CN103297369B - In wireless network signal, define method and the relevant apparatus of signal sequence - Google Patents
In wireless network signal, define method and the relevant apparatus of signal sequence Download PDFInfo
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Abstract
The present invention relates to define method and the relevant apparatus of signal sequence in a wireless network signal, its for one or the wireless network signal of multi-antenna transmission carry out matched filtering to provide a matching value to distribute, matching value is distributed and carries out rolling average to provide an aggregate-value to distribute, and in distributing, this aggregate-value searches peak value, provide a center sequential with the sequential occurring according to peak value, the signal sequence that defines again this wireless network signal according to center sequential, for example, say symbol border.
Description
Technical field
The invention relates to a kind of method and relevant apparatus that defines signal sequence in wireless network signal, and specialDo not relate to a kind of method and relevant dress that can define symbol border in the wireless network signal of multi-antenna transmissionPut.
Background technology
Wireless network can carry out package, data, message, instruction, voice, audio-visual crossfire with wireless network signalExchange, interconnected, communication and/or broadcast, become one of most important Netcom technology in modern information society. ItsIn, the wireless network that can realize multiple-input and multiple-output (multi-inputmulti-output, MIMO) technology can beUnder the situation of the outer frequency range of occupying volume, do not promote network capacity (networkcapacity), increase data transmission rate, fallLow error rate, promote disturb resistivity, utilize beam forming (beam-forming) improvement directive property and/orStrengthen the resistivity to channel attenuation, become the Research Emphasis of modern wireless network. For example, based onThe radio area network of IEEE802.11n standard, has included MIMO technique in. How defeated in many inputsIn the wireless network going out, same transmission ends can be provided with multiple antennas, synthetic wireless to utilize multiple antennas to sendNetwork signal; Same receiving terminal also can arrange one or more antenna to be believed to receive the wireless network being sent by transmission endsNumber.
In the time that transmission ends is sent wireless network signal, can in wireless network signal, draw according to default signal sequenceSeparate the different periods, for example time slot (timeslot), symbol, frame etc.; Day part carries individually separatelyWaveform, message and/or data. For example, at orthogonal frequency division multiplex (MUX) (OFDM, OrthogonalFrequencyDivisionMultiplexing), in wireless network, wireless network signal can mark off differentOrthogonal frequency division multiplex (MUX) symbol (OFDMsymbol); In each orthogonal frequency division multiplex (MUX) symbol, can be with multiple frequenciesThe orthogonal subcarrier (sub-carrier) of rate carries numerical digit data. When receiving terminal receives after wireless network signal, needRebuild the signal sequence of wireless network signal so that and signal sequence synchronously correct solution read wireless network signalIn the message or the data that carry. For example, in orthogonal frequency division multiplex's wireless network, signal sequence just reflectsThe symbol border of orthogonal frequency division multiplex (MUX) symbol; Receiving terminal must pick out symbol border, and correctly solution is readThe numerical digit data that each orthogonal frequency division multiplex (MUX) symbol carries.
In order to make receiving terminal can rebuild the signal sequence of wireless network signal, open the beginning at each package of wireless network signalTime, transmission ends can add the sequencing signal of synchronous use in wireless network signal. The content of this sequencing signal (for exampleIts waveform and/or its frequency spectrum) be predefined according to wireless network standards; Therefore, for receiving terminal, thisThe content of sequencing signal is known. When receiving terminal picks out after this sequencing signal in wireless network signal, just canUse the signal sequence that opens beginning wireless network signal, make the border of day part thereafter, to understand in follow-up day partData, message. For example, in orthogonal frequency division multiplex's wireless network signal, its package above(preamble) short (shortpreamble) the above sequence in can be considered sequencing signal; Short sequence aboveIn include above short that a plurality of contents repeat, can be used for timing synchronization.
In the time that a transmission ends will be sent wireless network signal with many antennas, each antenna can transmit other Dan Tian separatelyLine wireless signal, and the wireless network signal that receiving terminal is received is by these single-antenna wireless signal synthesizeds. RespectivelyIn the single-antenna wireless signal of antenna, include sequencing signal separately; Become for fear of unexpected wave beamType, transmission ends can between the sequencing signal of different antennae, introduce circulation offset delay (cyclicshiftdelay,CSD). But, in the time that receiving terminal is wanted the sequencing signal in identification wireless network signal, due to wireless network signalThe middle sequencing signal that has mixed different antennae, the receiving terminal of known technology cannot stably determine signal sequence. LiftExample, at a time, if the single-antenna wireless signal of one first antenna is stronger, known receiving terminal can foundationThe sequencing signal deciding one first signal sequential of the first antenna; But, in another moment, as the Dan Tian of the second antennaLine wireless signal is stronger, when the sequencing signal of foundation the second antenna is stipulated out a secondary signal by known receiving terminalOrder. Between the sequencing signal due to two antennas, there is circulation offset delay, the first signal sequential obtaining accordingly and the second letterAlso difference to some extent of number sequential; In other words, the signal sequence of receiving terminal cannot be resisted the letter between different antennae con vigoreNumber strong and weak variation.
Summary of the invention
Only have in the application of single antenna in transmission ends, receiving terminal can utilize matched filtering (matchfiltering)Technology picks out the sequencing signal in wireless network signal. Receiving terminal can be set respectively a coupling for different time pointsScope, and in matching range corresponding to each time point according to the product accumulative total of wireless network signal and a preset signalsFor each time point provides the matching value of a correspondence. Gather the matching value that different time points are corresponding and can form a matching value distribution.In matching value distributes, search peak value, can in wireless network signal, pick out the sequential that sequencing signal occurs, enterAnd the signal sequence of decision wireless network signal. But, if wireless network signal is closed by the wireless signal of many antennasBecome, matching value there will be multiple local peakings in distributing, and the peak value that cannot distribute by matching value provides stableSignal sequence.
Therefore, the present invention will improve matched filtering technique, provide a kind of can be in the application of one or many antenna stablyDefine the technology of signal sequence.
One of object of the present invention is to provide a kind of method that is applied to wireless network receiving terminal, with in a wireless networkIn signal, define a signal sequence; It comprises: carry out a matched filtering so that a coupling to be provided for wireless network signalValue distributes, and matching value is distributed and carries out a rolling average (movingaverage) to provide an aggregate-value to distribute,And provide a center sequential according to the sequential that in aggregate-value distribution, peak value occurs, and define wireless network according to center sequentialThe signal sequence (as symbol border) of network signal.
In one embodiment, in the time that center sequential is provided, aggregate-value can be distributed and compare with a critical value, according to tiring outEvaluation distributes provides a sequential upper limit and a sequential lower limit with the intersection time point of critical value, and according to the sequential upper limit and timeThe average setting center sequential of order lower limit. In one embodiment, the peak value size that can distribute according to aggregate-value is with oneThe product of critical value ratio is set critical value.
In one embodiment, in the time carrying out rolling average, set respectively the accumulative total scope of a correspondence for different time points,And in accumulative total scope corresponding to each time point, add up matching value, so that the aggregate-value of a correspondence to be provided for each time point.
Another object of the present invention is to provide a kind of device that is applied to a wireless network receiving terminal, in order at wireless networkIn network signal, define a signal sequence; It includes a matched filtering module, an aggregate-value module, a peak value moduleWith a tfi module. Matched filtering module is carried out matched filtering to provide matching value to distribute for wireless network signal.Aggregate-value module distributes and carries out rolling average to provide aggregate-value to distribute matching value. Peak value module is divided according to aggregate-valueThe sequential that occurs peak value in cloth provides a center sequential. Tfi module defines wireless network signal according to center sequentialSignal sequence.
For there is to better understanding above-mentioned and other aspect of the present invention, preferred embodiment cited below particularly, and coordinateAccompanying drawing, is described in detail below:
Brief description of the drawings
That Fig. 1 illustrates is a kind of embodiment that carries out matched filtering.
Schematically relatively single transmission antenna and network signal under multiple transmission antenna and corresponding coupling thereof of Fig. 2Filtering result.
What Fig. 3 illustrated is the rolling average device according to one embodiment of the invention.
What Fig. 4 illustrated is the running result of Fig. 3 rolling average device.
What Fig. 5 illustrated is by the signal of rolling average result estimation center sequential according to one embodiment of the inventionFigure.
What Fig. 6 illustrated is the device according to one embodiment of the invention.
Main element symbol description
10: matched filter
12: delayer
14: multiplier
16: conjugate complex number calculator
18,24: integrating instrument
22: buffer
26: matching value distributes
28: aggregate-value distributes
30: rolling average device
32: matched filtering module
34: aggregate-value module
36: peak value module
38: tfi module
R (.): network signal
R (.): preset signals
A (.): matching value
S (.): aggregate-value
R (n) _ 1, r (n) _ 2, r (n) _ m, r (n) _ M: single-antenna wireless signal
TD[1], tD[2], tD[m], tD[M]: sequencing symbol
X (.): sampling value
Eq1, eq2: equation
S_TH: critical value
Nc, nc_e: center time point
N_min, n_max, n_peak: time point
Detailed description of the invention
Please refer to Fig. 1, that it is illustrated is the embodiment of a matched filter 10. Matched filter 10 is for oneNetwork signal r (n) carries out matched filtering; Network signal r (n) can be received by wireless network receiving terminal wirelessNetwork signal. For example, after receiving terminal is with antenna reception wireless network signal, comprise smear, band logical and/Or low-pass filter signal, can be fallen and be turned (down-conversion) to intermediate frequency or fundamental frequency signal, and be gotSample/digitisation, and the signal of its gained can be used as network signal r (n). Network signal r (n) can be a plural number(complex) signal, its real part (realpart) and imaginary part (imaginarypart) corresponding wireless network respectivelyParallel phase place (in-phase) in network signal part and quadrature phase (quadrature-phase) are partly.
Matched filter 10 comprises multiple delayers 12, multiplier 14, conjugate complex number calculator 16 and an accumulative totalDevice 18, in order to realize matched filtering; Its for different time point n set respectively a matching range (as 0 to(N-1)), and in matching range corresponding to each time point n to signal r (n) conjugate complex number with a preset signals R (k)The product of R* (k) adds up, to provide the matching value A (n) of a correspondence for each time point n. As equation eq1 instituteShow, matched filter 10 can be taken advantage of N the network signal value r (n) after a certain time point n respectively to r (n+N-1)To the conjugate complex number R* (0) of R (N-1) to R* (N-1), and add up accumulative total with N preset signals value R (0),Its result is matching value A (n). The Corresponding matching value A (n) that gathers different time point n, can form a matching value and divideCloth.
In the matched filtering of carrying out at matched filter 10, preset signals R (n) is the known sequencing signal of content;In other words, carry out the object of matched filtering be in network signal r (n), to pick out sequencing to matched filter 10Signal.
Please refer to Fig. 2, what it was illustrated carries out matched filtering to network signal r (n) in the time that number of antennas is differentResult. In the time that transmission ends is only transmitted wireless network signal with single antenna, this single transmission antenna can send single antennaWireless signal r (n) _ 1, and the network signal r (n) that receiving terminal receives is by single-antenna wireless signal r (n) _ 1Form. In single-antenna wireless signal r (n) _ 1, be provided with many sequencing symbol tD[1] to form sequencing signal. For example andSpeech, in orthogonal frequency division multiplex's wireless network, sequencing symbol tD[1] can be shortly (to be called again Short Training aboveSymbol). As shown in Figure 2, each sequencing symbol tD[1] in have N sampling value x (1) to x (N); When receivedAfter termination is received, signal value x (1) to x (N) just respectively corresponding time point (t+1) to (t+N) network signal value r (t+1) extremelyR (t+N). Because the content of sequencing symbol is predefined according to wireless network standards institute, therefore its sampling value x (1)To x (N) fix, known; In the time that receiving terminal carries out Fig. 1 matched filtering, the preset signals in equation eq1Value R (0) sets to x (N) according to sampling value x (1) to R (N-1), and matching value distribution 20a in Fig. 2Be the result that network signal r (n) is carried out to matched filtering. For sequencing symbol tD[1], matching value distribution 20aThere will be a peak value. In other words, the appearance of peak value, represents that matched filtering picks out from network signal r (n)Sequencing symbol, and the sequential that peak value occurs is the sequential of corresponding sequencing symbol; According to the sequential of sequencing symbol, receiveEnd just can be network signal r (n) and rebuilds the signal sequence of its period division, for example, say time slot, symbol, frame (frame)And/or the border of orthogonal frequency division multiplex (MUX) symbol.
On the other hand, if transmission ends is provided with first and second antenna, and send respectively with the first antenna and the second antennaSingle-antenna wireless signal r (n) _ 1 and r (n) _ 2, the network signal r (n) of receiving terminal reception gained can be by these twoSingle-antenna wireless signal r (n) _ 1 and r (n) _ 2 synthesized, for example say r (n)=h1*r (n) _ 1+h2*r (n) _ 2,Wherein, h1 and h2 are synthetic weight. Due to the distance between two antennas and the receiving terminal of transmission ends, direction,Noise and channel attenuation are all variant, therefore weight h1 and h2 can be different, and its numerical values recited be also withMachine. In single-antenna wireless signal r (n) _ 1 and r (n) _ 2, include respectively the sequencing symbol tD[1 of multiple repetitions] withTD[2], sequencing symbol tD[1] in have N sampling value x (1) to x (N). Relatively, because transmission ends can be secondIn the single-antenna wireless signal r (n) _ 2 of antenna, introduce circulation offset delay, therefore sequencing symbol tD[2] front L getSample value is respectively sampling value x (N-L+1) to x (N), and rear (N-L) individual sampling value is respectively sampling value x (1) extremelyX (N-L). In other words, sequencing symbol tD[2] in sampling value be to x (N) circulation offset numbers by sampling value x (1)Order L gained, and number L is length time delay of corresponding circulation offset delay.
Because network signal r (n) is by single-antenna wireless signal r (n) _ 1 and r (n) _ 2 synthesized, therefore time point (t+1)Respectively to x (L), sampling value by sampling value x (1) to L the network signal value r (t+1) of (t+L) to r (t+L)X (N-L+1) is to x (N) synthesized, i.e. network signal value r (t+n)=h1*x (n)+h2*x (N-L+n), to n=1To L. At follow-up time point (t+L+1), to (t+N), rear (N-L) individual network signal value r (t+L+1) divides to r (t+N)Not to x (N), sampling value x (1) to x (N-L) synthesized, i.e. network signal value r (t+n) by sampling value x (L+1)=h1*x (n)+h2*x (n-L), to n=(L+1) to N.
But, in the time that receiving terminal carries out the matched filtering of Fig. 1, the preset signals value R (0) in equation eq1 extremelyR (N-1) remains according to sampling value x (1) and sets to x (N), and the matching value distribution 20b in Fig. 2 is rightThe result that network signal r (n) under two antennas carries out matched filtering. The sequencing symbol of corresponding time point (t+1) to (t+N)TD[1] and tD[2], will there are former and later two local peakings in matching value distribution 20a, Zhe Liangge local peaking occursTime difference i.e. the quantity L of corresponding circulation skew. The peak value size of Zhe Liangge local peaking can be subject to weight h1 and h2Impact, and weight h1 and h2 can change randomly because of random (random) decline of noise and/or passage,So the peak value magnitude relationship between Liang Ge local peaking also can change randomly, i.e. the peak value size of last local peakingMay be higher or lower than the peak value size of succeeding switch portion peak value. Therefore, if to continue to use single antenna situation and at thisBetween Liang Ge local peaking, compare a higher peak value and use reconstruction signal sequential, this signal sequence can be alsoChange at random and unsettled.
Situation by two antennas can be promoted the situation of learning more antennas. If transmission ends is with M antenna (MBe greater than 1) send respectively M single-antenna wireless signal, m (m can equal 2 to M wherein itOne) the sequencing symbol tD[m of single-antenna wireless signal] in, in its N sampling value before L sampling value of (m-1) *Can be the sampling value x (N-(m-1) * L+1) of circulation skew to x (N), follow-up (N-(m-1) * L) individual sampling value is dividedWei sampling value x (1) to x (N-(m-1) * L). The network signal r (n) that receives gained due to receiving terminal is single by MAntenna wireless signal synthesized, therefore the sequencing symbol tD[1 for time point (t+1) to (t+N)] to tD[M], in netIn network signal r (n), carry out matched filtering gained matching value distribute in there will be M local peaking; This M officePeak value size correlation between portion's peak value is also random, cannot relatively come according to the peak value size between local peakingThe signal sequence of reconstruction of stability.
Provide stable signal for M the local peaking that will utilize M antenna to form in matching value distributes timeOrder, meeting of the present invention further distributes and averages matching value, to integrate this M local peaking. Please refer to figure3, what it was illustrated is according to one embodiment of the invention to the matching value rolling average device that carries out rolling average that distributes30. Rolling average device 30 comprises a buffer 22 and an integrating instrument 24. Rolling average device 30 is for certainOne time point n sets the accumulative total scope (n-Q) of a correspondence to (n+P), and adds up matching value in this accumulative total scopeA (n-Q) is to A (n+P), for time point n provides the aggregate-value S (n) of a correspondence, as shown in equation eq2; Wherein,Gain W can be a constant value, for example, be 1 or 1/ (P+Q). Quantity P and Q can be according to quantity M and LAnd stipulate, for example say to make quantity and (P+Q) convergence or be slightly larger than quantity (M-1) * L; Quantity P and Q can phasesDeng or different, one of them of quantity P and Q can equal 0. To each time point n, when buffer 22 can be kept inThe matching value A (n-Q) of point (n-Q) to (n+P) is to A (n+P), and integrating instrument 24 can be to these matching values A (n-Q)Add up to A (n+P), to draw corresponding aggregate-value S (n). Gather aggregate-value corresponding to different time point nS (n), just can form an aggregate-value and distribute.
Please refer to Fig. 4, what it illustrated is according to one embodiment of the invention by a matching value distribute 26 obtain rightAnswer the schematic diagram of aggregate-value distribution 28. In different time point n1, n2 and n3 respectively to accumulative total scope (n1-Q)To (n1+P), (n2-Q) to (n2+P) with (n3-Q) to the matching value A (n1-Q) in (n3+P) to A (n1+P),A (n2-Q) adds up to A (n2+P) and A (n3-Q) to A (n3+P), just can obtain time point n1, n2 andAggregate-value A (n1), the A (n2) of n3 and A (n3). As shown in Figure 4, integrate through the rolling average of Fig. 3, evenMatching value distributes in 26 M local peaking (quantity M can be more than or equal to 1), the tiring out of rolling average gainedEvaluation distribution 28 also only there will be single peak value.
Continuity Fig. 1 to Fig. 4, please continue to refer to Fig. 5; What Fig. 5 illustrated is profit according to one embodiment of the inventionCarry out to determine for receiving signal r (n) schematic diagrames of signal sequence with aggregate-value distribution 28. As discussed in Figure 2, connectCollection of letters r (n) can be by the single-antenna wireless signal r (n) _ 1 of M antenna ..., r (n) _ m to r (n) _ M instituteSynthesize; At single-antenna wireless signal r (n) _ 1 to each sequencing symbol tD[1 in r (n) _ M] to tD[M] between,Can in matching value distribution 26, form M local peaking because of mutual circulation offset delay. This M localRespectively corresponding sequencing symbol tD[1 of peak value] to tD[M] circulation skew B0T, i.e. each sequencing symbol tD[1] extremelyTD[M] in sampling value x (1) open beginning sequential. Therefore, if can find out between first and M local peakingCenter time point nc, just can determine accordingly the border (beginning and the time point finishing as opened) of each sequencing symbol, and then determineReceive the signal sequence of signal r (n). And the present invention will utilize aggregate-value distribution 28 to estimate center time point nc.
As shown in Figure 5, in one embodiment of this invention, it is critical that the present invention can be aggregate-value distribution 28 settings oneValue S_TH, and distribution 28 compares with critical value S_TH for aggregate-value, to distribute 28 according to aggregate-valueProvide a sequential upper limit and a sequential lower limit with the intersection time point of critical value S_TH, as time point n_max withN_min. According to this sequential upper limit and sequential lower limit, just can try to achieve a center time point nc_e (while can be considered a centerOrder), Er Ci center time point nc_e can be used as the estimated value of center time point nc. For example, center time point nc_eCan be the average of the sequential upper limit and sequential lower limit: nc_e=(n_min+n_max)/2. Utilize center time point nc_eWith known quantity L, just can determine the sequential of each sequencing symbol, and and then determine network signal r (n) signal timeOrder, reaches object of the present invention.
In one embodiment of this invention, critical value S_TH can be the peak value size according to aggregate-value distribution 28(being aggregate-value S (n_peak)) and determine. For example, can be according to the numerical values recited of peak value S (n_peak)Set critical value S_TH with the product of a critical value ratio R, as S_TH=R*S (n_peak); Wherein, faceDividing value ratio R can equal a default constant.
In another embodiment of the present invention, the time point n_peak can direct basis peak value occurring is used as centerThe estimated value of time point nc, and and then determine network signal r (n) signal sequence, reach object of the present invention.
Please refer to Fig. 6, what it was illustrated is the device 40 according to one embodiment of the invention, and it can be arranged at a nothingSpider lines receiving terminal (not shown), uses the network signal r (n) that thinks receiving terminal reception gained to define signal sequence.Device 40 includes a matched filtering module 32, an aggregate-value module 34, a peak value module 36 and a sequential mouldPiece 38; Matched filtering module 32, aggregate-value module 34, peak value module 36 are sequentially connected with tfi module 38Couple. Matched filtering module 32 realizes the matched filter 10 of Fig. 1, mates filter for network signal r (n)Ripple, distributes with the time domain that matching value A (n) is provided. Aggregate-value module 34 realizes the rolling average device 30 of Fig. 3,Rolling average is carried out in distribution to matching value A (n), to provide aggregate-value S (n) and time domain thereof to distribute. Based on Fig. 5Shown principle, peak value module 36 occurs that the sequential of peak value provides center time point nc_e in distributing according to aggregate-valueUsing as center sequential. 38 of tfi modules define the signal sequence of network signal r (n) according to center sequential. DressPut each module available hardware, software and/or firmware in 40 or it combines to be achieved. For example, availableHardware logic circuit is realized matched filtering module 32, aggregate-value module 34 etc.
In summary, in the application of multiple transmission antenna, the technology based on matched filtering can be subject to matching value and distributePeak value size impact and the network signal that cannot stably receive for wireless network receiving terminal provides signal sequence. Phase, multiple peak values that the present invention can distribute matching value are integrated into the single peak value in aggregate-value distribution, thereforeCan be signal sequence stable basis is provided, avoid affecting letter because of local peaking's size random variation of matched filteringThe reconstruction of number sequential, and then make wireless network receiving terminal can correctly understand the wireless network signal that it receives.
In sum, although the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when doingVarious changes and retouching. Therefore, protection scope of the present invention is when being defined and be as the criterion by claims.
Claims (18)
1. in a wireless network signal, define a method for a signal sequence, this wireless network signal is synthetic by multiple single-antenna wireless signals, and those single-antenna wireless signals are sent by multiple antennas respectively, and the method comprises:
Carry out a matched filtering to provide a matching value to distribute for this wireless network signal, this matching value distributes and has multiple peak values corresponding to the plurality of single-antenna wireless signal;
This matching value is distributed and carries out a rolling average to provide an aggregate-value to distribute, and this aggregate-value distributes and has single accumulation peak;
The sequential that in distributing according to this aggregate-value, this single accumulation peak occurs provides a center sequential; And
Define this signal sequence of this wireless network signal according to this center sequential.
2. the method for claim 1, is characterized in that, this provides the step of this center sequential to comprise:
Set a critical value;
Relatively this aggregate-value distributes and this critical value, distributes and provides a sequential upper limit and a sequential lower limit with the intersection time point of this critical value according to this aggregate-value; And
According to this sequential upper limit and this center sequential of this sequential lower limit set.
3. method as claimed in claim 2, is characterized in that, the step that this provides this center sequential, also comprises:
According to this center sequential of average setting of this sequential upper limit and this sequential lower limit.
4. method as claimed in claim 2, is characterized in that, the step of this this critical value of setting is set this critical value according to the numerical values recited of this peak value.
5. method as claimed in claim 2, is characterized in that, the step of this this critical value of setting is set this critical value according to the numerical values recited of this peak value and the product of a critical value ratio.
6. the method for claim 1, is characterized in that, this step of carrying out this matched filtering comprises:
Set respectively a matching range for different time points, and in this matching range that respectively this time point is corresponding according to the product accumulative total of this wireless network signal and a preset signals for each this time point provides a corresponding matching value.
7. the method for claim 1, is characterized in that, this step of carrying out this rolling average comprises:
Set respectively the accumulative total scope of a correspondence for different time points, and this matching value of accumulative total in this accumulative total scope corresponding to each this time point, so that the aggregate-value of a correspondence to be provided for each this time point.
8. the method for claim 1, is characterized in that, in the time defining this signal sequence of this wireless network signal according to this center sequential, defines the symbol border of this wireless network signal according to the number of this center sequential and those antennas.
9. the method for claim 1, is characterized in that, the sequencing signal that respectively this single-antenna wireless signal comprises a correspondence, and there is a circulation offset delay between corresponding this sequencing signal of this different single-antenna wireless signals.
10. one kind is applied to the device of a wireless network receiving terminal, in order to define a signal sequence in this wireless network signal, this wireless network signal is synthetic by multiple single-antenna wireless signals, and those single-antenna wireless signals are sent by multiple antennas respectively, and this device comprises:
One matched filtering module, carries out a matched filtering to provide a matching value to distribute for this wireless network signal, and this matching value distributes and has multiple peak values corresponding to the plurality of single-antenna wireless signal;
One aggregate-value module, distributes and carries out a rolling average to provide an aggregate-value to distribute this matching value, and this aggregate-value distributes and has single accumulation peak;
One peak value module, occurs that the sequential of this single accumulation peak provide a center sequential in distributing according to this aggregate-value; And
One tfi module, defines this signal sequence of this wireless network signal according to this center sequential.
11. devices as claimed in claim 10, it is characterized in that, this peak value module is set a critical value, and relatively this aggregate-value distributes and this critical value, to distribute and to provide a sequential upper limit and a sequential lower limit with the intersection time point of this critical value according to this aggregate-value, and according to this sequential upper limit and this center sequential of this sequential lower limit set.
12. devices as claimed in claim 11, is characterized in that, this peak value module is according to this center sequential of average setting of this sequential upper limit and this sequential lower limit.
13. devices as claimed in claim 11, is characterized in that, this peak value module is set this critical value according to the numerical values recited of this peak value.
14. devices as claimed in claim 11, is characterized in that, this peak value module is set this critical value according to the numerical values recited of this peak value and the product of a critical value ratio.
15. devices as claimed in claim 10, it is characterized in that, this matched filtering module is set respectively a matching range for different time points, and in this matching range that respectively this time point is corresponding according to the product accumulative total of this wireless network signal and a preset signals for each this time point provides a corresponding matching value.
16. devices as claimed in claim 10, it is characterized in that, this rolling average module is set respectively the accumulative total scope of a correspondence for different time points, and this matching value of accumulative total in this accumulative total scope corresponding to each this time point, so that the aggregate-value of a correspondence to be provided for each this time point.
17. devices as claimed in claim 10, is characterized in that, this tfi module defines the symbol border of this wireless network signal according to the number of this center sequential and those antennas.
18. devices as claimed in claim 10, is characterized in that, the sequencing signal that respectively this single-antenna wireless signal comprises a correspondence, and there is a circulation offset delay between corresponding this sequencing signal of this different single-antenna wireless signals.
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| TWI575896B (en) * | 2015-12-03 | 2017-03-21 | 晨星半導體股份有限公司 | Signal Detection Method and Device |
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| US5198877A (en) * | 1990-10-15 | 1993-03-30 | Pixsys, Inc. | Method and apparatus for three-dimensional non-contact shape sensing |
| US5218359A (en) * | 1991-08-06 | 1993-06-08 | Kokusai Denshin Denwa Co., Ltd. | Adaptive array antenna system |
| CN1504025A (en) * | 2001-03-15 | 2004-06-09 | 高通股份有限公司 | Symbol recovery from oversampled hard-dencision binary stream |
| CN1797973A (en) * | 2004-12-27 | 2006-07-05 | 三星电子株式会社 | Signal acquisition apparatus and method for reducing false alarm rate |
| CN101313480A (en) * | 2005-09-29 | 2008-11-26 | 高通股份有限公司 | Systems, methods, and apparatus for establishing finger lock state |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5198877A (en) * | 1990-10-15 | 1993-03-30 | Pixsys, Inc. | Method and apparatus for three-dimensional non-contact shape sensing |
| US5218359A (en) * | 1991-08-06 | 1993-06-08 | Kokusai Denshin Denwa Co., Ltd. | Adaptive array antenna system |
| CN1504025A (en) * | 2001-03-15 | 2004-06-09 | 高通股份有限公司 | Symbol recovery from oversampled hard-dencision binary stream |
| CN1797973A (en) * | 2004-12-27 | 2006-07-05 | 三星电子株式会社 | Signal acquisition apparatus and method for reducing false alarm rate |
| CN101313480A (en) * | 2005-09-29 | 2008-11-26 | 高通股份有限公司 | Systems, methods, and apparatus for establishing finger lock state |
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