CN103313377B - A kind of sending method and device of synchronizing signal - Google Patents
A kind of sending method and device of synchronizing signal Download PDFInfo
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- CN103313377B CN103313377B CN201210068979.7A CN201210068979A CN103313377B CN 103313377 B CN103313377 B CN 103313377B CN 201210068979 A CN201210068979 A CN 201210068979A CN 103313377 B CN103313377 B CN 103313377B
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- H04W56/001—Synchronization between nodes
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Abstract
The invention discloses a kind of sending methods of synchronizing signal, including：First communication node sends synchronizing signal S1 in X frame, sends synchronizing signal S2 in (X+K) frame, synchronizing signal S1 and S2 are different, K >=1；Alternatively, the first communication node is sent based on synchronizing signal S1, S1 in X frame, secondary synchronization signal structure；The invention also discloses a kind of sending devices of synchronizing signal.By the invention it is possible to solve the problems, such as that terminal cost of implementation caused by synchronizing channel standard is high in existing wireless communications.
Description
Technical field
The present invention relates to the communications fields, particularly relate to a kind of sending method and device of synchronizing signal.
Background technology
With the development of mobile Internet and popularizing for smart mobile phone, mobile data flow demand is skyrocketed through, and is quickly increased
Long data service proposes severe challenge to the transmittability of mobile communications network.It is predicted according to authoritative institution, it is 10 years following
Interior (2011-2020), mobile data services amount will also double every year, will increase by 1,000 times within 10 years.
Most mobile data services occur mainly in indoor and hot spot environment, are presented as nomadic/local wireless access
Scene.According to statistics, nearly the 70% of mobile data services amount occurs indoors at present, and this ratio will also continue to increase, in advance
It will be more than 80% to count by 2012.Data service is mainly Internet service, and the requirement to service quality is relatively simple, and remote
Requirement less than conventional telecommunications business to service quality.
What cell mobile communication systems were mainly directed towards is high-speed mobile, the conventional telecommunications service design of seamless switching, when it
When carrying big flow low speed IP (Internet protocol) data packet traffic, efficiency is relatively low, and cost is excessively high.To use OFDM
LTE (the Long Term of (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing) technology
Evolution, long term evolution) for standard, in frame structure, resource allocation, control channel, pilot tone, the network architecture etc.
Be to meet the conventional telecommunications Demand Design of high-speed mobile, seamless switching, causing system control overhead close to 30%, and
The implementation complexity and cost of product are increased, for example, the problem of being designed due to LTE synchronizing channels itself, to frequency deviation tolerance
Ability is excessively poor, it is desirable that the frequency error that crystal oscillator generates is no more than a positive and negative subcarrier spacing (15kHz), this leads
Cause LTE terminal that must use expensive high-precision crystal oscillator.
Based on above-mentioned analysis, cellular mobile communication field needs inexpensive, the suitable nomadic or local wireless number of oneself
According to the solution of access.
Invention content
In view of this, the main purpose of the present invention is to provide a kind of sending method of synchronizing signal and device, to solve
The high problem of terminal cost of implementation caused by synchronizing channel standard in existing wireless communications.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
The present invention provides a kind of sending method of synchronizing signal, this method includes：
First communication node sends synchronizing signal S1 in X frame, and synchronizing signal S2, the synchronization are sent in (X+K) frame
Signal S1 and S2 are different, K >=1.
This method further includes：
Second communication node obtains synchronizing information after the X frame receives synchronizing signal S1, by synchronizing signal S1；Institute
Stating synchronizing information includes：Timing estimation and/or offset estimation；
Second communication node receives synchronizing signal according to the timing estimation and/or offset estimation from (X+K) frame
S2。
The X frame and (X+K) frame respectively include N number of symbol；N is positive integer；
The synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；The synchronizing signal S2 occupies (X+
K) M2 symbol in N number of symbol of frame；
The M1 and M2 is equal or unequal；M1 >=1 the N >, M2 >=1 N >.
The M1 symbol that the synchronizing signal S1 is occupied is located at the initial position of X frame；What the synchronizing signal S2 was occupied
M2 symbol is located at the initial position of (X+K) frame.
Synchronizing signal S1 and synchronizing signal S2 is by identical sequence by different arrangements or by unlike signal processing mode
It generates.
When the synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, the synchronizing signal S1 and S2
Primary synchronization signal generated by different arrangements or unlike signal processing mode by identical sequence；Alternatively,
Based on the synchronizing signal S2, when secondary synchronization signal structure, the primary synchronization signal of the synchronizing signal S2 with it is synchronous
Signal S1 is generated by identical sequence by different arrangements or unlike signal processing mode.
The identical sequence is the constant envelope zero auto-correlation sequence that length is Y.
When the symbol that the frame includes is OFDM symbol, the value of the Y is no more than the available sub- load of an OFDM symbol
1/ (2^n) of wave or all subcarriers, the n are the integer more than or equal to 0.
From the combined sequence that selection is used for generating synchronizing signal in the constant envelope zero auto-correlation arrangement set, at least
It is Y to have the sum of sequence identifier of two constant envelope zero auto-correlation sequences, and the sequence identifier is to generate the perseverance that the length is Y
Determine the number Z relatively prime with Y used when envelope zero auto-correlation sequence.
The different arrangement includes：One kind being arranged as the sequence and repeats P composition in the time domain；Another kind is arranged as
The sequence repeats P composition by being conjugated symmetrical mode in the time domain, and the P is the integer more than 1.
When the synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, the synchronizing signal S1 and same
The secondary synchronization signal for walking signal S2 is identical, is generated by the Golay sequences that length is G；Alternatively,
Based on the synchronizing signal S2, when secondary synchronization signal structure, the secondary synchronization signal of the synchronizing signal S2 is by length
It is generated for the Golay sequences of G.
When the symbol that the frame includes is OFDM symbol, the value of the G is no more than the available of OFDM symbol
1/ (2^n) of subcarrier or all subcarriers, the n are the integer more than or equal to 0.
The sequence number that Golay arrangement sets include is more than or equal to the sequence that constant envelope zero auto-correlation arrangement set includes
Number.
The present invention also provides a kind of sending devices of synchronizing signal, including：Setup module and sending module, wherein：
The setup module keeps the two different for synchronizing signal S1 and S2 to be arranged；
The sending module sends the synchronous letter for sending the synchronizing signal S1 in X frame in (X+K) frame
Number S2, K >=1.
The device further includes：
Receiving module obtains synchronizing information after receiving synchronizing signal S1 from the X frame by synchronizing signal S1；
The synchronizing information includes：Timing estimation and/or offset estimation；Further according to the timing estimation and/or offset estimation from described
(X+K) frame receives synchronizing signal S2.
The X frame and (X+K) frame respectively include N number of symbol；N is positive integer；
The synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；The synchronizing signal S2 occupies (X+
K) M2 symbol in N number of symbol of frame；
The M1 and M2 is equal or unequal；M1 >=1 the N >, M2 >=1 N >.
The setup module is additionally operable to that the start bit that the M1 symbol that the synchronizing signal S1 is occupied is located at X frame is arranged
It sets；The initial position that the M2 symbol that the synchronizing signal S2 is occupied is located at (X+K) frame is set.
The setup module is additionally operable to generate by different arrangements or unlike signal processing mode using identical sequence
The synchronizing signal S1 and synchronizing signal S2.
When the synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, the setup module is additionally operable to
It is main synchronous with S2's that the synchronizing signal S1 by different arrangements or unlike signal processing mode is generated using identical sequence
Signal；
Based on the synchronizing signal S2, when secondary synchronization signal structure, the setup module is additionally operable to use identical sequence
The primary synchronization signal and synchronizing signal S1 of the synchronizing signal S2 are generated by different arrangements or unlike signal processing mode.
The setup module, it is the constant envelope zero auto-correlation sequence of Y as the identical sequence to be additionally operable to use length
Row.
When the symbol that the frame includes is OFDM symbol, the value of the Y is no more than the available sub- load of an OFDM symbol
1/ (2^n) of wave or all subcarriers, the n are the integer more than or equal to 0；Alternatively,
From the combined sequence that selection is used for generating synchronizing signal in the constant envelope zero auto-correlation arrangement set, at least
It is Y to have the sum of sequence identifier of two constant envelope zero auto-correlation sequences, and the sequence identifier is to generate the perseverance that the length is Y
Determine the number Z relatively prime with Y used when envelope zero auto-correlation sequence.
The different arrangement includes：One kind being arranged as the sequence and repeats P composition in the time domain；Another kind is arranged as
The sequence repeats P composition by being conjugated symmetrical mode in the time domain, and the P is the integer more than 1.
The setup module is additionally operable in the synchronizing signal S1 and synchronizing signal S2 be main and auxiliary synchronizing signal structure
When, use length to generate the secondary synchronization signal of synchronizing signal S1 and synchronizing signal S2 for the Golay sequences of G；Synchronizing signal S1 and
The secondary synchronization signal of synchronizing signal S2 is identical；Alternatively, be additionally operable to based on the synchronizing signal S2, secondary synchronization signal structure when, adopt
The Golay sequences for being G with length generate the secondary synchronization signal of synchronizing signal S2；
When the symbol that the frame includes is OFDM symbol, the value of the G is no more than the available of OFDM symbol
1/ (2^n) of subcarrier or all subcarriers, the n are the integer more than or equal to 0.
The setup module, the sequence number that the Golay arrangement sets for being additionally operable to use include are more than or equal to constant envelope
The sequence number that zero auto-correlation arrangement set includes.
The present invention also provides a kind of sending methods of synchronizing signal, including：
First communication node sends based on synchronizing signal S1, the synchronizing signal S1 in X frame, secondary synchronization signal structure.
This method further includes：
After second communication node receives a primary synchronization signal of the synchronizing signal S1 from the X frame, pass through institute
It states primary synchronization signal and obtains synchronizing information；The synchronizing information includes：Timing estimation and/or offset estimation；
Second communication node receives the synchronizing signal S1's according to timing estimation and/or offset estimation from the X frame
Secondary synchronization signal or subsequent primary synchronization signal and secondary synchronization signal.
The X frame includes N number of symbol；N is positive integer；
The synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；M1 >=1 the N >.
The symbolic number that the primary synchronization signal of the synchronizing signal S1 occupies is greater than or equal to what the secondary synchronization signal occupied
Symbolic number.
The symbolic number that the primary synchronization signal occupies is two or more, on described two or more than two symbols
The primary synchronization signal of transmission is generated by identical sequence by different arrangements or by different signal processing modes.
The present invention also provides a kind of sending device of synchronizing signal, which includes：Setup module and sending module,
In：
The setup module makes the synchronizing signal S1 have main and auxiliary synchronizing signal knot for synchronizing signal S1 to be arranged
Structure；
The sending module, for sending the synchronizing signal S1 in X frame.
The device further includes receiving module, a primary synchronization signal for receiving synchronizing signal S1 from the X frame
Afterwards, synchronizing information is obtained by the primary synchronization signal；The synchronizing information includes：Timing estimation and/or offset estimation；Root again
According to the timing estimation and/or offset estimation subsequent secondary synchronization signal or subsequent main synchronous letter are received from the X frame
Number and secondary synchronization signal.
The X frame includes N number of symbol；N is positive integer；
The synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；M1 >=1 the N >.
The setup module is additionally operable to that the start bit that the M1 symbol that the synchronizing signal S1 is occupied is located at X frame is arranged
It sets.
The setup module, the symbolic number for being additionally operable to the primary synchronization signal occupancy of setting synchronizing signal S1 are greater than or equal to institute
State the symbolic number of secondary synchronization signal occupancy.
The setup module is additionally operable to, when the symbolic number that the primary synchronization signal occupies is two or more, adopt
With identical sequence described two or more than two symbols are generated by different arrangements or by different signal processing modes
The primary synchronization signal of upper transmission.
The sending method of synchronizing signal provided by the invention passes through the setting to synchronizing signal structure and transmission sequence, example
If the first communication node sends synchronizing signal S1 in X frame, synchronizing signal S2, synchronizing signal S1 and S2 are sent in (X+K) frame
It is different；Synchronizing signal S1 and synchronizing signal S2 is by identical sequence by different arrangements or by unlike signal processing mode
The means such as generation, optimize existing synchronization channel design, reduce the required precision to crystal oscillator, so as to effectively subtract
The power consumption and implementation complexity of small terminal preferably meet data user and the wireless communication industry future development of high speed development
Needs.
Description of the drawings
Fig. 1 is a kind of transmission flow schematic diagram of synchronizing signal of the present invention；
Fig. 2 is the frame structure schematic diagram one that the present invention sends synchronizing signal；
Fig. 3 is the frame structure schematic diagram two that the present invention sends synchronizing signal；
Fig. 4 is the frame structure schematic diagram three that the present invention sends synchronizing signal；
Fig. 5 is the transmission flow schematic diagram of another synchronizing signal of the present invention；
Fig. 6 is the frame structure schematic diagram four that the present invention sends synchronizing signal.
Specific implementation mode
A kind of sending method such as Fig. 1 of synchronizing signal provided by the invention includes：
Step 101, the first communication node sends synchronizing signal S1 in X frame, and synchronizing signal S2 is sent in (X+K) frame,
Synchronizing signal S1 and S2 are different, K >=1.
Step 102, the second communication node receives synchronizing signal S1 and S2 in X frame and (X+K frames) respectively.Specifically：
Second communication node obtains synchronizing information after X frame receives synchronizing signal S1, by synchronizing signal S1；Synchronizing information includes：
Timing estimation and/or offset estimation；Second communication node receives according to timing estimation and/or offset estimation from (X+K) frame same
Walk signal S2.
Wherein, X frame and (X+K) frame respectively include N number of symbol；N is positive integer；Synchronizing signal S1 occupies the N of X frame
M1 symbol in a symbol；Synchronizing signal S2 occupies M2 symbol in N number of symbol of (X+K) frame；M1 it is equal with M2 or
It is unequal；M1 >=1 N >, M2 >=1 N >.
The M1 symbol that synchronizing signal S1 is occupied is located at the initial position of X frame；The M2 symbol that synchronizing signal S2 is occupied
Positioned at the initial position of (X+K) frame.
Synchronizing signal S1 and synchronizing signal S2 is by identical sequence by different arrangements or by unlike signal processing mode
It generates.
When synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, synchronizing signal S1 is main synchronous with S2's
Signal is generated by identical sequence by different arrangements or unlike signal processing mode；Alternatively,
Based on synchronizing signal S2, when secondary synchronization signal structure, the primary synchronization signal and synchronizing signal S1 of synchronizing signal S2 by
Identical sequence is generated by different arrangements or unlike signal processing mode.
Above-mentioned identical sequence is the constant envelope zero auto-correlation sequence that length is Y.
Further, when the symbol that frame includes is OFDM symbol, the value of Y is no more than the available son of an OFDM symbol
1/ (2^n) of carrier wave or all subcarriers, n are the integer more than or equal to 0；Alternatively,
From the combined sequence that selection is used for generating synchronizing signal in constant envelope zero auto-correlation arrangement set, at least two
The sum of sequence identifier of constant envelope zero auto-correlation sequence is Y, and sequence identifier makes a living into constant envelope zero that length is Y from phase
Close the number Z relatively prime with Y used when sequence.
Further, above-mentioned different arrangement includes：One kind being arranged as sequence and repeats P composition in the time domain；It is another
It is arranged as sequence and repeats P composition by being conjugated symmetrical mode in the time domain, P is the integer more than 1.
When synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, synchronizing signal S1 and synchronizing signal S2
Secondary synchronization signal it is identical, by length be G Golay sequences generate；Alternatively,
Based on synchronizing signal S2, when secondary synchronization signal structure, the secondary synchronization signal of synchronizing signal S2 is G's by length
Golay sequences generate.
Further, when the symbol that frame includes is OFDM symbol, the value of G is no more than the available sub- load of an OFDM symbol
1/ (2^n) of wave or all subcarriers, n are the integer more than or equal to 0.
The sequence number that Golay arrangement sets include is more than or equal to the sequence that constant envelope zero auto-correlation arrangement set includes
Number.
Illustrate that the first communication node sends synchronizing signal S1 in X frame with reference to embodiment one to nine, in (X+K) frame
Send the implementation process of synchronizing signal S2.
Embodiment one
In communication system, X frame, (X+K) frame respectively include N number of symbol, K >=1, it is preferable that symbol is OFDM symbol.
First communication node is sent respectively using M1, M2 symbols in N number of symbol in X frame, (X+K) frame and is synchronized
Signal S1, S2, wherein synchronizing signal S1 and synchronizing signal S2 are different, it is preferable that for example shown in Fig. 2, M1=M2 is equal to 1,
Synchronizing signal is located at the frame head of corresponding frame：Synchronizing signal S1 is located on the symbol 1 of X frame, synchronizing signal S2 is located at (X+K) frame
Symbol 1 on.
Synchronizing signal S1 and synchronizing signal S2 can be generated by identical sequence (sequence) by different arrangements.
Preferably, which is the constant envelope zero auto-correlation sequence that length is Y, can also be other two-value sequences
Row, wherein the value of Y be no more than the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n be more than etc.
In 0 integer, such as n=2.Further, selection is used for generating synchronizing signal from constant envelope zero auto-correlation arrangement set
Combined sequence in, the sum of sequence identifier of at least two constant envelope zero auto-correlation sequences is Y, wherein sequence identifier is
Generate the number Z relatively prime with Y used when the constant envelope zero auto-correlation sequence that length is Y.
About different arrangement modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, arrangement can be [1+i
1-i 2+i 2-i 1+i 1-i 2+i 2-i], i.e. [sequence sequence] pattern is equivalent to sequence and repeats in the time domain
It has sent once, can also be repeated as many times；Either [1+i 1-i 2+i 2-i 2+i 2-i 1+i 1-i], i.e. [sequence
The conjugate symmetric sequence of sequence] pattern.Any one pattern of rows and columns all can serve as synchronizing signal S1 or S2, but ensure
The primary synchronization signal of synchronizing signal S1 and S2 is different.
Second communication node receives synchronizing signal S1 and synchronizing signal S2 in X frame and (X+K frames) respectively, obtains and synchronizes
Information, it is preferable that the second communication node obtains synchronizing information after X frame receives synchronizing signal S1, by synchronizing signal S1；Together
Walking information includes：Timing estimation and/or offset estimation；Second communication node is according to timing estimation and/or offset estimation from (X+
K) frame receives synchronizing signal S2.
Embodiment two
In communication system, X frame, (X+K) frame respectively include N number of symbol, K >=1, it is preferable that symbol is OFDM symbol.
First communication node is sent respectively using M1, M2 symbols in N number of symbol in X frame, (X+K) frame and is synchronized
Signal S1, S2, wherein synchronizing signal S1 and synchronizing signal S2 are different, it is preferable that for example shown in Fig. 2, M1=M2 is equal to 1,
Synchronizing signal is located at the frame head of corresponding frame：Synchronizing signal S1 is located on the symbol 1 of X frame, synchronizing signal S2 is located at (X+K) frame
Symbol 1 on.
Synchronizing signal S1 and synchronizing signal S2 can be generated by identical sequence (sequence) by different arrangements.Its
In, the sequence of selection is identical as described in embodiment one, and details are not described herein again.
About different arrangement modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, arrangement can be [1+i
1-i 2+i 2-i 2+i 2-i 1+i 1-i], i.e. [conjugate symmetric sequence of sequence sequence] pattern can also be
[the conjugate symmetric sequence sequence conjugate symmetric sequences of the conjugate symmetric sequence sequence of sequence sequence] mould
Formula, the conjugate symmetric sequence for being equivalent to sequence repeat to have sent repeatedly in the time domain.Any one pattern of rows and columns all can serve as
Synchronizing signal S1 or S2, but to ensure that the primary synchronization signal of synchronizing signal S1 and S2 is different.
Second communication node received respectively in X frame and (X+K frames) process of synchronizing signal S1 and synchronizing signal S2 with
Embodiment one is identical, and details are not described herein again.
Embodiment three
In communication system, X frame, (X+K) frame respectively include N number of symbol, K >=1, it is preferable that symbol is OFDM symbol.
First communication node is sent respectively using M1, M2 symbols in N number of symbol in X frame, (X+K) frame and is synchronized
Signal S1, S2, wherein synchronizing signal S1 and synchronizing signal S2 are different, it is preferable that for example shown in Fig. 2, M1=M2 is equal to 1,
Synchronizing signal is located at the frame head of corresponding frame：Synchronizing signal S1 is located on the symbol 1 of X frame, synchronizing signal S2 is located at (X+K) frame
Symbol 1 on.
Synchronizing signal S1 and synchronizing signal S2 can pass through different signal processing sides by identical sequence (Sequence)
Formula generates.Wherein, the sequence of selection is identical as described in embodiment one, and details are not described herein again.
About different signal processing modes, i.e., the mode of time domain sequences how is generated, can be obtained by multiple means,
For example, be a kind of mode from frequency-domain transform to time domain, or it is also a kind of mode directly to carry out processing in time domain.
It is illustrated by taking the signal processing mode from frequency-domain transform to time domain as an example below.
By taking sequence=[1+i 1-i 2+i 2-i] as an example, sequence=[1+i 1-i 2+i 2-i] is mapped to one
On all or part of available subcarrier of a OFDM symbol and carry out IFFT transformation, the time-domain signal of acquisition, such as every one
Subcarrier is mapped, and will form two periods of same waveform after being converted by IFFT in OFDM symbol, it is preferable that can
To carry out conjugation symmetry operation to one in the two periodic signals, i.e., one of two periodic signals can be used as synchronous letter
Number S1, another can be used as synchronizing signal S2 after carrying out conjugation symmetry operation.
Second communication node received respectively in X frame and (X+K frames) process of synchronizing signal S1 and synchronizing signal S2 with
Embodiment one is identical, and details are not described herein again.
Example IV
In communication system, X frame, (X+K) frame respectively include N number of symbol, K >=1, it is preferable that symbol is OFDM symbol.
First communication node is sent respectively using M1, M2 symbols in N number of symbol in X frame, (X+K) frame and is synchronized
Signal S1, S2, wherein synchronizing signal S1 and synchronizing signal S2 are different, it is preferable that for example shown in Fig. 3, M1=M2 is equal to 2,
Synchronizing signal is located at the frame head of corresponding frame：Synchronizing signal S1 is located on the symbol 1 and symbol 2 of X frame, synchronizing signal S2 is located at the
(X+K) on the symbol 1 and symbol 2 of frame.
Further, synchronizing signal S1 and S2 is all made of main and auxiliary synchronizing signal structure, wherein synchronizing signal S1's and S2
Primary synchronization signal is different；Synchronizing signal S1 is identical with the secondary synchronization signal of synchronizing signal S2.
Wherein, the primary synchronization signal of synchronizing signal S1 and S2 is to pass through different arrangements by identical sequence (Sequence)
It generates.Wherein, the sequence of selection is identical as described in embodiment one, and details are not described herein again.
About different arrangement modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, arrangement can be [1+i
1-i 2+i 2-i 1+i 1-i 2+i 2-i], i.e. [sequence sequence] pattern of rows and columns is equivalent to sequence in the time domain
Repetition has sent once, can also be repeated as many times, either [1+i 1-i 2+i 2-i 2+i 2-i 1+i 1-i], i.e.,
[conjugate symmetric sequence of sequence sequence] pattern of rows and columns, wherein any one pattern of rows and columns all can serve as to synchronize
The primary synchronization signal of signal S1 or S2, but to ensure that the primary synchronization signal of synchronizing signal S1 and S2 is different.
Preferably, the secondary synchronization signal of synchronizing signal S1 and S2 is generated by the Golay sequences that length is G, the value of G
It is the integer more than or equal to 0 no more than the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n.
It is greater than or equal to using the sequence number that Golay arrangement sets include when generating secondary synchronization signal and generates main synchronization
The sequence number that the constant envelope zero auto-correlation arrangement set used when signal includes, for example, can be used for secondary synchronization signal
Golay sequences have 264, and the Sequence sequences that can be used for primary synchronization signal have 3 or 4.From above two arrangement set
When middle selection sequence, the sequence with low peak average ratio, good auto-correlation or cross correlation etc. can be selected.
Second communication node received respectively in X frame and (X+K frames) process of synchronizing signal S1 and synchronizing signal S2 with
Embodiment one is identical, and details are not described herein again.
Embodiment five
In communication system, X frame, (X+K) frame respectively include N number of symbol, it is preferable that symbol is OFDM symbol.
First communication node is sent respectively using M1, M2 symbols in N number of symbol in X frame, (X+K) frame and is synchronized
Signal S1, S2, wherein synchronizing signal S1 and synchronizing signal S2 are different, it is preferable that for example shown in Fig. 3, M1=M2 is equal to 2,
Synchronizing signal is located at the frame head of corresponding frame：Synchronizing signal S1 is located on the symbol 1 and symbol 2 of X frame, synchronizing signal S2 is located at the
(X+K) on the symbol 1 and symbol 2 of frame.
Further, synchronizing signal S1 and S2 is all made of main and auxiliary synchronizing signal structure, wherein synchronizing signal S1's and S2
Primary synchronization signal is different；Synchronizing signal S1 is identical with the secondary synchronization signal of synchronizing signal S2.
Wherein, the primary synchronization signal of synchronizing signal S1 and S2 is to pass through different arrangements by identical sequence (Sequence)
It generates.Wherein, the sequence of selection is identical as described in embodiment one, and details are not described herein again.
About different arrangement modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, arrangement can be [1+i
1-i 2+i 2-i 2+i 2-i 1+i 1-i], i.e. [conjugate symmetric sequence of sequence sequence] pattern can also be
[conjugation of the conjugate symmetric sequence sequence of the conjugate symmetric sequence sequence of sequence sequence piles sequence]
Pattern, the conjugate symmetric sequence for being equivalent to sequence repeat to send repeatedly in the time domain.Wherein, any one pattern of rows and columns can
As the primary synchronization signal of synchronizing signal S1 or S2, but to ensure that the primary synchronization signal of synchronizing signal S1 and S2 is different.
Preferably, the secondary synchronization signal of synchronizing signal S1 and S2 is generated by the Golay sequences that length is G, the value of G
It is the integer more than or equal to 0 no more than the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n.
It is greater than or equal to using the sequence number that Golay arrangement sets include when generating secondary synchronization signal and generates main synchronization
The sequence number that the constant envelope zero auto-correlation arrangement set used when signal includes, for example, can be used for secondary synchronization signal
Golay sequences have 264, and the Sequence sequences that can be used for primary synchronization signal have 3 or 4.From above two arrangement set
When middle selection sequence, the sequence with low peak average ratio, good auto-correlation or cross correlation etc. can be selected.
Second communication node received respectively in X frame and (X+K frames) process of synchronizing signal S1 and synchronizing signal S2 with
Embodiment one is identical, and details are not described herein again.
Embodiment six
In communication system, X frame, (X+K) frame respectively include N number of symbol, it is preferable that symbol is OFDM symbol.
First communication node is sent respectively using M1, M2 symbols in N number of symbol in X frame, (X+K) frame and is synchronized
Signal S1, S2, wherein synchronizing signal S1 and synchronizing signal S2 are different, it is preferable that for example shown in Fig. 3, M1=M2 is equal to 2,
Synchronizing signal is located at the frame head of corresponding frame：Synchronizing signal S1 is located on the symbol 1 and symbol 2 of X frame, synchronizing signal S2 is located at the
(X+K) on the symbol 1 and symbol 2 of frame.
Further, synchronizing signal S1 and S2 is all made of main and auxiliary synchronizing signal structure, wherein synchronizing signal S1's and S2
Primary synchronization signal is different；Synchronizing signal S1 is identical with the secondary synchronization signal of synchronizing signal S2.
Wherein, the primary synchronization signal of synchronizing signal S1 and S2 is to pass through different signals by identical sequence (Sequence)
What processing mode generated.Wherein, the sequence of selection is identical as described in embodiment one, and details are not described herein again.
About different signal processing modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, signal processing mode
Can be：Sequence=[1+i 1-i 2+i 2-i] is mapped on all or part of available subcarrier of an OFDM symbol
IFFT transformation is carried out, obtains time-domain signal, such as mapped every a subcarrier, it will be in OFDM after being converted by IFFT
Two periods of same waveform are formed in symbol, it is preferable that can carry out being conjugated to one in the two periodic signals symmetrical
Operation.
Preferably, the secondary synchronization signal of synchronizing signal S1 and S2 is generated by the Golay sequences that length is G, the value of G
It is the integer more than or equal to 0 no more than the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n.
It is greater than or equal to using the sequence number that Golay arrangement sets include when generating secondary synchronization signal and generates main synchronization
The sequence number that the constant envelope zero auto-correlation arrangement set used when signal includes, for example, can be used for secondary synchronization signal
Golay sequences have 264, and the Sequence sequences that can be used for primary synchronization signal have 3 or 4.From above two arrangement set
When middle selection sequence, the sequence with low peak average ratio, good auto-correlation or cross correlation etc. can be selected.
Second communication node received respectively in X frame and (X+K frames) process of synchronizing signal S1 and synchronizing signal S2 with
Embodiment one is identical, and details are not described herein again.
Embodiment seven
In communication system, X frame, (X+K) frame respectively include N number of symbol, it is preferable that symbol is OFDM symbol.
First communication node is sent respectively using M1, M2 symbols in N number of symbol in X frame, (X+K) frame and is synchronized
Signal S1, S2, wherein synchronizing signal S1 and synchronizing signal S2 are different, it is preferable that for example shown in Fig. 4, M1 is equal to 1, M2 etc.
(can also be that M1 is equal to the frame head that 2, M2 is located at corresponding frame equal to 1) synchronizing signal in 2：Synchronizing signal S1 is located at the symbol of X frame
On number 1, synchronizing signal S2 is located on the symbol 1 and symbol 2 of (X+K) frame.
Wherein, synchronizing signal S2 uses main and auxiliary synchronizing signal structure, and unlike signal S1 is not main and auxiliary synchronizing signal structure,
Then the primary synchronization signal of synchronizing signal S2 from synchronizing signal S1 is given birth to by different arrangements by identical sequence (Sequence)
At.Wherein, the sequence of selection is identical as described in embodiment one, and details are not described herein again.
About different arrangement modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, arrangement can be [1+i
1-i 2+i 2-i 1+i 1-i 2+i 2-i], i.e. [sequence sequence] pattern is equivalent to sequence and repeats in the time domain
It has sent once, can also be repeated as many times, either [1+i 1-i 2+i 2-i 2+i 2-i 1+i1-i], i.e. [sequence
The conjugate symmetric sequence of sequence] pattern.Wherein, any one pattern of rows and columns all can serve as the main synchronization of synchronizing signal S2
Signal and synchronizing signal S1, but to ensure that the primary synchronization signal of synchronizing signal S2 is different from synchronizing signal S1.
Preferably, the secondary synchronization signal of synchronizing signal S2 is generated by the Golay sequences that length is G, and the value of G does not surpass
It crosses the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n is integer more than or equal to 0.
It is greater than or equal to using the sequence number that Golay arrangement sets include when generating secondary synchronization signal and generates main synchronization
The sequence number that the constant envelope zero auto-correlation arrangement set used when signal includes, for example, can be used for secondary synchronization signal
Golay sequences have 264, and the Sequence sequences that can be used for primary synchronization signal have 3 or 4.From above two arrangement set
When middle selection sequence, the sequence with low peak average ratio, good auto-correlation or cross correlation etc. can be selected.
Second communication node received respectively in X frame and (X+K frames) process of synchronizing signal S1 and synchronizing signal S2 with
Embodiment one is identical, and details are not described herein again.
Embodiment eight
In communication system, X frame, (X+K) frame respectively include N number of symbol, it is preferable that symbol is OFDM symbol.
First communication node is sent respectively using M1, M2 symbols in N number of symbol in X frame, (X+K) frame and is synchronized
Signal S1, S2, wherein synchronizing signal S1 and synchronizing signal S2 are different, it is preferable that for example shown in Fig. 4, M1 is equal to 1, M2 etc.
(can also be that M1 is equal to the frame head that 2, M2 is located at corresponding frame equal to 1) synchronizing signal in 2：Synchronizing signal S1 is located at the symbol of X frame
On number 1, synchronizing signal S2 is located on the symbol 1 and symbol 2 of (X+K) frame.
Wherein, synchronizing signal S2 uses main and auxiliary synchronizing signal structure, and synchronizing signal S1 is not main and auxiliary synchronizing signal structure,
Then the primary synchronization signal of synchronizing signal S2 from synchronizing signal S1 is given birth to by different arrangements by identical sequence (Sequence)
At.Wherein, the sequence of selection is identical as described in embodiment one, and details are not described herein again.
About different arrangement modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, arrangement can be [1+i
1-i 2+i 2-i 2+i 2-i 1+i 1-i], i.e. [conjugate symmetric sequence of sequence sequence] pattern can also be
[conjugation of the conjugate symmetric sequence sequence of the conjugate symmetric sequence sequence of sequence sequence piles sequence]
Pattern, the conjugate symmetric sequence for being equivalent to sequence repeat to send repeatedly in the time domain.Wherein, any one pattern of rows and columns can
As the primary synchronization signal and synchronizing signal S1 of synchronizing signal S2, but to ensure the primary synchronization signal of synchronizing signal S2 with it is synchronous
Signal S1 is different.
Preferably, the secondary synchronization signal of synchronizing signal S2 is generated by the Golay sequences that length is G, and the value of G does not surpass
It crosses the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n is integer more than or equal to 0.
It is greater than or equal to using the sequence number that Golay arrangement sets include when generating secondary synchronization signal and generates main synchronization
The sequence number that the constant envelope zero auto-correlation arrangement set used when signal includes, for example, can be used for secondary synchronization signal
Golay sequences have 264, and the Sequence sequences that can be used for primary synchronization signal have 3 or 4.From above two arrangement set
When middle selection sequence, the sequence with low peak average ratio, good auto-correlation or cross correlation etc. can be selected.
Second communication node received respectively in X frame and (X+K frames) process of synchronizing signal S1 and synchronizing signal S2 with
Embodiment one is identical, and details are not described herein again.
Embodiment nine
In communication system, X frame, (X+K) frame respectively include N number of symbol, it is preferable that symbol is OFDM symbol.
First communication node is sent respectively using M1, M2 symbols in N number of symbol in X frame, (X+K) frame and is synchronized
Signal S1, S2, wherein synchronizing signal S1 and synchronizing signal S2 are different, it is preferable that for example shown in Fig. 4, M1 is equal to 1, M2 etc.
(can also be that M1 is equal to the frame head that 2, M2 is located at corresponding frame equal to 1) synchronizing signal in 2：Synchronizing signal S1 is located at the symbol of X frame
On number 1, synchronizing signal S2 is located on the symbol 1 and symbol 2 of (X+K) frame.
Wherein, synchronizing signal S2 uses main and auxiliary synchronizing signal structure, and synchronizing signal S1 is not main and auxiliary synchronizing signal structure,
The primary synchronization signal of synchronizing signal S2 is to pass through different signal processings by identical sequence (Sequence) from synchronizing signal S1
What mode generated.Wherein, the sequence of selection is identical as described in embodiment one, and details are not described herein again.
About different signal processing modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, signal processing mode
Can be：Sequence=[1+i 1-i 2+i 2-i] is mapped on all or part of available subcarrier of an OFDM symbol,
And IFFT transformation is carried out, and time-domain signal is obtained, such as is mapped every a subcarrier, it will be after being converted by IFFT
Two periods of same waveform are formed in OFDM symbol, it is preferable that can be conjugated to one in the two periodic signals
Symmetry operation.
Preferably, the secondary synchronization signal of synchronizing signal S2 is generated by the Golay sequences that length is G, and the value of G does not surpass
It crosses the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n is integer more than or equal to 0.
It is greater than or equal to using the sequence number that Golay arrangement sets include when generating secondary synchronization signal and generates main synchronization
The sequence number that the constant envelope zero auto-correlation arrangement set used when signal includes, for example, can be used for secondary synchronization signal
Golay sequences have 264, and the Sequence sequences that can be used for primary synchronization signal have 3 or 4.From above two arrangement set
When middle selection sequence, the sequence with low peak average ratio, good auto-correlation or cross correlation etc. can be selected.
Second communication node received respectively in X frame and (X+K frames) process of synchronizing signal S1 and synchronizing signal S2 with
Embodiment one is identical, and details are not described herein again.
In order to realize above-mentioned sending method, the present invention provides a kind of sending devices of synchronizing signal, including：Setup module
And sending module, wherein：
Setup module keeps the two different for synchronizing signal S1 and S2 to be arranged；
Sending module sends synchronizing signal S2, K >=1 for sending synchronizing signal S1 in X frame in (X+K) frame.
The device further includes：
Receiving module obtains synchronizing information after receiving synchronizing signal S1 from X frame by synchronizing signal S1；It is synchronous
Information includes：Timing estimation and/or offset estimation；It receives and synchronizes from (X+K) frame further according to timing estimation and/or offset estimation
Signal S2.
X frame and (X+K) frame respectively include N number of symbol；
Synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；Synchronizing signal S2 occupies the N number of of (X+K) frame
M2 symbol in symbol；
M1 is equal or unequal with M2；M1 >=1 N >, M2 >=1 N >.
Setup module is additionally operable to the initial position that the M1 symbol that setting synchronizing signal S1 is occupied is located at X frame；Setting is same
The M2 symbol that step signal S2 is occupied is located at the initial position of (X+K) frame.
Setup module is additionally operable to generate synchronization by different arrangements or unlike signal processing mode using identical sequence
Signal S1 and synchronizing signal S2.
When synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, setup module is additionally operable to using identical
Sequence the primary synchronization signal of synchronizing signal S1 and S2 is generated by different arrangements or unlike signal processing mode；
Based on synchronizing signal S2, when secondary synchronization signal structure, setup module is additionally operable to using identical sequence by different
Arrangement or unlike signal processing mode generate the primary synchronization signal and synchronizing signal S1 of synchronizing signal S2.
Setup module is additionally operable to use constant envelope zero auto-correlation sequence of the length for Y as identical sequence.
When the symbol that frame includes is OFDM symbol, the value of Y is no more than the available subcarrier or all of an OFDM symbol
1/ (2^n) of subcarrier, n are the integer more than or equal to 0；Alternatively,
From the combined sequence that selection is used for generating synchronizing signal in constant envelope zero auto-correlation arrangement set, at least two
The sum of sequence identifier of constant envelope zero auto-correlation sequence is Y, and sequence identifier makes a living into constant envelope zero that length is Y from phase
Close the number Z relatively prime with Y used when sequence.
Different arrangements include：One kind being arranged as sequence and repeats P composition in the time domain；Another kind be arranged as sequence when
P composition is repeated by being conjugated symmetrical mode on domain, P is the integer more than 1.
Setup module is additionally operable to when synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, using length
Degree is that the Golay sequences of G generate the secondary synchronization signal of synchronizing signal S1 and synchronizing signal S2；Synchronizing signal S1 and synchronizing signal S2
Secondary synchronization signal it is identical；Alternatively, be additionally operable to based on synchronizing signal S2, secondary synchronization signal structure when, use length for G's
Golay sequences generate the secondary synchronization signal of synchronizing signal S2；
When the symbol that frame includes is OFDM symbol, the value of G is no more than the available subcarrier or all of an OFDM symbol
1/ (2^n) of subcarrier, n are the integer more than or equal to 0.
Setup module, the sequence number that the Golay arrangement sets for being additionally operable to use include are more than or equal to constant envelope zero certainly
The sequence number that correlated series set includes.
The present invention also provides the sending methods of another synchronizing signal, as shown in figure 5, including：
Step 501, the first communication node sends synchronizing signal S1 in X frame, based on synchronizing signal S1, secondary synchronization signal knot
Structure.
Step 502, the second communication node receives synchronizing signal S1 by X frame.Specifically, the second communication node is from X
After frame receives a primary synchronization signal, synchronizing information is obtained by the primary synchronization signal；Synchronizing information includes：Timing estimation
And/or offset estimation；Second communication node receives subsequent auxiliary synchronous letter according to timing estimation and/or offset estimation from X frame
Number or subsequent primary synchronization signal and secondary synchronization signal.
Wherein, X frame includes N number of symbol；N is positive integer；Synchronizing signal S1 occupies M1 in N number of symbol of X frame
Symbol；M1 >=1 N >.
Preferably, the M1 symbol that synchronizing signal S1 is occupied is located at the initial position of X frame.
Further, the symbolic number that the primary synchronization signal of synchronizing signal S1 occupies is greater than or equal to what secondary synchronization signal occupied
Symbolic number.
Primary synchronization signal occupy symbolic number be two or more, the master sent on two or more symbols
Synchronizing signal is generated by identical sequence by different arrangements or by different signal processing modes.
The real-time mistake of synchronizing signal S1 is sent in X frame with reference to the first communication node of explanation of embodiment ten to ten two
Journey.
Embodiment ten
In communication system, X frame includes N number of symbol, it is preferable that symbol is OFDM symbol.
First communication node sends synchronizing signal S1 in X frame using M symbol in N number of symbol, it is preferable that synchronizing signal
Based on S1, secondary synchronization signal structure, as shown in fig. 6, in X frame M be equal to 3, wherein primary synchronization signal occupies 2 symbols, auxiliary
Synchronizing signal occupies 1 symbol, and synchronizing signal is located at the frame head of corresponding frame：Primary synchronization signal occupies the first two symbol (symbol 1
With symbol 2), secondary synchronization signal occupies the 3rd symbol.
Primary synchronization signal 1 from 2 is generated by different arrangements by identical sequence (Sequence).Wherein, it chooses
Sequence it is identical as described in embodiment one, details are not described herein again.
About different arrangement modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, arrangement can be [1+i
1-i 2+i 2-i 1+i 1-i 2+i 2-i], i.e. [sequence sequence] pattern is equivalent to sequence and repeats in the time domain
It has sent once, can also be repeated as many times, either [1+i 1-i 2+i 2-i 2+i 2-i 1+i 1-i], i.e. [sequence
The conjugate symmetric sequence of sequence] pattern.Wherein, any one pattern of rows and columns all can serve as the main synchronization of synchronizing signal S1
Signal 1 or 2, but to ensure that primary synchronization signal 1 is different from primary synchronization signal 2.
Preferably, the secondary synchronization signal of synchronizing signal S1 and S2 is generated by the Golay sequences that length is G, the value of G
It is the integer more than or equal to 0 no more than the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n.
It generates the sequence number that the Golay arrangement sets used when secondary synchronization signal include and is greater than or equal to generation master together
The sequence number that the constant envelope zero auto-correlation arrangement set used when signal includes is walked, for example, can be used for secondary synchronization signal
Golay sequences have 264, the Sequence sequences that can be used for primary synchronization signal have 3 or 4.From above two sequence sets
When choosing sequence in conjunction, the sequence with low peak average ratio, good auto-correlation or cross correlation etc. can be selected.
Second communication node receives synchronizing signal S1 in X frame respectively, obtains synchronizing information, it is preferable that the second communication section
Point obtains synchronizing information after X frame receives first primary synchronization signal, by first primary synchronization signal；Synchronizing information packet
It includes：Timing estimation and/or offset estimation；Second communication node receives according to timing estimation and/or offset estimation from X frame follow-up
Primary synchronization signal and secondary synchronization signal.
Embodiment 11
In communication system, X frame includes N number of symbol, it is preferable that symbol is OFDM symbol.
First communication node sends synchronizing signal S1 in X frame using M symbol in N number of symbol, it is preferable that synchronizing signal
Based on S1, secondary synchronization signal structure, as shown in fig. 6, in X frame M be equal to 3, wherein primary synchronization signal occupies 2 symbols, auxiliary
Synchronizing signal occupies 1 symbol, and synchronizing signal is located at the frame head of corresponding frame：Primary synchronization signal occupies the first two symbol (symbol 1
With symbol 2), secondary synchronization signal occupies the 3rd symbol.
Primary synchronization signal 1 from 2 is generated by different arrangements by identical sequence (Sequence).Wherein, it chooses
Sequence it is identical as described in embodiment one, details are not described herein again.
About different arrangement modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, arrangement can be [1+i
1-i 2+i 2-i 2+i 2-i 1+i 1-i], i.e. [conjugate symmetric sequence of sequence sequence] pattern can also be
[conjugation of the conjugate symmetric sequence sequence of the conjugate symmetric sequence sequence of sequence sequence piles sequence]
Pattern.Wherein, any one pattern of rows and columns all can serve as the primary synchronization signal 1 or 2 of synchronizing signal S1, but ensure main synchronization
Signal 1 is different from primary synchronization signal 2.
Preferably, the secondary synchronization signal of synchronizing signal S1 and S2 is generated by the Golay sequences that length is G, the value of G
It is the integer more than or equal to 0 no more than the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n.
It generates the sequence number that the Golay arrangement sets used when secondary synchronization signal include and is greater than or equal to generation master together
The sequence number that the constant envelope zero auto-correlation arrangement set used when signal includes is walked, for example, can be used for secondary synchronization signal
Golay sequences have 264, the Sequence sequences that can be used for primary synchronization signal have 3 or 4.From above two sequence sets
When choosing sequence in conjunction, the sequence with low peak average ratio, good auto-correlation or cross correlation etc. can be selected.
The process that second communication node receives synchronizing signal S1 in X frame is identical as embodiment ten, and details are not described herein again.
Embodiment 12
In communication system, X frame includes N number of symbol, it is preferable that symbol is OFDM symbol.
First communication node sends synchronizing signal S1 in X frame using M symbol in N number of symbol, it is preferable that synchronizing signal
Based on S1, secondary synchronization signal structure, as shown in fig. 6, in X frame M be equal to 3, wherein primary synchronization signal occupies 2 symbols, auxiliary
Synchronizing signal occupies 1 symbol, and synchronizing signal is located at the frame head of corresponding frame：Primary synchronization signal occupies the first two symbol (symbol 1
With symbol 2), secondary synchronization signal occupies the 3rd symbol.
Primary synchronization signal 1 from 2 is generated by different signal processing modes by identical sequence (Sequence).Its
In, the sequence of selection is identical as described in embodiment one, and details are not described herein again.
About different signal processing modes, by taking sequence=[1+i 1-i 2+i 2-i] as an example, signal processing mode
Can be sequence=[1+i 1-i 2+i 2-i] by being mapped to all or part of available subcarrier of an OFDM symbol
It is upper to carry out what the time-domain signal that IFFT transformation obtains obtained, such as mapped every a subcarrier, after being converted by IFFT
Two periods of same waveform will be formed in OFDM symbol, it is preferable that can to one in the two periodic signals into
Row conjugation symmetry operation.
Preferably, the secondary synchronization signal of synchronizing signal S1 and S2 is generated by the Golay sequences that length is G, the value of G
It is the integer more than or equal to 0 no more than the available subcarrier of OFDM symbol or 1/ (2^n) of all subcarriers, n.
It generates the sequence number that the Golay arrangement sets used when secondary synchronization signal include and is greater than or equal to generation master together
The sequence number that the constant envelope zero auto-correlation arrangement set used when signal includes is walked, for example, can be used for secondary synchronization signal
Golay sequences have 264, the Sequence sequences that can be used for primary synchronization signal have 3 or 4.From above two sequence sets
When choosing sequence in conjunction, the sequence with low peak average ratio, good auto-correlation or cross correlation etc. can be selected.
The process that second communication node receives synchronizing signal S1 in X frame is identical as embodiment ten, and details are not described herein again.
In order to realize sending method shown in fig. 5, the present invention provides a kind of sending devices, including setup module and transmission
Module, wherein：
Setup module makes synchronizing signal S1 have main and auxiliary synchronizing signal structure for synchronizing signal S1 to be arranged；
Sending module, for sending synchronizing signal S1 in X frame.
The device further includes receiving module, after a primary synchronization signal for receiving synchronizing signal S1 from X frame, is led to
It crosses primary synchronization signal and obtains synchronizing information；Synchronizing information includes：Timing estimation and/or offset estimation；Further according to timing estimation and/
Or offset estimation receives subsequent secondary synchronization signal or subsequent primary synchronization signal and secondary synchronization signal from X frame.
Wherein, X frame includes N number of symbol；N is positive integer；
Synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；M1 >=1 N >.
Setup module is additionally operable to the initial position that the M1 symbol that setting synchronizing signal S1 is occupied is located at X frame.
Setup module, the symbolic number for being additionally operable to the primary synchronization signal occupancy of setting synchronizing signal S1 are greater than or equal to auxiliary synchronization
The symbolic number that signal occupies.
Setup module is additionally operable to when the symbolic number that primary synchronization signal occupies is two or more, and use is identical
It is same that sequence by different arrangement or by different signal processing modes generates the master sent on two or more symbols
Walk signal.
It should be pointed out that in above-described embodiment one to embodiment 12, when there is main and auxiliary synchronizing signal, auxiliary synchronous letter
Number content depend on primary synchronization signal, referring to the different sequences that primary synchronization signal is sent can cause secondary synchronization signal using different
Sequence be corresponding to it.In addition, the occupied symbol of primary synchronization signal is than symbol the rising closer to frame that secondary synchronization signal occupies
Beginning position.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (25)
1. a kind of sending method of synchronizing signal, which is characterized in that this method includes：
First communication node sends synchronizing signal S1 in X frame, and synchronizing signal S2, the synchronizing signal are sent in (X+K) frame
S1 and S2 are different, K >=1；
Second communication node obtains synchronizing information after the X frame receives synchronizing signal S1, by synchronizing signal S1；It is described same
Walking information includes：Timing estimation and/or offset estimation；
Second communication node receives synchronizing signal S2 according to the timing estimation and/or offset estimation from (X+K) frame；Its
In,
Synchronizing signal S1 and synchronizing signal S2 is generated by identical sequence by different arrangements or by unlike signal processing mode；
When the synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, the synchronizing signal S1 is main synchronous with S2's
Signal is generated by identical sequence by different arrangements or unlike signal processing mode；Alternatively, based on the synchronizing signal S2,
When secondary synchronization signal structure, the primary synchronization signal and synchronizing signal S1 of the synchronizing signal S2 are by identical sequence by different
Arrangement or unlike signal processing mode generate；The identical sequence is the constant envelope zero auto-correlation sequence that length is Y, works as frame
Including symbol be OFDM symbol when, the value of Y be no more than OFDM symbol available subcarrier or all subcarriers 1/
(2^n), n are the integer more than or equal to 0.
2. the sending method of synchronizing signal according to claim 1, which is characterized in that
The X frame and (X+K) frame respectively include N number of symbol；N is positive integer；
The synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；The synchronizing signal S2 occupies (X+K) frame
N number of symbol in M2 symbol；
The M1 and M2 is equal or unequal；The N>M1≥1,N>M2≥1.
3. the sending method of synchronizing signal according to claim 2, which is characterized in that M1 that the synchronizing signal S1 is occupied
Symbol is located at the initial position of X frame；The M2 symbol that the synchronizing signal S2 is occupied is located at the initial position of (X+K) frame.
4. the sending method of synchronizing signal according to claim 1, which is characterized in that from the constant envelope zero auto-correlation sequence
In row set in combined sequence of the selection for generating synchronizing signal, the sequence of at least two constant envelope zero auto-correlation sequences
The sum of mark is Y, the sequence identifier be used when generating constant envelope zero auto-correlation sequence that the length is Y it is mutual with Y
The number Z of matter.
5. the sending method of synchronizing signal according to claim 1, which is characterized in that the different arrangement includes：It is a kind of
It is arranged as the sequence and repeats P composition in the time domain；It is symmetrical by being conjugated in the time domain that another kind is arranged as the sequence
Mode repeats P composition, and the P is the integer more than 1.
6. the sending method of synchronizing signal according to claim 1, which is characterized in that
When the synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, the synchronizing signal S1 and synchronous letter
The secondary synchronization signal of number S2 is identical, is generated by the Golay sequences that length is G；Alternatively,
Based on the synchronizing signal S2, when secondary synchronization signal structure, the secondary synchronization signal of the synchronizing signal S2 is G's by length
Golay sequences generate.
7. the sending method of synchronizing signal according to claim 6, which is characterized in that the symbol that the frame includes accords with for OFDM
Number when, the value of the G is no more than the available subcarrier of OFDM symbol or 1/ (2^n), the n of all subcarriers
For the integer more than or equal to 0.
8. according to the sending method of the synchronizing signal of claim 4,6 or 7, which is characterized in that Golay arrangement sets include
Sequence number is more than or equal to the sequence number that constant envelope zero auto-correlation arrangement set includes.
9. a kind of sending device of synchronizing signal, which is characterized in that including：Setup module and sending module, wherein：
The setup module keeps the two different for synchronizing signal S1 and S2 to be arranged；It is additionally operable to as the synchronizing signal S1 and same
When step signal S2 is main and auxiliary synchronizing signal structure, different arrangements or unlike signal processing side are passed through using identical sequence
Formula generates the primary synchronization signal of the synchronizing signal S1 and S2；It is additionally operable to based on the synchronizing signal S2, secondary synchronization signal knot
When structure, the main synchronization of the synchronizing signal S2 is generated by different arrangements or unlike signal processing mode using identical sequence
Signal and synchronizing signal S1
The sending module sends the synchronizing signal S2 for sending the synchronizing signal S1 in X frame in (X+K) frame,
K >=1；
Receiving module obtains synchronizing information after receiving synchronizing signal S1 from the X frame by synchronizing signal S1；It is described
Synchronizing information includes：Timing estimation and/or offset estimation；Further according to the timing estimation and/or offset estimation from the (X+
K) frame receives synchronizing signal S2.
10. the sending device of synchronizing signal according to claim 9, which is characterized in that the X frame and (X+K) frame point
It Bao Kuo not N number of symbol；N is positive integer；
The synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；The synchronizing signal S2 occupies (X+K) frame
N number of symbol in M2 symbol；
The M1 and M2 is equal or unequal；The N>M1≥1,N>M2≥1.
11. the sending device of synchronizing signal according to claim 10, which is characterized in that the setup module is additionally operable to set
Set the initial position that the M1 symbol that the synchronizing signal S1 is occupied is located at X frame；The M2 that the synchronizing signal S2 is occupied is set
A symbol is located at the initial position of (X+K) frame.
12. the sending device of synchronizing signal according to claim 9, which is characterized in that the setup module is additionally operable to use
Length is the constant envelope zero auto-correlation sequence of Y as the identical sequence.
13. according to the sending device of synchronizing signal described in claim 12, which is characterized in that
From the combined sequence that selection is used for generating synchronizing signal in the constant envelope zero auto-correlation arrangement set, at least two
The sum of sequence identifier of constant envelope zero auto-correlation sequence is Y, and the sequence identifier is to generate the constant packet that the length is Y
The number Z relatively prime with Y used when network zero auto-correlation sequence.
14. the sending device of synchronizing signal according to claim 9, which is characterized in that the different arrangement includes：It is a kind of
It is arranged as the sequence and repeats P composition in the time domain；It is symmetrical by being conjugated in the time domain that another kind is arranged as the sequence
Mode repeats P composition, and the P is the integer more than 1.
15. the sending device of synchronizing signal according to claim 9, which is characterized in that
The setup module is additionally operable to, when the synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, adopt
The Golay sequences for being G with length generate the secondary synchronization signal of synchronizing signal S1 and synchronizing signal S2；Synchronizing signal S1 and synchronous letter
The secondary synchronization signal of number S2 is identical；Alternatively, be additionally operable to based on the synchronizing signal S2, secondary synchronization signal structure when, using length
The secondary synchronization signal of synchronizing signal S2 is generated for the Golay sequences of G；
When the symbol that the frame includes is OFDM symbol, the value of the G is no more than the available sub- load of an OFDM symbol
1/ (2^n) of wave or all subcarriers, the n are the integer more than or equal to 0.
16. according to the sending device of the synchronizing signal of claim 13 or 15, which is characterized in that the setup module is also used
It is more than or equal to the sequence that constant envelope zero auto-correlation arrangement set includes in the sequence number that the Golay arrangement sets of use include
Number.
17. a kind of sending method of synchronizing signal, which is characterized in that including：
First communication node sends based on synchronizing signal S1, the synchronizing signal S1 in X frame, secondary synchronization signal structure；
After second communication node receives a primary synchronization signal of the synchronizing signal S1 from the X frame, pass through the master
Synchronous signal obtaining synchronizing information；The synchronizing information includes：Timing estimation and/or offset estimation；
Second communication node receives the auxiliary same of the synchronizing signal S1 according to timing estimation and/or offset estimation from the X frame
Walk signal or subsequent primary synchronization signal and secondary synchronization signal；Wherein,
Synchronizing signal S1 and synchronizing signal S2 is generated by identical sequence by different arrangements or by unlike signal processing mode；
When the synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, the synchronizing signal S1 is main synchronous with S2's
Signal is generated by identical sequence by different arrangements or unlike signal processing mode；Alternatively, based on the synchronizing signal S2,
When secondary synchronization signal structure, the primary synchronization signal and synchronizing signal S1 of the synchronizing signal S2 are by identical sequence by different
Arrangement or unlike signal processing mode generate；The identical sequence is the constant envelope zero auto-correlation sequence that length is Y, works as frame
Including symbol be OFDM symbol when, the value of Y be no more than OFDM symbol available subcarrier or all subcarriers 1/
(2^n), n are the integer more than or equal to 0.
18. according to the sending method of synchronizing signal described in claim 17, which is characterized in that
The X frame includes N number of symbol；N is positive integer；
The synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；The N>M1≥1.
19. according to the sending method of synchronizing signal described in claim 18, which is characterized in that
The symbolic number that the primary synchronization signal of the synchronizing signal S1 occupies is greater than or equal to the symbol that the secondary synchronization signal occupies
Number.
20. according to the sending method of synchronizing signal described in claim 19, which is characterized in that the symbol that the primary synchronization signal occupies
Number is two or more, and the primary synchronization signal sent on described two or more than two symbols is passed through by identical sequence
It crosses different arrangements or is generated by different signal processing modes.
21. a kind of sending device of synchronizing signal, which is characterized in that the device includes：Setup module and sending module, wherein：
The setup module makes the synchronizing signal S1 have main and auxiliary synchronizing signal structure for synchronizing signal S1 to be arranged；
The sending module, for sending the synchronizing signal S1 in X frame；
Receiving module after a primary synchronization signal for receiving synchronizing signal S1 from the X frame, passes through the main synchronization
Signal acquisition synchronizing information；The synchronizing information includes：Timing estimation and/or offset estimation；Further according to the timing estimation and/
Or offset estimation receives subsequent secondary synchronization signal or subsequent primary synchronization signal and secondary synchronization signal from the X frame；Its
In,
Synchronizing signal S1 and synchronizing signal S2 is generated by identical sequence by different arrangements or by unlike signal processing mode；
When the synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, the synchronizing signal S1 is main synchronous with S2's
Signal is generated by identical sequence by different arrangements or unlike signal processing mode；Alternatively, based on the synchronizing signal S2,
When secondary synchronization signal structure, the primary synchronization signal and synchronizing signal S1 of the synchronizing signal S2 are by identical sequence by different
Arrangement or unlike signal processing mode generate；The identical sequence is the constant envelope zero auto-correlation sequence that length is Y, works as frame
Including symbol be OFDM symbol when, the value of Y be no more than OFDM symbol available subcarrier or all subcarriers 1/
(2^n), n are the integer more than or equal to 0.
22. according to the sending device of synchronizing signal described in claim 21, which is characterized in that
The X frame includes N number of symbol；N is positive integer；
The synchronizing signal S1 occupies M1 symbol in N number of symbol of X frame；The N>M1≥1.
23. according to the sending device of synchronizing signal described in claim 22, which is characterized in that the setup module is additionally operable to set
Set the initial position that the M1 symbol that the synchronizing signal S1 is occupied is located at X frame.
24. according to the sending device of synchronizing signal described in claim 23, which is characterized in that the setup module is additionally operable to set
The symbolic number for setting the primary synchronization signal occupancy of synchronizing signal S1 is greater than or equal to the symbolic number that the secondary synchronization signal occupies.
25. according to the sending device of synchronizing signal described in claim 24, which is characterized in that the setup module is additionally operable to
When the symbolic number that the primary synchronization signal occupies is two or more, different arrangements or warp are passed through using identical sequence
It crosses different signal processing modes and generates the primary synchronization signal sent on described two or more than two symbols.
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