CN101848021A - Method and device for generating broadcast beam weight of intelligent antenna array - Google Patents

Abstract

The embodiment of the invention discloses a method and a device for generating broadcast beam weight of an intelligent antenna array. The method mainly comprises the following steps of: determining a calculation formula of an array response vector of the intelligent antenna array according to the form of the intelligent antenna array; determining the array response vector of each angle in the preset angle sequence through the calculation formula of the array response vector; and generating the broadcast beam weight of the intelligent antenna array through the array response vector of each angle in the angle sequence. Due to the application of the technical scheme, the method and the device have the advantages of simplifying and unifying the generating process of the broadcast beam weight of the intelligent antenna array, not needing storing the weight data of a plurality of manufacturers largely in the manufacturing and configuring processes of the intelligent antenna, reducing occupied data storage space, reducing the complexity of data design and calculation in the realizing process of the system and improving the efficiency of generating the broadcast beam weight by the system.

Description

A kind of generation method and apparatus of broadcast beam weight of intelligent antenna array

Technical field

The present invention relates to communication technical field, particularly relate to a kind of generation method and apparatus of broadcast beam weight of intelligent antenna array.

Background technology

Along with the continuous development of wireless communication technology, the limited wireless frequency resource is faced with ever-increasing communication requirement, and smart antenna (Smart Antennas) can be alleviated this contradiction to a certain extent.Antenna system can utilize the combination of a plurality of bays to carry out signal processing, adjusts emission or receiving pattern automatically, to reach optimum performance at different signal environments.The smart antenna array that is produced is the key technology in TD-SCDMA (Time Division-Synchronous Code Division MultipleAccess, the CDMA (Code Division Multiple Access) that the time-division the is synchronous) system thus.

Smart antenna is a kind of bilateral antenna that is installed in the scene, base station, obtains directivity by one group of fixed antenna unit that has the programmable electronic phase relation, and can obtain the directional characteristic of each link between base station and the travelling carriage simultaneously.Initial intelligent antenna technology is mainly used in radar, sonar, military antijam communication, is used for finishing space filtering and location etc.In recent years, go deep into gradually along with the development of mobile communication and to the research of aspects such as mobile communication radio wave propagation, networking technology, antenna theory, the development of modern digital signal processing technology rapidly, the digital signal processing chip disposal ability improves constantly, utilizing digital technology to form antenna beam in base band becomes possibility, has improved the reliability and the degree of flexibility of antenna system.Therefore intelligent antenna technology is used to have the mobile communication of complicated radio propagation environment.In addition, along with the tracking exchage amount increase rapidly with people to improving constantly that speech quality requires, require mobile radio communication under big capacity, still having higher speech quality.Therefore, the development of intelligent antenna technology is also more and more noticeable.

The principle of smart antenna is the direction that wireless signal guide is concrete, produce the spatial orientation wave beam, make antenna main beam aim at subscriber signal arrival direction DOA (Direction of Arrival), secondary lobe or zero falls into aims at the interference signal arrival direction, reaches the purpose of fully efficiently utilizing mobile subscriber's signal and deletion or suppressing interference signal.As shown in Figure 1, the wave beam for smart antenna covers schematic diagram.Simultaneously, intelligent antenna technology utilizes the difference of signal space feature between each mobile subscriber, receive with launching a plurality of mobile subscriber's signals on same channel by the array antenna technology mutual interference does not mutually take place, make the transmission of the utilization of radio-frequency spectrum and signal more effective.Under the situation that does not increase system complexity, use smart antenna can satisfy the needs of the service quality and the network capacity extension.

Wherein, the estimation of DOA is the basis of smart antenna work, is one of important application of Array Signal Processing.When a plurality of electromagnetic waves arrive antenna array from different directions, the signal that all has a plurality of electromagnetic waves to produce on each array element, these signals are because the incident direction difference has different phase delay to distribute on each array element.Promptly the output at array is total stack of the received a plurality of signals of each array element.Take this as a foundation through matrix operation, draw corresponding D OA data estimator.

Obtain after the estimation of DOA, it is the important content of smart antenna work that wave beam forms.The task that wave beam forms is to wish that the direction that arrives in received signal forms the high gain of trying one's best, and suppresses interference signal to greatest extent.That is,, form best of breed and distribution, main beam is aimed at the desired user direction, and wave beam is aimed at interference radiating way zero point baseband signal according to system performance index.

Form for the wave beam of transmitting antenna, rely on the directional information of received signal on the one hand, consider that on the other hand the direction that is not all of transmitting-receiving frequency is estimated the error brought.Therefore, the shape-endowing weight value of wave beam has played crucial effects as the important parameter that wave beam forms, and is very big to the performance impact of smart antenna.

Further, the figuration directional diagram of intelligent antenna array is classified according to practical application, can be subdivided into beam of unit, broadcast beam and business beam three classes again.Wherein, broadcast beam is mainly used in common channel and makes system broadcasts, for example: basic Common Control Channel (PCCPCH), auxiliary Common Control Channel (SCCPCH), Page Indication Channel (PICH), rapid physical Random Access Channel (FPACH) etc.Antenna producer provides the shape-endowing weight value of the broadcast beam of own smart antenna product respectively at present, when system manufacturer realizes at equipment, need store the shape-endowing weight value of the different beams type different antennae type that these producers provide respectively, the fault-tolerant weights the when antenna that also will consider different manufacturers simultaneously breaks down in the radio-frequency channel.Therefore take a large amount of memory spaces, realize that to equipment the complexity of being brought increases greatly.

At present, the broadcast beam of smart antenna array is mainly used in common channel and makes system broadcasts, and most of system manufacturer is the production of intelligent antenna not, but system manufacturer proposes the intelligent antenna technology standard, is provided by smart antenna manufacturer then.Each producer just provides the broadcast beam weight of this producer smart antenna product when selling the smart antenna product.When system manufacturer realizes at equipment, need store the broadcast beam weight of the different beams type different antennae type that these producers provide respectively, the fault-tolerant weights of broadcast beam the when antenna that also will consider different manufacturers simultaneously breaks down in the radio-frequency channel.Therefore take a large amount of memory spaces, realize that to equipment the complexity of being brought increases greatly, different manufacturers can cause smart antenna broadcast beam performance decrease in the gap of ability aspect the smart antenna algorithm optimization simultaneously, and system equipment manufacturer does not further optimize the smart antenna broadcast beam weight when equipment is realized.

In realizing process of the present invention, the inventor finds that there is following problem at least in prior art:

Antenna producer provides the shape-endowing weight value of the broadcast beam of own smart antenna product respectively at present, when system manufacturer realizes at equipment, need store the shape-endowing weight value of the different beams type different antennae type that these producers provide respectively, the fault-tolerant weights the when antenna that also will consider different manufacturers simultaneously breaks down in the radio-frequency channel.Therefore take a large amount of memory spaces, realize that to equipment the complexity of being brought increases greatly.

Summary of the invention

The embodiment of the invention provides a kind of generation method and apparatus of broadcast beam weight of intelligent antenna array, the demand flexible configuration broadcast beam that can cover according to the outfield of this smart antenna array.

For achieving the above object, the embodiment of the invention proposes a kind of generation method of broadcast beam weight of intelligent antenna array on the one hand, specifically may further comprise the steps:

According to the array format of smart antenna array, determine the computing formula of the array response vector of described smart antenna array;

By the computing formula of described array response vector, determine the array response vector of each angle in the default angle sequence;

By the array response vector of each angle in the described angle sequence, generate the broadcast beam weight of described smart antenna array.

Wherein, described array format according to smart antenna array, determine to be specially the computing formula of the array response vector of described smart antenna array:

According to the bay quantity in the described smart antenna array, determine that the computing formula of the array response vector of described smart antenna array on specific direction is:

a(θ)＝[a ₁(θ)a ₂(θ)…a _Ka(θ)]，

Wherein, Ka represents the bay total quantity in the described smart antenna array, and θ represents described specific direction pairing angle value in the residing reference coordinate system of described smart antenna array, a _i(θ) (i=1 ..., Ka) the array response parameter value of i bay on specific direction θ in the described smart antenna array of expression.

Wherein, described array format according to smart antenna array, determine also to comprise before the computing formula of array response vector of described smart antenna array:

Determine i the array response parameter value a of bay on specific direction θ in the described smart antenna array _iComputing formula (θ) is:

${\mathrm{\α}}_i\left(\mathrm{\θ}\right)=e^{j*\frac{2\mathrm{\π}}{\mathrm{\λ}}*d*(\mathrm{ka}-4.5)*\cos \left(\mathrm{\θ}\right)},$

Further, $\mathrm{\λ}=\frac{c}{f},$

Wherein, i represents the sequence number of the bay in the described smart antenna array, and e represents math constant, j represents imaginary unit, and λ represents signal wavelength, and d represents the physical distance between two each adjacent bays in the described smart antenna array, c represents the light velocity, and f represents signal frequency.

Wherein, described array format according to smart antenna array, determine also to comprise after the computing formula of array response vector of described smart antenna array:

According to the computing formula of the array response vector of described smart antenna array, determine that the computing formula of the shape-endowing weight value of described smart antenna array on described specific direction θ is:

w(θ)＝a ^H(θ)＝[a ₁(θ)a ₂(θ)…a _Ka(θ)] ^H。

Wherein, described default angle sequence specifically generates by following steps:

According to the type and the network configuration of described smart antenna array, determine the angle of coverage scope of the broadcast beam of described smart antenna array.

According to the angle of coverage scope of the broadcast beam of described smart antenna array, determine the needed angle sequence of described formation object beam width:

${\mathrm{\&theta;}}_{\mathrm{order}}=\left[\begin{array}{cccc}{\mathrm{\&theta;}}_{\mathrm{<figure-callout\; id="1"\; label="order"\; filenames="H2009100801526E0000031.png"\; state="\{\{state\}\}">order</figure-callout>}}^1& {\mathrm{\&theta;}}_{\mathrm{<figure-callout\; id="2"\; label="order"\; filenames="H2009100801526E0000031.png"\; state="\{\{state\}\}">order</figure-callout>}}^2& ...& {\mathrm{\&theta;}}_{\mathrm{order}}^N\end{array}\right].$

Wherein, described array response vector by each angle in the described angle sequence generates the broadcast beam weight of described smart antenna array, is specially:

The described shape-endowing weight value of initialization is w _Int(θ)=[0 0 ... 0] ^H

According to the array response vector of each angle in the described angle sequence, determine each angle in the described angle sequence

Go up pairing shape-endowing weight value

According to formula

(i=1......N), with the shape-endowing weight value after the described initialization respectively with described angle sequence in each angle

Go up pairing shape-endowing weight value

Carrying out N circulation adds up;

Determine the shape-endowing weight value that described N circulation adds up and generated after all finishing, be the broadcast beam weight w of described smart antenna array _BCH

On the other hand, the embodiment of the invention also proposes a kind of generating apparatus of broadcast beam weight of intelligent antenna array, specifically comprises:

First determination module is used for the array format according to smart antenna array, determines the computing formula of the array response vector of described smart antenna array;

Processing module is connected with described first determination module, is used for the computing formula by the determined array response vector of described first determination module, determines the array response vector of each angle in the default angle sequence;

Generation module is connected with described processing module, is connected with described first determination module, is used for the array response vector by each angle of the determined angle sequence of described processing module, generates the broadcast beam weight of described smart antenna array.

Wherein, described first determination module specifically comprises:

Quantity is obtained submodule, is used for obtaining the bay quantity of described smart antenna array;

Determine submodule, obtain submodule with described quantity and be connected, be used for obtaining the bay quantity that submodule obtains, determine the computing formula of the array response parameter value of bay on specific direction in the described smart antenna array according to described quantity.

Wherein, described device also comprises:

Second determination module is used for definite angle sequence that generates the broadcast beam weight of described smart antenna array.

Wherein, described second determination module specifically comprises:

Information is obtained submodule, is used to obtain the type of described smart antenna array and the information of network configuration;

First determines to obtain submodule submodule with described information and to be connected, and is used for obtaining according to described information the type and the network configuration of the smart antenna array that submodule obtains, and determines the angle of coverage scope of the broadcast beam of described smart antenna array;

Second determines submodule, determines that with described first submodule is connected, and is used for the angle of coverage scope according to the broadcast beam of described first definite determined smart antenna array of submodule, determines the needed angle sequence of described formation object beam width.

Wherein, described device also comprises:

The 3rd determination module is used for the computing formula according to the array response vector of the determined smart antenna array of described first determination module, determines the computing formula of the shape-endowing weight value of described smart antenna array on described specific direction.

Wherein, described generation module specifically comprises:

Initial submodule is used for the shape-endowing weight value of the described intelligent antenna array of initialization;

Processing sub is used for the array response vector according to each angle of the determined angle sequence of described second determination module, determines in the described angle sequence pairing shape-endowing weight value on each angle;

Submodule adds up, be connected with described processing sub with described initial submodule, be used for the shape-endowing weight value after the initialization of described initial submodule institute respectively with determined described each angle of angle sequence of described processing sub on pairing shape-endowing weight value circulate and add up;

Generate submodule, be connected, be used for determining the shape-endowing weight value that the described circulation that submodule carried out of adding up adds up and generated after all finishing, be the broadcast beam weight of described smart antenna array with the described submodule that adds up.

The technical scheme of the embodiment of the invention has the following advantages, because adopted a kind of generation method and apparatus of broadcast beam weight of intelligent antenna array, the generative process of broadcast beam weight in the smart antenna array is oversimplified, unitized, in the manufacturing and layoutprocedure of smart antenna, need not again a large amount of storages because standard disunity and the weights data of a plurality of producers that can't be compatible, reached the effect that takies, reduces design data in the systematic realizing program and computational complexity and improve the formation efficiency of system broadcasts wave beam weight that reduces data space.

Description of drawings

In order to be illustrated more clearly in the technical scheme of the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is that the wave beam of smart antenna in the prior art covers schematic diagram;

The schematic flow sheet of the generation method of a kind of broadcast beam weight of intelligent antenna array that Fig. 2 is proposed for the embodiment of the invention one;

Fig. 3 is the equidistant six array element smart antenna array structural representations of arranging of the bay straight line in the embodiment of the invention;

Fig. 4 is the equidistant eight array element smart antenna array structural representations of arranging of the bay circumference in the embodiment of the invention;

The schematic flow sheet of the generation method of a kind of broadcast beam weight of intelligent antenna array that Fig. 5 is proposed for the embodiment of the invention two;

Fig. 6 is the structural representation of eight array element directional intelligent antenna battle arrays in the embodiment of the invention;

Fig. 7 is the broadcast wave bean shaping directional diagram through obtaining after the shape-endowing weight value processing in the embodiment of the invention;

Fig. 8 is the structural representation of the generating apparatus of a kind of broadcast beam weight of intelligent antenna array that the embodiment of the invention proposed;

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.

As shown in Figure 2, the schematic flow sheet of the generation method of a kind of broadcast beam weight of intelligent antenna array that is proposed for the embodiment of the invention one specifically may further comprise the steps:

Step S201, according to the array format of smart antenna array, determine the computing formula of the array response vector of this smart antenna array.

Wherein, further comprise the computing formula of determining the array response vector of each bay on specific direction in this smart antenna array.

Further, after the computing formula of array response vector is determined to finish in this step, also comprise the computing formula of determining the shape-endowing weight value of this smart antenna array on described specific direction.

Step S202, the computing formula by array response vector are determined the array response vector of each angle in the default angle sequence.

Concrete, the computing formula with the aforesaid array response vector of the difference substitution of all angles value in this angle sequence obtains the corresponding array response vector value of each angle.

Further, above-mentioned default angle sequence is to be used for definite concrete parameter that generates the broadcast beam weight of described smart antenna array and set, and generates by following steps:

According to the type and the network configuration of this smart antenna array, determine the angle of coverage scope of the broadcast beam of this smart antenna array;

After the angle of coverage scope is determined to finish, within this angular range,, select to form the needed a plurality of directional angle of different beams width according to the requirement of network topology structure, form corresponding angle sequence.

In concrete physics realization process, the quantity of concrete selected angle in the angle sequence, and the size of each angle can be adjusted according to concrete network architecture requirement, and such variation does not influence protection scope of the present invention.

Need further be pointed out that; there is not inevitable sequencing between the flow process of the angle sequence that the computing formula constant current journey really of the array response vector of the described smart antenna array of step S201 and above-mentioned generation are default; the step S203 that two processes are respectively follow-up provides the information of operation rule and parameter; therefore; above-mentioned two sequencings that flow process describes in this article; and two pairing numberings of flow process only are for convenience of explanation and the sign of carrying out; and do not represent sequencing, preferential which flow process of carrying out does not wherein influence protection scope of the present invention.

Step S203, by the array response vector of each angle in this angle sequence, generate the broadcast beam weight of this smart antenna array.

The numerical value of initialization shape-endowing weight value, and determine corresponding shape-endowing weight value by the array response vector of each above-mentioned angle, and the shape-endowing weight value of each angle that adds up that on initialized shape-endowing weight value, circulates successively, and determine that all shape-endowing weight values that add up after finishing are the broadcast beam weight of this smart antenna array.

The technical scheme of the embodiment of the invention has the following advantages, because adopted a kind of generation method of broadcast beam weight of intelligent antenna array, the generative process of broadcast beam weight in the smart antenna array is oversimplified, unitized, in the manufacturing and layoutprocedure of smart antenna, need not again a large amount of storages because standard disunity and the weights data of a plurality of producers that can't be compatible, reached and reduced taking of data space, reduce design data and computational complexity in the systematic realizing program, the raising system generates the effect of the efficient of broadcast beam weight.

For the technical scheme of the generation method that further specifies a kind of broadcast beam weight of intelligent antenna array that the embodiment of the invention proposes, below, subsequent embodiment of the present invention is described technique scheme in conjunction with concrete enforcement scene.

Smart antenna is a kind of adaptive array antenna, and its basic principle is to utilize the spatial character of signal transmission, by adjusting the weights that transmit on each array element, the wave beam on the useful signal direction is strengthened, and suppresses to disturb thereby reach, and improves the purpose of signal interference ratio.Intelligent antenna technology has the power system capacity of raising and spectrum efficiency, reduces system interference, enlarges the advantages such as coverage of system.

Smart antenna can be divided into omnidirectional intelligent aerial array and directional intelligent antenna battle array according to type.It is not high that omnidirectional intelligent aerial array is not only gain, and to the indiscriminate reception of various signals, make communication quality greatly reduce.The fixed point radio communication adopts the directional intelligent antenna battle array, has significantly improved communication quality.In the face of numerous mobile subscribers' public correspondence net base station and specialized mobile radio net, adopt the variable antenna (smart antenna) of antenna direction (being wave beam), can make the communication quality of mobile communication obtain very big improvement.

In embodiments of the present invention; emphasis is that example describes with the directional intelligent antenna battle array, and still, omnidirectional intelligent aerial array is after adjusting the concrete span of relevant parameter; be equally applicable to the method that proposed with the embodiment of the invention, such variation does not influence protection scope of the present invention.

On the other hand, the basic functional principle of smart antenna is having equipolarization characteristic, isotropism and the identical bay that gains, arrange by certain mode, constituting aerial array, i.e. smart antenna array.The array element of forming array can be arranged by any-mode, and is normally equidistant by straight line, circumference is equidistant or equidistantly arrange on the plane, and its spacing is got half of operation wavelength usually, and is orientated identical.

As shown in Figure 3 and Figure 4, be respectively equidistant six array element smart antenna arrays of arranging of bay straight line and the equidistant eight array element smart antenna arrays of arranging of bay circumference, in these two figure, each round dot is represented a bay.The spatial arrangements mode of bay changes like this, does not influence protection scope of the present invention.

The embodiment of the invention two has proposed a kind of generation method of broadcast beam weight of intelligent antenna array, can be according to the demand flexible configuration broadcast beam of outfield covering.As shown in Figure 5, the schematic flow sheet of the generation method of a kind of broadcast beam weight of intelligent antenna array that is proposed for the embodiment of the invention two specifically may further comprise the steps:

Step S501, determine definite formula of response vector a (θ).

For antenna number is the smart antenna array of Ka, and its array response vector corresponding to specific direction θ determines that by following response vector formula (1) calculates:

a(θ)＝[a ₁(θ)a ₂(θ)…a _Ka(θ)] (1)

Wherein, Ka represents the bay total quantity in the current smart antenna array;

θ represents above-mentioned specific direction pairing angle value in the residing reference coordinate system of current smart antenna array;

a _i(θ) (i=1 ..., Ka) the array response parameter value of i bay on specific direction θ in the current smart antenna array of expression.

Concrete, for directional intelligent antenna battle array as shown in Figure 6, above-mentioned response vector determines that each matrix element in the formula (1) specifically calculates by following formula:

${\mathrm{\&alpha;}}_{\mathrm{ka}}\left(\mathrm{\&theta;}\right)=e^{j*\frac{2\mathrm{\&pi;}}{\mathrm{\&lambda;}}*d*(\mathrm{ka}-4.5)*\cos \left(\mathrm{\&theta;}\right)},$ $\mathrm{\&lambda;}=\frac{c}{f}---\left(2\right)$

Wherein, e is a math constant, and concrete numerical value is 2.71828182......;

J is an imaginary unit;

λ is a signal wavelength;

D is the physical distance between the two adjacent array elements, and in concrete physics practice process, the size of this physical distance d is traditionally arranged to be the half-wavelength of signal, but other numerical value belong to protection scope of the present invention too;

C is the light velocity;

F is a signal frequency.

Step s502, determine the computing formula of the shape-endowing weight value w (θ) on the specific direction.

According to formula (1) and formula (2), can further calculate by following formula for the weights of specific direction θ figuration:

w(θ)＝a ^H(θ)＝[a ₁(θ)a ₂(θ)…a _Ka(θ)] ^H (3)

By above-mentioned formula (3) as can be seen, the shape-endowing weight value w (θ) on the specific direction θ is specially the conjugate matrices of response vector a (θ), and H identifies by footmark.

Need be pointed out that further that the w (θ) that is calculated by above-mentioned formula (3) is the shape-endowing weight value of the wave beam on specific direction θ, the shape-endowing weight value of the business beam of promptly current smart antenna array on specific direction θ.

Wherein, the business beam parameter is different under the situation of directional intelligent antenna battle array and omnidirectional intelligent aerial array, and the former covers 120 ° of spatial domains, and the latter covers 360 ° of spatial domains.

Step S503, determine the angle of coverage range Theta of current smart antenna array _BCH

According to the coverage that the type (as: omnidirectional intelligent aerial array, directional intelligent antenna battle array) and the network configuration of smart antenna array are determined smart antenna array, promptly determine the angle of coverage θ of smart antenna array _BCHSpan.

Wherein, the special angle θ in aforementioned formula (1), formula (2) and the formula (3) and the angle of coverage θ of smart antenna array _BCHBetween relation as follows:

θ∈θ _BCH

In concrete enforcement scene, if current smart antenna array is an omnidirectional intelligent aerial array, angle of coverage θ then _BCHSpan be:

θ _BCH＝[-π，π]；

If three fan section intelligent antenna battle arrays, and current smart antenna array is omnidirectional intelligent aerial array, then angle of coverage θ _BCHSpan be:

${\mathrm{\&theta;}}_{\mathrm{BCH}}=[-\frac{\mathrm{\&pi;}}{3},\frac{\mathrm{\&pi;}}{3}].$

Step S504, determine angle sequence θ _Order

According to the requirement of network topology, cook up and form the needed directional angle sequence of different beams width θ _Order

Concrete, the account form of angle sequence is

Wherein, θ _OrderBe a sequence with N angle, the concrete value of parameter N can be provided with according to the requirement of network topology structure.

Further, angle sequence θ _OrderIn each matrix element θ _OrderWith previously described θ _BCHBetween the relation that exists as follows:

Wherein,

(i=1 ..., N) expression angle sequence θ _OrderIn sequence number be the matrix element of i.

Hence one can see that, angle sequence θ _OrderIn the quantity of the angle element that comprised be at θ _BCHSpan within, promptly require to select to determine according to concrete network topology structure and computational accuracy in the angle of coverage scope of current smart antenna array, the concrete value of above-mentioned N value does not influence protection scope of the present invention.

Need further be pointed out that; step S501 and step S502 describe is the computing formula of array response vector of smart antenna array and the computing formula constant current journey really of the shape-endowing weight value on the specific direction; step S503 and step S504 then are the flow processs that generates default angle sequence; there is not inevitable sequencing between these two flow processs; the step S505 that just is respectively follow-up provides the information of operation rule and parameter; therefore; above-mentioned two sequencings that flow process describes in this article; and two pairing numberings of flow process only are for convenience of explanation and the sign of carrying out; and do not represent sequencing, preferential which flow process of carrying out does not wherein influence protection scope of the present invention.

Step S505, initialization shape-endowing weight value w (θ).

That is,, be initialized as w with the pairing numerical value w of the broadcast wave bean shaping weights of this smart antenna array (θ) _Int(θ)=[0 0 ... 0] ^H

Step S506, calculating angle sequence θ _OrderIn angle Pairing weights

Concrete calculating process is to carry out according to the computing formula of the shape-endowing weight value w (θ) on the determined specific direction among the above-mentioned step S502, and wherein, the value of θ is according to determined angle sequence θ among the above-mentioned step S504 _OrderChoose.

That is, calculate θ according to the computing formula of the shape-endowing weight value w (θ) on the specific direction _OrderIn angle

Shape-endowing weight value w (θ) on the pairing direction.

Step S507, with the shape-endowing weight value result who calculates

With current shape-endowing weight value w _Int(θ) add up.

$w_{\mathrm{int}}=w_{\mathrm{int}}+w\left({\mathrm{\&theta;}}_{\mathrm{order}}^i\right)$

The angle of step S508, the current calculating of judgement

At angle sequence θ _OrderIn sequence number i whether equal θ _OrderIn angle total quantity N.

When

Sequence number i be not equal to θ _OrderIn angle total quantity N, during promptly less than N, execution in step S506 calculates the pairing weights of next angle value;

When

Sequence number i equal θ _OrderIn angle total quantity N the time, execution in step S509, loop ends.

Step S509, determine that current weights result of calculation is broadcast beam weight.

At this moment the weights that obtain needed broadcast beam are: w _BCH=w _Int

Need further be pointed out that; in the description of the above-mentioned embodiment of the invention; applied letter sign or parameter are based on all in this professional domain that the technical staff is existing to write custom or common rule is chosen; representing concrete art-recognized meanings respectively; on this basis; other that make based on the technological thought that the embodiment of the invention proposed change, and change the letter sign or parameter produced that other change and belong to protection scope of the present invention equally based on identical art-recognized meanings.

The technical scheme of the embodiment of the invention has the following advantages, because adopted a kind of generation method of broadcast beam weight of intelligent antenna array, the generative process of broadcast beam weight in the smart antenna array is oversimplified, unitized, in the manufacturing and layoutprocedure of smart antenna, need not again a large amount of storages because standard disunity and the weights data of a plurality of producers that can't be compatible, reached and reduced taking of data space, reduce design data and computational complexity in the systematic realizing program, the raising system generates the effect of the efficient of broadcast beam weight.

In order to further facilitate explanation, on the basis of technique scheme, the embodiment of the invention further provides angle sequence θ _OrderChoose example, the symmetry (wireless environment is identical with transmission conditions) of the wireless path of up link and down link obtains owing to smart antenna array high efficiency under many circumstances is based on, therefore, originally the angle Selection of choosing in the example is carried out according to symmetry principle equally, as follows, be that angle sequence in the three fan section intelligent antenna battle arrays (being the directional intelligent antenna battle array) is chosen example, according to symmetrical selection principle, wherein each angle value is with respect to 0 angle symmetry.

Angle sequence θ _OrderConcrete value as follows:

θ _order＝[-60 -46.5 -33 -28.875 -24.75 -20.625 -16.5 -12.375-8.25 -4.125 0 4.125 8.25 12.375 16.5 20.625 24.75 28.875 3346.5 60]。

Further, based on choosing of above-mentioned angle sequence, through obtaining corresponding broadcast wave bean shaping directional diagram as shown in Figure 7 after the resulting shape-endowing weight value processing of the technical scheme of embodiment of the invention proposition.After this broadcast beam is handled through figuration, broadcast beam intensity in+60 ° to-60 ° intervals has obtained tangible improvement, form main beam, all the other angles then weaken accordingly, avoided signal on all the other angles for the interference of main beam, thereby, can better realize the signal receiving function of smart antenna array.

Wherein, need to prove that the broadcast beam parameter is different under the situation of directional intelligent antenna battle array and omnidirectional intelligent aerial array: be divided into the gain of horizontal plane half-power beam width, broadcast beam in the directional intelligent antenna battle array, wave beam descends in the power level at ± 60 ° of edges; Omnidirectional intelligent aerial array is divided into the circularity index of the average gain and the horizontal radiation pattern of broadcast beam.

Accordingly, broadcast wave bean shaping directional diagram shown in Figure 7 is specially horizontal plane half-power beam width (Half Power Beam Width, HPBW) schematic diagram under the directional intelligent antenna battle array state.

Need be pointed out that further that above-mentioned angle sequence value only is a preferred embodiment of the present invention, and is different with transmission conditions at wireless environment, or network configuration there is under the situation of particular design needs above-mentioned angle sequence θ _OrderAlso can select asymmetrical angle value, such adjustment belongs to protection scope of the present invention equally.

The generation method of corresponding above-mentioned a kind of broadcast beam weight of intelligent antenna array that the embodiment of the invention proposed, the embodiment of the invention has further proposed a kind of generating apparatus of broadcast beam weight of intelligent antenna array, its structural representation specifically comprises as shown in Figure 8:

First determination module 81 is used for the array format according to smart antenna array, determines the computing formula of the array response vector of this smart antenna array, specifically comprises:

Quantity is obtained submodule 811, is used for obtaining the bay quantity of smart antenna array;

Determine submodule 812, obtain submodule 811 with quantity and be connected, be used for obtaining the bay quantity that submodule 811 is obtained, determine the computing formula of the array response parameter value of bay on specific direction in the smart antenna array according to quantity.

Processing module 82 is connected with first determination module 81, is used for the computing formula by first determination module, 81 determined array response vectors, determines the array response vector of each angle in the default angle sequence;

Generation module 83 is connected with processing module 82, is used for the array response vector by processing module 82 determined each angle of angle sequence, generates the broadcast beam weight of smart antenna array, specifically comprises:

Initial submodule 831 is used for the shape-endowing weight value of initialization intelligent antenna array;

Processing sub 832 is used for the array response vector according to default each angle of angle sequence, determines in the angle sequence pairing shape-endowing weight value on each angle;

Submodule 833 adds up, be connected with processing sub 832 with initial submodule 831, be used for the shape-endowing weight value after 831 initialization of initial submodule respectively with processing sub 832 determined each angle of angle sequence on pairing shape-endowing weight value circulate and add up;

Generate submodule 834, be connected with the submodule 833 that adds up, the shape-endowing weight value that the circulation that the submodule 833 that is used to determine to add up is carried out is generated after adding up and all finishing is the broadcast beam weight of smart antenna array.

Further, said apparatus also comprises:

Second determination module 84 is connected with processing module 82, is used to generate above-mentioned default angle sequence, promptly is used for definite angle sequence that generates the broadcast beam weight of this smart antenna array, and wherein, this module specifically comprises:

Information is obtained submodule 841, is used to obtain the type of smart antenna array and the information of network configuration;

First determines to obtain submodule 842 submodule 841 with information and to be connected, and is used for obtaining according to information the type and the network configuration of the smart antenna array that submodule 841 obtained, and determines the angle of coverage scope of the broadcast beam of smart antenna array;

Second determines submodule 843, determines that with first submodule 842 is connected, and is used for the angle of coverage scope according to the broadcast beam of first definite submodule 842 determined smart antenna arrays, determines to form the needed angle sequence of object beam width.

Further, said apparatus also comprises:

The 3rd determination module 85, be connected with first determination module 81, be used for computing formula according to the array response vector of first determination module, 81 determined smart antenna arrays, determine the computing formula of the shape-endowing weight value of smart antenna array on specific direction, then, this computing formula is offered processing module 82 and carry out subsequent treatment.

Above-mentioned module can be distributed in a device, also can be distributed in multiple arrangement.

Above-mentioned module can be merged into a module, also can further split into a plurality of submodules.

The technical scheme of the embodiment of the invention has the following advantages, because adopted a kind of generating apparatus of broadcast beam weight of intelligent antenna array, the generative process of broadcast beam weight in the smart antenna array is oversimplified, unitized, in the manufacturing and layoutprocedure of smart antenna, need not again a large amount of storages because standard disunity and the weights data of a plurality of producers that can't be compatible, reached and reduced taking of data space, reduce design data and computational complexity in the systematic realizing program, the raising system generates the effect of the efficient of broadcast beam weight.

Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by hardware, also can realize by the mode that software adds necessary general hardware platform.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions with so that computer equipment (can be personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.

It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, module in the accompanying drawing or flow process might not be that enforcement the present invention is necessary.

It will be appreciated by those skilled in the art that the module in the device among the embodiment can be distributed in the device of embodiment according to the embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from present embodiment.The module of the foregoing description can be merged into a module, also can further split into a plurality of submodules.

The invention described above embodiment sequence number is not represented the quality of embodiment just to description.

The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.

Claims (12)

1. the generation method of a broadcast beam weight of intelligent antenna array is characterized in that, specifically may further comprise the steps:

According to the array format of smart antenna array, determine the computing formula of the array response vector of described smart antenna array;

By the computing formula of described array response vector, determine the array response vector of each angle in the default angle sequence;

By the array response vector of each angle in the described angle sequence, generate the broadcast beam weight of described smart antenna array.

2. the method for claim 1 is characterized in that, described array format according to smart antenna array is determined to be specially the computing formula of the array response vector of described smart antenna array:

According to the bay quantity in the described smart antenna array, determine that the computing formula of the array response vector of described smart antenna array on specific direction is:

a(θ)＝[a ₁(θ)a ₂(θ)…a _Ka(θ)]，

Wherein, Ka represents the bay total quantity in the described smart antenna array, and θ represents described specific direction pairing angle value in the residing reference coordinate system of described smart antenna array, a _i(θ) (i=1 ..., Ka) the array response parameter value of i bay on specific direction θ in the described smart antenna array of expression.

3. method as claimed in claim 2 is characterized in that, described array format according to smart antenna array is determined also to comprise before the computing formula of array response vector of described smart antenna array:

Determine i the array response parameter value a of bay on specific direction θ in the described smart antenna array _iComputing formula (θ) is:

${\mathrm{\&alpha;}}_i\left(\mathrm{\&theta;}\right)=e^{j*\frac{2\mathrm{\&pi;}}{\mathrm{\&lambda;}}*d*(\mathrm{ka}-4.5)*\cos \left(\mathrm{\&theta;}\right)},$

Further, $\mathrm{\&lambda;}=\frac{c}{f},$

Wherein, i represents the sequence number of the bay in the described smart antenna array, and e represents math constant, j represents imaginary unit, and λ represents signal wavelength, and d represents the physical distance between two each adjacent bays in the described smart antenna array, c represents the light velocity, and f represents signal frequency.

4. method as claimed in claim 2 is characterized in that, described array format according to smart antenna array is determined also to comprise after the computing formula of array response vector of described smart antenna array:

According to the computing formula of the array response vector of described smart antenna array, determine that the computing formula of the shape-endowing weight value of described smart antenna array on described specific direction θ is:

w(θ)＝a ^H(θ)＝[a ₁(θ)a ₂(θ)…a _Ka(θ)] ^H。

5. the method for claim 1 is characterized in that, described default angle sequence specifically generates by following steps:

According to the type and the network configuration of described smart antenna array, determine the angle of coverage scope of the broadcast beam of described smart antenna array;

According to the angle of coverage scope of the broadcast beam of described smart antenna array, determine the needed angle sequence of described formation object beam width:

${\mathrm{\&theta;}}_{\mathrm{order}}=\left[\begin{array}{cccc}{\mathrm{\&theta;}}_{\mathrm{order}}^1& {\mathrm{\&theta;}}_{\mathrm{order}}^2& ...& {\mathrm{\&theta;}}_{\mathrm{order}}^N\end{array}\right].$

6. as claim 1 or 4 or 5 described methods, it is characterized in that described array response vector by each angle in the described angle sequence generates the broadcast beam weight of described smart antenna array, is specially:

The described shape-endowing weight value of initialization is w _Int(θ)=[0 0 ... 0] ^H

According to the array response vector of each angle in the described angle sequence, determine each angle in the described angle sequence

Go up pairing shape-endowing weight value

According to formula

(i=1......N), with the shape-endowing weight value after the described initialization respectively with described angle sequence in each angle

Go up pairing shape-endowing weight value

Carrying out N circulation adds up;

Determine the shape-endowing weight value that described N circulation adds up and generated after all finishing, be the broadcast beam weight w of described smart antenna array _BCH

7. the generating apparatus of a broadcast beam weight of intelligent antenna array is characterized in that, specifically comprises:

First determination module is used for the array format according to smart antenna array, determines the computing formula of the array response vector of described smart antenna array;

Processing module is connected with described first determination module, is used for the computing formula by the determined array response vector of described first determination module, determines the array response vector of each angle in the default angle sequence;

Generation module is connected with described processing module, is used for the array response vector by each angle of the determined angle sequence of described processing module, generates the broadcast beam weight of described smart antenna array.

8. device as claimed in claim 7 is characterized in that, described first determination module specifically comprises:

Quantity is obtained submodule, is used for obtaining the bay quantity of described smart antenna array;

Determine submodule, obtain submodule with described quantity and be connected, be used for obtaining the bay quantity that submodule obtains, determine the computing formula of the array response parameter value of bay on specific direction in the described smart antenna array according to described quantity.

9. device as claimed in claim 7 is characterized in that, also comprises:

Second determination module is connected with described processing determination module, is used for definite angle sequence that generates the broadcast beam weight of described smart antenna array.

10. device as claimed in claim 9 is characterized in that, described second determination module specifically comprises:

Information is obtained submodule, is used to obtain the type of described smart antenna array and the information of network configuration;

First determines to obtain submodule submodule with described information and to be connected, and is used for obtaining according to described information the type and the network configuration of the smart antenna array that submodule obtains, and determines the angle of coverage scope of the broadcast beam of described smart antenna array;

Second determines submodule, determines that with described first submodule is connected, and is used for the angle of coverage scope according to the broadcast beam of described first definite determined smart antenna array of submodule, determines the needed angle sequence of described formation object beam width.

11. device as claimed in claim 7 is characterized in that, also comprises:

The 3rd determination module, be connected with described first determination module, be used for computing formula, determine the computing formula of the shape-endowing weight value of described smart antenna array on described specific direction according to the array response vector of the determined smart antenna array of described first determination module.

12., it is characterized in that described generation module specifically comprises as any described device in the claim 7 to 11:

Initial submodule is used for the shape-endowing weight value of the described intelligent antenna array of initialization;

Processing sub is used for the array response vector according to each angle of the determined angle sequence of described second determination module, determines in the described angle sequence pairing shape-endowing weight value on each angle;

Submodule adds up, be connected with described processing sub with described initial submodule, be used for the shape-endowing weight value after the initialization of described initial submodule institute respectively with determined described each angle of angle sequence of described processing sub on pairing shape-endowing weight value circulate and add up;

Generate submodule, be connected, be used for determining the shape-endowing weight value that the described circulation that submodule carried out of adding up adds up and generated after all finishing, be the broadcast beam weight of described smart antenna array with the described submodule that adds up.

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