CN102300286B - Method and device for obtaining auxiliary synchronization information and method and device for searching adjacent cells - Google Patents
Method and device for obtaining auxiliary synchronization information and method and device for searching adjacent cells Download PDFInfo
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Abstract
The invention discloses a method and device for obtaining auxiliary synchronization information and a method and device for searching adjacent cells. The method for obtaining the auxiliary synchronization information comprises the steps of: generating an auxiliary synchronization signal by using main synchronization information and auxiliary synchronization information; estimating an auxiliary synchronization channel on the basis of the generated auxiliary synchronization signal; and detecting the auxiliary synchronization information on the basis of an estimation result on the auxiliary synchronization channel so as to determine the improved auxiliary synchronization information.
Description
Technical field
The present invention relates to moving communicating field, in particular to a kind of method and apparatus and a kind of neighboring cell search method and apparatus that obtains improved auxiliary synchronizing information.
Background technology
In mobile communication system, the process of user side and community being carried out to Frequency Synchronization acquisition time and detected cells number is called Cell searching.User side must periodically carry out neighboring cell search, to upgrade the community that will connect and find the candidate cell for switching.In some current systems, based on master sync signal PSS and auxiliary synchronous signals SSS, carry out Cell searching, neighboring cell search is wherein divided into two stages conventionally.For example,, in the first stage at neighboring cell search LTE system (long evolving system) in the situation that, by the blind Detecting of primary synchronization channel PSCH being obtained to master sync signal sign PSS ID and slot timing (5ms Timing Synchronization); In the second stage of neighboring cell search, based on the first stage, detect PSS ID and the slot timing obtaining, auxiliary synchronization channel SSCH is detected and obtains cell group identification Group ID, circulating prefix-length CP_type and frame are regularly.
Summary of the invention
An object of the present invention is, obtain auxiliary synchronizing information more accurately.Another object of the present invention is, carries out neighboring cell search, thereby improve the result of Cell searching by auxiliary synchronizing information more accurately.
According to one embodiment of present invention, provide a kind of method of obtaining improved auxiliary synchronizing information, having comprised: utilized main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals; Auxiliary synchronous signals based on generating is estimated auxiliary synchronization channel; And based on the estimated result of auxiliary synchronization channel is detected to auxiliary synchronizing information, thereby determine improved auxiliary synchronizing information.
In the method, owing to utilizing auxiliary synchronous signals to estimate auxiliary synchronization channel, and utilize the estimated result of auxiliary synchronization channel to detect auxiliary synchronizing information, thereby improved the auxiliary synchronizing information of obtaining.
In addition, also provide according to one embodiment of present invention a kind of neighboring cell search method, having comprised: based on master sync signal, obtain main synchronizing information; Utilize main synchronizing information to obtain auxiliary synchronizing information; And utilize auxiliary synchronous signals to obtain improved auxiliary synchronizing information based on described main synchronizing information and auxiliary synchronizing information.
In the method, owing to further having utilized auxiliary synchronous signals to obtain auxiliary synchronizing information, thus improved the auxiliary synchronizing information of obtaining, thus the Search Results of neighbor cell also improved.
In addition, also provide according to one embodiment of present invention a kind of device that obtains improved auxiliary synchronizing information, having comprised: auxiliary synchronous signals maker, it is arranged to and utilizes main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals; Auxiliary synchronization channel estimator, its auxiliary synchronous signals being arranged to based on generating is estimated auxiliary synchronization channel; And auxiliary synchronizing information detector, it is arranged to based on the estimated result of auxiliary synchronization channel is detected to auxiliary synchronizing information, thereby determines improved auxiliary synchronizing information.
In addition, also provide according to one embodiment of present invention a kind of neighboring cell search device, having comprised: main synchronizing information getter, it is arranged to based on master sync signal and obtains main synchronizing information; The first auxiliary synchronizing information getter, it is arranged to and utilizes main synchronizing information to obtain auxiliary synchronizing information; And the second auxiliary synchronizing information getter, it is arranged to based on described main synchronizing information and auxiliary synchronizing information and utilizes auxiliary synchronous signals to obtain improved auxiliary synchronizing information.
It is identical with corresponding method that said apparatus also has advantages of.
Accompanying drawing explanation
The present invention can be by reference to hereinafter given description and being better understood by reference to the accompanying drawings.Described accompanying drawing comprises in this manual and forms the part of this specification together with detailed description below, and is used for further illustrating the preferred embodiments of the present invention and explains principle and advantage of the present invention.In the accompanying drawings:
Fig. 1 shows the indicative flowchart that obtains the method for synchronizing information of the prior art;
Fig. 2 shows the flow chart that obtains the method for improved auxiliary synchronizing information according to an embodiment of the invention;
Fig. 3 further shows the details of the step of the auxiliary synchronizing information of detection in the method shown in Fig. 2;
Fig. 4 shows the flow chart that obtains the method for improved synchronizing information according to an embodiment of the invention;
Fig. 5 shows the flow chart of neighboring cell search method according to an embodiment of the invention;
Fig. 6 shows the schematic diagram that obtains the device of improved auxiliary synchronizing information according to an embodiment of the invention;
Fig. 7 shows the details of the auxiliary synchronizing information detector in Fig. 6; And
Fig. 8 shows the system block diagram of wireless receiver according to an embodiment of the invention.
Embodiment
In connection with accompanying drawing, one exemplary embodiment of the present invention is described hereinafter.All features of actual execution mode are not described for clarity and conciseness, in specification.Yet, should understand, in the process of any this practical embodiments of exploitation, must make a lot of decisions specific to execution mode, to realize developer's objectives, and these decisions may change to some extent along with the difference of execution mode.In addition,, although will also be appreciated that development is likely very complicated and time-consuming, concerning having benefited from those skilled in the art of present disclosure, this development is only routine task.
At this, also it should be noted is that, for fear of the details because of unnecessary fuzzy the present invention, only show in the accompanying drawings with according to the closely-related apparatus structure of the solution of the present invention, and omitted other details little with relation of the present invention.
As mentioned in background technology, neighboring cell search generally includes two stages.In the second stage of neighboring cell search, conventionally adopt relevant detection to detect SSCH.Wherein, use the first stage to detect the PSS obtaining PSCH is carried out to channel estimating the channel estimating using the channel estimation results of this PSCH as SSCH.
For example, Fig. 1 shows the indicative flowchart that obtains the method for auxiliary synchronizing information of the prior art.
As can see from Figure 1, in step 110, utilize candidate's main synchronizing information to generate master sync signal PSS, wherein this main synchronizing information comprises PSS ID and slot timing, in LTE system, this slot timing is for example 5ms slot timing.
In step 120, the signal R of the master sync signal PSS based on generating and the PSCH through frequency domain filtering receiving
pSCHpSCH is carried out to channel estimating.
In step 130, the channel estimating of the PSCH based on obtaining in step 120
signal R with the SSCH through frequency domain filtering receiving
sSCHdetermine auxiliary synchronizing information, wherein this auxiliary synchronizing information comprises cell group identification Group ID, and circulating prefix-length CP_type and frame are regularly.As can see from Figure 1, in order to determine auxiliary synchronizing information, channel estimating that can be based on PSCH
with signal R
sSCHbe concerned with and detect tentatively to obtain candidate's auxiliary synchronous signals SSS, and the correlation of the SSS based on these candidates and theoretic each SSS carrys out computing metric in step 150, last in step 160 the auxiliary synchronizing information of relatively carrying out finally to determine candidate of availability value and predetermined threshold value.
It should be noted that, in order to reduce random disturbances, improve signal to noise ratio, PSCH channel estimating in can repeatedly carry out step 120 to the reception signal of continuous a plurality of time slots and/or a plurality of antennas and the relevant detection in step 130 by the result of detection add up (step 170), this dots in Fig. 1, wherein N
rthe number that represents antenna.
Finally, output candidate's synchronizing information, this synchronizing information comprises main synchronizing information and auxiliary synchronizing information.
Inventor notices, owing to there are differences between PSCH and SSCH, this relevant detection can bring performance loss, and especially, under tdd frame structure and High-speed Circumstance, performance loss is obvious especially.Another more common application scenarios is different-frequency measure.Measurement space (Gap) based on 5ms while carrying out neighboring cell search under different-frequency measure scene, and PSCH and the interval between SSCH at this, measured in space may be larger, so the difference between them also may be brought performance loss.Although also may adopt incoherent detection algorithm, such as difference correlation is relevant with part, these incoherent detection algorithms can bring the loss of signal to noise ratio (SNR).
the first embodiment
As mentioned above, exactly because there are differences between PSCH and SSCH, so utilize the channel estimation results of PSCH to obtain auxiliary synchronizing information, will inevitably cause error, and in the situation that the difference between PSCH and SSCH is larger, this error is more obvious.Therefore,, in order to overcome this defect, the present invention proposes a kind of method of obtaining improved auxiliary synchronizing information.
Fig. 2 shows the flow chart that obtains the method for improved auxiliary synchronizing information according to an embodiment of the invention.
In step S210, utilize main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals.One skilled in the art will appreciate that in the situation that learning main synchronizing information PSS sign and slot timing and auxiliary synchronizing information CP length, frame timing and cell group identification, can generate the auxiliary synchronous signals SSS corresponding with this main synchronizing information and auxiliary synchronizing information.It should be noted that, this main synchronizing information and auxiliary synchronizing information can be to be generated by additive method step above, or also can for example by user, be inputted from outside input, etc.
In step S220, the auxiliary synchronous signals SSS based on generating estimates auxiliary synchronization channel SSCH, thus the channel response of the estimation of acquisition SSCH.For auxiliary synchronization channel is estimated, can use several different methods.At this, for the purpose of illustrating, to each subcarrier of auxiliary synchronization channel, utilize least square (LS) channel estimation methods to obtain the estimated result of auxiliary synchronization channel SSCH.For example, for k subcarrier of the signal receiving on SSCH channel, its channel estimating can be calculated by following formula:
R wherein
sSCH(k) be the signal receiving on k the subcarrier of SSCH, d
i *(k) be k element d of corresponding i candidate SSS signal
i(k) conjugation.For current LTE system, k=0 for example, 1 ..., 61.
The impact bringing in order to eliminate as far as possible noise, preferably, averages the estimated result of described auxiliary synchronization channel for a plurality of subcarriers of auxiliary synchronization channel, thereby obtains improved estimated result.
For example, can carry out by following formula the channel estimating of computed improved:
K wherein
l=min{k, N
ave, k
h=min{61-k, N
ave, and 2 * N
aveequal can be used for the maximum number of average subcarrier.In above formula, owing to also having utilized the individual sub-carrier wave of k k around
l+ k
hthe estimated result of the auxiliary synchronization channel of individual subcarrier is estimated the auxiliary synchronization channel of k subcarrier, thereby has reduced noise effect.Preferably, can further improve (2) formula, to the estimated result of the auxiliary synchronization channel of each subcarrier, give different weights as the case may be, thereby obtain improved estimated result.
After obtaining the estimated result of auxiliary synchronization channel SSCH, in step S230 based on the estimated result of auxiliary synchronization channel SSCH is detected to auxiliary synchronizing information, thereby determine improved auxiliary synchronizing information.
Owing to having utilized in the method the estimated result of SSCH rather than the estimated result of PSCH to detect auxiliary synchronizing information, therefore the estimated result that has overcome the PSCH of utilization of the prior art detects the larger defect of auxiliary synchronizing information time error, has advantageously improved testing result.
Fig. 3 further shows the details of the step S230 of the auxiliary synchronizing information of detection in the method shown in Fig. 2.
In step S2301 first based on to the estimated result of auxiliary synchronization channel to the detection that is concerned with of the reception signal of auxiliary synchronization channel, thereby obtain relevant detection signal.By relevant, calculate, in this relevant detection signal, eliminated the impact of auxiliary synchronization channel.
For example, can calculate relevant detection signal with following formula:
R wherein
sSCH(k) be the signal receiving on k the subcarrier of SSCH, it is identical with the reception signal using in (1) formula.
it is the channel estimation results for the auxiliary synchronization channel SSCH of k subcarrier
conjugation.
In order further to eliminate the impact of noise effect and random fluctuation, preferably, for continuous a plurality of time slots, repeat relevant detection, and/or repeat relevant detection for the reception signal of a plurality of antennas, and by the corresponding relevant testing result obtaining
add up, thus the relevant testing result being improved
In step S2303 subsequently, the relevant detection signal obtaining in the auxiliary synchronous signals based on obtaining in step S210 and step S2301 carries out cross-correlation to obtain cross correlation value, and calculates corresponding metric based on cross correlation value.
For example, for i candidate's SSS, can for the even subcarrier SSCH1 in SSCH and strange subcarrier SSCH2, carry out descrambling and associative operation respectively, thereby obtain corresponding correlated results C
1, iand C
2, i.For this reason, for example can utilize fast hadamard transform conventional in this area to realize fast correlation operation.About concrete computational process, belong to technology well known to those skilled in the art, introduce no longer in detail here.
Afterwards, according to the correlation C of the SSCH1 obtaining and SSCH2
1, iand C
2, idetermine associating correlation.Associating correlation can obtain by several different methods, for example, can utilize following formula to obtain associating correlation | C
i|, be also about to C
1, iconjugation and C
2, ithe real part of the result that obtains of multiplying each other is asked absolute value, using this absolute value as associating correlation:
|C
i|＝|Re{C
* 1，i·C
2，i}| (4)
Can utilize this associating correlation | C
i| as the metric of auxiliary synchronizing information corresponding to i candidate's SSS signal.Yet preferably, calculate the mean value C of the cross correlation value of the relevant detection signal obtaining in a plurality of or whole auxiliary synchronous signals and relevant detecting step
ave, i, and the ratio degree of certainty value based on described cross correlation value and mean value.
For example, can utilize the result C of following formula
ratio, imetric as auxiliary synchronizing information corresponding to i candidate's SSS signal:
Here it should be noted that, those skilled in the art can determine different metrics by several different methods as required, and do not affect essence of the present invention.
After obtaining metric, in step S2305, according to metric, determine improved auxiliary synchronizing information.For this reason, obtained metric and predetermined threshold T H can be compared, if metric is greater than (may be to be also less than according to the selection of metric) threshold T H, auxiliary synchronizing information corresponding to corresponding auxiliary synchronous signals is defined as to the auxiliary synchronizing information of improved candidate.
For the sake of clarity, figure 4 illustrates the flow chart of the method for obtaining according to an embodiment of the invention improved synchronizing information, wherein combine the method step in Fig. 2 and Fig. 3.
Square frame 410, corresponding to the step S210 in Fig. 2, wherein utilizes main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals SSS.
Square frame 420, corresponding to the step S220 in Fig. 2, wherein utilizes the auxiliary synchronous signals SSS generating and the signal R receiving
sSCHcarry out the estimation of auxiliary synchronization channel SSCH.
Square frame 430 is corresponding to the step S230 in Fig. 2, wherein the estimated result based on auxiliary synchronization channel and the signal R that receives
sSCHdetermine improved candidate's auxiliary synchronizing information.Wherein square frame 440, corresponding to the step S2301 in Fig. 3, utilizes the estimated result of auxiliary synchronization channel and the signal R receiving
sSCHthe detection that is concerned with, to eliminate channel effect.Square frame 450 and 460 subsequently corresponds respectively to step S2303 and the S2305 in Fig. 3, for computation measure and definite auxiliary synchronizing information.
For example, owing to may (being assumed to N in Fig. 4 with the signal that a plurality of reception antennas receive auxiliary synchronization channel
rindividual), so as can see from Figure 4 respectively to this N
rthe signal of individual antenna reception has carried out corresponding calculating (dotting), and adds up in square frame 470.It should be noted that, here cumulative equally also can comprise a plurality of continuous time slots are added up except adding up for a plurality of antennas, as described above.
Because the estimated result based on auxiliary synchronization channel itself is in the method to the auxiliary synchronous signals the receiving detection that is concerned with, therefore obviously improved the accuracy of the information of final determined candidate's auxiliary synchronous signals.
the second embodiment
According to a second embodiment of the present invention, a kind of improved neighboring cell search method has been proposed.
Fig. 5 shows the flow chart of neighboring cell search method according to an embodiment of the invention.
In step S510, based on master sync signal PSS, obtain main synchronizing information.This step is corresponding to the included first stage of neighboring cell search of the LTE system of the prior art of having mentioned above.In the first stage, by the blind Detecting of primary synchronization channel PSCH is obtained to main synchronizing information, this main synchronizing information for example comprises master sync signal sign PSS ID and slot timing (5ms Timing Synchronization).But the specific implementation of this step S510 is not limited to any specific prior art, is even also not limited to prior art, and it can be any technology that can obtain main synchronizing information now or in the future.
In step S520, utilize main synchronizing information to obtain auxiliary synchronizing information.This step is corresponding to the second stage of aforementioned neighboring cell search of the prior art.In second stage, based on the first stage, detect the main synchronizing information obtaining, auxiliary synchronization channel SSCH is detected and obtains auxiliary synchronizing information, this auxiliary synchronizing information for example comprises cell group identification Group ID, circulating prefix-length CP_type and frame are regularly.About the particular content of this step, can be referring to part described in conjunction with Figure 1, here no longer repetition above.But the specific implementation of this step S520 is not limited to this, and it can be any technology that can obtain auxiliary synchronizing information now or in the future.
Subsequently, in step S530, the main synchronizing information based on obtaining above and auxiliary synchronizing information, utilize auxiliary synchronous signals to obtain improved auxiliary synchronizing information.About specifically how obtaining the content of improved auxiliary synchronizing information, can, referring to the second embodiment above, no longer repeat here.
Owing to further having improved the auxiliary synchronizing information of obtaining in step S530, therefore improved the accuracy of neighboring cell search.
the 3rd embodiment
Corresponding to the method for the first embodiment, a third embodiment in accordance with the invention, has proposed a kind of device that obtains improved auxiliary synchronizing information.
Fig. 6 shows the schematic diagram of the device that obtains according to an embodiment of the invention improved auxiliary synchronizing information.
As we can see from the figure, this device comprises auxiliary synchronous signals maker 610, auxiliary synchronous signals estimator 620 and auxiliary synchronizing information detector 630.
Auxiliary synchronous signals maker 610 is arranged to and utilizes main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals.One skilled in the art will appreciate that in the situation that learning main synchronizing information PSS sign and slot timing and auxiliary synchronizing information CP length, frame timing and cell group identification, can generate the auxiliary synchronous signals SSS corresponding with this main synchronizing information and auxiliary synchronizing information.It should be noted that, this main synchronizing information and auxiliary synchronizing information can be generated by additive method step, or also can for example by user, be inputted from outside input, etc.
The auxiliary synchronous signals SSS that auxiliary synchronous signals estimator 620 is arranged to based on generating estimates auxiliary synchronization channel SSCH, thus the channel response of the estimation of acquisition SSCH.One skilled in the art will appreciate that and can estimate channel by several different methods, for example, can utilize LS channel estimation method to obtain the estimated result of auxiliary synchronization channel SSCH to each subcarrier of auxiliary synchronization channel.
The impact bringing in order to eliminate as far as possible noise, preferably, averages the estimated result of described auxiliary synchronization channel for a plurality of subcarriers of auxiliary synchronization channel, thereby obtains improved estimated result.In addition, as mentioned above, can to the estimated result of the auxiliary synchronization channel of each subcarrier, give different weights as the case may be, thereby obtain improved estimated result.
Auxiliary synchronizing information detector 630 is arranged to based on the estimated result of auxiliary synchronization channel SSCH is detected to auxiliary synchronizing information, thereby determines improved auxiliary synchronizing information.
Because having utilized the estimated result of SSCH rather than the estimated result of PSCH, this device detects auxiliary synchronizing information, therefore the estimated result that has overcome the PSCH of utilization of the prior art detects the larger defect of auxiliary synchronizing information time error, has advantageously improved testing result.
Fig. 7 shows the details of the auxiliary synchronizing information detector 630 in Fig. 6.
As we can see from the figure, auxiliary synchronizing information detector 630 comprises coherent detector 6301, metric calculator 6303 and auxiliary synchronizing information determiner 6305.
Coherent detector 6301 be arranged to based on to the estimated result of auxiliary synchronization channel to the detection that is concerned with of the reception signal of auxiliary synchronization channel, thereby obtain relevant detection signal.By relevant, calculate, in this relevant detection signal, eliminated the impact of auxiliary synchronization channel.
In order further to eliminate the impact of noise effect and random fluctuation, preferably, for continuous a plurality of time slots, repeat relevant detection, and/or repeat relevant detection for the reception signal of a plurality of antennas, and the corresponding relevant testing result obtaining is added up, thereby the relevant testing result being improved.
Metric calculator 6303 is arranged to the relevant detection signal that the auxiliary synchronous signals that generates based on auxiliary synchronous signals maker 610 and coherent detector 6301 obtain and carries out cross-correlation to obtain cross correlation value, and calculates corresponding metric based on cross correlation value.Concrete calculating about metric can, referring to corresponding method step, no longer repeat here.
It should be noted that, those skilled in the art can determine different metrics by several different methods as required, do not affect essence of the present invention.
Auxiliary synchronizing information determiner 6305 is arranged to according to metric determines improved auxiliary synchronizing information.For this reason, obtained metric and predetermined threshold T H can be compared, if metric is greater than (may be to be also less than according to the selection of metric) threshold T H, auxiliary synchronizing information corresponding to corresponding auxiliary synchronous signals is defined as to the auxiliary synchronizing information of improved candidate.
Because the estimated result of this device based on auxiliary synchronization channel itself is to the auxiliary synchronous signals the receiving detection that is concerned with, therefore obviously improved the accuracy of the information of final determined candidate's auxiliary synchronous signals.
the 4th embodiment
Fig. 8 shows the system block diagram of wireless receiver according to an embodiment of the invention.Comprising radio frequency part, AD conversion unit, low-pass filtering and downsampling unit, fast Fourier transform unit, main synchronizing information getter 810 and the first auxiliary synchronizing information getter 820, it is module well-known to those skilled in the art.Wherein main synchronizing information getter 810 is arranged to based on master sync signal and obtains main synchronizing information.The first auxiliary synchronizing information getter 820 is arranged to and utilizes main synchronizing information to obtain auxiliary synchronizing information, and it specifically comprises main synchronizing information maker, channel estimator and auxiliary synchronizing information detector.The function of the modules in the first auxiliary synchronizing information getter 820 can be correspondingly referring to content described in conjunction with Figure 1, here no longer repetition above.
As can see from Figure 8, this wireless receiver also comprises the second auxiliary synchronizing information getter 830, and it is arranged to based on described main synchronizing information and auxiliary synchronizing information and utilizes auxiliary synchronous signals to obtain improved auxiliary synchronizing information.The second auxiliary synchronizing information getter 830 further comprises auxiliary synchronous signals maker 8301, auxiliary synchronous signals estimator 8303 and auxiliary synchronizing information detector 8305.About the concrete function of these unit, can, referring to above in conjunction with Fig. 6 and the described content of Fig. 7, no longer repeat here.
From Fig. 8, easily see, by utilizing according to neighboring cell search device of the present invention, on the basis of the synchronizing information of obtaining in prior art, further improved the auxiliary synchronizing information of obtaining, therefore improved the accuracy of neighboring cell search.
Finally, also it should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.In addition, the in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Although describe by reference to the accompanying drawings above embodiments of the invention in detail, it should be understood that execution mode described above is just for the present invention is described, and be not construed as limiting the invention.For a person skilled in the art, can make various changes and modifications and not deviate from the spirit and scope of the invention above-mentioned execution mode.Therefore, scope of the present invention is only limited by appended claim and equivalents thereof.
By above description, be not difficult to find out, according to embodiments of the invention, provide following scheme:
1. 1 kinds of methods of obtaining improved auxiliary synchronizing information of remarks, comprising:
-utilize main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals;
-auxiliary synchronous signals based on generating is estimated auxiliary synchronization channel; And
-based on the estimated result of auxiliary synchronization channel is detected to auxiliary synchronizing information, thus determine improved auxiliary synchronizing information.
Remarks 2., according to the method described in remarks 1, wherein detects auxiliary synchronizing information and comprises:
-based on to the estimated result of auxiliary synchronization channel to the detection that is concerned with of the reception signal of auxiliary synchronization channel, thereby obtain relevant detection signal;
-based on auxiliary synchronous signals, generating the relevant detection signal obtaining in the auxiliary synchronous signals that obtains in step and relevant detecting step carries out cross-correlation to obtain cross correlation value, and calculate corresponding metric based on cross correlation value; And
-according to metric, determine improved auxiliary synchronizing information.
Remarks 3. is according to the method described in remarks 1, and wherein main synchronizing information comprises: master sync signal sign and slot timing.
Remarks 4. is according to the method described in remarks 1, and wherein auxiliary synchronizing information comprises circulating prefix-length, frame regularly and cell group identification.
Remarks 5. is according to the method described in remarks 2, wherein detect after auxiliary synchronous signals information is further included in the reception signal of continuous a plurality of time slots and/or a plurality of antennas is repeated to the operation of relevant detecting step, the relevant detection signal obtaining is added up accordingly.
Remarks 6., according to the method described in remarks 1, wherein, when estimating auxiliary synchronization channel, utilizes LS channel estimation method to obtain the estimated result of auxiliary synchronization channel to each subcarrier of auxiliary synchronization channel.
Remarks 7., according to the method described in remarks 6, wherein, when estimating auxiliary synchronization channel, is asked weighted average for a plurality of subcarriers of auxiliary synchronization channel by the estimated result of described auxiliary synchronization channel, thereby is obtained improved estimated result.
Remarks 8., according to the method described in remarks 2, wherein, when computation measure, calculates the mean value of a plurality of or whole auxiliary synchronous signals and the cross correlation value of the relevant detection signal obtaining, and the ratio degree of certainty value based on described cross correlation value and mean value.
9. 1 kinds of neighboring cell search methods of remarks, comprising:
-based on master sync signal, obtain main synchronizing information;
-utilize main synchronizing information to obtain auxiliary synchronizing information; And
-based on described main synchronizing information and auxiliary synchronizing information, utilize auxiliary synchronous signals to obtain improved auxiliary synchronizing information.
Remarks 10., according to the method described in remarks 9, wherein, when obtaining described improved auxiliary synchronizing information, is implemented according to the method described in any one in remarks 1 to 8.
11. 1 kinds of devices that obtain improved auxiliary synchronizing information of remarks, comprising:
-auxiliary synchronous signals maker (610), it is arranged to and utilizes main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals;
-auxiliary synchronization channel estimator (620), its auxiliary synchronous signals being arranged to based on generating is estimated auxiliary synchronization channel; And
-auxiliary synchronizing information detector (630), it is arranged to based on the estimated result of auxiliary synchronization channel is detected to auxiliary synchronizing information, thereby determines improved auxiliary synchronizing information.
Remarks 12. is according to the device described in remarks 11, and wherein said auxiliary synchronous signals information detector (630) comprising:
-coherent detector (6301), its be arranged to based on to the estimated result of auxiliary synchronization channel to the detection that is concerned with of the reception signal of auxiliary synchronization channel, thereby obtain relevant detection signal; And
-metric calculator (6303), it is arranged to the relevant detection signal that the auxiliary synchronous signals that generates based on auxiliary synchronous signals maker (610) and coherent detector (6301) obtain and carries out cross-correlation to obtain cross correlation value, and calculates corresponding metric based on cross correlation value; And
-auxiliary synchronizing information determiner (6305), it is arranged to according to metric determines improved auxiliary synchronizing information.
Remarks 13. is according to the device described in remarks 11, and wherein main synchronizing information comprises: master sync signal sign and slot timing.
Remarks 14. is according to the device described in remarks 11, and wherein auxiliary synchronizing information comprises circulating prefix-length, frame regularly and cell group identification.
Remarks 15. is according to the device described in remarks 12, wherein said auxiliary synchronous signals information detector (630) also comprises accumulator, and it is arranged to correspondingly add up the reception signal of continuous a plurality of time slots and/or a plurality of antennas is repeated to the relevant detection signal that the relevant operation detecting obtains.
Remarks 16. is according to the device described in remarks 11, and wherein auxiliary synchronization channel estimator (620) is arranged to and utilizes LS channel estimation method to obtain the estimated result of auxiliary synchronization channel to each subcarrier of auxiliary synchronization channel.
Remarks 17. is according to the device described in remarks 16, and wherein auxiliary synchronization channel estimator (620) is arranged to for a plurality of subcarriers of auxiliary synchronization channel the estimated result of described auxiliary synchronization channel is asked to weighted average, thereby obtains improved estimated result.
Remarks 18. is according to the device described in remarks 12, wherein metric calculator (6303) is arranged to the mean value of the cross correlation value that calculates the relevant detection signal obtaining in a plurality of or whole auxiliary synchronous signals and relevant detecting step, and the ratio degree of certainty value based on described cross correlation value and mean value.
19. 1 kinds of neighboring cell search devices of remarks, comprising:
-main synchronizing information getter (810), it is arranged to based on master sync signal and obtains main synchronizing information;
The-the first auxiliary synchronizing information getter (820), it is arranged to and utilizes main synchronizing information to obtain auxiliary synchronizing information; And
The-the second auxiliary synchronizing information getter (830), it is arranged to based on described main synchronizing information and auxiliary synchronizing information and utilizes auxiliary synchronous signals to obtain improved auxiliary synchronizing information.
Remarks 20. is according to the device described in remarks 19, and wherein the second auxiliary synchronizing information getter (830) is according to the device described in any one in remarks 11 to 18.
Claims (9)
1. obtain a method for improved auxiliary synchronizing information, be included in wireless receiver place and carry out the following step:
-utilize main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals;
-auxiliary synchronous signals based on generating is estimated auxiliary synchronization channel; And
-based on the estimated result of auxiliary synchronization channel is detected to auxiliary synchronizing information, thus determine improved auxiliary synchronizing information,
Wherein, based on being detected to auxiliary synchronizing information, the estimated result of auxiliary synchronization channel comprises:
-based on to the estimated result of auxiliary synchronization channel to the detection that is concerned with of the reception signal of auxiliary synchronization channel, thereby obtain relevant detection signal;
-the auxiliary synchronous signals based on generating and the relevant detection signal obtaining carry out cross-correlation to obtain cross correlation value, and calculate corresponding metric based on cross correlation value; And
-according to metric, determine improved auxiliary synchronizing information.
2. the device that obtains improved auxiliary synchronizing information in wireless receiver, comprising:
-auxiliary synchronous signals maker (610), it is arranged to and utilizes main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals;
-auxiliary synchronization channel estimator (620), its auxiliary synchronous signals being arranged to based on generating is estimated auxiliary synchronization channel; And
-auxiliary synchronizing information detector (630), it is arranged to based on the estimated result of auxiliary synchronization channel is detected to auxiliary synchronizing information, thereby determines improved auxiliary synchronizing information,
Wherein, described auxiliary synchronous signals information detector (630) comprising:
-coherent detector (6301), its be arranged to based on to the estimated result of auxiliary synchronization channel to the detection that is concerned with of the reception signal of auxiliary synchronization channel, thereby obtain relevant detection signal;
-metric calculator (6303), it is arranged to the relevant detection signal that the auxiliary synchronous signals that generates based on auxiliary synchronous signals maker (610) and coherent detector (6301) obtain and carries out cross-correlation to obtain cross correlation value, and calculates corresponding metric based on cross correlation value; And
-auxiliary synchronizing information determiner (6305), it is arranged to according to metric determines improved auxiliary synchronizing information.
3. device according to claim 2, wherein main synchronizing information comprises: master sync signal sign and slot timing.
4. device according to claim 2, wherein auxiliary synchronizing information comprises circulating prefix-length, frame regularly and cell group identification.
5. device according to claim 2, wherein said auxiliary synchronous signals information detector (630) also comprises accumulator, and it is arranged to correspondingly add up the reception signal of continuous a plurality of time slots and/or a plurality of antennas is repeated to the relevant detection signal that the relevant operation detecting obtains.
6. device according to claim 2, wherein auxiliary synchronization channel estimator (620) is arranged to for a plurality of subcarriers of auxiliary synchronization channel the estimated result of described auxiliary synchronization channel is asked to weighted average, thereby obtains improved estimated result.
7. device according to claim 2, wherein metric calculator (6303) is arranged to the mean value of the cross correlation value that calculates the relevant detection signal obtaining in a plurality of or whole auxiliary synchronous signals and relevant detecting step, and the ratio degree of certainty value based on described cross correlation value and mean value.
8. the neighboring cell search device in wireless receiver, comprising:
-main synchronizing information getter (810), it is arranged to based on master sync signal and obtains main synchronizing information;
The-the first auxiliary synchronizing information getter (820), it is arranged to and utilizes main synchronizing information to obtain auxiliary synchronizing information; And
The-the second auxiliary synchronizing information getter (830), it is arranged to based on described main synchronizing information and auxiliary synchronizing information and utilizes auxiliary synchronous signals to obtain improved auxiliary synchronizing information,
Wherein, described the second auxiliary synchronous signals information detector (830) comprising:
-auxiliary synchronous signals maker, it is arranged to and utilizes main synchronizing information and auxiliary synchronizing information to generate auxiliary synchronous signals;
-auxiliary synchronization channel estimator, its auxiliary synchronous signals being arranged to based on generating is estimated auxiliary synchronization channel; And
-auxiliary synchronizing information detector, it is arranged to based on the estimated result of auxiliary synchronization channel is detected to auxiliary synchronizing information, thereby determines improved auxiliary synchronizing information,
Wherein, described auxiliary synchronizing information detector comprises:
-coherent detector, its be arranged to based on to the estimated result of auxiliary synchronization channel to the detection that is concerned with of the reception signal of auxiliary synchronization channel, thereby obtain relevant detection signal;
-metric calculator, it is arranged to the relevant detection signal that the auxiliary synchronous signals that generates based on auxiliary synchronous signals maker and coherent detector obtain and carries out cross-correlation to obtain cross correlation value, and calculates corresponding metric based on cross correlation value; And
-auxiliary synchronizing information determiner, it is arranged to according to metric determines improved auxiliary synchronizing information.
9. device according to claim 8, wherein the second auxiliary synchronizing information getter (830) is according to the device described in any one in claim 2 to 7.
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