CN106341362A - Pilot frequency transmission method, pilot frequency receiving method and devices thereof - Google Patents

Abstract

The invention provides a pilot frequency transmission method which is applied to a MIMO-FBMC system. The method comprises the steps that A a time domain orthogonal sequence serving as pilot frequency is generated, and the length of the time domain orthogonal sequence is expanded to be equal to the sub-carrier length of the FBMC system; B the expanded time domain orthogonal sequence is transformed into a frequency domain sequence; and C values at odd-numbered locations of the frequency domain sequence are added to corresponding locations of a pilot frequency area for transmission, wherein steps A to C are carried out on each transmission antenna. The invention further provides a corresponding pilot frequency receiving method, a pilot frequency transmission device and a pilot frequency receiving device. According to the technical scheme provided by the invention, the accuracy of channel estimation of the MIMO-FBMC system can be improved, and the time-frequency resources of the MIMO-FBMC system can be saved.

Description

Pilot sending method, pilot reception method and its device

Technical field

The present invention relates to wireless communication technology field, more specifically, relate to based on filter bank multi-carrier The pilot sending method of wave system system, pilot reception method and device.

Background technology

In existing communication technology, filter bank multi-carrier (fbmc) system is with its higher availability of frequency spectrum, good Time-frequency focus characteristics, become one of major candidate of following mobile multimedia communication.It is discussed in detail and can be found in (le floch,m.alard,and c.berrou,“coded orthogonal frequency division multiplex,” proceedings of the ieee,vol.83,pp.982–996,june 1995.).

The mathematic(al) representation of sending signal s (t) of fbmc system is:

$\begin{array}{c}s\left(t\right)=\underset{n}{\σ}\underset{m=0}{\overset{m-1}{\σ}}{a}_{m,n}g(t-{\mathrm{n\τ}}_0)j^{m+n}{e}^{j2{\mathrm{\πm\υ}}_{0}t}\\ g_{m,n}=g(t-{\mathrm{n\τ}}_0)j^{m+n}{e}^{j2{\mathrm{\πm\υ}}_{0}t}\end{array}---\left(1\right)$

Wherein: a_m,nRepresent data on m-th subcarrier of n-th transmitting symbol, v₀And τ₀Represent fbmc respectively System subcarrier interval and sending signal time interval, g (t) represents forming filter function.

Compared to traditional orthogonal frequency division multiplexi, fbmc system only meets strict orthogonality condition in real number field, As follows:

It is assumed that fbmc signal experienced a multidiameter fading channel, channel pulse shock response is h (t), Gauss White noise is n (t), then, the mathematic(al) representation of fbmc system receipt signal is:

$y\left(t\right)=h\left(t\right)*s\left(t\right)+n\left(t\right)={\&integral;}_0^{\mathrm{\δ}}(t,\mathrm{\τ})s(t-\mathrm{\τ})d\mathrm{\τ}+n\left(t\right)---\left(3\right)$

When receiving terminal receives the sending signal after multidiameter fading channel, it is carried out after matched filtering operation, Receipt signal y (t) is expressed as:

$\begin{array}{c}y\left(t\right)=\mathrm{re}(\underset{n}{\&sigma;}\underset{n^{\&prime;}}{\&sigma;}\underset{m=0}{\overset{m-1}{\&sigma;}}\underset{m^{\&prime;}=0}{\overset{m-1}{\&sigma;}}{a}_{m,n}<g_{m,n}|g_{m^{\&prime;},n^{\&prime;}}>h_m)+n\left(t\right)\\ =h_m{a}_{m,n}+\mathrm{re}(\underset{m^{\&prime;}\&notequal;m,n^{\&prime;}\&notequal;n}{\&sigma;}{a}_{m^{\&prime;},n}<g_{m,n}|g_{m^{\&prime;},n^{\&prime;}}>h_m)+n\left(t\right)\end{array}---\left(4\right)$

Wherein $h_m={\&integral;}_0^{\mathrm{\&delta;}}h\left(\mathrm{\&tau;}\right)e^{j2{\mathrm{\&pi;m\&upsi;}}_0(-\mathrm{\&tau;})}d\mathrm{\&tau;},$ AndRepresent all intersymbol dry Disturb and subcarrier interference.

Work as a_m,nIt is the data of m-th subcarrier of pilot frequency sequence (known array designing specifically for estimating pilot frequency) When, then fbmc system based on the mathematic(al) representation of the channel estimation of pilot frequency sequence is:

$h_m\&ap;\frac{y\left(t\right)}{a_{m,n}+\underset{m\&notequal;m^{\&prime;},n\&notequal;n^{\&prime;}}{\&sigma;}{a}_{m^{\&prime;},n^{\&prime;}}<g_{m,n}|g_{m^{\&prime;},n^{\&prime;}}>}---\left(5\right)$

Mimo (multi-input multi-output, multiple-input and multiple-output) technology also becomes the emphasis of research at present, its In based on vblast (vertical bell labs layered space-time, during vertical bell laboratories layered space tie Structure) the mimo system of technology utilizes joint between multiple transmission antennas and reception antenna, and it is effectively improved and be based on The power system capacity of mimo technology, refers to " v-blast:an architecture for realizing very high data rates Over the rich-scattering wireless channel ", author wolniansky, p.w, foschini, g.j, golden, G.d, valenzuela, r.a, are published in 1998ursi international symposium on systems, and electronics.The current mimo system combining based on vblast technology and the mimo-fbmc of fbmc technology System becomes the major architectural of the more future broadband wireless communication systems of value.

Fig. 1 is transmitting end structure and the signal processing of the mimo-fbmc system based on vblast structure, Comprise the following steps:

Step one: serial data stream input bit modulation module is modulated to serial data stream according to systematic parameter, Such as quadrature amplitude modulation (qam) mode.

Step 2: the data flow after modulation is passed through serioparallel exchange process, then according to the transmitter architecture of vblast The serial data of input is mapped to different transmitting data flows.

Step 3: respectively pilot frequency sequence is added to the data block header after the modulation of each data flow, wherein pilot frequency sequence is used Channel estimation in mimo-fbmc system.

Step 4: phase mapping is orthogonalized to the data added after pilot frequency sequence according to formula (1).

Step 5: the data after step 4 completes ifft conversion by ifft module.

Step 6: the data after step 5 completes molding filtration process by formed filter group module.

Step 7: the different data streams after step 6 are mapped to different transmission antennas, then launch.

Fig. 2 is reception end structure and the signal processing of mimo-fbmc system, comprises the following steps:

Step one: be first according to the demodulation that fbmc Demodulation Systems process completes different data streams, and remove quadrature phase Information.

Step 2: the channel information being obtained using step one, channel is carried out respectively to the receipt signal of different reception antennas Estimate, thus again multi-path jamming pair is eliminated by equalizer after obtaining the channel response between transmission antenna and reception antenna The impact of fbmc system.

Step 3: by the AF panel of the data input vblast system conventional after step 2 and detection module, Data after interference eliminates for the output.

Step 4: qam demodulation is carried out to the data after step 3 in different data streams, after finally output demodulation Data bit information.

For the ofdm system based on plural domain space, cp-ofdm (ofdm with cyclic Prefix, adds the ofdm system of prefix) eliminate intersymbol interference by adding prefix, therefore tradition The channel estimation methods based on hidden sequence of mimo-ofdm system can be by being directly superimposed mutually orthogonal sequence Row (as zcz sequence), as pilot tone, can obtain each antenna in receiving terminal by the related operation with local sequence Between channel information.But for the mimo-fbmc system of real number field orthogonality condition, multipath fading is believed The plural characteristic in road can destroy fbmc system orthogonal property, and the signal that therefore receiving front-end receives there is symbol Between number, interference and inter-sub-carrier interference, need to design a kind of leading for mimo-fbmc real number field orthogonal property Frequency signal sequence and channel estimation methods, to eliminate intersymbol interference and inter-sub-carrier interference.

Content of the invention

This application provides a kind of pilot sending method, pilot reception method and its device, to improve The accuracy that mimo-fbmc system channel is estimated, and save the running time-frequency resource of mimo-fbmc system.

This application discloses a kind of pilot sending method, it is applied to filter bank multi-carrier fbmc system, comprising:

Each transmission antenna is executed respectively with a～c:

A, the time domain orthogonal sequence as pilot tone for the generation, the length of described time domain orthogonal sequence is expanded to equal to described The subcarrier length of fbmc system；

B, by extension after time domain orthogonal sequence be transformed into frequency domain sequence；

C, the value in the odd positions of described frequency domain sequence is added on the correspondence position of pilot regions it is transmitted.

Preferably, described pilot regions disturb for wave filter be zero region.

Preferably, the both sides of described pilot regions are respectively auxiliary pilot data.

Preferably, the value of the odd positions of auxiliary pilot is equal to the value of the corresponding odd positions of described data, auxiliary pilot The value of even number position is equal to the inverse value of the value of the corresponding even number position of described data；

The value of the even number position of pilot regions is 0.

Preferably, described c includes: the value in the odd positions of described frequency domain sequence is added to the odd number of pilot regions It is transmitted on position.

Present invention also provides a kind of pilot tone dispensing device, it is applied to fbmc system, comprising:

Transmitting terminal first module, produces the time domain orthogonal sequence as pilot tone, and the length of described time domain orthogonal sequence is expanded Open up the subcarrier length equal to described fbmc system；

Transmitting terminal second module, the time domain orthogonal sequence after extension is transformed into frequency domain sequence；

Transmitting terminal three module, the value in the odd positions of described frequency domain sequence is added to the odd positions of pilot regions On be transmitted.

Present invention also provides a kind of pilot reception method, the method is for sending to using pilot tone described in claim 1 The pilot tone that method is sent is processed, comprising:

Operate to below each reception antenna execution:

A1, extract the data of pilot regions corresponding to transmitting terminal from receipt signal；

B1, obtain the reception value of frequency domain according to described data；

C1, the reception value of described frequency domain is transformed to time domain, obtain the reception value of time domain；

D1, calculating time domain channel taps response are estimated；

E1, by time domain channel taps response transform to frequency domain, obtain the channel estimation response of frequency domain.

Preferably, described pilot regions disturb for wave filter be zero region.

Preferably, described b1 includes: described data is carried out with the zero padding operation of even number position, obtains the reception value of frequency domain.

Preferably, the both sides of described pilot regions are respectively auxiliary pilot data.

Preferably, the value of the odd positions of auxiliary pilot is equal to the value of the corresponding odd positions of described data, auxiliary pilot The value of even number position is equal to the inverse value of the value of the corresponding even number position of described data；

The value of the even number position of pilot regions is 0.

Preferably, described a1 includes: extract the data being in odd positions in described pilot regions from receipt signal.

Present invention also provides a kind of pilot reception device, it is applied to fbmc system, comprising:

Receiving terminal first module, extracts the data of the pilot regions corresponding to transmitting terminal from receipt signal；

Receiving terminal second module, obtains the reception value of frequency domain according to described data；

Receiving terminal three module, the reception value of described frequency domain is transformed to time domain, obtains the reception value of time domain；

Receiving terminal the 4th module, calculates time domain channel taps response and estimates；

Receiving terminal the 5th module, by time domain channel taps response transform to frequency domain, the channel estimation obtaining frequency domain is rung Should.

As seen from the above technical solution, the application combines the real number field orthogonal property of mimo-fbmc system, carries Go out a kind of sequential structure being applied to the estimation of mimo-fbmc system channel, and corresponding pilot tone sender Method, pilot reception method and device.The pilot tone of this structure includes string conventional pilot and string auxiliary pilot.Its Middle conventional pilot is used for the estimation of channel information, auxiliary pilot is used for one wave filter of construction disturb be zero region.

Firstly for every transmission antenna, one of orthogonal sequence set sequence is selected to pass through the construction side of the application Formula obtains required time domain sequences；This time domain sequences is transformed to frequency domain by Fourier transformation；Again by this frequency domain Sequence is added to this disturb be zero pilot regions on be transmitted as conventional pilot.Because sequence is in time domain There is orthogonality, we can eliminate different antennae pilot tone in receiving terminal by related operation in fbmc system The interference of symbol, thus estimate channel tap response.The channel estimation methods that the application is proposed are due to sequence Special tectonic make it assume purely real characteristic in frequency domain, so it is only necessary that with two row real number resource conducts Pilot tone, and pilot number will not increase with the increase of antenna number, thus saving mimo-fbmc system Running time-frequency resource.

Brief description

Fig. 1 is the transmitting terminal structure chart of mimo-fbmc system；

Fig. 2 is the receiving terminal structure chart of mimo-fbmc system；

Fig. 3 (a) is the first preferable mimo-fbmc pilot frequency sequence structure schematic diagram of the application；

Fig. 3 (b) is the application second preferable mimo-fbmc pilot frequency sequence structure schematic diagram；

Fig. 4 is the sending end structure figure of the channel estimation process of mimo-fbmc of the application；

Fig. 5 is the receiving terminal structure chart of the channel estimation process of mimo-fbmc of the application；

Fig. 6 is the schematic diagram of the orthogonal sequence that the embodiment of the present application one uses；

The orthogonal sequence of Fig. 6 is expanded to the schematic diagram of pilot tone time domain sequences for the embodiment of the present application one by Fig. 7；

The time domain sequences of Fig. 7 are transformed to the result of frequency domain for the embodiment of the present application one after fft module by Fig. 8 Schematic diagram；

Fig. 9 is the final transmission pilot tone schematic diagram of the embodiment of the present application one；

Figure 10 is the schematic diagram of the orthogonal sequence that the embodiment of the present application two uses；

The orthogonal sequence of Figure 10 is expanded to the schematic diagram of pilot tone time domain sequences for the embodiment of the present application two by Figure 11；

The time domain sequences of Figure 11 are transformed to the knot of frequency domain for the embodiment of the present application two after fft module by Figure 12 Fruit schematic diagram；

Figure 13 is the final transmission pilot tone schematic diagram of the embodiment of the present application two；

Figure 14 is the module diagram of the preferable pilot tone dispensing device of the application one；

Figure 15 is the module diagram of the preferable pilot reception device of the application one.

Specific embodiment

Purpose, technical scheme and advantage for making the application become more apparent, and develop simultaneously enforcement referring to the drawings Example, is described in further detail to the application.

Fig. 3 (a) and Fig. 3 (b) respectively illustrates the pilot configuration of the preferable mimo-fbmc system of two kinds of the present invention, Whole pilot portion includes two row: string is conventional pilot (conventional preamble), and in addition string is auxiliary Assistant director of a film or play's frequency (auxiliary preamble), the string running time-frequency resource that conventional pilot is located in this application is also referred to as led Frequency domain (preamble zone).The adjacent side of conventional pilot is respectively string auxiliary pilot and string is referred to as base value According to the data of (reference data), the wherein value of auxiliary pilot is determined by the value of benchmark data.Fig. 3 (a) leads In frequency structure, auxiliary pilot is located at the right side of conventional pilot, and benchmark data is located at the left side of conventional pilot.Fig. 3 (b) Pilot configuration in auxiliary pilot be located at conventional pilot left side, benchmark data be located at conventional pilot right side.

In above two pilot configuration, the value of each position is:

Step one: the value of the odd positions of auxiliary pilot is equal to the value of the corresponding odd positions of benchmark data.

Step 2: the value of the even number position of auxiliary pilot is equal to the inverse value of the value of the corresponding even number position of benchmark data.

Step 3: the value of the even number position of conventional pilot is zero.

Sequence c=[c (0), c (1) ..., c (l-1)] being l (l be even number) for a length^t, herein described " odd number The value of position " refers to c (0)(2),The value of (these 2) position；" value of even number position " refers to c(1)(3),, the value of (these 1) position.According to the symmetry of wave filter interference, in the odd bits of pilot regions Put, the interference of wave filter is cancelled out each other, therefore, for Fig. 3 (a) and pilot configuration, pilot zone shown in Fig. 3 (b) It is zero that wave filter in the odd positions in domain disturbs, and by described pilot regions, referred to as " it is zero that wave filter disturbs to the application Region ".

The technical scheme that the application is proposed is applied to all fbmc systems, especially to mimo-fbmc system It is obtained in that more preferable beneficial effect.In description below, mainly taking mmo-fbmc system as a example said Bright.Additionally, the application needs to construct the time domain sequences collection of time domain using orthogonal sequence, these orthogonal sequences it Between dependency be zero or close to zero, taking zcz sequence as a example illustrate in follow-up explanation.And, Assume that mimo-fbmc system is a mimo system with t root transmission antenna and r root reception antenna, son Carrier wave size is m, and number of channel taps is l_h, q (q=1,2 ... t) the zcz sequence that root transmission antenna usesSequence length meet p=1/4m, zcz arrangement set size is N (n >=t), zero correlation area size is z >=l_h-1.

Fig. 4 is the transmitting terminal signal processing (that is: pilot sending method) for channel estimation methods of the present invention, This transmitting terminal signal processing, compared with process shown in Fig. 1, is mainly carried out to fbmc modulation system part Improve, mainly comprise the steps that

For each transmission antenna q (q=1,2 ..., t), execution step one is to step 3:

Step one: select zcz sequence c from zcz arrangement set remaining zcz sequence_q, its length Meet p=1/4m, this sequence is expanded to, according to formula (6), the time domain sequences as pilot tone that a length is m s_q=[s_q(0),s_q(1),...,s_q(m-1)]^t:

$\left\{\begin{array}{cc}{s}_q\left(k\right)c_q\left(k\right)& k=0,1,\mathrm{...},p-1\\ s_q\left(k\right)=c_q^{*}\left(0\right)& k=p\\ s_q\left(k\right)=c_q^{*}(2p-k)& k=p+1,...,2p-1\\ s_q\left(k\right)=c_q(k-2p)& k=2p,\mathrm{...},3p-1\\ s_q\left(k\right)=c_q^{*}\left(0\right)& k=3p\\ s_q\left(k\right)=c_q^{*}(4p-k)& k=3p+1,\mathrm{...},4p-1\end{array}\right.---\left(6\right)$

Here, zcz arrangement set can be predefined, wherein comprise some length be p=1/4m when Domain zcz sequence, between described zcz sequence mutually orthogonal and meet zero correlation area size be not less than channel tap Number, i.e. z >=l_h-1.Transmitting terminal can according to predefined or system call authorization signaling, be each antenna from A zcz sequence is selected as pilot tone in zcz arrangement set.

Step 2: to sequence s_qThe fast Fourier transform (fft) carrying out m point obtains the frequency domain sequence that length is mThis process can be represented by formula (7).Now by sequence s_qBecome with Fourier The property changed understands, s_qIt is a purely real sequence and its even bit is set to zero.Fourier transformation (ft) be by when Domain signal is converted into the general designation of the conversion method of frequency-region signal, when signal is for discrete signal, typically passes through discrete Fourier transformation (dft) or fast Fourier transform (fft) are converted to frequency-region signal.The application enters taking fft as a example Row explanation.

$s_q\left(k\right)=\underset{n=0}{\overset{m-1}{\&sigma;}}{s}_q\left(n\right)\&centerdot;e^{-j2\mathrm{\&pi;}\frac{k}{m}n},k=0,1,\mathrm{...},m-1---\left(7\right)$

Step 3: by sequence s_qOdd positions on value be added on the correspondence position of pilot regions, sent out Send pilot tone t=[t (0), t (1) ..., t (m-1)]^t.This process can be expressed as with formula (8):

$\{\begin{array}{cc}t\left(k\right)=\underset{q=1}{\overset{t}{\&sigma;}}{s}_q\left(k\right)& k=0,2,\mathrm{...},m-2\\ t\left(k\right)=0& k=1,3,\mathrm{...},m-1\end{array}---\left(8\right)$

To all transmission antenna execution steps one to after step 3, obtain sending pilot tone.

Step 4: the data block header after modulated to each data flow respectively adds and sends pilot tone, and this transmission is led Frequency is used for the channel estimation of mimo-fbmc system.

Step 5: the data added after pilot tone is orthogonalized by phase mapping, inverse Fourier transform and passes through into After mode filter completes filtering operation, each data flow is respectively mapped to corresponding transmission antenna and is transmitted.

Fig. 5 is the receiving end signal processing procedure (that is: pilot reception method) for the application channel estimation methods, The signal receiving is exported by the different antennae of mimo-fbmc system receiving terminal respectively, becomes different data flows, According to the processing method of fbmc system, different data flows is processed respectively；Particularly as follows: first signal is received And it is processed into digital signal, then filtered by matched filter, carry out Fourier transformation, synchronous reception etc. is processed. This receiving terminal processing procedure, compared with process shown in Fig. 2, is mainly improved to channel estimation and equalizing sections, Comprise the following steps:

Step one: with pth (p=1,2 ..., r) as a example root reception antenna, extract the routine corresponding to transmission antenna The data of pilot regions position obtains r_p=[r_p(0),r_p(1),...,r_p(m-1)]^t.Because mimo-fbmc system is sent out Penetrate end and receiving terminal all knows particular location in time frequency domain dimension for the signal, can be with extracting directly in receiving terminal Go out the data of relevant position.That now takes out this receipt signal odd positions is worth to sequence y_p=[y_p(0),y_p(1),...,y_p(m-1)]^t, this process is expressed as by equation below (9):

$\{\begin{array}{cc}{y}_p\left(k\right)=r_p\left(k\right)& k=0,2,\mathrm{...},m-2\\ y_p\left(k\right)=0& k=1,3,\mathrm{...},m-1\end{array}---\left(9\right)$

Step 2: by sequences y_pThrough m point inverse Fourier transform to time domain, obtain the reception value of time domain y_p=[y_p(0),y_p(1),...,y_p(m-1)]^t, this process can represent by equation below (10):

$\begin{array}{cc}{y}_q\left(n\right)=\frac{1}{m}\underset{k=0}{\overset{m-1}{\&sigma;}}{y}_q\left(k\right)\&centerdot;e^{j2\mathrm{\&pi;}\frac{k}{m}n}& n=0,1,\mathrm{...},m-1\end{array}---\left(10\right)$

Step 3: construction demodulation matrix d_qFor:

$d_q={\left[\begin{array}{ccccc}{c}_q\left(0\right)& c_q(m-1)& \mathrm{...}& c_q(m-l_h+2)& c_q(m-l_h+1)\\ c_q\left(1\right)& c_q\left(0\right)& \mathrm{...}& c_q(m-l_h+3)& c_q(m-l_h+2)\\ .& .& .& .& .\\ .& .& .& .& .\\ .& .& .& .& .\\ c_q(m-2)& c_q(m-3)& \mathrm{...}& c_q(m-l_h)& c_q(m-l_h-1)\\ c_q(m-1)& c_q(m-2)& \mathrm{...}& c_q(m-l_h+1)& c_q(m-l_h)\end{array}\right]}_{m\&times;l_h}$

Step 4: final channel tap response is estimated as:

$h_{p,q}={\left(d_q^h{d}_q\right)}^{-1}{d}_q^h{y}_p---\left(11\right)$

Wherein

Step 5: time domain channel taps response is transformed to frequency domain through m point fft, the channel obtaining frequency domain is estimated Meter response h_p,q=[h_p,q(0),...,h_p,q(1),h_p,q(l_h-1)]^t.Receiver is first with h_p,qReceipt signal is carried out all Weighing apparatus, thus compensating the impact to sending signal for the multipath channel, then each data flow is according to fbmc Demodulation Systems Process, completes the demodulation of information symbol level.

Step 6: the Interference Cancellation in the reception structure of traditional vblast for the data input after step 5 Valid data in detection module, thus eliminating the interference between multiple antennas, after output AF panel.

Step 7: the data input qam demodulation module after step 6, then completed by parallel-serial conversion The output of effect bit information.

Below by two specific embodiments, technical scheme is illustrated.

Embodiment one:

Present embodiment assumes that this mimo-fbmc system is one has 2 transmission antennas and 2 reception antennas Mimo system, take 4qam modulate, subcarrier size be m=32, number of channel taps be l_h=2, Identical with data capacity in order to reach pilot frequency sequence energy, 2 length of employing are the zcz after the normalization of p=8 Sequence is:

$c_1={\&lsqb;-1,1,1,-1,1,1,-1,-1\&rsqb;}^t/\sqrt{m}$

$c_2={\&lsqb;-1,-1,1,1,1,-1,-1,1\&rsqb;}^t/\sqrt{m}$

Pilot configuration takes the structure of Fig. 3 (a), and mimo-fbmc system constructs according to the mode in Fig. 6～Fig. 9 Send pilot tone.

Fig. 6 is illustrated that the orthogonal sequence that in the present embodiment, transmission antenna 1 and transmission antenna 2 are used.First Orthogonal sequence in Fig. 6 is gone out the pilot tone time domain sequences shown in Fig. 7 according to the method construct of formula (6)；Again by Fig. 7 In sequence carry out after fft conversion, obtaining the frequency domain sequence of real numbers shown in Fig. 8 according to formula (7)；Again by Fig. 8 Sequence be placed in pilot regions as conventional pilot, and auxiliary pilot corresponding positions are arranged according to the value of benchmark data The value put, finally gives the transmission pilot tone of Fig. 9.

In the process of receiving terminal, the structure according to Fig. 5 first extracts the reception value of pilot regions position, then basis Formula (9)～(11) carry out follow-up process.

Embodiment two:

Present embodiment assumes that this mimo-fbmc system is one has 2 transmission antennas and 2 reception antennas Mimo system, take 16qam modulate, subcarrier size be m=32, number of channel taps be l_h=2, Identical with data capacity in order to reach pilot frequency sequence energy, 2 length taken are the zcz after the normalization of p=8 Sequence is:

$c_1={\&lsqb;1,0.923-0.382,-1i,-0.923+0.382,1,-0.923+0.382,-1i,0.923-0.382\&rsqb;}^t/\sqrt{m}$

$c_2={\&lsqb;1,-0.923+0.382,-1i,0.923-0.382,1,0.923-0.382i,-1i,-0.923+0.382i\&rsqb;}^t/\sqrt{m}$

Pilot configuration takes the structure of Fig. 3 (b), and mimo-fbmc system is according to the mode structure in Figure 10～Figure 13 Make transmission pilot tone.

Figure 10 is illustrated that the orthogonal sequence that in the present embodiment, transmission antenna 1 and transmission antenna 2 are used.First Orthogonal sequence in Figure 10 is gone out the pilot tone time domain sequences shown in Figure 11 according to the method construct of formula (6)；Again will Sequence in Figure 11 carries out obtaining the frequency domain sequence of real numbers shown in Figure 12 after fft conversion according to formula (8)；Again will Sequence in Figure 12 is placed in pilot regions as conventional pilot, and arranges auxiliary pilot according to the value of benchmark data The value of relevant position, finally gives the transmission pilot tone of Figure 13.

In the process of receiving terminal, the structure according to Fig. 5 first extracts the reception value of pilot regions position, then basis Formula (9)～(11) carry out follow-up process.

Corresponding to the application pilot sending method, present invention also provides a kind of pilot tone dispensing device, it is applied to fbmc System, module diagram such as Figure 14 of this device, comprising:

Transmitting terminal first module, produces the time domain orthogonal sequence as pilot tone, and the length of described time domain orthogonal sequence is expanded Open up the subcarrier length equal to described fbmc system；

Transmitting terminal second module, the time domain orthogonal sequence after extension is transformed into frequency domain sequence；

Transmitting terminal three module, the value in the odd positions of described frequency domain sequence is added to the odd positions of pilot regions On be transmitted.

Corresponding to the application pilot reception method, present invention also provides a kind of pilot reception device, it is applied to fbmc System, module diagram such as Figure 15 of this device, comprising:

Receiving terminal first module, extracts the data of the pilot regions corresponding to transmitting terminal from receipt signal；

Receiving terminal second module, obtains the reception value of frequency domain according to described data；

Receiving terminal three module, the reception value of described frequency domain is transformed to time domain, obtains the reception value of time domain；

Receiving terminal the 4th module, calculates time domain channel taps response and estimates；

Receiving terminal the 5th module, by time domain channel taps response transform to frequency domain, the channel estimation obtaining frequency domain is rung Should.

The foregoing is only the preferred embodiment of the application, not in order to limit the application, all in the application Spirit and principle within, any modification, equivalent substitution and improvement done etc., should be included in the application protect Within the scope of shield.

Claims (13)

1. a kind of pilot sending method, is applied to filter bank multi-carrier fbmc system it is characterised in that including:

Each transmission antenna is executed respectively with a～c:

A, the time domain orthogonal sequence as pilot tone for the generation, the length of described time domain orthogonal sequence is expanded to equal to described The subcarrier length of fbmc system；

B, by extension after time domain orthogonal sequence be transformed into frequency domain sequence；

C, the value in the odd positions of described frequency domain sequence is added on the correspondence position of pilot regions it is transmitted.

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

Described pilot regions disturb for wave filter be zero region.

3. method according to claim 1 and 2 it is characterised in that:

The both sides of described pilot regions are respectively auxiliary pilot data.

4. method according to claim 3 it is characterised in that:

The value of the odd positions of auxiliary pilot is equal to the value of the corresponding odd positions of described data, the even number position of auxiliary pilot Value be equal to the corresponding even number position of described data value inverse value；

The value of the even number position of pilot regions is 0.

5. method according to claim 4 it is characterised in that:

Described c includes: will be enterprising for odd positions that the value in the odd positions of described frequency domain sequence is added to pilot regions Row sends.

6. a kind of pilot tone dispensing device, is applied to fbmc system it is characterised in that including:

Transmitting terminal first module, produces the time domain orthogonal sequence as pilot tone, and the length of described time domain orthogonal sequence is expanded Open up the subcarrier length equal to described fbmc system；

Transmitting terminal second module, the time domain orthogonal sequence after extension is transformed into frequency domain sequence；

Transmitting terminal three module, the value in the odd positions of described frequency domain sequence is added to the odd positions of pilot regions On be transmitted.

7. a kind of pilot reception method, the method is used for being sent to using pilot sending method described in claim 1 Pilot tone processed it is characterised in that being included:

Operate to below each reception antenna execution:

A1, extract the data of pilot regions corresponding to transmitting terminal from receipt signal；

B1, obtain the reception value of frequency domain according to described data；

C1, the reception value of described frequency domain is transformed to time domain, obtain the reception value of time domain；

D1, calculating time domain channel taps response are estimated；

E1, by time domain channel taps response transform to frequency domain, obtain the channel estimation response of frequency domain.

8. method according to claim 7 it is characterised in that:

Described pilot regions disturb for wave filter be zero region.

9. the method according to claim 7 or 8 it is characterised in that:

Described b1 includes: described data is carried out with the zero padding operation of even number position, obtains the reception value of frequency domain.

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

The both sides of described pilot regions are respectively auxiliary pilot data.

11. methods according to claim 10 it is characterised in that:

The value of the odd positions of auxiliary pilot is equal to the value of the corresponding odd positions of described data, the even number position of auxiliary pilot Value be equal to the corresponding even number position of described data value inverse value；

The value of the even number position of pilot regions is 0.

12. methods according to claim 11 it is characterised in that:

Described a1 includes: extracts the data being in odd positions in described pilot regions from receipt signal.

A kind of 13. pilot reception devices, are applied to fbmc system it is characterised in that including:

Receiving terminal first module, extracts the data of the pilot regions corresponding to transmitting terminal from receipt signal；

Receiving terminal second module, obtains the reception value of frequency domain according to described data；

Receiving terminal three module, the reception value of described frequency domain is transformed to time domain, obtains the reception value of time domain；

Receiving terminal the 4th module, calculates time domain channel taps response and estimates；

Receiving terminal the 5th module, time domain channel taps response transform to frequency domain obtains the channel estimation response of frequency domain.