CN106302267B - A kind of strong diameter channel detection method of list and device - Google Patents
A kind of strong diameter channel detection method of list and device Download PDFInfo
- Publication number
- CN106302267B CN106302267B CN201510237365.0A CN201510237365A CN106302267B CN 106302267 B CN106302267 B CN 106302267B CN 201510237365 A CN201510237365 A CN 201510237365A CN 106302267 B CN106302267 B CN 106302267B
- Authority
- CN
- China
- Prior art keywords
- diameter channel
- channel
- cpich
- strong diameter
- detection
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0204—Channel estimation of multiple channels
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
Abstract
The embodiment of the invention discloses a kind of strong diameter channel detection method of list and devices.Wherein, the described method includes: obtaining the CPICH Common Pilot Channel CPICH sequence of correlation values sampled within the set duration according to the setting sampling period, and the maximum related value corresponding destination sample time point in the sequence of correlation values, wherein the sampling period and unit chip duration have integer multiple relationship；By in the sequence of correlation values, the CPICH correlation of the sampling time point of integral multiple unit chip duration carries out single strong diameter Channel Detection according to the detection parameters as detection parameters early or late than the destination sample time point.Technical solution provided in an embodiment of the present invention can be realized the identification to single strong diameter channel scenario, promote the equalization performance of single strong diameter channel.
Description
Technical field
The present embodiments relate to field of communication technology more particularly to a kind of strong diameter channel detection methods of list and device.
Background technique
It is wirelessly communicated in WCDMA (Wideband Code Division Multiple Access, wideband code division multiple access)
In system, in order to carry out the pulse-shaping of transmitting terminal, receiving end filters out out-of-band noise, uses respectively in transmitting terminal and receiving end
RRC (Root Raised Cosine, root raised cosine) filter with identical filter factor.The two RRC filters can
Be equivalent to a RC (Raised Cosine, raised cosine) filter, guarantee wireless communication system without intersymbol interference.Therefore, exist
When transmission channel is the situation of single strong diameter scene, equivalent channel impulse response is the filter factor of RC filter.
It for WCDMA wireless communication system, is influenced by RC filter, it will usually which transmission channel estimation is become one
A multipath channel.But since RC filter is the filter of no intersymbol interference, channel equalization, such as HSDPA are being carried out
When (High Speed Downlink Packet Access, high-speed slender body theory) channel equalization, channel can wait completely
Effect is single strong diameter channel, is handled according to single diameter.Also, if according to the process flow of normal multipath channel, to every diameter
Channel estimation is carried out, the error of many lower-powered diameter estimations is larger, will affect the performance of channel equalization instead.But it is existing
The detection scheme not provided in technology to single strong diameter channel scenario is provided so that the equalization performance of single strong diameter channel scenario compared with
Difference.
Summary of the invention
The embodiment of the present invention provides a kind of strong diameter channel detection method of list and device, to realize to single strong diameter channel scenario
Identification promotes the equalization performance of single strong diameter channel.
On the one hand, the embodiment of the invention provides a kind of strong diameter channel detection methods of list, this method comprises:
Obtain the CPICH Common Pilot Channel CPICH correlation sampled within the set duration according to the setting sampling period
Maximum related value corresponding destination sample time point in sequence and the sequence of correlation values, wherein the sampling period with
Unit chip duration has integer multiple relationship；
By in the sequence of correlation values, the sampling of integral multiple unit chip duration early or late than the destination sample time point
The CPICH correlation at time point carries out single strong diameter Channel Detection according to the detection parameters as detection parameters.
On the other hand, the embodiment of the invention also provides a kind of strong diameter Channel Detection device of list, which includes:
Acquiring unit is believed for obtaining the public guide frequency sampled within the set duration according to the setting sampling period
Maximum related value corresponding destination sample time point in road CPICH sequence of correlation values and the sequence of correlation values, wherein institute
It states the sampling period and unit chip duration has integer multiple relationship；
Single strong diameter channel detection unit, for by the sequence of correlation values, early or late than the destination sample time point
The CPICH correlation of the sampling time point of integral multiple unit chip duration is carried out as detection parameters according to the detection parameters
Single strong diameter Channel Detection.
Technical solution provided in an embodiment of the present invention, in getting CPICH sequence of correlation values and sequence of correlation values
After maximum related value corresponding destination sample time point, can according in sequence of correlation values early or late than destination sample time point
The CPICH correlation of the sampling time point of integral multiple unit chip duration, to carry out the identification of single strong diameter channel scenario, Ke Yiti
The accuracy of high channel path detection promotes the equalization performance of single strong diameter channel.
Detailed description of the invention
Figure 1A is a kind of time domain impulse response characteristic schematic diagram for the strong diameter channel of list that the embodiment of the present invention one provides；
Figure 1B is a kind of time domain impulse response characteristic schematic diagram for PA channel that the embodiment of the present invention one provides；
Fig. 1 C is a kind of flow diagram for the strong diameter channel detection method of list that the embodiment of the present invention one provides；
Fig. 2 is a kind of flow diagram of the strong diameter channel detection method of list provided by Embodiment 2 of the present invention；
Fig. 3 is a kind of structural schematic diagram for the strong diameter Channel Detection device of list that the embodiment of the present invention three provides；
Fig. 4 A is a kind of channel path testing principle operation schematic diagram that the embodiment of the present invention four provides；
It is a kind of respectively under single strong diameter scene and multipath scenario that Fig. 4 B is that the embodiment of the present invention four provides, repeatedly right
CPICH carries out the normalization correlation power value simulation result schematic diagram that single strong diameter Channel Detection obtains.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
It should be mentioned that some exemplary embodiments are described as before exemplary embodiment is discussed in greater detail
The processing or method described as flow chart.Although operations (or step) are described as the processing of sequence by flow chart,
Many of these operations can be implemented concurrently, concomitantly or simultaneously.In addition, the sequence of operations can be pacified again
Row.The processing can be terminated when its operations are completed, it is also possible to have the additional step being not included in attached drawing.Institute
Stating processing can correspond to method, function, regulation, subroutine, subprogram etc..
It should further be mentioned that the function action being previously mentioned can be attached according to being different from some replace implementations
The sequence indicated in figure occurs.For example, related function action is depended on, each width figure shown in succession actually may be used
Substantially simultaneously to execute or can execute in a reverse order sometimes.
Embodiment one
A kind of strong diameter channel detection method of list is present embodiments provided, this method is applicable to using pilot aided
In the WCDMA wireless communication system of channel estimation technique, receiving end to CPICH Common Pilot Channel (Common Pilot Channel,
CPICH the case where) carrying out single strong diameter channel scenario identification, to be carried out using the recognition result to other channels in transmission channel
Channel estimation and equilibrium.This method can be executed by single strong diameter Channel Detection device, and described device is by software and/or hardware reality
It is existing, it is integrated in receiving end.In the present embodiment, the strong diameter channel of so-called list refers to that path is the channel of single strong diameter.
Firstly, under introducing the strong diameter channel detection method of list provided in this embodiment realization principle.
Figure 1A is a kind of time domain impulse response characteristic (the i.e. RC filter for the strong diameter channel of list that the embodiment of the present invention one provides
Filtering characteristic) schematic diagram.As shown in Figure 1A, the sampling period is 1/2chip (chip), observes the filtering characteristic of RC filter,
Within a shock response period, there are a maximum impact responses in this sampling time point of 0chip, in other ratios
0chip sampling time point early or late integral multiple 1chip sampling time point (as ± 1chip, ± 2chip, ± 3chip and ±
On 4hip), shock response value is 0 or close to 0.
However for multipath channel, due to not being single diameter, therefore its channel estimation characteristic and the strong diameter channel of above-mentioned list
Shock response characteristic is different.Therefore, using the difference, the detection of single strong diameter channel scenario is carried out.
Now by taking a multipath channel quite similar with single strong diameter characteristic of channel as an example, the response characteristic of multipath channel is added
With explanation.The multipath channel is a kind of PA (Packet Access, grouping access) channel, the letter defined in 3GPP agreement
Multidiameter and the power distribution in road are as shown in table 1 below:
Table 1
As can be seen that PA channel and single strong diameter channel are much like: the main diameter power of PA channel is larger, other diameters are relative to master
Diameter delay is smaller, and power is smaller.In the case where the sampling period is 1/2chip, the time domain impulse response characteristic of PA channel is such as
Shown in Figure 1B.
For the shock response of single strong diameter channel, in the sampling time point of integral multiple 1chip early or late than 0chip
Power be 0 or close to 0；And for PA channel, due to there is channel impulse response at 110ns, and 110ns is non-integral multiple
Sampling time point (such as when with 2 times of polydispersity index, sampling period 1/2chip, about 130ns), therefore the position 110ns
The energy of the channel impulse response at place will necessarily be leaked in the integral multiple sampling time point of surrounding, such as 0chip, 1/2chip,
Sampling time points such as 1chip etc..But due to there is the energy of main diameter in 0chip, 1/2chip sampling time point, power is larger
(0dB), and the power of the diameter of the position 110ns is smaller (- 9.7dB), thus will not be to 0chip, ± 1/2chip sampling time point at
Correlated results affect greatly.And the sampling time point of integral multiple 1chip early or late than 0chip sampling time point (such as
± 1chip, ± 2chip, ± 3chip and ± 4hip) on, especially in 1chip 1chip more early than 0chip sampling time point
The position of sampling time point, due to being not affected by the influence of main diameter, so the diameter on the position 110ns is for these sampling time points
The influence for setting correlated results can be showed easily.Therefore, by investigating integral multiple early or late than 0chip sampling time point
The correlated results of the sampling time point of 1chip can identify be channel to be multipath channel or single strong diameter channel on earth, because
These sampling time points investigated are in the response characteristic under multipath channel and the response characteristic difference under single strong diameter channel
It is larger.
For other multipath channels in addition to PA channel, the Channel Impulse at non-integral multiple sampling time point is rung
It answers, the influence of the comparison 0chip sampling time point correlated results of the sampling time point of integral multiple 1chip early or late is more prominent.
In view of this, present embodiments providing a kind of strong diameter channel detection method of list.As shown in Figure 1 C, the present embodiment provides
Single strong diameter channel detection method specifically comprise the following steps S110- step S120.
Step S110, the CPICH correlation sequence sampled within the set duration according to the setting sampling period is obtained
Maximum related value corresponding destination sample time point in column and the sequence of correlation values.
In WCDMA wireless communication system, receiving end can carry out CPICH correlation (CPICH according to the setting sampling period
Correlator sampling).In each sampling time point, receiving end exists to CPICH data received in certain time length window
A CPICH correlation is calculated after descrambling and de-spreading.The duration window is in sliding mode, setting sampling with sampling instant
Period can be considered the sliding step of the window, have integer multiple relationship with unit chip duration.For example, unit chip duration is
N times of sampling period namely sampling period are the 1/N of unit chip duration, N can be take 2,3,4 etc. be greater than 1 integer.Its
In, unit chip duration refers to that the receiving end of CPICH receives the time interval namely CPICH transmission one of two neighboring chip
Time spent by a chip.If above-mentioned duration window is W, W is equal to the time span of k (being greater than or equal to 1) a chip, step
The sampling number in setting duration in S110 is preferably N*W.In the present embodiment, the maximum related value in sequence of correlation values,
The maximum CPICH correlation of mould as in sequence of correlation values.
Step S120, in the sequence of correlation values that will acquire, integral multiple unit chip early or late than destination sample time point
The CPICH correlation of the sampling time point of duration carries out single strong diameter Channel Detection according to detection parameters as detection parameters.
If destination sample time point is X chip, the sampling time of L unit chip duration more early than destination sample time point
Point is (X+L) chip, and the sampling time point of unit chip duration more late than destination sample time point is (X-L) chip.
According to the response characteristic of the strong diameter channel of aforementioned list or multi-path information it is found that maximum related value in sequence of correlation values
Corresponding destination sample time point, it should corresponding to the 0chip sampling time point in Figure 1A or Figure 1B.When than the destination sample
Between put the CPICH correlation of the sampling time point of integral multiple unit chip duration early or late, in single strong diameter channel and multipath channel
Under difference it is more obvious, detected using the value as detection parameters, can effectively identify channel be single strong diameter channel also
It is multipath channel.For example, detecting the time point for sampling time point 1chip more early than destination sample time point
When the mould square of CPICH correlation is less than preset first threshold, determine that CPICH Common Pilot Channel is otherwise more for single strong diameter channel
Diameter channel.Alternatively, for the sampling time point of y (wherein y > 1) chip early or late than destination sample time point, when detecting this
Between the mould square of CPICH correlation put when being greater than preset second threshold, determine CPICH Common Pilot Channel for single strong diameter channel, it is no
It is then multipath channel.In embodiments of the present invention, the mould square of CPICH correlation is related power.
Certainly, it should be appreciated by those skilled in the art that can also simultaneously according to multiple more early than destination sample time point or
The CPICH correlation of the sampling time point of late integral multiple unit chip duration, to carry out the detection of single strong diameter channel.For example,
Detect that the mould square of the CPICH correlation of sampling time point 1chip more early than destination sample time point is less than preset first
Threshold value, and the mould square of the CPICH correlation of the sampling time point of (wherein y > 1) chip y more early than destination sample time point is greater than
When preset second threshold, determine that CPICH Common Pilot Channel is otherwise multipath channel for single strong diameter channel.
Technical solution provided in this embodiment is getting the maximum in CPICH sequence of correlation values and sequence of correlation values
It, can be according to integer early or late than destination sample time point in sequence of correlation values after correlation corresponding destination sample time point
Letter can be improved to carry out the identification of single strong diameter channel scenario in the CPICH correlation of the sampling time point of times unit chip duration
The accuracy of path detection promotes the equalization performance of single strong diameter channel.
Embodiment two
Fig. 2 is a kind of flow diagram of the strong diameter channel detection method of list provided by Embodiment 2 of the present invention.The present embodiment
On the basis of the above embodiment 1, the step S120 in embodiment one is advanced optimized.Referring to fig. 2, single strong diameter letter
Road detection method specifically comprises the following steps:
Step S210, the CPICH correlation sequence sampled within the set duration according to the setting sampling period is obtained
Maximum related value corresponding destination sample time point in column and the sequence of correlation values；
Step S220, in the sequence of correlation values that will acquire, integral multiple unit chip early or late than destination sample time point
Meter is normalized to the mould square of the detection parameters as detection parameters in the CPICH correlation of the sampling time point of duration
It calculates；
Step S230, judge to normalize whether calculated result is less than setting threshold value, if it is, determining that CPICH is
Single strong diameter channel.
Different types of transmitting terminal can send the pilot signal of different capacity, and receiving end is believed for the pilot tone of different capacity
Number, the variation range of obtained CPICH sequence of correlation values also can there is some difference.To eliminate this species diversity, the present embodiment
The scheme of offer first carries out normalizing to the mould square of the detection parameters before carrying out single strong diameter Channel Detection using detection parameters
Change.
Illustratively, a sampling time point can be selected (except detection parameters are corresponding in the CPICH sequence of correlation values of acquisition
Sampling time point except) mould square of corresponding CPICH correlation puts down the mould of obtained detection parameters as reference value
Side makes comparisons with the reference value, to complete to normalize.Preferably, calculating is normalized to the mould square of detection parameters, comprising:
The ratio for calculating the mould square and the mould square of the maximum related value obtained of detection parameters, using the ratio as to detection parameters
Calculated result is normalized in mould square.Due to having got maximum related value after being finished abovementioned steps S210, institute
Directly the mould square of detection parameters can be normalized using the maximum related value, to accelerate to detect speed.
Certainly, also it can realize and the mould square of detection parameters is normalized by other means.For example, solving acquisition
The average value or summation of the mould square of all CPICH correlations in CPICH sequence of correlation values, as reference value, by what is obtained
The result of calculating is normalized as the mould square to detection parameters for the ratio of the mould square of detection parameters and the reference value.
Referring to Figure 1B, in multipath channel, for 1chip sampling time point 1chip more early than 0chip sampling time point
For position, diameter influences the correlated results of the position compared with other positions maximum.
Preferably, the sampling period is 1/N times (namely sample rate be unit chip duration N times) of unit chip duration,
Wherein N is the integer greater than 1；
In the sequence of correlation values that will acquire, early or late than destination sample time point when the sampling of integral multiple unit chip duration
Between the CPICH correlation put, as detection parameters, are as follows: in the sequence of correlation values that will acquire, unit more late than destination sample time point
The CPICH correlation of the sampling time point of chip duration, as detection parameters.The corresponding sampling time point of detection parameters, it is corresponding
1chip sampling time point in above-mentioned Figure 1A or Figure 1B.
Based on the above technical solution, if sequence of correlation values previously according to acquisition, it can be recognized accurately and lead
Frequency channel is multipath channel, then the strong diameter detection operation of list provided in an embodiment of the present invention need not can be executed again, as far as possible not
Under the premise of influencing channel path Detection accuracy, accelerates detection speed, save testing cost, avoid the wasting of resources.Preferably,
Before carrying out single strong diameter Channel Detection, further includes:
Extract each CPICH correlation for being greater than setting multi-path judging thresholding in the sequence of correlation values obtained；
Judge whether the sampling time interval between each CPICH correlation extracted and the maximum related value of acquisition is big
In setting time interval；
The operation of the single strong diameter Channel Detection of execution is controlled whether according to judging result.
For example, if in all CPICH correlations extracted, when sampling between the maximum related value of acquisition
Between to be greater than the CPICH correlation number ratio at setting time interval be more than that setting ratio threshold value (such as is extracted each at interval
Sampling time interval of the CPICH correlation between the maximum related value of acquisition is greater than setting time interval, and number ratio arrives
It is excessive up to the diameter spacing 100%) namely between other diameters and maximum diameter, it is determined that pilot channel is multipath channel, Er Feidan
Strong diameter channel no longer executes the operation of single strong diameter Channel Detection, terminates process；Otherwise, single strong diameter Channel Detection is continued to execute
Operation.
In embodiments of the present invention, after carrying out single strong diameter Channel Detection, further includes: if detecting that public guide frequency is believed
Road is single strong diameter channel, then is single strong diameter channel estimation results by original Estimation of multipath channel modified result, according to Dan Qiang
Diameter channel model carries out channel equalization.In the prior art, it will usually which design has the original detection scheme to channel path, still
The program is identified not for single strong diameter scene, is often determined that pilot channel is multipath channel under the scene, is generated
Estimation of multipath channel is not as a result, accuracy in detection is good enough, to influence subsequent channel portfolio effect.The present embodiment can be in original detection
On the basis of scheme, increase the scheme of single strong diameter Channel Detection, to be supplemented original detection scheme, improves channel path inspection
The accuracy rate of survey.
Embodiment three
Fig. 3 is a kind of structural schematic diagram for the strong diameter Channel Detection device of list that the embodiment of the present invention three provides.Referring to Fig. 3,
The structure of the device specifically includes:
Acquiring unit 310, for obtaining within the set duration according to public leading of being sampled of setting sampling period
Maximum related value corresponding destination sample time point in frequency channel CPICH sequence of correlation values and the sequence of correlation values,
Described in sampling period and unit chip duration have integer multiple relationship；
Single strong diameter channel detection unit 320, for by the sequence of correlation values, it is more early than the destination sample time point or
The CPICH correlation of the sampling time point of late integral multiple unit chip duration, as detection parameters, according to the detection parameters into
The single strong diameter Channel Detection of row.
Illustratively, the strong diameter channel detection unit 320 of the list, comprising:
Computation subunit 3201 is normalized, is returned for calculating the mould square of the detection parameters, and by the mould square
One changes calculating；
Thresholding determines subelement 3202, normalizes whether calculated result is less than setting threshold value for judging, if so,
Then determine the CPICH Common Pilot Channel for single strong diameter channel.
Illustratively, the normalization computation subunit 3201, is specifically used for:
The ratio for calculating the mould square and the mould square of the maximum related value of the detection parameters, using the ratio as pair
Calculated result is normalized in the mould square of the detection parameters.
Illustratively, the sampling period is 1/N times of unit chip duration, and wherein N is the integer greater than 1；
The strong diameter channel detection unit 320 of list, is specifically used for:
By in the sequence of correlation values, the sampling time point of unit chip duration more late than the destination sample time point
CPICH correlation, as detection parameters.
Based on the above technical solution, the strong diameter Channel Detection device of list provided in this embodiment further includes single strong diameter letter
Road detection control unit 330, is used for:
Extract each CPICH correlation for being greater than setting multi-path judging thresholding in the sequence of correlation values；
Whether the sampling time interval between the judgement each CPICH correlation extracted and the maximum related value is greater than
Setting time interval；
The behaviour whether strong diameter channel detection unit 320 of the list executes single strong diameter Channel Detection is controlled according to judging result
Make.
Based on the above technical solution, the strong diameter Channel Detection device of list provided in this embodiment further includes amending unit
340, it is used for:
If the strong diameter channel detection unit 320 of list detects that the CPICH Common Pilot Channel, will for single strong diameter channel
Original Estimation of multipath channel modified result is single strong diameter channel estimation results, equal to carry out channel according to single strong diameter channel model
Weighing apparatus.
Method provided by any embodiment of the invention can be performed in the said goods, has the corresponding functional module of execution method
And beneficial effect.
Example IV
The present embodiment provides a preferred embodiment based on above-mentioned all embodiments.Fig. 4 A is the embodiment of the present invention four
A kind of channel path testing principle operation schematic diagram provided, specifically includes:
CPICH correlation value calculation module 410 in real time receives the CPICH sampled according to the setting sampling period
Data carry out descrambling and de-spreading, are then based on duration window W and calculate CPICH correlation；
Location management (PosM, Position Management) module 420, according to the meter of CPICH correlation value calculation module
It calculates as a result, timing carries out the detection of channel path, to judge whether CPICH is multipath channel；
The mould square of low-pass filtering (LPF, Low Pass Filter) module 430, first calculating CPICH correlation is (related
Performance number), multiframe incoherent averaging then is carried out to the correlation power value of CPICH, to carry out low-pass filtering；
Single strong diameter channel detection module 440 determines whether CPICH is single according to the calculated result of low-pass filtering module 430
Strong diameter channel, and definitive result Flag is exported.Flag=1 indicates this single strong diameter channel detection result are as follows: CPICH
For single strong diameter channel；Flag=0 indicates this single strong diameter channel detection result are as follows: CPICH is not single strong diameter channel.
Illustratively, single strong diameter channel detection module 440 is specifically used for:
Firstly, obtaining 430 calculated result of low-pass filtering module since frame start position, obtain each in setting duration
CPICH performance number forms related power value sequence { ηm, m=0,1 ..., 2W-1 is (using the sampling period as unit chip duration
For 1/2 times)；
Then, from related power value sequence, η is foundtarget=max { ηm, m=0,1 ..., 2W-1, target are indicated
max{ηmSerial number in related power value sequence；
If judging that the diameter spacing of other diameters and maximum diameter is greater than Γ according to multi-path judging thresholdingz, it is considered that CPICH
It is not single strong diameter scene, exports this single strong diameter channel detection result Flag=0；Otherwise:
Then, ratio calculated(if the sampling period is 1/N times of unit chip duration,), wherein γ is considered as the correlation power value after normalization.
Finally, by above-mentioned ratio and setting threshold value γThresCompare, determines this single strong diameter channel detection result
It is a kind of respectively under single strong diameter scene and multipath scenario that Fig. 4 B is that the embodiment of the present invention four provides, repeatedly right
CPICH carries out the normalization correlation power value simulation result schematic diagram that single strong diameter Channel Detection obtains.B referring to fig. 4, abscissa table
Show the time point of each single strong diameter Channel Detection, ordinate is the normalization correlation power value obtained in each detection time point.
AWGN (Additive White Gaussian Noise, additive white Gaussian noise) channel corresponds to single strong diameter channel, AWGN
Q in (or PA)-q dB indicates signal-to-noise ratio.As known in the figure: the corresponding normalization correlation power value of single diameter channel by force is divided equally
Cloth 0.02 hereinafter, and most of corresponding normalization correlation power value of multipath channel is distributed in 0.02 or more, as long as setting
Determine threshold value and be slightly less than 0.02, can accurately distinguish multipath channel and single strong diameter channel；Also, the inspection to single strong diameter channel
It surveys, little with Between Signal To Noise Ratio, testing result is not influenced by signal-to-noise ratio.
Relative size of the present embodiment according to the correlation of CPICH in the position 1chip carries out the detection of single strong diameter scene,
After being detected as single strong diameter scene, that is, single diameter equilibrium is carried out, preferable performance can be obtained, especially in high order modulation, high code rate
Scene.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (10)
1. a kind of strong diameter channel detection method of list characterized by comprising
Obtain the CPICH Common Pilot Channel CPICH correlation sequence sampled within the set duration according to the setting sampling period
Maximum related value corresponding destination sample time point in column and the sequence of correlation values, wherein the sampling period and list
Position chip duration has integer multiple relationship；
By in the sequence of correlation values, sampling time of integral multiple unit chip duration early or late than the destination sample time point
The CPICH correlation of point, as detection parameters；
The mould square of the detection parameters is calculated, and calculating is normalized in the mould square；
Judge to normalize whether calculated result is less than setting threshold value, if it is, determining that the CPICH Common Pilot Channel is single
Strong diameter channel；The strong diameter channel of list is single diameter channel, and is strong diameter channel.
2. the method according to claim 1, wherein calculating is normalized to the detection parameters, comprising:
The ratio for calculating the mould square and the mould square of the maximum related value of the detection parameters, using the ratio as to described
Calculated result is normalized in the mould square of detection parameters.
3. the method according to claim 1, wherein the sampling period is 1/N times of unit chip duration,
Middle N is the integer greater than 1；
By in the sequence of correlation values, sampling time of integral multiple unit chip duration early or late than the destination sample time point
The CPICH correlation of point, as detection parameters, comprising:
By in the sequence of correlation values, the CPICH of the sampling time point of unit chip duration more late than the destination sample time point
Correlation, as detection parameters.
4. method according to any one of claim 1-3, which is characterized in that before carrying out single strong diameter Channel Detection,
Further include:
Extract each CPICH correlation for being greater than setting multi-path judging thresholding in the sequence of correlation values；
Whether the sampling time interval between the judgement each CPICH correlation extracted and the maximum related value is greater than setting
Time interval；
The operation of the single strong diameter Channel Detection of execution is controlled whether according to judging result.
5. method according to any one of claim 1-3, which is characterized in that after carrying out single strong diameter Channel Detection,
Further include:
If detecting that original Estimation of multipath channel modified result is single for single strong diameter channel by the CPICH Common Pilot Channel
Strong diameter channel estimation results, to carry out channel equalization according to single strong diameter channel model.
6. a kind of strong diameter Channel Detection device of list characterized by comprising
Acquiring unit, for obtaining the CPICH Common Pilot Channel sampled within the set duration according to the setting sampling period
Maximum related value corresponding destination sample time point in CPICH sequence of correlation values and the sequence of correlation values, wherein described
Sampling period and unit chip duration have integer multiple relationship；
Single strong diameter channel detection unit, for by the sequence of correlation values, integer early or late than the destination sample time point
The CPICH correlation of the sampling time point of times unit chip duration, as detection parameters, according to detection parameters judgement
Whether CPICH Common Pilot Channel is single strong diameter channel；
The strong diameter channel detection unit of list, comprising: normalization computation subunit and thresholding determine subelement；
The normalization computation subunit is normalized for calculating the mould square of the detection parameters, and by the mould square
It calculates；
The thresholding determines subelement, normalizes whether calculated result is less than setting threshold value for judging, if it is, really
The fixed CPICH Common Pilot Channel is single strong diameter channel；The strong diameter channel of list is single diameter channel, and is strong diameter channel.
7. device according to claim 6, which is characterized in that the normalization computation subunit is specifically used for:
The ratio for calculating the mould square and the mould square of the maximum related value of the detection parameters, using the ratio as to described
Calculated result is normalized in the mould square of detection parameters.
8. device according to claim 6, which is characterized in that the sampling period is 1/N times of unit chip duration,
Middle N is the integer greater than 1；
The strong diameter channel detection unit of list, is specifically used for:
By in the sequence of correlation values, the CPICH of the sampling time point of unit chip duration more late than the destination sample time point
Correlation, as detection parameters.
9. device a method according to any one of claims 6-8, which is characterized in that further include that single strong diameter Channel Detection control is single
Member is used for:
Extract each CPICH correlation for being greater than setting multi-path judging thresholding in the sequence of correlation values；
Whether the sampling time interval between the judgement each CPICH correlation extracted and the maximum related value is greater than setting
Time interval；
The operation whether strong diameter channel detection unit of the list executes single strong diameter Channel Detection is controlled according to judging result.
10. device a method according to any one of claims 6-8, which is characterized in that further include amending unit, be used for:
If the strong diameter channel detection unit of list detects that the CPICH Common Pilot Channel, will be original more for single strong diameter channel
Diameter channel estimation results are modified to single strong diameter channel estimation results, to carry out channel equalization according to single strong diameter channel model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237365.0A CN106302267B (en) | 2015-05-11 | 2015-05-11 | A kind of strong diameter channel detection method of list and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510237365.0A CN106302267B (en) | 2015-05-11 | 2015-05-11 | A kind of strong diameter channel detection method of list and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106302267A CN106302267A (en) | 2017-01-04 |
| CN106302267B true CN106302267B (en) | 2019-05-28 |
Family
ID=57631507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510237365.0A Active CN106302267B (en) | 2015-05-11 | 2015-05-11 | A kind of strong diameter channel detection method of list and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106302267B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006095046A1 (en) * | 2005-03-10 | 2006-09-14 | Nokia Corporation | Method for impulse response measurement in a cdma receiver using antenna diversity |
| CN1937430A (en) * | 2005-09-23 | 2007-03-28 | 中兴通讯股份有限公司 | Muti-path detecting method for CDMA communication system |
| CN101043229A (en) * | 2007-03-15 | 2007-09-26 | 中兴通讯股份有限公司 | Apparatus and method of super-strength path selective treatment in WCDMA system |
| EP1134908B1 (en) * | 2000-02-28 | 2008-03-26 | Texas Instruments Incorporated | Spread spectrum path estimation |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7480356B2 (en) * | 2004-12-08 | 2009-01-20 | Telefonaktiebolaget L M Ericsson (Publ) | Method of and system for path selection in rich multipath conditions |
-
2015
- 2015-05-11 CN CN201510237365.0A patent/CN106302267B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1134908B1 (en) * | 2000-02-28 | 2008-03-26 | Texas Instruments Incorporated | Spread spectrum path estimation |
| WO2006095046A1 (en) * | 2005-03-10 | 2006-09-14 | Nokia Corporation | Method for impulse response measurement in a cdma receiver using antenna diversity |
| CN1937430A (en) * | 2005-09-23 | 2007-03-28 | 中兴通讯股份有限公司 | Muti-path detecting method for CDMA communication system |
| CN101043229A (en) * | 2007-03-15 | 2007-09-26 | 中兴通讯股份有限公司 | Apparatus and method of super-strength path selective treatment in WCDMA system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106302267A (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7391828B2 (en) | Symbol boundary detection device and method for use in OFDM system | |
| KR102248486B1 (en) | Apparatus and method for frequency offset estimation of received signal | |
| CN104811972A (en) | Random access channel false alarm control | |
| US9516616B2 (en) | Method and apparatus for estimating frequency errors | |
| US20150215149A1 (en) | Receiver device, transmit/receive terminal, propagation delay time measurement method and computer program | |
| CN110099022A (en) | Multipath Time Delay Estimation method and apparatus | |
| KR20040024986A (en) | Symbol timing detection apparatus of ofdm system | |
| EP3163825B1 (en) | Method and apparatus for detecting multipath frame header | |
| CN103873421B (en) | Symbol synchronizing method of multi-path channel | |
| CN101867389B (en) | Down link secondary synchronous channel (S-SCH) detection method of 3GPP-LTE (3rd Generation Partner Project-Long Term Evolution) system | |
| CN106302267B (en) | A kind of strong diameter channel detection method of list and device | |
| KR101704812B1 (en) | Apparatus and method to estimate noise and interference power in a communication system | |
| US9942061B2 (en) | Multipath selection method and device, and storage medium | |
| TWI485994B (en) | A cellular communications system | |
| JP2000224076A (en) | Receiver | |
| CN108738124B (en) | Timing synchronization method and device | |
| KR101257015B1 (en) | Methods of estimating timing offset using multi stage for timing synchronization and ofdm reciever | |
| WO2012052771A1 (en) | Multicarrier packet synchronisation | |
| CN111726180B (en) | Preamble signal detection method and device | |
| CN108848526B (en) | PUSCH-based field intensity measurement equipment and method in TD-LTE | |
| CN107294654A (en) | A kind of preamble detecting method and LTE comprehensive test instruments based on LTE comprehensive test instruments | |
| EP2991298A1 (en) | Channel equalization method and device, and receiver | |
| KR101025245B1 (en) | Baseband process method based on doubling sampling | |
| TWI583229B (en) | Time-varying channel discriminating device and method thereof | |
| US20190393910A1 (en) | Timing estimation device and timing estimation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20180817 Address after: 200120 the fourth floor A406 room 3, 1258 Mingyue Road, Shanghai free trade zone. Applicant after: Chen core technology Co.,Ltd. Applicant after: DATANG SEMICONDUCTOR DESIGN Co.,Ltd. Address before: 200233 4 building, No. 333, No. 41, Qinjiang Road, Shanghai, Xuhui District Applicant before: LEADCORE TECHNOLOGY Co.,Ltd. Applicant before: DATANG SEMICONDUCTOR DESIGN Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221123 Address after: 201206 Shanghai Pudong New Area free trade pilot area 1258 moon 3 building fourth floor A406 room Patentee after: Chen core technology Co.,Ltd. Patentee after: Chenxin Technology Co.,Ltd. Address before: 200120 the fourth floor A406 room 3, 1258 Mingyue Road, Shanghai free trade zone. Patentee before: Chen core technology Co.,Ltd. Patentee before: DATANG SEMICONDUCTOR DESIGN Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201206 Shanghai Pudong New Area free trade pilot area 1258 moon 3 building fourth floor A406 room Patentee after: Chen core technology Co.,Ltd. Patentee after: Chenxin Technology Co.,Ltd. Address before: 201206 Shanghai Pudong New Area free trade pilot area 1258 moon 3 building fourth floor A406 room Patentee before: Chen core technology Co.,Ltd. Patentee before: Chenxin Technology Co.,Ltd. |