CN105227392B - A kind of method of reception timing detection and device - Google Patents

A kind of method of reception timing detection and device Download PDF

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Publication number
CN105227392B
CN105227392B CN201410318871.8A CN201410318871A CN105227392B CN 105227392 B CN105227392 B CN 105227392B CN 201410318871 A CN201410318871 A CN 201410318871A CN 105227392 B CN105227392 B CN 105227392B
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reception
code
subband
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CN105227392A (en
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周海军
刘刚
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Datang Gaohong Zhilian Technology (Chongqing) Co.,Ltd.
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Datang Telecom Technology Industry Holding Co Ltd
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Abstract

The present invention provides a kind of method of reception timing detection and device, the short lead code of all subband signals is identical with local short lead code in one of which method, and each subband signal rest part in addition to lead code uses whole frequency domain resources uses different frequency domain resources, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence, and mutually orthogonal short lead code and long preambles code are used in another method；When periodically detecting, rough estimate, one section of long lead code of interception time of reception for determining to receive the long preambles code of each subband signal in signal related to local basic sequence progress time domain are carried out according to short lead code；According to the time of reception for receiving the long preambles code of each subband signal in signal, determine to receive the time of reception of the data symbol of each subband signal in signal.The present invention solves the problems, such as the reception timing that each subband signal how is quickly determined when distributed system uses frequency division.

Description

A kind of method of reception timing detection and device
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of method of reception timing detection and device.
Background technology
The channel architecture of usual distributed system is as shown in Figure 1.Wherein lead code is used for AGC, synchronization and offset estimation, object Reason layer control channel includes the necessary information for solving and then passing data.High-level signaling and number are transmitted after physical layer control channel According to.
As shown in Fig. 2, the lead code of non-frequency division systems is usually made of short lead code and long preambles code, it is illustrated in figure 3 IEEE802.11p frame structures, IEEE802.11p defines the short preamble sequence of multiple repetitions, i.e. before t1~t10, GI2 are long It is the cyclic prefix of data symbol that cyclic prefix, T1 and the T2 of leading code, which are long preambles code, GI,.
The receiving time of long preambles code can be substantially determined using correlation method using short lead code, obtains thick time synchronization, The correct time for receiving signal can be estimated by intercepting one section long lead code progress time domain correlation later.In order to overcome in correlation " platform " phenomenon simultaneously improves estimated accuracy, it usually needs calculates two autocorrelation value sequences.Detailed process is as follows：
For receiving signal, from initial position intercept short lead code and 1 short leader sequence symbol Ns of its own time delay into Row auto-correlation computation obtains first sequence of correlation values M1(θ), 1 short leader sequence symbol is 16 time domain sampling points, and Ns is 16。
Wherein, θ is time domain sampling point, and r is the short preamble sequence intercepted from reception signal.
2 short leader sequence symbol Ns of short lead code and its own time delay, which are intercepted, from initial position carries out auto-correlation computation, Obtain second sequence of correlation values M2(θ)。
Wherein, θ is time domain sampling point, and r is the short preamble sequence intercepted from reception signal.
Calculate M1(θ)-M2(θ) determines the time of reception of short lead code according to the peak position of obtained sequence：
It is illustrated in figure 4 being obtained after two sequence of correlation values are subtracted each other as a result, when determining that the position that peak value occurs is corresponding It carves, determines that the moment elapses forward 1 short leader sequence symbol Ns to carve T at the beginning of short lead code.It is intercepted since T+ △ One long preambles code, does that time domain is related, and relevant peaks appear in time t to local long preambles code (basic sequence)i, determine tiFor length Carved at the beginning of lead code, according to carve at the beginning of long preambles code determine to receive symbol at the time of.
As shown in figure 5, after using frequency division mechanism, it is separation on frequency domain that multiple users, which pass data, each to occupy one Frequency band, but be overlapped in the time domain.In receiving terminal, how to determine that each frequency band receives the timing of data as one respectively It must solve the problems, such as, but there is presently no corresponding Timing Synchronization detection schemes.
Invention content
The present invention provides a kind of method of reception timing detection and device, solve when distributed system uses frequency division how The problem of quickly determining the reception timing of each subband signal.
The present invention provides a kind of method of reception timing detection, including：
It is related to the first time domain of local short lead code progress that a segment signal is intercepted from reception signal, the reception signal packet Multiple subband signals are included, the short lead code of all subband signals is identical with local short lead code, and each subband signal is except leading For code using the outer rest part of whole frequency domain resources using different frequency domain resources, the long preambles code of different sub-band signal is to be based on The different set time migration of same local basic sequence；
The time of reception of the short lead code of each subband signal in reception signal is determined according to the first time domain correlated results, according to The time of reception of the short lead code of each subband signal in signal is received, determines corresponding receive in signal before the length of multiple subband signals The start time point T0 of leading code；
According to the length of T0 and local basic sequence, a segment signal and local basic sequence progress second are intercepted in signal from receiving Time domain is related；
The time of reception of the long preambles code of each subband signal in reception signal is determined according to the second time domain correlated results；
According to the time of reception for receiving the long preambles code of each subband signal in signal, determine to receive each subband in signal The time of reception of the data symbol of signal.
Preferably, when determining to receive the reception of the short lead code of each subband signal in signal according to the first time domain correlated results It carves, specifically includes：
No more than the discrete point value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjTo receive subband signal in signal The time of reception of short lead code.
Preferably, according to the time of reception for receiving the short lead code of each subband signal in signal, corresponding reception signal is determined In multiple subband signals long preambles code start time point T0, specifically include：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of and near it is rear at the time of between any moment.
Preferably, according to the length of T0 and local basic sequence, a segment signal and local basic sequence are intercepted in signal from receiving The second time domain correlation is carried out, is specifically included：
One section of reception signal not less than local basic sequence length is intercepted since T0+ △ and carries out second with local basic sequence Time domain is related, and △ is the prefix time length of long preambles code.
Preferably, when determining to receive the reception of the long preambles code of each subband signal in signal according to the second time domain correlated results It carves, specifically includes：
No more than the discrete point value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednIf time window [tn- △ 1, tn+△ 1] value of the discrete point is maximum in, it is determined that tnIt is inclined that long preambles code to receive subband signal in signal is based on local basic sequence At the time of shifting after one of setting time；
According to tnCorresponding setting time is determined, by tnThe corresponding setting time of reserve migration obtains receiving in signal one The time of reception of the long preambles code of subband signal is t relative to the time offset of T0△n；
It is t according to T0 and time offset△nObtain receiving the time of reception T0+t of subband signal long preambles code in signal△n。
Preferably, it according to the time of reception for receiving the long preambles code of each subband signal in signal, determines to receive each in signal It the time of reception of the data symbol of subband signal, specifically includes：
Determine that the reception starting point for receiving data symbol j in signal is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is data symbol For j to short lead code and the time gap of long preambles code separation, △ 2 is timing adjustment amount.
The present invention also provides a kind of method of reception timing detection, including：
The frequency domain resource and the length of short lead code occupied according to subband signal each in frequency division systems, based on setting sequence The short lead code of each subband signal mutually orthogonal in the time domain is generated by the way of orthogonal frequency division multiplex OFDM, wherein, respectively Subband signal occupies different frequency domain resources, and the length of short lead code is M/mono- of OFDM data symbol, and M is positive integer；
The frequency domain resource and the length of long preambles code occupied according to subband signal each in frequency division systems, based on setting sequence The long preambles code of each subband signal mutually orthogonal in the time domain is generated by the way of OFDM, the length of long preambles code is OFDM N/mono- of data symbol, N are positive integer；
The short lead code that a segment signal and each subband signal in frequency division systems are intercepted from reception signal carries out the first time domain Correlation, the reception signal include multiple subband signals；
The time of reception of the short lead code of each subband signal in reception signal is determined according to the first time domain correlated results, according to The time of reception of the short lead code of each subband signal in signal is received, determines corresponding receive in signal before the length of multiple subband signals The start time point T0 of leading code；
According to the length of T0 and long preambles code, a segment signal and each subband signal in frequency division systems are intercepted in signal from receiving Long preambles code to carry out the second time domain related；
The time of reception of the long preambles code of each subband signal in reception signal is determined according to the second time domain correlated results；
According to the time of reception for receiving the long preambles code of each subband signal in signal, determine to receive each subband signal in signal Data symbol the time of reception.
Preferably, the sequence that sets is zadoff-chu sequence.
Preferably, the short lead code of each subband signal is generated using equation below：
The long preambles code of each subband signal is generated using equation below：
Wherein, Si (k) represents the short lead code of subband signal i, and Li (k) represents the long preambles code of subband signal i, and i is son The number of band signal, L1 are the length of short lead code, and L2 is the length of long preambles code, and a is the frequency band number that subband signal i is occupied Minimum value, b is the maximum value for the frequency band number that subband signal i is occupied, and q is setup parameter, and m is setup parameter, and k becomes for setting Amount.
Preferably, when determining to receive the reception of the short lead code of each subband signal in signal according to the first time domain correlated results It carves, specifically includes：
No more than the discrete point value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjTo receive subband signal in signal The time of reception of short lead code.
Preferably, according to the time of reception for receiving the short lead code of each subband signal in signal, corresponding reception signal is determined In multiple subband signals long preambles code start time point T0, specifically include：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of and near it is rear at the time of between any moment.
Preferably, it according to the length of T0 and long preambles code, is intercepted in signal in a segment signal and frequency division systems respectively from receiving The long preambles code of subband signal is specifically included into the second row time domain correlation：
One section of reception signal not less than long preambles code length and each subband signal in frequency division systems are intercepted since T0+ △ Long preambles code carry out that the second time domain is related, △ is the prefix time length of long preambles code.
Preferably, the reception of the long preambles code of each subband signal in reception signal is determined according to the second time domain correlated results Moment specifically includes：
No more than the discrete point value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednTo receive subband signal in signal The time of reception of long preambles code is t relative to the time offset of T0△n；
It is t according to T0 and time offset△n, obtain the time of reception T0+ of the subband signal long preambles code in reception signal t△n。
Preferably, it according to the time of reception for receiving the long preambles code of each subband signal in signal, determines to receive each in signal It the time of reception of the data symbol of subband signal, specifically includes：
Determine that the reception starting point of data symbol j is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is data symbol j to short leading The time gap of code and long preambles code separation, △ 2 is timing adjustment amount.
The present invention also provides a kind of reception timing detection device, including：
First time domain correlation unit, when carrying out first with local short lead code for intercepting a segment signal from reception signal Domain is related, and the reception signal includes multiple subband signals, the short lead code of all subband signals and local short lead code phase Together, and each subband signal rest part in addition to lead code uses whole frequency domain resources uses different frequency domain resources, different sons The long preambles code of band signal is the different set time migration based on same local basic sequence；
First determination unit, for according to the first time domain correlated results determine receive signal in each subband signal it is short leading The time of reception of code according to the time of reception for receiving the short lead code of each subband signal in signal, determines corresponding receive in signal The start time point T0 of the long preambles code of multiple subband signals；
Second time domain correlation unit for the length according to T0 and local basic sequence, is believed from one section of interception in signal is received It is related number to carry out the second time domain to local basic sequence；
Second determination unit, for being determined to receive in signal before the length of each subband signal according to the second time domain correlated results The time of reception of leading code；
Third determination unit, for according to the time of reception for receiving the long preambles code of each subband signal in signal, determining Receive the time of reception of the data symbol of each subband signal in signal.
Preferably, the first determination unit according to the first time domain correlated results determine receive signal in each subband signal it is short before It the time of reception of leading code, specifically includes：
No more than the discrete point value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjTo receive subband signal in signal The time of reception of short lead code.
Preferably, the first determination unit is determined according to the time of reception for receiving the short lead code of each subband signal in signal The corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal, specifically includes：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of and near it is rear at the time of between any moment.
Preferably, the second time domain correlation unit intercepts one section according to the length of T0 and local basic sequence from receiving in signal Signal is related to the second time domain of local basic sequence progress, specifically includes：
One section of reception signal not less than local basic sequence length is intercepted since T0+ △ and carries out second with local basic sequence Time domain is related, and △ is the prefix time length of long preambles code.
Preferably, the second determination unit is determined to receive in signal according to the second time domain correlated results before the length of each subband signal It the time of reception of leading code, specifically includes：
No more than the discrete point value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednIf time window [tn- △ 1, tn+△ 1] value of the discrete point is maximum in, it is determined that tnIt is inclined that long preambles code to receive subband signal in signal is based on local basic sequence At the time of shifting after one of setting time；
According to tnCorresponding setting time is determined, by tnThe corresponding setting time of reserve migration obtains receiving in signal one The time of reception of the long preambles code of subband signal is t relative to the time offset of T0△n；
It is t according to T0 and time offset△nObtain receiving the time of reception T0+t of subband signal long preambles code in signal△n。
Preferably, third determination unit is determined according to the time of reception for receiving the long preambles code of each subband signal in signal The time of reception of the data symbol of each subband signal in signal is received, is specifically included：
Determine that the reception starting point for receiving data symbol j in signal is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is data symbol For j to short lead code and the time gap of long preambles code separation, △ 2 is timing adjustment amount.
The present invention also provides a kind of reception timing detection device, including processor and data transceiver, wherein：
The processor is configurable for：A segment signal and local short lead code progress first are intercepted in signal from receiving Time domain is related, and the reception signal includes multiple subband signals, the short lead code of all subband signals and local short lead code It is identical, and each subband signal rest part in addition to lead code uses whole frequency domain resources is different using different frequency domain resources The long preambles code of subband signal is the different set time migration based on same local basic sequence；According to the first time domain correlated results Determine receive signal in each subband signal short lead code the time of reception, according to receive signal in each subband signal it is short leading The time of reception of code determines the corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal；According to T0 and It is related to the second time domain of local basic sequence progress to intercept a segment signal from reception signal for the length of local basic sequence；According to Two time domain correlated results determine to receive the time of reception of the long preambles code of each subband signal in signal；It is each in signal according to receiving The time of reception of the long preambles code of a subband signal, when determining to receive the reception of the data symbol of each subband signal in signal It carves；
Data transceiver transceiving data under the control of a processor.
The present invention also provides a kind of reception timing detection device, including：
Short lead code determination unit, for the frequency domain resource that is occupied according to each subband signal in frequency division systems and short leading The length of code generates each subband letter mutually orthogonal in the time domain based on setting sequence by the way of orthogonal frequency division multiplex OFDM Number short lead code, wherein, each subband signal occupies different frequency domain resources, and the length of short lead code is OFDM data symbol M/mono-, M are positive integer；
Long preambles code determination unit, for the frequency domain resource and long preambles occupied according to subband signal each in frequency division systems The length of code generates the long preambles of each subband signal mutually orthogonal in the time domain based on setting sequence by the way of OFDM Code, the length of long preambles code are N/mono- of OFDM data symbol, and N is positive integer；
First time domain correlation unit, for intercepting a segment signal and each subband signal in frequency division systems from reception signal Short lead code carries out the first time domain correlation, and the reception signal includes multiple subband signals；
First determination unit, for according to the first time domain correlated results determine receive signal in each subband signal it is short leading The time of reception of code according to the time of reception for receiving the short lead code of each subband signal in signal, determines corresponding receive in signal The start time point T0 of the long preambles code of multiple subband signals；
For the length according to T0 and long preambles code, a segment signal is intercepted from receiving in signal for second time domain correlation unit It is related that the second time domain is carried out to the long preambles code of subband signal each in frequency division systems；
Second determination unit, for being determined to receive the long preambles of each subband signal in signal according to the second time domain correlated results The time of reception of code；
Third determination unit, for according to the time of reception for receiving the long preambles code of each subband signal in signal, determining to connect The time of reception of the data symbol of each subband signal in the collection of letters number.
Preferably, the sequence that sets is zadoff-chu sequence.
Preferably, short lead code determination unit generates the short lead code of each subband signal using equation below：
Short lead code determination unit generates the long preambles code of each subband signal using equation below：
Wherein, Si (k) represents the short lead code of subband signal i, and Li (k) represents the long preambles code of subband signal i, and i is son The number of band signal, L1 are the length of short lead code, and L2 is the length of long preambles code, and a is the frequency band number that subband signal i is occupied Minimum value, b is the maximum value for the frequency band number that subband signal i is occupied, and q is setup parameter, and m is setup parameter, and k becomes for setting Amount.
Preferably, the first determination unit according to the first time domain correlated results determine receive signal in each subband signal it is short before It the time of reception of leading code, specifically includes：
No more than the discrete point value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjTo receive subband signal in signal The time of reception of short lead code.
Preferably, the first determination unit is determined according to the time of reception for receiving the short lead code of each subband signal in signal The corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal, specifically includes：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of and near it is rear at the time of between any moment.
Preferably, the second time domain correlation unit is believed according to the length of T0 and long preambles code from one section of interception in signal is received It is related number to carry out the second time domain to the long preambles code of subband signal each in frequency division systems, specifically includes：
One section of reception signal not less than long preambles code length and each subband signal in frequency division systems are intercepted since T0+ △ Long preambles code carry out that the second time domain is related, △ is the prefix time length of long preambles code.
Preferably, the second determination unit determines to receive the length of each subband signal in signal according to the second time domain correlated results It the time of reception of lead code, specifically includes：
No more than the discrete point value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednTo receive subband signal in signal The time of reception of long preambles code is t relative to the time offset of T0△n；
It is t according to T0 and time offset△n, obtain the time of reception T0+ of the subband signal long preambles code in reception signal t△n。
Preferably, third determination unit, for according to receive signal in each subband signal long preambles code the time of reception, It determines the time of reception of the data symbol of each subband signal in reception signal, specifically includes：
Determine that the reception starting point of data symbol j is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is data symbol j to short leading The time gap of code and long preambles code separation, △ 2 is timing adjustment amount.
The present invention also provides a kind of reception timing detection device, including processor and data transceiver, wherein：
The processor is configurable for：The frequency domain resource that is occupied according to each subband signal in frequency division systems and it is short before The length of leading code generates each subband mutually orthogonal in the time domain based on setting sequence by the way of orthogonal frequency division multiplex OFDM The short lead code of signal, wherein, each subband signal occupies different frequency domain resources, and the length of short lead code is OFDM data symbol M/mono-, M is positive integer；The frequency domain resource and the length of long preambles code occupied according to subband signal each in frequency division systems, The long preambles code of each subband signal mutually orthogonal in the time domain, long preambles code are generated by the way of OFDM based on setting sequence Length be OFDM data symbol N/mono-, N is positive integer；It is intercepted in a segment signal and frequency division systems from receiving in signal The short lead code of each subband signal carries out the first time domain correlation, and the reception signal includes multiple subband signals；During according to first Domain correlated results is determined to receive the time of reception of the short lead code of each subband signal in signal, be believed according to each subband in signal is received Number short lead code the time of reception, determine the corresponding start time point for receiving the long preambles code of multiple subband signals in signal T0；According to the length of T0 and long preambles code, the length of a segment signal and each subband signal in frequency division systems is intercepted from reception signal It is related that lead code carries out the second time domain；The long preambles code of each subband signal in reception signal is determined according to the second time domain correlated results The time of reception；According to the time of reception for receiving the long preambles code of each subband signal in signal, determine to receive each subband in signal The time of reception of the data symbol of signal；
Data transceiver transceiving data under the control of a processor.
Method of reception timing detection and device provided in an embodiment of the present invention are solved when distributed system uses frequency division The problem of how quickly determining the reception timing of each subband signal, can rapidly and accurately determine in each subband signal The time of reception of data symbol.
Description of the drawings
Fig. 1 is the channel architecture schematic diagram of usual distributed system；
Fig. 2 is the preamble structure schematic diagram of usual distributed system；
Fig. 3 is the short leader sequence of multiple repetitions and long preambles code sequence diagram defined in IEEE802.11p；
Fig. 4 is two sequence of correlation values subtraction schematic diagrames；
Fig. 5 is the channel architecture schematic diagram of frequency division systems；
Fig. 6 is a kind of method of reception timing detection flow chart provided in an embodiment of the present invention；
Fig. 7 is the frequency division systems schematic diagram comprising nearby frequency bands；
Fig. 8 is to deviate to obtain different sub-band Chief Signal Boatswain lead code schematic diagram by basic sequence progress different time；
Fig. 9 be will receive signal and basic sequence carry out the second time domain it is related after result schematic diagram；
Figure 10 is another method of reception timing detection flow chart provided in an embodiment of the present invention；
Figure 11 is that frequency division systems of the embodiment of the present invention include the frequency domain resource schematic diagram that two subband signals occupy；
Figure 12 is a kind of reception timing detection device structure chart provided in an embodiment of the present invention；
Figure 13 is another reception timing detection device structure chart provided in an embodiment of the present invention.
Specific embodiment
Method of reception timing detection provided by the invention and device are carried out in more detail with reference to the accompanying drawings and examples Explanation.
In order to solve distributed system asking using the reception timing that each subband signal how is quickly determined during frequency division Topic, it is thus necessary to determine that each subband signal uses which type of short lead code and long preambles code in frequency division systems, based on used short How lead code and long preambles code are timed detection.
According to the embodiment of the present invention, a kind of method of reception timing detection is provided, as shown in fig. 6, including：
Step 601, it is related to the first time domain of local short lead code progress that a segment signal is intercepted from reception signal, it is described to connect The collection of letters number includes multiple subband signals, and the short lead code of all subband signals is identical with local short lead code, and each subband is believed Rest part uses different frequency domain resources, the long preambles of different sub-band signal number in addition to lead code uses whole frequency domain resources Code is the different set time migration based on same local basic sequence；
The method that the present embodiment is provided, each subband signal is using identical short lead code in frequency division systems, and uses Frequency domain resource is identical i.e. using whole frequency domain resources, therefore when local short lead code may be used carrying out first with receiving signal Domain is related, is determined to receive the time of reception of the short lead code of each subband signal in signal according to the first time domain correlated results.
It can be according to the length of local short lead code, from the initial position interception of signal is received not less than local short lead code One segment signal of length is related to the first time domain of local short lead code progress.
Step 602, the reception of the short lead code of each subband signal in reception signal is determined according to the first time domain correlated results Moment according to the time of reception for receiving the short lead code of each subband signal in signal, determines multiple subbands in corresponding reception signal The start time point T0 of the long preambles code of signal；
The corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal is an estimated value, if connect The short lead code of each subband signal synchronizes in the collection of letters number, then will appear a peak value in the first time domain correlated results, such as asynchronous, It will appear multiple peak values, the start time point T0 of a general long preambles code can be estimated at the time of appearance according to peak value, have The method of estimation of body can be determined flexibly, not do detailed restriction here.
Step 603, according to the length of T0 and local basic sequence, a segment signal and local basic sequence are intercepted in signal from receiving Carry out the second time domain correlation；
The signal length intercepted is not less than the length of local basic sequence.
Step 604, the long preambles code for determining to receive each subband signal in signal according to the second time domain correlated results connects Time receiving carves；
The method that the present embodiment is provided, before each subband signal is using the length of identical different sub-band signal in frequency division systems Leading code is the different time offset of same basic sequence, and time migration here can include zero, i.e., one of subband signal is straight It connects and uses basic sequence as long preambles code.
Since different subband signals is using different long preambles codes, include multiple subband signals receiving signal When, if each subband signal synchronizes, multiple peaks can occur in corresponding time migration position in the relevant sequence of the second time domain Value, if asynchronous, peak value has certain offset in corresponding time migration position, may thereby determine that and receives in signal respectively The time of reception of the long preambles code of subband signal.
Step 605, it according to the time of reception for receiving the long preambles code of each subband signal in signal, determines to receive in signal The time of reception of the data symbol of each subband signal.
It is related operation that the first time domain correlation is related to the second time domain in the embodiment of the present invention.
Preferably, the present embodiment determines to receive the short lead code of each subband signal in signal according to the first time domain correlated results The time of reception, specifically include：
No more than the discrete point value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjTo receive subband signal in signal The time of reception of short lead code.
It may also be multiple that the discrete point of non-zero, which may be one,.
If there are one the discrete points of non-zero, illustrate that multiple subband signals synchronize, that is, receive each subband signal in signal Time of reception of short lead code be t, determine the corresponding initial time for receiving the long preambles code of multiple subband signals in signal Point T0 is t.
If the discrete point of non-zero is multiple, illustrate that multiple subband signals are asynchronous, that is, receive each subband signal in signal Short lead code the time of reception to be multiple, it be in reception signal in the time of reception of the short lead code of each subband signal to determine T0 Near it is preceding at the time of；Or determining T0 be receive in signal in the time of reception of the short lead code of each subband signal near it is preceding when Carve and near it is rear at the time of between any moment.
Method of reception timing detection provided by the invention is suitable for the application of in frequency division systems, as shown in fig. 7, in frequency division systems Each frequency band can be adjacent, and each subband signal occupies the frequency domain resource on a frequency band.With N=3, i.e., have in frequency division systems For 3 subband signals, as shown in figure 8, on the basis of basic sequence, t1, offset t2, offset t3 are deviated respectively backward and is obtained pair The long preambles code answered, t1 zero.
Preferably, one section of reception signal not less than local basic sequence length and local basic sequence are intercepted since T0+ △ The second time domain correlation is carried out, △ is the prefix time length of long preambles code.
When long preambles code is long preambles code corresponding to subband signal i, related, relevant peaks of doing the second time domain to basic sequence Appear in time ti, wherein tiAfter long preambles code for subband signal i is based on the one of setting time of local basic sequence delay At the time of.
According to the time location of local basic sequence and time location and t after the difference offset setting timeiPosition, It can determine delay tiSetting time.
As shown in figure 9, the first two peak value (bold portion) is heavy with the position of local motif line skew t0 and offset t1 respectively It closing, third peak value (bold portion) is certain deviation relative to local motif line skew t2, therefore first peak value corresponds to t0, Second peak value corresponds to t1, and third peak value corresponds to t2, and t1 is elapsed forward at the time of the second peak value is corresponded to, by third peak value T2 is elapsed forward at the time of corresponding, can obtain the time offset of long preambles code in three subband signals relative to T0, wherein The time offset relative to T0 of long preambles code is 0 in two subband signals, long preambles code in other in which subband signal Time offset relative to T0 is non-zero.
Preferably, when determining to receive the reception of the long preambles code of each subband signal in signal according to the second time domain correlated results It carves, specifically includes：
Discrete point value zero setting of the modulus value no more than setting thresholding P in the sequence that second time domain correlation is obtained, if obtaining Sequence for R=R1, R2 ..., RN, R1 corresponding time point be Ts*N at 0, RN corresponding time points, Ts is adopting for signal Sample spacings, N are the number of discrete point in sequence；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednIf time window [tn- △ 1, tn+△ 1] modulus value of the discrete point is maximum in, it is determined that tnLong preambles code to receive subband signal in signal is based on local basic sequence and prolongs At the time of after slow one of setting time, wherein △ 1 is the offset of setting；
According to tnCorresponding setting time is determined, by tnCorresponding setting time is elapsed forward, obtains receiving in signal one The time of reception of the long preambles code of subband signal is t relative to the time offset of T0△n；
It is t according to T0 and time offset△nObtain receiving the time of reception T0+t of subband signal long preambles code in signal△n。
Determine that the reception starting point for receiving data symbol j in signal is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is data symbol For j to short lead code and the time gap of long preambles code separation, △ 2 is timing adjustment amount, can use symbol suffix time span 1/3。
The embodiment of the present invention may determine that according to the position for the time domain relevant peaks for receiving signal and local basic sequence can The signal of several subbands and the time offset of each subband signal are received, so that it is determined that going out the reception window of time domain number.
In the example of figure 9, it is related to the second time domain of local basic sequence progress using the long preambles code of reception, it can obtain related Sequence R.Dotted line is T0+t1, T0+t2, T0+t3 position, three solid lines be it is actually detected go out modulus value be more than the correlation of P Value, therefore may determine that there is useful signal transmission on subband 0,1,2, modulus value R0 corresponding t △ 0=0, modulus value R1 is corresponding The interception starting point of t △ n=0, data symbol j are equal to T0+Tcj+ △ 2.
According to the embodiment of the present invention, another method of reception timing detection is provided, as shown in Figure 10, including：
Step 1001, according to the frequency domain resource of subband signal occupancy each in frequency division systems and the length of short lead code, base The short leading of each subband signal mutually orthogonal in the time domain is generated by the way of orthogonal frequency division multiplex OFDM in setting sequence Code, wherein, each subband signal occupies different frequency domain resources, and the length of short lead code is the M/mono-, M of OFDM data symbol For positive integer；
Step 1002, according to the frequency domain resource of subband signal occupancy each in frequency division systems and the length of long preambles code, base The long preambles code of each subband signal mutually orthogonal in the time domain is generated by the way of OFDM in setting sequence, long preambles code Length is N/mono- of OFDM data symbol, and N is positive integer；
The embodiment of the present invention designs lead code with available frequency domain bandwidth, and the lead code of each subband signal uses subband Interior frequency domain resource, the length according to OFDM data symbol can determine the length of long preambles code and the length of short lead code.
Step 1003, the short lead code that a segment signal and each subband signal in frequency division systems are intercepted from reception signal carries out First time domain is related, and the reception signal includes multiple subband signals；
It can be according to the length of short lead code, from one of initial position interception not less than short preamble length for receiving signal Segment signal is related to the first time domain of short lead code progress of subband signal each in frequency division systems.
The short lead code of each subband signal mutually orthogonal in the time domain is generated by the way of OFDM based on setting sequence, So if receiving in signal there are during some subband signal, the peak value that has related to the short lead code time domain of the subband signal goes out It is existing.
Step 1004, the reception of the short lead code of each subband signal in reception signal is determined according to the first time domain correlated results Moment according to the time of reception for receiving the short lead code of each subband signal in signal, determines multiple subbands in corresponding reception signal The start time point T0 of the long preambles code of signal；
The corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal is an estimated value, if connect The short lead code of each subband signal synchronizes in collecting mail number, then each peak value occurred in time domain correlated results is a position, if not It is synchronous, it may appear that the peak value of multiple time locations can estimate general long preambles code at the time of appearance according to peak value Start time point T0, specific method of estimation can be determined flexibly, not do detailed restriction here.
Step 1005, it according to the length of T0 and long preambles code, is intercepted in a segment signal and frequency division systems from receiving in signal It is related that the long preambles code of each subband signal carries out the second time domain；
The signal length intercepted is not less than the length of long preambles code.
Before generating the length of each subband signal mutually orthogonal in the time domain by the way of the OFDM based on setting sequence Leading code, so if receive in signal there are during some subband signal, it is related to the long preambles code time domain of the subband signal to have Peak value occurs.
Step 1006, the reception of the long preambles code of each subband signal in reception signal is determined according to the second time domain correlated results Moment；
Step 1007, it according to the time of reception for receiving the long preambles code of each subband signal in signal, determines to receive in signal The time of reception of the data symbol of each subband signal.
Preferably, the above-mentioned sequence that sets can also be other sequences certainly as zadoff-chu sequences.
Preferably, the short lead code of each subband signal is generated using equation below：
The long preambles code of each subband signal is generated using equation below：
Wherein, Si (k) represents the short lead code of subband signal i, and Li (k) represents the long preambles code of subband signal i, and i is son The number of band signal, L1 are the length of short lead code, and L2 is the length of long preambles code, and a is the frequency band number that subband signal i is occupied Minimum value, b be subband signal i occupy frequency band number maximum value, q is setup parameter, and m is setup parameter, and k is adopted for time domain Sampling point.
It is assumed that overall system bandwidth is 10MHz, is divided into 2 subbands, the width of each subband is 5MHz, Ts=1/15360ms.
Lead code code total length is 1732 Ts (including multiple short lead codes and/or multiple long preambles codes), wherein 768 For front-end A GC, remaining 964 Ts are used for doing timing, frequency deviation and channel estimation Ts.
Each short preamble length is 32, and each long preambles code length is 512, and data symbol length is 1024；
The frequency domain resource on 0 left side is used for subband 0 in Figure 11, and the frequency domain resource on the right is used for subband 1.
The time-domain expression of 0 long preambles code of subband is：
The time-domain expression of 1 long leading code of subband is：
The time-domain expression of 0 short-range missile code of subband is：
The time-domain expression of 0 short-range missile code of subband is：
It is orthogonal in time domain that can prove the long preambles code of subband 0 and 1, and the short lead code of subband 0 and 1 is just in time domain It hands over.
Preferably, when determining to receive the reception of the short lead code of each subband signal in signal according to the first time domain correlated results It carves, specifically includes：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjTo receive subband signal in signal The time of reception of short lead code.
After completion is related to the first time domain of short lead code of all subband signals, possible in sequence there are one the discrete of non-zero Point, it is also possible to have the discrete point of multiple non-zeros.
If there are one the discrete points of non-zero, illustrate that multiple subband signals synchronize, that is, receive each subband signal in signal Time of reception of short lead code be t, it is t to determine T0；
If the discrete point of non-zero is multiple, illustrate that multiple subband signals are asynchronous, that is, receive each subband signal in signal Short lead code the time of reception to be multiple, it be in reception signal in the time of reception of the short lead code of each subband signal to determine T0 Near it is preceding at the time of；Or determining T0 be receive in signal in the time of reception of the short lead code of each subband signal near it is preceding when Carve and near it is rear at the time of between any moment.
Preferably, it is intercepted since T0+ △ each in one section of reception signal and frequency division systems not less than long preambles code length The long preambles code of subband signal carries out the second time domain correlation, and △ is the prefix time length of long preambles code.
Preferably, the reception of the long preambles code of each subband signal in reception signal is determined according to the second time domain correlated results Moment specifically includes：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednTo receive subband signal in signal The time of reception of long preambles code is t relative to the time offset of T0△n；
It is t according to T0 and time offset△n, obtain the time of reception T0+ of the subband signal long preambles code in reception signal t△n。
Preferably, it according to the time of reception for receiving the long preambles code of each subband signal in signal, determines to receive each in signal It the time of reception of the data symbol of subband signal, specifically includes：
Determine that the reception starting point of data symbol j is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is data symbol j to short leading The time gap of code and long preambles code separation, △ 2 is timing adjustment amount.
Based on same inventive concept, a kind of reception timing detection device is additionally provided in the embodiment of the present invention, due to the dress Put that the principle solved the problems, such as is similar to a kind of receiver timing detection method, therefore the implementation of the device may refer to the reality of method It applies, overlaps will not be repeated.
The embodiment of the present invention provides a kind of reception timing detection device, as shown in figure 12, including：
First time domain correlation unit 1201, for intercepting a segment signal and local short lead code in signal and carrying out the from receiving One time domain is related, and the reception signal includes multiple subband signals, and the short lead code of all subband signals and local are short leading Code is identical, and each subband signal rest part in addition to lead code uses whole frequency domain resources uses different frequency domain resources, no Long preambles code with subband signal is the different set time migration based on same local basic sequence；
First determination unit 1202, for according to the first time domain correlated results determine receive signal in each subband signal it is short The time of reception of lead code according to the time of reception for receiving the short lead code of each subband signal in signal, determines that corresponding receive is believed The start time point T0 of the long preambles code of multiple subband signals in number；
For the length according to T0 and local basic sequence, one is intercepted from receiving in signal for second time domain correlation unit 1203 Segment signal is related to the second time domain of local basic sequence progress；
Second determination unit 1204, for determining to receive each subband signal in signal according to the second time domain correlated results The time of reception of long preambles code；
Third determination unit 1205, for according to receive signal in each subband signal long preambles code the time of reception, Determine the time of reception of the data symbol of each subband signal in reception signal.
Preferably, the first determination unit according to the first time domain correlated results determine receive signal in each subband signal it is short before It the time of reception of leading code, specifically includes：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjIf time window [tj- △ 1, tj+△ 1] value of the discrete point is maximum in, it is determined that tjTo receive the time of reception of the short lead code of subband signal in signal.
Preferably, the first determination unit is determined according to the time of reception for receiving the short lead code of each subband signal in signal The corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal, specifically includes：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of and near it is rear at the time of between any moment.
Preferably, the second time domain correlation unit intercepts one section according to the length of T0 and local basic sequence from receiving in signal Signal is related to the second time domain of local basic sequence progress, specifically includes：
One section of reception signal not less than local basic sequence length is intercepted since T0+ △ and carries out second with local basic sequence Time domain is related, and △ is the prefix time length of long preambles code.
Preferably, the second determination unit is determined to receive in signal according to the second time domain correlated results before the length of each subband signal It the time of reception of leading code, specifically includes：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednIf time window [tn- △ 1, tn+△ 1] modulus value of the discrete point is maximum in, it is determined that tnIt is inclined that long preambles code to receive subband signal in signal is based on local basic sequence At the time of shifting after one of setting time；
According to tnCorresponding setting time is determined, by tnCorresponding setting time is elapsed forward, obtains receiving in signal one The time of reception of the long preambles code of subband signal is t relative to the time offset of T0△n；
It is t according to T0 and time offset△nObtain receiving the time of reception T0+t of subband signal long preambles code in signal△n。
Preferably, third determination unit is determined according to the time of reception for receiving the long preambles code of each subband signal in signal The time of reception of the data symbol of each subband signal in signal is received, is specifically included：
Determine that the reception starting point for receiving data symbol j in signal is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is data symbol For j to short lead code and the time gap of long preambles code separation, △ 2 is timing adjustment amount.
The embodiment of the present invention also provides another reception timing detection device, as shown in figure 13, including：
Short lead code determination unit 1301, for the frequency domain resource that is occupied according to each subband signal in frequency division systems and short The length of lead code generates each son mutually orthogonal in the time domain based on setting sequence by the way of orthogonal frequency division multiplex OFDM The short lead code of band signal, wherein, each subband signal occupies different frequency domain resources, and the length of short lead code is accorded with for OFDM data Number M/mono-, M is positive integer；
Long preambles code determination unit 1302, for the frequency domain resource and length occupied according to subband signal each in frequency division systems The length of lead code, before generating the length of each subband signal mutually orthogonal in the time domain by the way of the OFDM based on setting sequence Leading code, the length of long preambles code are N/mono- of OFDM data symbol, and N is positive integer；
First time domain correlation unit 1303 is believed for intercepting a segment signal from reception signal with subband each in frequency division systems Number short lead code carry out that the first time domain is related, and the reception signal includes multiple subband signals；
First determination unit 1304, for according to the first time domain correlated results determine receive signal in each subband signal it is short The time of reception of lead code according to the time of reception for receiving the short lead code of each subband signal in signal, determines that corresponding receive is believed The start time point T0 of the long preambles code of multiple subband signals in number；
For the length according to T0 and long preambles code, one section is intercepted from receiving for second time domain correlation unit 1305 in signal Signal is related to the second time domain of long preambles code progress of subband signal each in frequency division systems；
Second determination unit 1306, for being determined to receive the length of each subband signal in signal according to the second time domain correlated results The time of reception of lead code；
Third determination unit 1307, for according to receive signal in each subband signal long preambles code the time of reception, really Surely the time of reception of the data symbol of each subband signal in signal is received.
Preferably, the sequence that sets is zadoff-chu sequence.
Preferably, short lead code determination unit generates the short lead code of each subband signal using equation below：
Short lead code determination unit generates the long preambles code of each subband signal using equation below：
Wherein, Si (k) represents the short lead code of subband signal i, and Li (k) represents the long preambles code of subband signal i, and i is son The number of band signal, L1 are the length of short lead code, and L2 is the length of long preambles code, and a is the frequency band number that subband signal i is occupied Minimum value, b is the maximum value for the frequency band number that subband signal i is occupied, and q is setup parameter, and m is setup parameter, and k becomes for setting Amount.
Preferably, the first determination unit according to the first time domain correlated results determine receive signal in each subband signal it is short before It the time of reception of leading code, specifically includes：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjIf time window [tj- △ 1, tj+△ 1] value of the discrete point is maximum in, it is determined that tjTo receive the time of reception of the short lead code of subband signal in signal.
Preferably, the first determination unit is determined according to the time of reception for receiving the short lead code of each subband signal in signal The corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal, specifically includes：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive in signal In the time of reception of the short lead code of each subband signal near it is preceding at the time of and near it is rear at the time of between any moment.
Preferably, the second time domain correlation unit is believed according to the length of T0 and long preambles code from one section of interception in signal is received It is related number to carry out the second time domain to the long preambles code of subband signal each in frequency division systems, specifically includes：
One section of reception signal not less than long preambles code length and each subband signal in frequency division systems are intercepted since T0+ △ Long preambles code carry out that the second time domain is related, △ is the prefix time length of long preambles code.
Preferably, the second determination unit determines to receive the length of each subband signal in signal according to the second time domain correlated results It the time of reception of lead code, specifically includes：
No more than the discrete point value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednIf time window [tn- △ 1, tn+△ 1] value of the discrete point is maximum in, it is determined that tnFor receive signal in subband signal long preambles code the time of reception relative to The time offset of T0 is t△n；
It is t according to T0 and time offset△n, obtain the time of reception T0+ of the subband signal long preambles code in reception signal t△n。
Preferably, third determination unit, for according to receive signal in each subband signal long preambles code the time of reception, It determines the time of reception of the data symbol of each subband signal in reception signal, specifically includes：
Determine that the reception starting point of data symbol j is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is data symbol j to short leading The time gap of code and long preambles code separation, △ 2 is timing adjustment amount.
Reception timing detection device in the above embodiment of the present invention is network side apparatus or user-side device.
The embodiment of the present invention also provides a kind of reception timing detection device, including processor and data transceiver, wherein：
The processor is configurable for：A segment signal and local short lead code progress first are intercepted in signal from receiving Time domain is related, and the reception signal includes multiple subband signals, the short lead code of all subband signals and local short lead code It is identical, and each subband signal rest part in addition to lead code uses whole frequency domain resources is different using different frequency domain resources The long preambles code of subband signal is the different set time migration based on same local basic sequence；According to the first time domain correlated results Determine receive signal in each subband signal short lead code the time of reception, according to receive signal in each subband signal it is short leading The time of reception of code determines the corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal；According to T0 and It is related to the second time domain of local basic sequence progress to intercept a segment signal from reception signal for the length of local basic sequence；According to Two time domain correlated results determine to receive the time of reception of the long preambles code of each subband signal in signal；It is each in signal according to receiving The time of reception of the long preambles code of a subband signal, when determining to receive the reception of the data symbol of each subband signal in signal It carves；
Data transceiver transceiving data under the control of a processor.
The embodiment of the present invention also provides a kind of reception timing detection device, including processor and data transceiver, wherein：
The processor is configurable for：The frequency domain resource that is occupied according to each subband signal in frequency division systems and it is short before The length of leading code generates each subband mutually orthogonal in the time domain based on setting sequence by the way of orthogonal frequency division multiplex OFDM The short lead code of signal, wherein, each subband signal occupies different frequency domain resources, and the length of short lead code is OFDM data symbol M/mono-, M is positive integer；The frequency domain resource and the length of long preambles code occupied according to subband signal each in frequency division systems, The long preambles code of each subband signal mutually orthogonal in the time domain, long preambles code are generated by the way of OFDM based on setting sequence Length be OFDM data symbol N/mono-, N is positive integer；It is intercepted in a segment signal and frequency division systems from receiving in signal The short lead code of each subband signal carries out the first time domain correlation, and the reception signal includes multiple subband signals；During according to first Domain correlated results is determined to receive the time of reception of the short lead code of each subband signal in signal, be believed according to each subband in signal is received Number short lead code the time of reception, determine the corresponding start time point for receiving the long preambles code of multiple subband signals in signal T0；According to the length of T0 and long preambles code, the length of a segment signal and each subband signal in frequency division systems is intercepted from reception signal It is related that lead code carries out the second time domain；The long preambles code of each subband signal in reception signal is determined according to the second time domain correlated results The time of reception；According to the time of reception for receiving the long preambles code of each subband signal in signal, determine to receive each subband in signal The time of reception of the data symbol of signal；
Data transceiver transceiving data under the control of a processor.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided The processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices is generated for real The device of function specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then additional changes and modifications may be made to these embodiments.So appended claims be intended to be construed to include it is excellent It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (28)

1. a kind of method of reception timing detection, which is characterized in that including：
It is related to the first time domain of local short lead code progress that a segment signal is intercepted from reception signal, the reception signal includes more A subband signal, the short lead codes of all subband signals is identical with local short lead code, and each subband signal makes except lead code With rest part outside whole frequency domain resources using different frequency domain resources, the long preambles code of different sub-band signal is based on same The different set time migration of local basic sequence；
The time of reception of the short lead code of each subband signal in reception signal is determined according to the first time domain correlated results, according to reception The time of reception of the short lead code of each subband signal in signal determines the corresponding long preambles code for receiving multiple subband signals in signal Start time point T0；
According to the length of T0 and local basic sequence, a segment signal and the second time domain of local basic sequence progress are intercepted in signal from receiving It is related；
The time of reception of the long preambles code of each subband signal in reception signal is determined according to the second time domain correlated results；
According to the time of reception for receiving the long preambles code of each subband signal in signal, determine to receive each subband signal in signal Data symbol the time of reception.
2. the method as described in claim 1, which is characterized in that determined to receive each son in signal according to the first time domain correlated results It the time of reception of the short lead code of band signal, specifically includes：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjFor receive signal in subband signal it is short before The time of reception of leading code.
3. the method as described in claim 1, which is characterized in that the short lead code according to each subband signal in signal is received connects Time receiving carves, and determines the corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal, specifically includes：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive each son in signal In the time of reception of the short lead code of band signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive each son in signal In the time of reception of the short lead code of band signal near it is preceding at the time of and near it is rear at the time of between any moment.
4. the method as described in claim 1, which is characterized in that according to the length of T0 and local basic sequence, from reception signal It is related to the second time domain of local basic sequence progress to intercept a segment signal, specifically includes：
One section of reception signal not less than local basic sequence length is intercepted since T0+ △ and carries out the second time domain with local basic sequence Correlation, △ are the prefix time length of long preambles code.
5. the method as described in claim 1, which is characterized in that determined to receive each son in signal according to the second time domain correlated results It the time of reception of the long preambles code of band signal, specifically includes：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednIf time window [tn- △ 1, tn+ △ 1] in The modulus value of the discrete point is maximum, it is determined that tnLong preambles code to receive subband signal in signal be based on local motif line skew its In after a setting time at the time of, wherein △ 1 is the offset of setting；
According to tnCorresponding setting time is determined, by tnThe corresponding setting time of reserve migration obtains receiving a subband in signal The time of reception of the long preambles code of signal is t relative to the time offset of T0△n；
It is t according to T0 and time offset△nObtain receiving the time of reception T0+t of subband signal long preambles code in signal△n。
6. method as claimed in claim 5, which is characterized in that the long preambles code according to each subband signal in signal is received connects Time receiving carves, and determines to receive the time of reception of the data symbol of each subband signal in signal, specifically include：
Determine that the reception starting point for receiving data symbol j in signal is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is that data symbol j is arrived The time gap of short lead code and long preambles code separation, △ 2 are timing adjustment amounts.
7. a kind of method of reception timing detection, which is characterized in that including：
The frequency domain resource and the length of short lead code occupied according to subband signal each in frequency division systems, is used based on setting sequence The mode of orthogonal frequency division multiplex OFDM generates the short lead code of each subband signal mutually orthogonal in the time domain, wherein, each subband Signal occupies different frequency domain resources, and the length of short lead code is M/mono- of OFDM data symbol, and M is positive integer；
The frequency domain resource and the length of long preambles code occupied according to subband signal each in frequency division systems, is used based on setting sequence The mode of OFDM generates the long preambles code of each subband signal mutually orthogonal in the time domain, and the length of long preambles code is OFDM data N/mono- of symbol, N are positive integer；
It is related to the first time domain of short lead code progress of subband signal each in frequency division systems that a segment signal is intercepted from reception signal, The reception signal includes multiple subband signals；
The time of reception of the short lead code of each subband signal in reception signal is determined according to the first time domain correlated results, according to reception The time of reception of the short lead code of each subband signal in signal determines the corresponding long preambles code for receiving multiple subband signals in signal Start time point T0；
According to the length of T0 and long preambles code, the length of a segment signal and each subband signal in frequency division systems is intercepted from reception signal It is related that lead code carries out the second time domain；
The time of reception of the long preambles code of each subband signal in reception signal is determined according to the second time domain correlated results；
According to the time of reception for receiving the long preambles code of each subband signal in signal, determine to receive the number of each subband signal in signal According to the time of reception of symbol.
8. the method for claim 7, which is characterized in that the sequence that sets is zadoff-chu sequence.
9. method as claimed in claim 7 or 8, which is characterized in that the short leading of each subband signal is generated using equation below Code：
The long preambles code of each subband signal is generated using equation below：
Wherein, Si (k) represents the short lead code of subband signal i, and Li (k) represents the long preambles code of subband signal i, and i believes for subband Number number, L1 be short lead code length, L2 be long preambles code length, a be subband signal i occupy frequency band number most Small value, b are the maximum value for the frequency band number that subband signal i is occupied, and q is setup parameter, and m is setup parameter, and k is setting variable.
10. the method for claim 7, which is characterized in that determine to receive according to the first time domain correlated results each in signal It the time of reception of the short lead code of subband signal, specifically includes：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjFor receive signal in subband signal it is short before The time of reception of leading code.
11. the method for claim 7, which is characterized in that according to the short lead code of each subband signal in reception signal The time of reception determines the corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal, specifically includes：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive each son in signal In the time of reception of the short lead code of band signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive each son in signal In the time of reception of the short lead code of band signal near it is preceding at the time of and near it is rear at the time of between any moment.
12. the method for claim 7, which is characterized in that according to the length of T0 and long preambles code, cut from receiving in signal It takes a segment signal related to the second time domain of long preambles code progress of subband signal each in frequency division systems, specifically includes：
One section of length for receiving signal and each subband signal in frequency division systems not less than long preambles code length is intercepted since T0+ △ Lead code carries out the second time domain correlation, and △ is the prefix time length of long preambles code.
13. the method for claim 7, which is characterized in that determine to receive according to the second time domain correlated results each in signal It the time of reception of the long preambles code of a subband signal, specifically includes：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednTo receive in signal before the length of subband signal The time of reception of leading code is t relative to the time offset of T0△n；
It is t according to T0 and time offset△n, obtain the time of reception T0+t of the subband signal long preambles code in reception signal△n。
14. method as claimed in claim 13, which is characterized in that according to the long preambles code of each subband signal in reception signal The time of reception determines to receive the time of reception of the data symbol of each subband signal in signal, specifically include：
Determine that the reception starting point of data symbol j is equal to T0+t△n+Tcj+ △ 2, wherein TcjData symbol j to short lead code and The time gap of long preambles code separation, △ 2 are timing adjustment amounts.
15. a kind of reception timing detection device, which is characterized in that including：
First time domain correlation unit carries out the first time domain phase for intercepting a segment signal and local short lead code from reception signal It closing, the reception signal includes multiple subband signals, and the short lead code of all subband signals is identical with local short lead code, and Each subband signal rest part in addition to lead code uses whole frequency domain resources uses different frequency domain resources, different sub-band signal Long preambles code be the different set time migration based on same local basic sequence；
First determination unit, for determining to receive the short lead code of each subband signal in signal according to the first time domain correlated results The time of reception according to the time of reception for receiving the short lead code of each subband signal in signal, determines multiple in corresponding reception signal The start time point T0 of the long preambles code of subband signal；
Second time domain correlation unit, for the length according to T0 and local basic sequence, from receive intercepted in signal a segment signal with It is related that local basic sequence carries out the second time domain；
Second determination unit, for being determined to receive the long preambles code of each subband signal in signal according to the second time domain correlated results The time of reception；
Third determination unit, for according to the time of reception for receiving the long preambles code of each subband signal in signal, determining to receive The time of reception of the data symbol of each subband signal in signal.
16. device as claimed in claim 15, which is characterized in that the first determination unit is determined according to the first time domain correlated results The time of reception of the short lead code of each subband signal in signal is received, is specifically included：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjFor receive signal in subband signal it is short before The time of reception of leading code.
17. device as claimed in claim 15, which is characterized in that the first determination unit is according to each subband signal in reception signal Short lead code the time of reception, determine the corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal, It specifically includes：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive each son in signal In the time of reception of the short lead code of band signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive each son in signal In the time of reception of the short lead code of band signal near it is preceding at the time of and near it is rear at the time of between any moment.
18. device as claimed in claim 15, which is characterized in that the second time domain correlation unit is according to T0 and local basic sequence Length, to intercept a segment signal in signal related with the second time domain of local basic sequence progress from receiving, and specifically includes：
One section of reception signal not less than local basic sequence length is intercepted since T0+ △ and carries out the second time domain with local basic sequence Correlation, △ are the prefix time length of long preambles code.
19. device as claimed in claim 15, which is characterized in that the second determination unit is determined according to the second time domain correlated results The time of reception of the long preambles code of each subband signal in signal is received, is specifically included：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednIf time window [tn- △ 1, tn+ △ 1] in The modulus value of the discrete point is maximum, it is determined that tnLong preambles code to receive subband signal in signal be based on local motif line skew its In after a setting time at the time of, wherein △ 1 is the offset of setting；
According to tnCorresponding setting time is determined, by tnCorresponding setting time is elapsed forward, obtains receiving a subband in signal The time of reception of the long preambles code of signal is t relative to the time offset of T0△n；
It is t according to T0 and time offset△nObtain receiving the time of reception T0+t of subband signal long preambles code in signal△n。
20. device as claimed in claim 19, which is characterized in that third determination unit is according to each subband signal in reception signal Long preambles code the time of reception, determine receive signal in each subband signal data symbol the time of reception, specifically include：
Determine that the reception starting point for receiving data symbol j in signal is equal to T0+t△n+Tcj+ △ 2, wherein TcjIt is that data symbol j is arrived The time gap of short lead code and long preambles code separation, △ 2 are timing adjustment amounts.
21. a kind of reception timing detection device, which is characterized in that including：
Short lead code determination unit, for the frequency domain resource that is occupied according to each subband signal in frequency division systems and short lead code Length generates each subband signal mutually orthogonal in the time domain based on setting sequence by the way of orthogonal frequency division multiplex OFDM Short lead code, wherein, each subband signal occupies different frequency domain resources, and the length of short lead code is divided for the M of OFDM data symbol One of, M is positive integer；
Long preambles code determination unit, for the frequency domain resource that is occupied according to each subband signal in frequency division systems and long preambles code Length generates the long preambles code of each subband signal mutually orthogonal in the time domain based on setting sequence by the way of OFDM, long The length of lead code is N/mono- of OFDM data symbol, and N is positive integer；
First time domain correlation unit, for from receive intercepted in signal each subband signal in a segment signal and frequency division systems it is short before Leading code carries out the first time domain correlation, and the reception signal includes multiple subband signals；
First determination unit, for determining to receive the short lead code of each subband signal in signal according to the first time domain correlated results The time of reception according to the time of reception for receiving the short lead code of each subband signal in signal, determines multiple in corresponding reception signal The start time point T0 of the long preambles code of subband signal；
For the length according to T0 and long preambles code, a segment signal and frequency are intercepted from receiving for second time domain correlation unit in signal It is related to carry out the second time domain for the long preambles code of each subband signal in subsystem；
Second determination unit, for determining to receive the long preambles code of each subband signal in signal according to the second time domain correlated results The time of reception；
Third determination unit, for according to the time of reception for receiving the long preambles code of each subband signal in signal, determining to receive letter The time of reception of the data symbol of each subband signal in number.
22. device as claimed in claim 21, which is characterized in that the sequence that sets is zadoff-chu sequence.
23. the device as described in claim 21 or 22, which is characterized in that short lead code determination unit is generated using equation below The short lead code of each subband signal：
Short lead code determination unit generates the long preambles code of each subband signal using equation below：
Wherein, Si (k) represents the short lead code of subband signal i, and Li (k) represents the long preambles code of subband signal i, and i believes for subband Number number, L1 be short lead code length, L2 be long preambles code length, a be subband signal i occupy frequency band number most Small value, b are the maximum value for the frequency band number that subband signal i is occupied, and q is setup parameter, and m is setup parameter, and k is setting variable.
24. device as claimed in claim 21, which is characterized in that the first determination unit is determined according to the first time domain correlated results The time of reception of the short lead code of each subband signal in signal is received, is specifically included：
Modulus value is no more than the discrete point modulus value zero setting of setting thresholding M in the sequence that first time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinedjFor receive signal in subband signal it is short before The time of reception of leading code.
25. device as claimed in claim 21, which is characterized in that the first determination unit is according to each subband signal in reception signal Short lead code the time of reception, determine the corresponding start time point T0 for receiving the long preambles code of multiple subband signals in signal, It specifically includes：
When the time of reception of the short lead code of each subband signal in receiving signal being t, it is t to determine T0；
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive each son in signal In the time of reception of the short lead code of band signal near it is preceding at the time of；Or
When the time of reception of the short lead code of each subband signal in receiving signal is multiple, determine T0 to receive each son in signal In the time of reception of the short lead code of band signal near it is preceding at the time of and near it is rear at the time of between any moment.
26. device as claimed in claim 21, which is characterized in that the second time domain correlation unit is according to the length of T0 and long preambles code Degree, it is related from the second time domain of long preambles code progress that a segment signal and subband signal each in frequency division systems are intercepted in signal is received, It specifically includes：
One section of length for receiving signal and each subband signal in frequency division systems not less than long preambles code length is intercepted since T0+ △ Lead code carries out the second time domain correlation, and △ is the prefix time length of long preambles code.
27. device as claimed in claim 21, which is characterized in that the second determination unit is determined according to the second time domain correlated results The time of reception of the long preambles code of each subband signal in signal is received, is specifically included：
No more than the discrete point value zero setting of setting thresholding P in the sequence that second time domain correlation is obtained；
For the discrete point of each non-zero, the corresponding time point t of the discrete point is determinednTo receive in signal before the length of subband signal The time of reception of leading code is t relative to the time offset of T0△n；
It is t according to T0 and time offset△n, obtain the time of reception T0+t of the subband signal long preambles code in reception signal△n。
28. device as claimed in claim 27, which is characterized in that third determination unit, for according to each son in reception signal The time of reception of the long preambles code of band signal determines to receive the time of reception of the data symbol of each subband signal in signal, specifically Including：
Determine that the reception starting point of data symbol j is equal to T0+t△n+Tcj+ △ 2, wherein TcjData symbol j to short lead code and The time gap of long preambles code separation, △ 2 are timing adjustment amounts.
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