CN102869027B - Method and device for detecting physical random access channel (PRACH) of multi-antenna base station - Google Patents
Method and device for detecting physical random access channel (PRACH) of multi-antenna base station Download PDFInfo
- Publication number
- CN102869027B CN102869027B CN201210337765.5A CN201210337765A CN102869027B CN 102869027 B CN102869027 B CN 102869027B CN 201210337765 A CN201210337765 A CN 201210337765A CN 102869027 B CN102869027 B CN 102869027B
- Authority
- CN
- China
- Prior art keywords
- prach
- domain data
- frequency domain
- antenna
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a method and a device for detecting a physical random access channel (PRACH) of a multi-antenna base station. The method comprises that the amplitude variance of the corresponding PRACH frequency domain data of each antenna is respectively obtained, and the corresponding antennas of the PRAC frequency domain data which has the amplitude variance being smaller than a variance threshold value are selected; an automatic gain control (AGC) factor of the corresponding PRACH frequency domain data of each selected antenna is determined; and the PRACH detection is carried out on the PRACH frequency domain data with the AGC factor being greater than the set threshold value. The method and a device are used for solving the problem of leak detection which is caused by over large processing quantity, overlong processing time and overtime processing of the PRACH detection of the base station which adopts a plurality of antennas in the prior art.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of PRACH detection method of multi-antenna base station and device.
Background technology
At LTE(Long Term Evolution, Long Term Evolution) in system, random access procedure is a very the key link, and this process is UE(User Equipment, user terminal) with eNB(evolvedNode B, evolved base station) set up the prerequisite of communication link.No matter user terminal UE initially accesses community after powering, or carries out cell merge in communication process, all needs to rely on random access procedure and base station eNB to set up and contacts.Therefore, LTE PRACH(Physical Random Access Channel, Physical Random Access Channel) in the transmission plan of asynchronous UE and LTE up-link wireless access, play crucial role.Generally send accidental access signal by user terminal, and PRACH receiver is for initiating this random access procedure.Because PRACH receiver adopts the mode of blind check to process accidental access signal, when base station is configured with 8 antennas, due to the difference that the PRACH of each root antenna configures, PRACH receiver can become multiple to increase to the treating capacity of accidental access signal, and base station needs at guarantee processing time normal situation decline low complex degree, reduces amount of calculation, avoids undetected and empty inspection, therefore, the processing pressure of base station also increases along with the increase of the antenna amount of configuration.
In current LTE system, the frame structure of PRACH time-domain signal, as shown in Figure 1, comprises CP(Cyclic prefix, Cyclic Prefix), preamble(lead code) sequence and GT(Guard Time, protection time slot).
Table 1 is the parameter value of lead code, and these values are configured by frame structure and Stochastic accessing and determine.
Table 1
| Lead code form | T CP | T SEQ |
| 0 | 3168·T s | 24576·T s |
| 1 | 21024·T s | 24576·T s |
| 2 | 6240·T s | 2·24576·T s |
| 3 | 21024·T s | 2·24576·T s |
| 4 * | 448·T s | 4096·T s |
4
*being only applicable to the UpPTS(Uplink Pilot Time Slot in frame structure type 2, uplink subframe time slot) length is 4384T
sand 5120T
sspecial subframe configuration.Change-over period be the schematic diagram of the Type2 frame structure (i.e. frame structure type 2) of 5ms as shown in Figure 6.
In LTE system, PRACH receiver adopts the method for mixed time domain and frequency domain, calculate the PRACH data being configured with each root antenna in the base station of 8 antennas, the PRACH data of each root antenna are carried out respectively CP process, time domain data frequency spectrum shift, time domain data filtering, down-sampling, FFT conversion and frequency domain AGC module, send into again in PRACH demodulation module and carry out demodulation, be illustrated in fig. 2 shown below, wherein, K is configurating base station reception antenna number.
In the PRACH data of each root antenna through process and entering the sequence correlation module of PRACH receiver, each ZC(Zadoff-Chu in this community, pseudo-ly superposing) root sequence carries out sequence related operation with the data on each root reception antenna respectively.And the number of operations carrying out sequence related operation is N
root* K
ant(N
rootfor the ZC root sequence quantity that each community needs, K
antfor reception antenna number), preamble sequence is generated by the Zadoff-Chu root sequence of one or more zero correlation according to 3GPP TS36.211 agreement, the length of preamble sequence is as shown in table 2, the length adopting the preamble sequence (namely have employed the preamble sequence of lead code form 0 or form 1 or form 2 or form 3) of lead code form 1 ~ 3 is 839, and adopts the length of the preamble sequence of lead code format 4 to be 139.
Table 2
(preamble sequence length)
| Lead code form | N ZC |
| 0~3 | 839 |
| 4 | 139 |
Each community needs configuration 64 preamble sequences.When 64 preamble sequences cannot be generated by a Zadoff-Chu root sequence, corresponding Zadoff-Chu root sequence can be gone out by the logic index search in PRACH receiver and generate remaining preamble sequence, make the sum of the random access lead code of configuration in each community reach 64.When generating preamble sequence, the relevant Zadoff-Chu root sequence number that this locality of use stores is determined according to following table 3, table 4 by 3GPP TS 36.211 agreement.Table 3 have employed the N needed for the preamble sequence of lead code form 0 ~ 3 for generation
cSvalue.
Table 3
Table 4 is for generating the N needed for the preamble sequence that have employed lead code format 4
cSvalue.
Table 4
In current LTE protocol regulation with implementation, be applied in situation in different scene for meeting up PRACH, base station needs the different lead code format configuration of configuration and N
cSconfiguration.Due to N
cSthe N of configuration
cSthe root sequence index that value produces is the ZC root sequence quantity that each community needs, when ZC root sequence quantity is 64 to the maximum, if base station have employed the configuration of 8 antennas, the relevant calculating of sequence can be caused to need to carry out 64*8 (namely 512 times) root sequence associative operation, and IDFT(Inverse Discrete FourierTransform, inverse discrete Fourier transform) operation also need to carry out 64*8 time.Obviously, the treating capacity that the base station that have employed multiple antennas in prior art is detected for PRACH is excessive, the problem that processing time is long, and when upper once PRACH detects beginning, if this PRACH detects the operating procedure do not completed in addition, then there will be detection leakage phenomenon, affect normal random access procedure.
Summary of the invention
The embodiment of the present invention provides a kind of PRACH detection method and device of multi-antenna base station, in order to solve the undetected problem that treating capacity is excessive and the processing time is long and process time-out causes that the base station that have employed many antennas that exists in prior art is detected PRACH.
The concrete technical scheme that the embodiment of the present invention provides is as follows:
A PRACH detection method for multi-antenna base station, comprising:
Obtain the amplitude variance of the frequency domain data of PRACH corresponding to each root antenna respectively, the amplitude variance of choosing is not more than antenna corresponding to the frequency domain data of the PRACH of variance threshold value;
Determine the automatic growth control AGC factor of the frequency domain data of the PRACH that antenna that each root is chosen is corresponding;
The frequency domain data AGC factor being greater than to the PRACH of setting threshold carries out PRACH detection.
A PRACH checkout gear for multi-antenna base station, comprising:
First judge module, obtains the amplitude variance of the frequency domain data of PRACH corresponding to each root antenna respectively, and the amplitude variance of choosing is not more than antenna corresponding to the frequency domain data of the PRACH of variance threshold value;
Determination module, determines the automatic growth control AGC factor of the frequency domain data of the PRACH that antenna that each root is chosen is corresponding;
Detection module, the frequency domain data AGC factor being greater than to the PRACH of setting threshold carries out PRACH detection.
The embodiment of the present invention is judged by PRACH signal and frequency domain AGC judges two operations, optimize the handling process that multiple antennas PRACH is detected, decrease the antenna number of the number of times carrying out sequence coherent detection and IDFT in PRACH testing process and data merging treatment, can while not affecting detection perform, effectively antenna is chosen, be reduced in operand in PRACH detection, reduce the processing time and treating capacity PRACH detected base station, reduce the undetected problem of the PRACH that process time-out causes, the success rate that PRACH detects can be improved.
Accompanying drawing explanation
Fig. 1 is the frame structure schematic diagram of the time-domain signal of PRACH of the prior art;
Fig. 2 is the process of PRACH receiver process accidental access signal in prior art;
Fig. 3 is that in the embodiment of the present invention, variance is the correct PRACH frequency domain data constellation point diagram of 0.1;
Fig. 4 is the PRACH overhaul flow chart of the multi-antenna base station in the embodiment of the present invention;
Fig. 5 is the PRACH testing process schematic diagram of the embodiment of the present invention;
The Type2 frame structure schematic diagram of Fig. 6 to be the change-over period be 5ms;
Fig. 7 is the PRACH checkout gear schematic diagram in the embodiment of the present invention.
Embodiment
According to the regulation of current LTE protocol scheme, base station is more in the number of antennas of configuration, and the ZC root sequence quantity that each community needs is larger, and the treating capacity of base station can be made like this to increase, and is easy to cause PRACH process time-out, affects the Stochastic accessing of user terminal.
Undetected in order to avoid PRACH Stochastic accessing, the embodiment of the present invention is improved the handling process that PRACH detects, choose PRACH signal quality preferably antenna time, PRACH frequency domain data after can converting according to having carried out in PRACH receiver FFT carries out signal and chooses, because the good PRACH signal of signal to noise ratio is made up of Zadoff-Chu sequence, it has good perseverance zero autocorrelation performance, also a lot of feature is had, be exactly the most significantly wherein carried out FFT conversion after the permanent width characteristic of PRACH data on frequency domain be that signal amplitude and variance are all very little, planisphere is circular.The constellation point diagram of the PRACH frequency domain data of the second best in quality PRACH signal after having carried out FFT conversion as shown in Figure 3.
The embodiment of the present invention, by calculating the amplitude variance of the PRACH frequency domain data after FFT conversion, compares with given threshold value, judges whether the PRACH signal that this PRACH frequency domain data is corresponding is the good signal of quality with this.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
The embodiment of the present invention design multi-antenna base station PRACH detection method flow chart as shown in Figure 4:
Step 401:PRACH receiver receives corresponding time-domain signal respectively by many antennas.
In the embodiment of the present invention, the frame structure of the time-domain signal of PRACH comprises CP, preamble sequence and protection time slot GT
Suppose that there is M root antenna base station, PRACH receiver then receives corresponding time-domain signal by this M root antenna and respectively stored in PRACH receiver.
Step 402:PRACH receiver goes cyclic prefix CP process to the time-domain signal that each root antenna receives respectively, obtains the time domain data gone after CP that each root antenna is corresponding.
Particularly, by PRACH receiver, CP process is gone to the time-domain signal that each root antenna receives, retain preamble sequence and GT part.
The time domain data after CP that goes that step 403:PRACH receiver is corresponding to each root antenna respectively carries out time domain data frequency spectrum shift, then carries out time domain data filtering and down-sampling, and then carries out FFT conversion, obtains the frequency domain data of corresponding PRACH.
Step 404:PRACH receiver obtains the amplitude variance of the frequency domain data of PRACH corresponding to each root antenna respectively, the amplitude variance of choosing is not more than antenna corresponding to the frequency domain data of the PRACH of variance threshold value, determine the automatic growth control AGC factor of the frequency domain data of the PRACH that antenna that each root is chosen is corresponding, the frequency domain data AGC factor being greater than to the PRACH of setting threshold carries out PRACH detection.
In actual applications, step 404 can also be realized by following three steps:
Step one: PRACH receiver is analyzed the frequency domain data of PRACH corresponding to each root antenna respectively, calculate the amplitude variance of PRACH frequency domain data corresponding to each root antenna, compare with variance threshold value P: if be greater than variance threshold value P, then judge that current frequency domain data is incorrect, by sky wire size corresponding for current frequency domain data stored in antenna sets K
badin; If be not more than variance threshold value P, then judge that the PRACH frequency domain data that current frequency domain data is corresponding is correct and good, by current sky wire size stored in antenna sets K
goodin, judge whether that the PRACH frequency domain data that whole antennas is corresponding is all greater than threshold value, if so, then carry out step 2, otherwise carry out step 3.
Step 2: carry out alarm, exits multiple antennas PRACH testing process.
Step 3: PRACH frequency domain data corresponding to each root antenna respectively, carry out frequency domain AGC(Automatic Gain Control, automatic growth control) process, draw the AGC factor of the PRACH frequency domain data that each root antenna is corresponding, the antenna sets K in obtaining step one
goodin the frequency domain AGC factor corresponding to antenna, and compare with the threshold value of setting, obtain the AGC frequency domain factor being greater than the threshold value of setting, the antenna that these AGC frequency domain factor pairs are answered is carried out the subsequent operation in PRACH detection, and other antenna does not do subsequent treatment, to reduce amount of calculation.
Step 405: obtain the number N that the AGC factor is greater than the frequency domain data respective antenna of the PRACH of setting threshold:
If N=0, then carry out alarm, exit multiple antennas PRACH testing process;
If N=1, then corresponding to the antenna found out frequency domain data carries out sequence coherent detection and inverse discrete Fourier transform IDFT, then carries out follow-up PRACH testing process, namely carry out step 408;
If 1>N>M, after then corresponding to the antenna found out frequency domain data carries out sequence coherent detection and IDFT, carry out data merging, then carry out follow-up PRACH testing process (namely carry out step 408), wherein, M is the antenna sum of base station.
Particularly, PRACH receiver can obtain from K
goodthe AGC factor of the frequency domain data of the PRACH of the correspondence found out in antenna sets is greater than the number N of the antenna number of setting threshold, and (N is not more than K
goodantenna number in group).
In practical application, be configured with 8 antennas in base station, when needing that the number of antennas N that selects is 4, system bandwidth is configured to 20M, preamble sequence have employed lead code form 0, the detailed process of above-mentioned steps 401 to step 405, Ke Yiwei:
The total quantity of the time domain data that PRACH receiver is received by 8 antennas is 8*30720,8*24576 is become after past CP process, after time domain data filtering and down-sampling, become 8*2048, carry out FFT conversion, the PRACH frequency domain data quantity extracted is 8*839, and 839 frequency domain datas that these 8 antennas are corresponding respectively carry out frequency domain data judgement, selects antenna corresponding to the frequency domain data that is greater than variance threshold value P stored in antenna sets K
goodin (now, K
goodin antenna number normally should between 4 to 8), the PRACH frequency domain data corresponding to each root antenna carries out frequency domain AGC process, obtains the AGC factor that every root antenna data is corresponding respectively, by antenna sets K
goodin antenna respectively the corresponding A GC factor compare and arrange by order from big to small, the antenna that front 4 AGC factor pairs are answered is selected, the subsequent operation during the PRACH carrying out comprising that sequence is correlated with etc. detects.
Step 406: signal power calculating and noise power calculation are carried out to data, and judge whether to access with the signal of preamble sequence according to the signal power calculated and noise power, if there is the signal with preamble sequence to access, then confirm PRACH signal to be detected; Otherwise, judge PRACH signal not detected.Step 408 is follow-up PRACH input flow process.
So far, the PRACH of multi-antenna base station has detected.
The embodiment of the present invention have also been devised a kind of Physical Random Access Channel PRACH checkout gear of multi-antenna base station as shown in Figure 7, specifically comprises following module.
Receiver module 701, for receiving corresponding time-domain signal respectively by many antennas.
Going CP module 702, for going cyclic prefix CP process to the time-domain signal that each root antenna receives respectively, obtaining the time domain data gone after CP that each root antenna is corresponding.
Conversion module 703, for respectively to each root antenna corresponding go the time domain data after CP to carry out time domain data frequency spectrum shift, time domain data filtering, down-sampling and fast Fourier transform FFT to convert, obtain the frequency domain data of corresponding PRACH.
First judge module 704, for obtaining the amplitude variance of the frequency domain data of PRACH corresponding to each root antenna respectively, the amplitude variance of choosing is not more than antenna corresponding to the frequency domain data of the PRACH of variance threshold value, if and be all greater than variance threshold value for the amplitude variance of the frequency domain data obtaining PRACH corresponding to each root antenna, then carry out alarm, exit multiple antennas PRACH testing process.
Determination module 705, the automatic growth control AGC factor of the frequency domain data of the PRACH that the antenna chosen for each root is corresponding, can also be used for determining the automatic growth control AGC factor of the frequency domain data of the PRACH that antenna that each root is not selected is corresponding.
Detection module 706, the frequency domain data AGC factor being greater than to the PRACH of setting threshold carries out PRACH detection, and is greater than the number N of the frequency domain data respective antenna of the PRACH of setting threshold for obtaining the AGC factor:
If N=0, then carry out alarm, exit multiple antennas PRACH testing process;
If N=1, then sequence coherent detection and inverse discrete Fourier transform IDFT are carried out to the frequency domain data that each AGC factor is greater than the PRACH of setting threshold, then carry out PRACH input;
If N is greater than 1 and be less than the antenna sum of base station, then, after the frequency domain data being greater than the PRACH of setting threshold to each AGC factor carries out sequence coherent detection and inverse discrete Fourier transform IDFT, carries out data merging, then carry out PRACH input.
Signal detection module 707, for carrying out PRACH input, specifically comprise: signal power calculating and noise power calculation are carried out to the data obtained, and judge whether to access with the signal of preamble sequence according to the signal power calculated and noise power, if have, then judge to detect in PRACH have PRACH signal, otherwise, judge to detect in PRACH there is no PRACH signal.
In LTE system, the frame structure of the time-domain signal of above-mentioned PRACH comprises CP, preamble sequence and protection time slot GT.
The embodiment of the present invention is not limited only to the base station being configured with 8 antennas, also can be applied in the base station adopting spaced antenna configuration or other different antenna configurations, complete PRACH to detect, and the embodiment of the present invention is only chosen the good antenna of PRACH signal quality and is carried out follow-up sequence coherent detection, IDFT and data merging treatment, the treating capacity of the reduction PRACH of multiple can be become like this, and complete PRACH process normally, on time.
The method of a kind of PRACH detection of embodiment of the present invention design and device, PRACH frequency domain data characteristic and the frequency domain AGC factor is utilized to judge that whether PRACH signal is good, decrease the antenna amount needing to carry out sequence coherent detection, IDFT and data merging treatment, can while not affecting detection perform, effectively antenna is chosen, be reduced in operand in PRACH detection, reduce the processing time and treating capacity PRACH detected base station, reduce the undetected problem of the PRACH that process time-out causes, the success rate that PRACH detects can be improved.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the embodiment of the present invention and not depart from the spirit and scope of the embodiment of the present invention.Like this, if these amendments of the embodiment of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. a Physical Random Access Channel PRACH detection method for Long Term Evolution LTE multi-antenna base station, is characterized in that, comprising:
Obtain the amplitude variance of the frequency domain data of PRACH corresponding to each root antenna respectively, the amplitude variance of choosing is not more than antenna corresponding to the frequency domain data of the PRACH of variance threshold value;
Determine the automatic growth control AGC factor of the frequency domain data of the PRACH that antenna that each root is chosen is corresponding;
The frequency domain data AGC factor being greater than to the PRACH of setting threshold carries out PRACH detection, and wherein, the described frequency domain data AGC factor being greater than to the PRACH of setting threshold carries out PRACH detection, comprising:
Obtain the number N that the AGC factor is greater than the frequency domain data respective antenna of the PRACH of setting threshold:
If N=0, then carry out alarm, exit multiple antennas PRACH testing process;
If N=1, then sequence coherent detection and inverse discrete Fourier transform IDFT are carried out to the frequency domain data that each AGC factor is greater than the PRACH of setting threshold, then carry out PRACH input;
If N is greater than 1 and be less than the antenna sum of base station, then, after the frequency domain data being greater than the PRACH of setting threshold to each AGC factor carries out sequence coherent detection and inverse discrete Fourier transform IDFT, carries out data merging, then carry out PRACH input.
2. the method for claim 1, is characterized in that, before the amplitude variance of frequency domain data obtaining PRACH corresponding to each root antenna respectively, comprising:
Corresponding time-domain signal is received respectively by many antennas;
Respectively cyclic prefix CP process is gone to the time-domain signal that each root antenna receives, obtain the time domain data gone after CP that each root antenna is corresponding;
Respectively to each root antenna corresponding go the time domain data after CP to carry out time domain data frequency spectrum shift, time domain data filtering, down-sampling and fast Fourier transform FFT to convert, obtain the frequency domain data of corresponding PRACH.
3. the method for claim 1, is characterized in that, described PRACH input, comprising:
Signal power calculating and noise power calculation are carried out to the data obtained, and judge whether to access with the signal of preamble sequence according to the signal power calculated and noise power, if have, then judge to detect in PRACH have PRACH signal, otherwise, judge to detect in PRACH there is no PRACH signal.
4. the method for claim 1, is characterized in that, also comprises:
If the amplitude variance obtaining the frequency domain data of PRACH corresponding to each root antenna described is all greater than variance threshold value, then carries out alarm, exit multiple antennas PRACH testing process.
5. the method for claim 1, is characterized in that, after the amplitude variance of choosing is not more than antenna corresponding to the frequency domain data of the PRACH of variance threshold value, also comprises:
Determine the automatic growth control AGC factor of the frequency domain data of the PRACH that each root antenna is corresponding.
6. the method according to any one of claim 1-5, is characterized in that,
In LTE system, described PRACH is made up of CP, preamble sequence and protection time slot GT.
7. a Physical Random Access Channel PRACH checkout gear for Long Term Evolution LTE multi-antenna base station, is characterized in that, comprising:
First judge module, obtains the amplitude variance of the frequency domain data of PRACH corresponding to each root antenna respectively, and the amplitude variance of choosing is not more than antenna corresponding to the frequency domain data of the PRACH of variance threshold value;
Determination module, determines the automatic growth control AGC factor of the frequency domain data of the PRACH that antenna that each root is chosen is corresponding;
Detection module, the frequency domain data AGC factor being greater than to the PRACH of setting threshold carries out PRACH detection, and wherein, the described frequency domain data AGC factor being greater than to the PRACH of setting threshold carries out PRACH detection, comprising:
Obtain the number N that the AGC factor is greater than the frequency domain data respective antenna of the PRACH of setting threshold:
If N=0, then carry out alarm, exit multiple antennas PRACH testing process;
If N=1, then sequence coherent detection and inverse discrete Fourier transform IDFT are carried out to the frequency domain data that each AGC factor is greater than the PRACH of setting threshold, then carry out PRACH input;
If N is greater than 1 and be less than the antenna sum of base station, then, after the frequency domain data being greater than the PRACH of setting threshold to each AGC factor carries out sequence coherent detection and inverse discrete Fourier transform IDFT, carries out data merging, then carry out PRACH input.
8. device as claimed in claim 7, is characterized in that, also comprise:
Receiver module, for receiving corresponding time-domain signal respectively by many antennas;
Going CP module, for going cyclic prefix CP process to the time-domain signal that each root antenna receives respectively, obtaining the time domain data gone after CP that each root antenna is corresponding;
Conversion module, for respectively to each root antenna corresponding go the time domain data after CP to carry out time domain data frequency spectrum shift, time domain data filtering, down-sampling and fast Fourier transform FFT to convert, obtain the frequency domain data of corresponding PRACH.
9. device as claimed in claim 7, is characterized in that, also comprises signal detection module, for carrying out described PRACH input, specifically comprising:
Signal power calculating and noise power calculation are carried out to the data obtained, and judge whether to access with the signal of preamble sequence according to the signal power calculated and noise power, if have, then judge to detect in PRACH have PRACH signal, otherwise, judge to detect in PRACH there is no PRACH signal.
10. device as claimed in claim 7, is characterized in that, described first judge module, also for,
If the amplitude variance obtaining the frequency domain data of PRACH corresponding to each root antenna described is all greater than variance threshold value, then carries out alarm, exit multiple antennas PRACH testing process.
11. devices as claimed in claim 7, is characterized in that, described determination module also for,
After the amplitude variance of choosing is not more than antenna corresponding to the frequency domain data of the PRACH of variance threshold value, determine the automatic growth control AGC factor of the frequency domain data of the PRACH that each root antenna is corresponding.
12. devices according to any one of claim 7-11, is characterized in that,
In LTE system, described PRACH is made up of CP, preamble sequence and protection time slot GT.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210337765.5A CN102869027B (en) | 2012-09-12 | 2012-09-12 | Method and device for detecting physical random access channel (PRACH) of multi-antenna base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210337765.5A CN102869027B (en) | 2012-09-12 | 2012-09-12 | Method and device for detecting physical random access channel (PRACH) of multi-antenna base station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102869027A CN102869027A (en) | 2013-01-09 |
| CN102869027B true CN102869027B (en) | 2015-04-15 |
Family
ID=47447559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210337765.5A Active CN102869027B (en) | 2012-09-12 | 2012-09-12 | Method and device for detecting physical random access channel (PRACH) of multi-antenna base station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102869027B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104507110A (en) * | 2014-12-25 | 2015-04-08 | 中国电子科技集团公司第四十一研究所 | Precise detection method of PRACHs (physical random access channels) for LTE-FDD (long-term evolution-frequency division duplex) |
| CN110198567B (en) * | 2018-02-26 | 2021-11-26 | 深圳市中兴微电子技术有限公司 | Random access detection method and device |
| US10448432B1 (en) | 2018-06-11 | 2019-10-15 | Hong Kong Applied Science And Technology Research Institute Co., Ltd. | Frequency domain PRACH filter for PRACH signal recovery |
| CN109792622B (en) * | 2018-06-11 | 2021-11-09 | 香港应用科技研究院有限公司 | Method for physical random access channel PRACH signal recovery and frequency domain PRACH filter |
| CN111328088B (en) * | 2018-12-17 | 2021-12-03 | 华为技术有限公司 | PRACH detection method and device |
| CN112689335A (en) * | 2019-10-18 | 2021-04-20 | 深圳市中兴微电子技术有限公司 | Data merging method and device for random access channel |
| CN114745729A (en) * | 2022-04-26 | 2022-07-12 | 上海中兴易联通讯股份有限公司 | Method and device for combining PRACH (physical random Access channel) baseband of NR (non-reciprocal) small base station |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1453224A2 (en) * | 2003-02-27 | 2004-09-01 | Kabushiki Kaisha Toshiba | Signal processing apparatus and method for diversity reception communication systems |
| CN101499845A (en) * | 2008-01-29 | 2009-08-05 | 大唐移动通信设备有限公司 | Uplink synchronous detection method and apparatus for TD-SCDMA system |
| CN101895308A (en) * | 2009-05-22 | 2010-11-24 | 鼎桥通信技术有限公司 | Uplink signal detecting method and downlink signal transmitting method for subdistrict with multiple coverage areas |
| CN101908917A (en) * | 2009-06-05 | 2010-12-08 | 瑞昱半导体股份有限公司 | Receiving device of multi-antenna receiving device and method thereof |
-
2012
- 2012-09-12 CN CN201210337765.5A patent/CN102869027B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1453224A2 (en) * | 2003-02-27 | 2004-09-01 | Kabushiki Kaisha Toshiba | Signal processing apparatus and method for diversity reception communication systems |
| CN101499845A (en) * | 2008-01-29 | 2009-08-05 | 大唐移动通信设备有限公司 | Uplink synchronous detection method and apparatus for TD-SCDMA system |
| CN101895308A (en) * | 2009-05-22 | 2010-11-24 | 鼎桥通信技术有限公司 | Uplink signal detecting method and downlink signal transmitting method for subdistrict with multiple coverage areas |
| CN101908917A (en) * | 2009-06-05 | 2010-12-08 | 瑞昱半导体股份有限公司 | Receiving device of multi-antenna receiving device and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102869027A (en) | 2013-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102869027B (en) | Method and device for detecting physical random access channel (PRACH) of multi-antenna base station | |
| US10292185B2 (en) | Methods and devices for generating and detecting random access preambles | |
| EP3393167B1 (en) | Resource allocation method and device, and base station | |
| CN103716081A (en) | Downlink beam determination method, apparatus and system | |
| EP3621241A1 (en) | Uplink synchronization timing deviation determination method and device | |
| EP3249968A1 (en) | Base station, mobile station, wireless communications system, and wireless communications method | |
| CN109803302B (en) | Method, apparatus and computer readable storage medium for determining coverage enhancement level | |
| EP3099086A1 (en) | Method and device for sending device-to-device synchronization signal, and user equipment | |
| CN105432049A (en) | Method and apparatus for estimating signal to interference plus noise ratio for a random access channel of a wireless network | |
| EP3570583A1 (en) | Detection method and apparatus for identifying false detection caused by interference, and base station | |
| CN106060864A (en) | Threshold adaptive physical random access channel detection method | |
| CN104467992A (en) | DTX detection method and device for LTE system PUCCH | |
| CN103916229A (en) | Interference suppression method and device | |
| CN109041255B (en) | Access method and UE | |
| CN105072060A (en) | DTX determination method and apparatus of physical uplink control channel, and base station | |
| CN102421115A (en) | Method and device for detecting uplink synchronous code | |
| CN103037429B (en) | A kind of interference detection method of TD-LTE system | |
| US9510304B2 (en) | Method and apparatus for implementing primary synchronization signal in time domain and computer storage medium | |
| CN110312321B (en) | Method, device and terminal for determining random access resident frequency point | |
| CN111107562B (en) | Detection method and detection device | |
| US10797924B2 (en) | Method and apparatus for sending information | |
| EP3697049A1 (en) | Signal sending method and apparatus | |
| CN103229422B (en) | Method and device for demodulating signals of physical random access channel | |
| CN111935051B (en) | Method, device, terminal and storage medium for detecting sequence number of synchronous signal block | |
| CN102695183B (en) | Signature detection and time bias estimation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |