CN107148047A - A kind of method for detecting false-alarm signal and base station - Google Patents
A kind of method for detecting false-alarm signal and base station Download PDFInfo
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Abstract
The present invention proposes a kind of method for detecting false-alarm signal, after the signal in receiving narrowband random access channel, the subcarrier initial value that narrowband random accesses channel is traveled through, when often traversing a subcarrier initial value, the base time domain array corresponding with subcarrier initial value is obtained；Point multiplication operation processing is carried out to the signal and the base time domain array, modulus value result is obtained；By the modulus value result, contrasted with modulus value threshold value, if the modulus value result is more than the modulus value threshold value, it is not false-alarm signal then to confirm the signal, if travel through each subcarrier initial value of the narrowband random access channel, judge that calculating obtained modulus value result is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.The above method is handled by simple point multiplication operation and contrast, you can judge whether the signal received is false-alarm signal, it is to avoid using the calculation process of the high complexities such as Fourier transformation, its amount of calculation is small, and implementation complexity is low.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of method for detecting false-alarm signal and base station.
Background technology
Narrowband random access channel is the uplink random access channel of arrowband Internet of Things, is responsible for the access and timing of user.
In practical work process, when base station receives narrowband random access channel signal, false alarm condition, i.e. user can be run into and do not sent
Narrowband random accesses signal, and base station end detects the narrowband random access signal of user transmission, then it is assumed that be false-alarm letter
Number.False-alarm signal, which is properly received narrowband random access channel signal to base station, can produce very big negative effect, and therefore, detection connects
Whether the narrowband random access signal of receipts is false-alarm signal, is had for the signal that base station is properly received narrowband random access channel
Important meaning.
Conventional false-alarm detection method, which is that base station is calculated by discrete Fourier transform first, obtains narrowband random access letter
Number power spectrum, then according to narrowband random access signal spectra calculation obtain narrowband random access signal signal to noise ratio,
Compared by the signal to noise ratio that narrowband random is accessed to signal with decision threshold, the narrowband random signal that receives of judgement whether be
False-alarm signal., it is necessary to carry out substantial amounts of discrete Fourier transform calculating, its is computationally intensive in above-mentioned calculating process, realize multiple
Miscellaneous degree is high.
The content of the invention
Defect and deficiency based on above-mentioned prior art, the present invention propose a kind of method for detecting false-alarm signal and base station,
The detection to false-alarm signal can be realized on the basis of avoiding compared with intensive.
A kind of method for detecting false-alarm signal, applied to base station, this method includes：
Receive the signal in narrowband random access channel；
The subcarrier initial value that the narrowband random accesses channel is traveled through, when often traversing a subcarrier initial value, is obtained
Obtain the base time domain array corresponding with the subcarrier initial value；
Point multiplication operation processing is carried out to the signal and the base time domain array, modulus value result is obtained；
By the modulus value result, the modulus value threshold value for obtaining and storing with precalculating is contrasted, and judges that the signal is
No is false-alarm signal；
If the modulus value result is more than the modulus value threshold value, it is not false-alarm signal to confirm the signal, stops traversal
The narrowband random accesses the subcarrier initial value of channel；
If travel through each subcarrier initial value of the narrowband random access channel, judge to calculate obtained mould
Value result is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.
Preferably, the subcarrier initial value of the narrowband random access channel is being traveled through, at the beginning of often traversing a subcarrier
During initial value, acquire after the base time domain array corresponding with the subcarrier initial value, this method also includes：
Processing is sampled to the signal, sampled signal is obtained；And processing is sampled to the base time domain array,
Obtain array of sampling；
Point multiplication operation processing is carried out with the sampling array to the sampled signal, modulus value result is obtained.
Preferably, it is described to acquire the base time domain array corresponding with the subcarrier initial value, including：
According to the subcarrier initial value, calculating obtains the base time domain array corresponding with the subcarrier initial value.
Preferably, described according to the subcarrier initial value, calculating obtains the base corresponding with the subcarrier initial value
Time domain array, including：
According to the subcarrier initial value, calculating obtains the frequency values corresponding with the subcarrier initial value；
According to the frequency values, calculating obtains the base time domain array corresponding with the frequency values.
Preferably, it is described to acquire the base time domain array corresponding with the subcarrier initial value, including：
Called from the storage device of the base station and obtain the base time domain array corresponding with the subcarrier initial value；Its
In, preserve what is calculated in advance in the storage device of the base station, each of channel is accessed with the narrowband random
The corresponding base time domain array of individual subcarrier initial value.
A kind of base station, including：
Signal receiving unit, for receiving the signal in narrowband random access channel；
Processing unit, the subcarrier initial value of channel is accessed for traveling through the narrowband random, often traverses a son load
During ripple initial value, the base time domain array corresponding with the subcarrier initial value is acquired；
Computing unit, for carrying out point multiplication operation processing to the signal and the base time domain array, obtains modulus value result；
Processing unit is contrasted, the modulus value threshold value for by the modulus value result, obtaining and storing with precalculating is carried out pair
Than whether judge the signal is false-alarm signal；
If the modulus value result is more than the modulus value threshold value, it is not false-alarm signal to confirm the signal, stops traversal
The narrowband random accesses the subcarrier initial value of channel；
If travel through each subcarrier initial value of the narrowband random access channel, judge to calculate obtained mould
Value result is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.
Preferably, when the processing unit acquires the base time domain array corresponding with the subcarrier initial value, tool
Body is used for：
According to the subcarrier initial value, calculating obtains the base time domain array corresponding with the subcarrier initial value.
Preferably, the processing unit is according to the subcarrier initial value, and calculating is obtained and the subcarrier initial value phase
During corresponding base time domain array, specifically for：
According to the subcarrier initial value, calculating obtains the frequency values corresponding with the subcarrier initial value；
According to the frequency values, calculating obtains the base time domain array corresponding with the frequency values.
A kind of base station, including：
Memory and processor；
Wherein, the memory is connected with the processor, for the number produced in storage program and program operation process
According to；
The processor, for by running the program in the memory, realizing following functions：
Receive the signal in narrowband random access channel；The subcarrier initial value that the narrowband random accesses channel is traveled through,
When often traversing a subcarrier initial value, the base time domain array corresponding with the subcarrier initial value is acquired；To institute
State signal and carry out point multiplication operation processing with the base time domain array, obtain modulus value result；By the modulus value result, with precalculating
The modulus value threshold value for obtaining and storing is contrasted, and whether judge the signal is false-alarm signal；If the modulus value result is more than
The modulus value threshold value, then it is not false-alarm signal to confirm the signal, stops the subcarrier that the traversal narrowband random accesses channel
Initial value；If travel through each subcarrier initial value of the narrowband random access channel, judge to calculate obtained mould
Value result is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.
Preferably, the processor is additionally operable to：
Processing is sampled to the signal, sampled signal is obtained；And processing is sampled to the base time domain array,
Obtain array of sampling；Point multiplication operation processing is carried out with the sampling array to the sampled signal, modulus value result is obtained.
When detecting false-alarm signal using method proposed by the present invention, the signal in narrowband random access channel is received
Afterwards, the subcarrier initial value that the narrowband random accesses channel is traveled through, when often traversing a subcarrier initial value, acquired
The base time domain array corresponding with the subcarrier initial value；The signal and the base time domain array are carried out at point multiplication operation
Reason, obtains modulus value result；By the modulus value result, the modulus value threshold value for obtaining and storing with precalculating is contrasted, and judges institute
Whether state signal is false-alarm signal；If the modulus value result is more than the modulus value threshold value, it is not false-alarm to confirm the signal
Signal, stops the subcarrier initial value that the traversal narrowband random accesses channel；If traveling through the narrowband random access channel
Each subcarrier initial value when, judge that calculating obtained modulus value result is not more than the modulus value threshold value, then confirms described
Signal is false-alarm signal.The above method passes through simple point multiplication operation and contrast and handled, you can judge reception signal whether be
False-alarm signal, it is to avoid using the calculation process of the high complexities such as Fourier transformation, its amount of calculation is small, and implementation complexity is low.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of schematic flow sheet of method for detecting false-alarm signal provided in an embodiment of the present invention；
Fig. 2 is the schematic flow sheet of the method for another detection false-alarm signal provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of base station provided in an embodiment of the present invention；
Fig. 4 is the structural representation of another base station provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The embodiment of the invention discloses a kind of method for detecting false-alarm signal, shown in Figure 1 applied to base station, the party
Method includes：
S101, the signal received in narrowband random access channel；
Specifically, narrowband random access channel is the uplink random access channel of arrowband Internet of Things, it is responsible for connecing for user terminal
Enter and timing.User terminal accesses channel by narrowband random, sets up and contacts with base station, is linked among network.In practical communication
During, due to the presence of interchannel noise, base station may be before user terminal access channel transmission signal by narrowband random
Put, receive due to noise signal caused by interchannel noise, i.e. false-alarm signal.For the signal receiving device of base station,
When accessing channel by narrowband random and receiving signal, in this case it is not apparent that reception is signal that user terminal is sent, or false-alarm
Signal.In order to reduce the workload of signal receiving device, it is ensured that signal receiving efficiency, the signal of signal receiving device not to reception
Whether it is that useful signal is judged, the signal for accessing channel uplink from narrowband random, the signal receiving device system of base station
One receives, then judges whether the signal received is useful signal by subsequent processes.
S102, the traversal narrowband random access the subcarrier initial value of channel, often traverse a subcarrier initial value
When, acquire the base time domain array corresponding with the subcarrier initial value；
Specifically, accessing channel for a narrowband random, its subcarrier initial value has specific subcarrier initial value to take
It is worth scope.The user terminal that channel sends upward signal is accessed by the narrowband random, channel can be accessed in the narrowband random
In subcarrier initial value span, a subcarrier initial value is arbitrarily chosen, signal is generated.
For a narrowband random access channel, the corresponding base time domain array of its subcarrier initial value is to determine, and
Base time domain array corresponding with a certain subcarrier initial value, can for identify by the subcarrier initial value generate signal.
The thought of technical scheme of the embodiment of the present invention is, by the way that the user terminal received is initial according to a certain subcarrier
It is worth the signal of generation, base time domain array corresponding with the identical subcarrier initial value that narrowband random accesses channel carries out dot product fortune
Calculation obtains modulus value result, if the signal that user terminal is generated according to the subcarrier initial value, with to should subcarrier base time domain
The dot product modulus value result of array illustrates that the signal is the signal that user terminal is sent in the threshold range of setting, then, otherwise illustrates
The signal is false-alarm signal.After the signal that user terminal transmission is received due to base station, in this case it is not apparent that the signal received is user
Hold what is generated according to which subcarrier initial value, therefore, base station uses the signal and all subcarrier initial values pair that will be received
The base time domain array answered carries out point multiplication operation, and the method contrasted, and whether verify the signal received is that user terminal is sent
Useful signal.As long as any one base time domain number in the signal base time domain array corresponding with all subcarrier initial values received
The modulus value of the point multiplication operation of group illustrates that the signal is not false-alarm signal in the threshold range of setting, then.
Based on above-mentioned principle, in step s 102, base station accesses the subcarrier initial value value model of channel in narrowband random
In enclosing, all subcarrier initial values are traveled through, when often traversing a subcarrier initial value, are obtained and the subcarrier initial value
Corresponding base time domain array, so that subsequent step verifies whether the signal received is false-alarm signal according to base time domain array.
S103, point multiplication operation processing is carried out to the signal and the base time domain array, obtain modulus value result；
Specifically, the element of the signal of reception and base time domain array is carried out into point multiplication operation processing respectively, one can be obtained
New array, carries out modulus computing by each element in array, obtains modulus group, then, to the element in modulus group just
Average value, you can the signal received carries out the modulus value result of point multiplication operation with base time domain array.
S104, by the modulus value result, the modulus value threshold value for obtaining and storing with precalculating is contrasted, and judges the letter
Number whether it is false-alarm signal；
Precalculate and store specifically, modulus value threshold value is base station, specifically calculating the method for modulus value threshold value is, terminal
All-zero signal is sent to base station, after wireless channel, base station obtains s_test (n, s) signal, and wherein n is n-th test, 1
=<n<=N.Signal s_test (n, s) base time domain arrays corresponding with each subcarrier initial value are carried out point multiplication operation by base station
Processing, obtains modulus value result；Whole n is traveled through, modulus value array I (n) can be obtained, the maximum in modulus value array I (n) is found,
It is set as modulus value threshold value.
The characteristic of channel is accessed according to narrowband random, if real narrowband random access signal is sent, its value must
More than all-zero signal.That is real narrowband random accesses signal and the dot product modulus value result of base time domain array, must be big
In above-mentioned modulus value threshold value.Therefore, obtained maximum modulus value result will be calculated by the use of all-zero signal as modulus value threshold value, is to have
Theoretical foundation.
If the modulus value result is more than the modulus value threshold value, it is not false-alarm signal to confirm the signal, stops traversal
The narrowband random accesses the subcarrier initial value of channel；
If travel through each subcarrier initial value of the narrowband random access channel, judge to calculate obtained mould
Value result is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.
If specifically, traversal narrowband random access channel subcarrier initial value during, it is a certain when traversing
During individual subcarrier initial value, calculate obtained modulus value result and be more than modulus value threshold value, then it is not empty that can determine received signal
Alert signal, but real signal.If travel through each subcarrier of the subcarrier of narrowband random access channel, calculate
The modulus value result arrived is all not more than modulus value threshold value, then it is false-alarm signal that can determine received signal.
When the method proposed using the embodiment of the present invention detects false-alarm signal, in narrowband random access channel is received
After signal, the subcarrier initial value that the narrowband random accesses channel is traveled through, when often traversing a subcarrier initial value, is obtained
Obtain the base time domain array corresponding with the subcarrier initial value；Dot product fortune is carried out to the signal and the base time domain array
Calculation is handled, and obtains modulus value result；By the modulus value result, the modulus value threshold value for obtaining and storing with precalculating is contrasted, sentenced
Whether the signal that breaks is false-alarm signal；If the modulus value result is more than the modulus value threshold value, confirm that the signal is not
False-alarm signal, stops the subcarrier initial value that the traversal narrowband random accesses channel；If traveling through the narrowband random access
During each subcarrier initial value of channel, judge that calculating obtained modulus value result is not more than the modulus value threshold value, then confirms
The signal is false-alarm signal.The above method is handled by simple point multiplication operation and contrast, you can judge that the signal received is
No is false-alarm signal, it is to avoid using the calculation process of the high complexities such as Fourier transformation, its amount of calculation is small, and implementation complexity is low.
Optionally, in another embodiment of the present invention, it is shown in Figure 2, traveling through the narrowband random access letter
The subcarrier initial value in road, when often traversing a subcarrier initial value, is acquired corresponding with the subcarrier initial value
Base time domain array after, this method also includes：
S203, processing is sampled to the signal, obtains sampled signal；And the base time domain array is sampled
Processing, obtains array of sampling；
S204, to the sampled signal with it is described sampling array carry out point multiplication operation processing, obtain modulus value result.
Specifically, in order to simplify amount of calculation, the embodiment of the present invention is sampled place to the signal and base time domain array of reception
Reason, the signal and array then obtained using sampling calculates modulus value result.
For example, for base time domain array A (i, t) array, being sampled from array, sampling array B is extracted.Extraction side
Method is：Judge ninitWithSize.IfThen B (t)=A (ninit+ 1, t).
IfThen
For the signal of reception, such as r (s) arrays, r (s) arrays are sequentially divided into new array r (i, t), then by r (i,
T) array sampling obtains array r (t).The step of two steps, is as follows：
A) method that r (s) is divided into r (i, t) is：R (s) is the signal of time domain discrete, and s isTimes
Number, takes a variable i, allows variable i to meet spanI value is traveled through, by impartial strokes of r (s)
It is divided intoGroup number, so as to obtain r (i, t).
B) it is by r (i, the t) methods for being changed into r (t)：Judge ninitWithSize.IfThen r (t)=r (ninit+ 1, t).IfThen
, can be with the range of conditions permit it should be noted that the specific methods of sampling is not limited to above-mentioned drainage method
Achieved a butt joint using any available methods of sampling collect mail number and base time domain array sampling.
The step in the embodiment of the method shown in step S201, S202, S205 difference corresponding diagram 1 in the present embodiment
S101, S102, S104, its particular content refer to the content of the embodiment of the method shown in corresponding diagram 1, and here is omitted.
Optionally, in another embodiment of the present invention, it is described acquire it is corresponding with the subcarrier initial value
Base time domain array, including：
According to the subcarrier initial value, calculating obtains the base time domain array corresponding with the subcarrier initial value.
Base station record has all subcarrier initial values of narrowband random access channel, for each subcarrier initial value,
Base station obtains base time domain array corresponding with the subcarrier initial value according to subcarrier calculation of initial value.Specifically, base station according to
3GPP agreements calculate and obtain base time domain array corresponding with subcarrier initial value.
Optionally, in another embodiment of the present invention, described according to the subcarrier initial value, calculating is obtained and institute
The corresponding base time domain array of subcarrier initial value is stated, including：
According to the subcarrier initial value, calculating obtains the frequency values corresponding with the subcarrier initial value；
According to the frequency values, calculating obtains the base time domain array corresponding with the frequency values.
Specifically, accessed in user terminal and base station by narrowband random before channel communicated, base station and user terminal it
Between in advance configured following parameter：
ninit:MAC layer is the subcarrier initial value that narrowband random accesses channel choosing；
Narrowband random accesses the frequency domain position of first subcarrier of channel；
Narrowband random accesses channel signal transmission number of repetition；
Narrowband random accesses the cell ID of channel；
Provided according to 3GPP agreements, the subcarrier calculation of initial value that channel is accessed in base station according to narrowband random is obtained and the son
The computational methods of the corresponding frequency values of carrier wave initial value are：
A, calculate frequency domain position initial value nstart(the n in agreementstart) value；
Specifically, defining calculating n in 3GPP agreementsstartFormula：
Wherein, in formulaFor definite value, its size is 12.
Calculated according to above-mentioned formula and obtain frequency domain position initial value nstart。
B, the value for determining two before f (t) functions；
Specifically, according to formula：
F (- 1)=0
It can calculate and obtain two f (0) and f (1) before f (t) functions.Wherein, c (n) is a random sequence, and definition is such as
Under：
C (n)=(x1(n+Nc)+x2(n+Nc))mod2
x1(n+31)=(x1(n+3)+x1(n))mod2
x2(n+31)=(x2(n+3)+x2(n+2)+x2(n+1)+x2(n))mod2
Wherein, Nc=1600, x1(0)=1, x1(n)=0, n=1,2 ..., 30；
Further, according to the value of f (t) first few items, it can successively calculate and obtain all functional values of f (t).
C. calculateValue；
Specifically, according to formula：
Calculating obtains frequencyValue.
D. frequency values are calculatedValue；
Channel signal is accessed for each narrowband random, can be transmittedIt is secondary, and each narrowband random access letter
Road signal includes four group codes, the frequency values of each group codeIt is to determine, so each group code can produce oneAccording to formula：
The frequency values for obtaining each group code can be calculated, wherein
Specifically, according to as defined in agreement formula
Calculating obtains base time domain array.
For example, it is assumed that channel is accessed in base station by narrowband random receives signal r (t),
R (t)=[- 0.8259-0.6687i-0.6108-0.8623i-0.8663-0.5185i
0.5508-0.8169i 0.5389-0.8654i0.8838-0.8294i
-0.7529+0.7623i-0.7779+0.5390i-0.5143+0.6268i
0.6114+0.8397i 0.8801+0.7188i 0.8736+0.5138i
-0.8830+0.7715i-0.6755+0.8860i-0.8031+0.6526i
0.5630+0.7973i 0.8062+0.8882i0.6569+0.8181i
-0.8829-0.7622i-0.5747-0.6942i-0.5685-0.6959i
0.8201-0.7824i0.6782-0.5568i0.5127-0.7585i]
R (t) is 24*1 array.Simultaneously, it is assumed that user terminal has agreed as follows configuration parameter with base station：
ninit:MAC layer is that the subcarrier initial value of narrowband random access channel choosing takes 0；
The frequency domain position of narrowband random access first subcarrier of channel takes 0；
Narrowband random access channel signal transmission number of repetition takes 2；
The cell ID of narrowband random access channel takes 0；
When taking ninitWhen=0, it can be calculated and obtained according to step S302
T=1Ts is taken, 2Ts, tri- values of 3Ts (take three values not influence result, to be only used as citing) here, according to step
S303, can obtain base time domain array A：
A (i, t)=[- 0.7071-0.7071i-0.6535-0.7570i-0.5963-0.8028i
0.7071-0.7071i0.7565-0.6540i0.8018-0.5975i
-0.7071+0.7071i-0.7534+0.6575i-0.7963+0.6049i
0.7071+0.7071i0.6569+0.7539i0.6037+0.7972i
-0.7071+0.7071i-0.7514+0.6598i-0.7926+0.6098i
0.7071+0.7071i0.6592+0.7519i0.6086+0.7935i
-0.7071-0.7071i-0.6558-0.7549i-0.6012-0.7991i
0.7071-0.7071i0.7544-0.6564i0.7982-0.6025i]
Further, the base time domain array obtained according to calculating, signal r is judged according to technical scheme of the embodiment of the present invention
(t) whether be false-alarm signal subsequent treatment, in addition to：
R (t) arrays are divided, can be obtained
R (i, t)=[- 0.8259-0.6687i-0.6108-0.8623i-0.8663-0.5185i
0.5508-0.8169i 0.5389-0.8654i0.8838-0.8294i
-0.7529+0.7623i-0.7779+0.5390i-0.5143+0.6268i
0.6114+0.8397i 0.8801+0.7188i 0.8736+0.5138i
-0.8830+0.7715i-0.6755+0.8860i-0.8031+0.6526i
0.5630+0.7973i 0.8062+0.8882i0.6569+0.8181i
-0.8829-0.7622i-0.5747-0.6942i-0.5685-0.6959i
0.8201-0.7824i0.6782-0.5568i0.5127-0.7585i]
According to ninit+ 1=1 withMake comparisons, obtain
R (t)=[- 0.8259-0.6687i-0.6108-0.8623i-0.8663-0.5185i]
B (t)=[- 0.7071-0.7071i-0.6535-0.7570i-0.5963-0.8028i]
For B arrays and r arrays, modulus value is calculated：
B (t) and r (t) dot product p (t)=[0.1112+1.0568i-0.2536+1.0259i 0.1003+1.0046i]
P (t)=[1.0626 1.0568 1.0096]；I=1.0430
Due to I=1.043>T=0.937, it is determined that have sent NPRACH signals
Optionally, in another embodiment of the present invention, it is described acquire it is corresponding with the subcarrier initial value
Base time domain array, including：
Called from the storage device of the base station and obtain the base time domain array corresponding with the subcarrier initial value；Its
In, preserve what is calculated in advance in the storage device of the base station, each of channel is accessed with the narrowband random
The corresponding base time domain array of individual subcarrier initial value.
Specifically, because base station obtains the calculating process of base time domain array according to subcarrier calculation of initial value, being connect with base station
The signal of receipts is unrelated, i.e., base time domain array is solely dependent upon the subcarrier initial value that narrowband random accesses channel used in base station.
Therefore, base station can access all subcarrier initial values of channel according to narrowband random in advance, and calculating obtains all base time domains
Array, and being saved in storage device, when needing the signal of reception and base time domain array carrying out error calculation, directly from depositing
The base time domain array being previously stored is called in storage device, it is not necessary in error calculation, then calculate base time domain number in real time
Group, reduces base station and handles workload in real time, improves base station operation efficiency.
It should be noted that base station calculated in advance obtains what is introduced in the computational methods and a upper embodiment of base time domain array
The method that base station receives calculating base time domain array in real time after signal is identical.
Shown in Figure 3 the embodiment of the invention discloses a kind of base station, the base station includes：
Signal receiving unit 301, for receiving the signal in narrowband random access channel；
Processing unit 302, the subcarrier initial value of channel is accessed for traveling through the narrowband random, a son is often traversed
During carrier wave initial value, the base time domain array corresponding with the subcarrier initial value is acquired；
Computing unit 303, for carrying out point multiplication operation processing to the signal and the base time domain array, obtains modulus value knot
Really；
Processing unit 304 is contrasted, for by the modulus value result, the modulus value threshold value for obtaining and storing with precalculating to be carried out
Whether contrast, it is false-alarm signal to judge the signal；
If the modulus value result is more than the modulus value threshold value, it is not false-alarm signal to confirm the signal, stops traversal
The narrowband random accesses the subcarrier initial value of channel；
If travel through each subcarrier initial value of the narrowband random access channel, judge to calculate obtained mould
Value result is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.
Specifically, the specific works content of the unit in the present embodiment, refers to the interior of corresponding embodiment of the method
Hold, here is omitted.
Optionally, in another embodiment of the present invention, processing unit 302 is acquired and the subcarrier initial value
During corresponding base time domain array, specifically for：
According to the subcarrier initial value, calculating obtains the base time domain array corresponding with the subcarrier initial value.
Specifically, the specific works content of the processing unit 302 in the present embodiment, refers to corresponding embodiment of the method
Content, here is omitted.
Optionally, in another embodiment of the present invention, processing unit 302 is calculated according to the subcarrier initial value
When obtaining the base time domain array corresponding with the subcarrier initial value, specifically for：
According to the subcarrier initial value, calculating obtains the frequency values corresponding with the subcarrier initial value；
According to the frequency values, calculating obtains the base time domain array corresponding with the frequency values.
Specifically, the specific works content of the processing unit 302 in the present embodiment, refers to corresponding embodiment of the method
Content, here is omitted.
Shown in Figure 4 the embodiment of the invention discloses another base station, the base station includes：
Memory 401 and processor 402；
Wherein, memory 401 is connected with processor 402, for the data produced in storage program and program operation process；
Processor 402, for by the program in run memory 401, realizing following functions：
Receive the signal in narrowband random access channel；The subcarrier initial value that the narrowband random accesses channel is traveled through,
When often traversing a subcarrier initial value, the base time domain array corresponding with the subcarrier initial value is acquired；To institute
State signal and carry out point multiplication operation processing with the base time domain array, obtain modulus value result；By the modulus value result, with precalculating
The modulus value threshold value for obtaining and storing is contrasted, and whether judge the signal is false-alarm signal；If the modulus value result is more than
The modulus value threshold value, then it is not false-alarm signal to confirm the signal, stops the subcarrier that the traversal narrowband random accesses channel
Initial value；If travel through each subcarrier initial value of the narrowband random access channel, judge to calculate obtained mould
Value result is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.
Specifically, the specific works content of the various pieces in the present embodiment, refers to the interior of corresponding embodiment of the method
Hold, here is omitted.
Optionally, in another embodiment of the present invention, processor 402 is additionally operable to：
Processing is sampled to the signal, sampled signal is obtained；And processing is sampled to the base time domain array,
Obtain array of sampling；Point multiplication operation processing is carried out with the sampling array to the sampled signal, modulus value result is obtained.
Specifically, the specific works content of the processor 402 in the present embodiment, refers to the interior of corresponding embodiment of the method
Hold, here is omitted.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (10)
1. a kind of method for detecting false-alarm signal, it is characterised in that applied to base station, this method includes：
Receive the signal in narrowband random access channel；
The subcarrier initial value that the narrowband random accesses channel is traveled through, when often traversing a subcarrier initial value, is obtained
To the base time domain array corresponding with the subcarrier initial value；
Point multiplication operation processing is carried out to the signal and the base time domain array, modulus value result is obtained；
By the modulus value result, the modulus value threshold value for obtaining and storing with precalculating is contrasted, judge the signal whether be
False-alarm signal；
If the modulus value result is more than the modulus value threshold value, it is not false-alarm signal to confirm the signal, stops traversal described
Narrowband random accesses the subcarrier initial value of channel；
If travel through each subcarrier initial value of the narrowband random access channel, judge to calculate obtained modulus value knot
Fruit is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.
2. according to the method described in claim 1, it is characterised in that at the beginning of the subcarrier of the narrowband random access channel is traveled through
Initial value, when often traversing a subcarrier initial value, acquires the base time domain array corresponding with the subcarrier initial value
Afterwards, this method also includes：
Processing is sampled to the signal, sampled signal is obtained；And processing is sampled to the base time domain array, obtain
Sampling array；
Point multiplication operation processing is carried out with the sampling array to the sampled signal, modulus value result is obtained.
3. according to the method described in claim 1, it is characterised in that it is described acquire it is corresponding with the subcarrier initial value
Base time domain array, including：
According to the subcarrier initial value, calculating obtains the base time domain array corresponding with the subcarrier initial value.
4. method according to claim 3, it is characterised in that described according to the subcarrier initial value, calculating obtain with
The corresponding base time domain array of the subcarrier initial value, including：
According to the subcarrier initial value, calculating obtains the frequency values corresponding with the subcarrier initial value；
According to the frequency values, calculating obtains the base time domain array corresponding with the frequency values.
5. according to the method described in claim 1, it is characterised in that it is described acquire it is corresponding with the subcarrier initial value
Base time domain array, including：
Called from the storage device of the base station and obtain the base time domain array corresponding with the subcarrier initial value；Wherein,
Preserve what is calculated in advance in the storage device of the base station, each height of channel is accessed with the narrowband random
The corresponding base time domain array of carrier wave initial value.
6. a kind of base station, it is characterised in that including：
Signal receiving unit, for receiving the signal in narrowband random access channel；
Processing unit, the subcarrier initial value of channel is accessed for traveling through the narrowband random, at the beginning of often traversing a subcarrier
During initial value, the base time domain array corresponding with the subcarrier initial value is acquired；
Computing unit, for carrying out point multiplication operation processing to the signal and the base time domain array, obtains modulus value result；
Processing unit is contrasted, for by the modulus value result, the modulus value threshold value for obtaining and storing with precalculating to be contrasted, sentenced
Whether the signal that breaks is false-alarm signal；
If the modulus value result is more than the modulus value threshold value, it is not false-alarm signal to confirm the signal, stops traversal described
Narrowband random accesses the subcarrier initial value of channel；
If travel through each subcarrier initial value of the narrowband random access channel, judge to calculate obtained modulus value knot
Fruit is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.
7. base station according to claim 6, it is characterised in that the processing unit acquires initial with the subcarrier
When being worth corresponding base time domain array, specifically for：
According to the subcarrier initial value, calculating obtains the base time domain array corresponding with the subcarrier initial value.
8. base station according to claim 7, it is characterised in that the processing unit is according to the subcarrier initial value, meter
When calculation obtains the base time domain array corresponding with the subcarrier initial value, specifically for：
According to the subcarrier initial value, calculating obtains the frequency values corresponding with the subcarrier initial value；
According to the frequency values, calculating obtains the base time domain array corresponding with the frequency values.
9. a kind of base station, it is characterised in that including：
Memory and processor；
Wherein, the memory is connected with the processor, for the data produced in storage program and program operation process；
The processor, for by running the program in the memory, realizing following functions：
Receive the signal in narrowband random access channel；Travel through the subcarrier initial value that the narrowband random accesses channel, every time
When going through to a subcarrier initial value, the base time domain array corresponding with the subcarrier initial value is acquired；To the letter
Number with the base time domain array carry out point multiplication operation processing, obtain modulus value result；By the modulus value result, obtained with precalculating
Whether and the modulus value threshold value stored is contrasted, it is false-alarm signal to judge the signal；If the modulus value result is more than described
Modulus value threshold value, then it is not false-alarm signal to confirm the signal, and the subcarrier for stopping the traversal narrowband random access channel is initial
Value；If travel through each subcarrier initial value of the narrowband random access channel, judge to calculate obtained modulus value knot
Fruit is not more than the modulus value threshold value, then it is false-alarm signal to confirm the signal.
10. base station according to claim 9, it is characterised in that the processor is additionally operable to：
Processing is sampled to the signal, sampled signal is obtained；And processing is sampled to the base time domain array, obtain
Sampling array；Point multiplication operation processing is carried out with the sampling array to the sampled signal, modulus value result is obtained.
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Effective date of registration: 20190412 Address after: 430205 No. 88, Academy of Posts Road, Hongshan District, Wuhan City, Hubei Province Applicant after: Wuhan Hongxin Communication Technology Co., ltd. Address before: 100085 No. 1 Building, No. 5 Hospital, Shangdi East Road, Haidian District, Beijing (Beacon Fire Science and Technology Building) Applicant before: Beifang Fenghuo Tech Co., Ltd., Beijing |
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Application publication date: 20170908 |