CN106603137A - Method and device for combining antennas - Google Patents

Method and device for combining antennas Download PDF

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Publication number
CN106603137A
CN106603137A CN201510681440.2A CN201510681440A CN106603137A CN 106603137 A CN106603137 A CN 106603137A CN 201510681440 A CN201510681440 A CN 201510681440A CN 106603137 A CN106603137 A CN 106603137A
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CN
China
Prior art keywords
passage
antenna
correlation coefficient
channel
channel response
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CN201510681440.2A
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Chinese (zh)
Inventor
吴昊
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中兴通讯股份有限公司
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Priority to CN201510681440.2A priority Critical patent/CN106603137A/en
Publication of CN106603137A publication Critical patent/CN106603137A/en

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Classifications

    • 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
    • H04B7/08Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • 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
    • H04B7/08Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842Weighted combining
    • H04B7/0862Weighted combining receiver computing weights based on information from the transmitter
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; Arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0204Channel estimation of multiple channels
    • H04L25/0206Channel estimation of multiple channels of each channel individually

Abstract

The present invention provides a method and device for combining antennas. The method comprises the steps of determining the channel response of each channel through channel estimation, determining the correlation coefficient of the channel and an adjacent channel according to the channel response of the channel and the channel response of the adjacent channel of the channel, obtaining the correlation coefficients of the antennas included by the channel through an interpolation method according to the correlation coefficient, wherein the conjugate of the correlation coefficient of the antennas is the combined weight of the antennas included by the channel, and the accumulation value of values obtained by the multiplication of the receiving data of the antennas included by the channel and the combined weight is the receiving data of the channels. According to the scheme, the problem of high complexity of an antenna combination operation in a condition of a large number of antennas is solved, and the complexity of the antenna combination operation is reduced.

Description

The method and device that antenna merges

Technical field

The present invention relates to the communications field, in particular to the method and device that a kind of antenna merges.

Background technology

Be in mobile communications the impact to anti-fading generation, diversity reception be frequently with one of effective measures.Moving In environment, multiple signals its fading profiles received by different approaches are different.The decline bag of mobile radiotelephone signal The content of two aspects is included:One from the shadow fading caused because of landform so that the average power signal of reception is one It is individual to fluctuate compared with long spacing or in the time;One causes signal signal in a shorter distance from multipath transmisstion There is change drastically in intensity.

Mobile wireless signal is received in a relatively short distance, signal fadeout is in time, frequency, space, angle and pole Change is all presented independence.The independent multiple signals that decline can be obtained using corresponding method using these features.Obtaining After the independent signal of multiple declines, need to merge them process.The effect of merging is exactly through phase adjustment It is added with each tributary signal after time delay so that signal to noise ratio is improved.The improvement of signal to noise ratio is relevant with weighter factor. According to the difference that weighter factor is selected, there are three kinds of basic merging modes:Selection combining, Maximal ratio combiner and grade gain Merge.Three kinds of basic merging methods, Maximal ratio combiner performance preferably, take second place, selection combining by equal gain combining performance Performance is worst.

In for correlation technique, in the case of many when number of antennas, the high problem of the union operation complexity of antenna, There is presently no effective solution.

The content of the invention

The invention provides the method and device that a kind of antenna merges, to solve correlation technique in when number of antennas is a lot Wait with the high problem of Maximal ratio combiner computational complexity.

According to an aspect of the invention, there is provided a kind of method that antenna merges, including:

The channel response of each passage is determined by channel estimation;

According to the channel response of channel response and the adjacency channel of the passage of the passage, determine the passage with it is described The correlation coefficient of adjacency channel;

According to the correlation coefficient, the correlation coefficient that the passage includes antenna, the antenna are obtained by interpolation method Correlation coefficient conjugation for the passage include antenna merging weight;

The receiving data that the passage includes antenna be multiplied by after the merging weight obtain value accumulated value be the passage Receiving data.

Further, the channel estimation includes one below:

The channel response is estimated with least square (Least square, referred to as LS) channel estimation methods;

With least mean-square error (Minimum Mean Square Error, referred to as MMSE) channel estimation methods to this Channel response is estimated.

Further, according to the passage channel response and the adjacency channel of the passage channel response, it is determined that described Passage includes with the correlation coefficient of the adjacency channel:

The channel response of the passage n is Hn, the channel response of the adjacency channel n+m of the passage is Hn+m, lead to Cross the correlation coefficient that following formula formula calculates passage n and passage n+m:

Wherein,Represent channel response HnAverage,Represent channel response Hn+mAverage, n and m is equal For positive integer.

Further, it is described that the correlation coefficient that the passage includes antenna, the phase of the antenna are obtained by interpolation method The conjugation of relation number includes at least one of for merging weight of the passage comprising antenna:

When the correlation coefficient of the passage represents antennas orthogonal spacing correlation coefficient, the passage is obtained by linear interpolation Vertical dimension correlation coefficient comprising antenna, determines the merging weight in the antennas orthogonal direction;

When the correlation coefficient of the passage represents antenna level interval correlation coefficient, the passage is obtained by linear interpolation Horizontal range correlation coefficient comprising antenna, determines the merging weight of the antenna horizontal direction.

Further, what receiving data of the passage comprising antenna was multiplied by the merging weight is accumulated as connecing for the passage Before receiving data, methods described also includes:

The passage is adjusted comprising the corresponding carrier phase of antenna makes the carrier wave in the same direction.

According to a further aspect in the invention, there is provided the device that a kind of antenna merges, including:

Estimation module, for determining the channel response of each passage by channel estimation;

Correlation coefficient module, for according to the channel response of the channel response of the passage and the adjacency channel of the passage, Determine the correlation coefficient of the passage and the adjacency channel;

Interpolating module, for according to the correlation coefficient, by interpolation method the correlation that the passage includes antenna being obtained Coefficient, the conjugation of the correlation coefficient of the antenna is by merging weight of the passage comprising antenna;

Merging module, the receiving data for including antenna for the passage is multiplied by after the merging weight and obtains the cumulative of value It is worth for the receiving data of the passage.

Further, the channel estimation includes one below:

The channel response is estimated with least square LS channel estimation methods;

The channel response is estimated with least mean-square error MMSE channel estimation methods.

Further, the correlation coefficient module includes:

Computing unit, for calculating the correlation coefficient of passage n and passage n+m by following formula formula:

Wherein, the passage is H for the channel response of passage nn, the letter of the passage n+m of the adjacency channel of the passage Road response is Hn+m,Represent channel response HnAverage,Represent channel response Hn+mAverage, n and M is positive integer.

Further, the interpolating module includes at least one of:

First interpolating unit, during for the correlation coefficient that antennas orthogonal spacing is represented in the correlation coefficient of the passage, passes through Linear interpolation obtains vertical dimension correlation coefficient of the passage comprising antenna, determines the conjunction in the antennas orthogonal direction And weights;

Second interpolating unit, during for the correlation coefficient that antenna level interval is represented in the correlation coefficient of the passage, passes through Linear interpolation obtains horizontal range correlation coefficient of the passage comprising antenna, determines the conjunction of the antenna horizontal direction And weights.

Further, described device also includes:

Adjusting module, makes the carrier wave in the same direction for being adjusted comprising the corresponding carrier phase of antenna to the passage.

By the present invention, the channel response of each passage is determined by channel estimation, according to channel response and this of the passage The channel response of the adjacency channel of passage, determines the correlation coefficient of the passage and the adjacency channel, according to the correlation coefficient, The correlation coefficient that the passage includes antenna is obtained by interpolation method, the conjugation of the correlation coefficient of the antenna is the passage institute Merging weight comprising antenna, the receiving data that the passage includes antenna is multiplied by after the merging weight accumulated value for obtaining value For the receiving data of the passage, solve in the case of many when number of antennas, the union operation complexity of antenna is high Problem, reduces the complexity of antenna union operation.

Description of the drawings

Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, the present invention Schematic description and description be used for explain the present invention, do not constitute inappropriate limitation of the present invention.In the accompanying drawings:

Fig. 1 is the flow chart that a kind of antenna according to embodiments of the present invention merges;

Fig. 2 is the structured flowchart one of the device that a kind of antenna according to embodiments of the present invention merges;

Fig. 3 is the structured flowchart two of the device that a kind of antenna according to embodiments of the present invention merges;

Fig. 4 is the structured flowchart three of the device that a kind of antenna according to embodiments of the present invention merges;

Fig. 5 is the structured flowchart four of the device that a kind of antenna according to embodiments of the present invention merges;

Fig. 6 is the method flow diagram that a kind of antenna according to the preferred embodiment of the invention merges;

Fig. 7 is that a kind of antenna according to the preferred embodiment of the invention merges schematic device;

Fig. 8 is antenna alignment schematic diagram one according to the preferred embodiment of the invention;

Fig. 9 is antenna alignment schematic diagram two according to the preferred embodiment of the invention.

Specific embodiment

Below with reference to accompanying drawing and in conjunction with the embodiments describing the present invention in detail.It should be noted that in the feelings not conflicted Under condition, the feature in embodiment and embodiment in the application can be mutually combined.

It should be noted that description and claims of this specification and term " first ", " second " in above-mentioned accompanying drawing Etc. being object for distinguishing similar, without for describing specific order or precedence.

A kind of method that antenna merges is provided in the present embodiment, and Fig. 1 is that a kind of antenna according to embodiments of the present invention is closed And flow chart, as shown in figure 1, the flow process comprises the steps:

Step S102, by channel estimation the channel response of each passage is determined;

Step S104, according to channel response and the channel response of the adjacency channel of the passage of the passage, determines the passage With the correlation coefficient of the adjacency channel;

Step S106, according to the correlation coefficient, by interpolation method the correlation coefficient that the passage includes antenna is obtained, The conjugation of the correlation coefficient of the antenna includes the merging weight of antenna for the passage;

Step S108, the receiving data that the passage includes antenna is multiplied by after the merging weight accumulated value for obtaining value to be somebody's turn to do The receiving data of passage.

By above-mentioned steps, the channel response of each passage is determined by channel estimation, according to the passage channel response with The channel response of the adjacency channel of the passage, determines the correlation coefficient of the passage and the adjacency channel, according to the correlation coefficient, The correlation coefficient that the passage includes antenna is obtained by interpolation method, the conjugation of the correlation coefficient of the antenna is the passage institute Merging weight comprising antenna, the receiving data that the passage includes antenna is multiplied by after the merging weight accumulated value for obtaining value For the receiving data of the passage, solve in the case of many when number of antennas, the union operation complexity of antenna is high Problem, reduces the complexity of antenna union operation.

In the present embodiment, the channel estimation includes two methods, with least square LS channel estimation methods to the channel Respond and estimated, or, the channel response is estimated with least mean-square error MMSE channel estimation methods.

In the present embodiment, according to the channel response and the channel response of the adjacency channel of the passage of the passage, determine that this leads to Road includes with the correlation coefficient of the adjacency channel:

The passage is H for the channel response of passage nn, the channel response of the passage n+m of the adjacency channel of the passage is Hn+m, the correlation coefficient of passage n and passage n+m is calculated by following formula formula:

Wherein,Represent channel response HnAverage,Represent channel response Hn+mAverage, n and m is equal For positive integer.

In the present embodiment, the correlation coefficient that the passage includes antenna, the correlation of the antenna should be obtained by interpolation method The conjugation of coefficient is that merging weight of the passage comprising antenna includes, in the correlation coefficient of the passage antennas orthogonal spacing is represented Correlation coefficient when, by linear interpolation obtain the passage comprising antenna vertical dimension correlation coefficient, determine the antenna hang down Nogata to the merging weight, when the correlation coefficient of the passage represents the correlation coefficient of antenna level interval, by linear Interpolation obtains horizontal range correlation coefficient of the passage comprising antenna, determines the merging weight of the antenna horizontal direction, this Sample ensures that the antenna that each passage is included is approximately superposition in the same direction, is directly added relative to simple, merges Performance can increase.

In the present embodiment, receiving data of the passage comprising antenna is multiplied by the reception for being accumulated as the passage of the merging weight Before data, the method also includes, the passage is adjusted comprising the corresponding carrier phase of antenna makes the carrier wave in the same direction, Total output signal-to-noise ratio can be so obviously improved.

The device that a kind of antenna merges is additionally provided in the present embodiment, and the device is used to realize above-described embodiment and preferred reality Mode is applied, repeating no more for explanation had been carried out.As used below, term " module " can realize predetermined work( The software of energy and/or the combination of hardware.Although the device described by following examples is preferably realized with software, Hardware, or the realization of the combination of software and hardware is also may and to be contemplated.

Fig. 2 is the structured flowchart one of the device that a kind of antenna according to embodiments of the present invention merges, as shown in Fig. 2 the dress Put including:

Estimation module 22, for determining the channel response of each passage by channel estimation;

Correlation coefficient module 24 is connected with estimation module 22, adjacent with the passage for the channel response according to the passage The channel response of passage, determines the correlation coefficient of the passage and the adjacency channel;

Interpolating module 26 is connected with correlation coefficient module 24, for according to the correlation coefficient, being somebody's turn to do by interpolation method Passage includes the correlation coefficient of antenna, and the conjugation of the correlation coefficient of the antenna includes the merging weight of antenna for the passage;

Merging module 28 is connected with interpolating module 26, and the receiving data for including antenna for the passage is multiplied by the merging power The accumulated value that value is obtained after value is the receiving data of the passage.

By above-mentioned steps, estimation module 22 determines the channel response of each passage, phase relation digital-to-analogue by channel estimation Block 24, according to channel response and the channel response of the adjacency channel of the passage of the passage, determines that the passage is adjacent with this logical The correlation coefficient in road, interpolating module 26 obtains the passage and includes antenna according to the correlation coefficient by interpolation method Correlation coefficient, the conjugation of the correlation coefficient of the antenna includes the merging weight of antenna for the passage, and merging module 28 will The receiving data that the passage includes antenna be multiplied by after the merging weight obtain value accumulated value be the passage receiving data, Solve in the case of many when number of antennas, the high problem of the union operation complexity of antenna reduces antenna merging The complexity of computing.

Fig. 3 is the structured flowchart two of the device that a kind of antenna according to embodiments of the present invention merges, as shown in figure 3, the phase Closing coefficient module 24 also includes:

Computing unit 32, for calculating the correlation coefficient of passage n and passage n+m by following formula formula:

Wherein, the passage is H for the channel response of passage nn, the channel sound of the passage n+m of the adjacency channel of the passage Should be Hn+m,Represent channel response HnAverage,Represent channel response Hn+mAverage, n and m is equal For positive integer.

Fig. 4 is the structured flowchart three of the device that a kind of antenna according to embodiments of the present invention merges, as shown in figure 4, this is inserted Value module 26 also includes:

First interpolating unit 42, during for the correlation coefficient that antennas orthogonal spacing is represented in the correlation coefficient of the passage, passes through Linear interpolation obtains vertical dimension correlation coefficient of the passage comprising antenna, determines the merging weight in the antennas orthogonal direction;

Second interpolating unit 44, during for the correlation coefficient that antenna level interval is represented in the correlation coefficient of the passage, passes through Linear interpolation obtains horizontal range correlation coefficient of the passage comprising antenna, determines the merging weight of the antenna horizontal direction.

So ensure that the antenna that each passage is included is approximately superposition in the same direction, be directly added relative to simple, Merging performance can increase.

Fig. 5 is the structured flowchart four of the device that a kind of antenna according to embodiments of the present invention merges, as shown in figure 5, the dress Put in addition to including all modules shown in Fig. 2, also include:

Adjusting module 52 is connected with interpolating module 26, for being adjusted comprising the corresponding carrier phase of antenna to the passage Make the carrier wave in the same direction.

It should be noted that above-mentioned modules can be by software or hardware to realize, for the latter, Ke Yitong Cross in the following manner realization, but not limited to this:Above-mentioned module is respectively positioned in same processor;Or, above-mentioned module distinguishes position In multiple processors.

With reference to preferred embodiment and embodiment, the present invention is described in detail.

The preferred embodiments of the present invention provide the method and apparatus that a kind of antenna merges, for improving the performance of communication system, In being applied to communication system.

In a preferred embodiment of the invention, including:1) channel response of each passage is obtained by channel estimation;2) The correlation coefficient of adjacency channel is estimated according to the channel response of passage;3) obtain each passage by interpolation method to be included Antenna correlation coefficient, the conjugation of this correlation coefficient is the merging weight of antenna that each passage is included;4) it is every Individual passage is merged by Maximal ratio combiner method, is included the step of realize:

Step 1, by channel estimation the channel response of each passage is obtained.The channel response of each passage can be by eventually The pilot frequency sequence that end sends is estimated.Channel estimation methods include least square LS channel estimation methods, lowest mean square Error MMSE channel estimation methods etc..

Step 2, according to the channel response of passage the correlation coefficient of adjacency channel is estimated.Assume passage n channel response be Hn, the channel response of passage n+m is Hn+m, the correlation coefficient of passage n and passage n+m is calculated by following formula formula:

WhereinRepresent channel response HnAverage,Represent channel response Hn+mAverage.

Step 3, by interpolation method the antenna correlation coefficient that each passage is included, the conjugation of this correlation coefficient are obtained The as merging weight of the antenna that each passage is included.The phase of passage n and passage n+m can be obtained by step 2 Relation number CORn,n+m, the correlation coefficient that each passage includes antenna can be obtained by interpolation method.Each passage Comprising antenna data be multiplied by after this weights and be then combined with as channel data.

Step 4, each passage is merged by Maximal ratio combiner method.Maximal ratio combiner method is in each passage Signal is adjusted to each road-load wave phase before merging and is allowed in the same direction and then is added, and can so be obviously improved total output Signal to noise ratio.

Fig. 6 is the method flow diagram that a kind of antenna according to the preferred embodiment of the invention merges, as shown in fig. 6, its step Including:

Step S601, by channel estimation the channel response of each passage is obtained;

Step S602, according to the channel response of passage the correlation coefficient of adjacency channel is estimated;

Step S603, by interpolation method the antenna correlation coefficient that each passage is included is obtained, this correlation coefficient Conjugation is the merging weight of the antenna that each passage is included;

Step S604, each passage is merged by maximum ratio method.

Another aspect according to a preferred embodiment of the invention, the preferred embodiments of the present invention additionally provide a kind of antenna and merge Transposition.

Fig. 7 is that a kind of antenna according to the preferred embodiment of the invention merges schematic device, as shown in fig. 7, generally comprising Following four module:Channel estimation module 701 equivalent to above-described embodiment estimation module 22, passage correlation coefficient calculate , equivalent to the correlation coefficient module 24 of above-described embodiment, antenna merging module 703 is equivalent to above-described embodiment for module 702 Interpolating module 26, merging module 28 of the passage merging module 704 equivalent to above-described embodiment.Channel estimation module 701 For obtaining the channel response of each passage by channel estimation;Passage correlation coefficient computing module 702 is used for according to passage Channel response estimate adjacency channel correlation coefficient, antenna merging module 703 be used for by interpolation method obtain each lead to The antenna correlation coefficient that road is included, the conjugation of this correlation coefficient is the merging weight of the antenna that each passage is included. Passage merging module 704 is merged for each passage by Maximal ratio combiner method.

In a preferred embodiment of the invention, there is provided a kind of antenna merging method and device, wherein, the method is led to first The channel response that channel estimation obtains each passage is crossed, the phase relation of adjacency channel is then estimated according to the channel response of passage Number, then passes through interpolation method and obtains the antenna correlation coefficient that each passage is included, and the conjugation of this correlation coefficient is The merging weight of the antenna that each passage is included, last each passage is merged by Maximal ratio combiner method.

Fig. 8 is antenna alignment schematic diagram one according to the preferred embodiment of the invention, as shown in Figure 8.

The positive 45 degree of poliarizing antennas of expression of dotted line, the minus 45 degree of poliarizing antennas of expression of solid line.Passage 1 includes the He of antenna 1 Antenna 3, passage 2 includes antenna 2 and antenna 4, and passage 3 includes antenna 5 and antenna 7, and passage 4 includes antenna 6 With antenna 8, passage 5 includes antenna 9 and antenna 11, and passage 6 includes antenna 10 and antenna 12, and passage 7 includes day Line 13 and antenna 15, passage 8 includes antenna 14 and antenna 16.Passage 9 includes antenna 17 and antenna 19, passage 10 include antenna 18 and antenna 20, and passage 11 includes antenna 21 and antenna 23, and passage 12 includes antenna 22 and antenna 24, passage 13 includes antenna 25 and antenna 27, and passage 14 includes antenna 26 and antenna 28, and passage 15 includes antenna 29 and antenna 31, passage 16 includes antenna 30 and antenna 32, includes the step of the antenna of the embodiment merges:

Step 1, by channel estimation the channel response of each passage is obtained.Passage n (n=1,2,3 ..., 14,15,16) The pilot frequency sequence that channel response using terminal sends is obtained by MMSE channel estimation methods.

Step 2, according to the channel response of passage the correlation coefficient of adjacency channel is estimated.Assume passage n channel response be Hn, the channel response of passage n+m is Hn+m, the correlation coefficient of passage n and passage n+m is calculated by following formula formula:

WhereinRepresent channel response HnAverage,Represent channel response Hn+mAverage.

Step 3, by interpolation method the antenna correlation coefficient that each passage is included, the conjugation of this correlation coefficient are obtained The as merging weight of the antenna that each passage is included.According to channel estimation calculation passage n and the dependency of passage n+2 CORn,n+2(n=1,2,5,6,9,10,13,14).This correlation coefficient represents that antenna distance is twice BS days Line vertical interval, one times of BS antennas orthogonal can be obtained apart from correlation coefficient by linear interpolation.This correlation coefficient Conjugation is antenna merging weight.So ensure that the antenna that each passage is included is approximately to be superimposed in the same direction, phase The simple performance that is directly added can be increased.

Step 4, each passage is merged by Maximal ratio combiner method.Maximal ratio combiner method is in each passage Signal is adjusted to each road-load wave phase before merging and is allowed in the same direction and then is added, and can so be obviously improved total output Signal to noise ratio.

Fig. 9 is antenna alignment schematic diagram two according to the preferred embodiment of the invention, as shown in Figure 9.

The minus 45 degree of poliarizing antennas of expression of solid line.Passage 1 includes antenna 1 and antenna 3, and passage 3 includes antenna 5 and day Line 7, passage 5 includes antenna 9 and antenna 11, and passage 7 includes antenna 13 and antenna 15.Passage 9 includes antenna 17 With antenna 19, passage 11 includes antenna 21 and antenna 23, and passage 13 includes antenna 25 and antenna 27, passage 15 Comprising antenna 29 and antenna 31, include the step of the antenna of the embodiment merges:

Step 1, by channel estimation the channel response of each passage is obtained, and passage n (n=1,3 ..., 13, channel 15) The pilot frequency sequence that response using terminal sends is obtained by MMSE channel estimation methods.

Step 2, according to the channel response of passage the correlation coefficient of adjacency channel is estimated.Assume passage n channel response be Hn, the channel response of passage n+m is Hn+m, the correlation coefficient of passage n and passage n+m is calculated by following formula formula:

WhereinRepresent channel response HnAverage,Represent channel response Hn+mAverage.

Step 3, by interpolation method the antenna correlation coefficient that each passage is included, the conjugation of this correlation coefficient are obtained The as merging weight of the antenna that each passage is included.According to channel estimation calculation passage n and the dependency of passage n+2 CORn,n+2(n=1,5,9,13).This correlation coefficient represents that antenna distance is twice BS antennas orthogonal spacing, leads to Crossing linear interpolation can obtain one times of BS antennas orthogonal apart from correlation coefficient.The conjugation of this correlation coefficient is antenna conjunction And weights.So ensure that the antenna that each passage is included is approximately to be superimposed in the same direction, relatively simple direct phase Plus performance can increase.

Step 4, each passage is merged by Maximal ratio combiner method.Maximal ratio combiner method is in each passage Signal is adjusted to each road-load wave phase before merging and is allowed in the same direction and then is added, and can so be obviously improved total output Signal to noise ratio.

The arrangement mode and coding rule of antenna according to shown in Fig. 9, in another embodiment, the expression minus 45 of solid line Degree poliarizing antenna.Passage 1 include antenna 1, antenna 3, antenna 9 and antenna 11, passage 5 include antenna 5, antenna 7, Antenna 13 and antenna 15.Passage 9 includes antenna 17, antenna 19, antenna 25 and antenna 27.Passage 13 includes day Line 21, antenna 23, antenna 29 and antenna 31, include the step of the antenna of the embodiment merges:

Step 1, by channel estimation the channel response of each passage is obtained.The channel response of passage n (n=1,5,9,13) The pilot frequency sequence that using terminal sends is obtained by MMSE channel estimation methods.

Step 2, according to the channel response of passage the correlation coefficient of adjacency channel is estimated.Assume passage n channel response be Hn, the channel response of passage n+m is Hn+m, the correlation coefficient of passage n and passage n+m is calculated by following formula formula:

WhereinRepresent channel response HnAverage,Represent channel response Hn+mAverage.

Step 3, by interpolation method the antenna correlation coefficient that each passage is included, the conjugation of this correlation coefficient are obtained The as merging weight of the antenna that each passage is included.According to channel estimation calculation passage n and the dependency of passage n+4 CORn,n+4(n=1,9), the dependency COR of passage n and passage n+8n,n+8(n=1,5).This correlation coefficient Represent that antenna distance is twice BS antennas orthogonal spacing and twice BS antenna level interval, can be obtained by linear interpolation One times of BS antennas orthogonal is obtained apart from correlation coefficient and one times of BS antenna horizontal range correlation coefficient.Previous correlation coefficient For vertical direction antenna merging weight, latter correlation coefficient is horizontal direction antenna merging weight.So ensure that The antenna that each passage is included is approximately superposition in the same direction, and relatively simple direct addition performance can increase.

Step 4, each passage is merged by Maximal ratio combiner method.Maximal ratio combiner method is in each passage Signal is adjusted to each road-load wave phase before merging and is allowed in the same direction and then is added, and can so be obviously improved total output Signal to noise ratio.

Using a kind of antenna merging method and device described in the preferred embodiments of the present invention, can largely be lifted and be System performance.

Embodiments of the invention additionally provide a kind of storage medium.Alternatively, in the present embodiment, above-mentioned storage medium can To be arranged to store the program code for performing the method and step of above-described embodiment:

Alternatively, in the present embodiment, above-mentioned storage medium can be including but not limited to:USB flash disk, read only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), portable hard drive, Magnetic disc or CD etc. are various can be with the medium of store program codes.

Alternatively, in the present embodiment, processor performs above-described embodiment according to the program code stored in storage medium Method and step.

Alternatively, the specific example in the present embodiment may be referred to showing described in above-described embodiment and optional embodiment Example, the present embodiment will not be described here.

Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general Realizing, they can be concentrated on single computing device computing device, or be distributed in multiple computing devices and constituted Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to by they Storage is performed in the storage device by computing device, and in some cases, can be held with the order being different from herein The shown or described step of row, or they are fabricated to respectively each integrated circuit modules, or will be many in them Individual module or step are fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific hardware Combine with software.

The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the technology of this area For personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made it is any Modification, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (10)

1. a kind of method that antenna merges, it is characterised in that include:
The channel response of each passage is determined by channel estimation;
According to the channel response of channel response and the adjacency channel of the passage of the passage, determine the passage with The correlation coefficient of the adjacency channel;
According to the correlation coefficient, the correlation coefficient that the passage includes antenna is obtained by interpolation method, it is described The conjugation of the correlation coefficient of antenna is by merging weight of the passage comprising antenna;
The receiving data that the passage includes antenna is multiplied by after the merging weight and obtains the accumulated value of value for described The receiving data of passage.
2. method according to claim 1, it is characterised in that the channel estimation includes one below:
The channel response is estimated with least square LS channel estimation methods;
The channel response is estimated with least mean-square error MMSE channel estimation methods.
3. method according to claim 1, it is characterised in that according to channel response and the passage of the passage The channel response of adjacency channel, determines that the passage includes with the correlation coefficient of the adjacency channel:
The channel response of the passage n is Hn, the channel response of the adjacency channel n+m of the passage is Hn+m, The correlation coefficient of passage n and passage n+m is calculated by following formula formula:
COR n , n + m = Σ ( H n - H ‾ n ) ( H n + m - H ‾ n + m ) * Σ ( H n - H ‾ n ) 2 Σ ( H n + m - H ‾ n + m ) 2
Wherein,Represent channel response HnAverage,Represent channel response Hn+mAverage, n and m It is positive integer.
4. method according to claim 1, it is characterised in that described the passage is obtained by interpolation method to be included The correlation coefficient of antenna, the conjugation of the correlation coefficient of the antenna includes for merging weight of the passage comprising antenna At least one of:
When the correlation coefficient of the passage represents the correlation coefficient of antennas orthogonal spacing, obtain described by linear interpolation Vertical dimension correlation coefficient of the passage comprising antenna, determines the merging weight in the antennas orthogonal direction;
When the correlation coefficient of the passage represents the correlation coefficient of antenna level interval, obtain described by linear interpolation Horizontal range correlation coefficient of the passage comprising antenna, determines the merging weight of the antenna horizontal direction.
5. the method according to any one of Claims 1-4, it is characterised in that reception number of the passage comprising antenna According to being accumulated as before the receiving data of the passage of the merging weight is multiplied by, methods described also includes:
The passage is adjusted comprising the corresponding carrier phase of antenna makes the carrier wave in the same direction.
6. the device that a kind of antenna merges, it is characterised in that include:
Estimation module, for determining the channel response of each passage by channel estimation;
Correlation coefficient module, for ringing with the channel of the adjacency channel of the passage according to the channel response of the passage Should, determine the correlation coefficient of the passage and the adjacency channel;
Interpolating module, for according to the correlation coefficient, obtaining the passage by interpolation method and including antenna Correlation coefficient, the conjugation of the correlation coefficient of the antenna is by merging weight of the passage comprising antenna;
Merging module, the receiving data for including antenna for the passage is multiplied by after the merging weight and obtains value Accumulated value is the receiving data of the passage.
7. device according to claim 6, it is characterised in that the channel estimation includes one below:
The channel response is estimated with least square LS channel estimation methods;
The channel response is estimated with least mean-square error MMSE channel estimation methods.
8. device according to claim 6, it is characterised in that the correlation coefficient module includes:
Computing unit, for calculating the correlation coefficient of passage n and passage n+m by following formula formula:
COR n , n + m = Σ ( H n - H ‾ n ) ( H n + m - H ‾ n + m ) * Σ ( H n - H ‾ n ) 2 Σ ( H n + m - H ‾ n + m ) 2
Wherein, the channel response of the passage n is Hn, the channel response of the adjacency channel n+m of the passage is Hn+m,Represent channel response HnAverage,Represent channel response Hn+mAverage, n and m is equal For positive integer.
9. device according to claim 6, it is characterised in that the interpolating module includes at least one of:
First interpolating unit, during for the correlation coefficient that antennas orthogonal spacing is represented in the correlation coefficient of the passage, Vertical dimension correlation coefficient of the passage comprising antenna is obtained by linear interpolation, the antennas orthogonal direction is determined The merging weight;
Second interpolating unit, during for the correlation coefficient that antenna level interval is represented in the correlation coefficient of the passage, Horizontal range correlation coefficient of the passage comprising antenna is obtained by linear interpolation, the antenna horizontal direction is determined The merging weight.
10. the device according to any one of claim 6 to 9, it is characterised in that described device also includes:
Adjusting module, makes the carrier wave in the same direction for being adjusted comprising the corresponding carrier phase of antenna to the passage.
CN201510681440.2A 2015-10-19 2015-10-19 Method and device for combining antennas CN106603137A (en)

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