CN105722184B - Handle the method and mobile radio communication terminal equipment of received digitized signal - Google Patents

Abstract

Disclosed herein is the methods and mobile radio communication terminal equipment that handle received digitized signal.A kind of mobile radio communication terminal equipment may include at least one circuit for the method for being configured as implementing to handle the digitized signal received, this method comprises: determining multiple cross-correlation coefficients for the digitized signal received.Each of multiple cross-correlation coefficients cross-correlation coefficient, which can be by the way that the digitized signal received candidate mobile radio local reference signal corresponding with multiple pre-stored candidate mobile radio local reference signals is carried out cross-correlation, to be determined.At least one circuit can be additionally configured to: one or more cross-correlation coefficients are selected from identified multiple cross-correlation coefficients, and mobile radio cell scan is executed based on one or more of selected cross-correlation coefficient, so that it is determined that the mobile radio communication network to be connected to.

Description

Handle the method and mobile radio communication terminal equipment of received digitized signal

Technical field

The method that various aspects of the disclosure relates generally to fast parallel frequency scanning in mobile communication.

Background technique

In order to find all surrounding's mobile radio cells, such as mobile radio of user equipment (UE) etc Terminal device usually requires activation frequency scanning in some cases and cell scan (is collectively known as public land mobile network (PLMN) search for) process.Typical example is his/her mobile radio communication terminal when user has just enter into new country Equipment does not have any priori knowledge about mobile radio communication network around it.In these cases, scanning speed can Can be critically important, because it directly affects user experience (for example, when user walks out aircraft, if he/her moves at his/her Terminal radio equipment attaches the symbol a few minutes such as have to before a certain mobile radio communication network, then he/her will It may be unhappy).

Conventional public land mobile network (PLMN) search generally includes two continuous processing, that is, frequency scanning and Mobile radio cell (CELL) scanning.First against all candidate enhanced general mobile communication system (UMTS) radio It accesses (E-UTRA) absolute RF channel number (EARFCN) and implements frequency scanning to include mobile radio cell to most probable Frequency is identified.After frequency scanning, implement mobile radio cell for each EARFCN in so-called short list Scanning is to check for mobile radio cell.

Several factors promote frequency/cell scan process speed typically together.They be mainly frequency scan time, The cell scan time of frequency scanning output (that is, mobile radio cell scan inputs) quality and every EARFCN.

In conventional PLMN searching method, when candidate EARFCN it is in a large number when, spent in frequency scanning when Between may be considerably long.In long term evolution (LTE) system, 692 EARFCN are defined in total.

In conventional frequency scanning, the frequency scanning based on received signal strength indicator (RSSI) has been used.Utilize base In the frequency scanning of RSSI, the time spent during frequency scanning is generally shorter.However, since it is vulnerable to wireless from other It is electrically accessed the interference of technology (RAT), therefore frequency scanning output quality may be very poor in LTE mobile radio communication network. Therefore, the time spent in entire PLMN search may be considerably long and can not endure.

Summary of the invention

An aspect of of the present present invention provides a kind of mobile radio communication terminal equipment, which sets The standby circuit for being configured as implementing the method for handling the digitized signal received including at least one, the method packet It includes: determining multiple cross-correlation coefficients for the digitized signal received, wherein every in the multiple cross-correlation coefficient One cross-correlation coefficient is by the way that the digitized signal received and multiple pre-stored candidate mobile radios is local Corresponding candidate's mobile radio local reference signal carries out cross-correlation to determine in reference signal；From it is identified it is multiple mutually One or more cross-correlation coefficients are selected in related coefficient；And based on one or more of selected cross-correlation coefficient come Mobile radio cell scan is executed, mobile radio communication network is thus connected to.

An aspect of of the present present invention provides a kind of mobile radio communication terminal equipment, which sets The standby circuit for being configured as implementing the method for handling the digitized signal received including at least one, the method packet It includes: determining multiple cross-correlation coefficients for the digitized signal received, wherein every in the multiple cross-correlation coefficient One cross-correlation coefficient is by the way that the digitized signal received and multiple pre-stored candidate mobile radios is local Corresponding candidate's mobile radio local reference signal carries out cross-correlation to determine in reference signal；From it is identified it is multiple mutually One or more cross-correlation coefficients are selected in related coefficient；And based on one or more of selected cross-correlation coefficient come Carrier wave polymerization processing is executed, mobile radio communication network is thus connected to.

An aspect of of the present present invention provides a kind of mobile radio communication terminal equipment, which sets The standby circuit for being configured as implementing the method for handling the digitized signal received including at least one, the method packet It includes: by least one in the digitized signal received and multiple pre-stored candidate mobile radio local reference signals It is a to be compared with the multiple cross-correlation coefficients of determination；And mobile radio is directed to based on identified multiple cross-correlation coefficients Communication network executes mobile radio cell scan.

An aspect of of the present present invention provides a kind of method of digitized signal for handling and receiving, this method comprises: being directed to The digitized signal received determines multiple cross-correlation coefficients, wherein each of the multiple cross-correlation coefficient is mutual Related coefficient is by believing the digitized signal received and multiple pre-stored candidate mobile radio local references Corresponding candidate's mobile radio local reference signal carries out cross-correlation to determine in number；From identified multiple cross correlations One or more cross-correlation coefficients are selected in number；And selected cross-correlation coefficient executes mobile nothing based on one or more Line electricity cell scan, is thus connected to mobile radio communication network.

Detailed description of the invention

In the accompanying drawings, identical part is generally referred to through the different similar reference labels of view.Attached drawing is not necessarily pressed It is drawn according to ratio, but usually focuses on and illustrate in the principle of the present invention.In the following description, referring to the following drawings pair Each embodiment of the invention is described, in which:

Fig. 1 shows mobile radio communicaltions system；

Fig. 2 shows the various components and circuit of the mobile radio communication terminal equipment of Fig. 1；

Fig. 3 shows the flow chart of the method for the signal that processing receives；

Fig. 4 shows the multiple local reference signals drawn in frequency domain；

Fig. 5 shows the implementation of target center frequency selection；

Fig. 6 shows the processor for being designed to support cross-correlation calculation；

Fig. 7 shows the various components and circuit of the mobile radio communication terminal equipment of Fig. 1；

Fig. 8 shows the flow chart of the method for the signal that processing receives；

Fig. 9 shows the various components and circuit of the mobile radio communication terminal equipment of Fig. 1；

Figure 10 shows the flow chart of the method for the signal that processing receives；

Figure 11 shows the various components and circuit of the mobile radio communication terminal equipment of Fig. 1；

Figure 12 shows the flow chart of the method for the signal that processing receives；

Figure 13 shows the various components and circuit of the mobile radio communication terminal equipment of Fig. 1；

Specific embodiment

Following specific embodiments quote attached drawing, these attached drawings are shown the present invention by way of explanation and can be carried out In embodiment and detail.

Word " exemplary " is used to refer to " as example, example or explanation " herein.Herein as " exemplary " description Any embodiment or design should not necessarily be construed as relative to other embodiments or design be preferred or advantageous.

Word used in the deposition materials formed for " " side or surface "upper" " ... on " herein by with Come refer to deposition materials can be formed on the side or surface implied by " direct " (for example, directly with the side implied or Surface contact).Word used in the deposition materials formed for " " side or surface "upper" " ... on " herein may be used It can be formed on the side or surface implied by " indirect " with being used to refer to deposition materials, wherein one or more extra plays It is arranged between implied side or surface and deposition materials.

As it is used herein, " circuit ", which is construed as any kind of logic, realizes entity, operation can be It is stored in the special circuit or processor of the software in memory, firmware or any combination thereof.Connect firmly moreover, " circuit " can be Line logic circuit or such as programmable processor are (for example, microprocessor is (for example, Complex Instruction Set Computer (CISC) processor Or Reduced Instruction Set Computer (RISC) processor)) etc programmable logic circuit." circuit " can also be runs software (for example, any kind computer program (such as using such as Java etc virtual machine code computer program)) Processor.The implementation that will be made below any other type of corresponding function described in more detail is also construed as " circuit ".It is to be further understood that any two (or multiple) in described circuit can be incorporated into a circuit.

Shifting can be improved by using being estimated based on the method for cross-correlation function (CCF) possible carrier channel The frequency scanning of dynamic communication exports quality.Various aspects of the disclosure is due to that may increase the interference from other wireless signals Robustness is added, thus detection accuracy can be improved.

Similarly, the method based on cross-correlation can be provided for carrier wave polymerization processing to estimate possible carrier channel. Using supported based on the method for cross-correlation mobile radio cell scan many identical effects (for example, increase for The robustness of interference) it can also be implemented in the implementation with carrier wave polymerization processing.

Various aspects of the disclosure provides one or more postpositive disposal methods, via to can in mobile communications network The carrier channel of energy is effectively estimated to improve frequency scanning output (that is, at mobile radio cell scan or carrier wave polymerization The input of reason) quality.The estimation method can be provided to determine that candidate enhanced general mobile communication system (UMTS) is wireless The applicability of (E-UTRA) absolute RF channel number (EARFCN) is electrically accessed to be communicated with mobile communication equipment.For example, base Prediction and each phase can be used in the calculating of the cross-correlation to the wireless signal received and the reference signal being locally stored Possible communication quality in the associated carrier channel of the EARFCN answered.

Use the estimation of cross-correlation that can to make moderate progress in terms of selecting carrier channel appropriate.Obtain mobile communication The accurate characteristics of the quality of link may improve whole communication quality, because it allows mobile communication equipment to select higher possibility It is final that one or more carrier channels of highest communication level are provided.

Fig. 1 shows mobile radio communicaltions system.

Fig. 1 shows mobile radio communicaltions system 100.Mobile radio communication terminal equipment 102 is (for example, user sets Standby (UE) 102) via corresponding air interface 110,112 and 114 from one or more base stations (for example, NodeB or eNodeB 104,106 and multiple radio signals 108) are received.It should be noted that although others have been described as explaining and having used according to length Phase evolution (LTE) or the configuration of the mobile radio communicaltions system 100 according to senior long term evolution (LTE-A), but can provide Any other mobile radio communicaltions system 100, for example, any 3GPP (third generation cooperative partner program) mobile radio is logical Letter system (for example, according to Universal Mobile Communication System (UMTS)), 4GPP (forth generation partner program) mobile radio are logical Letter system etc..

When UE 102 is switched on, public land mobile network (PLMN) is searched for preempt.It is searched by the PLMN that UE 12 is implemented Rope may include frequency sweeping process and mobile radio cell scan process, this will be described in greater detail below. UE 102 can receive single or multiple radio signals (also referred to as radiofrequency signal (RF signal)).

Fig. 2 shows the various components and circuit of the UE 102 for providing and using in PLMN search process.Such as Fig. 2 institute Show, UE 102 includes one or more antenna 202, and UE 102 receives or sends RF signal via one or more antenna 202. One or more antenna 202 is shown as being coupled to RF transceiver 204, which can be configured to processing and receive Radio signal, the radio signal that receives of digitlization and the radio signal received after digitization is provided In memory 206.Memory 206 can be any one in various type of memory, for example, volatibility (RAM, DRAM, SRAM etc.) or it is non-volatile (ROM, hard drives, CD-ROM driver etc.).It is slow that memory 206 is also implemented as wideband data Rush device.RF transceiver 204 can be configured as example by providing digital signal modulated is analog rf signal to radio The transmission of signal.UE 102 can also include frequency scanning circuit 208 (being shown as being coupled to memory 206), frequency scanning Postpositive disposal circuit 210 (being shown as being coupled to frequency scanning circuit 208), PLMN search controller 212 (are shown as coupling In frequency scanning back-end circuit 210 and RF transceiver 204) and mobile radio cell scan circuit 214 (be shown as coupling In RF transceiver 204).These circuits may be implemented as independent circuit, for example, as independent integrated circuit.However, this In a little circuits some circuits or whole circuits (for example, frequency scanning circuit 208, frequency scanning postpositive disposal circuit 210, PLMN search controller 212, and/or mobile radio cell scan circuit 214) a common programmable processing can be passed through Device (for example, microprocessor) Lai Shixian.

When UE 102 is switched on, PLMN may search for preempt.For this purpose, PLMN search process is carried out, this will be under Text is further described in more detail.RF transceiver 204 receives radiofrequency signal via one or more antenna 202.RF transceiver 204 Demodulation digitlization and can be by signal (the also referred to as broadband number after demodulation and digitlization can be carried out to radiofrequency signal According to) (for example, being stored in wideband data buffer storage) is stored in memory 206.The band of the digitized signal buffered Wide and length possibly relies on the availability of on-chip memory.During PLMN search, UE 102 does not execute other operations usually. Therefore, most of on-chip memories (for example, HARQ memory) can be used for buffer digital signal.

Moreover, (for example, buffering) digitized signal that is stored can be used to implement frequency in frequency scanning circuit 208 Rate scan process.The search of the primary synchronization signal (PSS) based on time domain cross-correlation can be used in frequency scanning method.The width buffered Band digitized signal first passes around frequency spill spin block, which revolves the centre frequency of the digitized signal of input Turn.After frequency rotation, digitized signal is extracted (decimate) to determine narrow-band digital signal, wherein existing PSS and secondary synchronization signal (SSS) are positioned and are extracted.Effect using the frequency scanning method based on time domain cross-correlation is dual 's.First, the result from frequency scanning can be reused in the mobile radio cell scan stage, because PSS is detected It is had been carried out in the frequency scanning stage.Second, with other scan methods (for example, method based on RSSI or being based on auto-correlation Method) compare, sensibility may be much higher.

Fig. 3 shows the flow chart of method 300, and wherein method 300 is detailed for handling the digitized signal received Method.Method 300 can be the component by UE 102 (for example, frequency scanning circuit 208 and frequency scanning postpositive disposal circuit 210) the frequency scanning processing implemented.Can start carry out mobile radio cell scan before implementation method 300.

More specifically, method 300 can include determining that multiple cross-correlation coefficients (310) of the digitized signal received. For example, in 310, method 300 can be by locally joining the digitized signal received with corresponding candidate mobile radio It examines signal and carries out cross-correlation to determine each of multiple cross-correlation coefficients cross-correlation coefficient.Corresponding candidate's mobile radio Local reference signal can be a certain candidate mobile radio sheet in multiple candidate mobile radio local reference signals Ground reference signal.In addition, candidate mobile radio local reference signal used in 310 can also be pre-stored.For example, waiting Select mobile radio local reference signal that can indicate from base station broadcast, be intended for tissue or assist between UE 102 and base station Communication signal.Correspondingly, candidate mobile radio can be used in one of UE 102 and base station 104-108 shown in Fig. 1 Local reference signal carrys out organizing communication.Candidate mobile radio local reference signal can be used to estimate logical with certain base station The applicability of letter or for the synchronous communication with certain base station.As indicated above, candidate mobile radio is locally with reference to letter It number can be pre-stored, for example, can be placed in memory or be stored in buffer.UE 102 can move candidate Dynamic radio local reference signal is stored in memory or buffer.Candidate mobile radio local reference signal can also quilt It is stored in external position (for example, base station or other core screen components) and is provided to UE 102 in request.For example, UE 102 can request candidate mobile radio local reference signal from base station or other core components.This can reduce UE's 102 Internal storage demand.

As being previously described in detail, method 300 can include determining that multiple cross-correlation coefficients of the digitized signal received (310), each cross-correlation coefficient in plurality of cross-correlation coefficient can by by the digitized signal received with it is multiple Corresponding candidate mobile radio local reference signal in pre-stored candidate mobile radio local reference signal carries out mutual Correlation determines.Processor or similar processing circuit can be used to calculate the mutual of the digitized signal received in method 300 Related coefficient.For example, frequency scanning circuit 208 can determine cross-correlation coefficient in 310.Method 300 can be waited by estimation The cross-correlation between one of mobile radio local reference signal and the digitized signal that receives is selected to determine cross-correlation coefficient. It is local that cross-correlation coefficient can reflect specific one candidate mobile radio in the candidate mobile radio local reference signal of expression The measurement of similitude between reference signal and the digitized signal received.

Method 300 may include storing identified cross-correlation coefficient and other multiple cross-correlation coefficients calculated. Each cross-correlation coefficient in these cross-correlation coefficients can locally join with the candidate mobile radio used in its calculating It is associated to examine signal.For example, the system of operation processing 300 may include by time used in cross correlation value and cross-correlation calculation Mobile radio local reference signal is selected to carry out matched table.In this example, associated candidate mobile radio is locally joined Examining signal can be carried out by value identifiers (for example, index value of unique identification candidate's mobile radio local reference signal) Mark.Cross-correlation coefficient may also be included in that with the information that candidate mobile radio local reference signal is associated a certain In data structure, wherein the data structure includes both identifiers of cross-correlation and candidate mobile radio local reference signal. It alternatively, may include identifying corresponding candidate mobile radio local reference signal with the associated metadata of cross-correlation coefficient Information, vice versa.After each of multiple cross-correlation coefficients cross-correlation coefficient is determined, 320 may include choosing Select one or more cross-correlation coefficients in multiple cross-correlation coefficients.UE for example frequency of use can scan postpositive disposal circuit 210 implement 320.In illustrative aspect, method 300 can in 320 based on predefined measurement come from multiple cross correlations Certain cross-correlation coefficients are selected in number.For example, method 300 can select to meet from multiple cross-correlation coefficients predetermined in 320 The cross-correlation coefficient of adopted threshold value.In 320, method 300 can select one or more from identified multiple cross-correlation coefficients A maximum cross-correlation coefficient of value.These are worth maximum cross-correlation coefficient can be with the digitized signal that is found to be and receives Candidate mobile radio reference signal with highest similarity is associated.

After selecting one or more cross-correlation coefficients (320), method 300 can be in 330 based on selected mutual Related coefficient executes mobile radio cell scan.Method 320 can be logical to the mobile radio that UE 102 may be coupled to Communication network is identified.For example, method shown by flow chart 300 can make the load appropriate that can be initiated to mobile communication Wave channel is selected.The mobile radio cell scan circuit 214 of UE102 can execute mobile radio cell scan.

Mobile radio communication network can be long term evolution (LTE) network.For example, long-term evolving network can be it is advanced Long term evolution (LTE-A) network.

Pre-stored one or more of candidate mobile radio reference signal used in 310 can be multiple same Step sequence.For example, pre-stored one or more of candidate mobile radio reference signal can be multiple primary synchronization signals (PSS).PSS can wirelessly be sent from the base station of such as eNodeB etc to local UE.The PSS received can be used for together Base station and UE are walked (for example, the communication between one of base station 104-108 and UE 102).UE 102 can be in travel frequency scanning Use PSS.It should be noted that the use to PSS is not limited to this aspect, be alternatively used such as secondary synchronization sequences (SSS) or its Other synchronization signals of his broadcast singal etc.

In 320, method 300 can be by identifying one or more maximum values in identified multiple cross-correlation coefficients To select one or more cross-correlation coefficients.For example, processor or other processing circuits can estimate determined by it is multiple mutually Relationship number is to identify the maximum cross-correlation coefficient of one or more values.Such as frequency scan the group of postpositive disposal circuit 210 etc Part can execute the operation.Another illustrative aspect may include based on one or more selected cross-correlation coefficient select Carrier channel for mobile radio cell scan.For example, method 300 can from multiple predefined carrier channels (for example, One group of predefined load of absolute RF channel number (EARFCN) is wirelessly electrically accessed corresponding to enhanced general mobile communication system Wave channel) in select carrier channel.330 can be swept based on selected multiple candidate EARFCN to implement mobile radio cell It retouches.Be provided to implement mobile radio cell scan candidate EARFCN can with correspond to value maximum cross-correlation coefficient Candidate mobile radio local reference signal is corresponding.

According to predefined frequency scheme, in multiple pre-stored candidate mobile radio reference signals in 310 At least one can from multiple pre-stored candidate mobile radio reference signals another is different.For example, candidate move Dynamic radio reference signal can be in a predefined way and different from each other.In in illustrative aspect, candidate mobile radio ginseng Examining signal can respectively join from different frequency dependences.Correspondingly, different frequencies can be user-defined frequency scheme or A part of grid.

One or more of pre-stored candidate mobile radio local reference signal can reflect wireless access network The characteristic of carrier channel.For example, the frequency characteristic of one or more of multiple candidate's mobile radio local reference signals can To correspond to frequency associated with the predefined carrier channel of radio access network.Multiple pre-stored candidate mobile wireless One or more of electric local reference signal can be rotated in frequency according to predefined frequency scheme it is predefined Synchronizing sequence.

In conclusion the illustrative aspect of the disclosure may include pre-stored candidate mobile radio local reference signal One or more of correspond to wireless access network specific carriers channel the case where.For example, network can define nothing to be used for Line is electrically accessed the specific carriers channel of net, that is, carrier channel can be predefined.In exemplary L TE system, such carrier wave Channel can reside in 100kH_zOn carrier wave grid, i.e., carrier channel can be located at every 100kH on frequency axis_zPlace.Correspondingly, One or more of pre-stored candidate mobile radio local reference signal can correspond to LTE carrier channel.As above Described in illustrative aspect, one or more of pre-stored candidate mobile radio local reference signal be can be according to specific The predefined synchronizing sequence that carrier channel rotates in frequency.The available such as primary synchronization signal of the frequency rotation process it The synchronizing sequence of class is displaced to centered on the centre frequency of carrier channel from base band.In fact, the example of the disclosure Property aspect 310 calculating can be made to receive signal and multiple predefined synchronizing sequences between cross-correlation, wherein it is multiple Each of predefined synchronizing sequence is centered on the different corresponding centre frequencies of predefined carrier channel.

For example, available to the calculating of cross-correlation coefficient one measuring in 310, the digitlization which receives Similarity between signal and synchronizing sequence centered on predefined frequency.The measurement is in certain example mobile communication nets Be in network it is useful, in these illustrative mobile communications networks, it is known that synchronizing sequence in specific carrier frequency quilt Broadcast.For example, then UE can be executed and be searched if it is known that one group of predefined synchronizing sequence will be broadcasted in certain carrier frequencies Rope is to identify which carrier channel is most suitable for mobile communication based on the detection to synchronizing sequence.

Correspondingly, method 300 can be (multiple with reference to same by the digitized signal received and multiple reference synchronizing sequences Step sequence may be all based on single reference signal, and the centre frequency of the single reference signal can be by pre-rotation to obtain It is multiple to refer to synchronizing sequence) it is compared.In order to make up the fact that synchronizing sequence is broadcasted at predefined carrier channel, show Example property system can shift known synchronizing sequence according to predefined frequency scheme, to work as actual broadcast synchronization Sequence estimates that actual broadcast synchronization sequence will be when being sent wirelessly by given carrier channel.

Multiple pre-stored candidate mobile radio local reference signals can show phase when being drawn in a frequency domain Like degree.For example, a pair of pre-stored candidate mobile radio local reference signal can divide in frequency each other on the frequency axis Open distance identical with the candidate mobile radio local reference signal that another pair is pre-stored.In other words, two pairs of pre-stored times Mobile radio local reference signal is selected to may include by identical frequency distance f_sCome the mobile nothing of pre-stored candidate separated Line electricity local reference signal.In certain illustrative aspects, f_sCan for example about from 10kHz to 500kHz in the range of.Cause This, at least one difference between pre-stored candidate mobile radio local reference signal can correspond to multiple predefined Difference between the centre frequency of carrier channel.

In conclusion the carrier channel appropriate that selection is used for mobile communication can be used in terms of above example. The exemplary system of such as LTE network etc utilizes one group of predefined carrier channel.Therefore, with pass through all possible frequencies Carrier wave appropriate is different searching for, and the UE of searching carrier channel can only estimate known those carrier channels to be used.These Carrier channel can be identified as EARFCN in conventional LTE system.

It is contrasted with method 300, rssi measurement can use to the conventional analysis of possible carrier channel to execute, be somebody's turn to do Rssi measurement measures energy included in single carrier wave channel.However, this method vulnerable to from use other nothings Line is electrically accessed the influence of the interference of the communication of technology progress, thus the accuracy of this analysis is to be improved.

Correspondingly, method 300 may include the alternative by using channel quality analysis and be improved.It is disclosed Illustrative aspect cross correlation measurement can be used to estimate the synchronizing sequence received, to be fitted to possible carrier channel Conjunction property is analyzed.

It is as detailed previously, base station in exemplary system can by carrier channel to local UE wirelessly broadcast to A few signal comprising synchronizing sequence.Local UE can be used the synchronizing sequence received come tissue and base station movement it is logical Letter.The PSS each received will show the different degrees of destruction due to caused by noise and interference.In many cases, Channel quality is directly indicated with the grade of destruction caused by other inevitable interchannel noises due to interfering, that is, high makes an uproar Sound and disturbance level can indicate severe channel quality, and low noise and disturbance level can indicate the letter higher than average value Road quality.Therefore, strong candidate carrier channel can be used to identify to the quantitative analysis for destroying grade in the PSS received.

In conventional system, the synchronizing sequence of PSS in such as LTE network etc is predefined, thus initiating to lead to Believe that link is before known.It therefore, can be by the PSS received (its wireless biography in the carrier channel progress by giving Defeated period by noise and hinders and damage) it is compared with known PSS, to analyze the quality of given carrier channel.

Method 300 cross-correlation measurement can be used analyze it is known with reference to synchronizing sequence with the signal that receives (that is, connecing The synchronization signal received) between similarity, to obtain the quantitative instruction of channel quality.

However, conventional treatment will need to estimate at each possible frequency, to analyze each possible carrier wave letter Road frequency.For example, will need at whole candidate carrier channel frequencies by the signal received and whole candidate synchronization sequences into Row compares.Substantially, the synchronizing sequence at each possible carrier channel frequency is calculated needs, this may be needed significantly Processing power.

In order to minimize the process demand in such method, the illustrative aspect of the disclosure can be sent out in frequency scanning Candidate synchronization sequence is calculated before rising.These candidate synchronization sequences can be pre-stored and be taken when needing for calculating It returns, to reduce calculation amount required for each carrier channel is analyzed.

For example, synchronizing sequence can be represented asWherein, k corresponds to associated with predefined carrier channel Numeric identifier, and r corresponds to numeric identifier associated with certain types of synchronizing sequence.For example, k can correspond to The EARFCN of LTE system is it is assumed that and r can identify specific synchronizing sequence.Exemplary L TE system is for given carrier channel Three different primary synchronization signals (PSS) are provided, in this case, r is synchronous corresponding to (r=0), (r=1) or (r=2) Sequence.Conventional LTE system can also provide 692 possible EARFCN and assume, that is, k=1,2,3 ..., 692.

As detailed above, the illustrative aspect of the disclosure can be same for multiple predefined carrier frequency precomputations Step sequence.For example, illustrative aspect can calculate kr predefined synchronizing sequences, wherein each predefined synchronizing sequenceIndicate r=(0,1 or 2) one of synchronizing sequence centered on the centre frequency of the carrier channel identified by k.In the feelings In shape, each predefined synchronizing sequence is thus 2) r=(0,1 or has already passed through frequency displacement to make its center in synchronizing sequence The synchronizing sequence that the centre frequency that frequency and k-th of EARFCN assume matches.Therefore, each synchronizing sequence can be by table It is shown asWherein ω_f(k)It is frequency shift vector [1e^-2·π·f(k)…e^{-2π·(N-1)·f(k)}], and f (k) is The function of the k of phase jump as every sample.

Fig. 4 shows the example illustration of synchronizing sequence, as represented in the frequency domain on frequency axis 400, Mei Getong Step sequence corresponds to specific synchronizing sequenceNote that the frequency spectrum of each synchronizing sequence in Fig. 4 is exemplary, and It is not intended to the actual spectrum of the instruction such as synchronizing sequence of PSS vector etc.In contrast, the similar frequency spectrum of shape is intended to indicate Similar synchronizing sequence, for example, the frequency spectrum characterized by triangle is intended to obtain from substantially the same synchronizing sequence.In addition, Frequency axis 400 is not drawn to scale, and is not intended to be used as the accurate expression to the frequency interval along the axis.

For Fig. 4, predefined synchronizing sequence is can be used in the mobile communications network of such as LTE network etc.Such as The base station of eNodeB etc can wirelessly broadcast these predefined synchronizations in each carrier channel by the net definitions Sequence.Then local UE can use the synchronizing sequence received by specific carrier channel come tissue and assistant base station.Show Example property LTE system utilizes three different base band PSS vectors, these base band PSS vector frequency on the frequency axis of Fig. 4 400 Synchronizing sequence s is expressed as in domain_{PSS, 0}(412), synchronizing sequence s_{PSS, 1}(414) and synchronizing sequence s_{PSS, 2}(416).Sequence group Each synchronizing sequence 412-416 in 410 is located at baseband frequency, that is, it is rotated or shifted in frequency.Note that for Synchronizing sequence s_{PSS, 0}412、s_{PSS, 1}414 or s_{PSS, 2}Digital k is all not present (such as in each of 416 synchronizing sequencesIn that Sample) because k is only used for indicator sequenceIt is corresponding with which EARFCN hypothesis.Synchronizing sequence s_{PSS, 0}412、s_{PSS, 1}414 Hes s_{PSS, 2}416 be base band, and thus not by frequency displacement with corresponding with k-th of EARFCN hypothesis.However, each synchronizing sequence s_{PSS, 0}412、s_{PSS, 1}414 and s_{PSS, 2}416 have and are used to refer to r=(0,1 or 2) the corresponding r value of one of synchronizing sequence.LTE is carried Wave channel will use three PSS s_{PSS, r}One of, wherein r identifies specific PSS vector.

However, sequence group 420 indicates to assume the synchronizing sequence rotated in frequency according to k-th of EARFCN.For example, Sequence group 420 includes synchronizing sequence422、424 Hes426, each synchronizing sequence is according to (k=1) EARFCN assumes and is rotated.Correspondingly,422、424 HesEach of 426 on frequency axis 400 Frequency f₁=centfreq (EARFCN₁) centered on, wherein operation centfreq (EARFCN_x) generate x-th of EARFCN hypothesis Centre frequency.Thus frequency f₁=centfreq (EARFCN₁) correspond in the given EARFCN hypothesis defined by (k=1) Frequency of heart.It similarly, include synchronizing sequence432、434 Hes436 sequence group 430 is with frequency f₂= centfreq(EARFCN₂) centered on, because they are revolved in frequency according to the centre frequency that (k=2) EARFCN assumes Turn.

Each synchronizing sequence 422-426 and 432-436 thus indicates baseband synchronization sequence, baseband synchronization sequence basis Specific EARFCN hypothesis is rotated in frequency.As detailed above, synchronizing sequence 412-416 is revolved not yet in frequency Turn, thus be baseband synchronization sequence, that is, centered on about f=0.Correspondingly, each synchronizing sequence 422-426 and 432-436 Indicate that candidate synchronization sequence, these candidate synchronization sequences are carried out by base station by corresponding EARFCN carrier channel in which assume that Broadcast.It thus can be by one or more in the synchronizing sequence 422-426 and 432-436 of received synchronizing sequence and hypothesis It is a or be all compared, to determine which actual synchronization sequence with the candidate synchronization sequence of hypothesis is similar.By this ratio Difference more obtained can indicate the similarity etc. between the candidate synchronization sequence assumed and the synchronizing sequence being an actually-received Grade, correspondingly these differences can be used to the quality of estimation carrier channel.

Therefore, the high similarity (for example, high cross correlation value) between synchronizing sequence being an actually-received by performance The synchronizing sequence 422-426 or 432-436 of the hypothesis identified can indicate that home base stations pass through k-th of EARFCN and assume to come Broadcast strong radio signal.It is as detailed previously, it is assumed that candidate synchronization sequence with received by wireless carrier channel Higher cross correlation value between actual synchronization sequence can indicate the inferior grade in the carrier channel accordingly distributed noise and Interference.Correspondingly, if candidate synchronization sequenceHigh-grade cross-correlation is generated with the synchronizing sequence received, then with kth A EARFCN assumes that the carrier channel of association can be chosen to be the carrier channel that may expect for mobile communication.

Exemplary system can store multiple candidate mobile radio local reference signals, for example, multiple synchronizing sequencesFor example, exemplary system can store sequence group, it is each in sequence group EARFCN hypothesis possible for 692 A (that is, for k=1,2 ..., 691,692) includes three baseband synchronization sequences.Such exemplary system for example will include Similar to shown in Fig. 4 420 and 430 692 sequence groups, wherein each sequence group is with 692 on frequency axis 400 Centered on the centre frequency of one of EARFCN hypothesis.Multiple synchronizing sequences through rotating can correspondingly be used as multiple pre-stored Candidate mobile radio local reference signal, for example, as flow chart 200 220 be described in detail.

When receiving digital radio system, exemplary system can be by by the wireless signal received and multiple candidates One or more of mobile radio local reference signal or synchronizing sequence are compared to determine multiple cross-correlation coefficients. For example, processor or processing circuit can run cross-correlation function, to obtain correlator output Δ (k, r, n), wherein Δ (k, r, n) is calculated according to formula (1):

In formula (1), x is the vector for indicating the digitized signal received, and wherein x (n) is the n-th frame of x.Such as elder generation It is preceding be described in detail,It is the synchronizing sequence defined by k and r.Parameter V is used to the size of control optics coherence tomography window, and U It is the number for relevant optics coherence tomography window.For example, U can change from 1 to 4.For example, V can change from 32 to 128.

Correlator output Δ (k, r, n) can be the measurement for estimating possible carrier channel, for example, such as flow chart Cross-correlation measurement calculated in the 310 of 300.Illustrative aspect can attempt the applicability of k possible carrier channels of analysis, For example, for mobile radio cell scan (the 330 of flow chart 300) or carrier wave polymerization processing (referring to the 730 of flow chart 700) In applicability.Each carrier channel in k carrier channel can be corresponding with a certain EARFCN in LTE communication network. Exemplary L TE system can provide fixed number r possible synchronizing sequences.Such system can be in k carrier channel Each carrier channel on using each of r possible synchronizing sequence, so that overall provide kr possible synchronizations Combination, that is, each of r sequence is at each of k possible carrier channel frequencies place.

Correspondingly, correlator output Δ (k, r, n) indicates the digitized signal x (n) received and kr possible time Select mobile radio local reference signalOne of between correlation.Each candidate's mobile radio local reference signal It can be pre-stored.Each candidate's mobile radio local reference signal can be according to the carrier wave letter in mobile communications network The centre frequency in road and the primary synchronization signal rotated in frequency.Therefore, the digitized signal received may with kr One of candidate mobile radio local reference signal between the output of high correlator can indicate that corresponding k-th of EARFCN can To provide high-grade mobile communication.Then exemplary system can choose one or more in identified cross-correlator output It is a to select carrier channel, to attempt for wirelessly communicating.As detailed above, such exemplary system, which can choose, to be made It one or more cross-correlation output factors for being calculated with one of kr candidate mobile radio local reference signal and marks Corresponding k-th of carrier channel is known for mobile radio cell scan.Frequency scanning postpositive disposal circuit 210 can be Implement the selection to cross-correlation coefficient in 320.

Illustrative aspect can locally be joined by being pre-stored each candidate mobile radio before starting cross-correlation calculation Signal is examined to reduce process demand.Illustrative aspect candidate mobile radio required for can fetching on demand is locally with reference to letter Number.Such illustrative aspect can be by calculate candidate mobile radio local with for each required cross-correlation operation The opposite mode of reference signal is pre-stored candidate mobile radio local reference signal to reduce processing power demand.

Utilize the available further improvement of certain characteristics of candidate mobile radio local reference signal.For example, method 310 in 300 can be used one or more medians to determine the first cross-correlation coefficient.Phase thus can be used in method 300 With one or more medians determine the second cross-correlation coefficient.Processing function can be saved using median in multiple calculating Rate, since it is desired that less overall calculation.

In illustrative aspect, at least one median can reflect at least two candidate mobile radio local reference signals Between predefined relationship.For example, at least two candidate mobile radio local reference signals can be mutual complex conjugate.Show This relationship be can use in terms of example property to calculate again using identical value used in a cross-correlation coefficient is calculated Different cross-correlation coefficients.

As detailed previously, it is main same that another illustrative aspect, which can provide candidate mobile radio local reference signal, It walks signal (PSS), for example, PSS vector used in LTE communication network.

Such as defined in 3GPP, PSS vector s_{PSS, 2}(that is, the base band PSS vector defined by r=2) is PSS vector s_{PSS, 1}Complex conjugate, that is, s_{PSS, 1}=conj (s_{PSS, 2}).Therefore, exemplary system can use the predefined relationship and come again Utilize intermediate result.If the following condition in definition in formula (2) is set up, intermediate result can be used again:

In formula (2), k and l identify corresponding k-th and first of EARFCN respectively and assume.Similarly, 1 and 2 instruction (r=1) and (r=2) PSS vector.

Therefore, illustrative aspect, which can provide, assumes two EARFCNWith(wherein,It is Complex conjugate) selection, the digitized signal received and at least one mobile nothing of candidate are determined using median again Cross-correlation coefficient between line electricity local reference signal.

Illustrative aspect can handle the digitized signal received based on target center frequency, and can be correspondingly Multiple cross-correlation coefficients are determined based on the processed digitized signal received.For example, illustrative aspect can be based on extremely Few two characteristic signals frequencies carry out selection target centre frequency, wherein each characteristic signals frequency and at least two candidate mobile nothings One of line electricity local reference signal is associated.Target center frequency can be the midpoint between at least two characteristic signals frequencies.

In other words, exemplary system can be by handling the digitized signal received and in calculating cross-correlation coefficient Using the corresponding processed digitized signal received come in so that can be utilized in being determined to cross-correlation coefficient Between be worth.In order to meet above-mentioned relationExemplary system may need to be based on synchronizing sequenceWithFrequency characteristic select centre frequency appropriate to handle the digitized signal received inputted.

As being described in detail in Fig. 3, method 300 can be provided for the digitized signal received to multiple mutual in 310 The determination of related coefficient.For example, 310 can be by locally joining the digitized signal received and multiple candidate mobile radios Examine at least one of signal (for example, byAt least one of kr PSS vector of definition) carry out cross-correlation Determine multiple cross-correlation coefficients.

Fig. 5, which shows in determining multiple cross-correlation coefficients (for example, in 310 of flow chart 300), can be used median Illustrative aspect.As drawn in frequency grid 500, Fig. 5 shows four PSS vectorsWithCentre frequency 520-526.The centre frequency 520-526 of each PSS vector It can be corresponding with the centre frequency that specific EARFCN assumes.Centre frequency 520-526 can be it is equally distributed, such as with 100kHz shown in Fig. 5 is uniformly distributed.This frequency interval is carried with LTE equally distributed in the frequency grid of m*100kHz Wave channel is corresponding, this is universal in conventional LTE system.As detailed previously, 3GPP provides base band PSS vector s_{PSS, 2}And s_{PSS, 1}It is mutual complex conjugate.However, PSS vectorWithAssumed according to k-th of EARFCN in frequency On rotated.Therefore, when PSS is shifted in frequency, may lost at baseband frequency existing for it is complex conjugate Relationship.

Illustrative aspect can re-establish two PSS vectorsWithBetween complex conjugate, will pass through Select to handle the digitized signal received the frequency appropriate utilized before cross-correlation calculation in cross-correlation Median is utilized in calculating.

For example, exemplary system can be attempted to determine that the digitized signal received and candidate mobile radio locally refer to SignalWithCross correlation between (for example, as shown in Figure 5 with the PSS of centre frequency 522 and 524) Number.Correspondingly, illustrative aspect can choose target center frequency used in the digitized signal that processing receives.The target Centre frequency can be by analyzing candidate mobile radio local reference signalWithCharacteristic selected, example Such as, corresponding centre frequency 522 and 524.Exemplary system can use the processed digitlization received as a result Signal determines multiple cross-correlation coefficients (for example, 310 in flow chart 300).Reusing median in multiple calculating can To reduce processing power demand.For example, illustrative aspect can choose the target that the digitized signal that processing receives is utilized Centre frequency is candidate mobile radio local reference signal in frequency grid 500WithCentre frequency 522 with Midpoint between 524.The operation can re-establish the postrotational candidate mobile radio local reference signal of frequencyWithBetween complex conjugate relationship.Correspondingly, 310 in method 300 can reuse in determining multiple cross-correlation coefficients Median.

Correspondingly, illustrative aspect can also be related to using same midpoint 510 with 520 He of respective center frequency 526 candidate mobile radio local reference signalWithCross-correlation calculation in use median.Candidate moves Dynamic radio local reference signal can be for example uniformly distributed on frequency grid (for example, frequency networks 500) with every 100kHz. Correspondingly, midpoint 510, which is also represented by, corresponds toWithCentre frequency 520 and 526 between frequency midpoint.Show Example property in terms of thus can also be calculated using medianWithWith before the digitized signal that receives Cross-correlation coefficient, wherein the digitized signal received is processed according to midpoint 510.

As being described in detail in Fig. 5, midpoint 510 is located at a possible position in m*100+50kHz frequency grid, that is, Positioned at the frequency midpoint of a pair of of centre frequency 522 and 524, this is equally distributed m*100kHz frequency to centre frequency 522 and 524 A part of rate grid.Other centre frequency positions at midpoint 510 are also possible.For example, midpoint 510 is set in which can replace It is at a certain position in m*100kHz frequency grid (for example, at centre frequency 524) and thus with centre frequency 524 The EARFCN Channel Sharing centre frequency at center.Correspondingly, illustrative aspect median method can be used calculate with it is adjacent The associated candidate mobile radio local reference signal of EARFCN channel 526 and 522 is mutual with the digitized signal that receives Correlation, wherein adjacent EARFCN channel 526 and 522 is located at f_k+1=EARFCN_k+ 100kHz=EARFCN_k+1And f_l= EARFCN_k- 100kHz=EARFCN_lPlace.However, this method may be suboptimum because centered on centre frequency 524, now The shared synchronizing sequence as the same centre frequency at midpoint 510 will not be pairs of with another synchronizing sequence.In this case may be used Median can be reused, because there will be no the corresponding candidate mobile radios for meeting complex conjugate requirement locally to refer to Signal.

It will determine that example calculation used in cross-correlation coefficient is described to can use median now.

In in illustrative aspect, two vectors with V element can be according to definition of such as getting off:

R (n, u)=[(r (n-uV) ... r (n- (u+1) V+1)]

Inner product in formula (2) can be expressed as

Assume that formula (2) then can be substituted into formula (4) to (k, l) for EARFCN as defined above.Accordingly Ground, for (r=1,2)Calculating can utilize again completelyAndValue.Specifically, below existing relationship is shown in formula (5).

As shown in formula (5) above,AndValue can by with In rightWithCalculating in.It can be reduced by reusing median in this way to a certain for testing The calculating requirement that EARFCN assumes.It is certain exemplary when compared with " brute-force " method for not reusing any median Aspect can about reduce by 30% calculating requirement.The brute force method may need to calculate for 6 times, and exemplary side illustrated above Method only needs 4 calculating.

Illustrative aspect can realize the calculating based on median in different ways.For example, some aspects can be Median is calculated before being determined to cross-correlation coefficient and it is then successively updated to one of above-mentioned formula.Alternatively, Illustrative aspect can determine median in the treatment process for determining a cross-correlation coefficient.Median then can be later To being used again in the calculating of another cross-correlation coefficient.

Fig. 6 shows the exemplary correlator unit 600 being described below.Correlator unit 600 may be implemented It is determined based on the cross-correlation of median.

In fig. 6 it is shown that correlator unit 600.Correlator unit 600 may include duplexer array 630, correlator Kernel array 640 and literal register 620-627.Correlator unit 600 can receive received digitized signal r (n) imaginary part 612 of real part 610 and received digitized signal r (n) is both as input.Received digitlization Signal r (n) may be previously processed according to such as target center frequency above with reference to described in Fig. 5, thus meet with The related requirement of formula (2).Duplexer array 630 and correlator kernel array 640 can handle real part 610 and imaginary part 612 2 Person is with the multiple cross-correlation coefficients of determination.Method 300 can use the correlator list of such as correlator unit 600 etc in 310 Member determines multiple cross-correlation coefficients.

Correlator unit 600 can also reduce calculating and require.For example, correlator unit 600 can make in relevant calculation With low bit precision.2.5 bits can be used to execute calculating in correlator unit 600, that is, utilize possible values (- 2, -1,0,1 With 2).The all possible multiplication value as needed for calculating, which can shift to an earlier date, to be calculated and can simply be selected when needed For using, therefore low bit precision implementation can provide advantage in terms of calculating requirement.For example, literal register 620- 627 can retain all possible bit value, these bit values have been pre-calculated before starting cross-correlation calculation.Accordingly Ground, one of N number of correlator kernel in correlator kernel array 640 may need to be stored in literal register 620-627 it Value in one, to calculate specific cross-correlation coefficient.Then duplexer array 630 can be fitted from literal register 620-627 When one in select required input, and the value is fed into corresponding correlator kernel.Then correlator kernel makes Implement to calculate with value obtained.

Such illustrative aspect can also reduce calculating and require.For example, multiplication calculating may be single to processor or processing Member has wilderness demand, to need vast resources for duplicate calculating.All systems as shown in Figure 6 etc it is exemplary System can calculate all possible multiplication output valve in advance and is fed into computation module appropriate when needed.Phase Ying Di, can be by replacing multiplying to reduce processing requirement with multiplexer selection.

Correspondingly, illustrative aspect shown in Fig. 6 is for each correlator kernel drop in correlator kernel array 640 The low needs for executing multiplication.In addition to reducing processing requirement, it can also be correspondingly made available the hardware cost of reduction, because of correlator Each correlator in kernel array 640 does not need dedicated multiplication unit.It should be noted that with exemplary side shown in Fig. 6 Many other arrangements are possible as noodles.In addition, the implementation of 2.5 bits of use illustrated can be by different ratios Bit scheme replaces, and any number of compares special formula because may be realized by system designer based on its respective demand and preference Case.

In illustrative aspect, each correlator kernel in N number of correlator kernel in correlator kernel array 640 can be with Determine the cross correlation value of given EARFCN hypothesis pair.As detailed previously, each correlation in correlator kernel array 640 Device kernel can calculate the cross-correlation between the digital input signal and synchronizing sequence received, and wherein the synchronizing sequence exists It is shifted to match its centre frequency and the predefined EARFCN centre frequency assumed in frequency.In addition, correlator Unit 600 can calculate the cross-correlation coefficient of certain synchronizing sequences pair using median again.In correlator kernel array 640 Each correlator kernel can thus be used to calculate the value that given EARFCN assumes pair.

To allow to false with a large amount of EARFCN in the correlator kernel array 640 that additional correlator kernel can be added If relevant value is calculated simultaneously.In other words, adding additional correlator kernel can permit while to many cross correlations Number carries out parallel processing.For example, Fig. 6 currently shows the correlator kernel array including N number of correlator kernel, generate N number of mutual Related coefficient 650.However, it is possible to increase the number of correlator kernel, for example, being doubled to 2N.The modified structure is by phase Generate 2N cross-correlation coefficient 650 with answering, i.e., each correlator kernel in correlator kernel array 640 generates a cross-correlation Coefficient.The implementation of the parallel processing can produce increased processing handling capacity.However, volume in correlator kernel array 640 The addition of outer correlator kernel may need additional hardware component, this transfers that hardware cost can be can increase.However, certain show Example property implementation may each additional correlator kernel be needed less than 10⁴Additional logic gate.In certain implementations In the figure may be relatively small, for example, needing 10 for component necessary to other⁶The implementation of a or more logic gate In.Therefore, system designer can choose including additional door to reduce the overall calculation time, to provide to relevant network The potential advantages of agreement more rapidly executed.

As detailed previously, such as method 300 can be embodied as frequency sweeping process by the equipment of UE 102 etc A part.Frequency scanning circuit 208 and frequency scanning postpositive disposal circuit 210 can be with operation methods 300.Frequency scanning circuit 208 may be implemented as the circuit or component of UE 102 as shown in Figure 2 with frequency scanning postpositive disposal.

Correspondingly, the illustrative aspect of the disclosure may include that the mobile radio communication terminal of such as UE 102 etc is set Standby, which may include the electricity that at least one is configured as the digitized signal that processing receives Road, for example, frequency scanning circuit 208 and frequency scanning postpositive disposal circuit 210.UE 102 can receive nothing by antenna 202 Line radio signal, the radio signal can then be handled by RF transceiver 204.RF transceiver 204 can be from antenna 202 receive the wireless signal received being digitized, and can provide it to memory 206.The digitlization received Signal can be stored in memory 206 and be returned and be taken so that future processing is (for example, by frequency scanning circuit 208 Reason).The digitized signal received can alternatively be provided directly to frequency scanning circuit 208 for handling.Frequency is swept Scanning circuit 208 can handle the digitlization received by determining multiple cross-correlation coefficients of the digitized signal received to be believed Number, each cross-correlation coefficient in plurality of cross-correlation coefficient can be by prestoring the digitized signal received with multiple It is next to carry out cross-correlation for corresponding candidate's mobile radio local reference signal in the candidate mobile radio local reference signal of storage It determines.As detailed previously, multiple cross-correlation coefficients can be used to quantify the digitized signal received and more in UE 102 Similarity between at least one of a pre-stored candidate mobile radio local reference signal.Pre-stored candidate is mobile Radio local reference signal can be stored in other storage equipment of memory or such as buffer etc.For example, Pre-stored candidate mobile radio local reference signal can be stored in internal storage by UE102.Alternatively, candidate to move Dynamic radio local reference signal can be stored in external position, and be fetched when needed by UE 102.UE 102 can be incited somebody to action Pre-stored candidate mobile radio local reference signal is stored in memory 206 with the digitized signal received, or It can store in private memory independent on UE 102.After determining multiple cross-correlation coefficients, frequency scan at postposition Reason circuit 210 can select one or more cross-correlation coefficients from identified multiple cross-correlation coefficients.As detailed above , frequency scanning postpositive disposal circuit can be selected from identified multiple cross-correlation coefficients mutually based on predefined standard Relationship number.Maximum value can be used as predefined standard by illustrative aspect, in this case, frequency scan postpositive disposal circuit 210 can select at least one or more cross-correlation coefficient with maximum value from identified multiple cross-correlation coefficients.

Various other components of UE 102 can use the information represented by selected cross-correlation coefficient execute with The related further processing of mobile communication.For example, mobile radio cell scan circuit 214 can institute based on one or more The cross-correlation coefficient of selection executes mobile radio cell scan, is thus connected to mobile radio communication network.For example, moving Dynamic radio plot scanning circuit 214 can identify the carrier wave for being possibly used for mobile communication based on selected cross-correlation coefficient Channel.UE 102 can be used one or more carrier channels identified and carry out future communications by radio access network.

Such as the mobile radio communication apparatus of UE 102 etc can be run on mobile radio communication network.Example Such as, UE 102 can be run on an LTE network.UE 102 can be run in LTE-A network.

It is as detailed previously, frequency scanning circuit 208 in UE 102 can based on the digitized signal received with Comparison between at least one of multiple pre-stored candidate mobile radio local reference signals determines multiple cross-correlation Each cross-correlation coefficient in coefficient.Multiple pre-stored one or more of candidate mobile radio local reference signals can To be multiple synchronizing sequences.For example, one or more of multiple synchronizing sequences can be multiple PSS.Alternatively, multiple synchronizations One or more of sequence can be multiple SSS.Therefore frequency scanning circuit 208 can calculate the digitized signal received With the cross correlation value between pre-stored synchronizing sequence.Frequency scan postpositive disposal circuit 210 can from it is identified it is multiple mutually One or more cross-correlation coefficients are selected in related coefficient.Frequency scanning postpositive disposal circuit 210 can be configured as based on pre- The standard of definition selects selected cross-correlation coefficient.Frequency scanning postpositive disposal circuit 210 can be determined by mark Multiple cross-correlation coefficients in one or more maximum values select one or more cross-correlation coefficients.Correspondingly, 102 UE The carrier channel for mobile radio cell scan can be selected by selected cross-correlation coefficient based on one or more.Example Such as, UE 102 can execute mobile radio cell scan based on the information obtained via cross correlation value determination and selection. Mobile radio cell scan may be implemented in one or more circuits or processing unit on UE 102.For example, mobile radio Cell scan circuit 214 can run mobile radio cell scan.Mobile radio cell scan circuit 214 can be used one A or multiple carrier channels execute mobile radio cell scan, and wherein the one or more carrier channel uses as described above Selected cross-correlation coefficient is identified.

Frequency scanning postpositive disposal circuit 210 can select one or more carrier waves from multiple predefined carrier channels Channel, that is, one group of possible carrier channel can be defined before starting various processing.In multiple predefined carrier channels One or more can be corresponding with for the EARFCN in LTE communication network.For example, one or more carrier channels can be with Corresponding EARFCN Sharing Center frequency.The multiple carrier channels that can be selected can be the complete of all possible EARFCN Set or subset.Correspondingly, one group of EARFCN can be used to select the carrier channel for mobile communication in UE 102.

Multiple pre-stored one or more of candidate mobile radio local reference signals can reflect radio and connect The characteristic of the carrier channel of networking.For example, one or more in multiple pre-stored candidate mobile radio local reference signals A frequency characteristic can correspond to frequency associated with the predefined carrier wave of radio access network.More specifically, prestoring One or more of candidate mobile radio local reference signal of storage can be according to predefined frequency scheme in frequency Upper postrotational scheduled synchronizing sequence.

For example, frequency scanning circuit 208 can be by by the digitized signal received and one or more pre-stored Candidate mobile radio local reference signal carries out cross-correlation to determine each cross-correlation coefficient in multiple cross-correlation coefficients.This Each of pre-stored candidate mobile radio local reference signal can be to for possible in radio access network a bit Carrier channel.Possible carrier channel can be defined by frequency scheme (for example, one group of EARFCN).For example, each prestoring The candidate mobile radio local reference signal of storage can correspond directly to an EARFCN, and according to each pre-stored time The difference between corresponding EARFCN for selecting mobile radio local reference signal to be based on, correspondingly one or more is pre-stored Candidate mobile radio local reference signal can be different from another pre-stored candidate mobile radio local reference signal.

Correspondingly, according to predefined frequency scheme, in multiple pre-stored candidate mobile radio local reference signals At least one can be different from another in multiple pre-stored candidate mobile radio local reference signals.

At possible advantageous aspect, each pre-stored candidate mobile radio local reference signal be can be in frequency On by frequency " displacement " or the predefined synchronizing sequence of " rotation ".Each predefined synchronizing sequence can be according to predefined Frequency scheme is shifted in frequency, for example, the frequency scheme assumed based on the EARFCN being such as described in detail above for Fig. 4.

According to predefined frequency scheme, each pre-stored candidate mobile radio local reference signal can each other not Together.What the frequency values that the pre-stored candidate mobile radio local reference signal of a pair differs each other may be pre-stored with another pair Difference between candidate mobile radio local reference signal is identical.Frequency values in this illustrative aspect can for example be located In in the range of about 10kHz to 500kHz.Difference between pre-stored candidate mobile radio local reference signal can The difference between centre frequency additionally to correspond to multiple predefined carrier channels.For example, each pre-stored candidate shifting Centered on the centre frequency for the carrier channel that dynamic radio local reference signal can give, such as described in Figure 4.

In certain illustrative aspects, each pre-stored candidate mobile radio local reference signal can be evenly distributed In in frequency grid.For example, each the centre frequency of pre-stored candidate mobile radio local reference signal can be in frequency It is equally spaced from each other on axis.

Frequency scanning circuit 208 can be additionally configured to utilize median in determining multiple cross-correlation coefficients.For example, frequency One or more medians can be used to determine the first cross-correlation coefficient in rate scanning circuit 208, and utilize identical centre One or more of value determines the second cross-correlation coefficient.It is local that median can reflect at least two candidate mobile radios Predefined relationship between reference signal.At least two candidate mobile radio local reference signals can be mutual multiple total Yoke.In addition, candidate mobile radio local reference signal can be PSS.As detailed above, as used in LTE network Certain PSS are defined as showing complex conjugate relationship.

The example implementations of the frequency scanning circuit 208 determined using the cross correlation value based on median can basis Target center frequency handles the digitized signal received, and correspondingly can be based on the processed digitlization received Signal determines multiple cross-correlation coefficients.Frequency scanning circuit can be configured as based at least two characteristic signals frequencies and select Select target center frequency, wherein each characteristic signals frequency can also be at least two candidate mobile radios locally with reference to letter Number one of it is associated.As detailed previously, as selected by frequency scanning circuit 208 and the target center frequency that uses can be by It is chosen to be the midpoint between at least two characteristic signals frequencies, as shown in Figure 5.

Fig. 7 shows the frequency scanning circuit 700 based on CCF.The frequency scanning circuit 208 of UE 102 can use similar Internal structure realize that but the present disclosure is not limited to this aspect.

Frequency scanning circuit 700 shown in fig. 7 based on CCF includes frequency spill spin block 710, extracts and normalize block 720 and correlator group 730.Frequency scanning circuit 700 based on CCF receives wideband data input 702.Such as RF transceiver 204 etc receiver parts can provide wideband data input 702.Alternatively, such as the memory of memory 206 etc or Buffer can provide wideband data input 702.Wideband data input 702 can be received after being sent by base station radio, The base station for example can be one of base station 104-108.Wideband data input 702 may include UE (for example, UE 102) and intend to use In the synchronizing sequence of tissue mobile communication.For example, wideband data input 702 may include one or more PSS vectors, this Or multiple PSS are broadcasted at dedicated carrier frequency by specific carrier channel.Wideband data input 702 may include to A few synchronizing sequenceAs being described in detail for Fig. 4.Correspondingly, the synchronizing sequence for being included can be with f_k= centfreq(EARFCN_k) centered on synchronizing sequenceIn addition, including the synchronizing sequence in wideband data input 702It may be destroyed by noise and interference sections during wireless transmission.Frequency scanning circuit 700 based on CCF can To handle wideband data input 702 to extract included synchronizing sequence and by itself and pre-stored candidate mobile radio sheet Ground reference signal is compared.

Correspondingly, wideband data input 702 can be provided to frequency spill spin block 710.As shown in fig. 7, frequency spill spin block 710 can be coupled to extraction and normalization block 720.Frequency spill spin block 710 and extraction and normalization block 720 can handle broadband Data input 702 is to extract any existing synchronizing sequence.For example, frequency spill spin block 710 can rotate width according to target frequency Band data input 702.Postrotational data-signal 704 may be subsequently fed extraction and normalization block 720.Extraction and normalizing Changing block 720 can be configured as to postrotational signal execution extraction process, to obtain included in wideband data input 702 Synchronizing sequence.For example, postrotational data-signal 704 can be extracted by extracting and normalize block 720.Extract and normalize block 720 Postrotational data-signal 704 can also be normalized with obtain wideband data input 702 at the target frequency existing for synchronous sequence Column.It extracts and then extracted synchronizing sequence 706 can be supplied to correlator group 730 by normalization block 720.

Extracted synchronizing sequence 706 can be based on the input signal significant changes received.For example, wideband data inputs 702 are likely not to have received at target frequency to any significant data, that is, there is no believe target frequency as its carrier wave Any related transmitter that road is broadcasted.Correspondingly, extracted synchronizing sequence 706 substantially can be noise.Alternatively, The transmitter of such as base station etc can broadcast the substantially muting strong signal comprising synchronizing sequence by target frequency.? In the example scenario, extracted synchronizing sequence 706 be can be comprising the effect seldom noise and caused by interfering Synchronizing sequenceIncluded in noise and interference volume can depend on the matter of the carrier channel at target frequency Amount, thereforeIn noise and interference volume can quantify the channel quality of carrier channel.

As shown in fig. 7, extracted synchronizing sequence 706 can be provided to correlator group 730.Correlator group 730 is subsequent Extracted synchronizing sequence 706 and the one or more in multiple candidate mobile radio local reference signals can be compared Compared with.As detailed previously, one or more of multiple candidate's mobile radio local reference signals can be pre-stored, I.e., it is possible to be calculated and stored in memory or buffer.One in multiple candidate's mobile radio local reference signals Or it is multiple can be synchronizing sequence, for example, PSS.Correspondingly, correlator group 730 can be by extracted synchronizing sequence 706 and one A or multiple synchronizing sequences are compared to obtain one or more cross-correlation coefficients.As detailed previously, these cross-correlation Coefficient can reflect the similarity between extracted synchronizing sequence 706 and corresponding pre-stored synchronizing sequence.The disclosure Illustrative aspect can use cross-correlation coefficient calculated to estimate the quality of possible carrier channel.In addition it is possible to use Correlator group 730 is realized similar to the correlator unit of correlator 600.

Correlator group 730 can be configured as output cross-correlation coefficient 708 calculated.Cross-correlation coefficient calculated 708 can be then by another block analysis.Alternatively, correlator group 730 can execute internal analysis and export analysis result.

As detailed previously, frequency scanning circuit 208 may be implemented as the frequency scanning circuit 700 based on CCF.Phase Ying Di, the frequency scanning circuit 700 based on CCF can be provided to the frequency scanning postpositive disposal circuit 210 of UE 102 and be calculated Cross-correlation coefficient 708.Frequency scanning postpositive disposal circuit 210 may then based on the cross-correlation provided by correlator group 730 Coefficient 708 selects cross-correlation coefficient.

Fig. 8 shows the flow chart 800 that the method for handling the digitized signal received is described in detail.With flow chart 300 Shown in method compare, the method for flow chart 800 is detailed using the digitized signal that receives and multiple pre-stored times The cross-correlation coefficient between mobile radio local reference signal is selected to support carrier wave polymerization to handle.In illustrative aspect, method 800 may be implemented as the frequency scanning processing implemented by frequency scanning circuit 208 and frequency scanning postpositive disposal circuit 210.

Similar to method 300, method 800 can include determining that multiple cross-correlation coefficients of the digitized signal received (810).Method 800 can be configured as by by the digitized signal received and multiple pre-stored candidate mobile radios Corresponding candidate's mobile radio local reference signal carries out cross-correlation to determine multiple cross-correlation coefficients in local reference signal Each of.

820 may include that one or more cross-correlation coefficients are selected from identified multiple cross-correlation coefficients.Method 800 One or more cross-correlation coefficients can be selected based on predefined standard (for example, maximum value) in 820.

Compared with including to execute the flow chart 300 of mobile radio cell scan, method 800 may include based on one or Multiple selected cross-correlation coefficients handle (830) to execute carrier wave polymerization.For example, with using selected cross-correlation coefficient come The carrier channel that mark is possibly used for executing cell scan is different, and 830 can come instead by selected cross-correlation coefficient The carrier channel that may be used in mark carrier wave polymerization.Carrier wave polymerization process can be used in LTE-A network makes to be directed to single UE With multiple carrier channels, to increase bandwidth significantly.810 and 820 selected cross-correlation thus can be used in method 800 Coefficient polymerize to identify candidate carrier channel to be used for carrier wave.

Correspondingly, method 800 may be implemented as LTE system (for example, the lte-a system that can execute carrier wave polymerization) A part.

One or more of multiple pre-stored candidate mobile radio local reference signals used in 810 can be with It is multiple synchronizing sequences.Another illustrative aspect may include that one or more of plurality of synchronizing sequence is multiple PSS The case where.

It can be maximum by identifying the one or more in identified multiple cross-correlation coefficients similar to method 300,820 Value selects cross-correlation coefficient.Method 800 can choose one or more cross-correlation coefficients with maximum value, that is, table Show the cross-correlation coefficient of the highest degree of correlation.

830 may include based on one or more selected cross-correlation coefficient come execute carrier wave polymerization processing.Specifically, 830 can based on one or more selected cross-correlation coefficient come select for carrier wave polymerize processing carrier channel.830 can To select carrier channel from multiple predefined carrier channels.Similar in the illustrative aspect of flow chart 300 for moving The carrier channel mark of radio plot scanning, one or more of multiple predefined carrier channels can correspond to EARFCN。

One or more of multiple pre-stored candidate mobile radio local reference signals used in 810 can be with Reflect the characteristic of the carrier channel of radio access network.Specifically, multiple pre-stored candidate mobile radios are locally with reference to letter Number one or more of frequency characteristic can correspond to it is associated with the predefined carrier channel of radio access network Frequency.According to predefined frequency scheme, multiple pre-stored at least one of candidate mobile radio local reference signals It can be different from another in multiple pre-stored candidate mobile radio local reference signals.According to predefined frequency side Case, one or more of pre-stored candidate mobile radio local reference signal can be rotated in frequency it is predetermined The synchronizing sequence of justice.As being described in detail about Fig. 4, one or more in pre-stored candidate mobile radio local reference signal A synchronizing sequence that can be such as PSS etc, the synchronizing sequence are moved in frequency according to the centre frequency of EARFCN Position.Correspondingly, method 800 can be by each of these pre-stored candidate mobile radio local reference signals and reception To digitized signal be compared to estimate to broadcast the carrier channel of strong wireless signal.Generate the pre-stored of high cross correlation value Candidate mobile radio local reference signal can be indicated in the candidate mobile radio local reference signal phase pre-stored with this The strong cell broadcasted in associated carrier frequency, and the pre-stored candidate mobile radio for generating low cross correlation value is local Reference signal can be indicated in the faint of associated carrier frequency or the communication channel being not present.

Multiple pre-stored at least some of candidate mobile radio local reference signals can on the frequency axis each other It is spacedly distributed.For example, a pair of pre-stored candidate mobile radio local reference signal can be separated from each other on the frequency axis Distance and another pair it is pre-stored candidate mobile radio local reference signal it is identical (that is, separating identical frequency values).Frequently Separation distance on rate axis can be in the range of for example from about 10kHz to about 500kHz.

As disclosed previously, in the difference used in 810 between candidate mobile radio local reference signal At least one can correspond to the difference between the centre frequency of multiple predefined carrier channels.For example, be each pre-stored Candidate mobile radio local reference signal can be located on frequency axis according to corresponding predefined EARFCN centre frequency. On the frequency axis the distance between pre-stored candidate mobile radio local reference signal then by by with it is each pre-stored The centre frequency of the related EARFCN of candidate mobile radio local reference signal defines.

Method 800 can also use median in 810.For example, 810 can be used one or more medians to determine First cross-correlation.Then 810 can be used identical one or more medians to determine the second cross-correlation correlation.As previously It is described in detail, the number of required processing operation can be reduced using median in being determined to cross-correlation coefficient.

At least one median can reflect the predefined pass between two candidate mobile radio local reference signals System.For example, 810 can be the mutual complex conjugate fact come according to two candidate mobile radio local reference signals Between be worth.The two candidate mobile radio local reference signals can be PSS.As detailed above, in conventional LTE system In, by (r=1) and r=2) PSS of mark can be mutual complex conjugate.

It the use of the example implementations of the flow chart of median 800 may include based on mesh in determining cross-correlation coefficient Centre frequency is marked to handle the digitized signal received.Method 800 can connect in 810 used as the processed of result The digitized signal received determines multiple cross-correlation coefficients.For example, method 800 can be based at least two characteristic signals frequencies To select the target center frequency for handling the digitized signal received.Each characteristic signals frequency can be predetermined with performance One of the candidate mobile radio local reference signal of at least two of the relationship of justice is associated.In other words, method 800 can pass through Associated frequency is selected to receive for handling using with the complex conjugate candidate mobile radio local reference signal Digitized signal target center frequency.Specifically, the example implementations of flow chart 800 can be according on the frequency axis Each midpoint between pre-stored candidate mobile radio local reference signal handles the digitized signal received.

Fig. 9 shows using being calculated cross-correlation coefficient the exemplary system for supporting carrier wave polymerization processing.Fig. 9's Various assemblies and circuit can be implemented in such as movement station of UE 900 etc.Such as antenna 202, RF shown in Fig. 9 Transceiver 204, memory 206, frequency scanning circuit 208, frequency scanning postpositive disposal circuit 210 and PLMN search controller 212 etc many components can be operated using the substantially similar way being described in detail for UE 102 shown in Fig. 2.Such as needle Fig. 2 is described in detail, these circuits may be implemented as independent circuit, for example, independent integrated circuit.However, it is some or Whole circuits (for example, frequency scanning circuit 208, frequency scanning postpositive disposal circuit 210, PLMN search controller 212 and/or Carrier wave polymerize circuit 916) individually shared programmable processor (for example, microprocessor) Lai Shixian can be passed through.

Fig. 9 shows mobile radio communication terminal equipment (that is, for example, UE 900), the mobile radio communication terminal Equipment includes at least one circuit for the method for being configured as implementing to handle the digitized signal received.Antenna 202, RF transceiver 204 and memory 206, which can execute, such as to be received and stores wireless radio signal and be stored in local Operation in memory etc.Frequency scanning circuit 208 can be configured as determined for the digitized signal that receives it is multiple Cross-correlation coefficient.Frequency scanning circuit 208 can be by mobile by the digitized signal received and multiple pre-stored candidates It is multiple mutual to determine to carry out cross-correlation for corresponding candidate's mobile radio local reference signal in radio local reference signal Each of relationship number cross-correlation coefficient.

Frequency scanning postpositive disposal circuit 210 can be additionally configured to select one from identified multiple cross-correlation coefficients A or multiple cross-correlation coefficients.

Compared with UE 102 shown in Fig. 2, UE 900 shown in Fig. 9 may include carrier wave polymerization circuit 916.Carrier wave Polymerization circuit 916 can be configured as selected cross-correlation coefficient based on one or more and handle to execute carrier wave polymerization to connect It is connected to mobile radio communication network.

UE 900 can be configured as to be operated on the mobile radio communication network of such as LTE network etc.UE 900 It can be additionally configured to operate in LTE-A network.

One in multiple pre-stored candidate mobile radio local reference signals used by frequency scanning circuit 208 Or multiple it can be multiple synchronizing sequences.Similar to described above, one or more of multiple synchronizing sequences be can be PSS those of used in multiple PSS, such as LTE communication network.

Frequency scanning postpositive disposal circuit 210 can be by identifying one or more in identified multiple cross-correlation coefficients A maximum value from multiple cross-correlation coefficients selects cross-correlation coefficient.Correspondingly, postpositive disposal circuit 210 is frequency scanned again One example implementations, which can be configured as based on selected cross-correlation coefficient, to be selected to polymerize the one of processing for carrier wave A or multiple carrier channels.For example, frequency scanning postpositive disposal circuit 210 can choose the digitlization letter for being associated with and receiving Number generate the carrier channel of the pre-stored candidate mobile radio local reference signal of high cross-correlation measurement.

Frequency scanning postpositive disposal circuit 210 can select to be used for carrier wave polymerization from multiple predefined carrier channels The carrier channel of processing.In addition, one or more of multiple predefined carrier channels can correspond to EARFCN.

The candidate being pre-stored by the one or more that frequency scanning circuit 208 is used to be determined cross-correlation coefficient is mobile Radio local reference signal can reflect the characteristic of the carrier channel of radio access network.For example, multiple pre-stored candidates The frequency characteristic of one or more of mobile radio local reference signal can correspond to predetermined with radio access network The adopted associated frequency of carrier channel.According to predefined frequency scheme, multiple pre-stored candidate mobile radios are locally joined Examining at least one of signal can be different from another in multiple pre-stored candidate mobile radio local reference signals. In another illustrative aspect, according to predefined frequency scheme, the pre-stored candidate mobile radio of one or more is locally joined Examining signal can be the predefined synchronizing sequence rotated in frequency, for example, base band PSS.As detailed previously, each Pre-stored candidate mobile radio local reference signal can be shifted in a frequency domain according to the centre frequency of EARFCN after Base band PSS (for example, by r=0,1 or 2 to define).

In addition, the frequency values that are spaced at of a pair of pre-stored candidate mobile radio local reference signal may with it is another Difference between the pre-stored candidate mobile radio local reference signal of a pair is identical.For example, a pair of pre-stored time Select mobile radio local reference signal can be on the frequency axis by separated f_sDistance.The mobile nothing of the pre-stored candidate of another pair Line electricity local reference signal can also be on the frequency axis by separated f_sDistance.Parameter f_sIt can be included in for example from about In the wide frequency ranges of 10kHz to about 500kHz.

As disclosed previously, at least one of the difference between candidate mobile radio local reference signal can be right It should be in the difference between the centre frequency of multiple predefined carrier channels.Illustrative aspect is shown in Fig. 4, wherein pre-stored Candidate mobile radio local reference signal is respectively focused on frequency axis according to EARFCN centre frequency.

UE 900 can be additionally configured to use median in being determined cross-correlation coefficient.For example, frequency scanning One or more medians can be used to determine the first cross-correlation coefficient in circuit 208.Frequency scanning circuit 208 can also use Identical one or more median determines the second cross-correlation coefficient.

In this illustrative aspect, at least one median can reflect at least two candidate mobile radios and locally join Examine the predefined relationship between signal.For example, at least two candidate mobile radio local reference signals can be it is mutual multiple Conjugation.When candidate mobile radio local reference signal is to be defined used in certain LTE systems by (r=1) and (r=2) PSS when, may exist the relationship.

Frequency scanning circuit 208 can be handled the digitized signal received based on target center frequency, and Correspondingly multiple cross-correlation coefficients can be determined based on the processed digitized signal received.Frequency scanning circuit can be with Based at least two characteristic signals frequencies come each of selection target centre frequency, wherein at least two characteristic signals frequency It is associated with the candidate mobile radio local reference signal for showing predefined relationship.For example, two candidate mobile radio sheets Ground reference signal can be mutual complex conjugate.What frequency scanning circuit 208 can be received by target center frequency processing Digitized signal, wherein the target center frequency be and at least two complex conjugate candidate mobile radio local reference signal phases Midpoint between associated frequency.For example, frequency scanning circuit 208 can select mesh according to handling as described in Figure 5 Mark centre frequency.

Figure 10 shows the flow chart 1000 being described in detail to the method for handling the digitized signal received.1010 May include in the digitized signal that will receive and multiple pre-stored candidate mobile radio local reference signals at least One is compared with the multiple cross-correlation coefficients of determination.1020 may include being implemented based on identified multiple cross-correlation coefficients For the mobile radio cell scan of mobile radio communication network.

Method 1000 can be implemented in the mobile radio communication network for using such as LTE or LTE-A network etc In equipment.In addition, predefined frequency scheme relevant to pre-stored candidate mobile radio local reference signal can be with base In multiple carrier channels of radio access network (for example, LTE network or LTE-A network).

Multiple pre-stored one or more of candidate mobile radio local reference signals can used in 1010 To be multiple synchronizing sequences.One or more of multiple synchronizing sequences can be multiple PSS, and multiple PSS is, for example, LTE net PSS those of used in network.

In addition, the mobile radio cell scan in 1020 can be based on to one in identified multiple cross-correlation coefficients The determination of a or multiple maximum cross-correlation coefficients.For example, the mobile radio cell scan in 1020 can be used it is identified With one or more cross-correlation coefficients of maximum value in multiple cross-correlation coefficients.Method 1000 can based on one or more most Big cross-correlation coefficient selects the carrier channel for mobile radio cell scan.Method 1000 can be based on mutual with maximum Relationship number associated one or more characteristic signals frequencies select carrier channel from multiple pre-stored carrier channels.Example Such as, method 1000, which can choose, corresponds to candidate mobile radio associated with one of maximum cross-correlation coefficient locally with reference to letter Number carrier channel.One or more can be selected in multiple predefined carrier channels of mobile radio cell scan It is a to can correspond to EARFCN.

For determining that multiple pre-stored candidate mobile radios of multiple cross-correlation coefficients are locally joined used in 1010 Examining one or more of signal can reflect the characteristic of carrier channel of radio access network.More specifically, multiple pre-stored The frequency characteristic of one or more of candidate mobile radio local reference signal can correspond to and radio access network The associated frequency of predefined carrier channel.It is multiple to prestore according to predefined frequency scheme similar to the method for Fig. 3 At least one of candidate mobile radio local reference signal of storage can be different from multiple pre-stored candidate mobile wireless Another in electric local reference signal.It is multiple pre-stored according to predefined frequency scheme as being directed to disclosed in Fig. 4 One or more of candidate mobile radio local reference signal can be the predefined synchronous sequence rotated in frequency Column, that is, can be the baseband synchronization sequence according to the centre frequency of candidate carrier channel in frequency upper shift position.

The pre-stored candidate mobile radio local reference signal of a pair is along frequency axis by separated distance in frequency It can be identical as the candidate mobile radio local reference signal that another pair is pre-stored.For example, a pair of pre-stored candidate is mobile Radio local reference signal can be in frequency by separated f_sDistance.Second pair of pre-stored candidate mobile radio is local Reference signal can also be in frequency by separated f_sDistance.In certain illustrative aspects, f_sIt may be at for example from about Within the scope of 10kHz to about 500kHz.

As detailed previously, between pre-stored candidate mobile radio local reference signal used in 1010 At least one of difference can correspond to the difference between the centre frequency of multiple predefined carrier channels.For example, prestoring The position of the candidate mobile radio local reference signal of storage on the frequency axis can correspond to multiple predefined carrier channels Centre frequency and correspondingly may correspond to predefined carrier wave along any difference of the frequency axis in frequency and believe The centre frequency in road.

Method 1000 can use median by the way of being similar to method 300.For example, 1010 can be configured as Cross-correlation coefficient is determined using median.1010 can be used one or more medians to determine the first cross-correlation coefficient, And the second cross-correlation coefficient can also be determined using identical one or more medians.

At least one median used in 1010 illustrative aspect can reflect at least two pre-stored candidates Predefined relationship between mobile radio local reference signal.For example, at least two pre-stored candidate mobile radio sheets Ground reference signal can be mutual complex conjugate.In another illustrative aspect, at least two pre-stored candidate mobile radios Local reference signal can be PSS.

1010 illustrative aspect using median can also include being received based on target center frequency to handle Digitized signal.1010 may then based on the processed digitized signal received to determine multiple cross-correlation coefficients.This Outside, 1,010 at least two characteristic signals frequencies are also based on carry out selection target centre frequency, wherein each characteristic signals frequency It is associated with one of at least two pre-stored candidate mobile radio local reference signals of the predefined relationship of performance.1010 can Target center frequency to be selected as to the midpoint between at least two characteristic signals frequencies, it is similar to shown in Fig. 5.1010 can Target center frequency to be selected as to the candidate mobile radio local reference signal each of pre-stored at least two Midpoint between the centre frequency of associated carrier channel.

Figure 11 shows another possible configuration of UE, which may be implemented to be similar to method shown in Figure 10.Figure 11 UE 1100 is shown, which may include many components identical with UE 102 and UE 900 and circuit.E.g., including Antenna 202, RF transceiver 204, memory 206 and frequency scan postpositive disposal circuit 210 component and circuit can with UE 102, UE 900 and 1100 substantially similar way of UE operate.In addition, mobile radio cell scan circuit 214 can be with Execute many identical characteristics in UE 102 and 1100 the two of UE.However, the present disclosure is not limited to any sides in these aspects Face, and the circuit of any one of UE 102, UE 900 or UE 1100 and component can with various configurations rearranging or Tissue.

Figure 11 shows mobile radio communication apparatus (that is, for example, UE 1100), the mobile radio communication apparatus packet Include antenna 202, RF transceiver 204, memory 206, frequency scanning circuit 1108, frequency scanning postpositive disposal circuit 210 and Mobile radio cell scan circuit 1114.Frequency scanning circuit 1108 can be configured as the digitized signal that will receive with Multiple pre-stored at least one of candidate mobile radio local reference signals are compared with the multiple cross correlations of determination Number.Mobile radio cell scan circuit 1114 can be configured as based on identified multiple cross-correlation coefficients and be directed to movement Radio circuit executes mobile radio cell scan.Mobile radio cell scan circuit 1114 can use and UE The mobile radio cell scan circuit 214 provided in 102 substantially similar mode operates.

UE 1100 can be communicated on LTE or LTE-A network.

One in multiple pre-stored candidate mobile radio local reference signals used by frequency scanning circuit 1108 It is a or multiple can be multiple synchronizing sequences.For example, one in multiple pre-stored candidate mobile radio local reference signals It is a or multiple can be multiple PSS.

Frequency scanning postpositive disposal circuit 210 can be configured as one determined in multiple identified cross-correlation coefficients Or multiple maximum cross-correlation coefficients.Mobile radio cell scan circuit 1114 can be accordingly based on by frequency scanning postposition The maximum cross-correlation coefficient that circuit 210 identifies is managed to execute mobile radio cell scan.For example, mobile radio cell scan Circuit 1114 can be identified possible for the one or more of mobile radio cell scan based on maximum cross-correlation coefficient Carrier channel.Mobile radio cell scan circuit 1114 can select possible carrier wave from multiple predefined carrier channels Channel.One or more of multiple predefined carrier channels can correspond to EARFCN.

As previously described above, one or more in multiple pre-stored candidate mobile radio local reference signals The characteristic of a carrier channel that can reflect wireless access network.Illustrative aspect may include plurality of pre-stored candidate shifting The case where frequency characteristic (such as centre frequency) of one or more reflection EARFCN in dynamic radio local reference signal.Phase The frequency characteristic of Ying Di, one or more of multiple pre-stored candidate mobile radio local reference signals can correspond to Frequency associated with the predefined carrier channel of radio access network.

According to predefined frequency scheme, at least one pre-stored candidate mobile radio local reference signal can not It is same as another in multiple pre-stored candidate mobile radio local reference signals.Similar to what is be described in detail for Fig. 4, root According to predefined frequency scheme, multiple pre-stored one or more of candidate mobile radio local reference signals be can be The predefined synchronizing sequence rotated in frequency.As shown in figure 4, multiple pre-stored candidate mobile radios locally refer to One or more of signal can be the baseband synchronization sequence of such as PSS vector etc, and the baseband synchronization sequence is along frequency Rate axis carries out shifting in frequency to the centre frequency of the carrier channel corresponding to such as EARCN etc.Based in EARFCN The interval of frequency of heart, a pair in multiple pre-stored candidate mobile radio local reference signals is on the frequency axis by separated Distance can be identical as another pair in multiple pre-stored candidate mobile radio local reference signals in frequency.For example, Multipair pre-stored candidate mobile radio local reference signal can be by separately identical frequency distance f_s.Parameter f_sIt can be Such as from about 10kHz to the range of about 500kHz in.Therefore, pre-stored candidate mobile radio local reference signal it Between at least one difference can correspond to the difference between the centre frequency of multiple predefined carrier channels.

Frequency scanning circuit 1108 can be configured as uses median in being determined to multiple cross-correlation coefficients.Example Such as, one or more medians can be used to determine the first cross-correlation coefficient in frequency scanning circuit 1108.Frequency scanning circuit 1108 can also determine the second cross-correlation coefficient using identical one or more medians.Above for formula (5) to this One process is described.

Median can reflect predefined between at least two pre-stored candidate mobile radio local reference signals Relationship.At least two pre-stored candidate mobile radio local reference signals can be mutual complex conjugate.For example, at least two A pre-stored candidate mobile radio local reference signal can be PSS vector, for example, in LTE system by (r=1) and (r=2) the PSS vector defined.

Frequency scanning circuit 1108 can handle the digitized signal received according to target center frequency, and corresponding Ground can determine multiple cross-correlation coefficients based on the processed digitized signal received.Frequency scanning circuit 1108 can be with Based at least two characteristic signals frequencies come selection target centre frequency, wherein each characteristic signals frequency and this at least two One of pre-stored candidate mobile radio local reference signal is associated.For example, frequency scanning circuit 1108 can be by center Frequency is chosen to be the midpoint on frequency axis between at least two pre-stored candidate mobile radio local reference signal.

Figure 12 shows the flow chart 1200 for illustrating the method handled the digitized signal received.Similar to stream The 1010 of journey Figure 100 0,1210 may include the digitized signal and multiple pre-stored candidate mobile radio sheets that will be received Ground reference signal is compared with the multiple cross-correlation coefficients of determination.1220 may include based on identified multiple cross-correlation coefficients To execute carrier wave polymerization processing.

1220 can execute at carrier wave polymerization for the mobile radio communication network of such as LTE or LTE-A network etc Reason.

Predefined frequency scheme corresponding with 1210 pre-stored candidate mobile radio local reference signal can With multiple carrier channels based on radio access network.Similar to detailed above, predefined frequency scheme can be based on The centre frequency that possible EARFCN assumes.For example, one or more candidate's mobile radio local reference signals are in frequency axis On can be centered on the centre frequency assumed of corresponding EARFCN.

Multiple pre-stored one or more of candidate mobile radio local reference signals can be multiple in 1210 Synchronizing sequence.One or more of multiple synchronizing sequences can be multiple PSS.

It is as detailed previously, in 1220, method 1200 may include based on identified multiple cross-correlation coefficients come Execute carrier wave polymerization processing.For example, 1220 can be based on the maximum cross-correlation coefficient of one or more in multiple cross-correlation coefficients To execute carrier wave polymerization processing.1220 can also be poly- for carrier wave to select including maximum cross-correlation coefficient based on one or more Close the carrier channel of processing.For example, 1220 can be from multiple predefined carrier channels (for example, from one group of possible EARFCN) Middle selection carrier channel.Method 1200 can be in 1220 based on one associated with one or more maximum cross-correlation coefficients Or multiple characteristic signals frequencies come select for carrier wave polymerize processing carrier channel.For example, multiple pre-stored candidates are mobile During one or more of radio local reference signal can be shared with the carrier channel in multiple predefined carrier channels Frequency of heart.1220 can choose the carrier channel for carrier wave polymerization processing, the carrier channel have with when with the number that receives The center of the pre-stored candidate mobile radio local reference signal of maximum cross-correlation value is generated when word signal is compared The centre frequency that frequency matches.It is as detailed previously, corresponding to generating the high degree of correlation with the digitized signal received The carrier channel of pre-stored candidate mobile radio local reference signal can be the suitable candidate load for mobile communication Wave channel.

One in multiple pre-stored candidate mobile radio local reference signals in 1210 for determining cross correlation value The characteristic of a or multiple carrier channels that can reflect radio access network.In addition, multiple pre-stored candidate mobile radios One or more of local reference signal can have corresponding to related to the predefined carrier channel of radio access network The frequency characteristic of the frequency of connection.As above for described in other illustrative aspects, according to predefined frequency scheme, 1210 Used in multiple pre-stored at least one of candidate mobile radio local reference signals can be different from candidate shifting Move another in radio local reference signal.As being described in detail for Fig. 4, according to predefined frequency scheme, one or Multiple pre-stored candidate mobile radio local reference signals can be the predefined synchronizing sequence rotated in frequency.

Multiple pre-stored candidate mobile radio local reference signals can be with table when being drawn in a frequency domain in 1210 Existing similarity.For example, a pair of pre-stored candidate mobile radio local reference signal is existed by separated distance on the frequency axis It can be identical as the candidate mobile radio local reference signal that another pair is pre-stored in frequency.In other words, two pairs it is pre-stored Candidate mobile radio local reference signal may include by distance f identical in frequency_sSeparated pre-stored candidate Mobile radio local reference signal.In certain illustrative aspects, f_sIt may be at for example from about 10kHz to about 500kHz Within the scope of.Correspondingly, at least one of the difference between pre-stored candidate mobile radio local reference signal can The difference between centre frequency to correspond to multiple predefined carrier channels.

Method shown in flow chart 1200 can also reduce process demand using median.For example, 1200 can be with The first cross-correlation coefficient is determined using identical one or more medians in 1210, this is identical one or more intermediate Value can also be used to determine the second cross-correlation coefficient.At least one median used in 1210 illustrative aspect can With the predefined relationship reflected between at least two candidate mobile radio local reference signals.At least two candidate mobile nothing Line electricity local reference signal can be mutual complex conjugate, for example, the PSS vector defined by (r=1) and (r=2).

In 1210, method 1200 can handle the digitized signal received based on target center frequency.Therefore, 1210 can determine multiple cross-correlation coefficients based on the processed digitized signal received.1210 can be based at least two A characteristic signals frequency carrys out selection target centre frequency, wherein each characteristic signals frequency and at least two candidate mobile wireless One of electric local reference signal is associated.In another illustrative aspect, target center frequency can be at least two characteristic signals Midpoint between frequency.

Figure 13 shows UE 1300.The many components of UE 1300 and circuit correspond to UE 102,900 and 1100, for example, day Line 202, RF transceiver 204, memory 206, frequency scanning postpositive disposal circuit 210 and PLMN search controller 212.This Outside, can using polymerize with the carrier wave of UE 900 circuit 916 it is substantially similar by the way of come realize carrier wave polymerize circuit 1316.So And many different configurations of the component and circuit to UE1300 are possible, and the disclosure be certainly not limited to this aspect or Any aspect.

Similar to UE 102, UE 900 and UE 1100, UE 1300 be configured as to the digitized signal received into The mobile radio communication terminal equipment of row processing.For example, frequency scanning circuit 1308 can be configured as the number that will be received Word signal is compared with multiple pre-stored candidate mobile radio local reference signals with the multiple cross-correlation coefficients of determination. UE 1300 can also include the circuit or component of such as carrier wave polymerization circuit 916 etc, can be configured as based on by frequency Multiple cross-correlation coefficients determined by scanning circuit 1308 execute carrier wave polymerization processing to be directed to mobile radio communication network.

UE 1300 can be operated on the mobile radio communication network of such as LTE or LTE-A etc.

Predefined frequency scheme corresponding with multiple pre-stored candidate mobile radio local reference signals can be with Multiple carrier channels based on radio access network, for example, being based on one group EARFCN associated with LTE or LTE-A network.

Another illustrative aspect may include the multiple pre-stored candidate shiftings wherein used by frequency scanning circuit 1308 The case where one or more of dynamic radio local reference signal can be multiple synchronizing sequences.For example, multiple synchronizing sequences One or more of can be multiple PSS.

It can be based on in identified multiple cross-correlation coefficients by the carrier wave polymerization processing that carrier wave polymerization circuit 916 is run The determination of one or more maximum cross-correlation coefficients.For example, carrier wave polymerization circuit 916 can be configured as based on one or more Maximum cross-correlation coefficient polymerize one or more candidate carrier channels of processing to identify for carrier wave.Carrier wave polymerize circuit 916 can be based on one or more characteristic signals frequencies associated with one or more maximum cross-correlation coefficients come from multiple pre- It defines and selects candidate carrier channel in carrier channel.Illustrative aspect may include wherein carrier channel be possible from one group The case where being selected in EARFCN.

As for Fig. 4 deeply described in, multiple pre-stored mobile nothings of candidate for being used by frequency scanning circuit 1308 One or more of line electricity local reference signal can reflect the characteristic of the carrier channel of radio access network.For example, multiple The frequency characteristic of one or more of pre-stored candidate mobile radio local reference signal can correspond to and radio Access the associated frequency of predefined carrier channel of net.According to predefined frequency scheme, pre-stored candidate mobile wireless At least one of electric local reference signal can be different from multiple pre-stored candidate mobile radio local reference signals Another, such as described in Figure 4.Certain relevant illustrative aspects are described for Fig. 4, it discloses Wherein according to predefined frequency scheme, multiple pre-stored one or more of candidate mobile radio local reference signals It can be the predefined synchronizing sequence rotated in frequency.

One in multiple pre-stored candidate mobile radio local reference signals used by frequency scanning circuit 1308 It is a or multiple symmetry can be showed when being switched in frequency domain.For example, multiple pre-stored candidate mobile radios are local A pair distance separated from each other on the frequency axis in reference signal can be with multiple mobile nothings of pre-stored candidate in frequency Another pair in line electricity local reference signal is identical.In other words, multiple pre-stored candidate mobile radio local reference signals In two can be by separation distance f in frequency_s, and in multiple pre-stored candidate mobile radio local reference signals Other two can also be in frequency by separately identical distance f_s.Parameter f_sIt can be for example from about 10kHz to 500kHz's In range.

The centre frequency of pre-stored candidate mobile radio local reference signal may correspond to multiple predefined The centre frequency of carrier channel, such as shown in Fig. 4.

UE 1300 can use median using with UE 102,900 and 1100 substantially similar ways.For example, frequency One or more medians can be used to determine the first cross-correlation coefficient in scanning circuit 1308.Frequency scanning circuit 1308 may be used also The second cross-correlation coefficient is determined to be configured with one or more of identical median.

UE 1300 can use median in being determined to cross-correlation coefficient.It is predetermined that performance can be used in UE 1300 The pre-stored candidate mobile radio local reference signal of adopted relationship calculates cross-correlation coefficient to use median.Extremely Few two pre-stored candidate mobile radio local reference signals can be mutual complex conjugate.For example, this is at least two pre- The candidate mobile radio local reference signal of storage can be the complex conjugate PSS vector of performance.

Frequency scanning circuit 1308 can be configured as according to target center frequency the digitized signal for handling and receiving, Being used for median in the determination to cross-correlation coefficient.Frequency scanning circuit 1308 may then based on processed receive Digitized signal determine multiple cross-correlation coefficients.For example, frequency scanning circuit 1308 can be complex conjugate pre- based on showing The candidate mobile radio local reference signal of storage carrys out selection target centre frequency.Frequency scanning circuit 1308 can also be matched It is set to by identifying on the frequency axis each other between complex conjugate pre-stored candidate mobile radio local reference signal Selection target centre frequency is carried out at midpoint.

Although the present invention is had been described in detail and shown with reference to specific embodiment, those skilled in the art should Understand, it, can be in form and details without departing substantially from the scope and spirit of the present invention being defined by the following claims Aspect makes various changes to it.Thus the scope of the present invention is indicated by appended claims and is intended to comprising falling into right It is required that equivalency range and meaning in all changes.

Claims (19)

1. a kind of mobile radio communication terminal equipment, which includes that at least one is configured as Implement the circuit of the method handled the digitized signal received, which comprises

Multiple cross-correlation coefficients are determined for the digitized signal received, wherein in the multiple cross-correlation coefficient Each cross-correlation coefficient is by by the digitized signal received and multiple pre-stored candidate mobile radio sheets Corresponding candidate's mobile radio local reference signal carries out cross-correlation to determine in ground reference signal；

One or more cross-correlation coefficients are selected from identified multiple cross-correlation coefficients；And

Mobile radio cell scan is executed based on one or more of selected cross-correlation coefficient, is thus connected to shifting Dynamic radio circuit,

Wherein, according to predefined frequency scheme, in the multiple pre-stored candidate mobile radio local reference signal At least one is different from another in the multiple pre-stored candidate mobile radio local reference signal, and wherein, According to the predefined frequency scheme, one in the multiple pre-stored candidate mobile radio local reference signal or Multiple includes the predefined synchronizing sequence rotated in frequency.

2. mobile radio communication terminal equipment according to claim 1,

Wherein, one or more selected cross-correlation coefficients are by identifying one in identified multiple cross-correlation coefficients Or multiple maximum values carry out selection.

3. mobile radio communication terminal equipment according to claim 2,

Wherein, carrier channel is based on one or more of selected cross-correlation coefficients and is selected for the mobile nothing Line electricity cell scan.

4. mobile radio communication terminal equipment according to claim 1,

Wherein, the first cross-correlation coefficient is determined using one or more medians；And

Wherein, the second cross-correlation coefficient is determined using one or more of medians.

5. mobile radio communication terminal equipment according to claim 4,

Wherein, at least one median in the median reflects in the candidate mobile radio local reference signal extremely Predefined relationship between few two candidate mobile radio local reference signals.

6. mobile radio communication terminal equipment according to claim 5,

Wherein described at least two candidate mobile radio local reference signals are mutual complex conjugate.

7. the mobile radio communication terminal equipment according to any claim in claim 4 to 6,

Wherein, the digitized signal received is processed based on target center frequency, and the multiple mutual Relationship number is determined based on the processed digitized signal received.

8. a kind of mobile radio communication terminal equipment, which includes that at least one is configured as Implement the circuit of the method handled the digitized signal received, which comprises

Multiple cross-correlation coefficients are determined for the digitized signal received, wherein in the multiple cross-correlation coefficient Each cross-correlation coefficient is by by the digitized signal received and multiple pre-stored candidate mobile radio sheets Corresponding candidate's mobile radio local reference signal carries out cross-correlation to determine in ground reference signal；

One or more cross-correlation coefficients are selected from identified multiple cross-correlation coefficients；And

Carrier wave polymerization processing is executed based on one or more of selected cross-correlation coefficient, is thus connected to mobile wireless Telecommunication network,

Wherein, according to predefined frequency scheme, in the multiple pre-stored candidate mobile radio local reference signal At least one is different from another in the multiple pre-stored candidate mobile radio local reference signal, and wherein, According to the predefined frequency scheme, one in the multiple pre-stored candidate mobile radio local reference signal or Multiple includes the predefined synchronizing sequence rotated in frequency.

9. mobile radio communication terminal equipment according to claim 8,

Wherein, one or more selected cross-correlation coefficients are by identifying one in identified multiple cross-correlation coefficients Or multiple maximum values carry out selection.

10. mobile radio communication terminal equipment according to claim 9,

Wherein, carrier channel is based on one or more of selected cross-correlation coefficients and is selected for the carrier wave and gathers Conjunction processing.

11. mobile radio communication terminal equipment according to claim 8,

Wherein, the first cross-correlation coefficient is determined using one or more medians；And

Wherein, the second cross-correlation coefficient is determined using one or more of medians.

12. mobile radio communication terminal equipment according to claim 11,

Wherein, at least one median in the median reflects in the candidate mobile radio local reference signal extremely Predefined relationship between few two candidate mobile radio local reference signals.

13. a kind of mobile radio communication terminal equipment, which includes that at least one is configured For the circuit for implementing the method handled the digitized signal received, which comprises

By in the digitized signal received and multiple pre-stored candidate mobile radio local reference signals at least One is compared with the multiple cross-correlation coefficients of determination；And

It is directed to mobile radio communication network based on identified multiple cross-correlation coefficients and executes mobile radio cell scan,

Wherein, according to predefined frequency scheme, in the multiple pre-stored candidate mobile radio local reference signal At least one is different from another in the multiple pre-stored candidate mobile radio local reference signal, and wherein, According to the predefined frequency scheme, one in the multiple pre-stored candidate mobile radio local reference signal or Multiple includes the predefined synchronizing sequence rotated in frequency.

14. mobile radio communication terminal equipment according to claim 13,

Wherein, the first cross-correlation coefficient is determined using one or more medians；And

Wherein, the second cross-correlation coefficient is determined using one or more of medians.

15. mobile radio communication terminal equipment according to claim 14,

Wherein, the digitized signal received is processed based on target center frequency, and the multiple mutual Relationship number is determined based on the processed digitized signal received.

16. a kind of method for handling the digitized signal received, this method comprises:

Multiple cross-correlation coefficients are determined for the digitized signal received, wherein in the multiple cross-correlation coefficient Each cross-correlation coefficient is by by the digitized signal received and multiple pre-stored candidate mobile radio sheets Corresponding candidate's mobile radio local reference signal carries out cross-correlation to determine in ground reference signal；

One or more cross-correlation coefficients are selected from identified multiple cross-correlation coefficients；And

Selected cross-correlation coefficient executes mobile radio cell scan based on one or more, is thus connected to mobile nothing Line telecommunication network,

Wherein, according to predefined frequency scheme, in the multiple pre-stored candidate mobile radio local reference signal At least one is different from another in the multiple pre-stored candidate mobile radio local reference signal, and wherein, According to the predefined frequency scheme, one in the multiple pre-stored candidate mobile radio local reference signal or Multiple includes the predefined synchronizing sequence rotated in frequency.

17. according to the method for claim 16,

Wherein, one or more of selected cross-correlation coefficients are by identifying in identified multiple cross-correlation coefficients One or more maximum values carry out selection.

18. according to the method for claim 17,

Wherein, carrier channel is based on one or more of selected cross-correlation coefficients and is selected for the mobile nothing Line electricity cell scan.

19. according to the method for claim 16,

Wherein, the first cross-correlation coefficient is determined using one or more medians；And

Wherein, the second cross-correlation coefficient is determined using one or more of medians.