CN102026219A - Method and corresponding device for generating and transmitting wireless channel measurement reference signal - Google Patents

Abstract

The invention relates to a method for generating a wireless channel measurement reference signal, which is used for a multifrequency wave communication system. In the method, a first subsequence and a second subsequence are selected according to reference signal sequence length NSeq, wherein, NSeq=N1+N2, N1 is the length of the first subsequence, N2 is the length of the second subsequence, R=N1/N2, Nseq, N1, N2 and R are natural numbers, and the length is represented by bit numbers; and signal reference sequence is generated according to the first subsequence and the second subsequence, wherein R numbered bits among the [i(R+1)]th-[i(R+1)+R]th bits of the signal reference sequence are the (i.R)th-(i.R+R-1)th bits of the first subsequence, the rest one bit is the i-th bit of the second subsequence, i is equal to 0,1,...,N2-1, and when the values of i are different, the relative positions of the one bit and the R numbered bits are fixed. In the invention, when limiting factors exist in the reference signal sequence, the original mean ratio performance of the sequences can be well kept.

Description

A kind of generation of wireless channel measurement reference signal, sending method and related device

Technical field

The present invention relates to the communications field, particularly, relate to generation, sending method and the device of wireless channel measurement reference signal.

Background technology

Channel measurement is the communication system necessary part, as use the wireless communication system of OFDM (OFDM:Orthogonal Frequency Division Multiplexing) and/or MIMO (Multiple InputMultiple Output, multiple-input and multiple-output) technology.Present communication system is generally used reference signal, and promptly pilot tone is used for channel measurement.The called reference signal is meant and itself does not carry user data information, and is used for the signal of estimating user data place channel or other channel parameters.In the MIMO-OFDM system, need the situation (i.e. feedback) of receiving terminal report wireless channel, adjust the transmission strategy of signal to make things convenient for transmitting terminal, improve the performance of system.Reference signal in the system mainly contains at present: general pilot, dedicated pilot, leading, middle pilot tone and Sounding (no general middle translation) signal.

Middle pilot tone is meant: in the MIMO-OFDM system, take the reference signal of an OFDM symbol in a downlink radio resource frame.So-called descending, be meant that wireless signal sends to user terminal from the base station.The Sounding signal is meant: in the MIMO-OFDM system, take the reference signal of an OFDM symbol in the ascending wireless resource frame.So-called up, be meant that wireless signal sends to the base station from user terminal.The channel content that needs to measure mainly comprises order information (RI, Rank Information), channel quality information (CQI, Channel Quality Information) and pre-coding matrix sequence number (PMI, Preferred Matrix Index).

The base station numbering sum that uses in the number of reference signal sequence and the communication system is relevant, but if corresponding independent pilot frequency sequence of each numbering, then need bigger memory space in terminal, by constructing two sub-arrangement sets, from two sub-arrangement sets, respectively select a subsequence then respectively and can reduce memory space according to certain rule composition pilot frequency sequence.Simultaneously, because ofdm system itself, powerful situation can appear in the transmitting terminal signal, even above the linear working range of transmitting terminal power amplifier, causes the distortion of signal and influences the effect of channel measurement.

Therefore, need to select the low sequence of power peak-to-average force ratio (PAPR), reduce the time domain power peak of reference signal,, increase the accuracy of channel measurement so that promote the power of reference signal with respect to data-signal.Existing sequence or sequence are right at present, and as the Golay sequence, peak-to-average force ratio is not more than 2.But in the particular communication system, the applicable elements of these sequences can not satisfy usually, and such as expanding carrying out brachymemma or (by conversion) single sequence or sequence according to available sub-carrier number, then the character of sequence can be destroyed.When sending pilot frequency sequence, need to adopt rational multiplex mode, improve the accuracy of channel measurement, also will avoid (mainly being leading, preamble) obscuring with other reference signals to avoid the interference of neighbor cell.So-called subcarrier mapping is meant that a data (as sequence) are put on the subcarrier of frequency domain symbol correspondingly.How to take all factors into consideration these limiting factor design pilot frequency sequences, rational solution is not arranged at present as yet.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of generation method of wireless channel measurement reference signal, when there are some limiting factors in reference signal sequence, also can keep the character of the original peak-to-average force ratio of these sequences preferably.

In order to address the above problem, the invention provides a kind of generation method of wireless channel measurement reference signal, be used for the multi-frequency waves communication system, this generation method comprises:

According to the reference signal sequence length N _SeqSelect one first subsequence and one second subsequence, and N is arranged _Seq=N ₁+ N ₂, N ₁Be the length of first subsequence, N ₂Be the length of second subsequence, R=N ₁/ N ₂, N _Seq, N ₁, N ₂, R is a natural number, described length is represented with bit number;

Generate reference signal sequence according to described first subsequence and second subsequence, the iR～iR+R-1 the bit of R bit for this first subsequence arranged in this reference signal sequence i (R+1)～i (R+1)+R bit, all the other 1 bits are i the bit of this second subsequence, i=0,1, ..., N ₂-1, and i is when getting different value, and the relative position of this 1 bit and this R bit is fixed.

Further, above-mentioned generation method also can have following characteristics:

Described N _SeqDetermine according to following formula: N _Sc=N _Dec* N _Seq+ N ₀, wherein, N _ScBe the subcarrier number that reference signal sequence can be used, N _DecBe natural number, N ₀Be integer, 0≤N ₀＜N _Dec

And, N ₁And N ₂Value follow following agreement:

${\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">N</figure-callout>}}_1=2^{{\mathrm{\&alpha;}}_1}{10}^{{\mathrm{\&beta;}}_1}{26}^{{\mathrm{\&gamma;}}_1},$ ${\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">N</figure-callout>}}_2=2^{{\mathrm{\&alpha;}}_2}{10}^{{\mathrm{\&beta;}}_2}{26}^{{\mathrm{\&gamma;}}_2}$

Wherein, α ₁, β ₁, γ ₁, α ₂, β ₂, γ ₂〉=0, α ₁〉=α ₂

Further, above-mentioned generation method also can have following characteristics: the formula during according to described first subsequence and second subsequence generation reference signal sequence is as follows:

Wherein,

Be the reference signal sequence that will generate, Be first subsequence, gather from first subsequence

Select,

Be second subsequence, gather from second subsequence Select m ₁=0,1 ..., M ₁-1, m ₂=0,1 ..., M ₂-1, M ₁, M ₂Be respectively G ₁, G ₂In the subsequence number that comprises, L=R+1, m=0,1 ..., N _Seq-1, m ₀Be integer, and 0≤m ₀≤ R, subscript g (m ₁, m ₂) be m ₁, m ₂Function, mod (x, y)=xmody, the expression modular arithmetic.

Further, above-mentioned generation method also can have following characteristics:

Described g (m ₁, m ₂) equaling Cell_ID, Cell_ID is that the sequence number of base station, sector or sub-district has:

m ₁＝Cell_ID _b(m′:1)，m ₂＝Cell_ID _b(m″:m′+1)

Wherein, Cell_ID _bBe the binary representation of Cell_ID, Cell_ID _b(m ': 1) the order intercepting binary number Cell_ID of big-endian is pressed in expression _bM ' to the 1st, Cell_ID _b(m ": m '+1) the order intercepting binary number Cell_ID of big-endian is pressed in expression _bM " to m '+1, m ', m " being natural number, m '＜m ", M ₁=2 ^{M '}, M ₂=2 ^{M " m '}

Further, above-mentioned generation method also can have following characteristics: m ₀=0, R or R/2.

Further, above-mentioned generation method also can have following characteristics: described first subsequence and second subsequence are the Golay complementary series.

Further, above-mentioned generation method also can have following characteristics: described reference signal is middle pilot tone or Sounding signal.

Further, above-mentioned generation method also can have following characteristics:

The subcarrier number N that described communication system is supported _FFTBe 512 multiple, the sub-carrier number N that reference signal can be used _Sc=432 * [1+log2 (N _FFT/ 512)];

N _DecThe placement of expression reference signal when frequency domain is uniformly-spaced placed represented N at interval with sub-carrier number _DecBe a fixed value or the N between 0～9 _Dec=3 * N _t, N _tNumber of transmit antennas for the dispensing device configuration that sends reference signal;

At definite N ₁, N ₂The time, make β ₁, γ ₁, β ₂, γ ₂Be 0, M ₁=8,16 or 32, M ₂=8,16 or 32.

Such scheme uses the pilot frequency sequence of two length subsequence identical or inequality (or sequence to) configurations, compare existing program, can be applicable to the more applications scene, in some limiting factors that in satisfying pilot frequency sequence, exist (as sequence is carried out brachymemma or expansion), the character that can keep these subsequence low peak average ratios preferably helps exactly measured channel and feeds back.

The another technical problem that the present invention will solve provides a kind of generation and sending method and device of wireless channel measurement reference signal, can keep the character of subsequence low peak average ratio, and makes a distinction with the targeting signal of wireless communication system.

In order to address the above problem, the invention provides a kind of generation and sending method of wireless channel measurement reference signal, be used for multi-carrier communications systems, this sending method comprises:

Generation method according to above-mentioned arbitrary wireless channel measurement reference signal generates the reference signal sequence that will send;

Dispensing device equally spaced is mapped on frequency domain on all available subcarriers except that the direct current subcarrier with reference signal sequence or to the sequence that obtains after this reference signal sequence conversion, obtain the frequency domain reference signal, send after this frequency domain reference signal is transformed to time-domain symbol.

Further, above-mentioned generation and sending method also can have following characteristics:

Described dispensing device is mapped to reference signal sequence by following formula the subcarrier of the symbol correspondence that is used for transmission of reference signals:

$m=\mathrm{0,1},\&CenterDot;\&CenterDot;\&CenterDot;,\frac{N_{\mathrm{Used}}-1}{N_{\mathrm{Dec}}}-1$

Wherein, k is the subcarrier sequence number, and S (k) expression reference signal sequence is mapped to k the data on the subcarrier,

Be

Function;

Expression is not more than the maximum integer of x, k ₀Be integer, expression is used for the sequence number of first subcarrier of transmitted reference signal, N _UsedIt is the available sub-carrier number that comprises the direct current subcarrier.

Further, above-mentioned generation and sending method also can have following characteristics:

$f\left[G_{g({\mathrm{<figure-callout\; id="1"\; label="m"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">m</figure-callout>}}_1,m_2)}\left(m\right)\right]=1-2*G_{\mathrm{Cell}\_\mathrm{ID}}\left(m\right)$

Wherein, Cell_ID is the sequence number of base station, sector or sub-district, k ₀A kind of in the following manner comes value:

First kind, k ₀=n _t-1;

Second kind, k ₀For satisfying the value of following two conditions:

Wherein, k ₀=0,1 ..., 8, n is a frame number, BRO (x, 3) is the inverted order of 3 bit x;

The third, k ₀For satisfying the value of following condition:

k ₀＝n _t-1+mod(Cell_ID，3)×N _Dec

More than various in, N _tBe the number of transmit antennas of described dispensing device configuration, n _t=1,2 ..., N _tBe the transmitting antenna sequence number.

Correspondingly, the generation of wireless channel measurement reference signal provided by the invention and dispensing device comprise: subsequence provides module, is used to provide the set of first subsequence

Gather with second subsequence

G ₁In comprise M ₁Individual length is N ₁First subsequence, G ₂In comprise M ₂Individual length is N ₂Second subsequence, m ₁=0,1 ..., M ₁-1, m ₂=0,1 ..., M ₂-1, N _SeqBe the length of reference signal sequence, R=N ₁/ N ₂, N _Seq, N ₁, N ₂, R is a natural number, length is represented with bit number;

Subsequence is selected module, is used for selecting one first subsequence from the set of first subsequence

From the set of second subsequence, select one second subsequence

The sequence generation module is used for basis

With

Generate reference signal sequence, have R bit to be in this reference signal sequence i (R+1)～i (R+1)+R bit

The iR～iR+R-1 bit, all the other 1 bits are I bit, i=0,1 ..., N ₂-1, and i is when getting different value, and the relative position of this 1 bit and this R bit is fixed;

The sequence sending module, be used for the reference signal sequence that will generate or the sequence that obtains after this reference signal sequence conversion equally spaced is mapped to all available subcarriers except that the direct current subcarrier on frequency domain, obtain the frequency domain reference signal, send after transforming to time-domain symbol again.

Further, said apparatus also can have following characteristics:

Described subsequence provides first subsequence that module provides and the length N of second subsequence ₁, N ₂Value follow following agreement:

${\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">N</figure-callout>}}_1=2^{{\mathrm{\&alpha;}}_1}{10}^{{\mathrm{\&beta;}}_1}{26}^{{\mathrm{\&gamma;}}_1},$ ${\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">N</figure-callout>}}_2=2^{{\mathrm{\&alpha;}}_2}{10}^{{\mathrm{\&beta;}}_2}{26}^{{\mathrm{\&gamma;}}_2}$

Wherein, α ₁, β ₁, γ ₁, α ₂, β ₂, γ ₂〉=0, α ₁〉=α ₂, and N is arranged _Sc=N _Dec* N _Seq+ N ₀, N _ScBe the subcarrier number that reference signal sequence can be used, N _DecBe natural number, the placement interval of expression reference signal when frequency domain is uniformly-spaced placed, N ₀Be integer, 0≤N ₀＜N _Dec

Described sequence generation module basis

With

Generate reference signal sequence

The time formula as follows:

Wherein, L=R+1, m=0,1 ..., N _Seq-1, m ₀Be integer, and m ₀=0, R or R/2, subscript g (m ₁, m ₂) be m ₁, m ₂Function, mod (x, y)=xmody, the expression modular arithmetic.

Further, said apparatus also can have following characteristics:

Described subsequence selects module to select from set of first subsequence and the set of second subsequence according to following formula

With

m ₁＝Cell_ID _b(m′:1)，m ₂＝Cell_ID _b(m″:m′+1)

Wherein, Cell_ID _bBe the binary representation of Cell_ID, described g (m ₁, m ₂) equaling Cell_ID, Cell_ID is the sequence number of base station, sector or sub-district, Cell_ID _b(m ': 1) the order intercepting binary number Cell_ID of big-endian is pressed in expression _bM ' to the 1st, Cell_ID _b(m ": m '+1) the order intercepting binary number Cell_ID of big-endian is pressed in expression _bM " to m '+1, m ', m " being natural number, m '＜m ", M ₁=2 ^{M '}, M ₂=2 ^{M " m '}

Further, said apparatus also can have following characteristics:

Described sequence sending module is mapped to reference signal sequence by following formula the subcarrier of the symbol correspondence that is used for transmission of reference signals:

$m=\mathrm{0,1},\&CenterDot;\&CenterDot;\&CenterDot;,\frac{N_{\mathrm{Used}}-1}{N_{\mathrm{Dec}}}-1$

Wherein, k is the subcarrier sequence number, and S (k) expression reference signal sequence is mapped to k the data on the subcarrier, Expression is not more than the maximum integer of x, and k0 is an integer, and expression is used for the sequence number of first subcarrier of transmitted reference signal, N _UsedBe the available sub-carrier number that comprises the direct current subcarrier, Cell_ID is the sequence number of base station, sector or sub-district, k ₀A kind of in the following manner comes value:

First kind, k ₀=n _t-1;

Second kind, k ₀For satisfying the value of following two conditions:

Wherein, k ₀=0,1 ..., 8, n is a frame number, BRO (x, 3) is the inverted order of 3 bit x;

The third, k ₀For satisfying the value of following condition:

k ₀＝n _t-1+mod(Cell_ID，3)×N _Dec

More than various in, N _tBe the number of transmit antennas of described dispensing device configuration, n _t=1,2 ..., N _tBe the transmitting antenna sequence number.

Further, said apparatus also can have following characteristics:

First subsequence and second subsequence that described subsequence provides module to provide are the Golay complementary series; Described sequence sending module sends described reference signal sequence as middle pilot tone or Sounding signal.

The pilot frequency sequence that such scheme sends, compare existing program, the character that can keep the subsequence low peak average ratio, because sequence fractional reuse, has lower memory space, and these subcarrier mapping modes can avoid time domain periodic signal to occur, thereby can make a distinction with other reference signals of wireless communication system (mainly being leading).Further, be set to be used to transmit middle pilot frequency sequence, can reduce area interference, improve the accuracy of channel estimating by the part available subcarrier that satisfies the such scheme condition.

Description of drawings

Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of specification, is used to explain the present invention jointly with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:

Fig. 1 is the schematic diagram of time domain OFDM symbol.

Fig. 2 is R=2, m ₀The schematic diagram of=2 o'clock reference signal sequence constructive method.

Fig. 3 is two couples of k of the embodiment of the invention ₀=1, N _Dec=3, N _Used=433, N _FFTThe schematic diagram of the reference signal subcarrier mapping pattern of=512 o'clock certain antennas.

Fig. 4 is the schematic diagram of the cumulative distribution function (CDF) of the sequence peak-to-average force ratio that constitutes of table 1, obtains by emulation experiment.

Fig. 5 is before the Golay sequence of 3096 128 bits is shone upon and the PAPR contrast after the mapping, obtains by emulation experiment, and CDF represents cumulative distribution function, N1/N2=2.

Embodiment

Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.

In embodiments of the present invention, pilot tone or Sounding signal in the middle of reference signal refers to, but the present invention is not limited to this.Middle pilot frequency carrier wave is distributed on the whole OFDM symbol.Middle pilot tone is used for terminal and carries out channel measurement, so that obtain the down channel coefficient, at open loop MIMO (Multi Input MultiOutput, multiple-input and multiple-output) in, middle pilot tone can be used for channel quality indication (Channel QualityIndication abbreviates CQI as) to be estimated, in closed-loop MIMO, middle pilot tone can be used for pre-coding matrix sequence number (Preferred Matrix Index, calculating PMI).The base station utilizes the downlink precoding matrix sequence number of Sounding calculated signals user data, to improve the descending performance of system.

Embodiment one

For having N _FFTIn the OFDM frequency domain symbol of individual subcarrier, operable subcarrier number is N _Used, reject the direct current subcarrier, reference signal sequence can with sub-carrier number be N _Sc=N _Used-1, choose specific reference signal sequence length N _Seq, make:

N _Sc=N _Dec* N _Seq+ N ₀, N _Seq=N ₁+ N ₂=(R+1) N ₂, N wherein _Dec, N ₁, N ₂, R=N ₁/ N ₂Be natural number, 0≤N ₀＜N _DecIt is integer.

Generate two sub-arrangement sets

For length is N ₁Sequence, m ₁=0,1 ..., M ₁-1, the subsequence set

For length is N ₂Sequence, m ₂=0,1 ..., M ₂-1.Subsequence in these two sub-arrangement sets has the character of low peak average ratio.

Utilize two new reference signal sequences that sub-arrangement set generates that generate

Shown in (1.1):

L=R+1 wherein, m=0,1 ..., N _Seq-1, m ₀Be integer, and 0≤m ₀≤ R, subscript g (m ₁, m ₂) be m ₁, m ₂Function, (x y)=xmody, is modular arithmetic to mod.According to this formula, in i (R+1) in this reference signal sequence～i (R+1)+R bit, the iR～iR+R-1 the bit of R bit for this first subsequence arranged, and all the other 1 bits are i the bit of this second subsequence, and the relative position of this 1 bit and this R bit is fixed, as being the 1st bit or last 1 bit or certain the middle bit in each group, wherein, i=0,1, ..., N ₂-1.As shown in Figure 2, show R=2, m ₀, generate the schematic diagram of new reference signal sequence S by subsequence A and B at=2 o'clock.

In the present embodiment, g (m ₁, m ₂) equaling Cell_ID, Cell_ID is the sequence number of base station, sector or sub-district, uses y=x _b(m ': 1) expression press m ' that the order of big-endian intercepts binary number x to the 1st, has:

m ₁＝Cell_ID _b(m′:1)，m ₂＝Cell_ID _b(m″:m′+1)，(1.2)

Wherein, m ', m " being natural number, m '＜m ", M ₁=2 ^{M '}, M ₂=2 ^{M " m '}Because adopting the sequence number of base station, sector or sub-district determines from the selected subsequence of subsequence set, the interference that can avoid neighbor cell to adopt identical reference signal sequence to produce.

Dispensing device is mapped to reference signal sequence the subcarrier of the symbol correspondence that is used for transmission of reference signals by the mode shown in (1.3):

$m=\mathrm{0,1},\&CenterDot;\&CenterDot;\&CenterDot;,\frac{N_{\mathrm{Used}}-1}{N_{\mathrm{Dec}}}-1---\left(1.3\right)$

Wherein, k is the subcarrier sequence number, and S (k) expression reference signal sequence is mapped to k the data on the subcarrier,

Be

Function;

Expression is not more than the maximum integer of x; k ₀Be integer, expression is used for the sequence number of first subcarrier of transmitted reference signal, by N ₀, transmitting antenna the factors such as sequence number of sequence number, sub-district (or sector, base station, segmentation) sequence number, subframe sequence number, frame number, OFDM symbol among one or more decision.

According to following formula, reference signal sequence can be evenly distributed on the N except that the direct current subcarrier _Sc-N ₀On the individual available subcarrier, the signal that the direct current subcarrier sends is 0.

Frequency domain reference signal S needs to transform to the time domain OFDM symbol before transmission, as adopting:

$s\left(t\right)=\mathrm{Re}\{{\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">e</figure-callout>}}^j\underset{\underset{k\&NotEqual;\frac{N_{\mathrm{used}}-1}{2}}{k=0}}{\overset{k=N_{\mathrm{used}}-1}{\mathrm{\&Sigma;}}}S\left(k\right)\&CenterDot;{\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">e</figure-callout>}}^j\}---\left(1.4\right)$

In the formula, f _cBe the center carrier frequencies of system, Δ f is the sub-carrier frequencies interval, T _gBe the prefix length of OFDM symbol, 0≤t≤T _S, T _SBe the length of OFDM symbol, referring to Fig. 1; K element of S (k) expression sequence, k=0,1 ..., N _Used-1.The present invention also can adopt other existing frequency domain reference signal sequence S to be transformed to the mode of time domain OFDM symbol, no longer explanation among the aftermentioned embodiment.

Above-mentioned dispensing device can have the system equipment of controlled function or the dispensing device of terminal equipments such as mobile phone, palmtop PC for base station or relay station etc.

The G of present embodiment ₁, G ₂In subsequence be Golay complementary series (being also referred to as the Golay sequence), be not limited thereto sequence certainly, also can make other sequences that has the low-power peak-to-average force ratio arbitrarily, wherein the definition of Golay sequence and generation method are as follows:

The non-periodic autocorrelation function of defined nucleotide sequence a is:

${\mathrm{\&rho;}}_a\left(k\right)=\underset{i=0}{\overset{N-k-1}{\mathrm{\&Sigma;}}}a\left(i\right)a(i+k),$ 0≤k≤N-1 (1.5)

Wherein N is the length of sequence.If sequence to (a b) satisfies following condition, then is called the Golay complementary series:

ρ _a(k)+ρ _b(k)＝0，k≠0 (1.6)

In the present embodiment, N ₁And N ₂Value follow following agreement:

${\mathrm{<figure-callout\; id="1"\; label="N"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">N</figure-callout>}}_1=2^{{\mathrm{\&alpha;}}_1}{10}^{{\mathrm{\&beta;}}_1}{26}^{{\mathrm{\&gamma;}}_1},$ ${\mathrm{<figure-callout\; id="2"\; label="N"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">N</figure-callout>}}_2=2^{{\mathrm{\&alpha;}}_2}{10}^{{\mathrm{\&beta;}}_2}{26}^{{\mathrm{\&gamma;}}_2}---\left(1.7\right)$

Be natural number, α ₁, β ₁, γ ₁, α ₂, β ₂, γ ₂〉=0.Especially, work as β ₁=γ ₁=β ₂=γ ₂=0 o'clock, have

α ₁〉=α ₂Utilize formula (1.7) and N _Seq(N _Seq=N ₁+ N ₂) can calculate corresponding N ₁And N ₂

G ₁In sequence be that length is N ₁The Golay sequence, G ₂In sequence be that length is N ₂The Golay sequence, N ₁, N ₂Satisfy formula (1.7), utilize formula (1.1) to generate reference signal sequence.

Below each embodiment be based on the concrete utilization of embodiment one.

Embodiment two

The subcarrier number of supposing a MIMO-OFDM wireless communication system is N _FFT=512, configuration N _t=2 transmitting antennas, sub-district, sector or base station be numbered Cell_ID, reject the direct current subcarrier, reference signal is at N _ScPress N on the individual subcarrier _Dec=3 uniformly-spaced place promptly every N _DecHave 1 subcarrier to be used to place reference signal in the individual subcarrier, reference signal can with sub-carrier number be 432, corresponding N ₁=128, N ₂=16.

The corresponding reference burst is obtained by following formula:

Cell_ID wherein _bBe binary representation, ∏ _{X, y}Represent a subsequence, x is the lateral coordinates of table 1, and y is the along slope coordinate of table 1, such as ∏ _0,1=9AC0." others " expression " when m is worth for other ", " others " in other formulas herewith.

Suppose Cell_ID=(110011101) _b=413, Cell_ID is then arranged _b(8:5)=(1001) _b=9, Cell_ID _b(4:1)=(1101) _b=13, log ₂(N _FFT/ 512)=1, have:

Table 1

Reference signal sequence is mapped on the subcarrier by following rule:

$m=\mathrm{0,1},\&CenterDot;\&CenterDot;\&CenterDot;,\frac{N_{\mathrm{Used}}-1}{9}-1---\left(1.10\right)$

k ₀For satisfying the value of following condition: k ₀=n _t-1 (1.11)

Wherein, N _tBe the number of transmit antennas that the dispensing device that sends reference signal disposes, n _t=1,2 ..., N _tBe the transmitting antenna sequence number.

Fig. 3 is k ₀=1, N _Dec=3, N _Used=433, N _FFTThe schematic diagram of the reference signal subcarrier mapping pattern of=512 o'clock certain antennas.N wherein _FFTBe counting of the discrete Fourier transform of frequency domain transform during to time domain, that is the subcarrier number of frequency domain symbol.

Embodiment three

If the subcarrier number that MIMO-OFDM wireless communication system can be supported is N _FFT=512,1024,2,048 three kinds, each N _FFTCorresponding different system bandwidth, sub-district, sector or base station be numbered Cell_ID, the reference signal on the every day line is pressed N except that the direct current carrier wave _Dec=9 uniformly-spaced place, reference signal can with sub-carrier number be 432 * [1+log ₂(N _FFT/ 512)], corresponding N ₁=N _FFT/ 16, N ₂=N _FFT/ 32.

The corresponding reference burst is obtained by following formula under the different system bandwidth:

Cell_ID wherein _bBe binary representation, ∏ _{X, y}Be a subsequence, x is the lateral coordinates of table 2, and y is an along slope coordinate, such as ∏ _0,1=9AC0.Cell_ID=(110011101) for example _b=413, N _FFT=1024, Cell_ID then _b(8:5)=(1001) _b=9, Cell_ID _b(4:1)=(1101) _b=13, log ₂(N _FFT/ 512)=1, M ₁=M ₂=16, have:

Table 2 ∏ _{X, y}Hexadecimal representation (left side is a low level)

Reference signal sequence is mapped on the subcarrier by following rule:

$m=\mathrm{0,1},\&CenterDot;\&CenterDot;\&CenterDot;,\frac{N_{\mathrm{Used}}-1}{9}-1---\left(1.14\right)$

k ₀For satisfying the value of following two conditions:

Wherein, k ₀=0,1 ..., 8, n _t=1,2 ..., N _tBe the transmitting antenna sequence number, n is a frame number, and BRO (x, 3) is the inverted order of 3 bit x.

First becomes example, and the subsequence set G1 of this change row has 16 subsequences, and 32 subsequences are arranged among the G2, and other parameters are all identical with embodiment three, become in the example M at this ₁=16, m '=4, M ₂=32, m "=9, correspondingly, the corresponding reference burst is obtained by following formula under the different system bandwidth:

Cell_ID wherein _bBe binary representation, ∏ _{X, y}Be a subsequence, x is the lateral coordinates of table 2, and y is an along slope coordinate, such as ∏ _0,1=9AC0.Cell_ID=(110011101) for example _b=413, N _FFT=1024, Cell_ID then _b(9:5)=(1001) _b=25, Cell_ID _b(4:1)=(1101) _b=13, log ₂(N _FFT/ 512)=1, have:

The mapping mode of reference signal sequence is constant, shown in (1.14) (1.15) (1.16).

Second becomes example, and the subsequence set G1 of this changes example has 32 subsequences, and 16 subsequences are arranged among the G2, other parameters all with the embodiment three-phase while, in this change example, owing to M ₁=32, m '=5, M ₂=16, m "=9.Correspondingly, the corresponding reference burst is obtained by following formula under the different system bandwidth:

Cell_ID wherein _bBe binary representation, ∏ _{X, y}Be a subsequence, needing table 2 lateral coordinates be that subsequence number in the subsequence set of 2 row correspondence is increased to 32, and then x is the lateral coordinates of this table, and y is an along slope coordinate, such as ∏ _0,1=9AC0.Cell_ID=(110011101) for example _b=413, N _FFT=1024, Cell_ID then _b(9:6)=(1100) _b=12, Cell_ID _b(5:1)=(11101) _b=29, log ₂(N _FFT/ 512)=1, have:

The mapping mode of reference signal sequence is constant, shown in (1.14) (1.15) (1.16).

The 3rd becomes example, the M of this change example ₀Value be mod (Cell_ID, 3), other parameters are all identical with embodiment three, correspondingly, the corresponding reference burst is obtained by following formula under the different system bandwidth:

Cell_ID wherein _bBe binary representation, ∏ _{X, y}Represent a sequence, x is the lateral coordinates of table 2, and y is an along slope coordinate, such as ∏ _0,1=9AC0.Cell_ID=(110011101) for example _b=413, N _FFT=1024, Cell_ID then _b(8:5)=(1001) _b=9, Cell_ID _b(4:1)=(1101) _b=13, log ₂(N _FFT/ 512)=1, mod (Cell_ID, 3)=2 has:

The mapping mode of reference signal sequence is constant, shown in (1.14) (1.15) (1.16).

Embodiment four

The subcarrier number that MIMO-OFDM wireless communication system can be supported is N _FFT=512,1024,2,048 three kinds, each N _FFTCorresponding different system bandwidths can be configured to N _t=2,4,8 antennas, sub-district, sector or base station be numbered Cell_ID, reject the direct current subcarrier, reference signal is at N _ScPress N on the individual subcarrier _Dec=3 * N _tUniformly-spaced place, reference signal can with sub-carrier number be 432 * [1+log ₂(N _FFT/ 512)], corresponding N ₁=N _FFT/ (4 * N _t), N ₂=N _FFT/ (32 * N _t).

The corresponding reference burst is obtained by following formula under the different system bandwidth:

Cell_ID wherein _bBe binary representation, ∏ _{X, y}Be a subsequence, x is the lateral coordinates of table 3, and y is an along slope coordinate, such as ∏ _0,1=9AC0.Cell_ID=(110011101) for example _b=413, N _FFT=1024, N _t=2, Cell_ID then _b(8:5)=(1001) _b=9, Cell_ID _b(4:1)=(1101) _b=13, log ₂(N _FFT/ 512)=1, M ₁=M ₂=16, have:

Table 3 ∏ _{X, y}Hexadecimal representation (left side is a low level)

Continuous table 3

∏ x，y	5
		0	0505363639390A0AFA05C936C639F50A50AF639C6C935FA0AFAF9C9C9393A0A0
1	555A00F05A550FFF666933C39699C333666933C369663CCC555A00F0A5AAF000
		2	114B1E44EEB4E1BB114BE1BBEEB41E4422782D7722782D772278D2882278D288
3	05363605F5C6C6F50536C9FAF5C6390A509C63AFA06C935F509C9C50A06C6CA0
		4	1122447711DD44881E2D4B78E12DB478E1D2B487E12DB478EEDDBB8811DD4488
5	1111EE1122DDDDDD4B4BB44B788787871E1EE11E2DD2D2D24444BB4477888888
		6	111111EE22DD22224B4B4BB478877878E1E1E11ED22DD2D2BBBBBB4488778888
7	00CC559933FF66AA0FC35A96C30F965A0FC3A5693CF0965A00CCAA66CC0066AA
		8	121212EDED12EDED4747B847B84747471D1D1DE2E21DE2E24848B748B7484848
9	050AC9C63639FAF505F5C939C93905F5505F9C93636CAFA050A09C6C9C6C50A0
		10	000F555A5A550F0033C3669669993CCC000FAAA55A55F0FF33C399696999C333

11	050A36393639050A05F5C93936C6FA0AAFA09C939C93AFA0AF5F63939C6C50A0
		12	1212E2E24747B7B712EDE21D47B8B74812EDE21DB84748B71212E2E2B8B84848
13	00335A690F3C55663300695A3C0F665500CC5A96F03CAA6633FF69A5C30F9955
		14	00550F5A5A0F55003366C396693C99CC00AA0FA55AF055FF3399C36969C39933
15	14271B28EBD8E4D714D81BD7EB27E4281427E4D71427E4D714D8E42814D8E428
		16	00330F3C3C0F330055995A9669A566AA0033F0C33C0FCCFF5599A56969A59955
17	141414EB14EB14141B1B1BE4E41BE4E4D8D8D827D827D8D8D7D7D72828D72828
		18	00330F3C0FC300CC6655695A69A566AA0033F0C30FC3FF33665596A569A59955
19	00F066960FFF699955A533C35AAA3CCC33C355A5C333A555669600F09666F000
		20	000F33C3333C00F0AAA599699996AA5A5A55699969665AAAF0FFC333C3CCF000
21	00330F3C0FC300CC5566A5965A96AA66AA99A596A569AA66FFCC0F3CF03C00CC
		22	124712471D481D48EDB81247E2B71D4812B8ED471DB7E248ED47ED47E248E248
23	00333C0F0F3C33005566695AA59699AA00CC3CF00FC333FF559969A5A5699955
		24	141414EB1B1B1BE414EB14141BE41B1B141414EBE4E4E41BEB14EBEB1BE41B1B
25	00F033C30FFFC333669655A56999A55555A566965AAA966633C300F03CCCF000
		26	0536AF9C36059CAF0536AF9CC9FA63500A39A093390A93A0F5C65F6C390A93A0
27	0536360550636350FA36C905AF639C500536C9FAAF9C6350FA3636FA509C9C50
		28	000F3C33333C0F00555A696666695A55000F3C33CCC3F0FFAAA5969966695A55
29	005566330F5A693C00AA66CC0FA569C300556633F0A596C3FF5599330FA569C3
		30	00553399336600AA5A0F69C3693C5AF000553399CC99FF555A0F69C396C3A50F
31	00550F5A0F5A00556633693C693C663300AAF05A0FA5FF5566CC963C69C39933

Reference signal sequence is mapped on the subcarrier by following rule:

$m=\mathrm{0,1},\&CenterDot;\&CenterDot;\&CenterDot;,\frac{N_{\mathrm{Used}}-1}{9}-1---(1.25)$

Wherein: k ₀For satisfying the value of following condition:

k ₀＝n _t-1+mod(Cell_ID，3)×N _Dec (1.26)

n _t=1,2 ..., N _tBe the transmitting antenna sequence number.

First becomes example, and the subsequence set G1 of this change example has 16 subsequences, and 32 subsequences are arranged among the G2, and other parameters are all identical with embodiment four.Become in the example at this, because M ₁=16, m '=4, M ₂=32, so m "=9.Correspondingly, the corresponding reference burst is obtained by following formula under the different system bandwidth:

Cell_ID wherein _bBe binary representation, ∏ _{X, y}Represent a sequence, x is the lateral coordinates of table 3, and y is an along slope coordinate, such as ∏ _0,1=9AC0.Cell_ID=(110011101) for example _b=413, N _FFT=1024, N _t=2, Cell_ID then _b(9:5)=(11001) _b=25, Cell_ID _b(4:1)=(1101) _b=13, log ₂(N _FFT/ 512)=1, have:

The mapping mode of reference signal sequence is constant, shown in (1.25) (1.26).

Second becomes example, and the subsequence set G1 of this change example has 32 subsequences, and 16 subsequences are arranged among the G2, and other parameters are all identical with embodiment four.Become in the example at this, because M ₁=32, m '=5, M ₂=16, so m "=9.Correspondingly, the corresponding reference burst is obtained by following formula under the different system bandwidth:

Cell_ID wherein _bBe binary representation, ∏ _{X, y}Represent a sequence, x is the lateral coordinates of table 3, and y is an along slope coordinate, such as ∏ _0,1=9AC0.Cell_ID=(110011101) for example _b=413, N _FFT=1024, N _t=2 Cell_ID _b(9:6)=(1100) _b=12, Cell_ID _b(5:1)=(11101) _b=29, log ₂(N _FFT/ 512)=1, have:

The mapping mode of reference signal sequence is constant, shown in (1.25) (1.26).

The 3rd becomes example, the M of this change example ₀Value be 4*mod (Cell_ID, 3), other parameters are all identical with embodiment four, correspondingly, the corresponding reference burst is obtained by following formula under the different system bandwidth:

Cell_ID wherein _bBe binary representation, ∏ _{X, y}Be a subsequence, x is the lateral coordinates of table 3, and y is an along slope coordinate, such as ∏ _0,1=9AC0.Cell_ID=(110011101) for example _b=412, N _FFT=1024, N _t=2, Cell_ID then _b(8:5)=(1001) _b=9, Cell_ID _b(4:1)=(1100) _b=12, log ₂(N _FFT/ 512)=1,4*mod (Cell_ID, 3)=4 has:

The mapping mode of reference signal sequence is constant, shown in (1.25) (1.26).

The PAPR of the reference signal sequence of such scheme generation once is described below theoretically.

PAPR is defined as:

$\mathrm{PAPR}=\frac{\max {\left|\right|x_n\left|\right|}^2}{{\left|\right|x\left|\right|}^2/N}---\left(2.1\right)$

X=[x wherein ₀, x ₁, x ₂..., x _N-1] ^TBe the signal on the time domain, and

$x_n=\frac{1}{N}\underset{k=0}{\overset{N-1}{\mathrm{\&Sigma;}}}{c}_{\mathrm{<figure-callout\; id="2"\; label="k\; e\; j"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">k</figure-callout>}}{e}^j{\frac{2\mathrm{\&pi;kn}}{N}}^{},$ n＝1，2，…，N-1 (2.2)

Wherein, c _kBe the data on the subcarrier k.In the real system, digital signal finally transfers analog signal to, and the oversampling that generally carries out four times gets final product.Adopt 8 times of oversamplings when supposing emulation.That is:

$X_{\mathrm{oversample}}=\left\{\begin{array}{c}X\left(k\right),k\&Element;\{-(N_{\mathrm{used}}-1)/2,\&CenterDot;\&CenterDot;\&CenterDot;,\mathrm{0,1},\&CenterDot;\&CenterDot;\&CenterDot;,(N_{\mathrm{used}}-1)/2\}\\ 0,\mathrm{others}\end{array}\right.---\left(2.3\right)$

Corresponding inverse discrete Fourier transform (IDFT) is:

$x\left(n\right)=\frac{1}{\sqrt{\mathrm{LN}}}\underset{k=-\mathrm{LN}/2}{\overset{\mathrm{LN}/2-1}{\mathrm{\&Sigma;}}}{X}_{\mathrm{oversample}}\left(k\right){\mathrm{<figure-callout\; id="2"\; label="e\; j"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">e</figure-callout>}}^j---\left(2.4\right)$

L=8 wherein.

The non-periodic autocorrelation function of defined nucleotide sequence a (Aperiodic Auto-Correlation Function AACF) is:

${\mathrm{\&rho;}}_a\left(k\right)=\underset{i=0}{\overset{N-k-1}{\mathrm{\&Sigma;}}}{a}_i{a}_{i+k},$ 0≤k≤N-1 (2.5)

Or

${\mathrm{\&rho;}}_a\left(k\right)=\underset{i=k}{\overset{N-1}{\mathrm{\&Sigma;}}}{a}_i{a}_{i-k},$ 0≤k≤N-1 (2.6)

Wherein N is the length of sequence.If sequence to (a b) satisfies following condition, then is called Golay complementary series (or Golay sequence):

ρ _a(k)+ρ _b(k)＝0，k≠0 (2.7)

If (a, related multinomial b) they are a (z), b (z), promptly

$a\left(z\right)=\underset{i=0}{\overset{N-1}{\mathrm{\&Sigma;}}}{a}_i{z}^i---\left(2.8\right)$

Then have

a(z)a(z ^-1)+b(z)b(z ^-1)＝2N (2.9)

Formula (2.7) and (2.9) equivalence, because:

$a\left(z\right)a\left(z^{-1}\right)=\underset{p=0}{\overset{N-1}{\mathrm{\&Sigma;}}}{a}_p{z}^p\underset{q=0}{\overset{N-1}{\mathrm{\&Sigma;}}}{a}_q{z}^{-q}$

$={\mathrm{\&rho;}}_a\left(0\right)+\underset{p=0}{\overset{N-1}{\mathrm{\&Sigma;}}}\underset{q=0,p\&NotEqual;q}{\overset{N-1}{\mathrm{\&Sigma;}}}{a}_p{a}_q{z}^{p-q}$

$={\mathrm{\&rho;}}_a\left(0\right)+\underset{p=0}{\overset{N-2}{\mathrm{\&Sigma;}}}\underset{q=p+1}{\overset{N-1}{\mathrm{\&Sigma;}}}{a}_q{a}_p{z}^{p-q}+\underset{p=1}{\overset{N-1}{\mathrm{\&Sigma;}}}\underset{q=0}{\overset{p-1}{\mathrm{\&Sigma;}}}{a}_q{a}_p{z}^{p-q}$

$={\mathrm{\&rho;}}_a\left(0\right)+\underset{p=0}{\overset{N-2}{\mathrm{\&Sigma;}}}\underset{k=1}{\overset{N-1-p}{\mathrm{\&Sigma;}}}{a}_{p+k}{a}_p{z}^{-k}+\underset{p=1}{\overset{N-1}{\mathrm{\&Sigma;}}}\underset{k=1}{\overset{p}{\mathrm{\&Sigma;}}}{a}_p{a}_{p-k}{z}^k---\left(2.10\right)$

$={\mathrm{\&rho;}}_a\left(0\right)+\underset{k=1}{\overset{N-1}{\mathrm{\&Sigma;}}}{z}^{-k}\underset{p=0}{\overset{N-k-1}{\mathrm{\&Sigma;}}}{a}_{p+k}{a}_p+\underset{k=1}{\overset{N-1}{\mathrm{\&Sigma;}}}{z}^k\underset{p=k}{\overset{N-1}{\mathrm{\&Sigma;}}}{a}_p{a}_{p-k}$

$={\mathrm{\&rho;}}_a\left(0\right)+\underset{k=1}{\overset{N-1}{\mathrm{\&Sigma;}}}{\mathrm{\&rho;}}_a\left(k\right)(z^k+z^{-k})$

If order

And N=N ₁, then

The IDFT of expression sequence a, so time-domain signal a _tPAPR be:

See the situation when the golay sequence uniformly-spaced placed again,

By formula (2.11), its PAPR is:

Be provided with Golay sequence a, the following formation of sequence a ':

m ₀=0,2 ^P-q, 2 ^P-q-1Then have:

PAPR(a′)≤2 (2.16)

Prove as follows:

Formula (2.8) is made an amendment slightly:

$a^{\&prime;}\left(z\right)=\underset{i=0}{\overset{N-1}{\mathrm{\&Sigma;}}}{a}_i{z}^{f_{a^{\&prime;}}\left(i\right)}---\left(2.18\right)$

And

f ₀(i-j)＝f _a′(i-j)-k ₀＝f _a′(i)-f _a′(j) (2.19)

Make k ₀=m ", following formula satisfies formula (2.19):

Formula (2.18) substitution (2.10) then has:

$a^{\&prime;}\left(z\right)a^{\&prime;}\left(z^{-1}\right)={\mathrm{\&rho;}}_a\left(0\right)+\underset{k=1}{\overset{N-1}{\mathrm{\&Sigma;}}}{\mathrm{\&rho;}}_a\left(k\right)(z^{f_0\left(k\right)}+z^{f_0(-k)})---\left(2.21\right)$

Thereby for a ' (z), formula (2.9) is set up.

Fig. 4 is L=3, m ₀The CDF of the PAPR of=0,1,2: 3096 Golay sequence.

If two Golay sequence [a ₁, a ₂] form a new sequence a, suppose that the maximum of its time domain is respectively m ₁, m ₂And drop on the same quadrant of complex plane, then, then have because DFT is linear transformation:

$\mathrm{PAPR}\left(a\right)\&le;\frac{({\mathrm{<figure-callout\; id="1"\; label="m"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">m</figure-callout>}}_1+m_2)*({\mathrm{<figure-callout\; id="1"\; label="m"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">m</figure-callout>}}_1+m_2)}{{\stackrel{\&OverBar;}{P}}_1+{\stackrel{\&OverBar;}{P}}_2}=\frac{{\left|{\mathrm{<figure-callout\; id="1"\; label="m"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">m</figure-callout>}}_1\right|}^2+{\left|{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">m</figure-callout>}}_2\right|}^2+2\&times;\mathrm{real}({\mathrm{<figure-callout\; id="1"\; label="m"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">m</figure-callout>}}_1*m_2)}{{\stackrel{\&OverBar;}{P}}_1+{\stackrel{\&OverBar;}{P}}_2}---\left(108\right)$

$\&le;2\frac{{\left|{\mathrm{<figure-callout\; id="1"\; label="m"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">m</figure-callout>}}_1\right|}^2+{\left|{\mathrm{<figure-callout\; id="2"\; label="m"\; filenames="H2009101760379E0000012.png,H2009101760379E0000021.png"\; state="\{\{state\}\}">m</figure-callout>}}_2\right|}^2}{{\stackrel{\&OverBar;}{P}}_1+{\stackrel{\&OverBar;}{P}}_2}=4$

Fig. 5 is the forward and backward PAPR contrast of mapping, shines upon forward and backward PAPR as can be seen and changes very little.

By above explanation as can be seen, embodiments of the invention when having limiting factor as expansion or brachymemma, can keep the character of low peak average ratio with the reference signal sequence of the subsequence formation of two low peak average ratios.

Such scheme also can use at wireless communication system of multicarrier code division multiplexing (MC-CDMA:Multi-Carrier CodeDivision Multiple Access) and/or MIMO technology or the like.

Claims (16)

1. the generation method of a wireless channel measurement reference signal is used for the multi-frequency waves communication system, and this generation method comprises:

According to the reference signal sequence length N _SeqSelect one first subsequence and one second subsequence, and N is arranged _Seq=N ₁+ N ₂, N ₁Be the length of first subsequence, N ₂Be the length of second subsequence, R=N ₁/ N ₂, N _Seq, N ₁, N ₂, R is a natural number, described length is represented with bit number;

Generate reference signal sequence according to described first subsequence and second subsequence, the iR～iR+R-1 the bit of R bit for this first subsequence arranged in this reference signal sequence i (R+1)～i (R+1)+R bit, all the other 1 bits are i the bit of this second subsequence, i=0,1, ..., N ₂-1, and i is when getting different value, and the relative position of this 1 bit and this R bit is fixed.

2. generation method as claimed in claim 1 is characterized in that:

Described N _SeqDetermine according to following formula: N _Sc=N _Dec* N _Seq+ N ₀, wherein, N _ScBe the subcarrier number that reference signal sequence can be used, N _DecBe natural number, N ₀Be integer, 0≤N ₀＜N _Dec

And, N ₁And N ₂Value follow following agreement:

$N_1=2^{{\mathrm{\&alpha;}}_1}{10}^{{\mathrm{\&beta;}}_1}{26}^{{\mathrm{\&gamma;}}_1},$ $N_2=2^{{\mathrm{\&alpha;}}_2}{10}^{{\mathrm{\&beta;}}_2}{26}^{{\mathrm{\&gamma;}}_2}$

Wherein, α ₁, β ₁, γ ₁, α ₂, β ₂, γ ₂〉=0, α ₁〉=α ₂

3. generation method as claimed in claim 2 is characterized in that, the formula during according to described first subsequence and second subsequence generation reference signal sequence is as follows:

Wherein,

Be the reference signal sequence that will generate,

Be first subsequence, gather from first subsequence

Select,

Be second subsequence, gather from second subsequence

Select m ₁=0,1 ..., M ₁-1, m ₂=0,1 ..., M ₂-1, M ₁, M ₂Be respectively G ₁, G ₂In the subsequence number that comprises, L=R+1, m=0,1 ..., N _Seq-1, m ₀Be integer, and 0≤m ₀≤ R, subscript g (m ₁, m ₂) be m ₁, m ₂Function, mod (x, y)=xmody, the expression modular arithmetic.

4. generation method as claimed in claim 3 is characterized in that:

Described g (m ₁, m ₂) equaling Cell_ID, Cell_ID is that the sequence number of base station, sector or sub-district has:

m ₁＝Cell_ID _b(m′:1)，m ₂＝Cell_ID _b(m″:m′+1)

Wherein, Cell_ID _bBe the binary representation of Cell_ID, Cell_ID _b(m ': 1) the order intercepting binary number Cell_ID of big-endian is pressed in expression _bM ' to the 1st, Cell_ID _b(m ": m '+1) the order intercepting binary number Cell_ID of big-endian is pressed in expression _bM " to m '+1, m ', m " being natural number, m '＜m ", M ₁=2 ^{M '}, M2=2 ^{M " m '}

5. generation method as claimed in claim 3 is characterized in that m ₀=0, R or R/2.

6. generation method as claimed in claim 1 is characterized in that, described first subsequence and second subsequence are the Golay complementary series.

7. generation method as claimed in claim 1 is characterized in that, described reference signal is middle pilot tone or Sounding signal.

8. as claim 3 or 4 described generation methods, it is characterized in that:

The subcarrier number N that described communication system is supported _FFTBe 512 multiple, the sub-carrier number N that reference signal can be used _Sc=432 * [1+log ₂(N _FFT/ 512)];

N _DecThe placement of expression reference signal when frequency domain is uniformly-spaced placed represented N at interval with sub-carrier number _DecBe a fixed value or the N between 0～9 _Dec=3 * N _t, N _tNumber of transmit antennas for the dispensing device configuration that sends reference signal;

At definite N ₁, N ₂The time, make β ₁, γ ₁, β ₂, γ ₂Be 0, M ₁=8,16 or 32, M ₂=8,16 or 32.

9. the generation of a wireless channel measurement reference signal and sending method are used for multi-carrier communications systems, and this sending method comprises:

Generate the reference signal sequence that will send according to the described generation method of arbitrary claim in the claim 1～7;

Dispensing device equally spaced is mapped on frequency domain on all available subcarriers except that the direct current subcarrier with reference signal sequence or to the sequence that obtains after this reference signal sequence conversion, obtain the frequency domain reference signal, send after this frequency domain reference signal is transformed to time-domain symbol.

10. generation as claimed in claim 9 and sending method is characterized in that:

Described dispensing device is mapped to reference signal sequence by following formula the subcarrier of the symbol correspondence that is used for transmission of reference signals:

$m=\mathrm{0,1},\&CenterDot;\&CenterDot;\&CenterDot;,\frac{N_{\mathrm{Used}}-1}{N_{\mathrm{Dec}}}-1$

Wherein, k is the subcarrier sequence number, and S (k) expression reference signal sequence is mapped to k the data on the subcarrier, Be

Function;

Expression is not more than the maximum integer of x, k ₀Be integer, expression is used for the sequence number of first subcarrier of transmitted reference signal, N _UsedIt is the available sub-carrier number that comprises the direct current subcarrier.

11. generation as claimed in claim 10 and sending method is characterized in that:

$f\left[G_{g(m_1,m_2)}\left(m\right)\right]=1-2*G_{\mathrm{Cell}\_\mathrm{ID}}\left(m\right)$

Wherein, Cell_ID is the sequence number of base station, sector or sub-district, k ₀A kind of in the following manner comes value:

First kind, k ₀=n _t-1;

Second kind, k ₀For satisfying the value of following two conditions:

Wherein, k ₀=0,1 ..., 8, n is a frame number, BRO (x, 3) is the inverted order of 3 bit x;

The third, k ₀For satisfying the value of following condition:

k ₀＝n _t-1+mod(Cell_ID，3)×N _Dec

More than various in, N _tBe the number of transmit antennas of described dispensing device configuration, n _t=1,2 ..., N _tBe the transmitting antenna sequence number.

12. the generation of a wireless channel measurement reference signal and dispensing device comprise that subsequence provides module, are used to provide the set of first subsequence

Gather with second subsequence

G ₁In comprise M ₁Individual length is N ₁First subsequence, G ₂In comprise M ₂Individual length is N ₂Second subsequence, m ₁=0,1 ..., M ₁-1, m ₂=0,1 ..., M ₂-1, N _SeqBe the length of reference signal sequence, R=N ₁/ N ₂, N _Seq, N ₁, N ₂, R is a natural number, length is represented with bit number;

Subsequence is selected module, is used for selecting one first subsequence from the set of first subsequence

From the set of second subsequence, select one second subsequence

The sequence generation module is used for basis

With

Generate reference signal sequence, have R bit to be in this reference signal sequence i (R+1)～i (R+1)+R bit

The iR～iR+R-1 bit, all the other 1 bits are I bit, i=0,1 ..., N ₂-1, and i is when getting different value, and the relative position of this 1 bit and this R bit is fixed;

The sequence sending module, be used for the reference signal sequence that will generate or the sequence that obtains after this reference signal sequence conversion equally spaced is mapped to all available subcarriers except that the direct current subcarrier on frequency domain, obtain the frequency domain reference signal, send after transforming to time-domain symbol again.

13. generation as claimed in claim 12 and dispensing device is characterized in that:

Described subsequence provides first subsequence that module provides and the length N of second subsequence ₁, N ₂Value follow following agreement:

$N_1=2^{{\mathrm{\&alpha;}}_1}{10}^{{\mathrm{\&beta;}}_1}{26}^{{\mathrm{\&gamma;}}_1},$ $N_2=2^{{\mathrm{\&alpha;}}_2}{10}^{{\mathrm{\&beta;}}_2}{26}^{{\mathrm{\&gamma;}}_2}$

Wherein, α ₁, β ₁, γ ₁, α ₂, β ₂, γ ₂〉=0, α ₁〉=α ₂, and N is arranged _Sc=N _Dec* N _Seq+ N ₀, N _ScBe the subcarrier number that reference signal sequence can be used, N _DecBe natural number, the placement interval of expression reference signal when frequency domain is uniformly-spaced placed, N ₀Be integer, 0≤N ₀＜N _Dec

Described sequence generation module basis

With

Generate reference signal sequence

The time formula as follows:

Wherein, L=R+1, m=0,1 ..., N _Seq-1, m ₀Be integer, and m ₀=0, R or R/2, subscript g (m ₁, m ₂) be m ₁, m ₂Function, mod (x, y)=xmody, the expression modular arithmetic.

14. generation as claimed in claim 13 and dispensing device is characterized in that:

Described subsequence selects module to select from set of first subsequence and the set of second subsequence according to following formula

With

m ₁＝Cell_ID _b(m′:1)，m ₂＝Cell_ID _b(m″:m′+1)

Wherein, Cell_ID _bBe the binary representation of Cell_ID, described g (m ₁, m ₂) equaling Cell_ID, Cell_ID is the sequence number of base station, sector or sub-district, Cell_ID _b(m ': 1) the order intercepting binary number Cell_ID of big-endian is pressed in expression _bM ' to the 1st, Cell_ID _b(m ": m '+1) the order intercepting binary number Cell_ID of big-endian is pressed in expression _bM " to m '+1, m ', m " being natural number, m '＜m ", M ₁=2 ^{M '}, M ₂=2 ^{M " m '}

15., it is characterized in that as claim 12 or 13 or 14 described generation and dispensing devices:

Described sequence sending module is mapped to reference signal sequence by following formula the subcarrier of the symbol correspondence that is used for transmission of reference signals:

$m=\mathrm{0,1},\&CenterDot;\&CenterDot;\&CenterDot;,\frac{N_{\mathrm{Used}}-1}{N_{\mathrm{Dec}}}-1$

Wherein, k is the subcarrier sequence number, and S (k) expression reference signal sequence is mapped to k the data on the subcarrier,

Expression is not more than the maximum integer of x, k ₀Be integer, expression is used for the sequence number of first subcarrier of transmitted reference signal, N _UsedBe the available sub-carrier number that comprises the direct current subcarrier, Cell_ID is the sequence number of base station, sector or sub-district, k ₀A kind of in the following manner comes value:

First kind, k ₀=n _t-1;

Second kind, k ₀For satisfying the value of following two conditions:

Wherein, k ₀=0,1 ..., 8, n is a frame number, BRO (x, 3) is the inverted order of 3 bit x;

The third, k ₀For satisfying the value of following condition:

k ₀＝n _t-1+mod(Cell_ID，3)×N _Dec

More than various in, N _tBe the number of transmit antennas of described dispensing device configuration, n _t=1,2 ..., N _tBe the transmitting antenna sequence number.

16., it is characterized in that as claim 12 or 13 or 14 described generation and dispensing devices:

First subsequence and second subsequence that described subsequence provides module to provide are the Golay complementary series; Described sequence sending module sends described reference signal sequence as middle pilot tone or Sounding signal.

Images