CN105743555B - One kind divides formula distribution antenna launching beam to optimize forming method - Google Patents

One kind divides formula distribution antenna launching beam to optimize forming method Download PDF

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Publication number
CN105743555B
CN105743555B CN201610185886.0A CN201610185886A CN105743555B CN 105743555 B CN105743555 B CN 105743555B CN 201610185886 A CN201610185886 A CN 201610185886A CN 105743555 B CN105743555 B CN 105743555B
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transmitting
antenna
base band
signal
band components
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CN201610185886.0A
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CN105743555A (en
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周渊平
范永胜
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四川大学
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0452Multi-user MIMO systems

Abstract

The invention discloses one kind, and formula distribution antenna launching beam to be divided to optimize forming method, mainly solves the problems such as prior art complexity is high, stability is poor, realization is inconvenient.Divide formula distribution antenna launching beam to optimize forming method, is as follows:(1)Every transmitting antenna corresponds to a transmitting branch, and each transmitting branch inputs baseband signal;(2)Baseband signal is decomposed into I/Q base band components;(3)I/Q base band components are sent out after radio-frequency modulations and amplification by transmitting antenna;(4)Receiving terminal feedback information optimizes and revises I/Q base band components to transmitting terminal, according to feedback information;(5)The I/Q base band components of each transmitting branch are after multiple iteration optimization, radio-frequency modulations, amplification, transmitting, feedback adjustment so that the modulated signal of transmitting finally realizes that phase is consistent, is consequently formed launching beam in receiving terminal;Step(4)In optimize and revise the methods of I/Q base band components and be:Adjustment only carries out on a transmitting antenna each time, and adjustment finishes the lower antenna of rear steering and adjusts in succession, and cycle carries out incessantly successively.

Description

One kind divides formula distribution antenna launching beam to optimize forming method

Technical field

The present invention relates to antenna launching beams to form technical field, in particular to one kind dividing formula distribution antenna Launching beam optimizes forming method.

Background technology

In order to enable the virtual antenna array that the transmitting antenna of discrete distribution is formed on geographical location can be with distant place Receiver carries out reliable and stable communication, and wherein core technology point is that the radiofrequency signal of each transmitting antenna in virtual antenna array exists Receiving terminal realizes that phase is consistent.

In the prior art, the radiofrequency signal for each transmitting antenna in realization virtual antenna array realizes phase one in receiving terminal The technical solution of cause is using feedback randomized method, specifically:First, in all hairs of distributed virtual aerial array It penetrates on antenna and adds the random perturbation phase value of one group of radiofrequency signal;Then, all transmitting antennas of transmitting terminal emit same simultaneously One frequency but the different radiofrequency signal of phase are to receiving terminal;Receiving terminal feeds back a binary system Xin Xi Give hair after receiving signal End is penetrated, instruction received signal strength is to increase or reduce.Thus the transmitting antenna of transmitting terminal decides whether to retain this transmitting The random perturbation phase value of antenna node retains existing disturbance phase value, and basic herein if received signal strength increases Upper continuation adds one group of new random perturbation phase value and carries out new round adjustment again, then emits signal;If received signal strength Reduce, then ignore this disturbance phase value, return to last round of phase value, then adds one group of new random perturbation phase again Place value starts next round adjustment, then emits signal.It so continues, each transmitting antenna received is just realized in receiver end Radiofrequency signal phase is almost the same, makes the enhancing of the intensity maximum of reception signal, that is, is receiving extreme direction realization launching beam shape At.

Disadvantage of the existing technology is as follows:(1) since random perturbation phase process needs to undergo adjustment repeatedly, ability So that each transmitting antenna signal is realized that phase is consistent in receiver end, constantly abandons invalid phase adjustment value therebetween, cause to adjust The convergence rate of overlong time, launching beam is slower.(2) all on all transmit antennas due to random perturbation phase each time It is changed, therefore processing work amount is big, it is higher to processor requirement, increase the complexity and cost of system.(3) emit day Line number amount is more, and convergence rate is slower.(4) since random perturbation phase process carries out in radiofrequency signal, high frequency component is past Poor toward there are stability, the big problem of adjustment difficulty is easy to cause the defects of system performance is inferior, realizability is poor.

Invention content

It is an object of the invention to overcome drawbacks described above, provide a kind of system complexity is low, stability is high, Wave beam forming receive Hold back fireballing point of formula distribution antenna launching beam optimization forming method.

To achieve the goals above, the technical solution adopted by the present invention is as follows:

One kind divides formula distribution antenna launching beam to optimize forming method, includes the following steps:

(1) every transmitting antenna corresponds to a transmitting branch, and each transmitting branch inputs baseband signal;

(2) baseband signal is decomposed into I/Q base band components;

(3) I/Q base band components are sent out after radio-frequency modulations and amplification by transmitting antenna;

(4) receiving terminal feedback information optimizes and revises I/Q base band components to transmitting terminal according to feedback information;

(5) the I/Q base band components of each transmitting branch are by multiple iteration optimization, radio-frequency modulations, amplification, transmitting, feedback After adjustment so that the modulated signal of transmitting finally realizes that phase is consistent, is consequently formed launching beam in receiving terminal;

Wherein, the method for I/Q base band components being optimized and revised in the step (4) is:Adjustment only emits at one each time It is carried out on antenna, adjustment finishes the lower antenna of rear steering and adjusts in succession, and cycle carries out incessantly successively.

Further, optimization algorithm is formed using point formula launching beam in the step (4) and optimizes and revises I/Q base band point Amount, the algorithm are as follows:

IfThe in-phase component at kth moment that is respectively baseband signal s (t) on n-th transmitting antenna The amplitude of I and quadrature component Q;

Corresponding random real number value conduct is arranged for the random N number of antenna for sending array, in (- 1,1) section in (4-1)Initial value, wherein n=0,1 ..., N-1;

(4-2) enables h0(0)=1 it is feedback iteration regulation coefficient initial value value, n=0, k=0,It counts one by one It calculatesWherein, Δ0For constant, according to eachValue, on N root transmitting antennas Send common signal s (t) simultaneously;

(4-3) then carries out step (4-5) if n=0, k=0, otherwise, is determined according to the feedback information from receiving terminal Feedback iteration regulation coefficient hn(k) value is as follows:

Wherein, ξ is real number, and 0<ξ<1;

(4-4) is according to formula material calculation:

(4-5) is calculated and is updatedValue:

It calculates and updatesValue:

According to eachValue sends signal s (t) simultaneously on N root transmitting antennas;

(4-6) ifThen then k → k+1 carries out step (4-7);Otherwise, k → k+1, so After return to step (4-3).(ε is an arbitrarily small positive real number)

(4-7) is if n<N-1 updates n → n+1;Otherwise, n → 0, and h is setn(k)=1 and

(4-8) cycle executes step step (4-3)-step (4-7), until the modulated signal of transmitting is final in receiving terminal Realize that phase is consistent.

Further, receiver, the I/Q base band components obtained using transmitting terminal are set in transmitting terminalAs the weights for receiving signal, is thus generated in the transmitting terminal and receive wave beam.It, can by above-mentioned technological means Using sameValue, which generates, receives wave beam, to resist interference, improves Signal to Interference plus Noise Ratio, improves acceptance Energy.

Further, the specific method is as follows in the step (5):

After (5-1) optimizes and revises s (t) and step (4)It is multiplied respectively and obtains I and Q two Updated baseband signal component;

(5-2) two baseband signal components are multiplied to obtain two modulated signals with high-frequency signal;

(5-3) obtains signal all the way after being added two modulated signals;

(5-4) signal it is filtered and amplification after launched by transmitting antenna.

Compared with prior art, the beneficial effects of the present invention are:

(1) divide journey thought invention introduces combination base band adjustment, use single-antenna cyclic and optimize and revise mode, more The I/Q amplitudes of new baseband signal, i.e., adjustment update only carries out on single transmitting antenna every time, after adjustment, turns to next A transmitting antenna adjusts in succession, and adjustment renewal process recycles propulsion successively.Compared to the prior art, the present invention has system complex Spend the advantages that low, stability is high, realizability is high, Wave beam forming fast convergence rate.

(2) complicated multiple antennas adjustment renewal process is broken down into simple single antenna and adjusts renewal process by the present invention, System processing complexity is set to be greatly lowered, antenna amount is more, and advantage of the present invention in terms of convergence rate and complexity is got over Obviously.

Description of the drawings

Fig. 1 is that distributing type multi-transmitting penetrates antenna system.

Fig. 2 is the systematic schematic diagram of the present invention.

Fig. 3 is a two transmitting antenna systems.

Specific implementation mode

The invention will be further described below in conjunction with the accompanying drawings.Embodiments of the present invention include but not limited to following implementation Example.

Embodiment

As shown in Figure 1, it is the wireless communication system of a transmitting antenna with multiple distributions discrete on geographical location System, i.e. transmitting terminal configure more antennas, and receiving terminal configures an antenna.In Fig. 1, Tn(n=0,1 ..., N-1) indicate n-th Root transmitting antenna.Based on above system, one is present embodiments provided in baseband signal in the same direction and quadrature component I/Q amplitudes Carry out single-antenna cyclic optimize and revise, newer technical solution, the technical solution realization principle is as follows:Pass through base band in transmitting terminal Signal processing with optimize and revise realize it is consistent in each road radiofrequency signal phase of receiving terminal, keep the received signal strength of receiving terminal excellent Change enhancing, Wave beam forming is realized receiving extreme direction.

Unlike the prior art, the present embodiment uses base band signal process means, rather than in radio frequency or high frequency It is directly operated in section, finally realizes each road radiofrequency signal phase alignment, form launching beam.Since base band signal process stabilization can It leans on, it is easy to implement, therefore the stability of system is more preferable, realizability higher.

The prior art needs on all transmitting antennas while adjusting update every time, and the present embodiment is different, this Embodiment introduces point journey thought adjusted in conjunction with base band, uses single-antenna cyclic and optimizes and revises mode, updates baseband signal I/Q amplitudes, i.e., every time adjustment update only is carried out on single transmitting antenna, adjustment renewal process recycle propulsion successively.This reality Apply example by above-mentioned technological means by complicated multiple antennas adjust renewal process be broken down into simple single antenna adjust it is updated Journey so that system processing complexity is greatly lowered, therefore shortens renewal time, accelerates convergence rate.

Based on above-mentioned, one kind point formula distribution antenna launching beam optimization forming method is present embodiments provided, specifically such as Under:(1) every transmitting antenna corresponds to a transmitting branch, and each transmitting branch inputs baseband signal;(2) baseband signal is decomposed For I/Q base band components;(3) I/Q base band components are sent out after radio-frequency modulations and amplification by transmitting antenna;(4) receiving terminal feedback letter For breath to transmitting terminal, transmitting terminal optimizes and revises I/Q base band components according to feedback information;(5) the I/Q base band components warp of each transmitting branch After crossing multiple iteration optimization, radio-frequency modulations, amplification, transmitting, feedback adjustment so that the modulated signal of transmitting is final in receiving terminal It realizes that phase is consistent, launching beam is consequently formed;Wherein, the method for I/Q base band components being optimized and revised in the step (4) is: Adjustment only carries out on a transmitting antenna each time, and adjustment finishes the lower antenna of rear steering and adjusts in succession, successively uninterruptedly Ground cycle carries out.

Fig. 2 shows the system principle diagrams for realizing above-mentioned technical proposal, if the shared N roots of system are discrete on geographical location The transmitting antenna of distribution, T0,T1......,TN-1, every antenna one transmitting branch of correspondence, the input base band of each transmitting branch Signal is s (t).Signal s (t) is broken down into two base band components of I and Q, i.e. I/Q amplitudes, after radio-frequency modulations and amplification, send to Transmitting antenna is sent.The optimized adjustment of I/Q base band components of each transmitting branch makes the modulated signal that it emits receive End has suitable phase, therefore the modulated signal of each transmitting branch transmitting is made finally to realize that phase is consistent in receiving terminal, thus Wave beam is formed, that is, the signal energy emitted reaches maximum in reception extreme direction.

In the present system, Wave beam forming performance depends on the adjustment of transmitting branch I/Q base band components.This system is according to coming from The feedback information of receiving terminal directly controls and optimizes and revises I/Q base band components, is a key of the present patent application, optimizes and revises I/Q base band components are as follows using formula launching beam formation algorithm is divided:

IfThe in-phase component at kth moment that is respectively baseband signal s (t) on n-th transmitting antenna The amplitude of I and quadrature component Q;

Corresponding random real number value conduct is arranged for the random N number of antenna for sending array, in (- 1,1) section in (4-1)Initial value, wherein n=0,1 ..., N-1;

(4-2) enables h0(0)=1 it is feedback iteration regulation coefficient initial value value, n=0, k=0,It counts one by one It calculatesWherein, Δ0For constant, according to eachValue, on N root transmitting antennas Send common signal s (t) simultaneously;

(4-3) then carries out step (4-5) if n=0, k=0, otherwise, is determined according to the feedback information from receiving terminal Feedback iteration regulation coefficient hn(k) value is as follows:

Wherein, ξ is real number, and 0<ξ<1;

(4-4) is according to formula material calculation:

(4-5) is calculated and is updatedValue:

It calculates and updatesValue:

According to eachValue sends signal s (t) simultaneously on N root transmitting antennas;

(4-6) ifThen then k → k+1 carries out step (4-7);Otherwise, k → k+1, so After return to step (4-3).(ε is an arbitrarily small positive real number)

(4-7) is if n<N-1 updates n → n+1;Otherwise, n → 0, and h is setn(k)=1 and

(4-8) cycle executes step step (4-3)-step (4-7), until the modulated signal of transmitting is final in receiving terminal Realize that phase is consistent.

The present embodiment is carried out using the adjustment process substep of I/Q base band components, and adjustment is only enterprising in an antenna each time Row, then turns to next antenna and continues to adjust, and cycle promotes in this way, to be divided complicated multiple antennas adjustment renewal process Solution is that simple single antenna adjusts renewal process, and system processing complexity is made to be greatly lowered.

As shown in figure 3, by taking a two transmitting antenna systems as an example, this system includes an input baseband signal s (t), two Parallel transmitting branch, each transmitting branch correspond to a transmitting antenna.In each transmitting branch, signal s (t) is first through multiplier With by dividing the formula coefficient that launching beam formation algorithm determines It is multiplied respectively, obtains I and Q two A baseband signal component;Then again with the high-frequency signal cos2 π f that are generated by oscillatorcT, sin2 π fcT is multiplied (f respectivelycIt is to carry Wave frequency rate), obtain two modulated signalsAdder is by the two Signal all the way is obtained after addition, i.e.,Through filter Launched by antenna after wave device and power amplifier.Wherein,Defer to relationship:

Divide the optimization of formula launching beam formation algorithmValue, hereby it is ensured that two transmitting branches are sent out The signal penetrated can be consistent in receiving terminal phase, that is, is receiving extreme direction realization Wave beam forming. Adjustment more New process substep carries out, and is only adjusted on an antenna each time, finishes the lower antenna of rear steering and continue to adjust, recycle into Row.The calculating of each updated value is executed according to above-mentioned point of formula launching beam formation algorithm.Above-mentioned optimization process persistently carries out, It is obtainedOptimal value can generate launching beam receiving extreme direction.

According to above-described embodiment, the present invention can be realized well.It is worth noting that before based on above-mentioned design principle It puts, to solve same technical problem, even if some made on architecture basics disclosed in this invention are without substantive Change or polishing, the essence of used technical solution is still as the present invention, therefore it should also be as the protection model in the present invention In enclosing.

Claims (3)

1. one kind divides formula distribution antenna launching beam to optimize forming method, which is characterized in that include the following steps:
(1) every transmitting antenna corresponds to a transmitting branch, and each transmitting branch inputs baseband signal;
(2) baseband signal is decomposed into I/Q base band components;
(3) I/Q base band components are sent out after radio-frequency modulations and amplification by transmitting antenna;
(4) receiving terminal feedback information to transmitting terminal, transmitting terminal adjusts I/Q base band components according to feedback information;
(5) the I/Q base band components of each transmitting branch are after radio-frequency modulations, amplification, transmitting, feedback adjustment so that the tune of transmitting Signal processed finally realizes that phase is consistent, is consequently formed launching beam in receiving terminal;
Wherein, the method for I/Q base band components being optimized and revised in the step (4) is:Adjustment is only in a transmitting antenna each time Upper progress, adjustment finish the lower antenna of rear steering and adjust in succession, and cycle carries out incessantly successively;
Optimization algorithm is formed using point formula launching beam in the step (4) and optimizes and revises I/Q base band components, the tool of the algorithm Steps are as follows for body:
IfThe in-phase component I at kth moment that is respectively baseband signal s (t) on n-th transmitting antenna and The amplitude of quadrature component Q;
Corresponding random real number value conduct is arranged for the random N number of antenna for sending array, in (- 1,1) section in (4-1) Initial value, wherein n=0,1 ..., N-1;
(4-2) enables h0(0)=1 it is feedback iteration regulation coefficient initial value, n=0, k=0,It calculates one by oneWherein, Δ0For constant, according to eachValue, it is same on N root transmitting antennas When send common signal s (t);
(4-3) then carries out step (4-5) if n=0, k=0, otherwise, feedback is determined according to the feedback information from receiving terminal Iteration adjustment coefficient hn(k) value is as follows:
Wherein, ξ is real number, and 0<ξ<1;
(4-4) is according to formula material calculation:
(4-5) is calculated and is updatedValue:
It calculates and updatesValue:
According to eachValue sends signal s (t) simultaneously on N root transmitting antennas;
(4-6) ifThen then k → k+1 carries out step (4-7);Otherwise, then k → k+1 is returned To step (4-3), wherein ε is an arbitrarily small positive real number;
(4-7) is if n<N-1 updates n → n+1;Otherwise, n → 0, and h is setn(k)=1 and
(4-8) cycle executes step step (4-3)-step (4-7), until the modulated signal of transmitting is finally realized in receiving terminal Phase is consistent.
2. according to claim 1 point of formula distribution antenna launching beam optimizes forming method, which is characterized in that emitting Under the setting receiver Qing Condition of end, using the I/Q base band components optimized and revisedAs receive signal weights, Thus it is generated in the transmitting terminal and receives wave beam.
3. according to claim 1 or 2 point of formula distribution antenna launching beam optimizes forming method, which is characterized in that institute State in step (5) that the specific method is as follows:
After (5-1) optimizes and revises s (t) and step (4)It is multiplied respectively after obtaining two updates of I and Q Baseband signal component;
(5-2) two baseband signal components are multiplied to obtain two modulated signals with high-frequency signal;
(5-3) obtains signal all the way after being added two modulated signals;
(5-4) signal it is filtered and amplification after launched by transmitting antenna.
CN201610185886.0A 2016-03-25 2016-03-25 One kind divides formula distribution antenna launching beam to optimize forming method CN105743555B (en)

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Publication number Priority date Publication date Assignee Title
CN1283936A (en) * 1999-08-10 2001-02-14 信息产业部电信科学技术研究院 Baseband processing method based on intelligent antoma and interference cancel
CN101227242A (en) * 2008-01-31 2008-07-23 西安交通大学 Method for forming distributed aerial array beam based on channel correction
CN101483274A (en) * 2009-02-24 2009-07-15 中国航天科技集团公司第五研究院第五○四研究所 External calibration method for phase variable power detecting array antenna
EP2957982A1 (en) * 2014-06-20 2015-12-23 Technische Universität Dresden Self-synchronizable network

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20065841A0 (en) * 2006-12-21 2006-12-21 Nokia Corp Communication method and systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1283936A (en) * 1999-08-10 2001-02-14 信息产业部电信科学技术研究院 Baseband processing method based on intelligent antoma and interference cancel
CN101227242A (en) * 2008-01-31 2008-07-23 西安交通大学 Method for forming distributed aerial array beam based on channel correction
CN101483274A (en) * 2009-02-24 2009-07-15 中国航天科技集团公司第五研究院第五○四研究所 External calibration method for phase variable power detecting array antenna
EP2957982A1 (en) * 2014-06-20 2015-12-23 Technische Universität Dresden Self-synchronizable network

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