CN205921608U - Antenna structure based on many carrier system of filter bank - Google Patents

Abstract

The utility model discloses an antenna structure based on many carrier system of filter bank, the real number field orthogonality condition that combines the FBMC system, the utility model provides a be applicable to the data construction that sends of FBMC system, this structure is certain two symbol s1 and s2 constantly on every transmitting antenna, launched at two continuous time slots, this structure transmitter data is including being used for the original data who sends and being used for offsetting ancillary data two parts that data were disturbed, original data provides at random, ancillary data is original data's conjugation, it can perhaps to bear the conjugation, (img file='DDA0001069108530000011. TIF'wi='141'he='71' /) perhaps (img file='DDA0001069108530000012. TIF'wi='201'he='70' /) promptly compared with the prior art, the utility model it is easy and simple to handle, utilize the interference characteristic of system simultaneously, can eliminate and receive intersymbol interference and subcarrier interference in the data, be applicable to single antenna and multi -antenna system.

Description

Antenna structure based on filter bank multi-carrier system

Technical field

This utility model belong to wireless communication technology field and in particular to for filter bank multi-carrier (fbmc) system and Transmission data structure techniques in filter bank multi-carrier (fbmc) multiaerial system.

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,jun.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, υ₀And τ₀Represent fbmc 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), white Gaussian noise For n (t), the mathematic(al) representation of fbmc system receipt signal is:

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

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

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

Wherein,AndRepresent all symbols Interference between number and subcarrier interference, this part disturbs the characteristic to system to have considerable influence, is to need in various technical research Problem to be solved.

Utility model content

This utility model is to solve above-mentioned technical problem it is proposed that a kind of sky knot based on filter bank multi-carrier system Structure, to offset the interference of data symbol by using assistance data.

The technical solution adopted in the utility model is: the antenna structure based on filter bank multi-carrier system, comprising: send End and receiving terminal；

The transmitting terminal of described every transmission antenna includes: assistance data generation module, qam modulation module, pilot frequency sequence add Plus module, orthogonalization phase mapping module, ifft conversion module, filtration module and transmitter unit；Described assistance data produces Module is used for according to originally transmitted data genaration assistance data, and described qam modulation module is used for originally transmitted data and auxiliary Data carries out quadrature amplitude modulation, and described pilot frequency sequence add module is used for the data block head after the modulation of qam modulation module Portion adds pilot frequency sequence, and the data that described orthogonalization phase mapping module is used for that pilot frequency sequence add module is exported carries out orthogonal Change phase mapping, described ifft conversion module is used for carrying out ifft conversion, institute to the data of orthogonalization phase mapping module output State filtration module to be filtered processing for the data that ifft conversion module is exported, described transmitter unit is used for filtration module Output data launch；

The receiving terminal of described every reception antenna includes: receiving unit, matched filtering module, fft conversion module, relevant behaviour Make module, balance module, remove orthogonalization phase mapping module and qam demodulation module；Described receiving unit is derived from for reception The data of transmitting terminal；Described matched filtering module is used for carrying out matched filtering process to the data receiving；Described fft becomes die change Block is used for carrying out fft conversion process to the data after matched filtering, obtains originally transmitted data and auxiliary sends data；Described phase Dry run module is used for sending data to the originally transmitted data obtaining and auxiliary, does coherent operations and divided by 2；Described equilibrium model Block is used for according to channel information, does equilibrium treatment and eliminates multi-path jamming；Described go orthogonalization phase mapping module for equilibrium The data of module output carries out recovering the process of orthogonalization phase mapping；Described qam demodulation module is used for going orthogonalization phase place to reflect The data penetrating module output carries out qam demodulation.

Further, described assistance data is the conjugation data of originally transmitted data or negative conjugation data.

Further, if the coherent operations described in coherent operations module are particularly as follows: assistance data is being total to of initial data Conjugate data, then do phase reducing；If assistance data is the negative conjugation data of initial data, do phase add operation.

A kind of the beneficial effects of the utility model: sky knot based on filter bank multi-carrier system of the present utility model Structure, the real number field orthogonality condition in conjunction with fbmc system is it is proposed that a kind of be applied to the channel estimation methods of fbmc system and send out Send data structure, this structure is in two symbol s sometime₁And s₂, it is launched in two continuous time slots, this structure sends Data includes the initial data for sending and the assistance data two parts for offsetting data interference, and initial data is sent out at random Put, assistance data is the conjugation of initial data, or negative be conjugated, that is,OrThis utility model is with now There is technology to compare easy and simple to handle, utilize system interference characteristic simultaneously, intersymbol interference and subcarrier in receiving data can be eliminated Interference is it is adaptable to single antenna and multiaerial system.

Brief description

The schematic diagram of the arbitrarily typical fbmc system that Fig. 1 provides for this utility model.

The schematic diagram of the mimo-fbmc system that Fig. 2 provides for this utility model.

The antenna structure view based on filter bank multi-carrier system that Fig. 3 provides for this utility model.

The originally transmitted data structure diagram that Fig. 4 provides for this utility model.

Fig. 5 sends data one of which structure chart for the auxiliary that this utility model provides.

Fig. 6 sends data another kind structure chart for the auxiliary that this utility model provides.

The originally transmitted data structure diagram that Fig. 7 provides for this utility model embodiment.

Fig. 8 sends data structure diagram for the auxiliary that this utility model embodiment provides.

Specific embodiment

For ease of skilled artisan understands that technology contents of the present utility model, below in conjunction with the accompanying drawings to this utility model Content is explained further.

It is illustrated in figure 1 the schematic diagram of arbitrarily typical fbmc system, Fig. 2 is arbitrarily typical mimo-fbmc system Schematic diagram, this utility model passes through to increase assistance data generation module in the qam modulation module money of transmitting terminal, and in receiving terminal Fft module and balance module between add coherent operations module, realize offsetting the purpose of interference, the application's is substantially practical new The antenna assumption diagram based on filter bank multi-carrier system that type provides is as shown in Figure 3: includes: transmitting terminal and receiving terminal；

The transmitting terminal of described every transmission antenna includes: assistance data generation module, qam modulation module, pilot frequency sequence add Plus module, orthogonalization phase mapping module, ifft conversion module, filtration module and transmitter unit；Described assistance data produces Module is used for according to originally transmitted data genaration assistance data, and described qam modulation module is used for originally transmitted data and auxiliary Data carries out quadrature amplitude modulation, and described pilot frequency sequence add module is used for the data block head after the modulation of qam modulation module Portion adds pilot frequency sequence, and the data that described orthogonalization phase mapping module is used for that pilot frequency sequence add module is exported carries out orthogonal Change phase mapping, described ifft conversion module is used for carrying out ifft conversion, institute to the data of orthogonalization phase mapping module output State filtration module to be filtered processing for the data that ifft conversion module is exported, described transmitter unit is used for filtering mould The output data of block is launched；

The receiving terminal of described every reception antenna includes: receiving unit, matched filtering module, fft conversion module, relevant behaviour Make module, balance module, remove orthogonalization phase mapping module and qam demodulation module；Described receiving unit is derived from for reception The data of transmitting terminal；Described matched filtering module is used for carrying out matched filtering process to the data receiving；Described fft becomes die change Block is used for carrying out fft conversion process to the data after matched filtering, obtains originally transmitted data and auxiliary sends data；Described phase Dry run module is used for sending data to the originally transmitted data obtaining and auxiliary, does coherent operations and divided by 2；Described equilibrium model Block is used for according to channel information, does equilibrium treatment and eliminates multi-path jamming；Described go orthogonalization phase mapping module for equilibrium The data of module output carries out recovering the process of orthogonalization phase mapping；Described qam demodulation module is used for going orthogonalization phase place to reflect The data penetrating module output carries out qam demodulation.

If the coherent operations described in coherent operations module are particularly as follows: assistance data is the conjugation data of initial data, Do phase reducing；If assistance data is the negative conjugation data of initial data, do phase add operation.

This utility model also provides a kind of fbmc system equalization method based on assistance data, comprising:

S1, transmitting terminal data processing；Specifically include following step by step:

S11, according to originally transmitted data produce assistance data；One transmission data resource is divided into two parts, first part Send initial data, second part of resource is used for pretreatment, is set to the conjugation data of first part of number of resource blocks evidence, for producing and The contrary data of absolute value same-sign in data block 1；

S12, the assistance data to originally transmitted data and step s11, carry out quadrature amplitude modulation；

S13, the data block header after the modulation of step s12 add pilot frequency sequence；

S14, phase mapping is orthogonalized to the data that step s13 obtains；

S15, the data that step s14 is obtained carry out ifft conversion；

S16, step s15 is obtained with data it is filtered processing, and launch；

S2, receiving terminal data processing, specifically include following step by step:

S21, matched filtering process is carried out to the data receiving；

S22, the data that step s21 is obtained carry out fft conversion, obtain originally transmitted data and auxiliary sends data；

S23, the originally transmitted data that step s22 is obtained and auxiliary send data, do coherent operations and divided by 2；

S24, the data that step s23 is obtained, extract channel information according to pilot frequency sequence, then according to the channel letter extracting Breath, does equilibrium treatment and eliminates multi-path jamming；Doing equalization operation after receiving terminal first carries out plus-minus operation, being because if first done Equalization operation, because in actual communication system, channel estimation is devious, in this case first do equilibrium can increase dry Disturb.And first carry out plus-minus operation, because in this communication environment, channel between originally transmitted data and assistance data Coefficient can consider approximately the same, just eliminates the interference that channel estimation bias are brought in this case.

S25, the data that step s24 is obtained carry out recovering the process of orthogonalization phase mapping；

S26, the data that step s25 is obtained carry out qam demodulation.

Above-mentioned interpolation pilot frequency sequence, orthogonalization phase mapping, ifft conversion, Filtering Processing, matched filtering process, fft become Change, qam modulation /demodulation is the conventional treatment technology of communication technical field, here does not do excessive explanation.

Assistance data is adopted to offset the principle disturbed in the application as follows:

The negative conjugation data instance with assistance data as initial data for the present embodiment illustrates, and random citing is as original Send data as shown in fig. 7, the assistance data that produced according to originally transmitted data of transmitting terminal as shown in figure 8, described Fig. 7,8 be Data structure is described, the size for wherein time and frequency has no and does concrete plan.Ambiguity function is a kind of very important When signal is carried out-function of frequency specificity analysises.

Ambiguity in definition function a first_g(τ, υ) is:

Wherein, υ and τ represents the variable of fbmc system subcarrier interval and sending signal time interval respectively, and g (*) represents Forming filter function, g^*(*) represent the conjugation of g (*).

If the sending signal at fbmc system transmitting terminal time-frequency lattice site (m, n) place is a_m,n, then correspond to receiving terminal time-frequency The sending signal receiving on lattice point (m ', n ') position can be expressed as:

${\hat{a}}_{m,n}=a_{m,n}+\underset{m\&notequal;m^{\&prime;},n\&notequal;n^{\&prime;}}{\&sigma;}{a}_{m^{\&prime;},n^{\&prime;}}<g_{m,n}|g_{m^{\&prime;},n^{\&prime;}}>---\left(6\right)$

Formula (6) can be expressed as with ambiguity function:

${\hat{a}}_{m,n}=\underset{p,q}{\&sigma;}{a}_{k+p,l+q}{j}^{p+q+p(q+2n)}{a}_g^{*}({\mathrm{q\&tau;}}_0,{\mathrm{p\&upsi;}}_0)---\left(7\right)$

Defining the lattice point neighborhood that time-frequency coordinate is (m, n) is ω_δm,δn={ (p, q), | p |≤δ m, | q |≤δ n }, and There is (p, q) ≠ (0,0).Due to the time-frequency focusing of wave filter, wave filter interference mostlys come from (m-1, m+1), (n-4, n+4) These data symbols, therefore formula (7) can be further simplified as (part is omitted):

$\begin{array}{c}{\hat{a}}_{m,n}^1\&ap;\mathrm{...}+a_{m,n}{a}_g^{*}(0,0)+a_{m-1,n-1}{j}^{-2n-1}{a}_g^{*}(-{\mathrm{\&tau;}}_0,-{\mathrm{\&upsi;}}_0)+a_{m-1,n}{j}^{-2n-1}{a}_g^{*}(0,-{\mathrm{\&upsi;}}_0)\\ +a_{m-1,n+1}{j}^{-2n-1}{a}_g^{*}({\mathrm{\&tau;}}_0,-{\mathrm{\&upsi;}}_0)+a_{m,n-1}{j}^{-1}{a}_g^{*}(-{\mathrm{\&tau;}}_0,0)+a_{m,n+1}{\mathrm{ja}}_g^{*}({\mathrm{\&tau;}}_0,0)\\ +a_{m+1,n-1}{j}^{2n-1}{a}_g^{*}(-{\mathrm{\&tau;}}_0,{\mathrm{\&upsi;}}_0)+a_{m+1,n}{j}^{2n+1}{a}_g^{*}(0,{\mathrm{\&upsi;}}_0)+a_{m+1,n+1}{j}^{2n+3}{a}_g^{*}({\mathrm{\&tau;}}_0,{\mathrm{\&upsi;}}_0)+\mathrm{...}\end{array}---\left(8\right)$

For the transmission symbol positioned at time-frequency lattice (m, n), recycle the property of ambiguity function:

$a_g(0,0)=1,a_g(\&plusminus;\mathrm{\&tau;},\&plusminus;\mathrm{\&upsi;})=a_g(\mathrm{\&tau;},\mathrm{\&upsi;})=a_g^{*}(\mathrm{\&tau;},\mathrm{\&upsi;})---\left(9\right)$

The initial data receiving data is made to beThen according to the receiving data in Fig. 4 assistance data formula (8)For:

$\begin{array}{c}{\hat{a}}_{m,n}^2\&ap;\mathrm{...}+a_{m,n}{a}_g^{*}(0,0)+a_{m-1,n-1}{j}^{-2n-1}{a}_g^{*}(-{\mathrm{\&tau;}}_0,-{\mathrm{\&upsi;}}_0)-a_{m-1,n}{j}^{-2n-1}{a}_g^{*}(0,-{\mathrm{\&upsi;}}_0)\\ +a_{m-1,n+1}{j}^{-2n-1}{a}_g^{*}({\mathrm{\&tau;}}_0,-{\mathrm{\&upsi;}}_0)-a_{m,n-1}{j}^{-1}{a}_g^{*}(-{\mathrm{\&tau;}}_0,0)-a_{m,n+1}{\mathrm{ja}}_g^{*}({\mathrm{\&tau;}}_0,0)\\ +a_{m+1,n-1}{j}^{2n-1}{a}_g^{*}(-{\mathrm{\&tau;}}_0,{\mathrm{\&upsi;}}_0)-a_{m+1,n}{j}^{2n+1}{a}_g^{*}(0,{\mathrm{\&upsi;}}_0)+a_{m+1,n+1}{j}^{2n+3}{a}_g^{*}({\mathrm{\&tau;}}_0,{\mathrm{\&upsi;}}_0)+\mathrm{...}\end{array}---\left(10\right)$

According to the receiving data in Fig. 5 assistance data formula (8)For:

$\begin{array}{c}{\hat{a}}_{m,n}^2\&ap;\mathrm{...}+a_{m,n}{a}_g^{*}(0,0)-a_{m-1,n-1}{j}^{-2n-1}{a}_g^{*}(-{\mathrm{\&tau;}}_0,-{\mathrm{\&upsi;}}_0)+a_{m-1,n}{j}^{-2n-1}{a}_g^{*}(0,-{\mathrm{\&upsi;}}_0)\\ -a_{m-1,n+1}{j}^{-2n-1}{a}_g^{*}({\mathrm{\&tau;}}_0,-{\mathrm{\&upsi;}}_0)+a_{m,n-1}{j}^{-1}{a}_g^{*}(-{\mathrm{\&tau;}}_0,0)+a_{m,n+1}{\mathrm{ja}}_g^{*}({\mathrm{\&tau;}}_0,0)\\ -a_{m+1,n-1}{j}^{2n-1}{a}_g^{*}(-{\mathrm{\&tau;}}_0,{\mathrm{\&upsi;}}_0)+a_{m+1,n}{j}^{2n+1}{a}_g^{*}(0,{\mathrm{\&upsi;}}_0)-a_{m+1,n+1}{j}^{2n+3}{a}_g^{*}({\mathrm{\&tau;}}_0,{\mathrm{\&upsi;}}_0)+\mathrm{...}\end{array}---\left(11\right)$

It can thus be seen that the interference in the interference of auxiliary signal receiving terminal data division and originally transmitted data is contrary each other Number, in receiving terminal, is first according to fbmc and receipt signal is done demodulation process corresponding to transmitting terminal, originally transmitted to receive Data h₁s₁+n₁, and auxiliary transmission data h receiving₂s₂+n₂Do phase add operation, obtain:

$({\hat{a}}_{m,n}^1+{\hat{a}}_{m,n}^2)/2\&ap;+a_{m,n}{a}_g^{*}(0,0)+a_{m-1,n}{j}^{-2n-1}{a}_g^{*}(0,-v_0)+a_{m+1,n}{j}^{2n+1}{a}_g^{*}(0,v_0)---\left(12\right)$

Counteract the part interference in initial data, impact is not resulted on other operations such as equilibriums yet.As shown in fig. 6, When the interference in the interference of auxiliary signal receiving terminal data division with originally transmitted data is identical, only both phases need to be incited somebody to action in receiving terminal Subtract, equally can achieve the part interference counteracting in initial data, impact is not resulted on other operations such as equilibriums yet.

Those of ordinary skill in the art will be appreciated that, embodiment described here is to aid in reader and understands this reality With new principle it should be understood that protection domain of the present utility model is not limited to such special statement and embodiment. For a person skilled in the art, this utility model can have various modifications and variations.All in spirit of the present utility model Within principle, any modification, equivalent substitution and improvement made etc., should be included in right of the present utility model Within.

Claims (3)

1. the antenna structure based on filter bank multi-carrier system is it is characterised in that include: transmitting terminal and receiving terminal；

Described transmitting terminal includes: assistance data generation module, qam modulation module, pilot frequency sequence add module, orthogonalization phase place are reflected Penetrate module, ifft conversion module, filtration module and transmitting antenna；Described assistance data generation module is used for according to originally transmitted Data genaration assistance data, described qam modulation module is used for carrying out quadrature amplitude modulation to originally transmitted data and assistance data, Described pilot frequency sequence add module be used for through qam modulation module modulation after data block header add pilot frequency sequence, described just Friendshipization phase mapping module is used for being orthogonalized phase mapping to the data of pilot frequency sequence add module output, and described ifft becomes Die change block is used for carrying out ifft conversion to the data of orthogonalization phase mapping module output, and described filtration module is used for ifft is become The data of die change block output is filtered processing, and described transmitting antenna is used for launching the output data of filtration module；

Described receiving terminal includes: reception antenna, matched filtering module, fft conversion module, coherent operations module, balance module, goes Orthogonalization phase mapping module and qam demodulation module；Described reception antenna is used for receiving the data from transmitting terminal；Described Join filtration module for matched filtering process is carried out to the data receiving；After described fft conversion module is used for matched filtering Data carry out fft conversion process, obtain originally transmitted data and auxiliary send data；Described coherent operations module be used for The originally transmitted data arriving and auxiliary send data, do coherent operations and divided by 2；Described balance module is used for being believed according to channel Breath, does equilibrium treatment and eliminates multi-path jamming；The described data going orthogonalization phase mapping module to be used for balance module is exported is entered Row recovers orthogonalization phase mapping and processes；Described qam demodulation module is used for the data going the output of orthogonalization phase mapping module Carry out qam demodulation.

2. the antenna structure based on filter bank multi-carrier system according to claim 1 is it is characterised in that described auxiliary Data is the conjugation data of originally transmitted data or negative conjugation data.

3. the antenna structure based on filter bank multi-carrier system according to claim 1, described in coherent operations module If coherent operations particularly as follows: assistance data be initial data conjugation data, do phase reducing；If assistance data is original The negative conjugation data of data, then do phase add operation.