inserted into leading symbol, it is inserted into the protection interval packet of front end PN sequences are included, the protection interval for being inserted into rear end includes one in PN sequences and a part for signaling information.

In addition, the step of being inserted into protection interval may include generating size PN sequences identical with the size of leading symbol, it will A part for PN sequences is inserted into each protection interval in the protection interval at the both ends for being inserted into leading symbol or will The different parts of the PN sequences of generation are inserted respectively into the protection interval for being inserted into both ends.

Meanwhile method shown in Figure 23 may also include the PN sequences with predefined size are inserted into leading symbol.

Here, the step of being inserted into the PN sequences with default size may include generating identical with leading symbol with size PN sequences, and the PN sequences of generation are inserted into leading symbol by the way that the PN sequences of generation are narrowed down to default size.

In addition, the size of leading symbol is 8K, the PN being included in the protection interval at the both ends for being inserted into leading symbol The size of sequence is 3648 sampling points.

Figure 24 is the flow chart for describing the method for controlling and receiving equipment accoding to exemplary embodiment.

Method shown in 4 according to fig. 2 receives the frame including at least one data symbol and leading symbol, wherein preceding It includes signaling information to lead symbol.Here, protection interval is inserted into the both ends of leading symbol.One of protection interval includes PN sequences Row, another protection interval includes one (S2410) in PN sequences and a part for signaling information.

In addition, based at least one of protection interval PN sequences are included in, compensate leading symbol and execute synchronization (S2420)。

Here, it includes being estimated based at least one PN sequence pairs frequency shift (FS) and sampling point offset to execute synchronous step Meter, the frequency shift (FS) based on estimation and sampling point migration leading symbol, and execute synchronization.

In addition, executing channel estimation (S2430) based on the leading symbol after compensation.

At least one of part and PN sequences subsequently, based on the signaling information being included in protection interval, compensation ICI/ISI(S2440)。

In addition, signaling information can be extracted from the leading symbol for performing channel estimation and ICI/ISI compensation, and can be based on carrying The signaling information taken handles (S2450) data symbol being included in frame.

In addition, the protection interval for being inserted into the front end of leading symbol includes PN sequences, it is inserted into the rear end of leading symbol Protection interval includes one in PN sequences and a part for signaling information.

The nonvolatile for the program for being stored with the above method for being sequentially performed control sending device or receiving device can be provided Property computer-readable medium.

Non-transitory computer-readable medium is not configured to temporarily store medium (such as, register, the high speed of data Caching or memory), and be configured as semi-permanently storing the device-readable medium of data.Specifically, above-mentioned various applications Or program can store and be arranged in non-transitory device-readable medium (such as, compact disk (CD), digital versatile disc (DVD), hard Disk, Blu-ray disc, universal serial bus (USB), storage card or read-only memory (ROM)) in.

Accoding to exemplary embodiment, the group that the block shown in Fig. 1-Fig. 6, Figure 16, Figure 17 and Figure 20-Figure 22 indicates At least one of part, element or unit can be implemented as the hardware of the above-mentioned each function of execution of various quantity, software and/or Firmware.For example, at least one of these components, element or unit can be used can by one or more microprocessors or its The control of his control device executes the straight flow structure (such as, memory, processing, logic, look-up table etc.) of each function.In addition, At least one of these components, element or unit can be embodied as comprising one for executing specified logic function Or more executable instruction module, a part for journey logic bomb.In addition, in these components, element or unit at least One may also include the processor (such as, central processing unit (CPU)) for executing each function, microprocessor etc..In addition, although It, can be by bus come the communication between executive module, element or unit bus is not shown in top block diagram of FIG.Foregoing exemplary is implemented The functional aspect of example can be realized with the algorithm executed on one or more processors.In addition, being walked by frame or processing Suddenly component, element or the unit indicated can be used for the arbitrary of electrical arrangement, signal processing and/or control, data processing etc. The prior art of quantity.

Foregoing example embodiment and advantage are merely exemplary, and are not necessarily to be construed as limitation present inventive concept.It is exemplary Embodiment is readily applicable to other kinds of device or equipment.In addition, the description of exemplary embodiment is intended to illustrate, not It is to limit the scope of the inventive concept, many replacements, modifications and changes will be apparent to those skilled in the art.

Industrial Applicability A

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Claims (13)

1. a kind of sending device, including：

Leading symbol inserter is configured as the leading symbol including signaling information being inserted into frame；

Protection interval inserter is configured as protection interval being inserted into the both ends of leading symbol；

Transmitter is configured as the frame that transmission includes leading symbol and the protection interval,

Wherein, a protection interval in the protection interval includes pseudo noise PN sequences, and in the protection interval Another protection interval include one in PN sequences and a part for signaling information,

Wherein, the size of PN sequences and the size of leading symbol are identical, and

Wherein, protection interval inserter by a part for PN sequences be inserted into each protection interval in the protection interval or The different piece of PN sequences is inserted into the protection interval respectively.

2. sending device as described in claim 1, wherein the protection interval for being inserted into the front end of leading symbol includes PN sequences Row, the protection interval for being inserted into the rear end of leading symbol include one in PN sequences and the part of signaling information.

3. sending device as described in claim 1, wherein protection interval inserter, which is additionally configured to generate, has predefined size PN sequences, and the PN sequences of generation are inserted into leading symbol.

4. sending device as claimed in claim 3, wherein the PN sequences of generation have size identical with leading symbol,

Wherein, protection interval is additionally configured to the PN sequences of generation narrowing down to the predefined size, and by the PN sequences after diminution Row are inserted into leading symbol.

5. sending device as described in claim 1, wherein the size of leading symbol is 8K, each of described protection interval The size of included PN sequences is 3648 sampling points in protection interval.

6. a kind of receiving device, including：

Receiver is configured as receiving the leading symbol of data symbol including signaling information and is inserted into leading symbol both ends Protection interval a, wherein protection interval in the protection interval includes pseudo noise PN sequences, and between the protection Another protection interval in includes one in PN sequences and a part for signaling information, wherein the size of PN sequences with The size of leading symbol is identical, and wherein, and a part for PN sequences is included between the protection of each of described protection interval Every or the different pieces of PN sequences be respectively included in the protection interval；

Synchronizer is configured as compensating leading symbol based on the PN sequences being included in the protection interval and executes synchronization；

Channel estimator, leading symbol after being configured as based on compensation execute channel estimation；

Compensator is configured as in the part and the PN sequences based on the signaling information being included in the protection interval It is at least one to compensate intercarrier interference/intersymbol interference ISI；

Signal processor is configured as detecting signaling information from the output of channel estimator and compensator, and based on detecting Signaling information handles the data symbol being included in frame.

7. receiving device as claimed in claim 6, wherein synchronizer is configured as being based on the frequency shift (FS) of PN sequence pairs and sampling point Offset is estimated, and is deviated based on the frequency shift (FS) of estimation with sampling point to compensate leading symbol and execute synchronous.

8. receiving device as claimed in claim 6, wherein the protection interval for being inserted into the front end of leading symbol includes PN sequences Row, the protection interval for being inserted into the rear end of leading symbol includes one in PN sequences and a part for signaling information.

9. receiving device as claimed in claim 6, wherein if each protection interval in the protection interval includes PN sequences Row, then compensator is configured as PN sequence of the removal as interference signal, and uses the one of the signaling information for forming leading symbol Part compensates ICI/ISI.

10. receiving device as claimed in claim 6, wherein the size of leading symbol is 8K, and the size of PN sequences is 3648 Sampling point.

11. a kind of method of control sending device, the method includes：

Leading symbol including signaling information is inserted into frame；

Protection interval is inserted into the both ends of leading symbol；

Transmission includes the frame of leading symbol and the protection interval,

Wherein, a protection interval in the protection interval includes pseudo noise PN sequences, another in the protection interval One protection interval includes one in PN sequences and a part for signaling information,

Wherein, the size of PN sequences and the size of leading symbol are identical, and

Wherein, a part for PN sequences is inserted into each protection interval in the protection interval by protection interval inserter, or The different piece of PN sequences is inserted into the protection interval by person respectively.

12. method as claimed in claim 11, wherein the protection interval for being inserted into the front end of leading symbol includes PN sequences, The protection interval for being inserted into the rear end of leading symbol includes one in PN sequences and a part for signaling information.

13. a kind of control method of receiving device, the control method include：

Reception includes the leading symbol of data symbol including signaling information and the protection interval for being inserted into leading symbol both ends Frame a, wherein protection interval in the protection interval includes pseudo noise PN sequences, and in the protection interval Another protection interval includes one in PN sequences and a part for signaling information, wherein the size and leading character of PN sequences Number size it is identical, and wherein, the parts of PN sequences be included in each protection interval in the protection interval or The different piece of PN sequences is respectively included in the protection interval；

Leading symbol is compensated based on the PN sequences being included in the protection interval and executes synchronization；

Channel estimation is executed based on the leading symbol after compensation；

Carrier wave is compensated based at least one of a part for the signaling information being included in the protection interval and PN sequences Between interference ICI/ intersymbol interference ISI；

Signaling information is detected from the leading symbol for performing channel estimation and ICI/ISI compensation, and based on the signaling letter detected Breath handles the data symbol being included in frame.