CN1768449A - Beam-forming method based on broadband antenna and its device - Google Patents

Abstract

A beamforming method based on broadband antenna is provided, comprising: detecting the frequency of input signals of an antenna; determining the effective antenna aperture between elements of the antenna array according to the detected frequency; computing the weight vector of each element of the antenna array to the signals according to the determined effective antenna aperture and the transmission function of the antenna array; multiplying the input signals with said weight vector of each element of the antenna array to the signals, combining them and outputting the beam signals. By performing weighting operation respectively to the input signals after a series of delaying operation, and then combining them, the single digital signals can be acquired. This effectively reduces the odds produced by the antenna between transmitting signals and receiving signals, and thus dramatically improves the communication quality.

Description

Beam form-endowing method and device thereof based on broad-band antenna

Technical field

The present invention relates to a kind of beam form-endowing method, relate in particular to a kind of beam form-endowing method based on broad-band antenna in frequency domain or time domain realization based on broad-band antenna.

Technical background

In common mobile communication environment, the signal between base station and the travelling carriage is to propagate along the some paths between the Receiver And Transmitter.Because the difference of propagation path, same signal is also different with arrival direction angle (DOA) along the propagation delay that different paths arrive receiver, thereby causes multipath to disturb and signal fadeout.

The array antenna technology can make full use of the spatial character of signal, reduces multipath effectively and disturbs and reduce signal fadeout, improves power system capacity and service quality significantly, has therefore obtained in practice using widely.

Wave beam forming is a basic function of array antenna, also be that array antenna can carry out time delay, weighting and merge to handle forming antenna beam to the received signal of bay, make the wave beam main lobe aim at the subscriber signal direction, aim at the interference signal direction and wave beam zero is fallen into, reach the purpose that suppresses interference.Therefore the wave beam of array antenna formation has fundamental influence to systematic function.

Fig. 1 is an one dimension linear array schematic diagram of being made up of M array element.As shown in Figure 1, θ is the incoming signal elevation angle, and d is array element distance (how much aperture), supposes that all array element distance equate.The wave beam half-power width θ of this aerial array so _0.5Be approximately

In the formula, M is the aerial array array number; F is a signal(-) carrier frequency; C is the light velocity, equals 3 * 10 ⁸M/s.

The geometry aperture d and the array number M of existing antenna are normally changeless, this means that aerial array length M d also is changeless.

From equation (1) as can be seen, under the constant situation of aerial array length M d, when receiving the signal of different frequency, antenna forms the wave beam of different in width.Signal frequency is high more, and beamwidth is narrow more.Studies have shown that beamwidth and frequency are inversely proportional to.When broadband signal not in the direction of beam position but when other direction receives, because antenna is narrow to the width of the wave beam of high-frequency signal, so the part high-frequency signal can drop on zero of antenna pattern and fall into, cause this part signal energy can be by this wave beam Out-Lost, therefore, the output of antenna is distortion.

In order to solve above-mentioned antenna output distortion problem, the invention provides a kind of beam form-endowing method based on broad-band antenna.

Summary of the invention

An object of the present invention is to provide a kind of beam form-endowing method based on broad-band antenna.In the method, change the effective aperture of antenna basic matrix at the unlike signal frequency, make antenna form the wave beam of permanent beamwidth to the unlike signal frequency, putting before this, calculate the weight vector of antenna at the unlike signal frequency, then input signal is weighted with the weight vector that calculates,, thereby has eliminated the phenomenon of the broadband signal distortion after handling with the spatial gain of balanced antenna to each signal frequency.

Another object of the present invention provides the beam form-endowing method and the device thereof of the permanent beamwidth in a kind of portable terminal with array antenna, use this method of reseptance and device thereof, can reduce the deviation that array element is produced effectively when transmitting and receiving signal, thereby significantly improve calling quality.

In order to realize above-mentioned purpose of the present invention,, comprise step: the frequency that detects antenna input signal according to a kind of beam form-endowing method of the present invention based on broad-band antenna; Determine the effective antenna aperature between the array element of aerial array according to the frequency that detects; According to the effective antenna aperature determined and the transfer function of aerial array, calculate the weight vector of each bay to this signal; Input signal and described each bay weight vector to this signal is multiplied each other, merge the beamformer output signal then.

In order to realize above-mentioned purpose of the present invention, according to a kind of beam form-endowing method based on broad-band antenna of the present invention, wherein, the step with input signal and corresponding weight vector multiply each other further comprises: input signal is carried out a series of time-delay; To multiply each other with corresponding weight vector respectively through each signal of time-delay, and merge each time delayed signal after the weighting.

In order to realize above-mentioned purpose of the present invention, according to a kind of beam form-endowing method of the present invention, wherein, also comprise step: before the frequency that detects antenna input signal based on broad-band antenna, carry out fast fourier transform earlier, so that input signal is converted to frequency-region signal; After the signal after each array element weighting of antenna is merged, carry out invert fast fourier transformation again, be converted to time-domain signal with the frequency-region signal that will merge.

In order to realize above-mentioned purpose of the present invention, according to a kind of beam size enlargement apparatus of the present invention based on broad-band antenna, comprise: effective antenna aperature computing module, be used to detect the frequency of antenna input signal, determine effective antenna aperature between the array element of aerial array according to the frequency that detects then; The weight vector computing module is used for calculating the weight vector of each bay to this signal according to the effective antenna aperature determined and the transfer function of aerial array; The wave beam generation module is used for input signal and described each bay weight vector to this signal is multiplied each other, and merges the beamformer output signal then.

In order to realize above-mentioned purpose of the present invention, according to a kind of beam size enlargement apparatus based on broad-band antenna of the present invention, wherein, the wave beam generation module further comprises: organize delayer, each group delayer wherein is used for input signal is carried out a series of time-delay more; Many group weights adjustment modules, each group weights adjustment module wherein are used for and will multiply each other with corresponding described weight vector respectively through each signal of time-delay; Wave beam merges module, is used for the signal after the weighting is merged, and the signal after the output merging.

In order to realize above-mentioned purpose of the present invention, according to a kind of beam size enlargement apparatus of the present invention based on broad-band antenna, wherein, also comprise: the time/the frequency modular converter, be used for antenna input signal is carried out fast fourier transform, offer described effective antenna aperature computing module with the signal that will become behind the frequency domain; Frequently/time modular converter, the frequency domain beam signal that is used for described wave beam generation module is merged output carries out invert fast fourier transformation, to obtain the time-domain wave beam signal.

The accompanying drawing summary

Fig. 1 is the schematic diagram of an existing discrete linear antenna arrays;

Fig. 2 is the schematic diagram that resamples according to space of the present invention;

Fig. 3 is according to a kind of wave beam forming block diagram based on broad-band antenna of the present invention;

Fig. 4 is according to a kind of block diagram of realizing in time domain based on the launching beam size enlargement apparatus of broad-band antenna of the present invention;

Fig. 5 is according to a kind of block diagram of realizing at frequency domain based on the launching beam size enlargement apparatus of broad-band antenna of the present invention;

Fig. 6 is according to a kind of block diagram of realizing in time domain based on the received beam size enlargement apparatus of broad-band antenna of the present invention.

Fig. 7 is according to a kind of block diagram of realizing at frequency domain based on the received beam size enlargement apparatus of broad-band antenna of the present invention;

Detailed Description Of The Invention

From aforesaid equation (1) as can be seen, the size of how much aperture d by changing antenna can obtain the antenna beam of different beams width; For different signal frequency f,, make wave beam half-power width θ by changing the size of antenna aperature d _0.5Invariable, can obtain the wave beam of permanent beamwidth.

The beam form-endowing method that the present invention proposes just is based on above-mentioned principle, by changing effective antenna aperature of unlike signal frequency, make antenna form the wave beam of permanent beamwidth to the unlike signal frequency, putting before this, calculate the weight vector of antenna at the unlike signal frequency, then input signal is weighted with the weight vector that calculates, with the spatial gain of balanced antenna each signal frequency.

Below in conjunction with accompanying drawing, classify the handling process that example is described this beam form-endowing method in detail as with a filled array.

At first, when the signal frequency that is input to bay from original frequency f ₀Become frequency f _jThe time, identical for the width that makes antenna beam under these two frequencies, be listed as with the effective aperture of guaranteeing it from d=λ at this bay position resampling filled array ₀/ 2 become d '=λ _j/ 2.Fig. 2 is the schematic block diagram that the space resamples.As shown in Figure 2, d is that array element 2 is corresponding to original frequency f ₀The effective aperture, the array element 2 ' that d ' obtains for sampling corresponding to frequency f _jThe effective aperture.

Then, can be used as a digital filter as a discrete antenna array, filled array row can be used as an analog filter, and its transfer function can be used equation (2) expression:

$h_a\left(x\right)=\underset{i=1}{\overset{M}{\mathrm{\Σ}}}[w_0\left(i\right)\·\frac{\sin (\mathrm{\π}(x-(i-1)\frac{{\mathrm{\λ}}_j}{2})/\frac{{\mathrm{\λ}}_j}{2})}{\mathrm{\π}(x-(i-1)\frac{{\mathrm{\λ}}_j}{2})}]...\left(2\right)$

In the formula: w ₀(i) be corresponding original frequency f ₀Weights, λ _jBe respective frequencies f _jWavelength, x is the distance with the 1st bay (reference point).From this transfer function as can be seen, each bay is to the influence and the original frequency f of input signal ₀Corresponding weight vector w ₀(i), bay and the 1st bay apart from x, and the wavelength of input signal is relevant.

Then, according to new array element 2 ' effective antenna aperature, and the transfer function of filled array row calculates each bay corresponding to frequency f _jWeight vector.The calculating of this weight vector is provided by equation (3):

$w_j\left(m\right)\≈\frac{f_j}{f_0}\underset{i=1}{\overset{M}{\mathrm{\Σ}}}[w_0\left(i\right)\·\frac{\sin \left\{\mathrm{\π}\right[\frac{f_j}{f_0}(m-1)-(i-1)\left]\right\}}{\mathrm{\π}[\frac{f_j}{f_0}(m-1)-(i-1)]}]m=\mathrm{1,2},..M,i\≠m...\left(3\right)$

At last, the weight vector that input signal and aforementioned calculation obtain multiplies each other, and merges output by combiner again, just obtains the wave beam of permanent beamwidth.

Fig. 3 is a kind of beam size enlargement apparatus block diagram based on broad-band antenna, comprising: an effective antenna aperature computing module 10, be used to detect the frequency of antenna input signal X (t), determine effective antenna aperature between the array element of aerial array according to the frequency that detects then; Also comprise a weight vector computing module 20, be used for calculating the weight vector of each bay this signal according to the effective antenna aperature determined and the transfer function of aerial array; With a wave beam generation module 30, be used for antenna input signal X (t) is multiplied each other with the weight vector of described each bay to this signal, merge beamformer output signal Y (t) then.

Above-mentioned effective antenna aperature computing module 10, weight vector computing module 20 and wave beam generation module 30 can be realized by computer software, also can be realized by computer hardware.

With the lower part, will and be sent as example with the reception of signal, above-mentioned beam size enlargement apparatus and the method concrete application in time domain and frequency domain respectively thereof based on broad-band antenna are described.

Fig. 4 is a kind of launching beam size enlargement apparatus block diagram of realizing in time domain based on broad-band antenna, comprising: effective antenna aperature computing module 10, weight vector computing module 20 and wave beam generation module 30.

As shown in Figure 4, effectively antenna aperature computing module 10 at first detects the frequency of each time-domain signal that will launch, determines that according to the frequency that detects the effective antenna aperature between the array element of aerial array is d=λ _j/ 2, weight vector computing module 20 calculates the weight vector of each bay according to effective antenna aperature of determining then, last wave beam generation module 30 multiplies each other each time-domain signal and the weight vector that calculates, the beam signal (Y of the permanent beamwidth of synthetic output multichannel ₁... Y _m... Y _M).

Fig. 5 is a kind of launching beam size enlargement apparatus block diagram of realizing at frequency domain based on broad-band antenna, comprising: effective antenna aperature computing module 10, weight vector computing module 20, wave beam generation module 30, Fourier transform module 40 and inverse Fourier transform module 50.

As shown in Figure 5, Fourier transform module 40 at first is transformed into frequency-region signal to the time-domain signal that each will be launched; Effectively antenna aperature computing module 10 detects the frequency of the frequency-region signal after each conversion then, determines that according to the frequency that detects the effective antenna aperature between the array element of aerial array is d=λ _j/ 2; Weight vector computing module 20 calculates the weight vector of each bay according to effective antenna aperature of determining; Then wave beam generation module 30 multiplies each other each frequency-region signal and the weight vector that calculates, the frequency domain beam signal of the permanent beamwidth of synthetic output multichannel; Last inverse Fourier transform module 50 converts each road frequency domain beam signal to time-domain signal (Y ₁... Y _m... Y _M).

Fig. 6 is a kind of received beam size enlargement apparatus block diagram of realizing in time domain based on broad-band antenna, comprising: effective antenna aperature computing module 10, weight vector computing module 20, the mountain is organized delayer 60 and many group weights adjustment modules 70 and wave beam more and is merged the wave beam generation module 30 that module 80 constitutes.

As shown in Figure 6, effectively antenna aperature computing module 10 at first detects the time-domain signal (X that each bay receives ₁... X _m... X _M) frequency, determine that according to the frequency that detects the effective antenna aperature between the array element of aerial array is d=λ _j/ 2, weight vector computing module 20 calculates the weight vector of each bay according to effective antenna aperature of determining then, many group delayers 60 carry out delay process to each time-domain signal that receives, the weight vector that many group weights adjustment module 70 usefulness weight vector computing modules 20 calculate, time-domain signal after each delay process is weighted processing, and last wave beam merges module 80 will synthesize the beam signal of permanent beamwidth through each time-domain signal of weighted.

Describe the course of work of this device below in detail:

1, effectively antenna aperature and weights calculate

At first effectively antenna aperature computing module 10 detects the frequency of input baseband digital signals, determines that according to the frequency that detects the effective antenna aperature between the array element of aerial array is d=λ _j/ 2; In weights computing module 20,, calculate weight vector then according to effective antenna aperature of determining, concrete:

(1) when broadband signal is known waveform, thereby its spectral range also is known, its impulse response in an array element of this basic matrix be h ' (n); If broadband signal is unknown, then need according to input signal, adopt methods such as FFT (Fourier transform), time frequency analysis to estimate its spectral range, to determine that it is at the impulse response h ' of an array element of this basic matrix (n).

(2) when the caused deviation of array element receiving wide-band signal of array antenna is eliminated, the weights coefficient h _Mn(or be expressed as h _m(n)) should satisfy (4) formula (not considering channel effect):

Y (t)=x (t)=x (t)  h ' is  h (n) _m(n) (4) wherein,  represents the time domain convolution;

(3) obtain weight coefficient h by formula (4) _N=h _Mn(m=1 ..., M), h wherein _NRepresent the weight coefficient of some array element in time-domain, its effective aperture with antenna is relevant.

(4) determine weight coefficient h _M, by for example Chebyshev (Chebyshev) or Butterworth (Butterworth) weighting, with the beam shape that obtains to be scheduled to, weight coefficient h wherein _MThe weight coefficient of all array elements of expression synchronization.

(5) by weight coefficient h _MAnd h _N, determine the weights coefficient h _Mn

h _mn＝h _·n×h _m· (5)

Each weights coefficient h that (6) will generate _MnOffer respectively and respectively organize weights adjustment module 70.

2, weighting

Input signal is carried out time delays, τ by Fig. 6 device _m=(m-1) d/csin (α ₀), τ _mBeing the time delay with respect to reference point, is α in order to form the sensing angle ₀Wave beam, T _sBe delay unit, can adopt 1 sampling interval.Through each signal after a series of time-delays, each weights multiplication that provides with above-mentioned weight vector computing module 20 respectively is with the multibeam signals that obtains crossing through the Space Time two-dimensional process.

3, merge

Each road signal data through weighting is carried out superposition in wave beam merging module 80, to obtain the single channel digital signal of permanent beamwidth.

Fig. 7 is a kind of received beam size enlargement apparatus block diagram of realizing at frequency domain based on broad-band antenna.Wherein, x _m(t) be the time domain input signal of m passage, X _Bk(f) be that deflection is α _kThe frequency domain output of k wave beam, x _Bk(t) be last time domain output, K is the sum of the wave beam of formation, B _Mk(f _j) be transformation matrix, the expression of its available equation (6):

$B\left(f_j\right)=W_j{\left(W_j^H{W}_j\right)}^{-\frac{1}{2}}...\left(6\right)$

In the formula: W _j=[w _J1, w _J2... w _Jk... w _JK], w _JkIt is the weight vector of k wave beam.By equation (3) is calculated w _JkCan represent with equation (7):

$w_{\mathrm{jk}}=$

$\mathrm{diag}[1,e^{-j2\mathrm{\π}{f}_j(d/c)\sin \left({\mathrm{\α}}_k\right)}...e^{-j2\mathrm{\π}{f}_j(d/c)\sin \left({\mathrm{\α}}_k\right)(m-1)}...e^{-j2\mathrm{\π}{f}_j(d/c)\sin \left({\mathrm{\α}}_k\right)(M-1)}]\×w_{j0}...\left(7\right)$

$=\mathrm{diag}(\∂(f_j,{\mathrm{\α}}_k))\×w_{j0}$

As shown in Figure 7, the input signal x of time domain _m(t) at first carry out fast Fourier transform to convert frequency-region signal to, effectively antenna aperature computing module 10 detects the frequency of the frequency-region signal that obtains then, determines that according to the frequency that detects the effective antenna aperature between the array element of aerial array is d=λ _j/ 2; Then weight vector computing module 20 calculates the weight vector of each bay to this signal according to the effective antenna aperature determined and the transfer function of aerial array, and the weight vector that calculates is offered the transformation matrix of each passage; Each road frequency-region signal multiplies each other with the transformation matrix of place passage respectively and computes weighted, and produces a plurality of frequency domain beam signals by a plurality of signal combiners are synthetic; By inverse fast Fourier transform the frequency domain beam signal is converted to the beam signal of time domain at last.

Beneficial effect

As mentioned above, when the signal frequency that is input to bay from original frequency f ₀Become frequency f _jThe time, identical for the width of the antenna beam that makes these two frequency correspondences, the array antenna of sampling again in this bay position with the effective aperture of guaranteeing it from d=λ ₀/ 2 become d '=λ _j/ 2, the transfer function of the row of effective antenna aperature of the new array element of basis, and filled array then calculates corresponding to frequency f _jWeight vector, input signal and this weight vector multiply each other, and just can obtain the wave beam output of permanent beamwidth, have therefore eliminated the distortion phenomenon of handling the back broadband signal.

In addition, the beam form-endowing method and the device thereof of above-mentioned permanent beamwidth are applied in the portable terminal with array antenna, by the input signal after a series of time-delays of process is weighted processing respectively, and will obtain the single digital signal through the merging after the Space Time two dimension weighted, reduce the deviation that array element is produced effectively when transmitting and receiving signal, improved speech quality significantly.

Those skilled in the art are to be understood that, beam form-endowing method and device thereof based on broad-band antenna provided by the present invention are applicable to that broadband wireless transmits and receives system, next generation's (the 3rd generation and the 4th generation) base station and portable terminal of communication system, the chipset that is applied to array antenna and broad-band antenna and assembly.

It will be appreciated by those skilled in the art that beam form-endowing method and the device thereof based on broad-band antenna disclosed in this invention, can also on the basis that does not break away from content of the present invention, make various improvement.Therefore, protection scope of the present invention should be determined by the content of appending claims.

Claims (17)

1, a kind of beam form-endowing method based on broad-band antenna comprises step:

Detect the frequency of antenna input signal;

Determine the effective antenna aperature between the array element of aerial array according to the frequency that detects;

According to the effective antenna aperature determined and the transfer function of aerial array, calculate the weight vector of each bay to this signal;

Input signal and described each bay weight vector to this signal is multiplied each other, merge the beamformer output signal then.

2, the beam form-endowing method based on broad-band antenna as claimed in claim 1, wherein, the described step that input signal and corresponding weight vector are multiplied each other further comprises:

Input signal is carried out a series of time-delay;

To multiply each other with corresponding weight vector respectively through each signal of time-delay, and merge each time delayed signal after the weighting.

3, the beam form-endowing method based on broad-band antenna as claimed in claim 1 wherein, also comprises step:

Before the frequency that detects antenna input signal, carry out fast fourier transform earlier, so that input signal is converted to frequency-region signal;

After the signal after each array element weighting of antenna is merged, carry out invert fast fourier transformation again, be converted to time-domain signal with the frequency-region signal that will merge.

4, as claim 1,2 or 3 described beam form-endowing methods based on broad-band antenna, wherein, the effective antenna aperature between the described array element is d=λ/2, and wherein λ is the wavelength of described input signal.

5, as claim 1,2,3 or 4 described beam form-endowing methods, by one of them is carried out in base station and the portable terminal based on broad-band antenna.

6, a kind of beam size enlargement apparatus based on broad-band antenna comprises:

An effective antenna aperature computing module is used to detect the frequency of antenna input signal, determines effective antenna aperature between the array element of aerial array according to the frequency that detects then;

A weight vector computing module is used for calculating the weight vector of each bay to described input signal according to the effective antenna aperature determined and the transfer function of aerial array;

A wave beam generation module is used for described input signal and described each bay weight vector to this signal is multiplied each other, and merges the beamformer output signal then.

7, the beam size enlargement apparatus based on broad-band antenna as claimed in claim 6, wherein, described wave beam generation module further comprises:

Many group delayers, each group delayer wherein is used for input signal is carried out a series of time-delay;

Many group weights adjustment modules, each group weights adjustment module wherein are used for and will multiply each other with corresponding described weight vector respectively through each signal of time-delay;

A wave beam merges module, is used for the signal after the weighting is merged, and the signal after the output merging.

8, the beam size enlargement apparatus based on broad-band antenna as claimed in claim 6 wherein, also comprises:

In the time of one/and the frequency modular converter, be used for antenna input signal is carried out fast fourier transform, offer described effective antenna aperature computing module with the signal that will become behind the frequency domain;

One frequency/time modular converter, the frequency domain beam signal that is used for described wave beam generation module is merged output carries out invert fast fourier transformation, to obtain the time-domain wave beam signal.

9, as claim 6,7 or 8 described beam size enlargement apparatus based on broad-band antenna, wherein, the effective antenna aperature between the described array element is d=λ/2, and wherein λ is the wavelength of described input signal.

10, a kind of base station system comprises:

A wireless signal transceiver module is used for receiving or sending wireless signal;

An effective antenna aperature computing module is used for the frequency of base stations detected antenna input signal, determines effective antenna aperature between the array element of base-station antenna array according to the frequency that detects then;

A weight vector computing module is used for according to the effective antenna aperature determined and the transfer function of aerial array, and each bay of calculation base station is to the weight vector of described input signal;

A wave beam generation module is used for described input signal and each bay of described base station weight vector to this signal is multiplied each other, and merges the beamformer output signal then.

11, base station system as claimed in claim 10, wherein, described wave beam generation module further comprises:

Many group delayers, each group delayer wherein is used for input signal is carried out a series of time-delay;

Many group weights adjustment modules, each group weights adjustment module wherein are used for and will multiply each other with corresponding described weight vector respectively through each signal of time-delay;

A wave beam merges module, is used for the signal after the weighting is merged, and the signal after the output merging.

12, base station system as claimed in claim 10 wherein, also comprises:

In the time of one/and the frequency modular converter, be used for the antenna for base station input signal is carried out fast fourier transform, offer described effective antenna aperature computing module with the signal that will become behind the frequency domain;

One frequency/time modular converter, the frequency domain beam signal that is used for described wave beam generation module is merged output carries out invert fast fourier transformation, to obtain the time-domain wave beam signal.

13, as claim 10,11 or 12 described base station systems, wherein, the effective antenna aperature between the described array element is d=λ/2, and wherein λ is the wavelength of described input signal.

14, a kind of portable terminal comprises:

A wireless signal transceiver module is used for receiving or sending wireless signal;

An effective antenna aperature computing module is used to detect the frequency of mobile terminal antenna input signal, determines effective antenna aperature between the array element of mobile terminal antenna array according to the frequency that detects then;

A weight vector computing module is used for according to the effective antenna aperature determined and the transfer function of aerial array, calculates the weight vector of each bay of portable terminal to described input signal;

A wave beam generation module is used for described input signal and each bay of described portable terminal weight vector to this signal is multiplied each other, and merges the beamformer output signal then.

15, as portable terminal as described in the claim 14, wherein, described wave beam generation module further comprises:

Many group delayers, each group delayer wherein is used for input signal is carried out a series of time-delay;

Many group weights adjustment modules, each group weights adjustment module wherein are used for and will multiply each other with corresponding described weight vector respectively through each signal of time-delay;

A wave beam merges module, is used for the signal after the weighting is merged, and the signal after the output merging.

16, as portable terminal as described in the claim 14, wherein, also comprise:

In the time of one/and the frequency modular converter, be used for the mobile terminal antenna input signal is carried out fast fourier transform, offer described effective antenna aperature computing module with the signal that will become behind the frequency domain;

One frequency/time modular converter, the frequency domain beam signal that is used for described wave beam generation module is merged output carries out invert fast fourier transformation, to obtain the time-domain wave beam signal.

17, as portable terminal as described in the claim 14,15 or 16, wherein, the effective antenna aperature between the described array element is d=λ/2, and wherein λ is the wavelength of described input signal.

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