CN106685612A

CN106685612A - Pilot signal transmission method and pilot signal transmission device in multi-carrier system

Info

Publication number: CN106685612A
Application number: CN201510751352.5A
Authority: CN
Inventors: 辛雨
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-11-06
Filing date: 2015-11-06
Publication date: 2017-05-17
Also published as: WO2017076326A1

Abstract

The invention provides a pilot signal transmission method and a pilot signal transmission device in a multi-carrier system. The method comprises transmitting pilot data by a transmitting node on three symbols which are in time domain continuity on the same sub-carrier m, wherein the pilot data are X(m,n-1), X(m,n) and X(m,n+1); m is the sequence number of the sub-carrier; n is the sequence number of a symbol; the phase difference between X(m,n-1) and X(m,n) is pi/2; the phase difference between X(m,n+1) and X(m,n) is pi/2; the phase difference between X(m,n-1) and X(m,n+1) is pi; and the module of X(m,n-1) is equal with that of X(m,n+1).

Description

The transmission method and device of pilot signal in multicarrier system

Technical field

The present invention relates in moving communicating field, more particularly to a kind of multicarrier system pilot signal transmission method and device.

Background technology

Long Term Evolution LTE (Long Term Evolution) is the radio honeycomb communication technology of 4G (Fourth Generation).LTE adopts OFDM (Orthogonal Frequency DivisionMultiplexing) technology, the running time-frequency resource that subcarrier and OFDM symbol are constituted to constitute the radio physical running time-frequency resource of LTE system.At present OFDM technology has applied in wireless communications wider.As a result of cyclic prefix CP (cyclic prefix), CP-OFDM systems can solve multidiameter delay problem, and frequency-selective channel be divide into into a set of parallel flat channel, this simplifies well channel estimation methods, and has higher precision of channel estimation.It is however, CP-OFDM systematic functions are more sensitive to deviation ratio namely more sensitive to Doppler frequency shift, this mainly due to the system spectrum leakage than larger, therefore be easily caused inter-sub-carrier interference ICI (inter-carrier interference).And, CP also occupies time resource, reduces spectrum efficiency.

Now each major company is in radio communication 5G that begins one's study (Fifth Generation) technology, wherein BMC-OQAM (Filter Bank-based MutiCarrier-Offset Quadrature AmplitudeModulation, the multicarrier Offset Quadrature Amplitude based on wave filter group is modulated) technology is possible to be adopted in 5G.In the case of subcarrier spacing identical, FBMC-OQAM symbol lengths are the half of OFDM symbol length.FBMC-OQAM is also referred to as OFDM-OQAM in the data having.FBMC-OQAM is filtered using suitable waveform (pulse shaping) function, reduces band external leakage, and also can preferably resist frequency deviation and Doppler frequency shift affects.And, FBMC-OQAM does not require to use CP, therefore is also beneficial to improve spectrum efficiency.

But, under actual weak channel, inherent intrinsic interference is there is with intersymbol between the subcarrier of FBMC-OQAM systems, with intersymbol interference than larger between particularly adjacent subcarrier, this can badly influence the channel estimating performance of receiving terminal, and then have influence on the demodulation to data.Originally the channel estimation methods of CP-OFDM systems cannot be used directly in FBMC-OQAM systems, therefore are accomplished by carrying out the pilot tone of FBMC-OQAM systems particular design and correspondingly using different channel estimation methods.

Recently some documents propose the channel estimation methods of some FBMC-OQAM systems, and one of which method is：Frequency pilot sign and data symbol are separated using empty data symbol, to reduce interference of the data symbol to frequency pilot sign, and then improves channel estimating performance.But their pilot signal overhead is than larger, and in the case of multiple antennas, it is necessary to which multiple empty data symbols separate the frequency pilot sign of every antenna, and such pilot signal overhead is just bigger, and their channel estimating performance is nor very well.Another kind of method is：Interference of the ambient data to pilot data is offset using the method for auxiliary pilot, if auxiliary pilot number is fewer, in order to offset interference, then the power of auxiliary pilot will affect the peak-to-average force ratio of signal than larger；If auxiliary pilot number is relatively more, pilot-frequency expense is may result in than larger, and their channel estimating performance is nor very well.Therefore propose that good a pilot signal design method and corresponding channel estimation methods are a major issues of current techniques needs solution in FBMC-OQAM systems.In other FBMC systems, such as GFDM (Generalized FrequencyDivision Multiplexing, broad sense frequency division multiplexing), it is also desirable to solve the problems, such as pilot signal design and corresponding channel estimation methods.Therefore it is desirable that a kind of good pilot signal design method can be proposed, it is adapted to as far as possible.

The content of the invention

The transmission method and device of pilot signal in the multicarrier system that the present invention is provided, the technical problem to be solved is the big problem of pilot signal overhead of FBMC.

To solve above-mentioned technical problem, the invention provides following technical scheme：

A kind of transmission method of pilot signal in multicarrier system, methods described includes：

Continuous three symbols of transmitting node time domain on same subcarrier m upload defeated pilot data, wherein the pilot data is：X(m,n-1)、X(m,n)、X(m,n+1)；Wherein：

M be subcarrier sequence number, n be symbol sequence number, X (m, n-1) with the phase pi/2 of X (m, n), X (m, n+1) with X (m, n) phase pi/2, and meet X (m, n-1) and X (m, n+1) phase by pi, and the mould of X (m, n-1) and X (m, n+1) is equal.

Wherein, the mould and X (m, n+1) of X (m, n-1) and X (m, n) are equal or unequal with the mould of X (m, n).

Wherein, X (m, n) is pure imaginary number.

Wherein, the subcarrier m is the equally spaced subcarrier series on frequency domain, wherein, the m=A*k+a, wherein A are positive integer；A is nonnegative integer, and a is less than A；K is integer sequence.

Wherein, when transmitting terminal transmitting antenna number is T, one group of antenna includes P root antennas, wherein, T is the positive integer more than 1, and P is the positive integer more than 1 and less than or equal to T；

In described group of P root antennas, the pilot data element X (mp1 are transmitted on arbitrarily certain root transmitting antenna p1, n-1), X (mp1, n), the data element on corresponding described group of interior other all transmitting antennas of the physical time-frequency resource of X (mp1, n+1) on identical physical time-frequency resource is set to：0th, 0,0, wherein p1 are described certain root antenna serial number；Mp1 is the subcarrier sequence number that the pilot data element is transmitted on antenna p1.

In described group of P root antennas, the pilot data element X (mp1 are transmitted on arbitrarily certain root transmitting antenna p1, n-1), X (mp1, n), the data element on corresponding described group of interior other all transmitting antennas of the physical time-frequency resource of X (mp1, n+1) on identical physical time-frequency resource is set to：Z (mp1, n-1), 0, Z (mp1, n+1), and meet that the mould of Z (mp1, n-1) and Z (mp1, n+1) is equal and phase by pi；Wherein p1 is described certain root antenna serial number；Mp1 is the subcarrier sequence number that the pilot data element is transmitted on antenna p1.

Wherein, when sending the Z (mp1 on certain root transmitting antenna p2 in described group, n-1) and Z (mp1, n+1) subcarrier with send pilot tone element X (mp2, when subcarrier n) is adjacent, then Z (mp1, n-1) and Z (mp1, n+1) by including X, (mp2, formula n) is calculated, wherein p2 is described certain root antenna serial number, and p2 is not equal to p1.

Wherein, when sending the Z (mp1 on certain root transmitting antenna p2 in described group,) and Z (mp1 n-1, n+1 subcarrier) and transmission pilot tone element X (mp2, n) when subcarrier is non-conterminous, then Z (mp1, n-1) and Z (mp1, n+1) is by including the running time-frequency resource on transmitting antenna p2 for (mp1-1, n-1), (mp1-1, n), (mp1-1, n+1), (mp1+1, n-1), (mp1+1, n), (mp1+1, n+1 the data on) are calculated, and wherein p2 is described certain root antenna serial number, and p2 is not equal to p1.

Wherein, the symbol that the pilot signal of any antenna transmission is taken in the time domain in described group with described group in other all antenna transmissions the symbol that takes in time domain of the pilot signal it is identical, the subcarrier mp spaced distributions on frequency domain, wherein mp=A*k+ap, wherein, p is per antenna serial number in group, A is the positive integer more than or equal to P, ap is the corresponding nonnegative integer less than A of pth root antenna, and the ap values of different antennae are different, and k is integer sequence.

Wherein, when transmitting terminal transmitting antenna number is P*Q, transmitting antenna has Q groups, every group of P root antenna；In every group of antenna, the symbol that the pilot signal of any antenna transmission is taken in the time domain with described group in other all antenna transmissions the symbol that takes in time domain of the pilot signal it is identical, the subcarrier mp spaced distributions on frequency domain, that is mp=A*k+ap, wherein, P and Q is positive integer, P is more than 1, p is per antenna serial number in group, A is the positive integer more than or equal to P, ap is the corresponding nonnegative integer less than A of pth root antenna, and the ap values of different antennae are different, and k is the integer sequence of certain length.

Wherein, the antenna of different groups uses three incomplete same continuous symbols.

When transmitting terminal transmitting antenna number is T, one group of antenna includes P root antennas, in described group of P root antennas, in transmitting antenna p1 defeated pilot signal is uploaded, wherein：

Transmit the pilot signal physical time-frequency resource (mp1, n) in corresponding described group on other all transmitting antennas same sub-carrier with the physical time-frequency resource character position centered on continuous three symbols on data element be：Z(mp1,n-1)、0、Z(mp1,n+1)；

Wherein, the mould of Z (mp1, n-1) and Z (mp1, n+1) is equal and phase by pi, wherein, T is the positive integer more than 1, and P is the positive integer more than 1 and less than or equal to T；P1 is described certain root antenna serial number；Mp1 is the subcarrier sequence number that the pilot data element is transmitted on antenna p1, and n is the symbol sequence number of transmission certain pilot signal on antenna p1.

Wherein, in described group in P roots antenna, the symbol that the pilot signal of any antenna transmission is taken in the time domain with described group in other all antenna transmissions the symbol that takes in time domain of the pilot signal it is identical, the subcarrier mp spaced distribution, i.e. mp=A*k+ap on frequency domain, wherein, p is that, per antenna serial number in group, A is the positive integer more than or equal to P, and ap is the corresponding nonnegative integer less than A of pth root antenna, the ap values of different antennae are different, and k is integer sequence.

Receiving node receives the pilot data transmitted on continuous three symbols of time domain on same subcarrier m, wherein described pilot data is sent according to the method as described in claim 1 to 11 is arbitrary, or, it is to send according to the method as described in right 12 to 15 is arbitrary；

The receiving node carries out channel estimating operation using the pilot data.

A kind of transmitting device of pilot signal in multicarrier system, described device includes：

First transport module, uploads defeated pilot data, wherein the pilot data is for continuous three symbols of time domain on same subcarrier m：X(m,n-1)、X(m,n)、X(m,n+1)；Wherein：

Wherein, X (m, n) is pure imaginary number.

Second transport module, for when transmitting terminal transmitting antenna number is T, one group of antenna to include P root antennas, in described group of P root antennas, in transmitting antenna p1 defeated pilot signal is uploaded, wherein：

Receiver module, for receiving the pilot data transmitted on continuous three symbols of time domain on same subcarrier m, wherein the pilot data is sent according to any of the above-described described device；

Processing module, for carrying out channel estimating operation using the pilot data.

The embodiment that the present invention is provided, the pilot design of the present invention can not only improve the signal to noise ratio that receiving node is detected to pilot point combined signal, and can offset the interference on adjacent sub-carrier and the interference between each antenna, but also can save separate interference physical time-frequency resource, it is general in the multiple systems based on time-frequency physical resource, the channel estimating performance of FBMC systems or other systems with time-frequency as physical resource can be well improved using the present invention, and pilot-frequency expense is relatively small.

Description of the drawings

Pilot signal continuous distributed schematic diagram on frequency domain on FBMC-OQAM system time frequency physical resources that Fig. 1 is provided for the present invention；

Fig. 2 for the present invention provide on FBMC-OQAM system time frequency physical resources, pilot signal is spaced apart schematic diagram on frequency domain；

Fig. 3 for the present invention provide on FBMC-OQAM system time frequency physical resources, the pilot signal distribution schematic diagram of 2 transmitting antennas；

Fig. 4 for the present invention provide on FBMC-OQAM system time frequency physical resources, the pilot signal distribution schematic diagram of 2 transmitting antennas；

The flow chart of the transmission method of pilot signal in a kind of multicarrier system that Fig. 5 is provided for the present invention；

The structure chart of the transmitting device of pilot signal in a kind of multicarrier system that Fig. 6 is provided for the present invention.

Specific embodiment

To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings and the specific embodiments the present invention is described in further detail.It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can mutually be combined.

As background technology is mentioned, compared with ofdm system, FBMC-OQAM system channels are estimated to be certain error, therefore the transmission of pilot signal is extremely important.Pilot signal is otherwise referred to as reference signal, otherwise referred to as known signal.

As ofdm system, the physical resource of FBMC-OQAM systems is also to be made up of the symbol on the subcarrier and time domain on frequency domain.In an ofdm system, it is assumed that subcarrier spacing is Fo, significant character length is To, and has To=1/Fo.But in FBMC-OQAM systems, it is assumed that subcarrier spacing is F, and mark space is T, and has 2T=1/F.Therefore when ofdm system is identical with the subcarrier spacing of FBMC-OQAM systems, the mark space of FBMC-OQAM systems is equal to the significant character length of half ofdm system.

Since the physical resource of FBMC-OQAM systems is also to consist of a plurality of sub-carriers on frequency domain, therefore FBMC-OQAM systems are also a kind of multicarrier system.The multicarrier system that the present invention refers to includes but is not limited to the physical resource that the physical resource of the system is system consist of a plurality of sub-carriers or described on frequency domain and is made up of multiple carrier waves on frequency domain.The transmitting terminal of multicarrier system includes：These transmitting equipment are referred to as transmitting node by the various transmitting equipment in base station, terminal, relaying (relay), launch point (transmitting point) etc., this patent.

In order to overcome the pilot signal overhead of FBMC-OQAM present in prior art than larger, and the also bad problem of channel estimating performance and defect, there is provided a kind of pilot signal approach of FBMC-OQAM.The present invention is employed the following technical solutions：

The transmission method of pilot signal in a kind of multicarrier system, including：

Continuous three symbols of time domain on subcarrier m upload defeated pilot data element, wherein the pilot data element is：X (m, n-1), X (m, n) with X (m, n+1), wherein m is subcarrier sequence number, and n is symbol sequence number, X (m, n-1) (i.e. X (m, n-1) is than X (m with the phase pi/2 of X (m, n), n) the big pi/2 of phase place or little-pi/2), phase pi/2 (i.e. X (the m of X (m, n+1) and X (m, n), n+1) than X (m, n) the big pi/2 of phase place or little-pi/2), and meet X (m, n-1) and X (m, n+1) phase by pi, and the mould of X (m, n-1) and X (m, n+1) is equal.

The pilot data element can be plural number, real number or pure imaginary number.Wherein X (m) is real number or pure imaginary number.Preferably, X (m, n) is pure imaginary number.

It can be the interference of symbol data before isolating (m, n-1) after symbol and (m, n+1) to pilot signal to be also provided with the benefit of pilot signal in the previous symbol and latter symbol of pilot positions (m, n)；The benefit of the phase pi/2 of X (m, n-1) and X (m, n) can be the signal to noise ratio for increasing pilot signal joint demodulation in the same direction；In the same manner, the benefit of the phase pi/2 of X (m, n+1) and X (m, n) can be the signal to noise ratio for increasing pilot signal joint demodulation in the same direction；X (m, n-1) with X (m, n+1) the equal benefit of phase by pi and mould is, both sides pilot signal can in the same direction increase the signal to noise ratio of the detection of intermediate symbols pilot point combined signal on same subcarrier, and both sides pilot signal can cancel out each other for the interference of intermediate symbols pilot signal on adjacent sub-carrier.When X (m, n) is preferably pure imaginary number, X (m, n-1) and X (m, n+1) is just real number, can so avoid pilot signal from interfering ambient data signal.The present invention does not use extra null symbol to carry out interference of the mask data to pilot tone equivalent to three frequency pilot sign sides, therefore the present invention can save the resource for separating interference, so as to save pilot-frequency expense.And due to pilot signal joint demodulation and the counteracting of interference, therefore the channel estimating performance of receiving terminal can be improved.Although present invention uses 3 symbols, the mark space of FBMC-OQAM systems is equal to the significant character length of half ofdm system.Therefore the expense of 3 symbols is simultaneously little.

Continuous pilot signal can be dispersedly distributed in the time/frequency source block of FBMC-OQAM systems in this 3 time domains, it is also possible to be distributed on continuous 3 symbols that some are fixed.

When being distributed on continuous 3 symbols fixed at some, the pilot signal be able to can also be spaced apart on frequency domain with continuous distributed.

Further, the subcarrier m is the equally spaced subcarrier series on frequency domain.That is, described m=A*k+a, wherein A are a positive integer；A is a nonnegative integer, and a is less than A；K is the integer sequence of certain length.

Pilot signal continuous distributed schematic diagram on frequency domain on FBMC-OQAM system time frequency physical resources that Fig. 1 is provided for the present invention.In schematic diagram shown in Fig. 1, abscissa is the time, and each lattice length is each FBMC-OQAM symbol lengths or interval；Ordinate is frequency, and each lattice length is each subcarrier width or interval.In time domain, from left to right, first three symbol is frequency pilot sign, it is assumed that the numbering of this 3 symbols is：Symbol 1, symbol 2, symbol 3.On frequency domain, from the bottom up, it is assumed that subcarrier n numberings are followed successively by：0th, 1,2......N, it is assumed that the subcarrier m numberings of transmission pilot signal are followed successively by：0th, 1,2......M, M<=N, that is to say, that the subcarrier sequence of transmission pilot signal can take whole transmission bandwidth, it is also possible to take fractional transmission bandwidth.It is the example of M=11 in Fig. 1.If being represented using formula m=A*k+a, A=1 in that formula, a=0, k=0,1 ... 11.Therefore the pilot signal of the running time-frequency resource transmission of negative line part is in Fig. 1：X (m, 1), X (m, 2), X (m, 3), wherein, m be subcarrier sequence number, m=0,1,2 ..., 11.The running time-frequency resource of non-negative line part transmits other data in Fig. 1.Table 1 is the signal list of the pilot signal transmitted in Fig. 1.List on same carrier wave pilot data on continuous 3 symbols in table 1, and list on different carrier waves pilot data on continuous 3 symbols.It is specific as follows：

Subcarrier number n	Symbol 1	Symbol 2	Symbol 3
				11	-1	j	1
10	-1	j	1
				9	1	-j	-1
8	1	-j	-1
				7	-1	j	1
6	-1	j	1
				5	1	-j	-1
4	1	-j	-1
				3	-1	j	1
2	-1	j	1
				1	1	-j	-1
0	1	-j	-1

Table 1

In table 1, X (m, 2)=j or-j, are pure imaginary numbers, X (m, 1)=1 or -1, X (m, 3)=- 1 or 1, m=0,1 ..., 11.(the m, 1) with X (m, phase pi/2 2), X (m, 3) with X (m, phase pi/2 2) as can be seen that X.The mould and X (m, n+1) of X (m, n-1) and X (m, n) is equal with the mould of X (m, n).

Fig. 2 for the present invention provide on FBMC-OQAM system time frequency physical resources, pilot signal is spaced apart schematic diagram on frequency domain.In schematic diagram shown in Fig. 2, in time domain, from left to right, first three symbol is frequency pilot sign, and the numbering of wherein this 3 symbols is：Symbol 1, symbol 2, symbol 3.On frequency domain, from the bottom up, it is assumed that subcarrier n numberings are followed successively by：0th, 1,2......N, the subcarrier m numberings for transmitting pilot signal are followed successively by：0th, 2,4......M, M<=N.It is the example of M=12 in Fig. 2.If being represented using formula m=A*k+a, A=2 in that formula, a=0, k=0,1 ... 6.Therefore the pilot signal of the running time-frequency resource transmission of negative line part is in Fig. 2：X (m, 1), X (m, 2), X (m, 3), wherein, m be subcarrier sequence number, m=0,2 ..., 12.The running time-frequency resource of non-negative line part transmits other data in Fig. 2.Table 1 is the signal list of the pilot signal transmitted in Fig. 1.List on same carrier wave pilot data on continuous 3 symbols in table 1, and list on different carrier waves pilot data on continuous 3 symbols.It is specific as follows：

Subcarrier number n	Symbol 1	Symbol 2	Symbol 3
				12	1	-j	-1
11
				10	-1	j	1
9
				8	1	-j	-1
7
				6	-1	j	1
5
				4	1	-j	-1

3
	2	-1	j	1
1
	0	1	-j	-1

Table 2

In table 2, X (m, 2)=j or-j, are pure imaginary numbers, X (m, 1)=1 or -1, X (m, 3)=- 1 or 1, m=0,2,4 ..., 12.(the m, 1) with X (m, phase pi/2 2), X (m, 3) with X (m, phase pi/2 2) as can be seen that X.In this example, X (m, n-1) and X (m, n+1) are equal with the mould between X (m, n) respectively.

Above the pilot signal approach of design can be used on 1 transmitting antenna, it is also possible on many transmitting antennas (i.e. every antenna all adopts this pilot signal design mode).

When many transmitting antennas, we can also further adopt following preferred version.

Assume transmitting terminal transmitting antenna number (or antenna port number) (for convenience, transmitting antenna number and antenna port number are collectively referred to as transmitting antenna number by this patent) it is T, T is the positive integer more than 1, then there is one group of antenna, the group includes P root antennas, and P is the positive integer more than 1 and less than or equal to T.In described group of P root antennas, the pilot data element X (mp1 are transmitted on arbitrarily certain root transmitting antenna p1, n-1), X (mp1, n), the data element on corresponding described group of interior other all transmitting antennas of the physical time-frequency resource of X (mp1, n+1) on identical physical time-frequency resource is set to：0、0、0.Wherein p1 is described certain root antenna serial number；Mp1 is the subcarrier sequence number that the pilot data element is transmitted on antenna p1.The data element is represented for 0 and do not launch data on the running time-frequency resource, in other words without signal power on the running time-frequency resource.It can be to reduce the interference of pilot signal on antenna p1 described in other antenna pairs that data element is set to 0 benefit in corresponding resource on other antennas.

Or, more preferably, in described group of P root antennas, the pilot data element X (mp1 are transmitted on arbitrarily certain root transmitting antenna p1, n-1), X (mp1, n), the data element on corresponding described group of interior other all transmitting antennas of the physical time-frequency resource of X (mp1, n+1) on identical physical time-frequency resource is set to：Z (mp1, n-1), 0, Z (mp1, n+1), and meet that the mould of Z (mp1, n-1) and Z (mp1, n+1) is equal and phase by pi.Wherein p1 is described certain root antenna serial number；Mp1 is the subcarrier sequence number that the pilot data element is transmitted on antenna p1.The data element is represented for 0 and do not launch data on the running time-frequency resource, in other words without signal power on the running time-frequency resource.Due to being receiving terminal given data, therefore, the data element 0 is referred to as being a kind of pilot data element.When the data element：When Z (mp1, n-1) or Z (mp1, n+1) is receiving terminal given data, it is also possible to be known as a kind of pilot data element.

In corresponding resource on other antennas by data element be set to Z (mp1, n-1), 0, the benefit of Z (mp1, n+1) be：(1) interference of pilot signal on antenna p1 described in other antenna pairs can be reduced；(2) interference of the data around other antennas in resource to pilot signal on the antenna p1 can also be offset.Z (mp1, n-1) with Z (mp1, n+1 mould) is equal and benefit of phase by pi is can not only to offset the interference of pilot signal on antenna p1 described in other antenna pairs, can also offset the interference of pilot signal on other antenna pair its own antennas.Such that it is able to improve the channel estimating performance of receiving terminal, but also extra resource is not needed to separate interference, so as to decrease pilot-frequency expense.

Further, when sending the Z (mp1 on certain root transmitting antenna p2 in described group,) and Z (mp1 n-1, n+1 subcarrier) and transmission pilot tone element X (mp2, n) when subcarrier is adjacent, then Z (mp1, n-1) and Z (mp1, n+1) by including X, (mp2, formula n) is calculated.Wherein p2 is described certain root antenna serial number, and p2 is not equal to p1.

Further, by including X, (mp2, the example that formula n) is calculated is Z (mp1, n-1) and Z (mp1, n+1)：

Wherein

Wherein, " * " be conjugate operation, g_mp1,nFor physical time-frequency resource (mp1, n) on filter function, g_mp1,n-1For the filter function on physical time-frequency resource (mp1, n-1), g_mp1,n+1For the filter function on physical time-frequency resource (mp1, n+1), g_mp2,nFor physical time-frequency resource (mp2, n) on filter function, g_mp2,n-1For the filter function on physical time-frequency resource (mp2, n-1), g_mp2,n+1For the filter function on physical time-frequency resource (mp2, n+1).δ is the interference of other data.

Can see in formula from the example above：

This is that the pilot tone feature of the pilot signal provided according to the present invention draws.

Further, when sending the Z (mp1 on certain root transmitting antenna p2 in described group, n-1) and Z (mp1, n+1) neighbouring two subcarriers of subcarrier all include respectively pilot tone element X (mp1-1, n) and X (mp1+1, when n), then Z (mp1, n-1) and Z (mp1, n+1) are by including X (mp1-1, n) (mp1+1, formula n) is calculated with X.One specific example is：

Can see in formula from the example above：

With

This is that the pilot tone feature of the pilot channel provided according to the present invention draws.In this example, Z (mp1, n-1) and Z (mp1, n+1) can (mp1-1, n) (mp1+1, n) calculates, therefore can be data known to receiving terminal with X by pilot tone element X.

Further, when sending the Z (mp1 on certain root transmitting antenna p2 in described group,) and Z (mp1 n-1, n+1 subcarrier) and transmission pilot tone element X (mp2, n) when subcarrier is non-conterminous, then Z (mp1,) and Z (mp1 n-1, n+1) by include the running time-frequency resource on transmitting antenna p2 for (mp1-1, n-1), (mp1-1, n), (mp1-1, n+1), (mp1+1, n-1), (mp1+1, data n), on (mp1+1, n+1) are calculated.Wherein p2 is certain root antenna serial number, and p2 is not equal to p1.

Further, Z (mp1,) and Z (mp1 n-1, n+1) by the running time-frequency resource on transmitting antenna p2 be (mp1-1, n-1), (mp1-1, n), (mp1-1, n+1), (mp1+1, n-1), (mp1+1, the example that data n), on (mp1+1, n+1) are calculated is：

Wherein, D (mp1-1, n-1), D (mp1-1, n), D (mp1-1, n+1), D (mp1+1, n-1), D (mp1+1, n), D (mp1+1, n+1) is respectively the data on corresponding running time-frequency resource

Further, the symbol that the pilot signal of any antenna transmission is taken in the time domain in described group with described group in other all antenna transmissions the symbol that takes in time domain of the pilot signal it is identical, the subcarrier mp spaced distributions on frequency domain, that is mp=A*k+ap, wherein, p is per antenna serial number in group, A is the positive integer more than or equal to P, ap is the corresponding nonnegative integer less than A of pth root antenna, and the ap values of different antennae are different, and k is the integer sequence of certain length.

Further, it is assumed that transmitting terminal transmitting antenna number (or antenna port number) be P*Q, wherein, P and Q be positive integer, P be more than 1.Transmitting antenna can so be regarded as Q groups, every group of P root antenna.Per in group, the symbol that the pilot signal of any antenna transmission is taken in the time domain with described group in other all antenna transmissions the symbol that takes in time domain of the pilot signal it is identical, the subcarrier mp spaced distributions on frequency domain, that is mp=A*k+ap, wherein, p is per antenna serial number in group, A is the positive integer more than or equal to P, ap is the corresponding nonnegative integer less than A of pth root antenna, and the ap values of different antennae are different, and k is the integer sequence of certain length.

Further, the antenna of different groups uses three incomplete same continuous symbols.

For multi-antenna transmission node, the present invention are suitable for including the pilot signal of many antennas on three symbols of identical, compare reduces pilot-frequency expense with prior art.

In addition, in the case where transmitting node is for the scene of multiple antennas, from the angle individually taken between each antenna of counteracting to the interference of pilot signal on each antenna, employing the following technical solutions：

A kind of transmission method of the pilot signal of the multi-antenna transmission node of multicarrier system, including：

When transmitting terminal transmitting antenna number (or antenna port number) is T, there is one group of antenna, the group includes P root antennas, wherein, T is the positive integer more than 1, and P is the positive integer more than 1 and less than or equal to T.In described group of P root antennas, upper certain the transmission pilot signal of arbitrarily certain root transmitting antenna p1 physical time-frequency resource (mp1, n) on corresponding described group interior other all transmitting antennas same sub-carrier with the physical time-frequency resource character position centered on continuous three symbols on data element be set to：Z (mp1, n-1), 0, Z (mp1, n+1), and meet that the mould of Z (mp1, n-1) and Z (mp1, n+1) is equal and phase by pi.Wherein p1 is described certain root antenna serial number；Mp1 is the subcarrier sequence number that the pilot data element is transmitted on antenna p1.N is the symbol sequence number of transmission certain pilot signal on antenna p1.As above telling about, in corresponding resource on other antennas by data element be set to Z (mp1, n-1), 0, the benefit of Z (mp1, n+1) be：(1) interference of pilot signal on antenna p1 described in other antenna pairs can be reduced；(2) interference of the data around other antennas in resource to pilot signal on the antenna p1 can also be offset.Z (mp1, n-1) with Z (mp1, n+1 mould) is equal and benefit of phase by pi is can not only to offset the interference of pilot signal on antenna p1 described in other antenna pairs, can also offset the interference of pilot signal on other antenna pair its own antennas.Such that it is able to improve the channel estimating performance of receiving terminal.

Further, when sending the Z (mp1 on certain root transmitting antenna p2 in described group,) and Z (mp1 n-1, n+1 subcarrier) and transmission pilot tone element X (mp2, n) when subcarrier is non-conterminous, then Z (mp1,) and Z (mp1 n-1, n+1) by include the running time-frequency resource on transmitting antenna p2 for (mp1-1, n-1), (mp1-1, n), (mp1-1, n+1), (mp1+1, n-1), (mp1+1, data n), on (mp1+1, n+1) are calculated.Wherein p2 is described certain root antenna serial number, and p2 is not equal to p1.

Further, in described group in P roots antenna, the symbol that the pilot signal of any antenna transmission is taken in the time domain with described group in other all antenna transmissions the symbol that takes in time domain of the pilot signal it is identical, the subcarrier mp spaced distribution, i.e. mp=A*k+ap on frequency domain, wherein, p is that, per antenna serial number in group, A is the positive integer more than or equal to P, and ap is the corresponding nonnegative integer less than A of pth root antenna, the ap values of different antennae are different, and k is the integer sequence of certain length.

Below we are illustrated with 2 transmitting antennas as specific embodiment, that is, assume that transmitting terminal transmitting antenna number (or antenna port number) is T=2, and described group includes this 2 (P=2) root antenna.Our preferred version is designed as：The subcarrier m1 of the carrying pilot signal transmitted on antenna 1 is spaced continuous distributed with the subcarrier m2 of the carrying pilot signal of transmission on antenna 2 on frequency domain, that is, m1=2*k+a, m2=2*k+a+1, wherein a=0 or the integer sequence that 1, k are certain length.

Further, we can be designed as：Antenna 1 uploads the data element transmitted on identical three symbols of same sub-carrier in the subcarrier m1 respective antennas 2 of pilot signal described in transmission bearing：0、0、0.Antenna 2 uploads the data element transmitted on identical three symbols of same sub-carrier in the subcarrier m2 respective antennas 1 of pilot signal described in transmission bearing：0、0、0.

Fig. 3 is that on FBMC-OQAM system time frequency physical resources, 2 transmitting antenna pilot signals are distributed an example of scene.In Fig. 3 (a) and (b), in time domain, from left to right, first three symbol is frequency pilot sign, it is assumed that the numbering of this 3 symbols is：Symbol 1, symbol 2, symbol 3.On frequency domain, from the bottom up, it is assumed that subcarrier n numberings are followed successively by：0、1、2......N.In Fig. 3 (a), antenna 1 uploads the subcarrier m1 series of pilot signal described in transmission bearing and is：0th, 2 ..., the dash area in 12, i.e. figure；In Fig. 3 (b), antenna 2 uploads the subcarrier m2 series of pilot signal described in transmission bearing and is：1st, 3 ..., the dash area in 13, i.e. figure；Fig. 3 (a) and (b) can use the pilot data element of example in table 2, it is also possible to using other pilot data elements.In Fig. 3 (a), the respective antenna 2 on antenna 1 uploads the signal data of the identical physical time-frequency resource of pilot signal described in transmission bearing and is：0th, subcarrier m2 on 0,0, i.e. antenna 1 (i.e. 1,3 ..., 13) in series with antenna 2 on transmit the signal data that transmits on three symbols of the pilot signal identical and be：0、0、0.In Fig. 3 (b), the respective antenna 1 on antenna 2 uploads the signal data of the identical physical time-frequency resource of pilot signal described in transmission bearing and is：0th, subcarrier m1 on 0,0, i.e. antenna 2 (i.e. 0,2 ..., 12) in series with antenna 1 on transmit the signal data that transmits on three symbols of the pilot signal identical and be：0、0、0.Non-shadow blank parts transmit other data in figure.

Further, we can be preferably designed to：Antenna 1 uploads the signal data transmitted on identical three symbols of same sub-carrier in the subcarrier m1 respective antennas 2 of pilot signal described in transmission bearing：Z(m1,n-1)、0、Z(m1,n+1).Antenna 2 uploads the signal data transmitted on identical three symbols of same sub-carrier in the subcarrier m2 respective antennas 1 of pilot signal described in transmission bearing：Z(m2,n-1)、0、Z(m2,n+1).

Fig. 4 is also that on FBMC-OQAM system time frequency physical resources, 2 transmitting antenna pilot signals are distributed an example of scene.In Fig. 4 (a) and (b), in time domain, from left to right, first three symbol is frequency pilot sign, it is assumed that the numbering of this 3 symbols is：Symbol 1, symbol 2, symbol 3.On frequency domain, from the bottom up, it is assumed that subcarrier n numberings are followed successively by：0、1、2......N.In Fig. 4 (a), antenna 1 uploads the subcarrier m1 series of pilot signal described in transmission bearing and is：0th, 2 ..., in 12, Fig. 4 (b), antenna 2 uploads the subcarrier m2 series of pilot signal described in transmission bearing and is：1st, 3 ..., 13, i.e. dash area respectively in figure.Fig. 4 (a) and (b) can use the pilot data element of example in table 2, it is also possible to using other pilot data elements.In Fig. 4 (a), the respective antenna 2 on antenna 1 uploads the signal data of the identical physical time-frequency resource of pilot signal described in transmission bearing and is：Z (m2,1), 0, Z (m2,3), i.e., subcarrier m2 on antenna 1 (i.e. 1,3 ..., 13) in series with antenna 2 on transmit the signal data that transmits on three symbols of the pilot signal identical and be：Z(m2,1)、0、Z(m2,3).Conceptual design of the invention, Z (m2,1)=- Z (and m2,3), therefore in Fig. 4 (a), used Zm2 and-Zm2 replace Z (m2,1) and Z (m2,3).In Fig. 4 (b), the respective antenna 1 on antenna 2 uploads the signal data of the identical physical time-frequency resource of pilot signal described in transmission bearing and is：Z (m1,1), 0, Z (m1,3), i.e., subcarrier m1 on antenna 2 (i.e. 0,2 ..., 12) in series with antenna 1 on transmit the signal data that transmits on three symbols of the pilot signal identical and be：Z(m1,1)、0、Z(m1,3).In Fig. 4 (b), used Zm1 and-Zm1 replace Z (m1,1) and Z (m1,3).Non-shadow blank parts transmit other data in figure.

In Fig. 4 examples, the Zm2 on the antenna 1 is by including X (m2-1,2) with X (m2+1,2) formula is calculated, by including X, (m1-1,2) (m1+1, formula 2) is calculated Zm1 on the antenna 2 with X.That is, in Fig. 4 (a), Z1, Z3 in the resource of symbol 1 ..., Z13 is respectively by the X (0 on pilot resources, 2) and X (2,2), X (2,2) and X (4,2) ..., X (12,2) calculate；In Fig. 4 (b), Z0, Z2 in the resource of symbol 2 ..., Z12 respectively by X on pilot resources (1,2), X (1,2) with X (3,2) ..., X (11,2) and X (13,2) calculate.One specific calculating Z1 formula example is as follows：

Receiving terminal includes base station, terminal, relaying (relay) etc. various receiving devices, and these receiving devices are referred to as receiving node by this patent.Receiving node receives the pilot data is used for channel estimation, and then demodulating data or determination channel condition information.Compared with prior art, the pilot schemes of this patent design can make receiving node improve channel estimating performance.

The flow chart of the transmission method of pilot signal in a kind of multicarrier system that Fig. 5 is provided for the present invention.Method includes shown in Fig. 5：

Step 501, receiving node receive the pilot data transmitted on continuous three symbols of time domain on same subcarrier m, wherein the pilot data is method as described above sending；

Step 502, the receiving node carry out channel estimating operation using the pilot data.

In the transmitting terminal of FBMC-OQAM systems, pilot data (or pilot data element) of the present invention is also needed to through adding phase factor operation, IFFT (Inverse Fast Fourier Transform are carried out again, inverse fast Fourier transform) operate and multiphase filtering operation, then through the process of analog-to-digital conversion and radio-frequency head, launch finally by antenna.

The pilot schemes of Patent design can also be used in other FBMC systems except using in FBMC-OQAM systems, or more extensively a bit, can also be used in other multicarrier systems.In other FBMC systems, such as GFDM (Generalized Frequency Division Multiplexing, broad sense Frequency Division Multiplexing system), it is also desirable to solve pilot signal design.Because the symbol lengths of GFDM systems are usually 2 times of FBMC-OQAM symbol lengths, therefore the transmission pilot signal is：X (m, n-1), X (m, n), the half symbols length that three mark spaces of X (m, n+1) are GFDM.Namely respectively insert a frequency pilot sign in the position of the both sides half symbols length of a frequency pilot sign n of GFDM.The other guide of the program is identical with FBMC-OQAM.

The pilot design of the present invention can not only improve the signal to noise ratio of pilot point combined signal detection, and can offset the interference on adjacent sub-carrier and the interference between each antenna, but also can save separate interference physical time-frequency resource, thus, the channel estimating performance of FBMC systems or other systems with time-frequency as physical resource can be well improved using the present invention, and pilot-frequency expense is relatively small.

The present invention provides a kind of transmitting device of pilot signal in multicarrier system, including：

Wherein, X (m, n) is pure imaginary number.

The present invention also provides a kind of transmitting device of pilot signal in multicarrier system, including：

The structure chart of the transmitting device of pilot signal in a kind of multicarrier system that Fig. 6 is provided for the present invention, Fig. 6 shown devices include：

Receiver module 601, for receiving the pilot data transmitted on continuous three symbols of time domain on same subcarrier m, wherein the pilot data is device as described above sending；

Processing module 602, for carrying out channel estimating operation using the pilot data.

One of ordinary skill in the art will appreciate that all or part of step of above-described embodiment can be realized using computer program flow process, the computer program can be stored in a computer-readable recording medium, the computer program (such as system, unit, device) on corresponding hardware platform is performed, one or a combination set of upon execution, including the step of embodiment of the method.

Alternatively, all or part of step of above-described embodiment can also realize that these steps can be respectively fabricated to integrated circuit modules one by one, or the multiple modules or step in them are fabricated to single integrated circuit module to realize using integrated circuit.So, the present invention is not restricted to any specific hardware and software combination.

Each device/functional module/functional unit in above-described embodiment can realize that they can be concentrated on single computing device using general computing device, it is also possible to be distributed on the network that multiple computing devices are constituted.

Each device/functional module/functional unit in above-described embodiment is realized and as independent production marketing or when using using in the form of software function module, in being stored in a computer read/write memory medium.Computer read/write memory medium mentioned above can be read-only storage, disk or CD etc..

The above; specific embodiment only of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art the invention discloses technical scope in; change or replacement can be readily occurred in, all should be included within the scope of the present invention.Therefore, protection scope of the present invention should be defined by the protection domain described in claim.

Claims

1. in a kind of multicarrier system pilot signal transmission method, it is characterised in that methods described includes：

M is subcarrier sequence number, and n is the phase pi/2 of symbol sequence number, X (m, n-1) and X (m, n), The phase pi/2 of X (m, n+1) and X (m, n), and meet X (m, n-1) and X (m, n+1) phase by pi, And the mould of X (m, n-1) and X (m, n+1) is equal.

2. method according to claim 1, it is characterised in that the mould of X (m, n-1) and X (m, n) And the mould of X (m, n+1) and X (m, n) is equal or unequal.

3. method according to claim 1, it is characterised in that X (m, n) is pure imaginary number.

4. method according to claim 1, it is characterised in that the subcarrier m is in frequency domain Upper equally spaced subcarrier series, wherein, the m=A*k+a, wherein A are positive integer；A is non-negative Integer, and a is less than A；K is integer sequence.

5. method according to claim 1, it is characterised in that：

When transmitting terminal transmitting antenna number is T, one group of antenna includes P root antennas, wherein, T is big In 1 positive integer, P is the positive integer more than 1 and less than or equal to T；

In described group of P root antennas, the pilot data unit is transmitted on arbitrarily certain root transmitting antenna p1 Plain X (mp1, n-1), X (mp1, n), the physical time-frequency resource of X (mp1, n+1) it is corresponding described group in other Data element on all transmitting antennas on identical physical time-frequency resource is set to：0th, 0,0, wherein p1 For described certain root antenna serial number；Mp1 is the subcarrier sequence that the pilot data element is transmitted on antenna p1 Number.

6. method according to claim 1, it is characterised in that：

In described group of P root antennas, the pilot data unit is transmitted on arbitrarily certain root transmitting antenna p1 Plain X (mp1, n-1), X (mp1, n), the physical time-frequency resource of X (mp1, n+1) it is corresponding described group in other Data element on all transmitting antennas on identical physical time-frequency resource is set to：Z(mp1,n-1)、0、 Z (mp1, n+1), and meet that the mould of Z (mp1, n-1) and Z (mp1, n+1) is equal and phase by pi；Wherein P1 is described certain root antenna serial number；Mp1 is the subcarrier that the pilot data element is transmitted on antenna p1 Sequence number.

7. method according to claim 6, it is characterised in that when certain root transmitting antenna in described group Send on p2 the subcarrier of the Z (mp1, n-1) and Z (mp1, n+1) with send pilot tone element X (mp2, n) Subcarrier it is adjacent when, then Z (mp1, n-1) and Z (mp1, n+1) is by including X (mp2, formula n) It is calculated, wherein p2 is described certain root antenna serial number, p2 is not equal to p1.

8. method according to claim 6, it is characterised in that when certain root transmitting day in described group Send on line p2 the subcarrier of the Z (mp1, n-1) and Z (mp1, n+1) with send pilot tone element X (mp2, n) Subcarrier it is non-conterminous when, then Z (mp1, n-1) and Z (mp1, n+1) are by including on transmitting antenna p2 Running time-frequency resource be (mp1-1, n-1), (mp1-1, n), (mp1-1, n+1), (mp1+1, n-1), (mp1+1, data n), on (mp1+1, n+1) are calculated, and wherein p2 is described certain root antenna Sequence number, p2 is not equal to p1.

9. method according to claim 1, it is characterised in that any antenna transmission in described group The symbol that the pilot signal is taken in the time domain with described group in other all antenna transmissions the pilot tone The symbol that signal takes in time domain is identical, the subcarrier mp spaced distributions on frequency domain, its Middle mp=A*k+ap, wherein, p is that, per antenna serial number in group, A is the positive integer more than or equal to P, ap For the corresponding nonnegative integer less than A of pth root antenna, the ap values difference of different antennae, k is integer sequence Row.

10. method according to claim 9, it is characterised in that：

When transmitting terminal transmitting antenna number is P*Q, transmitting antenna has Q groups, every group of P root antenna； In every group of antenna, the symbol that the pilot signal of any antenna transmission is taken in the time domain with described group in The symbol that the pilot signal of other all antenna transmissions takes in time domain is identical, the subcarrier Mp spaced distribution, i.e. mp=A*k+ap on frequency domain, wherein, P and Q is positive integer, and P is big Antenna serial number in being per group in 1, p, A is the positive integer more than or equal to P, and ap is pth root antenna pair The nonnegative integer less than A answered, the ap values of different antennae are different, and k is the integer sequence of certain length.

11. methods according to claim 9, it is characterised in that the antenna of difference group makes to cannot be used up Three exactly the same continuous symbols.

The transmission method of pilot signal in a kind of 12. multicarrier systems, it is characterised in that methods described bag Include：

When transmitting terminal transmitting antenna number is T, one group of antenna includes P root antennas, in described group of P In root antenna, defeated pilot signal is uploaded in transmitting antenna p1, wherein：

(mp1, n) other own in corresponding described group to transmit the physical time-frequency resource of the pilot signal Same sub-carrier accords with continuous three centered on the physical time-frequency resource character position on transmitting antenna Data element on number is：Z(mp1,n-1)、0、Z(mp1,n+1)；

Wherein, the mould of Z (mp1, n-1) and Z (mp1, n+1) is equal and phase by pi, wherein, T be more than 1 positive integer, P is the positive integer more than 1 and less than or equal to T；P1 is described certain root antenna serial number； Mp1 is the subcarrier sequence number that the pilot data element is transmitted on antenna p1, and n is to transmit on antenna p1 The symbol sequence number of certain pilot signal.

13. methods according to claim 12, it is characterised in that when certain root transmitting day in described group Send on line p2 the subcarrier of the Z (mp1, n-1) and Z (mp1, n+1) with send pilot tone element X (mp2, n) Subcarrier it is adjacent when, then Z (mp1, n-1) and Z (mp1, n+1) is by including X (mp2, formula meter n) Obtain, wherein p2 is described certain root antenna serial number, p2 is not equal to p1.

14. methods according to claim 12, it is characterised in that when certain root transmitting day in described group Send on line p2 the subcarrier of the Z (mp1, n-1) and Z (mp1, n+1) with send pilot tone element X (mp2, n) Subcarrier it is non-conterminous when, then Z (mp1, n-1) and Z (mp1, n+1) are by including on transmitting antenna p2 Running time-frequency resource be (mp1-1, n-1), (mp1-1, n), (mp1-1, n+1), (mp1+1, n-1), (mp1+1, data n), on (mp1+1, n+1) are calculated, and wherein p2 is described certain root antenna Sequence number, p2 is not equal to p1.

15. methods according to claim 12, it is characterised in that in described group in P roots antenna, The symbol that the pilot signal of any antenna transmission is taken in the time domain with described group in other all antennas The symbol that the pilot signal of transmission takes in time domain is identical, subcarrier mp phases on frequency domain Mutually it is spaced apart, i.e. mp=A*k+ap, wherein, p is that, per antenna serial number in group, A is more than or equal to P Positive integer, ap be the corresponding nonnegative integer less than A of pth root antenna, the ap values of different antennae are not Together, k is integer sequence.

The transmission method of pilot signal in a kind of 16. multicarrier systems, it is characterised in that methods described bag Include：

Receiving node receives the pilot number transmitted on continuous three symbols of time domain on same subcarrier m According to, wherein the pilot data is sent according to the method as described in claim 1 to 11 is arbitrary, or Person, is sent according to the method as described in right 12 to 15 is arbitrary；

The transmitting device of pilot signal in a kind of 17. multicarrier systems, it is characterised in that described device bag Include：

First transport module, for continuous three symbols of time domain on same subcarrier m transporting frequency is uploaded Data, wherein the pilot data is：X(m,n-1)、X(m,n)、X(m,n+1)；Wherein：

18. devices according to claim 17, it is characterised in that X (m, n-1) and X's (m, n) The mould of mould and X (m, n+1) and X (m, n) is equal or unequal.

19. devices according to claim 17, it is characterised in that X (m, n) is pure imaginary number.

20. devices according to claim 17, it is characterised in that the subcarrier m is in frequency Equally spaced subcarrier series on domain, wherein, the m=A*k+a, wherein A are positive integer；A is non- Negative integer, and a is less than A；K is integer sequence.

21. devices according to claim 17, it is characterised in that：

22. devices according to claim 17, it is characterised in that：

23. devices according to claim 22, it is characterised in that when certain root transmitting day in described group Send on line p2 the subcarrier of the Z (mp1, n-1) and Z (mp1, n+1) with send pilot tone element X (mp2, n) Subcarrier it is adjacent when, then Z (mp1, n-1) and Z (mp1, n+1) is by including X (mp2, formula n) It is calculated, wherein p2 is described certain root antenna serial number, p2 is not equal to p1.

24. devices according to claim 22, it is characterised in that when certain root transmitting in described group The subcarrier of the Z (mp1, n-1) and Z (mp1, n+1) is sent on antenna p2 and pilot tone element is sent (mp2, when subcarrier n) is non-conterminous, then Z (mp1, n-1) and Z (mp1, n+1) are by including transmitting day for X Running time-frequency resource on line p2 be (mp1-1, n-1), (mp1-1, n), (mp1-1, n+1), (mp1+1, n-1), (mp1+1, data n), on (mp1+1, n+1) are calculated, wherein p2 For described certain root antenna serial number, p2 is not equal to p1.

25. devices according to claim 17, it is characterised in that any antenna transmission in described group The symbol that takes in the time domain of the pilot signal with described group in lead described in other all antenna transmissions The symbol that frequency signal takes in time domain is identical, the subcarrier mp spaced distributions on frequency domain, Wherein mp=A*k+ap, wherein, p is that, per antenna serial number in group, A is the positive integer more than or equal to P, Ap is the corresponding nonnegative integer less than A of pth root antenna, and the ap values of different antennae are different, and k is whole Number Sequence.

26. devices according to claim 25, it is characterised in that：

27. devices according to claim 25, it is characterised in that the antenna of difference group makes to cannot be used up Three exactly the same continuous symbols.

The transmitting device of pilot signal in a kind of 28. multicarrier systems, it is characterised in that described device bag Include：

Second transport module, for when transmitting terminal transmitting antenna number is T, one group of antenna to include P roots Antenna, in described group of P root antennas, in transmitting antenna p1 defeated pilot signal is uploaded, wherein：

29. devices according to claim 28, it is characterised in that when certain root transmitting day in described group Send on line p2 the subcarrier of the Z (mp1, n-1) and Z (mp1, n+1) with send pilot tone element X (mp2, n) Subcarrier it is adjacent when, then Z (mp1, n-1) and Z (mp1, n+1) is by including X (mp2, formula meter n) Obtain, wherein p2 is described certain root antenna serial number, p2 is not equal to p1.

30. devices according to claim 28, it is characterised in that when certain root transmitting day in described group Send on line p2 the subcarrier of the Z (mp1, n-1) and Z (mp1, n+1) with send pilot tone element X (mp2, n) Subcarrier it is non-conterminous when, then Z (mp1, n-1) and Z (mp1, n+1) are by including on transmitting antenna p2 Running time-frequency resource be (mp1-1, n-1), (mp1-1, n), (mp1-1, n+1), (mp1+1, n-1), (mp1+1, data n), on (mp1+1, n+1) are calculated, and wherein p2 is described certain root antenna Sequence number, p2 is not equal to p1.

31. devices according to claim 28, it is characterised in that in described group in P roots antenna, The symbol that the pilot signal of any antenna transmission is taken in the time domain with described group in other all antennas The symbol that the pilot signal of transmission takes in time domain is identical, subcarrier mp phases on frequency domain Mutually it is spaced apart, i.e. mp=A*k+ap, wherein, p is that, per antenna serial number in group, A is more than or equal to P Positive integer, ap be the corresponding nonnegative integer less than A of pth root antenna, the ap values of different antennae are not Together, k is integer sequence.

The transmitting device of pilot signal in a kind of 32. multicarrier systems, it is characterised in that described device bag Include：

Receiver module, for leading that reception is transmitted on continuous three symbols of time domain on same subcarrier m Frequency evidence, wherein the pilot data is sent according to the device as described in claim 17 to 27 is arbitrary , or, it is to send according to the device as described in right 28 to 31 is arbitrary；