CN102387582A - Detection method and device for cell group numbers of secondary synchronization sequences of LTE (long term evolution) system - Google Patents

Abstract

The invention discloses a detection method and device for cell group numbers of secondary synchronization sequences of an LTE (long term evolution) system. The method comprises the following steps of: receiving one group of first correlated sequences and eight groups of second correlated sequences; acquiring corresponding thresholds of the correlated sequences; respectively carrying out peak value processing on the first correlated sequences and second correlated sequences according to the thresholds, setting the values, smaller than the thresholds, of the correlated sequences to be zero, and reserving the values, not smaller than the thresholds, of correlated sequences; when the processed first correlated sequences and second correlated sequences have non-zero values, respectively seeking the maximum correlated values in the first correlated sequences and second correlated sequences and the corresponding index values; and calculating according to the index values to obtain the cell group numbers. The detection method and device disclosed by the invention have the advantages that: a process for peak value processing by utilizing the thresholds is added to the traditional detection method, thus the correlated value detected when the frequency point is wrong is filtered out, the condition of error detection when the correlated value obtained by detecting the wrong frequency point is correspondingly used as the detection result is avoided, the error detection rate is reduced and the detection accuracy is improved.

Description

A kind of LTE system's secondary synchronization sequences cell set numbering detection method and device

Technical field

The present invention relates to the LTE communication technical field, relate in particular to a kind of LTE system's secondary synchronization sequences cell set numbering detection method and device.

Background technology

Secondary synchronization sequences SSC in LTE (Long Term Evolution, the Long Term Evolution) system is defined as:

$d\left(2n\right)=\left\{\begin{array}{cc}{s}_0^{\left(m_0\right)}\left(n\right)c_0\left(n\right)& \mathrm{in\; subframe}0\\ s_1^{\left(m_1\right)}\left(n\right)c_0\left(n\right)& \mathrm{in\; subframe}5\end{array}\right.$

$d(2n+1)=\left\{\begin{array}{cc}{s}_1^{\left(m_1\right)}\left(n\right)c_1\left(n\right)z_1^{\left(m_0\right)}\left(n\right)& \mathrm{in\; subframe}0\\ s_0^{\left(m_0\right)}\left(n\right)c_1\left(n\right)z_1^{\left(m_1\right)}\left(n\right)& \mathrm{in\; subframe}5\end{array}\right.---\left(1\right)$

Wherein, 0≤n≤30, the index value m of m sequence ₀And m ₁By the cell ID group number

Generate:

m ₀＝m′mod?31

$m^{\′}=N_{\mathrm{ID}}^{\left(1\right)}+q(q+1)/2,$

According to above-mentioned formula; At first calculate intermediate variable q, then sequence

and

two different cyclic shifts corresponding to m sequence

:

$s_0^{\left(m_0\right)}\left(n\right)=\tilde{s}\left((n+m_0)\mathrm{mod}31\right)$

$s_1^{\left(m_1\right)}\left(n\right)=\tilde{s}\left((n+m_1)\mathrm{mod}31\right)---\left(3\right)$

Wherein

0≤i≤30 definition are as follows:

$x(\stackrel{\‾}{i}+5)=(x(\stackrel{\‾}{i}+2)+x\left(\stackrel{\‾}{i}\right))\mathrm{mod}2,$ $0\≤\stackrel{\‾}{i}\≤25---\left(4\right)$

Initial condition is x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1.

c ₀(n) and c ₁(n) be two scramble sequence, be the m sequence

Different cyclic shifts, shift value depends on P-SCH, also promptly depends on numbering in the cell ID group of synchronous signal sequence

$c_0\left(n\right)=\tilde{c}\left((n+N_{\mathrm{ID}}^{\left(2\right)})\mathrm{mod}31\right)$

$c_1\left(n\right)=\tilde{c}\left((n+N_{\mathrm{ID}}^{\left(2\right)}+3)\mathrm{mod}31\right)---\left(5\right)$

Wherein

0≤i≤30 definition are as follows:

$x(\stackrel{\‾}{i}+5)=(x(\stackrel{\‾}{i}+3)+x\left(\stackrel{\‾}{i}\right))\mathrm{mod}2,$ $0\≤\stackrel{\‾}{i}\≤25$

Initial condition is x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1.

and

also is scrambler sequence, generated by m sequence

cyclic shift:

$z_1^{\left(m_0\right)}\left(n\right)=\tilde{z}\left((n+\left(m_0\mathrm{mod}8\right))\mathrm{mod}31\right)$

$z_1^{\left(m_1\right)}\left(n\right)=\tilde{z}\left((n+\left(m_1\mathrm{mod}8\right))\mathrm{mod}31\right)---\left(6\right)$

Wherein

0≤i≤30 definition are as follows:

$x(\stackrel{\‾}{i}+5)=(x(\stackrel{\‾}{i}+4)+x(\stackrel{\‾}{i}+2)+x(\stackrel{\‾}{i}+1)+x\left(\stackrel{\‾}{i}\right))\mathrm{mod}2,$ $0\≤\stackrel{\‾}{i}\≤25---\left(7\right)$

Initial condition is x (0)=0, x (1)=0, x (2)=0, x (3)=0, x (4)=1.

This shows; In the generative process of secondary synchronization sequences, cell ID group number

is a very important parameter.

Theoretically; In cell search process; If the subdistrict frequency point of the transferring output of frequency point scanning algorithm or high-rise is not real center of housing estate frequency; But during wrong frequency; The result of auxilliary synchronous detecting should be and detects failure; The detection method that does not have the existing cell set numbering of cell set numbering

; No matter be in time domain or in frequency domain; All adopt the good correlation of utilizing the m sequence, confirm the mode of cell set numbering

through the position of detected correlation peak.But; Because it adopts the peaked mode of searching correlation; The synchronizing signal correctness that no matter receives; Peak-peak is found out in the capital; Providing testing result then, obviously, obviously is wrong according to this maximum obtains

; So; This pairing can cause higher false detection rate as the method for testing result according to its maximum position according to searching correlation peak, and accuracy in detection is also lower.

Summary of the invention

In view of this, the present invention provides a kind of LTE system's secondary synchronization sequences cell set numbering detection method and device, and to solve the high problem of detection method false detection rate in the prior art, its concrete scheme is following:

A kind of Long Term Evolution LTE system secondary synchronization sequences cell set numbering detection method comprises:

Receive one group of first correlated series and eight group of second correlated series;

Obtain the corresponding threshold value of said correlated series;

Respectively said first correlated series and second correlated series are carried out the peak value processing according to said threshold value, will keep the correlated series value that is not less than said threshold value less than the correlated series value zero setting of said threshold value;

When all having nonzero value in first correlated series after the said processing and second correlated series, search the maximum related value in said first correlated series and second correlated series respectively, and corresponding index value;

Calculate the cell set numbering according to said index value.

Preferably, the said process of obtaining threshold value according to said correlated series comprises:

Calculate the mean value of the correlation in said first correlated series, and carry out N and doubly handle, obtain the threshold value of first correlated series, said N is a constant;

Calculate the mean value of the correlation in said eight group of second correlated series respectively, and carry out N and doubly handle, obtain the threshold value of eight group of second correlated series.

Preferably, respectively said first correlated series and second correlated series being carried out the process that peak value handles according to said threshold value comprises:

The correlation threshold value corresponding with it with each group correlated series compares respectively, will keep the correlated series value greater than said threshold value less than the correlated series value zero setting of said threshold value.

Preferably, said maximum related value of searching respectively in first correlated series and second correlated series, and the process of corresponding index value comprises:

According to the principle of mould eight congruences the index value of said first correlated series is divided into eight groups, and the correlated series value of correspondence is divided into eight groups;

Find out maximal metric value and corresponding index value thereof in every group;

From eight group of second correlated series, select every group maximal metric value and corresponding index value thereof;

With the corresponding addition of maximal metric value in the maximal metric value in said first correlated series and second correlated series;

Search the maximal metric value after the addition, and corresponding index value is right.

Preferably, the mean value of the correlation in the said calculating correlated series comprises: the arithmetic mean that calculates correlation in the said correlated series.

Preferably, said maximum related value of searching respectively in first correlated series and second correlated series, and the process of corresponding index value comprises:

Search the maximum related value in said first correlated series, and find its corresponding index value;

Search eight maximums respectively, and find its corresponding index value corresponding to eight group of second correlated series;

From said eight maximums, find out maximum, and corresponding index value.

A kind of Long Term Evolution LTE system secondary synchronization sequences cell set numbering checkout gear comprises:

The correlated series receiving element is used to receive one group of first correlated series and eight group of second correlated series;

The threshold value acquiring unit is used to obtain the corresponding threshold value of said correlated series;

The peak value processing unit is used for respectively said first correlated series and second correlated series being carried out the peak value processing according to said threshold value, will keep the correlated series value that is not less than said threshold value less than the correlated series value zero setting of said threshold value;

Maximum related value is searched the unit, is used for when all having nonzero value in first correlated series after the said processing and second correlated series, searches the maximum related value in first correlated series and second correlated series respectively, and corresponding index value;

Cell set numbering computing unit is used for calculating the cell set numbering according to said index value.

Preferably, said threshold value acquiring unit comprises:

The first correlated series threshold value acquiring unit is used to calculate the mean value of the correlation in said first correlated series, and carries out N and doubly handle, and obtains the threshold value of first correlated series, and said N is a constant;

The second correlated series threshold value acquiring unit is used for calculating respectively the mean value of the correlation in said eight group of second correlated series, and carries out N and doubly handle, and obtains the threshold value of eight group of second correlated series.

Preferably, said peak value processing unit comprises:

Comparing unit is used for respectively each correlation threshold value corresponding with it of organizing correlated series being compared;

The zero setting unit is used for the correlated series value zero setting less than said threshold value;

Stick unit is used for the correlated series value greater than said threshold value is left initial value.

Preferably, said maximum related value is searched the unit and is comprised:

Grouped element is used for according to the principle of mould eight congruences the index value of said first correlated series being divided into eight groups, and the correlated series value of correspondence is divided into eight groups;

The first correlated series maximal metric value is searched the unit, is used for finding out maximal metric value and corresponding index value thereof in every group of said eight group of first correlated series;

The second correlated series maximal metric value is searched the unit, is used for selecting from eight group of second correlated series every group maximal metric value and corresponding index value thereof;

Addition unit is used for the corresponding addition of maximal metric value in the maximal metric value of said first correlated series and second correlated series;

Index is to searching the unit, be used to search the maximal metric value after the addition, and corresponding index value is right.

Can find out from above-mentioned technical scheme; Disclosed a kind of LTE system's secondary synchronization sequences cell set numbering detection method of the embodiment of the invention and device; In conventional detection, added and utilized threshold value to carry out the process that peak value is handled; Filtering detected correlation during the frequency mistake; The situation of the erroneous detection that the correlation of having avoided the faults frequency is obtained pairing

causes as testing result takes place; Reduce false detection rate, improved accuracy in detection.

Description of drawings

In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is the disclosed a kind of LTE of an embodiment of the invention system secondary synchronization sequences cell set numbering detection method flow chart;

Fig. 2 is the disclosed another LTE of an embodiment of the invention system secondary synchronization sequences cell set numbering detection method flow chart;

Fig. 3 is a LTE disclosed by the invention system secondary synchronization sequences cell set numbering checkout gear structural representation.

Embodiment

To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.

The invention discloses a kind of LTE system secondary synchronization sequences cell set numbering detection method; In conventional detection, added and utilized threshold value to carry out the process that peak value is handled; Filtering detected performance number during the frequency mistake; The situation of the erroneous detection that the correlation of having avoided the faults frequency is obtained pairing

causes as testing result takes place, and accuracy in detection is provided.For convenience, in describing below, replace first correlated series with correlated series 0, correlated series 1 replaces second correlated series, and its embodiment is following:

The implementation process such as the flow process of a kind of LTE disclosed by the invention system secondary synchronization sequences cell set numbering detection method are as shown in Figure 1, comprising:

Step S11, one group of correlated series 0 of reception and eight groups of correlated serieses 1;

At first obtain one group of correlated series 0 through auto-correlation in this step according to the short sequence in the formula (3)

; The expression with ; Length is 32; Then with behind different

unwinding of

in the formula 1 process; The correlated series 1 that auto-correlation produces; Every group length is 32; With

n=0; 1 ... 7 expressions.

By formula Can find out, no matter m ₀Value what are, it is corresponding

All have only 8 groups, so correlated series 1 is 8 groups.

Step S12, obtain the threshold value corresponding with said correlated series;

Among the present invention, choose a threshold value Γ, utilize this threshold value Γ, the correlation in the correlated series is handled according to the correlated series of input.

Step S13, the said threshold value of foundation are carried out the peak value processing to said correlated series 0 and correlated series 1 respectively, will put 0 less than the correlated series value of said threshold value, keep the correlated series value that is not less than said threshold value;

Processing procedure to correlated series 0 can be passed through following formulate:

${\mathrm{\&eta;}}_0^{\left(m_0\right)}\left(i\right)=\left\{\begin{array}{cc}0& \mathrm{if}{\widetilde{\mathrm{\&eta;}}}_0^{\left(m_0\right)}\left(i\right)<\mathrm{\&Gamma;}\\ {\widetilde{\mathrm{\&eta;}}}_0^{\left(m_0\right)}\left(i\right)& \mathrm{otherwise}\end{array}\right.---\left(8\right)$

With putting 0 less than the correlation of threshold value Γ in the correlated series, more than or equal to the correlation maintenance initial value of threshold value.

Processing procedure to correlated series 1 can be passed through following formulate:

${\mathrm{\&eta;}}_{1,n}^{\left(m_1\right)}\left(i\right)=\left\{\begin{array}{cc}0& \mathrm{if}{\widetilde{\mathrm{\&eta;}}}_{1,n}^{\left(m_1\right)}\left(i\right)<\mathrm{\&Gamma;}\\ {\widetilde{\mathrm{\&eta;}}}_{1,n}^{\left(m_1\right)}\left(i\right)& \mathrm{otherwise}\end{array}\right.n=\mathrm{0,1},...,7---\left(9\right)$

Correlation less than thresholding Γ in eight groups of correlated serieses 1 is changed to 0, remains unchanged more than or equal to the correlation of threshold value.

Through above-mentioned processing; Will be less than the correlation filtering of threshold value Γ; It is the detected value of filtering mistake frequency; Through one group of correlated series 0 of threshold processing, the expression with

; Eight groups of correlated serieses 1 through threshold processing; With

n=0; 1 ... 7 expressions.

Step S14, judge whether the value in the correlated series 0 and 1 after the said processing is 0 entirely, promptly whether all has nonzero value, if, then finish, if not, execution in step S15 then;

When all correlations during, explain that the correlation in the sequence that this time receives is against regulation all less than threshold value Γ.If correlation

and

all are 0; Then it is changed to

and can not be negative owing to number

in the cell ID group; So

expression detects failure; The correlation of input is the detected value of wrong frequency; Therefore do not carry out any processing, process ends.

Step S15, search maximum related value in correlated series 0 and 1, and corresponding index value respectively;

Search the maximum of correlated series 0 and the process of corresponding index value thereof and can use following formulate:

${\mathrm{\&xi;}}_0^{\left(m_0\right)}=\arg \underset{i}{\max }\left\{{\mathrm{\&eta;}}_0^{\left(m_0\right)}(i+1)\right\}---\left(10\right)$

In the formula; represents the pairing index value of maximum related value in the correlated series 0; The implication of this formula is: search a value i; I ∈ 0,1 ...; 30}; When correlation is maximum in its corresponding correlated series 0,, give

with the value of i

Search the maximum of correlated series 1 and the process of corresponding index value thereof and can use following formulate:

${\mathrm{\&xi;}}_1^{\left(m_1\right)}=\arg \underset{i}{\max }\left\{{\mathrm{\&eta;}}_{1,n}^{\left(m_1\right)}(i+1)\right\}---\left(11\right)$

Wherein,

n＝0，1，...，7

i∈{0，1，...，30}

From eight groups of correlated serieses 1, find out maximum related value, and corresponding index value.

Step S16, calculate cell set numbering according to said index value.

At first, compose respectively to the parameter in the different m sequences obtaining two index values in the above-mentioned steps according to following formula,

$m_0=\min \{{\mathrm{\&xi;}}_0^{\left(m_0\right)},{\mathrm{\&xi;}}_1^{\left(m_1\right)}\}$ (12)

$m_1=\max \{{\mathrm{\&xi;}}_0^{\left(m_0\right)},{\mathrm{\&xi;}}_1^{\left(m_1\right)}\}$

Less value is composed to m ₀, higher value is composed to m ₁

Calculate cell set numbering

according to following formula then

m′＝31(m ₁-m ₀-1)+m ₀

$N_{\mathrm{ID}}^{\left(1\right)}=m^{\&prime;}-q(q+1)/2$

Testing process finishes.

In the disclosed LTE of the present embodiment system secondary synchronization sequences cell set numbering detection method; Increased the process of utilizing threshold value that the correlation of input is handled; Through predefined threshold value; Signal less than threshold value in the correlation of input is carried out the zero setting processing, reduced the probability that the correlation corresponding with wrong frequency occurs in correlation to be detected, realized reducing of the influence of the corresponding correlation of wrong frequency testing result with this; Reduce false drop rate, improved accuracy in detection.

In the LTE disclosed by the invention system secondary synchronization sequences cell set numbering detection method, choosing of threshold value is the basis of entire process process, and the mode of choosing that it is concrete is the value according to input signal; Select an empirical value, empirical value obtains in a large amount of practical applications for the technical staff, can embody the value of the corresponding correlation magnitude range of most correct frequencies; Therefrom select a value,, utilize this empirical value as discriminant value; Signal to input carries out threshold processing; Its concrete selection course can for to the input one group of correlated series 0 and eight groups of 1 of correlated serieses choose a threshold value, with this threshold value nine groups of list entries are handled, also can for; Each group sequence is chosen a threshold value respectively, handle the data of each group respectively.Perhaps,, all belong to protection scope of the present invention so long as, set the mode of threshold value according to thought of the present invention for other the mode of choosing.In two kinds of above-mentioned implementations; Each group sequence is chosen a threshold value respectively, handle the method for the data of each group respectively and more only choose a threshold value, the method for using this threshold value that nine groups of list entries are handled; Accuracy is higher, and false drop rate is lower.

The flow process of another LTE disclosed by the invention system secondary synchronization sequences cell set numbering detection method is as shown in Figure 2, comprising:

Step S21, one group of correlated series 0 of reception and eight groups of correlated serieses 1, said correlated series is 32;

The input data are similarly one group of correlated series 0 in the present embodiment; Length is 32, the expression with

; Eight groups of correlated serieses 1; Every group length is 32; With

n=0; 1 ... 7 expressions.

The mean value of the correlation in step S22, the said correlated series 0 of calculating, and carry out N and doubly handle, obtaining the threshold value of correlated series 0, said N is an arbitrary constant;

Said process can be accomplished through following formula:

${\mathrm{\&Gamma;}}_0^{\left(m_0\right)}=N\underset{i=0}{\overset{31}{\mathrm{\&Sigma;}}}{\widetilde{\mathrm{\&eta;}}}_0^{\left(m_0\right)}\left(i\right)/32---\left(14\right)$

Wherein, is the threshold value of correlated series 0; N is an arbitrary constant, and its occurrence can be chosen according to actual conditions.

Step S23, calculate the mean value of the correlation in said eight groups of correlated serieses 1 respectively, and carry out N and doubly handle, obtain the threshold value of eight groups of correlated serieses 1;

Can accomplish said process with following formula equally:

${\mathrm{\&Gamma;}}_{1,n}^{\left(m_1\right)}=N\underset{i=0}{\overset{31}{\mathrm{\&Sigma;}}}{\widetilde{\mathrm{\&eta;}}}_{1,n}^{\left(m_1\right)}\left(i\right)/32---\left(15\right)$

Wherein, n=0,1 ... 7,, N is a constant.The threshold value of

expression n group correlated series 1.Utilize above-mentioned formula, can calculate the threshold value of each group correlated series 1 correspondence respectively.

Step S24, the correlation threshold value corresponding with it with each group correlated series compares respectively, will put 0 less than the correlated series value of said threshold value, and reservation is greater than the correlated series value of said threshold value;

To the processing procedure of correlated series 0, can use following formula to realize:

${\mathrm{\&eta;}}_0^{\left(m_0\right)}\left(i\right)=\left\{\begin{array}{cc}0& \mathrm{if}{\widetilde{\mathrm{\&eta;}}}_0^{\left(m_0\right)}\left(i\right)<{\mathrm{\&Gamma;}}_0^{\left(m_0\right)}\\ {\widetilde{\mathrm{\&eta;}}}_0^{\left(m_0\right)}\left(i\right)& \mathrm{otherwise}\end{array}\right.---\left(16\right)$

To put 0 less than the correlated series value of

, keep correlated series value greater than .

The processing procedure of correlated series 1 need be organized correlated series 1 threshold value corresponding with it with each and compare,

${\mathrm{\&eta;}}_{1,n}^{\left(m_1\right)}\left(i\right)=\left\{\begin{array}{cc}0& \mathrm{if}{\widetilde{\mathrm{\&eta;}}}_{1,n}^{\left(m_1\right)}\left(i\right)<{\mathrm{\&Gamma;}}_{1,n}^{\left(m_1\right)}\\ {\widetilde{\mathrm{\&eta;}}}_{1,n}^{\left(m_1\right)}\left(i\right)& \mathrm{otherwise}\end{array}\right.n=\mathrm{0,1},...,7---\left(17\right)$

Obtain eight groups of correlated serieses 1 after the processing.

Step S25, judge whether the value in the correlated series 0 and 1 after the said processing is 0 entirely, if, then finish, if not, execution in step S26 then;

Step S26, the index value of said correlated series 0 is divided into 8 groups, and the correlated series value of correspondence is divided into eight groups according to the principle of mould 8 congruences;

The index value of correlated series 0 is 0-31, and index value and 8 is carried out modular arithmetic, and the remainder that obtains is 0-7, and the pairing correlated series value of the index value that remainder is identical is divided into one group, obtains eight groups of correlated serieses 0 altogether.

Step S27, find out maximal metric value and corresponding index value thereof in every group;

Find out the maximum related value in above-mentioned 8 groups of correlated serieses 0 respectively, and corresponding index value.Its process following formula capable of using is accomplished:

At first find the maximum

in each group

${\mathrm{\&eta;}}_0^{\&prime;\left(m_0\right)}\left(n\right)=\max \{{\mathrm{\&eta;}}_0^{\left(m_0\right)}(n+1)+8i\}---\left(18\right)$

Then, obtain its corresponding index value

${\mathrm{\&xi;}}_0^{\left(m_0\right)}\left(n\right)=n+8*\arg \underset{i}{\max }\left\{{\widetilde{\mathrm{\&eta;}}}_0^{\left(m_0\right)}(n+1+8i)\right\}---\left(19\right)$

N=0 wherein, 1 ..., 7, and

$\left\{\begin{array}{cc}i\&Element;\left\{\mathrm{0,1,2,3}\right\}& n=\mathrm{0,1},...,6\\ i\&Element;\left\{\mathrm{0,1,2}\right\}& n=7\end{array}\right.$

Step S28, from 8 groups of correlated serieses 1, select every group maximum related value and corresponding index value thereof;

In like manner find maximum related value and corresponding index value thereof in the correlated series 1,

${\mathrm{\&eta;}}_1^{\&prime;\left(m_1\right)}\left(n\right)=\max \left\{{\widetilde{\mathrm{\&eta;}}}_{1,n}^{\left(m_1\right)}(i+1)\right\}---\left(20\right)$

${\mathrm{\&xi;}}_1^{\left(m_1\right)}\left(n\right)=\arg \underset{i}{\max }\left\{{\widetilde{\mathrm{\&eta;}}}_{1,n}^{\left(m_1\right)}(i+1)\right\}---\left(21\right)$

Wherein

n＝0，1，...，7

i∈{0，1，...，30}

Step S29, with the corresponding addition of maximum related value in the maximum related value in the said correlated series 0 and the correlated series 1;

According to the following equation:

$\mathrm{\&eta;}\left(n\right)={\mathrm{\&eta;}}_0^{\&prime;\left(m_0\right)}\left(n\right)+{\mathrm{\&eta;}}_1^{\&prime;\left(m_1\right)}\left(n\right),n=\mathrm{0,1},...,7---\left(22\right)$

With eight groups of correlated serieses 0 and eight groups of correlated series 1 corresponding additions, obtain eight additive values.

Step S210, search the maximum related value after the addition, and corresponding index value is right;

From eight additive values, choose, and obtain the index value of two correlated series values of addition big value.

Step S29 and S210 can merge into a step equally, do not adopt addition successively, and be still also passable according to the mode of searching big value and manipulative indexing value thereof.

Step S211, calculate cell set numbering according to said index value.

According to formula 12, less value is composed to m equally ₀, higher value is composed to m ₁

Calculate cell set numbering

according to formula 13 then

In the disclosed LTE of the present embodiment system secondary synchronization sequences cell set numbering detection method; Adopt the mode of calculating the arithmetic mean of correlation in each group correlated series respectively to obtain threshold value corresponding to every group; Choosing according to the correlated series of input of this threshold value is different and different; And, can embody the correlation that each organizes the correlated series of input intuitively, make testing process more accurate with this as distinguishing rule; Further reduce the false drop rate in the testing process, guaranteed the accuracy of secondary synchronization sequences.

Present embodiment is not limited in the processing procedure; Behind the principle processing correlated series 0 according to mould eight congruences,, choose the method for maximum related value again with correlated series 1 addition; Can directly search the maximum related value in the said correlated series 0 equally, and find its corresponding index value; Search eight maximums respectively, and find its corresponding index value corresponding to eight groups of correlated serieses 1; From said eight maximums, find out the maximum of whole correlated series 1 then, and corresponding index value, the accuracy as a result that obtains after just handling according to the principle of above-mentioned mould eight congruences is higher.

Simultaneously, present embodiment does not limit and adopts the mode of calculating the arithmetic mean in every group of correlated series to obtain threshold value, can be geometrical mean or weighted average yet.Adopt weighted average, because the size of average not only depends on the size of each correlation in every group, and depend on the number of times that each correlation occurs, so to a certain extent, its accuracy is higher, and is more reasonable.But, utilize the method amount of calculation of weighted average to strengthen, process is comparatively complicated, so present embodiment has been chosen arithmetic mean.

The present invention discloses a kind of LTE system secondary synchronization sequences cell set numbering checkout gear; Its structure is as shown in Figure 3; Comprise: correlated series receiving element 31, threshold value acquiring unit 32, peak value processing unit 33, maximum related value are searched unit 34 and cell set numbering computing unit 35, wherein:

Correlated series receiving element 31 is used to receive one group of correlated series 0 and eight groups of correlated serieses 1, and said correlated series is 32; Threshold value acquiring unit 32 is used to obtain the threshold value corresponding with said correlated series; Peak value processing unit 33 is used for respectively said correlated series 0 and correlated series 1 being carried out peak value according to said threshold value to be handled, and will keep the correlated series value that is not less than said threshold value less than the correlated series value zero setting of said threshold value; Maximum related value is searched unit 34 and is used for when all having nonzero value in the correlated series after the said processing 0 and 1, searches the maximum related value in correlated series 0 and 1 respectively, and corresponding index value; Cell set numbering computing unit 35 is used for calculating the cell set numbering according to said index value.

Wherein, the threshold value acquiring unit comprises 32: correlated series 0 threshold value acquiring unit 321, and be used to calculate the mean value of the correlation in the said correlated series 0, and carry out N and doubly handle, obtain the threshold value of correlated series 0, said N is a constant; Correlated series 1 threshold value acquiring unit 322 is used for calculating respectively the mean value of the correlation in said eight groups of correlated serieses 1, and carries out N and doubly handle, and obtains the threshold value of eight groups of correlated serieses 1.Certainly, it also can directly obtain or choose an empirical value, as threshold value.

Peak value processing unit 33 comprises: comparing unit 331 is used for respectively each correlation threshold value corresponding with it of organizing correlated series being compared; Zero setting unit 332 is used for the correlated series value less than said threshold value is put 0; Stick unit 333 is used for the correlated series value that is not less than said threshold value is left initial value.

Maximum related value is searched unit 34 and comprised: grouped element 341 is used for according to the principle of mould 8 congruences the index value of said correlated series 0 being divided into 8 groups, and the correlated series value of correspondence is divided into eight groups; Correlated series 0 maximum related value is searched unit 342, is used for finding out maximum related value and corresponding index value thereof in 0 every group of said 8 groups of correlated series; Correlated series 1 maximum related value is searched unit 343, is used for selecting from 8 groups of correlated serieses 1 every group maximum related value and corresponding index value thereof; Addition unit 344 is used for the corresponding addition of maximum related value in the maximum related value of said correlated series 0 and the correlated series 1; Index is to searching unit 345, be used to search the maximum related value after the addition, and corresponding index value is right.Certainly, this correlation is searched the unit also can adopt the maximum directly found out in the correlated series 0 and the peaked mode in the correlated series 1, its corresponding index value of reentrying.

This device in, receive the correlated series 0 and 1 of input when correlated series receiving element 31 after, correlated series 0 and 1 is sent into threshold value acquiring unit 32; Threshold value acquiring unit 32 is chosen an empirical value according to the correlated series of input; Perhaps, calculate each group corresponding average, obtain threshold value; Peak value processing unit 33 utilizes the signal value of threshold value filtering less than the wrong frequency of threshold value; To guarantee that these incorrect signal values can not influence testing result in the subsequent processes, influence detects accuracy rate.Search maximum related value and corresponding index value thereof in correlated series 0 and the correlated series 1 then, and then obtain the cell set numbering.

The concrete operations that each unit is carried out in this device can be repeated no more at this with reference to aforesaid method embodiment.

Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed device of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part is partly explained referring to method and is got final product.

The professional can also further recognize; The unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein; Can realize with electronic hardware, computer software or the combination of the two; For the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in above-mentioned explanation.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each certain applications, but this realization should not thought and exceeds scope of the present invention.

The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can be directly with the software modules of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.

To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.

Claims (10)

1. a Long Term Evolution LTE system secondary synchronization sequences cell set numbering detection method is characterized in that, comprising:

Receive one group of first correlated series and eight group of second correlated series;

Obtain the corresponding threshold value of said correlated series;

Respectively said first correlated series and second correlated series are carried out the peak value processing according to said threshold value, will keep the correlated series value that is not less than said threshold value less than the correlated series value zero setting of said threshold value;

When all having nonzero value in first correlated series after the said processing and second correlated series, search the maximum related value in said first correlated series and second correlated series respectively, and corresponding index value;

Calculate the cell set numbering according to said index value.

2. method according to claim 1 is characterized in that, the said process of obtaining threshold value according to said correlated series comprises:

Calculate the mean value of the correlation in said first correlated series, and carry out N and doubly handle, obtain the threshold value of first correlated series, said N is a constant;

Calculate the mean value of the correlation in said eight group of second correlated series respectively, and carry out N and doubly handle, obtain the threshold value of eight group of second correlated series.

3. method according to claim 2 is characterized in that, respectively said first correlated series and second correlated series is carried out the process that peak value handles according to said threshold value and comprises:

The correlation threshold value corresponding with it with each group correlated series compares respectively, will keep the correlated series value greater than said threshold value less than the correlated series value zero setting of said threshold value.

4. method according to claim 3 is characterized in that, said maximum related value of searching respectively in first correlated series and second correlated series, and the process of corresponding index value comprises:

According to the principle of mould eight congruences the index value of said first correlated series is divided into eight groups, and the correlated series value of correspondence is divided into eight groups;

Find out maximal metric value and corresponding index value thereof in every group;

From eight group of second correlated series, select every group maximal metric value and corresponding index value thereof;

With the corresponding addition of maximal metric value in the maximal metric value in said first correlated series and second correlated series;

Search the maximal metric value after the addition, and corresponding index value is right.

5. according to any described method among the claim 2-4, it is characterized in that the mean value of the correlation in the said calculating correlated series comprises: the arithmetic mean that calculates correlation in the said correlated series.

6. method according to claim 3 is characterized in that, said maximum related value of searching respectively in first correlated series and second correlated series, and the process of corresponding index value comprises:

Search the maximum related value in said first correlated series, and find its corresponding index value;

Search eight maximums respectively, and find its corresponding index value corresponding to eight group of second correlated series;

From said eight maximums, find out maximum, and corresponding index value.

7. a Long Term Evolution LTE system secondary synchronization sequences cell set numbering checkout gear is characterized in that, comprising:

The correlated series receiving element is used to receive one group of first correlated series and eight group of second correlated series;

The threshold value acquiring unit is used to obtain the corresponding threshold value of said correlated series;

The peak value processing unit is used for respectively said first correlated series and second correlated series being carried out the peak value processing according to said threshold value, will keep the correlated series value that is not less than said threshold value less than the correlated series value zero setting of said threshold value;

Maximum related value is searched the unit, is used for when all having nonzero value in first correlated series after the said processing and second correlated series, searches the maximum related value in first correlated series and second correlated series respectively, and corresponding index value;

Cell set numbering computing unit is used for calculating the cell set numbering according to said index value.

8. device according to claim 7 is characterized in that, said threshold value acquiring unit comprises:

The first correlated series threshold value acquiring unit is used to calculate the mean value of the correlation in said first correlated series, and carries out N and doubly handle, and obtains the threshold value of first correlated series, and said N is a constant;

The second correlated series threshold value acquiring unit is used for calculating respectively the mean value of the correlation in said eight group of second correlated series, and carries out N and doubly handle, and obtains the threshold value of eight group of second correlated series.

9. device according to claim 8 is characterized in that, said peak value processing unit comprises:

Comparing unit is used for respectively each correlation threshold value corresponding with it of organizing correlated series being compared;

The zero setting unit is used for the correlated series value zero setting less than said threshold value;

Stick unit is used for the correlated series value greater than said threshold value is left initial value.

10. device according to claim 9 is characterized in that, said maximum related value is searched the unit and comprised:

Grouped element is used for according to the principle of mould eight congruences the index value of said first correlated series being divided into eight groups, and the correlated series value of correspondence is divided into eight groups;

The first correlated series maximal metric value is searched the unit, is used for finding out maximal metric value and corresponding index value thereof in every group of said eight group of first correlated series;

The second correlated series maximal metric value is searched the unit, is used for selecting from eight group of second correlated series every group maximal metric value and corresponding index value thereof;

Addition unit is used for the corresponding addition of maximal metric value in the maximal metric value of said first correlated series and second correlated series;

Index is to searching the unit, be used to search the maximal metric value after the addition, and corresponding index value is right.

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