CN105007145B - The generation method of leading symbol and the generation method of frequency-domain OFDM symbol - Google Patents
The generation method of leading symbol and the generation method of frequency-domain OFDM symbol Download PDFInfo
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Abstract
The invention discloses a kind of generation method of leading symbol in physical frame and the generation methods of frequency-domain OFDM symbol, and wherein the generation method of frequency-domain OFDM symbol includes the following steps: to generate fixed sequence program and signaling sequence respectively on frequency domain；Fixed sequence program and signaling sequence are filled to effective subcarrier, and arranged between the fixed sequence program and signaling sequence in oem character set；Fill null sequence subcarrier respectively in effective subcarrier two sides to form the frequency-domain OFDM symbol of predetermined length.The technical program solves in current DVB_T2 standard and other standards, and the problem of probability of failure occurs in leading symbol low complex degree receiving algorithm detection under frequency selective fading channels.
Description
Technical field
The present invention relates to wireless broadcast communication technical field, in particular to the generation method of leading symbol in a kind of physical frame
And the generation method of frequency-domain OFDM symbol.
Background technique
Generally for enabling the receiving end of ofdm system correctly to demodulate data transmitted by transmitting terminal, ofdm system is necessary
Realize between transmitting terminal and receiving end accurately and reliably time synchronization.Simultaneously as ofdm system is very quick to the frequency deviation of carrier wave
Sense, the receiving end of ofdm system it is also required to provide the carrier spectrum estimation method of precise and high efficiency, accurate to carry out to carrier wave frequency deviation
Estimation and correction.
Currently, it is real to realize that the transmitting terminal method synchronous with destination time is based on leading symbol in ofdm system
Existing.Leading symbol is all known symbol sebolic addressing of transmitting terminal and receiving end of ofdm system, and leading symbol is as physical frame
Start (being named as P1 symbol), P1 symbol only occurs once in each physical frame, it has indicated the beginning of the physical frame.P1 symbol
Number purposes include:
1) detect receiving end rapidly with determine transmitted in channel whether be expectation received signal；
2) basic configured transmission (such as FFT points, frame type information etc.) is provided so that receiving end can carry out after continued access
Receipts processing；
3) original carrier frequency deviation and timing error are detected, reaches frequency and Timing Synchronization after compensating.
The P1 Design of Symbols based on CAB spatial structure is proposed in DVB_T2 standard, preferably realizes above-mentioned function.But
It is still to have some limitations on low complex degree receiving algorithm.For example, in the long multipath letter of 1024,542 or 482 symbols
When road, relatively large deviation can be occurred by being timed thick synchronization using CAB structure, cause to estimate that carrier wave integer frequency offset occurs on frequency domain
Mistake.In addition, DPSK differential decoding may also can fail in frequency selective fading channels.
Summary of the invention
The invention solves in current DVB_T2 standard and other standards, leading symbol is in frequency selective fading channels
There is the problem of probability of failure in lower low complex degree receiving algorithm detection.
To solve the above problems, the embodiment of the invention provides a kind of generation method of frequency-domain OFDM symbol, including it is as follows
Step: fixed sequence program and signaling sequence are generated respectively on frequency domain；Fixed sequence program and signaling sequence are filled to effective subcarrier
On, and arranged between the fixed sequence program and signaling sequence in oem character set；Zero is filled respectively in effective subcarrier two sides
Sequence subcarrier is to form the frequency-domain OFDM symbol of predetermined length.
Optionally, the fixed sequence program is sequence of complex numbers, and the mould of each plural number is 1 in the sequence of complex numbers.
Optionally, n-th of plural number is in the sequence of complex numbersWherein, ωnValue according to
Sequence is as shown in the table by rows from left to right:
Optionally, signaling sequence is generated on frequency domain to include the following steps: to generate consensus sequence；The consensus sequence is carried out
Cyclic shift is to generate signaling sequence.
Optionally, the consensus sequence indicates are as follows:
Carrying out the signaling sequence generated after cyclic shift to the consensus sequence indicates are as follows:Wherein kiIt is as shown in the table for shift value:
Optionally, the equal length of the length of the fixed sequence program and the signaling sequence, and the length is less than described pre-
The 1/2 of measured length.
Optionally, null sequence subcarrier is filled respectively in effective subcarrier two sides to form the frequency domain of predetermined length
OFDM symbol includes: to fill the null sequence subcarrier of equal length respectively in effective subcarrier two sides to form predetermined length
Frequency-domain OFDM symbol.
Optionally, the length of the null sequence subcarrier of every side filling is greater than critical length value, and the critical length value is by system
Symbol rate and predetermined length determine.
Optionally, the predetermined length is 1024.
The embodiment of the invention also provides a kind of generation method of leading symbol in physical frame, include the following steps: according to
The generation method of above-mentioned frequency-domain OFDM symbol generates frequency-domain OFDM symbol；Inverse discrete Fourier transform is made to the frequency-domain OFDM symbol
It changes to obtain time-domain OFDM symbol；Generate the modulated signal of the time-domain OFDM symbol；Based on the time-domain OFDM symbol and it is somebody's turn to do
Modulated signal generates leading symbol.
Optionally, the modulated signal for generating the time-domain OFDM symbol includes: one frequency displacement sequence of setting；It will be described
Time-domain OFDM symbol is multiplied by the modulated signal of the frequency displacement sequence to obtain the time-domain OFDM symbol.
Optionally, leading symbol is generated with the modulated signal based on the time-domain OFDM symbol to refer to: the modulation is believed
Protection interval number as the time-domain OFDM symbol, and spliced leading to generate in the front of the time-domain OFDM symbol
Symbol.
Optionally, the modulated signal for generating the time-domain OFDM symbol includes: one frequency displacement sequence of setting；Respectively will
The shift sequence of the time-domain OFDM symbol and the time-domain OFDM symbol is multiplied by the frequency displacement sequence to obtain the time-domain OFDM symbol
The first modulated signal and the second modulated signal.
Optionally, leading symbol is generated with the modulated signal based on the time-domain OFDM symbol to refer to: described first is adjusted
The protection interval of signal processed and the second modulated signal as the time-domain OFDM symbol, and the two modulated signals are spliced respectively
In the front and rear of the time-domain OFDM symbol to generate leading symbol.
Compared with prior art, technical solution of the present invention has the advantages that
The generation method of the frequency-domain OFDM symbol provided according to embodiments of the present invention, by fixed sequence program and signaling sequence with surprise
Even staggered mode is filled to effective subcarrier, in this way specific frequency-domain structure design, and wherein fixed sequence program can be made
For the pilot tone in physical frame, consequently facilitating receiving end is decoded demodulation to leading symbol in the physical frame received.
Further, fixed sequence program uses sequence of complex numbers, and the mould of each plural number is 1 in the sequence of complex numbers, so that after
The continuous leading symbol generated has lower papr (Peak to Average Power Ratio, PAPR), and
Improve the probability of success of receiving end detection leading symbol.
Further, using the modulated signal of time-domain OFDM symbol and the structure of time-domain OFDM symbol (as leading character
Number) it ensure that the peak value for utilizing delay correlation may be significantly in receiving end.Also, during generating the leading symbol,
Design time-domain OFDM symbol modulated signal can to avoid receiving end by continuous wave CO_2 laser perhaps mono-tone interference or occur with
The isometric multipath channel of modulated signal length, or receive and go out when protection interval length is identical with the length of modulated signal in signal
Existing error detection peak value.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of the specific embodiment of the generation method of frequency-domain OFDM symbol of the invention；
Fig. 2 is the frequency domain carriers point of the frequency-domain OFDM symbol generated using the generation method of frequency-domain OFDM symbol of the invention
Cloth schematic diagram；
Fig. 3 is the process signal of the specific embodiment of the generation method of leading symbol in a kind of physical frame of the invention
Figure.
Specific embodiment
Inventor has found in current DVB_T2 standard and other standards that leading symbol is low under frequency selective fading channels
There is the problem of probability of failure in the detection of complexity receiving algorithm.
In view of the above-mentioned problems, inventor after study, provides the generation method and frequency of leading symbol in a kind of physical frame
The generation method of domain OFDM symbol guarantees that carrier frequency offset receiving end within the scope of -500kHz to 500kHz still can handle
Receive signal.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
As shown in Fig. 1 a kind of process of the specific embodiment of the generation method of frequency-domain OFDM symbol of the invention is shown
It is intended to.With reference to Fig. 1, the generation method of frequency-domain OFDM symbol includes the following steps:
Step S11: fixed sequence program and signaling sequence are generated respectively on frequency domain；
Step S12: fixed sequence program and signaling sequence are filled to effective subcarrier, and the fixed sequence program and signaling sequence
It is arranged between column in oem character set；
Step S13: null sequence subcarrier is filled respectively in effective subcarrier two sides to form the frequency domain of predetermined length
OFDM symbol.
Specifically, as described in step S11, fixed sequence program and signaling sequence are generated respectively on frequency domain.Wherein, described solid
Sequencing column include that receiving end can be used to do the relevant information of carrier frequency synchronization and Timing Synchronization, the signaling sequence includes each
Basic configured transmission.
In the present embodiment, the fixed sequence program is sequence of complex numbers, and the mould of each plural number is 1 in the sequence of complex numbers.It is described
Signaling sequence is used to transmit the information (such as various signalings) of P bit, shares 2PA possibility, every kind may be mapped to one
Length is the signaling sequence of M.Sequence group has 2PA sequence, and uncorrelated each other, while also not with known fixed sequence program
It is related.
As described in step S12, the fixed sequence program and signaling sequence are filled to effective subcarrier, and the fixed sequence
It is arranged between column and signaling sequence in oem character set.
In one preferred embodiment, the equal length of the length of the fixed sequence program and the signaling sequence, and
The length is less than the 1/2 of the predetermined length.Wherein, the predetermined length is 1024, but can also be according to being in practical application
System demand and change.
By taking predetermined length is 1024 as an example, if the length of fixed sequence program is N (i.e. effective subcarrier of carrying fixed sequence program
Number is N), the length of signaling sequence be M (i.e. the number of effective subcarrier of carrier signaling sequence is M), in the present embodiment,
M=N.In other embodiments, N can also be slightly larger than M.
Between the fixed sequence program and signaling sequence in oem character set arrange, i.e., fixed sequence program fill to even subcarrier (or
Odd subcarrier) on position, correspondingly, signaling sequence is filled to odd subcarrier (or even subcarrier) position, thus in frequency domain
The distribution of fixed sequence program and the arrangement of signaling sequence oem character set is presented on effective subcarrier.It should be noted that when fixing
When sequence and the inconsistent length of signaling sequence (such as M > N), fixation can be realized by way of zero padding sequence subcarrier
Sequence and the arrangement of signaling sequence oem character set.
As described in step S13, null sequence subcarrier is filled respectively in effective subcarrier two sides to form predetermined length
Frequency-domain OFDM symbol.
In a preferred embodiment, this step includes: to fill the zero of equal length respectively in effective subcarrier two sides
Sequence subcarrier is to form the frequency-domain OFDM symbol of predetermined length.
Along the example for being 1024 to predetermined length, the G=1024-M-N of the length of null sequence subcarrier, two sides filling
(1024-M-N)/2 null sequence subcarrier.
Further, in order to guarantee that receiving end can still be located within the scope of -500kHz to 500kHz in carrier frequency offset
Reason receives signal, and the value of (1024-M-N)/2 is typically larger than critical length value (being set as TH), and the critical length value is by system symbol
Rate and predetermined length determine.For example, system symbol rate of the predetermined length for 1024,7.61M, the sample rate of 9.14M, thenFor example, M=N=350, then G=324, two sides are respectively filled
162 null sequence subcarriers.
Therefore, subcarrier (i.e. frequency-domain OFDM symbol) P1_X of predetermined length (1024)0,P1_X1,…,P1_X1023By
Following manner filling generates:
Wherein,Locating odd even position can be interchanged.
As shown in Fig. 2 the frequency of the frequency-domain OFDM symbol generated using the generation method of frequency-domain OFDM symbol of the invention
Domain distribution of carriers schematic diagram.
Using the generation method of frequency-domain OFDM symbol described in the embodiment of the present invention, for above-mentioned steps S11, inventor's warp
It crosses research and obtains a kind of specific embodiment of sequence for generating fixed sequence program and signaling on frequency domain.
Along to length that predetermined length be the 1024, fixed sequence program and the signaling sequence equal length (all for
350) example.
Specifically, the fixed sequence program is sequence of complex numbers, and the mould of each plural number is 1 in the sequence of complex numbers.For example, the plural number
N-th of plural number is in sequenceWherein, ωnValue in order from left to right by rows
It is as shown in the table:
Wherein, it is 0~9 corresponding ω that the first row, which is n,nValue, the second row be that n is 10~19 corresponding ωnValue, with this
Analogize, the 35th row is that n is 340~349 corresponding ωnValue.
Signaling sequence shares 2 for transmitting the information of P (such as P=8) bits8A possibility, every kind may be mapped
The signaling sequence for being 350 to a length.
Specifically, signaling sequence is generated on frequency domain to include the following steps:
1) consensus sequence is generated；
2) cyclic shift is carried out to generate signaling sequence to the consensus sequence.
Wherein, the consensus sequence is part Zadoff-Chu sequence.For example, the consensus sequence can indicate are as follows:
Carrying out the signaling sequence generated after cyclic shift to the consensus sequence indicates are as follows:Wherein kiIt is as shown in the table for shift value:
In other embodiments, optional 8 (corresponding P is 3) transmitted in 256 sequences, 16 (corresponding P is 4),
32 (corresponding P be 5), 64 (corresponding P is 6), 128 (corresponding P be 7) and 256 (corresponding to P is 8) meet system to transmit
The signaling of P bit of demand, and the value of P is smaller, and the papr (PAPR) for the sequence subset selected will be more
It is low.
Finally, subcarrier (i.e. frequency-domain OFDM symbol) P1_X of predetermined length (1024)0,P1_X1,…,P1_X1023By
Following manner filling generates:
WhereinPut odd even position can be interchanged.
The embodiment of the invention also provides a kind of generation methods of leading symbol in physical frame.As shown in Fig. 3 this hair
The flow diagram of the specific embodiment of the generation method of leading symbol in a kind of bright physical frame.With reference to Fig. 3, in physical frame
The generation method of leading symbol includes the following steps:
Step S21: frequency-domain OFDM symbol is generated according to the generation method of above-mentioned frequency-domain OFDM symbol；
Step S22: inverse discrete fourier transform is made to obtain time-domain OFDM symbol to the frequency-domain OFDM symbol；
Step S23: the modulated signal of the time-domain OFDM symbol is generated；
Step S24: leading symbol is generated based on the time-domain OFDM symbol and the modulated signal.
It should be noted that leading symbol can be described from two domains of time domain and frequency domain.In the present embodiment, leading
The generation method of symbol is generation frequency-domain OFDM symbol, and the time domain corresponding based on the frequency-domain OFDM symbol on frequency domain
The modulated signal of OFDM symbol generates the leading symbol in time domain.
Wherein, the specific embodiment of the step S21 can be with reference to specific embodiment described in figure 1 above, herein not
It repeats again.
As described in step S22, inverse discrete fourier transform is made to obtain time-domain OFDM symbol to the frequency-domain OFDM symbol.
Inverse discrete fourier transform described in this step is that frequency-region signal is commonly converted into the mode of time-domain signal,
It will not go into details for this.
P1_XiTime-domain OFDM symbol is obtained after making inverse discrete fourier transform:
As described in step S23, the modulated signal of the time-domain OFDM symbol is generated.
In example A, this step includes: that a frequency displacement sequence 1) is arranged；2) by the time-domain OFDM symbol multiplied by the frequency
Sequence is moved to obtain the modulated signal of the time-domain OFDM symbol.
For example, set the frequency displacement sequence asWherein fSH=1/ (1024T).M (t) can also be set
Count into other sequences, such as m-sequence or the window sequence of some simplification.
The modulated signal of time-domain OFDM symbol is P1_B (t), and P1_B (t) is by P1_A (t) multiplied by frequency displacement sequence M (t)
(i.e. P1_B (t)=P1_A (t) * M (t)) is obtained, and is used as the protection interval of P1_A (t).
In example B, this step includes: that a frequency displacement sequence 1) is arranged；2) respectively by the time-domain OFDM symbol and this
The shift sequence of time-domain OFDM symbol obtains the first modulated signal and second of the time-domain OFDM symbol multiplied by the frequency displacement sequence
Modulated signal.
For example, set the frequency displacement sequence asWherein fSH=1/ (1024T).M (t) can also be set
Count into other sequences, such as m-sequence or the window sequence of some simplification.
The time-domain OFDM symbol is P1_A (t), and the shift sequence of the time-domain OFDM symbol is P1_A (t-1024T).
As described in step S24, leading symbol is generated based on the time-domain OFDM symbol and the modulated signal.
In example A, this step include: using the modulated signal as the protection interval of the time-domain OFDM symbol, and
Spliced in the front of the time-domain OFDM symbol to generate leading symbol.
For example, leading symbol can be generated according to following formula:
The length of protection interval might be less that the length of time-domain OFDM symbol, if the length of protection interval is B_len, when
The length of domain OFDM symbol is A, and the part preceding B_len of A is taken to be modulated, it may be assumed that
In example B, this step includes: using first modulated signal and the second modulated signal as the time domain OFDM
The protection interval of symbol, and the two modulated signals are spliced into the front and rear in the time-domain OFDM symbol respectively to generate
Leading symbol.
For example, leading symbol can be generated according to following formula:
Wherein, num1 is length of the splicing in the modulated signal of the front of the time-domain OFDM symbol, and the value of num1 is small
In the predetermined length (being 1024 in this example).Preferably, the value of num1 is 542.
In other embodiments, the generation method of the frequency-domain OFDM symbol provided based on foregoing embodiments, art technology
Personnel can use on this basis other embodiments (to be not limited to the step S22 to step S24) in Fig. 2 to the frequency domain
OFDM symbol is handled, to generate the leading symbol in time domain.
Although the invention has been described by way of example and in terms of the preferred embodiments, but it is not for limiting the present invention, any this field
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair
Bright technical solution makes possible variation and modification, therefore, anything that does not depart from the technical scheme of the invention, and according to the present invention
Technical spirit any simple modifications, equivalents, and modifications to the above embodiments, belong to technical solution of the present invention
Protection scope.
Claims (5)
1. a kind of generation method of frequency-domain OFDM symbol, which comprises the steps of:
Generate fixed sequence program and signaling sequence respectively on frequency domain；
Fixed sequence program and signaling sequence are filled to effective subcarrier, and are in odd even between the fixed sequence program and signaling sequence
It is staggered；
Fill null sequence subcarrier respectively in effective subcarrier two sides to form the frequency-domain OFDM symbol of predetermined length,
In,
Signaling sequence is generated on frequency domain to include the following steps:
Generate consensus sequence；
To consensus sequence progress cyclic shift to generate signaling sequence,
The consensus sequence indicates are as follows:N=0~349；
Carrying out the signaling sequence generated after cyclic shift to the consensus sequence indicates are as follows:
SCi=z (ki-1),z(ki),...,z(349),z(0),...,z(ki- 2), i=0~255,
Wherein kiFor shift value,
The fixed sequence program is sequence of complex numbers, and the mould of each plural number is 1 in the sequence of complex numbers,
N-th of plural number is in the sequence of complex numbersN=0,1 ... 349；Wherein, ωnValue in order from a left side
It turns right as shown in the table by rows:
Wherein kiIt is as shown in the table for shift value:
2. the generation method of frequency-domain OFDM symbol as described in claim 1, which is characterized in that the length of the fixed sequence program with
The equal length of the signaling sequence, and the length is less than the 1/2 of the predetermined length.
3. the generation method of frequency-domain OFDM symbol as described in claim 1, which is characterized in that in effective subcarrier two sides
Filling null sequence subcarrier includes: to distinguish in effective subcarrier two sides with the frequency-domain OFDM symbol for forming predetermined length respectively
The null sequence subcarrier of equal length is filled to form the frequency-domain OFDM symbol of predetermined length.
4. the generation method of frequency-domain OFDM symbol as claimed in claim 3, which is characterized in that null sequence of every side filling carries
The length of wave is greater than critical length value, which is determined by systematic sampling rate, symbol rate and predetermined length.
5. the generation method of frequency-domain OFDM symbol as described in claim 1, which is characterized in that the predetermined length is 1024.
Priority Applications (42)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611014234.7A CN106685878A (en) | 2014-04-16 | 2014-04-16 | Generating method of leading symbol |
| CN201611015653.2A CN106878223A (en) | 2014-04-16 | 2014-04-16 | The generation method of frequency-domain OFDM symbol |
| CN201410153040.XA CN105007145B (en) | 2014-04-16 | 2014-04-16 | The generation method of leading symbol and the generation method of frequency-domain OFDM symbol |
| CN201611199976.1A CN106998312B (en) | 2014-04-16 | 2015-02-06 | Preamble symbol receiving method |
| US15/304,856 US10574494B2 (en) | 2014-04-16 | 2015-04-16 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| US15/304,853 US10411929B2 (en) | 2014-04-05 | 2015-04-16 | Preamble symbol receiving method and device |
| CA3212005A CA3212005A1 (en) | 2014-04-16 | 2015-04-16 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| PCT/CN2015/076808 WO2015158292A1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| KR1020167032057A KR101975551B1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| KR1020197038044A KR102196222B1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| PCT/CN2015/076815 WO2015158296A1 (en) | 2014-04-16 | 2015-04-16 | Method and apparatus for receiving preamble symbol |
| KR1020207035510A KR102234307B1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| PCT/CN2015/076813 WO2015158294A1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| CA2945857A CA2945857C (en) | 2014-04-16 | 2015-04-16 | Preamble symbol receiving method and device |
| KR1020197018441A KR102114352B1 (en) | 2014-04-16 | 2015-04-16 | Method and apparatus for receiving preamble symbol |
| CA2945858A CA2945858C (en) | 2014-04-16 | 2015-04-16 | Preamble symbol receiving method and device |
| US15/304,854 US10778484B2 (en) | 2014-04-16 | 2015-04-16 | Preamble symbol transmitting method and device, and preamble symbol receiving method and device |
| CA2945855A CA2945855A1 (en) | 2014-04-16 | 2015-04-16 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| US15/304,851 US11071072B2 (en) | 2014-04-16 | 2015-04-16 | Preamble symbol receiving method and device |
| CA3211647A CA3211647A1 (en) | 2014-04-16 | 2015-04-16 | Preamble symbol receiving method and device |
| PCT/CN2015/076812 WO2015158293A1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| CA2945856A CA2945856C (en) | 2014-04-16 | 2015-04-16 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| KR1020167032043A KR101974621B1 (en) | 2014-04-16 | 2015-04-16 | Method and apparatus for receiving preamble symbol |
| KR1020207036622A KR102347011B1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| US15/304,857 US10148476B2 (en) | 2014-04-05 | 2015-04-16 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| KR1020167032059A KR102062221B1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| KR1020167032055A KR102048221B1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| KR1020197012400A KR102108291B1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| KR1020207014009A KR102223654B1 (en) | 2014-04-16 | 2015-04-16 | Method and apparatus for receiving preamble symbol |
| CA2945854A CA2945854A1 (en) | 2014-04-16 | 2015-04-16 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| PCT/CN2015/076814 WO2015158295A1 (en) | 2014-04-16 | 2015-04-16 | Method and apparatus for receiving preamble symbol |
| KR1020167032058A KR102033742B1 (en) | 2014-04-16 | 2015-04-16 | Method and apparatus for receiving preamble symbol |
| KR1020197033488A KR102191859B1 (en) | 2014-04-16 | 2015-04-16 | Method for generating preamble symbol, method for receiving preamble symbol, method for generating frequency domain symbol, and apparatuses |
| US16/172,662 US11201770B2 (en) | 2014-04-16 | 2018-10-26 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| US16/172,727 US11025465B2 (en) | 2014-04-16 | 2018-10-27 | Preamble symbol receiving method and device |
| US16/726,927 US11012275B2 (en) | 2014-04-16 | 2019-12-26 | Preamble symbol transmitting method and device |
| US16/726,928 US10958494B2 (en) | 2014-04-16 | 2019-12-26 | Preamble symbol receiving method and device |
| US16/992,040 US11128504B2 (en) | 2014-04-16 | 2020-08-12 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| US16/992,041 US11088885B2 (en) | 2014-04-16 | 2020-08-12 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| US16/992,038 US11088884B2 (en) | 2014-04-16 | 2020-08-12 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| US16/992,039 US11082274B2 (en) | 2014-04-16 | 2020-08-12 | Preamble symbol generation and receiving method, and frequency-domain symbol generation method and device |
| US17/351,197 US11799706B2 (en) | 2014-04-16 | 2021-06-17 | Preamble symbol receiving method and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410153040.XA CN105007145B (en) | 2014-04-16 | 2014-04-16 | The generation method of leading symbol and the generation method of frequency-domain OFDM symbol |
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| CN201611014234.7A Division CN106685878A (en) | 2014-04-16 | 2014-04-16 | Generating method of leading symbol |
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| US9843845B2 (en) | 2012-11-28 | 2017-12-12 | Sinclair Broadcast Group, Inc. | Terrestrial broadcast market exchange network platform and broadcast augmentation channels for hybrid broadcasting in the internet age |
| CN105024963A (en) * | 2014-04-30 | 2015-11-04 | 上海数字电视国家工程研究中心有限公司 | Frequency domain OFDM symbol generation method and preamble symbol generation method |
| MX2017001613A (en) | 2014-08-07 | 2018-01-24 | Coherent Logix Inc | Multi-partition radio frames. |
| KR102302600B1 (en) | 2014-08-07 | 2021-09-15 | 원 미디어, 엘엘씨 | Method for dynamic configuration of a flexible orthogonal frequency division multiplexing phy transport data frame |
| MX2018008687A (en) | 2014-08-25 | 2022-04-25 | One Media Llc | Dynamic configuration of a flexible orthogonal frequency division multiplexing phy transport data frame preamble. |
| CN110661590B (en) | 2015-03-09 | 2021-04-20 | 第一媒体有限责任公司 | System discovery and signaling |
| US10116973B2 (en) | 2015-04-08 | 2018-10-30 | ONE Media, LLC | Advanced data cell resource mapping |
| CN109716682B (en) | 2016-04-07 | 2021-04-16 | 辛克莱广播集团公司 | Next generation terrestrial broadcast platform looking at the internet and moving towards emerging 5G network architectures |
| CN106453176B (en) * | 2016-12-13 | 2019-11-26 | 中国联合网络通信集团有限公司 | A kind of method, apparatus and system of offset estimation |
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| US8208522B2 (en) * | 2008-03-07 | 2012-06-26 | Nokia Corporation | System and methods for receiving OFDM symbols having timing and frequency offsets |
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| CN106603456A (en) * | 2014-03-28 | 2017-04-26 | 上海数字电视国家工程研究中心有限公司 | Generation method of preamble symbol and generation method of frequency-domain OFDM symbol |
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