CN105227392A - A kind of method of reception timing detection and device - Google Patents

Abstract

The invention provides a kind of method of reception timing detection and device, the short lead code of wherein all in a kind of method subband signals is identical with the short lead code in this locality, and each subband signal remainder except lead code uses whole frequency domain resource uses different frequency domain resource, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence, uses mutually orthogonal short lead code and long preambles code in another kind of method; Timing when detecting, carries out rough estimate according to short lead code, intercepts segment length's lead code and local basic sequence and carries out time domain relevant time of reception determining the long preambles code of each subband signal in Received signal strength; According to the time of reception of the long preambles code of each subband signal in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength.The invention solves when distributed system adopts the reception problem regularly how determining each subband signal during frequency division fast.

Description

A kind of method of reception timing detection and device

Technical field

The present invention relates to wireless communication technology field, particularly relate to a kind of method of reception timing detection and device.

Background technology

The channel architecture of usual distributed system as shown in Figure 1.Wherein lead code is used for AGC, synchronous and frequency deviation estimation, and physical layer control channel comprises the necessary information solving passed data subsequently.High-level signaling and data are transmitted after physical layer control channel.

As shown in Figure 2, the lead code of non-frequency division systems is made up of short lead code and long preambles code usually, be illustrated in figure 3 IEEE802.11p frame structure, IEEE802.11p defines the short preamble sequence of multiple repetition, the Cyclic Prefix that namely t1 ~ t10, GI2 are the Cyclic Prefix of long preambles code, T1 and T2 be long preambles code, GI is data symbol.

Utilize short lead code to adopt correlation method can roughly determine the time of reception of long preambles code to obtain thick time synchronized, intercept segment length's lead code afterwards and carry out time domain and be correlated with and can estimate the correct time of Received signal strength.Improve estimated accuracy in order to " platform " phenomenon that overcomes in correlation, usually need calculating two autocorrelation value sequences.Detailed process is as follows:

For Received signal strength, intercept short lead code from original position and himself time delay 1 short leader sequence symbol Ns carries out auto-correlation computation, obtain first sequence of correlation values M ₁(θ), 1 short leader sequence symbol is 16 time-domain sampling points, and Ns is 16.

$M_1\left(\mathrm{\θ}\right)=\frac{\underset{m=0}{\overset{\mathrm{Ns}-1}{\mathrm{\Σ}}}r(\mathrm{\θ}+m)\×r*(\mathrm{\θ}+m+\mathrm{Ns})}{\underset{m=0}{\overset{\mathrm{Ns}-1}{\mathrm{\Σ}}}{\left|r(\mathrm{\θ}+m)\right|}^2}$

Wherein, θ is time-domain sampling point, and r is the short preamble sequence intercepted from Received signal strength.

Intercept short lead code from original position and himself time delay 2 short leader sequence symbol Ns carry out auto-correlation computation, obtain second sequence of correlation values M ₂(θ).

$M_2\left(\mathrm{\θ}\right)=\frac{\underset{m=0}{\overset{\mathrm{Ns}-1}{\mathrm{\Σ}}}r(\mathrm{\θ}+m)\×r*(\mathrm{\θ}+m+2\mathrm{Ns})}{\underset{m=0}{\overset{\mathrm{Ns}-1}{\mathrm{\Σ}}}{\left|r(\mathrm{\θ}+m)\right|}^2}$

Wherein, θ is time-domain sampling point, and r is the short preamble sequence intercepted from Received signal strength.

Calculate M ₁(θ)-M ₂(θ) time of reception of short lead code, is determined according to the peak of the sequence obtained:

$\widehat{\mathrm{\θ}}=\arg \underset{\mathrm{\θ}}{\max }(M_1\left(\mathrm{\θ}\right)-M_2\left(\mathrm{\θ}\right))$

Be illustrated in figure 4 the result obtained after two sequence of correlation values are subtracted each other, determine in the moment that position that peak value occurs is corresponding, to determine that this moment forward 1 short leader sequence symbol Ns is the start time T of short lead code.From T+ △, intercept a long preambles code, to do time domain relevant to local long preambles code (basic sequence), and relevant peaks appears in time t _i, determine t _ifor the start time of long preambles code, determine the moment of receiving symbol according to the start time of long preambles code.

As shown in Figure 5, after adopting frequency division mechanism, it is separation that multiple user institute passes data on frequency domain, respectively takies a frequency band, but there occurs overlap in time domain.At receiving terminal, how to determine respectively each frequency band receive data timing become a problem that must solve, but also there is no corresponding Timing Synchronization detection scheme at present.

Summary of the invention

The invention provides a kind of method of reception timing detection and device, solve when distributed system adopts the reception problem regularly how determining each subband signal during frequency division fast.

The invention provides a kind of method of reception timing detection, comprising:

From Received signal strength, intercepting a segment signal and the short lead code in this locality, to carry out the first time domain relevant, described Received signal strength comprises multiple subband signal, the short lead code of all subband signals is identical with the short lead code in this locality, and each subband signal remainder except lead code uses whole frequency domain resource uses different frequency domain resource, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence;

According to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

According to the length of T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant;

According to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

According to the time of reception of the long preambles code of each subband signal in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength.

Preferably, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprise:

The discrete point value zero setting of setting thresholding M is not more than in the sequence obtained of first time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

Preferably, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, specifically comprise:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

Preferably, according to the length of T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than local basic sequence length and local basic sequence, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

Preferably, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprise:

The discrete point value zero setting of setting thresholding P is not more than in the sequence obtained of second time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nif, time window [t _n-△ 1, t _n+ △ 1] in the value of this discrete point maximum, then determine t _nfor the long preambles code of subband signal in Received signal strength offsets the moment after one of them setting-up time based on local basic sequence;

According to t _ndetermine corresponding setting-up time, by t _nthe setting-up time that reserve migration is corresponding, the time of reception obtaining the long preambles code of a subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}obtain the T0+t time of reception of subband signal long preambles code in Received signal strength _{△ n}.

Preferably, according to the time of reception of the long preambles code of subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength, specifically comprise:

Determine that the reception starting point of data symbol j in Received signal strength equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

The present invention also provides a kind of method of reception timing detection, comprising:

The frequency domain resource taken according to subband signal each in frequency division systems and the length of short lead code, the mode of orthogonal frequency division multiplex OFDM is adopted to be created on the short lead code of each subband signal mutually orthogonal in time domain based on setting sequence, wherein, each subband signal takies different frequency domain resource, the length of short lead code is M/mono-of OFDM data symbol, and M is positive integer;

The frequency domain resource taken according to subband signal each in frequency division systems and the length of long preambles code, the mode of OFDM is adopted to be created on the long preambles code of each subband signal mutually orthogonal in time domain based on setting sequence, the length of long preambles code is N/mono-of OFDM data symbol, and N is positive integer;

From Received signal strength, intercepting a segment signal and the short lead code of subband signal each in frequency division systems, to carry out the first time domain relevant, and described Received signal strength comprises multiple subband signal;

According to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

According to the length of T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant;

According to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

According to the time of reception of the long preambles code of subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength.

Preferably, described setting sequence is zadoff-chu sequence.

Preferably, following formula is adopted to generate the short lead code of each subband signal:

$\mathrm{Si}\left(k\right)=\frac{1}{L1}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1||}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L1}*m*k}$

Following formula is adopted to generate the long preambles code of each subband signal:

$\mathrm{Li}\left(k\right)=\frac{1}{L2}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1|}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L2}*m*k}$

Wherein, Si (k) represents the short lead code of subband signal i, Li (k) represents the long preambles code of subband signal i, and i is the numbering of subband signal, and L1 is the length of short lead code, L2 is the length of long preambles code, a is the minimum value of the frequency band number that subband signal i takies, and b is the maximum of the frequency band number that subband signal i takies, and q is setup parameter, m is setup parameter, and k is setting variable.

Preferably, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprise:

The discrete point value zero setting of setting thresholding M is not more than in the sequence obtained of first time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

Preferably, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, specifically comprise:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

Preferably, according to the length of T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to enter the second row time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than long preambles code length and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

Preferably, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprise:

The discrete point value zero setting of setting thresholding P is not more than in the sequence obtained of second time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nfor time of reception of the long preambles code of subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}, obtain the T0+t time of reception of this subband signal long preambles code in Received signal strength _{△ n}.

Preferably, according to the time of reception of the long preambles code of subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength, specifically comprise:

Determine that the reception starting point of data symbol j equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

The present invention also provides a kind of and receives timing detection device, comprising:

First time domain correlation unit, for intercepting the short lead code in a segment signal and this locality from Received signal strength, to carry out the first time domain relevant, described Received signal strength comprises multiple subband signal, the short lead code of all subband signals is identical with the short lead code in this locality, and each subband signal remainder except lead code uses whole frequency domain resource uses different frequency domain resource, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence;

First determining unit, for the time of reception according to the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

Second time domain correlation unit, for the length according to T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant;

Second determining unit, for the time of reception according to the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

3rd determining unit, for the time of reception of the long preambles code according to each subband signal in Received signal strength, determines the time of reception of the data symbol of each subband signal in Received signal strength.

Preferably, the first determining unit, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprises:

The discrete point value zero setting of setting thresholding M is not more than in the sequence obtained of first time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

Preferably, the first determining unit, according to the time of reception of the short lead code of subband signal each in Received signal strength, is determined the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, is specifically comprised:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

Preferably, the second time domain correlation unit is according to the length of T0 and local basic sequence, and from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than local basic sequence length and local basic sequence, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

Preferably, the second determining unit, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprises:

The discrete point value zero setting of setting thresholding P is not more than in the sequence obtained of second time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nif, time window [t _n-△ 1, t _n+ △ 1] in the value of this discrete point maximum, then determine t _nfor the long preambles code of subband signal in Received signal strength offsets the moment after one of them setting-up time based on local basic sequence;

According to t _ndetermine corresponding setting-up time, by t _nthe setting-up time that reserve migration is corresponding, the time of reception obtaining the long preambles code of a subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}obtain the T0+t time of reception of subband signal long preambles code in Received signal strength _{△ n}.

Preferably, the 3rd determining unit, according to the time of reception of the long preambles code of subband signal each in Received signal strength, is determined the time of reception of the data symbol of each subband signal in Received signal strength, is specifically comprised:

Determine that the reception starting point of data symbol j in Received signal strength equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

The present invention also provides a kind of and receives timing detection device, comprises processor and data transceiver, wherein:

Described processor be configured to for: from Received signal strength, intercepting a segment signal and the short lead code in this locality, to carry out the first time domain relevant, described Received signal strength comprises multiple subband signal, the short lead code of all subband signals is identical with the short lead code in this locality, and each subband signal remainder except lead code uses whole frequency domain resource uses different frequency domain resource, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence; According to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength; According to the length of T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant; According to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength; According to the time of reception of the long preambles code of each subband signal in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength;

Data transceiver is transceiving data under the control of a processor.

The present invention also provides a kind of and receives timing detection device, comprising:

Short lead code determining unit, for the length of the frequency domain resource that takies according to subband signal each in frequency division systems and short lead code, the mode of orthogonal frequency division multiplex OFDM is adopted to be created on the short lead code of each subband signal mutually orthogonal in time domain based on setting sequence, wherein, each subband signal takies different frequency domain resource, the length of short lead code is M/mono-of OFDM data symbol, and M is positive integer;

Long preambles code determining unit, for the length of the frequency domain resource that takies according to subband signal each in frequency division systems and long preambles code, the mode of OFDM is adopted to be created on the long preambles code of each subband signal mutually orthogonal in time domain based on setting sequence, the length of long preambles code is N/mono-of OFDM data symbol, and N is positive integer;

First time domain correlation unit, for intercepting a segment signal and the short lead code of subband signal each in frequency division systems from Received signal strength, to carry out the first time domain relevant, and described Received signal strength comprises multiple subband signal;

First determining unit, for the time of reception according to the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

Second time domain correlation unit, for the length according to T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant;

Second determining unit, for the time of reception according to the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

3rd determining unit, for the time of reception of the long preambles code according to subband signal each in Received signal strength, determines the time of reception of the data symbol of each subband signal in Received signal strength.

Preferably, described setting sequence is zadoff-chu sequence.

Preferably, short lead code determining unit adopts following formula to generate the short lead code of each subband signal:

$\mathrm{Si}\left(k\right)=\frac{1}{L1}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1||}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L1}*m*k}$

Short lead code determining unit adopts following formula to generate the long preambles code of each subband signal:

$\mathrm{Li}\left(k\right)=\frac{1}{L2}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1|}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L2}*m*k}$

Wherein, Si (k) represents the short lead code of subband signal i, Li (k) represents the long preambles code of subband signal i, and i is the numbering of subband signal, and L1 is the length of short lead code, L2 is the length of long preambles code, a is the minimum value of the frequency band number that subband signal i takies, and b is the maximum of the frequency band number that subband signal i takies, and q is setup parameter, m is setup parameter, and k is setting variable.

Preferably, the first determining unit, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprises:

The discrete point value zero setting of setting thresholding M is not more than in the sequence obtained of first time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

Preferably, the first determining unit, according to the time of reception of the short lead code of subband signal each in Received signal strength, is determined the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, is specifically comprised:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

Preferably, the second time domain correlation unit is according to the length of T0 and long preambles code, and from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than long preambles code length and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

Preferably, the second determining unit, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprises:

The discrete point value zero setting of setting thresholding P is not more than in the sequence obtained of second time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nfor time of reception of the long preambles code of subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}, obtain the T0+t time of reception of this subband signal long preambles code in Received signal strength _{△ n}.

Preferably, the 3rd determining unit, for the time of reception of the long preambles code according to subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength, specifically comprise:

Determine that the reception starting point of data symbol j equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

The present invention also provides a kind of and receives timing detection device, comprises processor and data transceiver, wherein:

Described processor is configured to for the frequency domain resource taken according to subband signal each in frequency division systems and the length of short lead code, the mode of orthogonal frequency division multiplex OFDM is adopted to be created on the short lead code of each subband signal mutually orthogonal in time domain based on setting sequence, wherein, each subband signal takies different frequency domain resource, the length of short lead code is M/mono-of OFDM data symbol, and M is positive integer; The frequency domain resource taken according to subband signal each in frequency division systems and the length of long preambles code, the mode of OFDM is adopted to be created on the long preambles code of each subband signal mutually orthogonal in time domain based on setting sequence, the length of long preambles code is N/mono-of OFDM data symbol, and N is positive integer; From Received signal strength, intercepting a segment signal and the short lead code of subband signal each in frequency division systems, to carry out the first time domain relevant, and described Received signal strength comprises multiple subband signal; According to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength; According to the length of T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant; According to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength; According to the time of reception of the long preambles code of subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength;

Data transceiver is transceiving data under the control of a processor.

The method of reception timing detection that the embodiment of the present invention provides and device, solve when distributed system adopts the reception problem regularly how determining each subband signal during frequency division fast, the time of reception of data symbol in each subband signal can be determined rapidly and accurately.

Accompanying drawing explanation

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 that defines in IEEE802.11p and long preambles code sequence diagram;

Fig. 4 is two sequence of correlation values subtraction schematic diagrames;

Fig. 5 is the channel architecture schematic diagram of frequency division systems;

A kind of method of reception timing detection flow chart that Fig. 6 provides for the embodiment of the present invention;

Fig. 7 is the frequency division systems schematic diagram comprising nearby frequency bands;

Fig. 8 obtains different sub-band Chief Signal Boatswain lead code schematic diagram for basic sequence being carried out different time skew;

Fig. 9 be Received signal strength and basic sequence are carried out the second time domain relevant after result schematic diagram;

The another kind of method of reception timing detection flow chart that Figure 10 provides for the embodiment of the present invention;

Figure 11 is the frequency domain resource schematic diagram that embodiment of the present invention frequency division systems comprises two subband signals and takies;

The one that Figure 12 provides for the embodiment of the present invention receives timing detection device structure chart;

The another kind that Figure 13 provides for the embodiment of the present invention receives timing detection device structure chart.

Embodiment

Below in conjunction with drawings and Examples, method of reception timing detection provided by the invention and device are illustrated in greater detail.

The problem of the reception timing how determining each subband signal during frequency division is fast adopted in order to solve distributed system, need to determine that in frequency division systems, each subband signal uses which type of short lead code and long preambles code how to carry out timing based on used short lead code and long preambles code and detect.

According to the embodiment of the present invention, provide a kind of method of reception timing detection, as shown in Figure 6, comprising:

Step 601, from Received signal strength, intercepting a segment signal and the short lead code in this locality, to carry out the first time domain relevant, described Received signal strength comprises multiple subband signal, the short lead code of all subband signals is identical with the short lead code in this locality, and each subband signal remainder except lead code uses whole frequency domain resource uses different frequency domain resource, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence;

The method that the present embodiment provides, in frequency division systems, each subband signal uses identical short lead code, and namely the frequency domain resource used identically uses whole frequency domain resource, therefore local short lead code and Received signal strength can be adopted to carry out the first time domain relevant, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength.

Can according to the length of the short lead code in this locality, intercept the segment signal that is not less than local short preamble length and the short lead code in this locality to carry out the first time domain relevant from the original position of Received signal strength.

Step 602, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

In corresponding Received signal strength, the start time point T0 of the long preambles code of multiple subband signal is an estimated value, if the short lead code of each subband signal is synchronous in Received signal strength, then there will be a peak value in the first time domain correlated results, as asynchronous, there will be multiple peak value, the moment occurred according to peak value can estimate the start time point T0 of a general long preambles code, and concrete method of estimation can be determined flexibly, does not do detailed restriction here.

Step 603, according to the length of T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant;

The signal length intercepted is not less than the length of local basic sequence.

Step 604, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

The method that the present embodiment provides, in frequency division systems each subband signal use the long preambles code of identical different sub-band signal be same basic sequence different time skew, here time migration can comprise zero, and namely one of them subband signal directly uses basic sequence as long preambles code.

Because different subband signals uses different long preambles codes, therefore when Received signal strength comprises multiple subband signal, if each subband signal is synchronous, multiple peak value can be there is in corresponding time migration position in the sequence that then the second time domain is relevant, if asynchronous, then peak value has certain skew in corresponding time migration position, thus can determine the time of reception of the long preambles code of each subband signal in Received signal strength.

Step 605, according to the time of reception of the long preambles code of each subband signal in Received signal strength, determines the time of reception of the data symbol of each subband signal in Received signal strength.

In the embodiment of the present invention, the first time domain is relevant relevantly with the second time domain is related operation.

Preferably, the present embodiment, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprises:

The discrete point value zero setting of setting thresholding M is not more than in the sequence obtained of first time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

The discrete point of non-zero may be one also may be multiple.

If the discrete point of non-zero only has one, illustrate that multiple subband signal is synchronous, namely in Received signal strength, the time of reception of the short lead code of each subband signal is t, determines that the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength is t.

If the discrete point of non-zero is multiple, illustrate that multiple subband signal is asynchronous, namely in Received signal strength, the time of reception of the short lead code of each subband signal is multiple, determines that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

Method of reception timing detection provided by the invention, is suitable for being applied to frequency division systems, and as shown in Figure 7, in frequency division systems, each frequency band can be adjacent, and each subband signal takies the frequency domain resource on a frequency band.With N=3, namely have 3 subband signals to be example in frequency division systems, as shown in Figure 8, on the basis of basic sequence, obtain corresponding long preambles code respectively to rear skew t1, skew t2, skew t3, t1 is zero.

Preferably, from T0+ △, intercepting one section of Received signal strength being not less than local basic sequence length and local basic sequence, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

When the long preambles code of long preambles code corresponding to subband signal i, to do the second time domain relevant to basic sequence, and relevant peaks appears in time t _i, wherein t _ifor the long preambles code of subband signal i postpones the moment after one of them setting-up time based on local basic sequence.

According to the time location of local basic sequence and the time location after the difference offset setting time, and t _iposition, can determine postpone t _isetting-up time.

As shown in Figure 9, the first two peak value (bold portion) offsets t0 respectively and overlaps with the position offseting t1 with local basic sequence, 3rd peak value (bold portion) is certain deviation relative to local basic sequence skew t2, therefore first corresponding t0 of peak value, second corresponding t1 of peak value, 3rd the corresponding t2 of peak value, by moment forward t1 corresponding for the second peak value, by moment forward t2 corresponding for the 3rd peak value, long preambles code can be obtained in three subband signals relative to the time offset of T0, wherein in two subband signals, the time offset relative to T0 of long preambles code is 0, wherein in another subband signal, long preambles code is non-zero relative to the time offset of T0.

Preferably, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprise:

In the sequence obtained of second time domain being correlated with, modulus value is not more than the discrete point value zero setting of setting thresholding P, if the sequence obtained be R=R1, R2 ..., time point that RN, R1 are corresponding be the time point that 0, RN is corresponding is Ts*N, Ts is the sampled point interval of signal, and N is the number of discrete point in sequence;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nif, time window [t _n-△ 1, t _n+ △ 1] in the modulus value of this discrete point maximum, then determine t _nfor the long preambles code of subband signal in Received signal strength postpones the moment after one of them setting-up time based on local basic sequence, wherein △ 1 is the side-play amount of setting;

According to t _ndetermine corresponding setting-up time, by t _nthe setting-up time that forward is corresponding, the time of reception obtaining the long preambles code of a subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}obtain the T0+t time of reception of subband signal long preambles code in Received signal strength _{△ n}.

Determine that the reception starting point of data symbol j in Received signal strength equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts, 1/3 of desirable symbol suffix time span.

The embodiment of the present invention can judge the signal that can receive several subband according to the position of the time domain relevant peaks of Received signal strength and local basic sequence, and the time offset of each subband signal, thus determines the receiver window of time domain number.

In the example of figure 9, adopt the long preambles code that receives and local basic sequence to carry out the second time domain relevant, correlated series R can be obtained.Dotted line is T0+t1, T0+t2, T0+t3 position, article three, solid line is the correlation that the actual modulus value detected is greater than P, therefore can judge that subband 0,1,2 all has useful signal to transmit, the t △ 0=0 that modulus value R0 is corresponding, the t △ n=0 that modulus value R1 is corresponding, the intercepting starting point of data symbol j equals T0+Tcj+ △ 2.

According to the embodiment of the present invention, provide another kind of method of reception timing detection, as shown in Figure 10, comprising:

Step 1001, the frequency domain resource taken according to subband signal each in frequency division systems and the length of short lead code, the mode of orthogonal frequency division multiplex OFDM is adopted to be created on the short lead code of each subband signal mutually orthogonal in time domain based on setting sequence, wherein, each subband signal takies different frequency domain resource, the length of short lead code is M/mono-of OFDM data symbol, and M is positive integer;

Step 1002, the frequency domain resource taken according to subband signal each in frequency division systems and the length of long preambles code, the mode of OFDM is adopted to be created on the long preambles code of each subband signal mutually orthogonal in time domain based on setting sequence, the length of long preambles code is N/mono-of OFDM data symbol, and N is positive integer;

The embodiment of the present invention with can frequency domain bandwidth design lead code, the lead code of each subband signal uses the frequency domain resource in subband, and the length according to OFDM data symbol can determine the length of long preambles code and the length of short lead code.

Step 1003, from Received signal strength, intercepting a segment signal and the short lead code of subband signal each in frequency division systems, to carry out the first time domain relevant, and described Received signal strength comprises multiple subband signal;

Can according to the length of short lead code, intercepting the segment signal that is not less than short preamble length and the short lead code of subband signal each frequency division systems from the original position of Received signal strength, to carry out the first time domain relevant.

The mode of OFDM is adopted to be created on the short lead code of each subband signal mutually orthogonal in time domain based on setting sequence, if when therefore there is certain subband signal in Received signal strength, have peak value relevant to the short lead code time domain of this subband signal occurs.

Step 1004, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

In corresponding Received signal strength, the start time point T0 of the long preambles code of multiple subband signal is an estimated value, if the short lead code of each subband signal is synchronous in Received signal strength, the each peak value then occurred in time domain correlated results is a position, as asynchronous, there will be the peak value of multiple time location, the moment occurred according to peak value can estimate the start time point T0 of a general long preambles code, and concrete method of estimation can be determined flexibly, does not do detailed restriction here.

Step 1005, according to the length of T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant;

The signal length intercepted is not less than the length of long preambles code.

Owing to adopting the mode of OFDM to be created on the long preambles code of each subband signal mutually orthogonal in time domain based on setting sequence, if when therefore there is certain subband signal in Received signal strength, have peak value relevant to the long preambles code time domain of this subband signal occurs.

Step 1006, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

Step 1007, according to the time of reception of the long preambles code of subband signal each in Received signal strength, determines the time of reception of the data symbol of each subband signal in Received signal strength.

Preferably, above-mentioned setting sequence is zadoff-chu sequence, can also be other sequence certainly.

Preferably, following formula is adopted to generate the short lead code of each subband signal:

$\mathrm{Si}\left(k\right)=\frac{1}{L1}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1||}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L1}*m*k}$

Following formula is adopted to generate the long preambles code of each subband signal:

$\mathrm{Li}\left(k\right)=\frac{1}{L2}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1|}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L2}*m*k}$

Wherein, Si (k) represents the short lead code of subband signal i, Li (k) represents the long preambles code of subband signal i, and i is the numbering of subband signal, and L1 is the length of short lead code, L2 is the length of long preambles code, a is the minimum value of the frequency band number that subband signal i takies, and b is the maximum of the frequency band number that subband signal i takies, and q is setup parameter, m is setup parameter, and k is time-domain sampling point.

Assuming 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 (comprising multiple short lead code and/or multiple long preambles code), and wherein 768 Ts are used for doing timing, frequency deviation and channel estimating for front-end A GC, remaining 964 Ts.

Each short preamble length is 32, and each long preambles code length is 512, and data symbol length is 1024;

In Figure 11, the frequency domain resource on 0 left side is used for subband 0, and the frequency domain resource on the right is used for subband 1.

The time-domain expression of subband 0 long preambles code is:

$L0\left(k\right)=\frac{1}{512}\underset{m=-149}{\overset{-1}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{149}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{512}*m*k}$

The time-domain expression of the long leading code of subband 1 is:

$L1\left(k\right)=\frac{1}{512}\underset{m=1}{\overset{149}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{149}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{512}*m*k}$

The time-domain expression of subband 0 short-range missile code is:

$S0\left(k\right)=\frac{1}{32}\underset{m=-9}{\overset{-1}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{9}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{32}*m*k}$

The time-domain expression of subband 0 short-range missile code is:

$S1\left(k\right)=\frac{1}{32}\underset{m=1}{\overset{9}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{9}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{512}*m*k}$

Can prove that the long preambles code of subband 0 and 1 is orthogonal in time domain, the short lead code of subband 0 and 1 is orthogonal in time domain.

Preferably, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprise:

In the sequence obtained of first time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding M;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

Complete relevant to short lead code first time domain of all subband signals after, the discrete point of a non-zero may be had in sequence, also may have the discrete point of multiple non-zero.

If the discrete point of non-zero only has one, illustrate that multiple subband signal is synchronous, namely in Received signal strength, the time of reception of the short lead code of each subband signal is t, determines that T0 is t;

If the discrete point of non-zero is multiple, illustrate that multiple subband signal is asynchronous, namely in Received signal strength, the time of reception of the short lead code of each subband signal is multiple, determines that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

Preferably, from T0+ △, intercepting one section of Received signal strength being not less than long preambles code length and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

Preferably, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprise:

In the sequence obtained of second time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding P;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nfor time of reception of the long preambles code of subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}, obtain the T0+t time of reception of this subband signal long preambles code in Received signal strength _{△ n}.

Preferably, according to the time of reception of the long preambles code of subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength, specifically comprise:

Determine that the reception starting point of data symbol j equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

Based on same inventive concept, a kind of reception timing detection device is additionally provided in the embodiment of the present invention, the principle of dealing with problems due to this device is similar to a kind of receiver timing detection method, and therefore the enforcement of this device see the enforcement of method, can repeat part and repeat no more.

The embodiment of the present invention provides a kind of and receives timing detection device, as shown in figure 12, comprising:

First time domain correlation unit 1201, for intercepting the short lead code in a segment signal and this locality from Received signal strength, to carry out the first time domain relevant, described Received signal strength comprises multiple subband signal, the short lead code of all subband signals is identical with the short lead code in this locality, and each subband signal remainder except lead code uses whole frequency domain resource uses different frequency domain resource, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence;

First determining unit 1202, for the time of reception according to the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

Second time domain correlation unit 1203, for the length according to T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant;

Second determining unit 1204, for the time of reception according to the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

3rd determining unit 1205, for the time of reception of the long preambles code according to each subband signal in Received signal strength, determines the time of reception of the data symbol of each subband signal in Received signal strength.

Preferably, the first determining unit, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprises:

In the sequence obtained of first time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding M;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jif, time window [t _j-△ 1, t _j+ △ 1] in the value of this discrete point maximum, then determine t _jfor the time of reception of the short lead code of subband signal in Received signal strength.

Preferably, the first determining unit, according to the time of reception of the short lead code of subband signal each in Received signal strength, is determined the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, is specifically comprised:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

Preferably, the second time domain correlation unit is according to the length of T0 and local basic sequence, and from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than local basic sequence length and local basic sequence, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

Preferably, the second determining unit, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprises:

In the sequence obtained of second time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding P;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nif, time window [t _n-△ 1, t _n+ △ 1] in the modulus value of this discrete point maximum, then determine t _nfor the long preambles code of subband signal in Received signal strength offsets the moment after one of them setting-up time based on local basic sequence;

According to t _ndetermine corresponding setting-up time, by t _nthe setting-up time that forward is corresponding, the time of reception obtaining the long preambles code of a subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}obtain the T0+t time of reception of subband signal long preambles code in Received signal strength _{△ n}.

Preferably, the 3rd determining unit, according to the time of reception of the long preambles code of subband signal each in Received signal strength, is determined the time of reception of the data symbol of each subband signal in Received signal strength, is specifically comprised:

Determine that the reception starting point of data symbol j in Received signal strength equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

The embodiment of the present invention also provides another kind of and receives timing detection device, as shown in figure 13, comprising:

Short lead code determining unit 1301, for the length of the frequency domain resource that takies according to subband signal each in frequency division systems and short lead code, the mode of orthogonal frequency division multiplex OFDM is adopted to be created on the short lead code of each subband signal mutually orthogonal in time domain based on setting sequence, wherein, each subband signal takies different frequency domain resource, the length of short lead code is M/mono-of OFDM data symbol, and M is positive integer;

Long preambles code determining unit 1302, for the length of the frequency domain resource that takies according to subband signal each in frequency division systems and long preambles code, the mode of OFDM is adopted to be created on the long preambles code of each subband signal mutually orthogonal in time domain based on setting sequence, the length of long preambles code is N/mono-of OFDM data symbol, and N is positive integer;

First time domain correlation unit 1303, for intercepting a segment signal and the short lead code of subband signal each in frequency division systems from Received signal strength, to carry out the first time domain relevant, and described Received signal strength comprises multiple subband signal;

First determining unit 1304, for the time of reception according to the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

Second time domain correlation unit 1305, for the length according to T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant;

Second determining unit 1306, for the time of reception according to the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

3rd determining unit 1307, for the time of reception of the long preambles code according to subband signal each in Received signal strength, determines the time of reception of the data symbol of each subband signal in Received signal strength.

Preferably, described setting sequence is zadoff-chu sequence.

Preferably, short lead code determining unit adopts following formula to generate the short lead code of each subband signal:

$\mathrm{Si}\left(k\right)=\frac{1}{L1}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1||}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L1}*m*k}$

Short lead code determining unit adopts following formula to generate the long preambles code of each subband signal:

$\mathrm{Li}\left(k\right)=\frac{1}{L2}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1|}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L2}*m*k}$

Wherein, Si (k) represents the short lead code of subband signal i, Li (k) represents the long preambles code of subband signal i, and i is the numbering of subband signal, and L1 is the length of short lead code, L2 is the length of long preambles code, a is the minimum value of the frequency band number that subband signal i takies, and b is the maximum of the frequency band number that subband signal i takies, and q is setup parameter, m is setup parameter, and k is setting variable.

Preferably, the first determining unit, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprises:

In the sequence obtained of first time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding M;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jif, time window [t _j-△ 1, t _j+ △ 1] in the value of this discrete point maximum, then determine t _jfor the time of reception of the short lead code of subband signal in Received signal strength.

Preferably, the first determining unit, according to the time of reception of the short lead code of subband signal each in Received signal strength, is determined the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, is specifically comprised:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

Preferably, the second time domain correlation unit is according to the length of T0 and long preambles code, and from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than long preambles code length and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

Preferably, the second determining unit, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprises:

The discrete point value zero setting of setting thresholding P is not more than in the sequence obtained of second time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nif, time window [t _n-△ 1, t _n+ △ 1] in the value of this discrete point maximum, then determine t _nfor time of reception of the long preambles code of subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}, obtain the T0+t time of reception of this subband signal long preambles code in Received signal strength _{△ n}.

Preferably, the 3rd determining unit, for the time of reception of the long preambles code according to subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength, specifically comprise:

Determine that the reception starting point of data symbol j equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

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 and receives timing detection device, comprises processor and data transceiver, wherein:

Described processor be configured to for: from Received signal strength, intercepting a segment signal and the short lead code in this locality, to carry out the first time domain relevant, described Received signal strength comprises multiple subband signal, the short lead code of all subband signals is identical with the short lead code in this locality, and each subband signal remainder except lead code uses whole frequency domain resource uses different frequency domain resource, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence; According to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength; According to the length of T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant; According to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength; According to the time of reception of the long preambles code of each subband signal in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength;

Data transceiver is transceiving data under the control of a processor.

The embodiment of the present invention also provides a kind of and receives timing detection device, comprises processor and data transceiver, wherein:

Described processor is configured to for the frequency domain resource taken according to subband signal each in frequency division systems and the length of short lead code, the mode of orthogonal frequency division multiplex OFDM is adopted to be created on the short lead code of each subband signal mutually orthogonal in time domain based on setting sequence, wherein, each subband signal takies different frequency domain resource, the length of short lead code is M/mono-of OFDM data symbol, and M is positive integer; The frequency domain resource taken according to subband signal each in frequency division systems and the length of long preambles code, the mode of OFDM is adopted to be created on the long preambles code of each subband signal mutually orthogonal in time domain based on setting sequence, the length of long preambles code is N/mono-of OFDM data symbol, and N is positive integer; From Received signal strength, intercepting a segment signal and the short lead code of subband signal each in frequency division systems, to carry out the first time domain relevant, and described Received signal strength comprises multiple subband signal; According to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength; According to the length of T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant; According to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength; According to the time of reception of the long preambles code of subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength;

Data transceiver is transceiving data under the control of a processor.

The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.

Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.

Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (28)

1. a method of reception timing detection, is characterized in that, comprising:

From Received signal strength, intercepting a segment signal and the short lead code in this locality, to carry out the first time domain relevant, described Received signal strength comprises multiple subband signal, the short lead code of all subband signals is identical with the short lead code in this locality, and each subband signal remainder except lead code uses whole frequency domain resource uses different frequency domain resource, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence;

According to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

According to the length of T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant;

According to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

According to the time of reception of the long preambles code of each subband signal in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength.

2. the method for claim 1, is characterized in that, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprises:

In the sequence obtained of first time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding M;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

3. the method for claim 1, is characterized in that, according to the time of reception of the short lead code of subband signal each in Received signal strength, determines the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, specifically comprises:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

4. the method for claim 1, is characterized in that, according to the length of T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than local basic sequence length and local basic sequence, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

5. the method for claim 1, is characterized in that, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprises:

In the sequence obtained of second time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding P;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nif, time window [t _n-△ 1, t _n+ △ 1] in the modulus value of this discrete point maximum, then determine t _nfor the long preambles code of subband signal in Received signal strength offsets the moment after one of them setting-up time based on local basic sequence;

According to t _ndetermine corresponding setting-up time, by t _nthe setting-up time that reserve migration is corresponding, the time of reception obtaining the long preambles code of a subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}obtain the T0+t time of reception of subband signal long preambles code in Received signal strength _{△ n}.

6. method as claimed in claim 5, is characterized in that, according to the time of reception of the long preambles code of subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength, specifically comprise:

Determine that the reception starting point of data symbol j in Received signal strength equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

7. a method of reception timing detection, is characterized in that, comprising:

The frequency domain resource taken according to subband signal each in frequency division systems and the length of short lead code, the mode of orthogonal frequency division multiplex OFDM is adopted to be created on the short lead code of each subband signal mutually orthogonal in time domain based on setting sequence, wherein, each subband signal takies different frequency domain resource, the length of short lead code is M/mono-of OFDM data symbol, and M is positive integer;

The frequency domain resource taken according to subband signal each in frequency division systems and the length of long preambles code, the mode of OFDM is adopted to be created on the long preambles code of each subband signal mutually orthogonal in time domain based on setting sequence, the length of long preambles code is N/mono-of OFDM data symbol, and N is positive integer;

From Received signal strength, intercepting a segment signal and the short lead code of subband signal each in frequency division systems, to carry out the first time domain relevant, and described Received signal strength comprises multiple subband signal;

According to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

According to the length of T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant;

According to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

According to the time of reception of the long preambles code of subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength.

8. method as claimed in claim 7, it is characterized in that, described setting sequence is zadoff-chu sequence.

9. method as claimed in claim 7 or 8, is characterized in that, adopt following formula to generate the short lead code of each subband signal:

$\mathrm{Si}\left(k\right)=\frac{1}{L1}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1||}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L1}*m*k}$

Following formula is adopted to generate the long preambles code of each subband signal:

$\mathrm{Li}\left(k\right)=\frac{1}{L2}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1|}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L2}*m*k}$

Wherein, Si (k) represents the short lead code of subband signal i, Li (k) represents the long preambles code of subband signal i, and i is the numbering of subband signal, and L1 is the length of short lead code, L2 is the length of long preambles code, a is the minimum value of the frequency band number that subband signal i takies, and b is the maximum of the frequency band number that subband signal i takies, and q is setup parameter, m is setup parameter, and k is setting variable.

10. method as claimed in claim 7, is characterized in that, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprise:

In the sequence obtained of first time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding M;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

11. methods as claimed in claim 7, is characterized in that, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, specifically comprise:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

12. methods as claimed in claim 7, is characterized in that, according to the length of T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than long preambles code length and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

13. methods as claimed in claim 7, is characterized in that, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprise:

In the sequence obtained of second time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding P;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nfor time of reception of the long preambles code of subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}, obtain the T0+t time of reception of this subband signal long preambles code in Received signal strength _{△ n}.

14. methods as claimed in claim 13, is characterized in that, according to the time of reception of the long preambles code of subband signal each in Received signal strength, determine the time of reception of the data symbol of each subband signal in Received signal strength, specifically comprise:

Determine that the reception starting point of data symbol j equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

15. 1 kinds receive timing detection device, it is characterized in that, comprising:

First time domain correlation unit, for intercepting the short lead code in a segment signal and this locality from Received signal strength, to carry out the first time domain relevant, described Received signal strength comprises multiple subband signal, the short lead code of all subband signals is identical with the short lead code in this locality, and each subband signal remainder except lead code uses whole frequency domain resource uses different frequency domain resource, the long preambles code of different sub-band signal is the different set time migration based on same local basic sequence;

First determining unit, for the time of reception according to the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

Second time domain correlation unit, for the length according to T0 and local basic sequence, from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant;

Second determining unit, for the time of reception according to the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

3rd determining unit, for the time of reception of the long preambles code according to each subband signal in Received signal strength, determines the time of reception of the data symbol of each subband signal in Received signal strength.

16. devices as claimed in claim 15, is characterized in that, the first determining unit, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprises:

In the sequence obtained of first time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding M;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

17. devices as claimed in claim 15, is characterized in that, the first determining unit, according to the time of reception of the short lead code of subband signal each in Received signal strength, is determined the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, specifically comprised:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

18. devices as claimed in claim 15, is characterized in that, the second time domain correlation unit is according to the length of T0 and local basic sequence, and from Received signal strength, intercepting a segment signal and local basic sequence, to carry out the second time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than local basic sequence length and local basic sequence, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

19. devices as claimed in claim 15, is characterized in that, the second determining unit, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprises:

In the sequence obtained of second time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding P;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nif, time window [t _n-△ 1, t _n+ △ 1] in the modulus value of this discrete point maximum, then determine t _nfor the long preambles code of subband signal in Received signal strength offsets the moment after one of them setting-up time based on local basic sequence;

According to t _ndetermine corresponding setting-up time, by t _nthe setting-up time that forward is corresponding, the time of reception obtaining the long preambles code of a subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}obtain the T0+t time of reception of subband signal long preambles code in Received signal strength _{△ n}.

20. devices as claimed in claim 19, it is characterized in that, the 3rd determining unit, according to the time of reception of the long preambles code of subband signal each in Received signal strength, is determined the time of reception of the data symbol of each subband signal in Received signal strength, is specifically comprised:

Determine that the reception starting point of data symbol j in Received signal strength equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.

21. 1 kinds receive timing detection device, it is characterized in that, comprising:

Short lead code determining unit, for the length of the frequency domain resource that takies according to subband signal each in frequency division systems and short lead code, the mode of orthogonal frequency division multiplex OFDM is adopted to be created on the short lead code of each subband signal mutually orthogonal in time domain based on setting sequence, wherein, each subband signal takies different frequency domain resource, the length of short lead code is M/mono-of OFDM data symbol, and M is positive integer;

Long preambles code determining unit, for the length of the frequency domain resource that takies according to subband signal each in frequency division systems and long preambles code, the mode of OFDM is adopted to be created on the long preambles code of each subband signal mutually orthogonal in time domain based on setting sequence, the length of long preambles code is N/mono-of OFDM data symbol, and N is positive integer;

First time domain correlation unit, for intercepting a segment signal and the short lead code of subband signal each in frequency division systems from Received signal strength, to carry out the first time domain relevant, and described Received signal strength comprises multiple subband signal;

First determining unit, for the time of reception according to the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, according to the time of reception of the short lead code of subband signal each in Received signal strength, determine the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength;

Second time domain correlation unit, for the length according to T0 and long preambles code, from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant;

Second determining unit, for the time of reception according to the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength;

3rd determining unit, for the time of reception of the long preambles code according to subband signal each in Received signal strength, determines the time of reception of the data symbol of each subband signal in Received signal strength.

22. devices as claimed in claim 21, it is characterized in that, described setting sequence is zadoff-chu sequence.

23. devices as described in claim 21 or 22, it is characterized in that, short lead code determining unit adopts following formula to generate the short lead code of each subband signal:

$\mathrm{Si}\left(k\right)=\frac{1}{L1}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1||}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L1}*m*k}$

Short lead code determining unit adopts following formula to generate the long preambles code of each subband signal:

$\mathrm{Li}\left(k\right)=\frac{1}{L2}\underset{m=a}{\overset{b}{\mathrm{\Σ}}}{e}^{-\frac{\mathrm{j\π}}{|b-a+1|}*q*m*(m+1)}*e^{\frac{j2\mathrm{\π}}{L2}*m*k}$

Wherein, Si (k) represents the short lead code of subband signal i, Li (k) represents the long preambles code of subband signal i, and i is the numbering of subband signal, and L1 is the length of short lead code, L2 is the length of long preambles code, a is the minimum value of the frequency band number that subband signal i takies, and b is the maximum of the frequency band number that subband signal i takies, and q is setup parameter, m is setup parameter, and k is setting variable.

24. devices as claimed in claim 21, is characterized in that, the first determining unit, according to the time of reception of the short lead code of each subband signal in the first time domain correlated results determination Received signal strength, specifically comprises:

In the sequence obtained of first time domain being correlated with, modulus value is not more than the discrete point modulus value zero setting of setting thresholding M;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _jfor the time of reception of the short lead code of subband signal in Received signal strength.

25. devices as claimed in claim 21, is characterized in that, the first determining unit, according to the time of reception of the short lead code of subband signal each in Received signal strength, is determined the start time point T0 of the long preambles code of multiple subband signal in corresponding Received signal strength, specifically comprised:

When the time of reception of the short lead code of each subband signal is t in Received signal strength, determine that T0 is t;

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is the moment the most forward in the time of reception of the short lead code of each subband signal in Received signal strength; Or

When the time of reception of the short lead code of each subband signal is multiple in Received signal strength, determine that T0 is any instant in the time of reception of the short lead code of each subband signal in Received signal strength between the most forward moment and moment the most rearward.

26. devices as claimed in claim 21, is characterized in that, the second time domain correlation unit is according to the length of T0 and long preambles code, and from Received signal strength, intercepting a segment signal and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, specifically comprises:

From T0+ △, intercepting one section of Received signal strength being not less than long preambles code length and the long preambles code of subband signal each in frequency division systems, to carry out the second time domain relevant, and △ is the prefix time length of long preambles code.

27. devices as claimed in claim 21, is characterized in that, the second determining unit, according to the time of reception of the long preambles code of each subband signal in the second time domain correlated results determination Received signal strength, specifically comprises:

The discrete point value zero setting of setting thresholding P is not more than in the sequence obtained of second time domain being correlated with;

For the discrete point of each non-zero, determine the time point t that this discrete point is corresponding _nfor time of reception of the long preambles code of subband signal in Received signal strength is t relative to the time offset of T0 _{△ n};

Be t according to T0 and time offset _{△ n}, obtain the T0+t time of reception of this subband signal long preambles code in Received signal strength _{△ n}.

28. devices as claimed in claim 27, is characterized in that the 3rd determining unit, for the time of reception of the long preambles code according to subband signal each in Received signal strength, is determined the time of reception of the data symbol of each subband signal in Received signal strength, specifically comprised:

Determine that the reception starting point of data symbol j equals T0+t _{△ n}+ T _cj+ △ 2, wherein T _cjbe data symbol j to the time gap of short lead code and long preambles code separation, △ 2 is timing adjustment amounts.