CN110535594A - Pilot frequency sequence configuration method, device and electronic equipment, storage medium - Google Patents
Pilot frequency sequence configuration method, device and electronic equipment, storage medium Download PDFInfo
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- CN110535594A CN110535594A CN201811230279.7A CN201811230279A CN110535594A CN 110535594 A CN110535594 A CN 110535594A CN 201811230279 A CN201811230279 A CN 201811230279A CN 110535594 A CN110535594 A CN 110535594A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2647—Arrangements specific to the receiver only
- H04L27/2655—Synchronisation arrangements
- H04L27/2689—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation
- H04L27/2695—Link with other circuits, i.e. special connections between synchronisation arrangements and other circuits for achieving synchronisation with channel estimation, e.g. determination of delay spread, derivative or peak tracking
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/0008—Wavelet-division
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/006—Quality of the received signal, e.g. BER, SNR, water filling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0058—Allocation criteria
- H04L5/0062—Avoidance of ingress interference, e.g. ham radio channels
Abstract
The present embodiments relate to wireless communication technology fields, disclose a kind of pilot frequency sequence configuration method, device and electronic equipment, storage medium, this method is used to configure pilot frequency sequence for data frame to be sent, wherein, data frame to be sent includes a series of subframes, each subframe includes at least two orthogonal frequency division multiplex OFDM frequency pilot signs, each frequency pilot sign has several subcarriers, which includes: to choose different orthogonal pilot frequency sequences at least two OFDM frequency pilot signs in each subframe；The orthogonal pilot frequency sequence correspondence of selection is made an addition in the subcarrier of at least two OFDM frequency pilot signs.The embodiment of the present invention is by choosing different pilot frequency sequences for different OFDM frequency pilot signs, accordingly even when there is a frequency pilot sign that pilot tone collision occurs, channel information can also be obtained by other frequency pilot signs, so as to more accurately update channel information.
Description
Technical field
The present embodiments relate to wireless communication technology field, in particular to a kind of pilot frequency sequence configuration method, device and
Electronic equipment, storage medium.
Background technique
ZC (Zadoff-Chu) sequence has the following characteristics that 1. permanent envelope traits: the ZC sequence constant amplitude of random length；
2. ideal period autocorrelation performance: after any ZC sequential shift n, when n is not the integral multiple in the period of ZC sequence, after displacement
Sequence it is uncorrelated to former sequence；3. good cross correlation: cross-correlation and partial correlation values are close to 0；4. low peak average ratio
Characteristic: the signal of any ZC sequence composition, peak value are very low with the ratio of its mean value；5. being still ZC sequence after Fourier transformation
Column: any ZC sequence is still ZC sequence after the positive inverse transformation of Fourier.These features based on ZC sequence, ZC sequence exist
It is widely used in LTE (Long Term Evolution, long term evolution).Training sequence of the ZC sequence as synchronization,
The leader sequence of PRACH (Physical Random Access Channe, Physical Random Access Channel), uplink and downlink DMRS
(Demodulation reference signal, demodulated reference signal) sequence does channel estimation, and ZC sequence is as uplink SRS
(Sounding reference signal, Sounding Reference Signal) sequence detection channel quality.
When doing channel estimation as pilot frequency sequence using ZC sequence, if different users uses identical pilot tone sequence
Column, occupy identical time-frequency domain resources, then pilot tone collision can occur, and the accuracy of channel estimation will be greatly reduced.
At least there are the following problems in the prior art for inventor's discovery: in order to reduce pilot tone collision probability, existing LTE mark
Generally using OCC (Orthogonal Cover Code, orthogonal covering codes), mode configures pilot frequency sequence in standard, although OCC passes through
Pilot tone collision probability can be reduced by increasing orthogonal pilot frequency sequence quantity, but since it is in each subframe in data frame
Different OFDM (Orthogonal Frequency Division Multiplexing, orthogonal frequency division multiplexing) frequency pilot signs are matched
The pilot frequency sequence set basic equivalence in terms of channel estimation, therefore, when pilot tone collision occurs for a frequency pilot sign wherein, quite
Pilot tone collision occurs in the subframe, therefore pilot tone collision probability is very high.
Summary of the invention
Embodiment of the present invention is designed to provide a kind of pilot frequency sequence configuration method, device and electronic equipment, storage
Medium, by choosing different pilot frequency sequences for different OFDM frequency pilot signs, accordingly even when there is a frequency pilot sign to lead
Frequency collides, and channel information can also be obtained by other frequency pilot signs, so as to more accurately update channel information.
In order to solve the above technical problems, embodiments of the present invention provide a kind of pilot frequency sequence configuration method, for for
Data frame to be sent configures pilot frequency sequence, wherein the data frame to be sent includes a series of subframes, and each subframe includes
At least two orthogonal frequency division multiplex OFDM frequency pilot signs, each frequency pilot sign have several subcarriers, and the pilot frequency sequence is matched
The method of setting includes: to choose different orthogonal pilot frequency sequences at least two OFDM frequency pilot signs in each subframe；By selection
The orthogonal pilot frequency sequence correspondence makes an addition in the subcarrier of at least two OFDM frequency pilot sign.
Embodiments of the present invention additionally provide a kind of pilot frequency sequence configuration device, for configuring for data frame to be sent
A series of pilot frequency sequence, wherein the data frame to be sent includes subframes, and each subframe includes at least two orthogonal frequency division multiplexings
With OFDM frequency pilot sign, each frequency pilot sign has several subcarriers, and the pilot frequency sequence configuration device includes: selection mould
Block, for choosing different orthogonal pilot frequency sequences at least two OFDM frequency pilot signs in each subframe；And adding module,
For the orthogonal pilot frequency sequence chosen correspondence to be made an addition in the subcarrier of at least two OFDM frequency pilot sign.
Embodiments of the present invention additionally provide a kind of electronic equipment characterized by comprising at least one processor；
And the memory being connect at least one described processor communication；Wherein, be stored with can be by described at least one for the memory
The instruction that a processor executes, described instruction is executed by least one described processor, so that at least one described processor energy
Enough execute foregoing pilot frequency sequence configuration method.
Embodiments of the present invention additionally provide a kind of storage medium, are stored with computer program, which is characterized in that described
The pilot frequency sequence configuration method as described in any one of claims 1 to 7 is realized when computer program is executed by processor.
In terms of existing technologies, transmitting terminal is configuring pilot frequency sequence for data frame to be sent to embodiment of the present invention
When, each OFDM frequency pilot sign in respectively each subframe chooses different orthogonal pilot frequency sequences, and the orthogonal of selection is led
Frequency sequence makes an addition in the subcarrier of corresponding OFDM frequency pilot sign.In this way, receiving end is when carrying out channel estimation, as long as one
Frequency pilot sign does not collide, channel estimation can be carried out according to the frequency pilot sign that this does not collide, stated differently, since often
The pilot frequency sequence on each frequency pilot sign in a subframe can be exploited separately for channel estimation, therefore relative to existing OCC
For anti-pilot tone collision method, pilot tone collision probability can be further decreased, so that being conducive to receiving end more accurately updates letter
Road information.
As one embodiment, at least two OFDM frequency pilot signs in each subframe choose different orthogonal lead
Frequency sequence specifically includes: default orthogonal pilot frequency sequence set；It wherein, include N in the orthogonal pilot frequency sequence settA difference
Orthogonal pilot frequency sequence；From the orthogonal pilot frequency sequence set be each subframe at least two OFDM frequency pilot sign with
Machine chooses corresponding orthogonal pilot frequency sequence.
As one embodiment, described is described at least two of each subframe from the orthogonal pilot frequency sequence set
OFDM frequency pilot sign randomly selects corresponding orthogonal pilot frequency sequence, specifically includes: random to generate one group from 1 to NtRandom number make
For the sequence index of the corresponding orthogonal pilot frequency sequence of at least two OFDM frequency pilot sign；It is respectively according to the sequence index
At least two OFDM frequency pilot sign chooses corresponding orthogonal pilot frequency sequence from the orthogonal pilot frequency sequence set.
As one embodiment, the length of the orthogonal pilot frequency sequence is that the sub-carrier number purpose two of the frequency pilot sign is divided
One of.
It is described that the orthogonal pilot frequency sequence correspondence of selection is made an addition at least two OFDM as one embodiment
It in the subcarrier of frequency pilot sign, specifically includes: generating parity flag position；The orthogonal pilot frequency sequence of selection is made an addition to respectively
On the sub-carrier positions of frequency pilot sign subcarrier corresponding with the parity flag position.
As one embodiment, the generation parity flag position specifically: generate the parity flag position at random.
As one embodiment, the orthogonal pilot frequency sequence is ZC sequence.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the flow chart of the pilot frequency sequence configuration method of first embodiment according to the present invention；
Fig. 2 is the flow chart of the pilot frequency sequence configuration method of second embodiment according to the present invention；
Fig. 3 is the flow chart of the pilot frequency sequence configuration method of third embodiment according to the present invention；
Fig. 4 is the orthogonal pilot frequency sequence placement schematic diagram of the invention by taking 4 users as an example；
Fig. 5 is BLER the and BER performance comparison figure of the channel estimation under different pilot frequency sequence configuration methods；
Fig. 6 is the structural schematic diagram of the pilot frequency sequence configuration device of the 4th embodiment according to the present invention；
Fig. 7 is the structural schematic diagram of the electronic equipment of the 5th embodiment according to the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with attached drawing to the present invention
Each embodiment be explained in detail.However, it will be understood by those skilled in the art that in each embodiment party of the present invention
In formula, in order to make the reader understand this application better, many technical details are proposed.But even if without these technical details
And various changes and modifications based on the following respective embodiments, the application technical solution claimed also may be implemented.
The first embodiment of the present invention is related to a kind of pilot frequency sequence configuration method, it is applied to that there is high-speed radiocommunication
On the electronic equipment of energy, electronic equipment includes but is not limited to smart phone, vehicle carried video.The pilot frequency sequence of present embodiment configures
Method is used to configure pilot frequency sequence for data frame to be sent, wherein data frame to be sent includes a series of subframes, every height
Frame includes that at least two orthogonal guide frequencies are multiplexed OFDM frequency pilot sign, and each frequency pilot sign has several subcarriers.Specifically,
This method is applied to MIMO (Multiple-Input Multiple-Output, multiple-input and multiple-output)-ofdm system, setting system
The modulation system of data frame is QPSK (Quadrature Phase Shift Keyin, quadrature phase shift keying), modulation order in system
Number is M, and a subframe of each data frame has 14 OFDM symbols, and orthogonal pilot frequency sequence is placed on the 4th He in a subframe
On 11st symbol, i.e. a subframe is 72 there are two frequency pilot sign, the subcarrier number of an OFDM frequency pilot sign.This right reality
It applies mode and these is not particularly limited, any applicable modulation system, order of modulation and data frame structure belong to this
The protection scope of invention.
Referring to Fig. 1, the pilot frequency sequence configuration method of present embodiment includes:
Step 101: choosing different orthogonal pilot frequency sequences at least two OFDM frequency pilot signs in each subframe.
Step 102: the orthogonal pilot frequency sequence correspondence of selection is made an addition in the subcarrier of at least two OFDM frequency pilot signs.
In step 101, it can be set respectively by way of configuring at least two OFDM frequency pilot signs in each subframe
Different orthogonal pilot frequency sequences is set, such as dynamically can be each subframe according to the ID number of cell and identifier of transmitting terminal etc.
In each OFDM frequency pilot sign different pilot frequency sequences is set.Wherein, different pilot frequency sequences refers to that each pilot frequency sequence is equal
It can be exploited separately for channel estimation.
In present embodiment, orthogonal pilot frequency sequence can use ZC sequence, right without being limited thereto, any applicable orthogonal guide frequency
Sequence is within the scope of the invention.
In step 102, it can be corresponded to according to the length of the orthogonal pilot frequency sequence of selection and make an addition to OFDM frequency pilot sign
Corresponding subcarrier on.
Compared with prior art, transmitting terminal is when configuring pilot frequency sequence for data frame to be sent, respectively for present embodiment
Different orthogonal pilot frequency sequences is chosen for each OFDM frequency pilot sign in each subframe, and the orthogonal pilot frequency sequence of selection is added
It is added in the subcarrier of corresponding OFDM frequency pilot sign.In this way, receiving end is when carrying out channel estimation, as long as a frequency pilot sign
It does not collide, channel estimation can be carried out according to the frequency pilot sign that this does not collide, stated differently, since in each subframe
Each frequency pilot sign on pilot frequency sequence can be exploited separately for channel estimation, therefore touched relative to the anti-pilot tone of existing OCC
For hitting method, pilot tone collision probability can be further decreased, so that being conducive to receiving end more accurately updates channel information.
Second embodiment of the present invention is related to a kind of pilot frequency sequence configuration method.Second embodiment and the first embodiment party
Formula is roughly the same, is in place of the main distinction: first embodiment is different in each subframe by way of configuring
OFDM frequency pilot sign configures different orthogonal pilot frequency sequences.And in second embodiment of the invention, by presetting orthogonal guide frequency
Arrangement set, and from the mode chosen at random in orthogonal pilot frequency sequence set be each subframe in different OFDM pilot tones
Sequence configures different orthogonal pilot frequency sequences.
Referring to Fig. 2, the pilot frequency sequence configuration method of present embodiment includes:
Step 201: random to generate one group from 1 to NtRandom number it is corresponding orthogonal as at least two OFDM frequency pilot signs
The sequence index of pilot frequency sequence.
Step 202: being respectively that at least two OFDM frequency pilot signs are selected from orthogonal pilot frequency sequence set according to sequence index
Take corresponding orthogonal pilot frequency sequence.
Step 203: the orthogonal pilot frequency sequence correspondence of selection is made an addition in the subcarrier of at least two OFDM frequency pilot signs.
It, can be by selecting a kind of orthogonal pilot frequency sequence generating algorithm in present embodiment, generating one group of number is Nt's
Orthogonal pilot frequency sequence, to obtain preset orthogonal pilot frequency sequence set Ф={ p1, p2 ..., pNt, in set Ф it is each just
Pilot frequency sequence is handed over to be all different.The number and length of orthogonal pilot frequency sequence in set Ф can be set according to actual needs,
Details are not described herein again.
Present embodiment is at least two of each subframe from orthogonal pilot frequency sequence set by step 201, step 202
OFDM frequency pilot sign randomly selects corresponding orthogonal pilot frequency sequence.Specifically, random to generate one group from 1 to N in step 201t's
Sequence index of the random number as the corresponding orthogonal pilot frequency sequence of at least two OFDM frequency pilot signs, i.e., the value of each random number
For 1 and NtArbitrary integer between (i.e. the number of orthogonal pilot frequency sequence in orthogonal pilot frequency sequence set Ф).Specifically, work as Nt
When equal to 24, each random number is the arbitrary integer between 1~24, to can determine OFDM frequency pilot sign by random number
Corresponding orthogonal pilot frequency sequence.Wherein, the number of random number can be identical as the number of OFDM frequency pilot sign in each subframe.
For example, when the number of the OFDM frequency pilot sign in each subframe is two, the quantity of random number is also two.Step
It, can be using first random number as the sequence index of first OFDM frequency pilot sign in each subframe, i.e., according to first in 202
The value of a random number is chosen corresponding orthogonal pilot frequency sequence in orthogonal pilot frequency sequence set Ф and is accorded with as first OFDM pilot tone
Number pilot frequency sequence, for example, the value of first random number is 3, then orthogonal by the 3rd in orthogonal pilot frequency sequence set Ф
Pilot frequency sequence of the pilot frequency sequence as first OFDM frequency pilot sign.Similar, using second random number as in subframe
The sequence index of the corresponding orthogonal pilot frequency sequence of two OFDM frequency pilot signs, to be chosen for second OFDM frequency pilot sign orthogonal
Pilot frequency sequence.If there are also more OFDM frequency pilot signs in each subframe, similarly chosen for remaining OFDM frequency pilot sign
Corresponding orthogonal pilot frequency sequence.
It should be noted that in practical applications, it is respectively each to can also adopt different Generating Random Number
Each OFDM frequency pilot sign in subframe randomly selects pilot frequency sequence, generates one for example, by using the first Generating Random Number
Index of the random number as the pilot frequency sequence of first OFDM frequency pilot sign, then one is generated using second of Generating Random Number
Index of a random number as the pilot frequency sequence of second OFDM frequency pilot sign can also similarly be respectively adopted different random
Number generation method generates index of more random numbers as the pilot frequency sequence of more OFDM frequency pilot signs, wherein posterior lead
Need to exclude the random number that first Generating Random Number generated in the corresponding Generating Random Number of frequency symbol.This implementation
Mode for be from orthogonal pilot frequency sequence set at least two OFDM frequency pilot signs of each subframe randomly select it is corresponding just
The mode of pilot frequency sequence is handed over to be not particularly limited.
Present embodiment compared with prior art, obtains each OFDM pilot tone in subframe by way of generating random number
The pilot sequence index of symbol, it is ensured that different pilot frequency sequences is configured for each OFDM frequency pilot sign in each subframe,
Receiving end is allowed to carry out channel according to the pilot frequency sequence that the subcarrier of each OFDM frequency pilot sign in each subframe carries
Estimation is conducive to improve channel estimation accuracy so as to reduce pilot tone collision probability.
Third embodiment of the present invention is related to a kind of pilot frequency sequence configuration method.Third embodiment is first or
Improvement is made on the basis of two embodiments, is mainly theed improvement is that: in the third embodiment, further according to generation
Parity flag position determines pilot frequency sequence in the placement location of the subcarrier of each frequency pilot sign, so as to further increase in subframe
Different OFDM frequency pilot signs configuration pilot frequency sequence otherness.
In present embodiment, the length of each orthogonal pilot frequency sequence in preset orthogonal pilot frequency sequence set Ф is to lead
The sub-carrier number purpose half of frequency symbol.Referring to Fig. 3, the pilot frequency sequence configuration method of present embodiment includes:
Step 301: choosing different orthogonal pilot frequency sequences at least two OFDM frequency pilot signs in each subframe.
Step 302: random to generate parity flag position.
Step 303: the orthogonal pilot frequency sequence of selection is made an addition to the sub-carrier positions and parity flag of frequency pilot sign respectively
On the corresponding subcarrier in position.
The orthogonal pilot frequency sequence correspondence of selection is made an addition at least two by step 302, step 303 by present embodiment
In the subcarrier of OFDM frequency pilot sign.Wherein, parity flag position can be denoted as i, and the value of i can be with for 0 or 1,0 and 1
Indicate odd bits or even bit.Here odd bits and even bit refer to multiple subcarriers of an OFDM frequency pilot sign
Position.In step 302, transmitting terminal generates the parity flag position that parity flag position refers to that the transmitting terminal generates at random and can be changed, i.e., both
The parity flag position for indicating odd number can be generated, the parity flag position for indicating even number also can be generated.It is so without being limited thereto, in reality
In, the parity flag position that a transmitting terminal generates can be identical always, i.e., generates the parity flag position for indicating odd number always
Or the parity flag position for indicating even number is generated always.
In step 303, according to the value of parity flag position, the orthogonal pilot frequency sequence of each OFDM frequency pilot sign maps respectively
On to the subcarrier of subcarrier serial number odd number or it is mapped on the subcarrier of subcarrier serial number even number.If parity flag
Position i=0, pilot frequency sequence can be mapped on corresponding frequency pilot sign on the subcarrier of subcarrier serial number odd number, if odd
Pilot frequency sequence can be mapped on corresponding frequency pilot sign on the subcarrier of subcarrier serial number even number by even flag bit i=1.
Present embodiment is led compared with aforementioned embodiments by generating parity flag position at random, and by the orthogonal of selection
Frequency sequence is made an addition to respectively on the sub-carrier positions subcarrier corresponding with parity flag position of frequency pilot sign, can be further improved
The otherness of the pilot frequency sequence of different frequency pilot signs, to further decrease the probability of pilot tone collision.
Below with reference to Fig. 4 to the reduction pilot tone collision probability of embodiment of pilot frequency sequence configuration method of the present invention a kind of
Effect is illustrated.Please refer to a kind of k user of embodiment using pilot frequency sequence configuration method of the present invention shown in Fig. 4
Orthogonal pilot frequency sequence placement schematic diagram, k is, for example, 4, i.e. user1~4, wherein each subframe has 2 OFDM pilot tones symbol
Number.A kind of embodiment that pilot frequency sequence configuration method of the present invention is respectively adopted in each user's (i.e. transmitting terminal) is number to be sent
Pilot frequency sequence is configured according to frame, then the orthogonal pilot frequency sequence group of each subframe of 4 users is { x1,1,x1,2},{x2,1,x2,2},{x3,1,
x3,2},{x4,1,x4,2}.More specifically, in the orthogonal pilot frequency sequence set Ф of each user={ p1, p2 ..., p24 }, set Ф
The length of each orthogonal pilot frequency sequence is 36, the sub-carrier number purpose half of as one frequency pilot sign.In a subframe,
For first frequency pilot sign, each user generates one group of random number from 1 to 24 at random, and takes the numerical value of first random number
The index of pilot frequency sequence as first frequency pilot sign obtains the sequence index value j={ 1,5,20,16 } of 4 users in this way.
Then each user chooses corresponding pilot frequency sequence x1,1 according to the index value j of oneself from orthogonal pilot frequency sequence set Ф respectively
=p1, x2,1=p5, x3,1=p20, x4,1=p16 as this 4 users first frequency pilot sign pilot frequency sequence.Second
A frequency pilot sign is similar with the pilot frequency sequence of first frequency pilot sign selection mode, specifically, for second frequency pilot sign, often
A user takes the numerical value of second random number as the index of the pilot frequency sequence of second frequency pilot sign, obtains 4 users in this way
Sequence index value j={ 2,5,18,10 }.Then each user is according to the index value j of oneself respectively from orthogonal pilot frequency sequence collection
It closes in Ф and chooses corresponding pilot frequency sequence x1,2=p2, x2,2=p5, x3,2=p18, x4,2=p10, exist as this 4 users
The pilot frequency sequence of second frequency pilot sign.It is { x to obtain the orthogonal pilot frequency sequence group of 4 users1,1,x1,2},{x2,1,
x2,2},{x3,1,x3,2},{x4,1,x4,2}。
Each user generates parity flag position i at random, it is assumed that the parity flag position i=0 of 2 users, then leading selection
Frequency sequence is respectively mapped on the subcarrier of the subcarrier serial number odd number of the 4th and the 11st frequency pilot sign；Other 2 users
Parity flag position i=1, then the pilot frequency sequence of selection is respectively mapped to the subcarrier sequence of the 4th and the 11st frequency pilot sign
Number for even number subcarrier on.To the configuration of the pilot frequency sequence of 4 users of completion.
Above it can be found that due to each with being independently to randomly select placement from orthogonal pilot frequency sequence set Ф per family
Pilot frequency sequence on frequency pilot sign, so the frequency pilot sign configuration of the subframe of any two user in multiple users
The identical probability of pilot frequency sequence is very low, and the pilot frequency sequence probability all the same of two frequency pilot signs configuration in a subframe into
One step reduces.For example, if there are two frequency pilot signs for each subframe tool, and the probability of pilot tone collision occurs for 1 frequency pilot sign
It is 0.1, then the probability that pilot tone collision occurs in a subframe is 0.1 square, if each subframe has 3 frequency pilot signs,
Correspondingly, the probability that pilot tone collision occurs in each subframe will be 0.1 cube, i.e. pilot tone collision occurs in a subframe
Probability be the probability that pilot tone collision occurs for frequency pilot sign Q power, Q is the number of pilot symbols of subframe.And OCC mode by
As long as pilot tone collision occurs for a frequency pilot sign in a subframe, think that pilot tone collision occurs in corresponding subframe, so
Embodiment of the present invention can further decrease pilot tone collision probability.
Please refer to it is shown in fig. 5 be based in the case that 4 users and transmitting terminal movement speed be 50 kilometer per hours (km/h),
It is two OFDM frequency pilot signs configuration in each subframe that third embodiment of the invention pilot frequency sequence configuration method, which is respectively adopted,
Different pilot frequency sequence, in such a way that a frequency pilot sign and two frequency pilot signs are OCC using a pilot frequency sequence into
Block Error Rate (BlockErrorRatio, BLER) and bit error rate (Bit Error Rate, BER) performance pair of row channel estimation
Than figure.Therefrom it can be found that the overall performance of embodiment of the present invention is more excellent.
The step of various methods divide above, be intended merely to describe it is clear, when realization can be merged into a step or
Certain steps are split, multiple steps are decomposed into, as long as including identical logical relation, all in the protection scope of this patent
It is interior；To adding inessential modification in algorithm or in process or introducing inessential design, but its algorithm is not changed
Core design with process is all in the protection scope of the patent.
4th embodiment of the invention is related to a kind of pilot frequency sequence configuration device 600, for for data frame to be sent
Configure pilot frequency sequence, wherein data frame to be sent includes a series of subframes, and each subframe includes at least two orthogonal frequency division multiplexings
With OFDM frequency pilot sign, each frequency pilot sign has several subcarriers.As shown in fig. 6, the pilot frequency sequence of present embodiment is matched
Setting device 600 includes:
Module 601 is chosen, for choosing different orthogonal guide frequencies at least two OFDM frequency pilot signs in each subframe
Sequence；And
Adding module 602, for the orthogonal pilot frequency sequence correspondence of selection to be made an addition at least two OFDM frequency pilot signs
In subcarrier.
In practical applications, orthogonal pilot frequency sequence set can be preset by choosing module 601；Wherein, orthogonal pilot frequency sequence collection
It include N in conjunctiontA different orthogonal pilot frequency sequence, the different orthogonal guide frequency sequences of present embodiment can use ZC sequence；
It is that at least two OFDM frequency pilot signs of each subframe randomly select corresponding orthogonal guide frequency sequence from orthogonal pilot frequency sequence set
Column.It further, is that at least two OFDM frequency pilot signs of each subframe randomly select pair from orthogonal pilot frequency sequence set
The orthogonal pilot frequency sequence answered, specifically includes: random to generate one group from 1 to NtRandom number as at least two OFDM frequency pilot signs
The sequence index of corresponding orthogonal pilot frequency sequence；It is respectively at least two OFDM frequency pilot signs from orthogonal guide frequency according to sequence index
Corresponding orthogonal pilot frequency sequence is chosen in arrangement set.
Further, the length of the available orthogonal pilot frequency sequence in present embodiment can be the subcarrier of frequency pilot sign
The half of number.Adding module 602 specifically includes: generating parity flag position；The orthogonal pilot frequency sequence of selection is added respectively
It is added on the sub-carrier positions subcarrier corresponding with parity flag position of frequency pilot sign.Wherein, parity flag position is generated specifically may be used
Think random generation parity flag position.
Compared with prior art, compared with prior art, transmitting terminal is being to be sent to present embodiment to present embodiment
When data frame configures pilot frequency sequence, each OFDM frequency pilot sign in respectively each subframe chooses different orthogonal guide frequency sequences
Column, and the orthogonal pilot frequency sequence of selection made an addition in the subcarrier of corresponding OFDM frequency pilot sign.In this way, receiving end is carrying out
When channel estimation, as long as a frequency pilot sign does not collide, channel can be carried out according to the frequency pilot sign that this does not collide
Estimate, stated differently, since the pilot frequency sequence on each frequency pilot sign in each subframe can be exploited separately for channel estimation,
Therefore for the anti-pilot tone collision method of existing OCC, pilot tone collision probability can be further decreased, to be conducive to connect
Receiving end more accurately updates channel information.Also, divide by generating parity flag position at random, and by the orthogonal pilot frequency sequence of selection
It does not make an addition on the sub-carrier positions subcarrier corresponding with parity flag position of frequency pilot sign, can be further improved different pilot tones
The otherness of the pilot frequency sequence of symbol, to further decrease the probability of pilot tone collision.
It is not difficult to find that present embodiment is Installation practice corresponding with first, second or third embodiment, this
Embodiment can work in coordination implementation with first, second or third embodiment.First, second or third embodiment in
The relevant technical details mentioned are still effective in the present embodiment, and in order to reduce repetition, which is not described herein again.Correspondingly, originally
The relevant technical details mentioned in embodiment are also applicable in first, second or third embodiment.
It is noted that each module involved in present embodiment is logic module, and in practical applications, one
A logic unit can be a physical unit, be also possible to a part of a physical unit, can also be with multiple physics lists
The combination of member is realized.In addition, in order to protrude innovative part of the invention, it will not be with solution institute of the present invention in present embodiment
The technical issues of proposition, the less close unit of relationship introduced, but this does not indicate that there is no other single in present embodiment
Member.
Fifth embodiment of the invention is related to a kind of electronic equipment, for example, with the intelligent hand of high-speed radiocommunication ability
Machine, vehicle carried video etc..Present embodiment is not particularly limited the type of electronic equipment.As shown in fig. 7, present embodiment
Electronic equipment includes at least one processor 701；And the memory with the communication connection of at least one described processor 701
702；Wherein, the memory 702 be stored with can by least one described processor execute instruction, described instruction by it is described extremely
A few processor 701 executes, so that at least one described processor 701 is able to carry out such as the aforementioned pilot frequency sequence configuration
Method.
Wherein, memory is connected with processor using bus mode, and bus may include the bus of any number of interconnection
And bridge, bus is by one or more processors together with the various circuit connections of memory.Bus can also will be such as peripheral
Together with various other circuit connections of management circuit or the like, these are all well known in the art for equipment, voltage-stablizer
, therefore, it will not be further described herein.Bus interface provides interface between bus and transceiver.Transceiver
Can be an element, be also possible to multiple element, such as multiple receivers and transmitter, provide for over a transmission medium with
The unit of various other device communications.The data handled through processor are transmitted on the radio medium by antenna, further,
Antenna also receives data and transfers data to processor.
Processor is responsible for managing bus and common processing, can also provide various functions, including periodically, peripheral interface,
Voltage adjusting, power management and other control functions.And memory can be used for storage processor and execute operation when institute
The data used.
Sixth embodiment of the invention is related to a kind of computer readable storage medium, is stored with computer program.Computer
Above method embodiment is realized when program is executed by processor.
That is, it will be understood by those skilled in the art that implement the method for the above embodiments be can be with
Relevant hardware is instructed to complete by program, which is stored in a storage medium, including some instructions are to make
It obtains an equipment (can be single-chip microcontroller, chip etc.) or processor (processor) executes side described in each embodiment of the application
The all or part of the steps of method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize specific embodiments of the present invention,
And in practical applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of pilot frequency sequence configuration method, which is characterized in that for configuring pilot frequency sequence for data frame to be sent, wherein
The data frame to be sent includes a series of subframes, and each subframe is accorded with including at least two orthogonal frequency division multiplex OFDM pilot tones
Number, each frequency pilot sign has several subcarriers, and the pilot frequency sequence configuration method includes:
Different orthogonal pilot frequency sequences is chosen at least two OFDM frequency pilot signs in each subframe；
The orthogonal pilot frequency sequence correspondence of selection is made an addition in the subcarrier of at least two OFDM frequency pilot sign.
2. pilot frequency sequence configuration method according to claim 1, which is characterized in that at least two in each subframe
A OFDM frequency pilot sign chooses different orthogonal pilot frequency sequences, specifically includes:
Default orthogonal pilot frequency sequence set；It wherein, include N in the orthogonal pilot frequency sequence settA different orthogonal guide frequency sequence
Column；
It is that at least two OFDM frequency pilot sign of each subframe randomly selects correspondence from the orthogonal pilot frequency sequence set
Orthogonal pilot frequency sequence.
3. pilot frequency sequence configuration method according to claim 2, which is characterized in that described from the orthogonal pilot frequency sequence collection
It is that at least two OFDM frequency pilot sign of each subframe randomly selects corresponding orthogonal pilot frequency sequence in conjunction, specifically includes:
It is random to generate one group from 1 to NtRandom number as the corresponding orthogonal pilot frequency sequence of at least two OFDM frequency pilot sign
Sequence index；
It is respectively that at least two OFDM frequency pilot sign is selected from the orthogonal pilot frequency sequence set according to the sequence index
Take corresponding orthogonal pilot frequency sequence.
4. pilot frequency sequence configuration method according to any one of claim 1 to 3, which is characterized in that the orthogonal guide frequency
The length of sequence is the sub-carrier number purpose half of the frequency pilot sign.
5. pilot frequency sequence configuration method according to claim 4, which is characterized in that the orthogonal guide frequency by selection
Sequence correspondence makes an addition in the subcarrier of at least two OFDM frequency pilot sign, specifically includes:
Generate parity flag position；
By the orthogonal pilot frequency sequence of selection make an addition to respectively the frequency pilot sign sub-carrier positions and the parity flag
On the corresponding subcarrier in position.
6. pilot frequency sequence configuration method according to claim 5, which is characterized in that the generation parity flag position is specific
Are as follows: the parity flag position is generated at random.
7. pilot frequency sequence configuration method according to claim 1, which is characterized in that the orthogonal pilot frequency sequence is ZC sequence
Column.
8. a kind of pilot frequency sequence configuration device, which is characterized in that for configuring pilot frequency sequence for data frame to be sent, wherein
The data frame to be sent includes a series of subframes, and each subframe is accorded with including at least two orthogonal frequency division multiplex OFDM pilot tones
Number, each frequency pilot sign has several subcarriers, and the pilot frequency sequence configuration device includes:
Module is chosen, for choosing different orthogonal pilot frequency sequences at least two OFDM frequency pilot signs in each subframe；With
And
Adding module, for the orthogonal pilot frequency sequence chosen correspondence to be made an addition at least two OFDM frequency pilot sign
In subcarrier.
9. a kind of electronic equipment characterized by comprising
At least one processor；And
The memory being connect at least one described processor communication；Wherein,
The memory is stored with the instruction that can be executed by least one described processor, and described instruction is by described at least one
It manages device to execute, match so that at least one described processor is able to carry out the pilot frequency sequence as described in any one of claims 1 to 7
Set method.
10. a kind of storage medium, is stored with computer program, which is characterized in that when the computer program is executed by processor
Realize the pilot frequency sequence configuration method as described in any one of claims 1 to 7.
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