CN1529525A - Device and method for detecting defined frame synchronization of channel contour window - Google Patents
Device and method for detecting defined frame synchronization of channel contour window Download PDFInfo
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- CN1529525A CN1529525A CNA2003101003193A CN200310100319A CN1529525A CN 1529525 A CN1529525 A CN 1529525A CN A2003101003193 A CNA2003101003193 A CN A2003101003193A CN 200310100319 A CN200310100319 A CN 200310100319A CN 1529525 A CN1529525 A CN 1529525A
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Abstract
The invention discloses device and method for determining frame synchronization more correctly, raising performance of frame synchronization greatly. The device includes a reference signal generator, a correlator, a power calculator, a detector of channel outline window, a detector for ultra-value within window, a selector of effective router component, and a synchronization router arbitrator etc. Through testing channel outline window (including all energy of effective routers), the invention searches out first effective router component in window, and makes synchronization with it.
Description
Technical field
The invention belongs to field of wireless communications systems, particularly relate to a kind of checkout gear and method of in wireless communication system, determining frame synchronization.
Background technology
In recent years, the mobile communication development was very swift and violent, and mobile communication subscriber quantity is increasing exponentially, and especially Zhong Guo mobile subscriber is increasing with the speed more than 150% over the years always.The user is also more and more higher to the speed and the quality requirement of communication.
In wireless communication system, the frame of the data flow that receiver must be sent with transmitter keeps can carrying out synchronously next step transfer of data.How can determine the original position of frame fast and effectively and obtain frame synchronization is the key component that moving communicating field is directly connected to communication speed and quality.Generally, fairly simple and generally acknowledged frame synchornization method is to adopt the synchronization code word method, by the special processing process in the transmitter ad-hoc location (generally being the beginning of a frame) that the frame synchronization code word is inserted in the frame is transmitted as the part of frame structure, receiver is searched for synchronization code word continuously in data flow, can finish (choosing largest peaks usually) with the peak value of correlator (or matched filter) detection correlation, the position of correlation peaks correspondence is exactly the position of detected synchronization code word, once detect the original position that this synchronization code word has just been determined frame, thereby obtain frame synchronization.In practical communication system, signal arrives receiving terminal from transmitting terminal through different reflection paths, forms multipath signal.The different propagation paths of multipath signal can cause different propagation delays, i.e. multipath effect.Provided the power-time delay figure of a multipath channel as Fig. 1, wherein, comprised three remarkable different paths in the multipath signal, hereinafter referred to as the effective diameter component.This shows that the peak value of the relevant peaks in the real system is not unique, even may have several very little peak values that differ, so finish the loss that synchronous method may cause many useful informations with the detection correlation peaks.For example, the corresponding position of effective diameter component 2 in Fig. 1 (main footpath, i.e. peak-peak) is exactly the sync bit that detects the relevant peaks peak value, and it will cause the omission of the information of effective diameter component 1.In order to overcome the performance that the problems referred to above also can improve frame synchronization, the present invention proposes a kind of apparatus and method of determining frame synchronization by the method for channel profile window.
Summary of the invention
The objective of the invention is to improve the frame synchronization performance in the wireless communication system and can accurately determine the method for frame synchronization position.
Basic skills of the present invention is at first to detect channel profile window (promptly comprise most multipath energies, comprise the time window of all effective diameter energy), finds first effective diameter component and synchronous with it then in this window.With Fig. 1 is example, the present invention is defined as channel profile window with the window (window length is W) that comprises the energy of all channel effective diameters among power-time delay figure, detect earlier and determine channel profile window, determine first effective diameter component in the channel profile window again, be effective diameter component 1, thus with effective diameter component 1 pairing position synchronous.
Its concrete method comprises the steps:
Step 1, correlator are carried out related operation by the synchronization code sequence of exporting in the signal that receives and the reference signal generator and are obtained the plural correlated results sequence that a length is N, then plural correlated results sequence is input in the power calculator, asks mould square (or mould) computing to obtain the related power value to correlated results by power calculator; The value of resulting related power is input in the channel profile window detector, the length of channel profile window is by default, the window of this length moves in the scope of whole related power value, the step-length that moves is variable, obtain several windows, if with window length is W, moving step length S is that 1 chip is an example, the M that an obtains window, M (M=(N-W)/S+1) wherein, calculate related power in all M window add up and, channel profile window detector filters out therefrom that power adds up and peaked window, this window is exactly a channel profile window.
Step 2, the result that channel profile window detector is detected is input in the window and is worth in the detector most, being worth most detector in the window travels through related power value in the whole channel profile window and finds several maximum power values and write down its relevant power and corresponding position, for example shown in Figure 4, be worth most detector in the window and detect the individual prominent performance number of K (for example K=4), the result is input in the effective diameter selector then, the effective diameter selector screens K the maximum power value that is worth most detector in the window and imports, and selects effective footpath component and writes down its performance number and corresponding position.
Step 3, synchronous footpath decision device are searched the effective diameter of effective diameter selector input, find the position (being first effective diameter component) in the most forward footpath, position.
The position synchronous of step 4, first effective diameter component of finding with synchronous footpath decision device.
Determine the method for frame synchronization according to above-mentioned channel profile window detection method, it is characterized in that: described effective diameter selector is realized selection function by a noise power calculation device and a threshold judgement device one, and wherein said noise power calculation device calculates corresponding noise power according to the performance number that is worth most K maximum of detector input in the value of all related powers of power calculator input and the window.The computational process of concrete noise power is at first to be worth most the related power value that detector is exported in the filter windows in all related power values, then remaining related power is averaged, and this value promptly is the estimated value of noise power-value.Described threshold judgement device one is according to the estimated value (hereinafter referred noise power-value) of the noise power of noise power calculation device input, be worth most the detected K of detector maximum performance number in the window, can rule out the effective diameter component in the channel and write down its position.Wherein concrete judgement formula is as follows:
| P
i-P
Noise|＞T
1I=1,2,3 ..., K (1) is P here
iBe i performance number, P
NoiseNoise power-value, T
1It is threshold value 1.If being worth the condition that the detected K of a detector maximum power value satisfies the signal-noise ratio threshold in the above-mentioned formula (1) in the window most just is judged as the effective diameter component and writes down its corresponding position.
Determine to it is characterized in that the method for frame synchronization according to above-mentioned channel profile window detection method: effective diameter component selector is realized selection functions by a threshold judgement device two, and its judgement formula is as follows:
| P
Max-P
i|＜T
2I=1,2,3 ..., K (2) is P here
iBe i performance number, P
MaxThe main footpath here is to be worth K of the detector output maximum (just main performance number directly) in the value, T in the window most
2It is threshold value 2.Described threshold judgement device two is compared with main performance number directly according to being worth most K the maximum power value that go out that detector detects, and judges that its absolute difference just can be judged as the effective diameter component and write down its corresponding position less than formula (2) threshold condition.
Determine to it is characterized in that the method for frame synchronization according to above-mentioned channel profile window detection method: effective diameter component selector is by a noise power calculation device, and a threshold judgement device one and a threshold judgement device two are realized selection functions.Described noise power calculation device is identical with threshold judgement device one with the noise power calculation device of the above-mentioned effective diameter component selector of mentioning with described threshold judgement device one, its judgment condition is also identical, described threshold judgement device two is identical with the threshold judgement device two of the above-mentioned effective diameter component selector of mentioning, and its judgment condition is also identical; When satisfying the condition of above-mentioned two kinds of threshold judgement devices simultaneously, just can be judged out the effective diameter component and write down out corresponding position.
Determine the device of frame synchronization to it is characterized in that it comprises: a correlator, a reference signal generator according to channel profile window detection method of the present invention, one power calculator, a channel profile window detector, an effective diameter component selector, be worth most detector in one window, a synchronous footpath decision device; Described reference signal generator produces the corresponding synchronous sign indicating number by receiver; Described correlator carries out related operation with the data of reception and the data of reference signal generator output, and be the plural correlated results of N by output length in the correlator this moment; Described power calculator, the result that described correlator is imported asks mould square (or mould) computing to obtain the related power value, and the size of this value can reflect the intensity in each footpath; Described channel profile window detector, be that window (window length is by default) with regular length moves in the scope of whole related power value, the step-length that moves is variable, obtain several windows, and in the calculating exit window all related power add up and, thereby find out prominent window, i.e. channel profile window; Be worth most detector in the described window, in channel profile window, find several maximum performance numbers successively, (maximum power value K=4 as shown in Figure 4), the related power value and the corresponding position of writing down them are entered in the effective diameter component selector then; Described effective diameter component selector can screen the performance number of the K that finds in window maximum according to the result who is worth most the detector input in the result of power calculator input and the window, selects effective footpath component; The footpath decision device finds the most forward footpath, position in the component of a plurality of footpaths synchronously, and this directly is exactly that the present invention requires first effective diameter component, and its position is exactly the sync bit that finds.
Determine the device of frame synchronization to it is characterized in that it also comprises: a position bigness scale device, a delay controller and a data pick-up device according to channel profile window detection method of the present invention; Wherein, the data of reception are at first measured the position that data are sent roughly by described position bigness scale device; Described delay controller is controlled the position that described data pick-up device extracts data according to the positional information that the rough measure data are measured; Described data pick-up device, output result according to delay controller, extract the data of a segment length, the scope that the data that this section is extracted can extract is according to the cellular system radius of society, in the presetting ranges such as antenna configurations, will send certainly in the data of this section extraction the data segment of synchronous code be included in.
Determine to be further characterized in that the device of frame synchronization according to above-mentioned channel profile window detection method: described correlator can substitute with matched filter.
Determine the device of frame synchronization according to above-mentioned channel profile window detection method, be further characterized in that: described effective diameter component selector is made up of noise power calculation device and threshold judgement device one, described noise power calculation device, according to all related power values of correlator output and the multipath related power value that finds, calculate corresponding noise power; Described threshold judgement device one, adjudicate the condition of the judgement of whether satisfying thresholding according to the value that is worth most the input of detector and noise power calculation device in the window and judge the effective diameter component in the channel and write down its position, then the result is input in the decision device of synchronous footpath;
Determine the device of frame synchronization according to above-mentioned channel profile window detection method, be further characterized in that: described effective diameter component selector is made up of threshold judgement device two, the condition that described threshold judgement device two is adjudicated the judgement of whether satisfying thresholding according to the value that is worth most the detector input in the window is judged the effective diameter component in the channel and is write down its position, then the result is input in the decision device of synchronous footpath;
Determine the device of frame synchronization according to above-mentioned channel profile window detection method, be further characterized in that: described effective diameter component selector is made up of noise power calculation device and threshold judgement device one and threshold judgement device two, described noise power calculation device is identical with threshold judgement device one with the above-mentioned noise power calculation device of mentioning with threshold judgement device one, described threshold judgement device two is identical with the above-mentioned threshold judgement device of mentioning two, satisfy the judgment condition of threshold judgement device one and threshold judgement device two according to the result who is worth most the detector input in the window simultaneously and just can judge the effective diameter component in the channel and write down its position, the result is input in the decision device of synchronous footpath then.
Description of drawings
Figure 1 shows that the power-time delay schematic diagram of multipath channel.
Figure 2 shows that the TD-SCDMA frame structure schematic diagram among the embodiment.
Figure 3 shows that the structural representation of the DwPTS among the embodiment.
Figure 4 shows that the algorithm principle schematic diagram of embodiment.
Figure 5 shows that the structural representation that channel profile window detection method is determined the device of frame synchronization that is used for of the present invention.
Figure 6 shows that the effective diameter component selector implementation one among the present invention.
Figure 7 shows that the effective diameter component selector implementation two among the present invention.
Figure 8 shows that the effective diameter component selector implementation three among the present invention.
Figure 9 shows that the power features window construction figure among the embodiment.
Below in conjunction with accompanying drawing the channel profile window detection method that is used for of the present invention is determined that the devices and methods therefor of frame synchronization is described in detail.
Embodiment
The present invention is with the example that is applied as in the terminal use (UE) of TD SDMA (TD-SCDMA).
In the TD-SCDMA system, have only frame structure information to reach frame synchronization during the UE start, and receiver must keep just communicating synchronously with the frame structure of data flow, so necessary elder generation sets up and the down-going synchronous of sub-district with signal.
For can be clearer data send and receive in the explanation TD-SCDMA system process, now the frame structure of TD-SCDMA is done and is described.As shown in Figure 2, TD-SCDMA is to be the chronomere of a frame with 10ms.TD-SCDMA is owing to use intelligent antenna technology, need the position of (every 5ms) grasp user terminal at any time, therefore TD-SCDMA further divides each frame the subframe for two 5ms, thereby shortened the time in the cycle of up-downgoing each time, can in the short as far as possible time, finish location the user.The subframe of each TD-SCDMA is divided into 7 common time slots (TS0～TS6) and three special time slots: a descending pilot frequency time slot (DwPTS), a uplink pilot time slot (UpPTS) and a protection period (GP).The subframe of each 5ms is made up of 6400 chips (chips) altogether.In TD-SCDMA, the DwPTS in each subframe is descending pilot frequency and designing synchronously.The structure chart of DwPTS as shown in Figure 3; DwPTS is that the descending synchronous code (SYNC) of 64 chips (chip) and the protection period (GP) of 32 chips (chip) are formed by length; wherein SYCN is one group of pseudo noise code (PN); distribute to different sub-districts, be used for the sub-district search and descending synchronously.
When UE starts shooting, at first to determine the subdistrict position at the place of UE, the data that receive will realize that its basic principle is that power " feature window " shape that bigness scale device in DwPTS position utilizes the DwPTS of down link is searched for the approximate location of SYNC by the approximate location of DwPTS position bigness scale device search DwPTS.As shown in Figure 6, in the frame structure of TD-CDMA, SYNC sign indicating number section is 64 chip lengths, and there is the GP of 32 chips on the left side, and there is the GP of 96 chips on the right.Because the power of the GP that receives is very little, and SYNC sign indicating number segment data is with full power transmissions, so from the time analysis that distributes, the power of SYNC is compared with both sides GP, the SYNC section is " peak " value.When with the power of both sides 64 chips and (each 32 chip of every limit) divided by SYNC section power and the time, the value that obtains should be very little.When the method with the power features window traveled through whole reception data, the position of ratio minimum promptly was the position of DwPTS, and bigness scale device in DwPTS position can be judged the approximate location of SYNC thus.Can know the approximate location of DwPTS by the output result of DwPTS position bigness scale device, come the control data withdrawal device that the data of relevant position are extracted according to the positional information that rough measure goes out by delay controller.The data pick-up device extracts the data that relevant position length is L chip according to the output result of delay controller, as shown in Figure 4, because being the data pick-up device, the data of the length L that extracts extract according to the output result of DwPTS position bigness scale device and delay controller, the scope that requires during extraction to extract necessarily comprises UE place cellular system radius of society, in the presetting ranges such as antenna configurations, so the data that extracted comprise the SYNC segment data of 64 chips certainly.This position of determining DwPTS with the feature window is an approximate location just still, can't determine SYNC code character and position thereof accurately, describes the testing process of determining SYNC sign indicating number and position thereof with channel profile window now in detail.
In the data input correlator that the data pick-up device extracts, the dateout of reference signal generator is also imported in the correlator simultaneously, and reference signal generator produces corresponding SYNC sign indicating number by the sequence number of the SYNC sign indicating number that receiver is searched for as required.Correlator carries out related operation with the data in the data pick-up device of the data of reference signal generator input and reception, and it is output as the plural correlated results that length is N, and wherein said correlator also can substitute with matched filter.In the plural correlated results input power calculator by correlator output, power calculator asks mould square (or mould) computing to obtain the related power value to its result, and the size of this value can reflect the power of the intensity in each footpath.Result by power calculator output no longer has been a complex values, its result is input to respectively in channel profile window detector and the effective diameter component selector, with length is that (the channel profile window with 16 chip lengths is an example to W here, also can be made as other value) related power in whole related power value scope, move, moving step length be variable (for example, if moving step length S is 1 chip), can obtain M (the individual window of M=(N-W)/S+1) like this.Calculate related power in all M window add up and, and filter out therefrom that power adds up and peaked window, this window is exactly channel profile window (window that promptly comprises all energy).
The output of channel profile window detector is worth detector most in the input window as a result, be worth most detector in the window and in channel profile window, find K maximum performance number successively (as shown in Figure 4, K=4), write down their related power value and corresponding position, be entered into then in the effective diameter component selector, effective diameter component selector screens the performance number of the K that finds in window maximum according to the result who is worth most the detector input in the result of power calculator input and the window, selects effective footpath component.
Screening process to effective diameter component selector is further described now.As shown in Figure 5, effective diameter component selector can have three kinds of implementations, first kind of effective diameter component selector comprises a noise power calculation device and a threshold judgement device one, and wherein said noise power calculation device can calculate corresponding noise power according to the performance number that is worth most K maximum of detector input in the value of all related powers of power calculator input and the window.The computational process of concrete noise power is at first to be worth most the related power value that detector is exported in the filter windows in all related power values, then remaining related power is averaged, and this value promptly is a noise power-value.Described threshold judgement device one is worth the detected K of detector maximum performance number most according to the noise power-value of noise power calculation device input in the window, can rule out the effective diameter component in the channel and write down its position.Wherein concrete judgement formula is as follows:
| P
i-P
Noise|＞T
1I=1,2,3 ..., K (1) is P here
iBe i performance number, P
NoiseNoise power-value, T
1It is threshold value 1.If being worth the condition that the detected K of a detector maximum power value satisfies the signal-noise ratio threshold in the above-mentioned formula (1) in the window most just is judged as the effective diameter component and writes down its corresponding position.
Second kind of effective diameter component selector comprises a threshold judgement device two, and its judgement formula is as follows:
| P
Max-P
i|＜T
2I=1,2,3 ..., K (2) is P here
iBe i performance number, P
MaxThe main footpath here is to be worth K of the detector output maximum (just main performance number directly) in the value, T in the window most
2It is threshold value 2.
Described threshold judgement device two is compared with main performance number directly according to being worth most K the maximum power value that go out that detector detects, and judges that its absolute difference just can be judged as the effective diameter component and write down its corresponding position less than formula (2) threshold condition.
The third effective diameter component selector comprises a noise power calculation device, a threshold judgement device one and a threshold judgement device two.Described noise power calculation device is identical with threshold judgement device one with the noise power calculation device that first kind of effective diameter component selector comprised with described threshold judgement device one, and described threshold judgement device two is identical with threshold judgement device two in second kind of effective diameter component selector.When adopting the effective diameter component selector of this kind structure, the condition that must satisfy above-mentioned two kinds of threshold judgement devices simultaneously just can be judged out the effective diameter component and write down out corresponding position.Select for use the performance of this effective diameter component selector to be better than the performance of preceding two kinds effective diameter component selector.
Effective diameter after the effective diameter selector will screen and corresponding position data thereof are input in the decision device of synchronous footpath, described synchronous footpath decision device finds the most forward footpath, position according to the data of input, the position of first effective diameter among the present invention that Here it is, its position are exactly the synchronization position that finds.
The present invention is an example with the TD-SCDMA system only, but the method also can be used for the stationary problem of other field of wireless communications systems.Those of ordinary skills can carry out multiple different modification to the present invention in spirit of the present invention and viewpoint.All equal variation and modifications of being done according to claims scope of the present invention are all the scope that the present invention protects.
Claims (10)
1. determine the device of frame synchronization to it is characterized in that it comprises: a reference signal generator, a correlator by the method for channel profile window for one kind, one power calculator, a channel profile window detector is worth detector most in one window, one effective diameter component selector, a synchronous footpath decision device; Wherein
Described reference signal generator, reference signal are to produce the corresponding synchronous sign indicating number by receiver;
Described correlator (or matched filter), it carries out related operation with the data of reception and the data of signal generator output;
Described power calculator, its result to the correlator input asks mould square (or mould) computing to obtain the related power value;
Described channel profile window detector, its window with a length of default moves in the scope of whole related power value, the step-length that moves is variable, obtain several windows, calculate the related power in fenestrate add up and, and filter out therefrom that power adds up and peaked window is a channel profile window;
Be worth most detector in the described window, it finds several maximum performance numbers successively in the channel profile window that channel profile window detector filters out, and writes down their related power value and corresponding position;
Described effective diameter component selector, it screens several the maximum performance numbers that find in the window according to the result who is worth most the detector input in the result of power calculator input and the window, selects effective footpath component;
Described synchronous footpath decision device, it is according to finding the most forward effective diameter component in position in the effective diameter component that filters out in the effective diameter component selector.
2. as claimed in claim 1ly a kind ofly determine the device of frame synchronization to it is characterized in that it also comprises: a position bigness scale device, a delay controller, a data pick-up device by the method for channel profile window; Wherein
Described position bigness scale device, it can measure the position that data are sent roughly;
The position that described delay controller, its positional information of measuring according to the rough measure data come the control data withdrawal device that data are extracted;
Described data pick-up device, it is according to the output result of delay controller, extract the data of a segment length, the data of this section extraction can be according to the cellular system radius of society, presetting ranges such as antenna configurations extract, in certainly the data segment that contains synchronous code in the data that send being included in the data of this section extraction.
3. as claimed in claim 1ly a kind ofly determine to it is characterized in that the device of frame synchronization by the method for channel profile window: described correlator can substitute with matched filter.
4. as claimed in claim 1ly a kind ofly determine the device of frame synchronization by the method for channel profile window, it is characterized in that: described effective diameter component selector is made up of a noise power calculation device and a threshold judgement device one.
5. as claimed in claim 1ly a kind ofly determine the device of frame synchronization by the method for channel profile window, it is characterized in that: described effective diameter component selector is made up of a threshold judgement device two.
6. as claimed in claim 1ly a kind ofly determine the device of frame synchronization, it is characterized in that described effective diameter component selector is made up of a noise power calculation device and a threshold judgement device one and a threshold judgement device two by the method for channel profile window.
7. determine to it is characterized in that the method for frame synchronization by the method for channel profile window for one kind, comprise the steps:
Step 1, correlator are carried out related operation by the position code sequence information of importing in the signal that receives and the reference signal generator, and to obtain a length be N plural number correlated results, then plural correlated results is input in the power calculator, asks mould square (or mould) computing to obtain the related power value to correlated results by power calculator; The value of resulting related power is input in the channel profile window detector, it is to be that the window of W moves in the scope of whole related power value by the length at default that channel profile window detects, the step-length that moves is variable, obtain several windows, calculate the related power in fenestrate add up and, and therefrom filter out power and add up and peaked window, this window is exactly a channel profile window;
Be worth most in the detector in step 2, the input window as a result with channel profile window detector, being worth most detector in the window travels through related power value in the whole channel profile window and finds several maximum power values and write down its related power and corresponding position, the result is input in the effective diameter selector then, the effective diameter selector screens several maximum power values of input, selects effective footpath component and writes down out its corresponding position;
Step 3, synchronous footpath decision device are searched the effective diameter of effective diameter selector input, find the position (being first effective diameter component) of the most forward effective diameter in position;
Step 4, find the position synchronous of first effective diameter component with synchronous footpath decision device.
8. a kind of method of determining frame synchronization by the method for channel profile window as claimed in claim 7, it is characterized in that: described effective diameter selector is realized selection function by a noise power calculation device and a threshold judgement device one, wherein said noise power calculation device calculates corresponding noise power according to several maximum performance numbers that are worth most the detector input in the value of all related powers of power calculator input and the window, the computational process of concrete noise power is at first to be worth most the related power value that detector is exported in the filter windows in all related power values, then remaining related power is averaged, this value promptly is a noise power-value, described threshold judgement device one is according to the noise power-value of noise power calculation device input, be worth most several detected maximum performance numbers of detector in the window, can rule out the effective diameter component in the channel and write down its position.Wherein concrete judgement formula is as follows:
| P
i-P
Noise|＞T
1I=1,2,3 ..., K (1) is P here
iBe i performance number, P
NoiseNoise power-value, T
1It is threshold value 1; If being worth the condition that several detected maximum power values of detector satisfy the signal-noise ratio threshold in the above-mentioned formula (1) in the window most just is judged as the effective diameter component and writes down its corresponding position.
9. as claimed in claim 7ly a kind ofly determine to it is characterized in that the method for frame synchronization by the method for channel profile window: effective diameter component selector is realized selection functions by a threshold judgement device two, and its judgement formula is as follows:
| P
Max-P
i|＜T
2I=1,2,3 ..., K (2) is P here
iBe i performance number, P
MaxThe main footpath here is the maximum (performance number in main footpath just) during several that be worth detector output in the window most are worth most, T
2It is threshold value 2.Described threshold judgement device two is compared with the performance number in main footpath according to being worth most several maximum power values that go out that detector detects, and judges that its absolute difference just can be judged as the effective diameter component and write down its corresponding position less than formula (2) threshold condition.
10. as claimed in claim 7ly a kind ofly determine to it is characterized in that the method for frame synchronization by the method for channel profile window: effective diameter component selector is by a noise power calculation device, and a threshold judgement device one and a threshold judgement device two are realized selection functions.Described noise power calculation device is identical with threshold judgement device one with the noise power calculation device described in the claim 8 with described threshold judgement device one, its judgment condition is also identical, described threshold judgement device two is identical with the threshold judgement device two described in the claim 9, and its judgment condition is also identical; When satisfying the condition of above-mentioned two kinds of threshold judgement devices simultaneously, just can be judged out the effective diameter component and write down out corresponding position.
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| CN101420405A (en) * | 2008-12-09 | 2009-04-29 | 中国电子科技集团公司第五十四研究所 | Multi-path symbol resistant timing synchronization device |
| CN1863408B (en) * | 2006-06-12 | 2010-05-12 | 北京天碁科技有限公司 | Method and system for implementing common frequency measurement in TD-SCDMA system |
| CN101114842B (en) * | 2007-06-27 | 2010-05-19 | 中科院嘉兴中心微系统所分中心 | Frame signal detection device for building dense city district |
| CN101291310B (en) * | 2007-04-18 | 2011-04-13 | 富士通株式会社 | Frame synchronizing device and method in broadband wireless communication system |
| CN102455423A (en) * | 2011-05-31 | 2012-05-16 | 吉林大学 | Method for eliminating sound reflection interference in ultrasonic location |
| CN101588192B (en) * | 2009-02-26 | 2013-03-13 | 北京天碁科技有限公司 | Method and device for confirming coarse synchronizing of downlink pilot |
-
2003
- 2003-10-09 CN CN2003101003193A patent/CN1216502C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1863408B (en) * | 2006-06-12 | 2010-05-12 | 北京天碁科技有限公司 | Method and system for implementing common frequency measurement in TD-SCDMA system |
| CN101291310B (en) * | 2007-04-18 | 2011-04-13 | 富士通株式会社 | Frame synchronizing device and method in broadband wireless communication system |
| CN101114842B (en) * | 2007-06-27 | 2010-05-19 | 中科院嘉兴中心微系统所分中心 | Frame signal detection device for building dense city district |
| CN101420405A (en) * | 2008-12-09 | 2009-04-29 | 中国电子科技集团公司第五十四研究所 | Multi-path symbol resistant timing synchronization device |
| CN101420405B (en) * | 2008-12-09 | 2013-08-21 | 中国电子科技集团公司第五十四研究所 | Multi-path symbol resistant timing synchronization device |
| CN101588192B (en) * | 2009-02-26 | 2013-03-13 | 北京天碁科技有限公司 | Method and device for confirming coarse synchronizing of downlink pilot |
| CN102455423A (en) * | 2011-05-31 | 2012-05-16 | 吉林大学 | Method for eliminating sound reflection interference in ultrasonic location |
| CN102455423B (en) * | 2011-05-31 | 2013-04-17 | 吉林大学 | Method for eliminating sound reflection interference in ultrasonic location |
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