CN103313377A - Method and device for transmitting synchronizing signals - Google Patents
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Abstract
The invention discloses a method for transmitting synchronizing signals. The method comprises the steps that a first communication node transmits a synchronizing signal S1 on an X frame and transmits a synchronizing signal S2 on an (X+K) frame, wherein the synchronizing signal S1 and the synchronizing signal S2 are different, and K is not less than 1; or, the first communication node transmits the synchronizing signal S1 on the X frame, and S is in a main and auxiliary synchronizing signal structure. The invention also discloses a device for transmitting the synchronizing signals. According to the device for transmitting the synchronizing signals and the method for transmitting the synchronizing signals, a problem of high terminal realizing cost caused by a synchronizing channel standard in the existing wireless communication can be solved.
Description
Technical field
The present invention relates to the communications field, refer to especially a kind of sending method and device of synchronizing signal.
Background technology
Along with the development of mobile Internet and popularizing of smart mobile phone, the Mobile data traffic demand rapidly increases, and the data service of rapid growth has proposed severe challenge to the transmittability of mobile communications network.According to authoritative institution's prediction, in Future Ten year (2011-2020), the mobile data services amount is also doubled every year, will increase by 1,000 times in 10 years.
Most mobile data services mainly occur in indoor and the focus environment, are presented as nomadic/local wireless access scene.According to statistics, at present nearly 70% of the mobile data services amount occur in indoorly, and this ratio also will continue to increase, and expecting 2012 will be above 80%.Data service is mainly Internet service, and is more single to the requirement of service quality, and far below the requirement of conventional telecommunications business to service quality.
Cell mobile communication systems mainly towards be high-speed mobile, the conventional telecommunications service design of seamless switching, when it carried large flow low speed IP (Internet protocol) data packet traffic, efficient was on the low side, high cost.To adopt OFDM (Orthogonal Frequency Division Multiplexing, OFDM) LTE of technology (Long Term Evolution, Long Term Evolution) standard is example, it is at frame structure, resource is distributed, control channel, pilot tone, the aspects such as the network architecture all are for satisfying high-speed mobile, the conventional telecommunications Demand Design of seamless switching, cause system control overhead near 30%, and implementation complexity and the cost of product have been increased, for example, because the problem of LTE synchronizing channel self design, the non-constant of ability to the frequency deviation tolerance, the frequency error that requires crystal oscillator to produce just is no more than, a negative subcarrier spacing (15kHz), this causes the LTE terminal must adopt expensive high-precision crystal oscillator.
Based on above-mentioned analysis, the cellular mobile communication field need to have oneself low cost, be fit to the solution of nomadic or local wireless data access.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of sending method and device of synchronizing signal, realizes the high problem of cost to solve the terminal that the synchronizing channel standard causes in the existing wireless communications.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of sending method of synchronizing signal, the method comprises:
The first communication node sends synchronizing signal S1 at the X frame, sends synchronizing signal S2 at (X+K) frame, and described synchronizing signal S1 is different with S2, described K 〉=1.
The method also comprises:
After the second communication node received synchronizing signal S1 from described X frame, S1 obtained synchronizing information by synchronizing signal; Described synchronizing information comprises: timing estimation and/or frequency deviation are estimated;
The second communication node is estimated to receive synchronizing signal S2 from described (X+K) frame according to described timing estimation and/or frequency deviation.
Described X frame and (X+K) frame comprise respectively N symbol; N is positive integer;
Described synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Described synchronizing signal S2 takies M2 symbol in N the symbol of (X+K) frame;
Described M1 equates with M2 or is unequal; Described N＞M1 〉=1, N＞M2 〉=1.
The M1 that described synchronizing signal S1 a takies symbol is positioned at the original position of X frame; The M2 that described synchronizing signal S2 a takies symbol is positioned at the original position of (X+K) frame.
Synchronizing signal S1 is generated through different arrangements or by the unlike signal processing mode by identical sequence with synchronizing signal S2.
When described synchronizing signal S1 and synchronizing signal S2 were main and auxiliary synchronizing signal structure, the master sync signal of described synchronizing signal S1 and S2 was generated through different arrangements or unlike signal processing mode by identical sequence; Perhaps,
When described synchronizing signal S2 was main and auxiliary synchronizing signal structure, the master sync signal of described synchronizing signal S2 was generated through different arrangements or unlike signal processing mode by identical sequence with synchronizing signal S1.
Described identical sequence is that length is constant envelope zero autocorrelation sequence of Y.
When the symbol that described frame comprises was the OFDM symbol, the value of described Y was no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and described n is the integer more than or equal to 0.
From the zero autocorrelation sequence set of described constant envelope, select to be used for generating in the combined sequence of synchronizing signal, having the sequence identifier sum of two constant envelope, zero autocorrelation sequence at least is Y, and described sequence identifier is for generating the several Zs relatively prime with Y that adopt when described length is constant envelope zero autocorrelation sequence of Y.
Described different arrangement comprises: a kind ofly be arranged as described sequence and repeat formation P time in time domain; Another kind is arranged as described sequence mode by the conjugation symmetry on time domain and repeats formation P time, and described P is the integer greater than 1.
When described synchronizing signal S1 and synchronizing signal S2 were main and auxiliary synchronizing signal structure, described synchronizing signal S1 was identical with the auxiliary synchronous signals of synchronizing signal S2, was the Golay sequence generation of G by length; Perhaps,
When described synchronizing signal S2 was main and auxiliary synchronizing signal structure, the auxiliary synchronous signals of described synchronizing signal S2 was the Golay sequence generation of G by length.
When the symbol that described frame comprises was the OFDM symbol, the value of described G was no more than the available subcarrier of a described OFDM symbol or 1/ (2^n) of all subcarriers, and described n is the integer more than or equal to 0.
The sequence number that the sequence number that the Golay arrangement set comprises comprises more than or equal to constant envelope zero autocorrelation sequence set.
The present invention also provides a kind of dispensing device of synchronizing signal, comprising: module and sending module are set, wherein:
The described module that arranges is used for synchronizing signal S1 and S2 are set, and makes both different;
Described sending module is used for sending described synchronizing signal S1 at the X frame, sends described synchronizing signal S2 at (X+K) frame, described K 〉=1.
This device also comprises:
Receiver module is used for behind described X frame reception synchronizing signal S1, and S1 obtains synchronizing information by synchronizing signal; Described synchronizing information comprises: timing estimation and/or frequency deviation are estimated; Estimate to receive synchronizing signal S2 from described (X+K) frame according to described timing estimation and/or frequency deviation again.
Described X frame and (X+K) frame comprise respectively N symbol; N is positive integer;
Described synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Described synchronizing signal S2 takies M2 symbol in N the symbol of (X+K) frame;
Described M1 equates with M2 or is unequal; Described N＞M1 〉=1, N＞M2 〉=1.
The described module that arranges also is used for arranging the original position that M1 symbol that described synchronizing signal S1 takies is positioned at the X frame; The original position that M2 symbol that described synchronizing signal S2 takies is positioned at (X+K) frame is set.
The described module that arranges also is used for adopting identical sequence to generate described synchronizing signal S1 and synchronizing signal S2 through different arrangement or unlike signal processing modes.
When described synchronizing signal S1 and synchronizing signal S2 were main and auxiliary synchronizing signal structure, the described module that arranges also was used for the master sync signal that adopts the different arrangement of identical sequence process or unlike signal processing mode to generate described synchronizing signal S1 and S2;
When described synchronizing signal S2 was main and auxiliary synchronizing signal structure, the described module that arranges also was used for the master sync signal and the synchronizing signal S1 that adopt the different arrangement of identical sequence process or unlike signal processing mode to generate described synchronizing signal S2.
The described module that arranges, also be used for adopting length is that constant envelope zero autocorrelation sequence of Y is as described identical sequence.
When the symbol that described frame comprises was the OFDM symbol, the value of described Y was no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and described n is the integer more than or equal to 0; Perhaps,
From the zero autocorrelation sequence set of described constant envelope, select to be used for generating in the combined sequence of synchronizing signal, having the sequence identifier sum of two constant envelope, zero autocorrelation sequence at least is Y, and described sequence identifier is for generating the several Zs relatively prime with Y that adopt when described length is constant envelope zero autocorrelation sequence of Y.
Described different arrangement comprises: a kind ofly be arranged as described sequence and repeat formation P time in time domain; Another kind is arranged as described sequence mode by the conjugation symmetry on time domain and repeats formation P time, and described P is the integer greater than 1.
The described module that arranges also is used for when described synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, and adopting length is the auxiliary synchronous signals that the Golay sequence of G generates synchronizing signal S1 and synchronizing signal S2; Synchronizing signal S1 is identical with the auxiliary synchronous signals of synchronizing signal S2; Perhaps, when also being main and auxiliary synchronizing signal structure for described synchronizing signal S2, adopting length is the auxiliary synchronous signals of the Golay sequence generation synchronizing signal S2 of G;
When the symbol that described frame comprises was the OFDM symbol, the value of described G was no more than the available subcarrier of a described OFDM symbol or 1/ (2^n) of all subcarriers, and described n is the integer more than or equal to 0.
The described module that arranges, the sequence number that the sequence number that the Golay arrangement set that also is used for adopting comprises comprises more than or equal to constant envelope zero autocorrelation sequence set.
The present invention also provides a kind of sending method of synchronizing signal, comprising:
The first communication node sends synchronizing signal S1 at the X frame, and described synchronizing signal S1 is main and auxiliary synchronizing signal structure.
The method also comprises:
The second communication node obtains synchronizing information by described master sync signal after receiving the master sync signal of described synchronizing signal S1 from described X frame; Described synchronizing information comprises: timing estimation and/or frequency deviation are estimated;
The second communication node is estimated to receive the auxiliary synchronous signals of described synchronizing signal S1 or follow-up master sync signal and auxiliary synchronous signals from described X frame according to timing estimation and/or frequency deviation.
Described X frame comprises N symbol; N is positive integer;
Described synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Described N＞M1 〉=1.
The symbolic number that the symbolic number that the master sync signal of described synchronizing signal S1 takies takies more than or equal to described auxiliary synchronous signals.
The symbolic number that described master sync signal takies is two or more, and the master sync signal that sends at described two or more symbols is generated through different arrangements or through different signal processing modes by identical sequence.
The present invention also provides a kind of dispensing device of synchronizing signal, and this device comprises: module and sending module are set, wherein:
The described module that arranges is used for synchronizing signal S1 is set, and makes described synchronizing signal S1 have main and auxiliary synchronizing signal structure;
Described sending module is used for sending described synchronizing signal S1 at the X frame.
This device also comprises receiver module, after receiving the master sync signal of synchronizing signal S1 from described X frame, obtains synchronizing information by described master sync signal; Described synchronizing information comprises: timing estimation and/or frequency deviation are estimated; Estimate to receive follow-up auxiliary synchronous signals or follow-up master sync signal and auxiliary synchronous signals from described X frame according to described timing estimation and/or frequency deviation again.
Described X frame comprises N symbol; N is positive integer;
Described synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Described N＞M1 〉=1.
The described module that arranges also is used for arranging the original position that M1 symbol that described synchronizing signal S1 takies is positioned at the X frame.
The described module that arranges, the symbolic number that the symbolic number that also takies for the master sync signal that synchronizing signal S1 is set takies more than or equal to described auxiliary synchronous signals.
The described module that arranges, when the symbolic number that also is used for taking at described master sync signal is two or more, adopt identical sequence to generate the master sync signal that sends on described two or more symbols through different arrangements or through different signal processing modes.
The sending method of synchronizing signal provided by the invention, by to the synchronizing signal structure and send the setting of sequence, for example the first communication node sends synchronizing signal S1 at the X frame, send synchronizing signal S2 at (X+K) frame, synchronizing signal S1 is different with S2; Synchronizing signal S1 and synchronizing signal S2 by identical sequence through different arrangements or by means such as unlike signal processing mode generations, optimized existing synchronization channel design, reduced the required precision to crystal oscillator, thereby can effectively reduce power consumption and the implementation complexity of terminal, satisfy better the data user of high speed development and the needs of wireless communication industry future development.
Description of drawings
Fig. 1 is the transmission flow schematic diagram of a kind 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 the another kind of synchronizing signal of the present invention;
Fig. 6 is the frame structure schematic diagram four that the present invention sends synchronizing signal.
Embodiment
Sending method such as Fig. 1 of a kind of synchronizing signal provided by the invention comprise:
Wherein, X frame and (X+K) frame comprise respectively N symbol; N is positive integer; Synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Synchronizing signal S2 takies M2 symbol in N the symbol of (X+K) frame; M1 equates with M2 or is unequal; N＞M1 〉=1, N＞M2 〉=1.
The M1 that synchronizing signal S1 a takies symbol is positioned at the original position of X frame; The M2 that synchronizing signal S2 a takies symbol is positioned at the original position of (X+K) frame.
Synchronizing signal S1 is generated through different arrangements or by the unlike signal processing mode by identical sequence with synchronizing signal S2.
When synchronizing signal S1 and synchronizing signal S2 were main and auxiliary synchronizing signal structure, the master sync signal of synchronizing signal S1 and S2 was generated through different arrangements or unlike signal processing mode by identical sequence; Perhaps,
When synchronizing signal S2 was main and auxiliary synchronizing signal structure, the master sync signal of synchronizing signal S2 was generated through different arrangements or unlike signal processing mode by identical sequence with synchronizing signal S1.
Above-mentioned identical sequence is that length is constant envelope zero autocorrelation sequence of Y.
Further, when the symbol that comprises when frame was the OFDM symbol, the value of Y was no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0; Perhaps,
From constant envelope zero autocorrelation sequence set, select to be used for generating in the combined sequence of synchronizing signal, having the sequence identifier sum of two constant envelope, zero autocorrelation sequence at least is Y, and sequence identifier is made a living into the several Zs relatively prime with Y that adopt when length is constant envelope zero autocorrelation sequence of Y.
Further, above-mentioned different arrangement comprises: a kind of sequence that is arranged as repeats formation P time in time domain; Another kind is arranged as sequence mode by the conjugation symmetry on time domain and repeats formation P time, and P is the integer greater than 1.
When synchronizing signal S1 and synchronizing signal S2 were main and auxiliary synchronizing signal structure, synchronizing signal S1 was identical with the auxiliary synchronous signals of synchronizing signal S2, was the Golay sequence generation of G by length; Perhaps,
When synchronizing signal S2 was main and auxiliary synchronizing signal structure, the auxiliary synchronous signals of synchronizing signal S2 was the Golay sequence generation of G by length.
Further, when the symbol that frame comprises was the OFDM symbol, the value of G was no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the sequence number that the Golay arrangement set comprises comprises more than or equal to constant envelope zero autocorrelation sequence set.
Send synchronizing signal S1 below in conjunction with embodiment one to nine explanation the first communication node at the X frame, send the implementation process of synchronizing signal S2 at (X+K) frame.
Embodiment one
In the communication system, X frame, (X+K) frame comprise respectively N symbol, K 〉=1, and preferably, symbol is the OFDM symbol.
The first communication node uses respectively N M1, the M2 in the symbol symbol to send synchronizing signal S1, S2 in X frame, (X+K) frame, wherein, synchronizing signal S1 is different with synchronizing signal S2, preferably, for example shown in Figure 2, M1=M2 equals 1, and synchronizing signal is positioned on the symbol 1 that the frame head of corresponding frame: synchronizing signal S1 is positioned at the X frame, synchronizing signal S2 is positioned on the symbol 1 of (X+K) frame.
Synchronizing signal S1 can be generated through different arrangements by identical sequence (sequence) with synchronizing signal S2.
Preferably, this sequence is that length is constant envelope zero autocorrelation sequence of Y, also can be other binary sequences, wherein, the value of Y is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0, for example n=2.Further, from constant envelope zero autocorrelation sequence set, select to be used for generating in the combined sequence of synchronizing signal, having the sequence identifier sum of two constant envelope, zero autocorrelation sequence at least is Y, wherein, sequence identifier is made a living into the several Zs relatively prime with Y that adopt when length is constant envelope zero autocorrelation sequence of Y.
About different arrangement modes, take sequence=[1+i 1-i 2+i 2-i] as 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, be equivalent to sequence and repeat to have sent once in time domain, also can be repeatedly; Or [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.Any one pattern of rows and columns can be as synchronizing signal S1 or S2, but will guarantee that the master sync signal of synchronizing signal S1 and S2 is different.
The second communication node receives synchronizing signal S1 and synchronizing signal S2 at X frame and (X+K frame) respectively, obtains synchronizing information, and preferably, after the second communication node received synchronizing signal S1 from the X frame, S1 obtained synchronizing information by synchronizing signal; Synchronizing information comprises: timing estimation and/or frequency deviation are estimated; The second communication node is estimated to receive synchronizing signal S2 from (X+K) frame according to timing estimation and/or frequency deviation.
Embodiment two
In the communication system, X frame, (X+K) frame comprise respectively N symbol, K 〉=1, and preferably, symbol is the OFDM symbol.
The first communication node uses respectively N M1, the M2 in the symbol symbol to send synchronizing signal S1, S2 in X frame, (X+K) frame, wherein, synchronizing signal S1 is different with synchronizing signal S2, preferably, for example shown in Figure 2, M1=M2 equals 1, and synchronizing signal is positioned on the symbol 1 that the frame head of corresponding frame: synchronizing signal S1 is positioned at the X frame, synchronizing signal S2 is positioned on the symbol 1 of (X+K) frame.
Synchronizing signal S1 can be generated through different arrangements by identical sequence (sequence) with synchronizing signal S2.Wherein, the sequence that chooses repeats no more with identical described in the embodiment one herein.
About different arrangement modes, take sequence=[1+i 1-i 2+i 2-i] as 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, also can be [the conjugate symmetric sequence sequence conjugate symmetric sequence of the conjugate symmetric sequence sequence of sequence sequence] pattern, the conjugate symmetric sequence that is equivalent to sequence repeats to have sent repeatedly in time domain.Any one pattern of rows and columns can be as synchronizing signal S1 or S2, but will guarantee that the master sync signal of synchronizing signal S1 and S2 is different.
The second communication node is identical with embodiment one with the process that (X+K frame) receives synchronizing signal S1 and synchronizing signal S2 at the X frame respectively, repeats no more herein.
Embodiment three
In the communication system, X frame, (X+K) frame comprise respectively N symbol, K 〉=1, and preferably, symbol is the OFDM symbol.
The first communication node uses respectively N M1, the M2 in the symbol symbol to send synchronizing signal S1, S2 in X frame, (X+K) frame, wherein, synchronizing signal S1 is different with synchronizing signal S2, preferably, for example shown in Figure 2, M1=M2 equals 1, and synchronizing signal is positioned on the symbol 1 that the frame head of corresponding frame: synchronizing signal S1 is positioned at the X frame, synchronizing signal S2 is positioned on the symbol 1 of (X+K) frame.
Synchronizing signal S1 can be generated through different signal processing modes by identical sequence (Sequence) with synchronizing signal S2.Wherein, the sequence that chooses repeats no more with identical described in the embodiment one herein.
About different signal processing modes, namely how to generate the mode of time domain sequences, can obtain by multiple means, for example, transforming to time domain from frequency domain is a kind of mode, perhaps directly processing in time domain also is a kind of mode.
The below describes as an example of the signal processing mode that transforms to time domain from frequency domain example.
Take sequence=[1+i 1-i 2+i 2-i] as example, sequence=[1+i 1-i 2+i 2-i] be mapped on all or part of available subcarrier of an OFDM symbol, and carry out the IFFT conversion, the time-domain signal that obtains, for example shine upon every a subcarrier, by will in the OFDM symbol, forming two cycles of same waveform as after the IFFT conversion, preferably, can carry out the conjugation symmetry operation in these two periodic signals, namely one of two periodic signals can be used as synchronizing signal S1, and another carries out can be used as synchronizing signal S2 after the conjugation symmetry operation.
The second communication node is identical with embodiment one with the process that (X+K frame) receives synchronizing signal S1 and synchronizing signal S2 at the X frame respectively, repeats no more herein.
Embodiment four
In the communication system, X frame, (X+K) frame comprise respectively N symbol, K 〉=1, and preferably, symbol is the OFDM symbol.
The first communication node uses respectively N M1, the M2 in the symbol symbol to send synchronizing signal S1, S2 in X frame, (X+K) frame, wherein, synchronizing signal S1 is different with synchronizing signal S2, preferably, for example shown in Figure 3, M1=M2 equals 2, and synchronizing signal is positioned on the symbol 1 and symbol 2 that the frame head of corresponding frame: synchronizing signal S1 is positioned at the X frame, synchronizing signal S2 is positioned on the symbol 1 and symbol 2 of (X+K) frame.
Further, synchronizing signal S1 and S2 all adopt main and auxiliary synchronizing signal structure, and wherein, the master sync signal of synchronizing signal S1 and S2 is different; Synchronizing signal S1 is identical with the auxiliary synchronous signals of synchronizing signal S2.
Wherein, the master sync signal of synchronizing signal S1 and S2 is to be generated through different arrangements by identical sequence (Sequence).Wherein, the sequence that chooses repeats no more with identical described in the embodiment one herein.
About different arrangement modes, take sequence=[1+i 1-i 2+i 2-i] as 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, being equivalent to sequence repeats to have sent once in time domain, also can be repeatedly, or [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 can be as the master sync signal of synchronizing signal S1 or S2, but will guarantee that the master sync signal of synchronizing signal S1 and S2 is different.
Preferably, the auxiliary synchronous signals of synchronizing signal S1 and S2 is to be that the Golay sequence of G generates by length, and the value of G is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the constant envelope zero autocorrelation sequence set of using the sequence number that comprises in the Golay arrangement set to use when generating master sync signal when generating auxiliary synchronous signals comprises, for example, the Golay sequence that can be used for auxiliary synchronous signals has 264, and the Sequence sequence that can be used for master sync signal has 3 or 4.When from above-mentioned two kinds of arrangement sets, choosing sequence, can select to have low peak average ratio, the sequence of good auto-correlation or their cross correlation etc.
The second communication node is identical with embodiment one with the process that (X+K frame) receives synchronizing signal S1 and synchronizing signal S2 at the X frame respectively, repeats no more herein.
Embodiment five
In the communication system, X frame, (X+K) frame comprise respectively N symbol, and preferably, symbol is the OFDM symbol.
The first communication node uses respectively N M1, the M2 in the symbol symbol to send synchronizing signal S1, S2 in X frame, (X+K) frame, wherein, synchronizing signal S1 is different with synchronizing signal S2, preferably, for example shown in Figure 3, M1=M2 equals 2, and synchronizing signal is positioned on the symbol 1 and symbol 2 that the frame head of corresponding frame: synchronizing signal S1 is positioned at the X frame, synchronizing signal S2 is positioned on the symbol 1 and symbol 2 of (X+K) frame.
Further, synchronizing signal S1 and S2 all adopt main and auxiliary synchronizing signal structure, and wherein, the master sync signal of synchronizing signal S1 and S2 is different; Synchronizing signal S1 is identical with the auxiliary synchronous signals of synchronizing signal S2.
Wherein, the master sync signal of synchronizing signal S1 and S2 is to be generated through different arrangements by identical sequence (Sequence).Wherein, the sequence that chooses repeats no more with identical described in the embodiment one herein.
About different arrangement modes, take sequence=[1+i 1-i 2+i 2-i] as 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, also can be [conjugation of the conjugate symmetric sequence sequence of the conjugate symmetric sequence sequence of sequence sequence piles sequence] pattern, the conjugate symmetric sequence that is equivalent to sequence repeats to send repeatedly in time domain.Wherein, any one pattern of rows and columns can be as the master sync signal of synchronizing signal S1 or S2, but will guarantee that the master sync signal of synchronizing signal S1 and S2 is different.
Preferably, the auxiliary synchronous signals of synchronizing signal S1 and S2 is to be that the Golay sequence of G generates by length, and the value of G is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the constant envelope zero autocorrelation sequence set of using the sequence number that comprises in the Golay arrangement set to use when generating master sync signal when generating auxiliary synchronous signals comprises, for example, the Golay sequence that can be used for auxiliary synchronous signals has 264, and the Sequence sequence that can be used for master sync signal has 3 or 4.When from above-mentioned two kinds of arrangement sets, choosing sequence, can select to have low peak average ratio, the sequence of good auto-correlation or their cross correlation etc.
The second communication node is identical with embodiment one with the process that (X+K frame) receives synchronizing signal S1 and synchronizing signal S2 at the X frame respectively, repeats no more herein.
Embodiment six
In the communication system, X frame, (X+K) frame comprise respectively N symbol, and preferably, symbol is the OFDM symbol.
The first communication node uses respectively N M1, the M2 in the symbol symbol to send synchronizing signal S1, S2 in X frame, (X+K) frame, wherein, synchronizing signal S1 is different with synchronizing signal S2, preferably, for example shown in Figure 3, M1=M2 equals 2, and synchronizing signal is positioned on the symbol 1 and symbol 2 that the frame head of corresponding frame: synchronizing signal S1 is positioned at the X frame, synchronizing signal S2 is positioned on the symbol 1 and symbol 2 of (X+K) frame.
Further, synchronizing signal S1 and S2 all adopt main and auxiliary synchronizing signal structure, and wherein, the master sync signal of synchronizing signal S1 and S2 is different; Synchronizing signal S1 is identical with the auxiliary synchronous signals of synchronizing signal S2.
Wherein, the master sync signal of synchronizing signal S1 and S2 is to be generated through different signal processing modes by identical sequence (Sequence).Wherein, the sequence that chooses repeats no more with identical described in the embodiment one herein.
About different signal processing modes, take sequence=[1+i 1-i 2+i 2-i] as example, signal processing mode can be: sequence=[1+i 1-i 2+i 2-i] be mapped on all or part of available subcarrier of an OFDM symbol and carry out the IFFT conversion, obtain time-domain signal, for example shine upon every a subcarrier, by will in the OFDM symbol, forming two cycles of same waveform as after the IFFT conversion, preferably, can carry out the conjugation symmetry operation in these two periodic signals.
Preferably, the auxiliary synchronous signals of synchronizing signal S1 and S2 is to be that the Golay sequence of G generates by length, and the value of G is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the constant envelope zero autocorrelation sequence set of using the sequence number that comprises in the Golay arrangement set to use when generating master sync signal when generating auxiliary synchronous signals comprises, for example, the Golay sequence that can be used for auxiliary synchronous signals has 264, and the Sequence sequence that can be used for master sync signal has 3 or 4.When from above-mentioned two kinds of arrangement sets, choosing sequence, can select to have low peak average ratio, the sequence of good auto-correlation or their cross correlation etc.
The second communication node is identical with embodiment one with the process that (X+K frame) receives synchronizing signal S1 and synchronizing signal S2 at the X frame respectively, repeats no more herein.
Embodiment seven
In the communication system, X frame, (X+K) frame comprise respectively N symbol, and preferably, symbol is the OFDM symbol.
The first communication node uses respectively N M1, the M2 in the symbol symbol to send synchronizing signal S1, S2 in X frame, (X+K) frame, wherein, synchronizing signal S1 is different with synchronizing signal S2, preferably, for example shown in Figure 4, M1 equals 1, M2 and equals 2, (also can be M1 equal 2, M2 equal 1) synchronizing signal is positioned on the symbol 1 that the frame head of corresponding frame: synchronizing signal S1 is positioned at the X frame, synchronizing signal S2 is positioned on the symbol 1 and symbol 2 of (X+K) frame.
Wherein, synchronizing signal S2 adopts main and auxiliary synchronizing signal structure, and unlike signal S1 is not main and auxiliary synchronizing signal structure, and then the master sync signal of synchronizing signal S2 is to be generated through different arrangements by identical sequence (Sequence) from synchronizing signal S1.Wherein, the sequence that chooses repeats no more with identical described in the embodiment one herein.
About different arrangement modes, take sequence=[1+i 1-i 2+i 2-i] as 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, being equivalent to sequence repeats to have sent once in time domain, also can be repeatedly, or [1+i 1-i 2+i 2-i 2+i 2-i 1+i1-i], i.e. [conjugate symmetric sequence of sequence sequence] pattern.Wherein, any one pattern of rows and columns can be as master sync signal and the synchronizing signal S1 of synchronizing signal S2, but will guarantee that the master sync signal of synchronizing signal S2 is different from synchronizing signal S1.
Preferably, the auxiliary synchronous signals of synchronizing signal S2 is to be that the Golay sequence of G generates by length, and the value of G is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the constant envelope zero autocorrelation sequence set of using the sequence number that comprises in the Golay arrangement set to use when generating master sync signal when generating auxiliary synchronous signals comprises, for example, the Golay sequence that can be used for auxiliary synchronous signals has 264, and the Sequence sequence that can be used for master sync signal has 3 or 4.When from above-mentioned two kinds of arrangement sets, choosing sequence, can select to have low peak average ratio, the sequence of good auto-correlation or their cross correlation etc.
The second communication node is identical with embodiment one with the process that (X+K frame) receives synchronizing signal S1 and synchronizing signal S2 at the X frame respectively, repeats no more herein.
Embodiment eight
In the communication system, X frame, (X+K) frame comprise respectively N symbol, and preferably, symbol is the OFDM symbol.
The first communication node uses respectively N M1, the M2 in the symbol symbol to send synchronizing signal S1, S2 in X frame, (X+K) frame, wherein, synchronizing signal S1 is different with synchronizing signal S2, preferably, for example shown in Figure 4, M1 equals 1, M2 and equals 2, (also can be M1 equal 2, M2 equal 1) synchronizing signal is positioned on the symbol 1 that the frame head of corresponding frame: synchronizing signal S1 is positioned at the X frame, synchronizing signal S2 is positioned on the symbol 1 and symbol 2 of (X+K) frame.
Wherein, synchronizing signal S2 adopts main and auxiliary synchronizing signal structure, and synchronizing signal S1 is not main and auxiliary synchronizing signal structure, and then the master sync signal of synchronizing signal S2 is to be generated through different arrangements by identical sequence (Sequence) from synchronizing signal S1.Wherein, the sequence that chooses repeats no more with identical described in the embodiment one herein.
About different arrangement modes, take sequence=[1+i 1-i 2+i 2-i] as 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, also can be [conjugation of the conjugate symmetric sequence sequence of the conjugate symmetric sequence sequence of sequence sequence piles sequence] pattern, the conjugate symmetric sequence that is equivalent to sequence repeats to send repeatedly in time domain.Wherein, any one pattern of rows and columns can be as master sync signal and the synchronizing signal S1 of synchronizing signal S2, but will guarantee that the master sync signal of synchronizing signal S2 is different from synchronizing signal S1.
Preferably, the auxiliary synchronous signals of synchronizing signal S2 is to be that the Golay sequence of G generates by length, and the value of G is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the constant envelope zero autocorrelation sequence set of using the sequence number that comprises in the Golay arrangement set to use when generating master sync signal when generating auxiliary synchronous signals comprises, for example, the Golay sequence that can be used for auxiliary synchronous signals has 264, and the Sequence sequence that can be used for master sync signal has 3 or 4.When from above-mentioned two kinds of arrangement sets, choosing sequence, can select to have low peak average ratio, the sequence of good auto-correlation or their cross correlation etc.
The second communication node is identical with embodiment one with the process that (X+K frame) receives synchronizing signal S1 and synchronizing signal S2 at the X frame respectively, repeats no more herein.
Embodiment nine
In the communication system, X frame, (X+K) frame comprise respectively N symbol, and preferably, symbol is the OFDM symbol.
The first communication node uses respectively N M1, the M2 in the symbol symbol to send synchronizing signal S1, S2 in X frame, (X+K) frame, wherein, synchronizing signal S1 is different with synchronizing signal S2, preferably, for example shown in Figure 4, M1 equals 1, M2 and equals 2, (also can be M1 equal 2, M2 equal 1) synchronizing signal is positioned on the symbol 1 that the frame head of corresponding frame: synchronizing signal S1 is positioned at the X frame, synchronizing signal S2 is positioned on the symbol 1 and symbol 2 of (X+K) frame.
Wherein, synchronizing signal S2 adopts main and auxiliary synchronizing signal structure, synchronizing signal S1 is not main and auxiliary synchronizing signal structure, and the master sync signal of synchronizing signal S2 is to be generated through different signal processing modes by identical sequence (Sequence) from synchronizing signal S1.Wherein, the sequence that chooses repeats no more with identical described in the embodiment one herein.
About different signal processing modes, take sequence=[1+i 1-i 2+i 2-i] as example, signal processing mode can be: sequence=[1+i 1-i 2+i 2-i] be mapped on all or part of available subcarrier of an OFDM symbol and carry out the IFFT conversion, obtain time-domain signal, for example shine upon every a subcarrier, by will in the OFDM symbol, forming two cycles of same waveform as after the IFFT conversion, preferably, can carry out the conjugation symmetry operation in these two periodic signals.
Preferably, the auxiliary synchronous signals of synchronizing signal S2 is to be that the Golay sequence of G generates by length, and the value of G is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the constant envelope zero autocorrelation sequence set of using the sequence number that comprises in the Golay arrangement set to use when generating master sync signal when generating auxiliary synchronous signals comprises, for example, the Golay sequence that can be used for auxiliary synchronous signals has 264, and the Sequence sequence that can be used for master sync signal has 3 or 4.When from above-mentioned two kinds of arrangement sets, choosing sequence, can select to have low peak average ratio, the sequence of good auto-correlation or their cross correlation etc.
The second communication node is identical with embodiment one with the process that (X+K frame) receives synchronizing signal S1 and synchronizing signal S2 at the X frame respectively, repeats no more herein.
In order to realize above-mentioned sending method, the invention provides a kind of dispensing device of synchronizing signal, comprising: module and sending module are set, wherein:
Module is set, is used for synchronizing signal S1 and S2 are set, make both different;
Sending module is used for sending synchronizing signal S1 at the X frame, sends synchronizing signal S2, K 〉=1 at (X+K) frame.
This device also comprises:
Receiver module is used for behind X frame reception synchronizing signal S1, and S1 obtains synchronizing information by synchronizing signal; Synchronizing information comprises: timing estimation and/or frequency deviation are estimated; Estimate to receive synchronizing signal S2 from (X+K) frame according to timing estimation and/or frequency deviation again.
X frame and (X+K) frame comprise respectively N symbol;
Synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Synchronizing signal S2 takies M2 symbol in N the symbol of (X+K) frame;
M1 equates with M2 or is unequal; N＞M1 〉=1, N＞M2 〉=1.
Module is set, also is used for arranging the original position that M1 symbol that synchronizing signal S1 takies is positioned at the X frame; The original position that M2 symbol that synchronizing signal S2 takies is positioned at (X+K) frame is set.
Module is set, also is used for adopting identical sequence to generate synchronizing signal S1 and synchronizing signal S2 through different arrangements or unlike signal processing mode.
When synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, module is set, also is used for adopting identical sequence to generate the master sync signal of synchronizing signal S1 and S2 through different arrangements or unlike signal processing mode;
When synchronizing signal S2 is main and auxiliary synchronizing signal structure, module is set, also is used for adopting identical sequence to generate master sync signal and the synchronizing signal S1 of synchronizing signal S2 through different arrangements or unlike signal processing mode.
Module is set, and also be used for adopting length is that constant envelope zero autocorrelation sequence of Y is as identical sequence.
When the symbol that frame comprises was the OFDM symbol, the value of Y was no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0; Perhaps,
From constant envelope zero autocorrelation sequence set, select to be used for generating in the combined sequence of synchronizing signal, having the sequence identifier sum of two constant envelope, zero autocorrelation sequence at least is Y, and sequence identifier is made a living into the several Zs relatively prime with Y that adopt when length is constant envelope zero autocorrelation sequence of Y.
Different arrangements comprise: a kind of sequence that is arranged as repeats formation P time in time domain; Another kind is arranged as sequence mode by the conjugation symmetry on time domain and repeats formation P time, and P is the integer greater than 1.
Module is set, also is used for when synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, adopting length is the auxiliary synchronous signals that the Golay sequence of G generates synchronizing signal S1 and synchronizing signal S2; Synchronizing signal S1 is identical with the auxiliary synchronous signals of synchronizing signal S2; Perhaps, when also being main and auxiliary synchronizing signal structure for synchronizing signal S2, adopting length is the auxiliary synchronous signals of the Golay sequence generation synchronizing signal S2 of G;
When the symbol that frame comprises was the OFDM symbol, the value of G was no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
Module is set, the sequence number that the sequence number that the Golay arrangement set that also is used for adopting comprises comprises more than or equal to constant envelope zero autocorrelation sequence set.
The present invention also provides the sending method of another kind of synchronizing signal, as shown in Figure 5, comprising:
Step 501, the first communication node sends synchronizing signal S1 at the X frame, and synchronizing signal S1 is main and auxiliary synchronizing signal structure.
Step 502, the second communication node receives synchronizing signal S1 by the X frame.Concrete, the second communication node obtains synchronizing information by this master sync signal after receiving a master sync signal from the X frame; Synchronizing information comprises: timing estimation and/or frequency deviation are estimated; The second communication node is estimated to receive follow-up auxiliary synchronous signals or follow-up master sync signal and auxiliary synchronous signals from the X frame according to timing estimation and/or frequency deviation.
Wherein, the X frame comprises N symbol; N is positive integer; Synchronizing signal S1 takies M1 symbol in N the symbol of X frame; N＞M1 〉=1.
Preferably, M1 symbol taking of synchronizing signal S1 is positioned at the original position of X frame.
Further, the symbolic number that takies more than or equal to auxiliary synchronous signals of the symbolic number that takies of the master sync signal of synchronizing signal S1.
The symbolic number that master sync signal takies is two or more, and the master sync signal that sends at two or more symbols is generated through different arrangements or through different signal processing modes by identical sequence.
Send the real-time process of synchronizing signal S1 at the X frame below in conjunction with embodiment ten to 12 explanations the first communication node.
Embodiment ten
In the communication system, the X frame comprises N symbol, and preferably, symbol is the OFDM symbol.
The first communication node uses M symbol transmission synchronizing signal S1 in N the symbol at the X frame, preferably, synchronizing signal S1 is main and auxiliary synchronizing signal structure, as shown in Figure 6, M equals 3 in the X frame, wherein, master sync signal has taken 2 symbols, auxiliary synchronous signals has taken 1 symbol, and synchronizing signal is positioned at the frame head of corresponding frame: master sync signal takies the first two symbol (symbol 1 and symbol 2), and auxiliary synchronous signals takies the 3rd symbol.
About different arrangement modes, take sequence=[1+i 1-i 2+i 2-i] as 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, being equivalent to sequence repeats to have sent once in time domain, also can be repeatedly, or [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.Wherein, any one pattern of rows and columns can be as the master sync signal 1 or 2 of synchronizing signal S1, but will guarantee that master sync signal 1 is different from master sync signal 2.
Preferably, the auxiliary synchronous signals of synchronizing signal S1 and S2 is to be that the Golay sequence of G generates by length, and the value of G is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the constant envelope zero autocorrelation sequence set that the sequence number that comprises in the Golay arrangement set that uses when generating auxiliary synchronous signals is used when generating master sync signal comprises, for example, the Golay sequence that can be used for auxiliary synchronous signals has 264, and the Sequence sequence that can be used for master sync signal has 3 or 4.When from above-mentioned two kinds of arrangement sets, choosing sequence, can select to have low peak average ratio, the sequence of good auto-correlation or their cross correlation etc.
The second communication node receives synchronizing signal S1 at the X frame respectively, obtains synchronizing information, and preferably, the second communication node obtains synchronizing information by first master sync signal after receiving first master sync signal from the X frame; Synchronizing information comprises: timing estimation and/or frequency deviation are estimated; The second communication node is estimated to receive follow-up master sync signal and auxiliary synchronous signals from the X frame according to timing estimation and/or frequency deviation.
Embodiment 11
In the communication system, the X frame comprises N symbol, and preferably, symbol is the OFDM symbol.
The first communication node uses M symbol transmission synchronizing signal S1 in N the symbol at the X frame, preferably, synchronizing signal S1 is main and auxiliary synchronizing signal structure, as shown in Figure 6, M equals 3 in the X frame, wherein, master sync signal has taken 2 symbols, auxiliary synchronous signals has taken 1 symbol, and synchronizing signal is positioned at the frame head of corresponding frame: master sync signal takies the first two symbol (symbol 1 and symbol 2), and auxiliary synchronous signals takies the 3rd symbol.
About different arrangement modes, take sequence=[1+i 1-i 2+i 2-i] as example, arrangement can be [1+i 1-i 2+i 2-i 2+i 2-i 1+i 1-i], namely [conjugate symmetric sequence of sequence sequence] pattern also can 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 can be as the master sync signal 1 or 2 of synchronizing signal S1, but will guarantee that master sync signal 1 is different from master sync signal 2.
Preferably, the auxiliary synchronous signals of synchronizing signal S1 and S2 is to be that the Golay sequence of G generates by length, and the value of G is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the constant envelope zero autocorrelation sequence set that the sequence number that comprises in the Golay arrangement set that uses when generating auxiliary synchronous signals is used when generating master sync signal comprises, for example, the Golay sequence that can be used for auxiliary synchronous signals has 264, and the Sequence sequence that can be used for master sync signal has 3 or 4.When from above-mentioned two kinds of arrangement sets, choosing sequence, can select to have low peak average ratio, the sequence of good auto-correlation or their cross correlation etc.
The second communication node is identical with embodiment ten in the process that the X frame receives synchronizing signal S1, repeats no more herein.
Embodiment 12
In the communication system, the X frame comprises N symbol, and preferably, symbol is the OFDM symbol.
The first communication node uses M symbol transmission synchronizing signal S1 in N the symbol at the X frame, preferably, synchronizing signal S1 is main and auxiliary synchronizing signal structure, as shown in Figure 6, M equals 3 in the X frame, wherein, master sync signal has taken 2 symbols, auxiliary synchronous signals has taken 1 symbol, and synchronizing signal is positioned at the frame head of corresponding frame: master sync signal takies the first two symbol (symbol 1 and symbol 2), and auxiliary synchronous signals takies the 3rd symbol.
About different signal processing modes, take sequence=[1+i 1-i 2+i 2-i] as example, signal processing mode can be sequence=[1+i 1-i 2+i 2-i] obtain by the time-domain signal that carries out IFFT conversion acquisition on all or part of available subcarrier that is mapped to an OFDM symbol, for example shine upon every a subcarrier, by will in the OFDM symbol, forming two cycles of same waveform as after the IFFT conversion, preferably, can carry out the conjugation symmetry operation in these two periodic signals.
Preferably, the auxiliary synchronous signals of synchronizing signal S1 and S2 is to be that the Golay sequence of G generates by length, and the value of G is no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and n is the integer more than or equal to 0.
The sequence number that the constant envelope zero autocorrelation sequence set that the sequence number that comprises in the Golay arrangement set that uses when generating auxiliary synchronous signals is used when generating master sync signal comprises, for example, the Golay sequence that can be used for auxiliary synchronous signals has 264, and the Sequence sequence that can be used for master sync signal has 3 or 4.When from above-mentioned two kinds of arrangement sets, choosing sequence, can select to have low peak average ratio, the sequence of good auto-correlation or their cross correlation etc.
The second communication node is identical with embodiment ten in the process that the X frame receives synchronizing signal S1, repeats no more herein.
In order to realize sending method shown in Figure 5, the invention provides a kind of dispensing device, comprise module and sending module are set, wherein:
Module is set, is used for synchronizing signal S1 is set, make synchronizing signal S1 have main and auxiliary synchronizing signal structure;
Sending module is used for sending synchronizing signal S1 at the X frame.
This device also comprises receiver module, after receiving the master sync signal of synchronizing signal S1 from the X frame, obtains synchronizing information by master sync signal; Synchronizing information comprises: timing estimation and/or frequency deviation are estimated; Estimate to receive follow-up auxiliary synchronous signals or follow-up master sync signal and auxiliary synchronous signals from the X frame according to timing estimation and/or frequency deviation again.
Wherein, the X frame comprises N symbol; N is positive integer;
Synchronizing signal S1 takies M1 symbol in N the symbol of X frame; N＞M1 〉=1.
Module is set, also is used for arranging the original position that M1 symbol that synchronizing signal S1 takies is positioned at the X frame.
Module is set, the symbolic number that the symbolic number that also takies for the master sync signal that synchronizing signal S1 is set takies more than or equal to auxiliary synchronous signals.
Module is set, when the symbolic number that also is used for taking at master sync signal is two or more, adopts identical sequence to generate the master sync signal that sends on two or more symbols through different arrangements or through different signal processing modes.
It is to be noted, in above-described embodiment one to embodiment 12, when main and auxiliary synchronizing signal was arranged, the content-dependent of auxiliary synchronous signals referred to that in master sync signal the different sequences that master sync signal sends can cause auxiliary synchronous signals to adopt different sequences corresponding with it.In addition, the original position of the more close frame of symbol that takies than auxiliary synchronous signals of the shared symbol of master sync signal.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (35)
1. the sending method of a synchronizing signal is characterized in that, the method comprises:
The first communication node sends synchronizing signal S1 at the X frame, sends synchronizing signal S2 at (X+K) frame, and described synchronizing signal S1 is different with S2, described K 〉=1.
2. the sending method of described synchronizing signal according to claim 1 is characterized in that, the method also comprises:
After the second communication node received synchronizing signal S1 from described X frame, S1 obtained synchronizing information by synchronizing signal; Described synchronizing information comprises: timing estimation and/or frequency deviation are estimated;
The second communication node is estimated to receive synchronizing signal S2 from described (X+K) frame according to described timing estimation and/or frequency deviation.
3. the sending method of described synchronizing signal according to claim 1 and 2 is characterized in that,
Described X frame and (X+K) frame comprise respectively N symbol; N is positive integer;
Described synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Described synchronizing signal S2 takies M2 symbol in N the symbol of (X+K) frame;
Described M1 equates with M2 or is unequal; Described N＞M1 〉=1, N＞M2 〉=1.
4. the sending method of described synchronizing signal according to claim 3 is characterized in that, the M1 that described synchronizing signal S1 a takies symbol is positioned at the original position of X frame; The M2 that described synchronizing signal S2 a takies symbol is positioned at the original position of (X+K) frame.
5. the sending method of described synchronizing signal according to claim 1 is characterized in that,
Synchronizing signal S1 is generated through different arrangements or by the unlike signal processing mode by identical sequence with synchronizing signal S2.
6. the sending method of described synchronizing signal according to claim 1 is characterized in that,
When described synchronizing signal S1 and synchronizing signal S2 were main and auxiliary synchronizing signal structure, the master sync signal of described synchronizing signal S1 and S2 was generated through different arrangements or unlike signal processing mode by identical sequence; Perhaps,
When described synchronizing signal S2 was main and auxiliary synchronizing signal structure, the master sync signal of described synchronizing signal S2 was generated through different arrangements or unlike signal processing mode by identical sequence with synchronizing signal S1.
7. according to claim 5 or the sending method of 6 described synchronizing signals, it is characterized in that, described identical sequence is that length is constant envelope zero autocorrelation sequence of Y.
8. the sending method of described synchronizing signal according to claim 7 is characterized in that,
When the symbol that described frame comprises was the OFDM symbol, the value of described Y was no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and described n is the integer more than or equal to 0.
9. the sending method of described synchronizing signal according to claim 7, it is characterized in that, from the zero autocorrelation sequence set of described constant envelope, select to be used for generating in the combined sequence of synchronizing signal, having the sequence identifier sum of two constant envelope, zero autocorrelation sequence at least is Y, and described sequence identifier is for generating the several Zs relatively prime with Y that adopt when described length is constant envelope zero autocorrelation sequence of Y.
10. according to claim 5 or the sending method of 6 described synchronizing signals, it is characterized in that, described different arrangement comprises: a kind ofly be arranged as described sequence and repeat formation P time in time domain; Another kind is arranged as described sequence mode by the conjugation symmetry on time domain and repeats formation P time, and described P is the integer greater than 1.
11. the sending method of described synchronizing signal is characterized in that according to claim 6,
When described synchronizing signal S1 and synchronizing signal S2 were main and auxiliary synchronizing signal structure, described synchronizing signal S1 was identical with the auxiliary synchronous signals of synchronizing signal S2, was the Golay sequence generation of G by length; Perhaps,
When described synchronizing signal S2 was main and auxiliary synchronizing signal structure, the auxiliary synchronous signals of described synchronizing signal S2 was the Golay sequence generation of G by length.
12. the sending method of described synchronizing signal according to claim 11, it is characterized in that, when the symbol that described frame comprises was the OFDM symbol, the value of described G was no more than the available subcarrier of a described OFDM symbol or 1/ (2^n) of all subcarriers, and described n is the integer more than or equal to 0.
13. according to claim 8, the sending method of 9,11 or 12 described synchronizing signals, it is characterized in that the sequence number that the sequence number that the Golay arrangement set comprises comprises more than or equal to constant envelope zero autocorrelation sequence set.
14. the dispensing device of a synchronizing signal is characterized in that, comprising: module and sending module are set, wherein:
The described module that arranges is used for synchronizing signal S1 and S2 are set, and makes both different;
Described sending module is used for sending described synchronizing signal S1 at the X frame, sends described synchronizing signal S2 at (X+K) frame, described K 〉=1.
15. the transmitting system of described synchronizing signal is characterized in that according to claim 14, this device also comprises:
Receiver module is used for behind described X frame reception synchronizing signal S1, and S1 obtains synchronizing information by synchronizing signal; Described synchronizing information comprises: timing estimation and/or frequency deviation are estimated; Estimate to receive synchronizing signal S2 from described (X+K) frame according to described timing estimation and/or frequency deviation again.
16. according to claim 14 or the transmitting system of 15 described synchronizing signals, it is characterized in that, described X frame and (X+K) frame comprise respectively N symbol; N is positive integer;
Described synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Described synchronizing signal S2 takies M2 symbol in N the symbol of (X+K) frame;
Described M1 equates with M2 or is unequal; Described N＞M1 〉=1, N＞M2 〉=1.
17. the transmitting system of described synchronizing signal is characterized in that according to claim 16, the described module that arranges also is used for arranging the original position that M1 symbol that described synchronizing signal S1 takies is positioned at the X frame; The original position that M2 symbol that described synchronizing signal S2 takies is positioned at (X+K) frame is set.
18. the transmitting system of described synchronizing signal is characterized in that according to claim 14,
The described module that arranges also is used for adopting identical sequence to generate described synchronizing signal S1 and synchronizing signal S2 through different arrangement or unlike signal processing modes.
19. the transmitting system of described synchronizing signal is characterized in that according to claim 14,
When described synchronizing signal S1 and synchronizing signal S2 were main and auxiliary synchronizing signal structure, the described module that arranges also was used for the master sync signal that adopts the different arrangement of identical sequence process or unlike signal processing mode to generate described synchronizing signal S1 and S2;
When described synchronizing signal S2 was main and auxiliary synchronizing signal structure, the described module that arranges also was used for the master sync signal and the synchronizing signal S1 that adopt the different arrangement of identical sequence process or unlike signal processing mode to generate described synchronizing signal S2.
20. according to claim 18 or the transmitting system of 19 described synchronizing signals, it is characterized in that, the described module that arranges, also being used for adopting length is that constant envelope zero autocorrelation sequence of Y is as described identical sequence.
21. the transmitting system of described synchronizing signal is characterized in that according to claim 20,
When the symbol that described frame comprises was the OFDM symbol, the value of described Y was no more than the available subcarrier of an OFDM symbol or 1/ (2^n) of all subcarriers, and described n is the integer more than or equal to 0; Perhaps,
From the zero autocorrelation sequence set of described constant envelope, select to be used for generating in the combined sequence of synchronizing signal, having the sequence identifier sum of two constant envelope, zero autocorrelation sequence at least is Y, and described sequence identifier is for generating the several Zs relatively prime with Y that adopt when described length is constant envelope zero autocorrelation sequence of Y.
22. according to claim 18 or the transmitting system of 19 described synchronizing signals, it is characterized in that, described different arrangement comprises: a kind ofly be arranged as described sequence and repeat formation P time in time domain; Another kind is arranged as described sequence mode by the conjugation symmetry on time domain and repeats formation P time, and described P is the integer greater than 1.
23. the transmitting system of described synchronizing signal is characterized in that according to claim 19,
The described module that arranges also is used for when described synchronizing signal S1 and synchronizing signal S2 are main and auxiliary synchronizing signal structure, and adopting length is the auxiliary synchronous signals that the Golay sequence of G generates synchronizing signal S1 and synchronizing signal S2; Synchronizing signal S1 is identical with the auxiliary synchronous signals of synchronizing signal S2; Perhaps, when also being main and auxiliary synchronizing signal structure for described synchronizing signal S2, adopting length is the auxiliary synchronous signals of the Golay sequence generation synchronizing signal S2 of G;
When the symbol that described frame comprises was the OFDM symbol, the value of described G was no more than the available subcarrier of a described OFDM symbol or 1/ (2^n) of all subcarriers, and described n is the integer more than or equal to 0.
24. according to claim 21 or the transmitting system of 23 described synchronizing signals, it is characterized in that the described module that arranges, the sequence number that the sequence number that the Golay arrangement set that also is used for adopting comprises comprises more than or equal to constant envelope zero autocorrelation sequence set.
25. the sending method of a synchronizing signal is characterized in that, comprising:
The first communication node sends synchronizing signal S1 at the X frame, and described synchronizing signal S1 is main and auxiliary synchronizing signal structure.
26. the sending method of described synchronizing signal is characterized in that according to claim 25, the method also comprises:
The second communication node obtains synchronizing information by described master sync signal after receiving the master sync signal of described synchronizing signal S1 from described X frame; Described synchronizing information comprises: timing estimation and/or frequency deviation are estimated;
The second communication node is estimated to receive the auxiliary synchronous signals of described synchronizing signal S1 or follow-up master sync signal and auxiliary synchronous signals from described X frame according to timing estimation and/or frequency deviation.
27. according to claim 25 or the sending method of 26 described synchronizing signals, it is characterized in that,
Described X frame comprises N symbol; N is positive integer;
Described synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Described N＞M1 〉=1.
28. the sending method of described synchronizing signal is characterized in that according to claim 25,
The symbolic number that the symbolic number that the master sync signal of described synchronizing signal S1 takies takies more than or equal to described auxiliary synchronous signals.
29. the sending method of described synchronizing signal according to claim 28, it is characterized in that, the symbolic number that described master sync signal takies is two or more, and the master sync signal that sends at described two or more symbols is generated through different arrangements or through different signal processing modes by identical sequence.
30. the dispensing device of a synchronizing signal is characterized in that, this device comprises: module and sending module are set, wherein:
The described module that arranges is used for synchronizing signal S1 is set, and makes described synchronizing signal S1 have main and auxiliary synchronizing signal structure;
Described sending module is used for sending described synchronizing signal S1 at the X frame.
31. the dispensing device of described synchronizing signal is characterized in that according to claim 30, this device also comprises receiver module, after receiving the master sync signal of synchronizing signal S1 from described X frame, obtains synchronizing information by described master sync signal; Described synchronizing information comprises: timing estimation and/or frequency deviation are estimated; Estimate to receive follow-up auxiliary synchronous signals or follow-up master sync signal and auxiliary synchronous signals from described X frame according to described timing estimation and/or frequency deviation again.
32. according to claim 30 or the dispensing device of 31 described synchronizing signals, it is characterized in that,
Described X frame comprises N symbol; N is positive integer;
Described synchronizing signal S1 takies M1 symbol in N the symbol of X frame; Described N＞M1 〉=1.
33. the dispensing device of described synchronizing signal is characterized in that according to claim 32, the described module that arranges also is used for arranging the original position that M1 symbol that described synchronizing signal S1 takies is positioned at the X frame.
34. the dispensing device of described synchronizing signal is characterized in that according to claim 33, the described module that arranges, the symbolic number that the symbolic number that also takies for the master sync signal that synchronizing signal S1 is set takies more than or equal to described auxiliary synchronous signals.
35. the dispensing device of described synchronizing signal according to claim 34, it is characterized in that, the described module that arranges, when the symbolic number that also is used for taking at described master sync signal is two or more, adopt identical sequence to generate the master sync signal that sends on described two or more symbols through different arrangements or through different signal processing modes.
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