CN102195695B - Antenna calibration method and device - Google Patents

Abstract

The embodiment of the invention discloses an antenna transmission calibration method, which comprises that: a baseband signal processor transmits a calibration sequence by a transmission radio frequency channel, and a calibration signal processor receives the calibration sequence by a calibration channel; the calibration signal processor judges whether errors of coupling networks are required to be compensated or not according to the accuracy of a receiving coupling network, calculates a calibration coefficient by the received calibration sequence, and transmits the calculated calibration coefficient to the baseband signal processor; and the baseband signal processor performs coefficient compensation according to the calibration coefficient. The embodiment of the invention also discloses an antenna transmission calibration device, which comprises the baseband signal processor, the calibration signal processor, a coupling signal processor and a coupling data memory. The embodiment of the invention can take the errors among channels of the coupling networks into account in calibration, perform the error compensation on the coupling networks, and effectively improve the antenna calibration accuracy, thereby improving beamforming performance.

Description

The method of antenna calibration and device

Technical field

The present invention relates to moving communicating field, particularly, the present invention relates to method and the device of antenna calibration.

Background technology

Mobile and broadband becomes the developing direction of modern communication technology, and impact how to eliminate cochannel interference, multiple access interference and multipath fading becomes people consider when improving the mobile radio system performance principal element.Intelligent antenna technology becomes a study hotspot in moving communicating field in recent years.

Intelligent antenna technology has brought huge advantage to mobile communication system.For example, when using smart antenna, be combined with other baseband digital signal treatment technology, as joint-detection, Interference Cancellation etc., after in wireless base station, having used intelligent antenna technology, the signal that base station receives is from each antenna element and the received signal sum of receiver, if adopt the maximum power composition algorithm, disregarding under the condition of multipath transmisstion, total reception signal will increase by 10 * lgN dB, and wherein, N is the quantity of antenna element.While having multipath, the improvement of this receiving sensitivity will be looked multipath transmisstion condition and uplink beam figuration algorithm and become, and its result is the gain of 10 * 1gN dB nearly also.

At present, intelligent antenna technology is as one of main direction of physical layer communication technical development.Intelligent antenna technology not only can use in TDD system, also can use in FDD system fully, the extensive use of smart antenna provides leading, a perfect technology platform for us just, and it has promoted the development of mobile communication technology to a certain extent.

Antenna system has the advantages such as the cell coverage area of raising, Inhibitory signal interference due to it, at TD-SCDMA(Time Division-Synchronization Code Division Multiple Access, the TD SDMA access) in system, be widely used, and in following LTE communication system, can continue to use.Very little secondary lobe is arranged when for the wave beam main lobe that guarantees smart antenna, pointing to the expectation terminal, meet simultaneously the requirement of user DOA estimated accuracy, each bay radio-frequency channel property preservation that requires to form smart antenna when smart antenna uses is consistent, therefore adopts in the system of smart antenna all with the antenna calibration function.

Intelligent antenna calibration system comprises at present: one or more radio-frequency transmissions passage and radio frequency reception channel; The transmitting-receiving coupling channel; Calibration receive path and transmission channel; The calibrating signal processor; Baseband signal processor etc., as shown in Figure 1.Calibration steps divides time domain calibration and frequency domain to calibrate two kinds, is respectively to make each array element radio-frequency channel property preservation consistent at time domain and frequency domain.

Send the calibration flow process as follows:

Baseband signal processor sends the known calibration sequence by each radio-frequency channel, road;

Calibrating sequence arrives calibrated channel through receiving coupling network;

The calibrating signal processor receives data by calibrated channel;

The calibrating signal processor, according to the time domain or the frequency domain characteristic that receive each transmission radio-frequency channel, road of Signal estimation, calculates calibration factor, and sends to baseband signal processor;

Baseband signal processor carries out compensating coefficient in the signal emission process, guarantee that the amplitude-phase of each transmission radio-frequency channel, road is consistent.

Receive the calibration flow process as follows:

The calibrating signal processor sends the known calibration sequence by calibrated channel;

Calibrating sequence arrives each road receiving RF channel through sending coupling network;

Baseband signal processor receives data by each road receiving RF channel, and sends to the calibrating signal processor;

The calibrating signal processor, according to the time domain or the frequency domain characteristic that receive each road receiving RF channel of Signal estimation, calculates calibration factor, and sends to baseband signal processor;

Baseband signal processor carries out compensating coefficient at the signal receiving course, guarantees that the amplitude-phase of each road receiving RF channel is consistent.

In sending and receiving calibration flow process, frequency domain calibration factor calculation procedure is as follows:

Suppose to estimate to receive passage or send out the passage frequency domain response and be

K wherein _a=1 ..., K _a, K _aExpression radio-frequency channel number, k=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration, basis

Can calculate the frequency domain calibration factor of receiving passage or sending out passage, because the algorithm that calculates calibration factor is a lot, be exemplified below:

(1) mean value of the maximum sub-carrier power of Qiu Ge road radio frequency path:

In || x|| ²The expression ask plural x mould square;

(2) calculate the penalty coefficient on every link

For:

$c_{k_a}\left(k\right)=\frac{\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)}{{\hat{H}}_{k_a}\left(k\right)},k=1,...,N_{\mathrm{sc}},k_a=1,...,K_a.$

In sending and receiving calibration flow process, Time Domain Calibration factor calculation procedure is as follows:

Suppose to estimate to receive passage or send out the passage frequency domain response and be

K wherein _a=1 ..., K _aExpression radio-frequency channel number, basis

Can calculate the Time Domain Calibration coefficient of receiving passage or sending out passage, be exemplified below:

(1) power average value of Qiu Ge road radio frequency path:

$P_{\mathrm{mean}}=\frac{1}{K_a}\left(\underset{k_a=1}{\overset{K_a}{\mathrm{\Σ}}}{\left|\right|{\hat{h}}_{k_a}\left|\right|}^2\right);$

(2) calculate the penalty coefficient on every link

For:

$c_{k_a}=\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)/{\hat{h}}_{k_a},k_a=1,...,K_a.$

Yet, in existing antenna calibration algorithm, be to carry out channel estimating by the close alignment to receiving or sending alignment signal, time domain or the frequency domain response of estimated result being used as to radio-frequency channel calculate calibration factor, due to the actual alignment signal, in calibration process, by path, except the transmitting-receiving radio-frequency channel, also comprise transceiver channel and the calibration transceiver channel of coupling disc, therefore this equivalent method can be introduced error, makes a concrete analysis of as follows.

To send the radio-frequency channel Time Domain Calibration as example explanation calibration existing problems at present, there is identical problem in the calibration stepss such as receive path calibration and frequency domain calibration.

When sending the radio-frequency channel Time Domain Calibration, the reception signal is

y=H ^tX+N ₀Wherein $H^t=H_{\mathrm{AC}}^r\×H_{\mathrm{CP}}^r\×H_{\mathrm{RF}}^t$ （1）

Wherein

The channel matrix of expression close alignment passage;

The channel matrix of coupling channel is received in expression;

The expression emission is the matrix of passage frequently; X is the known calibration sequence; N ₀For noise; Y is that calibrated channel receives signal.

Y carries out channel estimating to received signal, obtains time-domain response

For the pair of horns battle array, wherein diagonal element is

${\hat{h}}_{i,j}^t={\hat{h}}_{k_a}^t{h}_{k_a,\mathrm{CP}}^r{h}_{\mathrm{AC}}^r+n_{\mathrm{AWGN}},$ i=j=k _a=1,...,K _a （2）

I wherein, j representing matrix ranks number,

For reality sends radio-frequency channel k _aTime-domain response,

For receiving coupling channel k _aTime-domain response, For receiving the time-domain response of calibrated channel, n _AWGNFor white noise.Because white noise in calibration process is very little, for ease of analyzing, can suppose n _AWGN≈ 0.

Suppose basis

k _a=1 ..., K _aThe calculating calibration factor is

Following formula is arranged

$c_1{\hat{h}}_1^t=c_2{\hat{h}}_2^t=c_{k_a}{\hat{h}}_{k_a}^t=...=c_{K_a}{\hat{h}}_{K_a}^t---\left(3\right)$

In the transmission of actual downstream wave beam forming, signal sends without coupling network, and the radio-frequency channel of signal process is

k _a=1 ..., K _a, this moment, the difference of each radio-frequency channel, road was

$\mathrm{\Δ}{h}_{i,j}^t=c_i{h}_i^t-c_j{h}_j^t$ I ≠ j and i, j ∈ [1, K _a] (4)

I wherein, j represents radio-frequency channel number, by formula (2) substitution formula (3) and establish n _AWGN≈ 0, can obtain

$c_i{h}_i^t{h}_{i,\mathrm{CP}}^r{h}_{\mathrm{AC}}^r=c_j{h}_j^t{h}_{j,\mathrm{CP}}^r{h}_{\mathrm{AC}}^r$

$\⇒c_i{h}_i^t{h}_{i,\mathrm{CP}}^r=c_j{h}_j^t{h}_{j,\mathrm{CP}}^r$

$\⇒c_j{h}_j^t=c_i{h}_i^t(h_{i,\mathrm{CP}}^r/h_{j,\mathrm{CP}}^r)$ （5）

Formula (5) substitution formula (4) is obtained

$\mathrm{\Δ}{h}_{i,j}^t=c_i{h}_i^t(1-h_{i,\mathrm{CP}}^r/h_{j,\mathrm{CP}}^r)---\left(6\right)$

So when the calibration noise can be ignored, each channel error of coupling network was to cause calibrating the main cause that there is error in rear multi-channel rf passage.

Therefore, be necessary to propose a kind of scheme of antenna calibration, in calibration, consider each interchannel error of coupling network, thereby improve the performance that the antenna calibration precision promotes wave beam forming.

Summary of the invention

Purpose of the present invention is intended to solve at least one of above-mentioned technological deficiency, and is special in calibration, considering each interchannel error of coupling network, by coupling network is carried out to error compensation, thereby effectively improves the performance that the antenna calibration precision promotes wave beam forming.

In order to achieve the above object, embodiments of the invention have proposed a kind of method that antenna sends calibration on the one hand, comprise the following steps: baseband signal processor sends calibrating sequence by sending radio-frequency channel, described calibrating sequence arrives calibrated channel through receiving coupling network, and the calibrating signal processor receives described calibrating sequence by described calibrated channel;

Described calibrating signal processor need to judge whether compensation coupling network error according to receiving the coupling network precision, by the described calibrating sequence that receives, calculates calibration factor, and sends to described baseband signal processor;

Described baseband signal processor carries out compensating coefficient according to described calibration factor in the signal emission process, make the amplitude-phase that sends radio-frequency channel consistent;

When described calibrating signal processor judgement needs compensation coupling network error, by the described calibrating sequence that receives, calculate calibration factor and comprise the following steps:

Described calibrating signal processor calculates the time-domain response estimated value of described transmission radio-frequency channel according to the described calibrating sequence that receives

Or the estimated value of frequency domain response signal

And send to the coupled signal processor, and wherein, k _a=1 ..., K _a, K _aFor the radio-frequency channel number, k=1 ..., N _Sc, N _ScSub-carrier number for the frequency domain calibration;

Described calibrating signal processor is by the time-domain response estimated value of described transmission radio-frequency channel

Or the estimated value of frequency domain response signal

Send to the coupled signal processor;

The coupling data memory reads the receive path data according to the coupling network tables of data

Described coupling data memory is by described receive path data Send to described coupled signal processor;

Described coupled signal processor is according to the described receive path data that receive

Right

Or

Revise, obtain the time-domain response corrected signal

With the frequency domain response corrected signal

Send to described calibrating signal processor;

Described calibrating signal processor is according to described

With

Calculate calibration factor, described calibration factor is sent to described baseband signal processor.

Embodiments of the invention have also proposed a kind of method of antenna reception calibration on the other hand, comprise the following steps:

The calibrating signal processor sends calibrating sequence by calibrated channel, described calibrating sequence arrives receiving RF channel through sending coupling network, baseband signal processor receives described calibrating sequence by described receiving RF channel, and is transmitted to described calibrating signal processor;

Described calibrating signal processor need to judge whether compensation coupling network error according to sending the coupling network precision, by the described calibrating sequence that receives, calculates calibration factor, and sends to described baseband signal processor;

Described baseband signal processor carries out compensating coefficient according to described calibration factor in the signal receiving course, make the amplitude-phase of receiving RF channel consistent;

When described calibrating signal processor judgement needs compensation coupling network error, by the described calibrating sequence that receives, calculate calibration factor and comprise the following steps:

Described calibrating signal processor calculates the time-domain response estimated value of described receiving RF channel according to the described calibrating sequence that receives

Or the estimated value of frequency domain response signal

And send to the coupled signal processor, and wherein, k _a=1 ..., K _a, K _aFor the radio-frequency channel number, k=1 ..., N _Sc, N _ScSub-carrier number for the frequency domain calibration;

Described coupling data memory reads the sendaisle data according to the coupling network tables of data Described coupling data memory is by described sendaisle data

Send to described coupled signal processor;

Described coupled signal processor is according to the described sendaisle data that receive Right Or

Revise, obtain the time-domain response corrected signal

With the frequency domain response corrected signal

Send to described calibrating signal processor,

Described calibrating signal processor is according to described

With

Calculate calibration factor, described calibration factor is sent to described baseband signal processor.

Embodiments of the invention have proposed the device that a kind of antenna sends calibration more on the one hand, and this device comprises baseband signal processor, calibrating signal processor, coupled signal processor and coupling data memory,

Described baseband signal processor, for by sending radio-frequency channel, sending calibrating sequence, described calibrating sequence arrives calibrated channel through receiving coupling network;

Described calibrating signal processor, for by described calibrated channel, receiving described calibrating sequence, and described calibrating signal processor need to judge whether compensation coupling network error according to receiving the coupling network precision, by the described calibrating sequence that receives, calculate calibration factor, and send to described baseband signal processor;

Described baseband signal processor, also at the signal emission process, according to described calibration factor, carrying out compensating coefficient, makes the amplitude-phase that sends radio-frequency channel consistent;

Described coupled signal processor, for receiving the time-domain response estimated value from the transmission radio-frequency channel of described calibrating signal processor

Or the estimated value of frequency domain response signal

Wherein, the time-domain response estimated value of described transmission radio-frequency channel

Or the estimated value of frequency domain response signal

By described calibrating signal processor, according to the described calibrating sequence that receives, calculate and obtain,

Described coupling data memory, read the receive path data according to the coupling network tables of data

k _a=1 ..., K _a, K _aFor the radio-frequency channel number,

Described coupled signal processor is also for receiving the described receive path data from described coupling data memory

And according to described

Right

Or

Revise, obtain the time-domain response corrected signal

With the frequency domain response corrected signal

Send to described calibrating signal processor.

The another aspect of the embodiment of the present invention has proposed a kind of device of antenna reception calibration, and this device comprises baseband signal processor, calibrating signal processor, coupled signal processor and coupling data memory,

Described calibrating signal processor, for by calibrated channel, sending calibrating sequence, described calibrating sequence arrives receiving RF channel through sending coupling network, and described calibrating signal processor need to judge whether compensation coupling network error according to sending the coupling network precision, by the described calibrating sequence that receives, calculate calibration factor, and send to described baseband signal processor;

Described baseband signal processor is for receiving described calibrating sequence by described receiving RF channel, and be transmitted to described calibrating signal processor, and described baseband signal processor carries out compensating coefficient according to described calibration factor in the signal receiving course, makes the amplitude-phase of receiving RF channel consistent;

Described coupled signal processor, for receiving the time-domain response estimated value from the receiving RF channel of described calibrating signal processor Or the estimated value of frequency domain response signal Wherein, described time-domain response estimated value Or the estimated value of frequency domain response signal

By described calibrating signal processor, according to the described calibrating sequence that receives, obtained;

Described coupling data memory, for reading the sendaisle data according to the coupling network tables of data k _a=1 ..., K _a, K _aFor the radio-frequency channel number,

Described coupled signal processor is also for receiving the described sendaisle data from described coupling data memory

And according to described Right

Or

Revise, obtain the time-domain response corrected signal

With the frequency domain response corrected signal

Send to described calibrating signal processor.

The such scheme that the present invention proposes, can, by in calibration, considering each interchannel error of coupling network, by coupling network is carried out to error compensation, thereby effectively improve the performance that the antenna calibration precision promotes wave beam forming.In addition, the such scheme that the present invention proposes, very little to the change of existing system, can not affect the compatibility of system, and realize simple, efficient.

The aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.

The accompanying drawing explanation

Above-mentioned and/or the additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments and obviously and easily understand, wherein:

Fig. 1 is the signal schematic representation of existing antenna calibration system;

Fig. 2 sends the FB(flow block) of the method for calibration according to the antenna of the embodiment of the present invention;

Fig. 3 is the signal flow graph according to the antenna calibration of the embodiment of the present invention;

Fig. 4 is the FB(flow block) according to the method for the antenna reception calibration of the embodiment of the present invention;

Fig. 5 sends the structural representation of calibrating installation according to the antenna of the embodiment of the present invention;

Fig. 6 is the structural representation according to the antenna reception calibrating installation of the embodiment of the present invention.

Embodiment

Below describe embodiments of the invention in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or the element with identical or similar functions from start to finish.Below by the embodiment that is described with reference to the drawings, be exemplary, only be used to explaining the present invention, and can not be interpreted as limitation of the present invention.

In order to realize the present invention's purpose, the invention discloses a kind of method that antenna sends calibration, Fig. 2 shows the FB(flow block) that antenna sends calibration steps, and the method comprises the following steps:

S201: baseband signal processor sends calibrating sequence by sending radio-frequency channel, and calibrating sequence arrives calibrated channel through receiving coupling network, and the calibrating signal processor receives described calibrating sequence by calibrated channel.

In conjunction with shown in Figure 3, baseband signal processor, through radio-frequency (RF) transceiver, sends the known calibration sequence by each transmission radio-frequency channel, road.Send radio-frequency channel and comprise that radio-frequency channel 1 is to radio-frequency channel Ka.Above-mentioned calibrating sequence arrives calibrated channel through receiving coupling network.As shown in FIG., receive coupling network and comprise coupler 1 to coupler Ka and coupling channel 1 to coupling channel Ka.The calibrating signal processor, through radio-frequency (RF) transceiver, receives calibrating sequence by above-mentioned calibrated channel.

S202: the calibrating signal processor need to judge whether compensation coupling network error according to receiving the coupling network precision, by the calibrating sequence that receives, calculates calibration factor, and sends to baseband signal processor.

At first, the calibrating signal processor calculates the time-domain response estimated value of each transmission radio-frequency channel, road according to the calibrating sequence that receives

Or the estimated value of frequency domain response signal

Wherein, k _a=1 ..., K _a, K _aExpression radio-frequency channel number, k=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.

The calibrating signal processor need to judge whether compensation coupling network error according to receiving the coupling network precision, when judgement does not need to compensate the coupling network error, and calibrating signal processor basis Or

Calculate calibration factor, and send to baseband signal processor.

When the judgement of calibrating signal processor needs compensation coupling network error, by the time-domain response estimated value of above-mentioned transmission radio-frequency channel

Or the estimated value of frequency domain response signal

Send to the coupled signal processor.The coupled signal processor sends to the coupling data memory by the coupling network data.Wherein, the coupling network data comprise the parameters such as boresight antenna type, calibration frequency, sending alignment sign.

The coupling data memory stores above-mentioned coupling network data in the coupling network tables of data into.The coupling network tables of data comprises following three kinds of forms.As shown in table 1, the channel impulse response value of coupling network Zhong Mei road reception coupling channel, according to antenna model, frequency range, transceiver channel type, gap marker corresponding stored, is formed to a data storage form.The Ka path channels impulse response value of a certain reception coupling channel of a certain frequency sub-band under the every delegation of form corresponding some day of line model.

Table 1.

Another kind of storage form is as shown in table 2, channel impulse response value corresponding to the high frequency points of Jiang Mei road coupling channel and minimum frequency, according to the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, each paths, each paths lowest frequency point value corresponding stored, forms data and stores form.

Table 2.

Table 3 shows the deviation of the high frequency points of benchmark coupling channel and the relatively described reference channel impulse response of channel impulse response Zhi,Ge road coupling channel value corresponding to minimum frequency according to the high frequency points of the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, reference channel, reference channel lowest frequency point value, each paths and benchmark frequency deviation, the minimum frequency of each paths and benchmark frequency deviation corresponding stored.

Table 3

Coupling network impulse response value can be carried out the off-line test acquisition to coupling calibration networks in present smart antenna product by antenna equipment manufacturer or communications equipment vendor.It is little that table 1 is applicable to the storage system bandwidth, i.e. the coupling network data of bandwidth≤2M.Because system bandwidth is narrow, can replace with the coupling network impulse response of single-frequency point the impulse response of whole bandwidth.But, for the broadband system of bandwidth >=10M, can't replace with the impulse response of single-frequency point coupling network the impulse response of whole bandwidth, if frequency can bring very large surveying work amount one by one, therefore should adopt the storage mode of table 2 or table 3, store the highest and minimum two frequency measurement data, other frequency point data adopts interpolation method to obtain.

If in order to save device memory, avoid the coupling network of storing storage list too large, also can define the coupling network channel error standard of, it is little on the calibration accuracy impact that all errors of coupling network less than this standard can be thought, do not need to carry out the coupling error compensation.For example defining the coupling network calibration error is 0.3dB, 2 °.When certain model antenna coupling network error, less than this standard, to the type antenna, can not be recorded in the coupling network storage list, in calibration, such coupler not carried out to error compensation.

In conjunction with shown in Figure 3, the coupling data memory reads the receive path data according to the coupling network tables of data of having stored

k _a=1 ..., K _a, K _aExpression radio-frequency channel number.And will Send to the coupled signal processor.

The coupled signal processor is according to the receive path data that receive

Right

Or

Revise, obtain the time-domain response corrected signal

Or frequency domain response corrected signal

Send to the calibrating signal processor.

Specifically, the coupled signal processor is to the time-domain response estimated value

Revise, obtain the time-domain response corrected signal

Comprise the steps:

${\tilde{h}}_{k_a}^t={\hat{h}}_{k_a}^t{\left(h_{k_a,\mathrm{CP}}^r\right)}^H/{\left(\right|\left|h_{k_a,\mathrm{CP}}^r\right|\left|\right)}^2,k_a=1,...,K_a.$

The coupled signal processor is by one of following two kinds of modes, to the estimated value of frequency domain response signal

Revise, obtain the frequency domain response corrected signal

Mode one: the coupled signal processor is first to the time-domain response estimated value

Revise acquisition

k _a=1 ..., K _a, K _aExpression radio-frequency channel number.Then right

Carry out the interpolation acquisition

N=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.Finally right

Carry out the FFT conversion and obtain the frequency domain response corrected signal ${\tilde{H}}_{k_a}^t\left(k\right),$ ${\tilde{H}}_{k_a}^t\left(k\right)=\mathrm{FFT}\left({\tilde{h}}_{k_a}^t\left(n\right)\right).$

Mode two: the coupled signal processor is at first by the coupling channel time-domain response

According to the calibration band width, carry out interpolation, transform to frequency domain and obtain the coupling channel frequency domain response

N=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.

Then according to the coupling channel frequency domain response

Estimated value to frequency-region signal

Revise, obtain the frequency domain response corrected signal

${\tilde{H}}_{k_a}^t\left(k\right)={\hat{H}}_{k_a}^t\left(k\right){\left(H_{k_a,\mathrm{CP}}^r\left(k\right)\right)}^H/{\left(\right|\left|H_{k_a,\mathrm{CP}}^r\left(k\right)\right|\left|\right)}^2.$

When coupling data memory feedback coupling channel data are empty, when namely the coupling network data in the coupling network tables of data are empty, show that this coupling channel affects and can ignore calibration accuracy, the coupled signal processor directly will Or

As

Or Do not deal with, send to the calibrating signal processor.That is, ${\tilde{h}}_{k_a}^t={\hat{h}}_{k_a}^t,{\tilde{H}}_{k_a}^t\left(k\right)={\hat{H}}_{k_a}^t\left(k\right).$

The time-domain response corrected signal that the coupled signal processor will obtain With the frequency domain response corrected signal Send to the calibrating signal processor.

Calibrating signal processor basis

With Calculate calibration factor, then calibration factor is sent to baseband signal processor.

The calibrating signal processor calculates the process of Time Domain Calibration coefficient, comprises the steps:

Sending the radio-frequency channel time-domain response is

K wherein _a=1 ..., K _aExpression radio-frequency channel number, basis

Can calculate and send radio-frequency channel Time Domain Calibration coefficient.

(1) power average value of Qiu Ge road radio frequency path:

$P_{\mathrm{mean}}=\frac{1}{K_a}\left(\underset{k_a=1}{\overset{K_a}{\mathrm{\Σ}}}{\left|\right|{\tilde{h}}_{k_a}^t\left|\right|}^2\right)$

(2) calculate the calibration factor on every link

For:

$c_{k_a}=\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)/{\tilde{h}}_{k_a}^t,k_a=1,...,K_a.$

The calibrating signal processor calculates the process of frequency domain calibration factor, comprises the steps:

Sending the radio-frequency channel frequency domain response is

K wherein _a=1 ..., K _a, K _aExpression radio-frequency channel number, k=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration, basis

Can calculate the frequency domain calibration factor that sends radio-frequency channel.

(1) mean value of the maximum sub-carrier power of Qiu Ge road radio frequency path:

Wherein || x|| ²The expression ask plural x mould square;

(2) calculate the calibration factor on every link

For:

$c_{k_a}\left(k\right)=\frac{\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)}{{\tilde{H}}_{k_a}^t\left(k\right)},k=1,...,N_{\mathrm{sc}},k_a=1,...,K_a$

S203: baseband signal processor carries out compensating coefficient according to calibration factor in the signal emission process, makes the amplitude-phase that sends radio-frequency channel consistent.

Baseband signal processor compensates according to the calibration factor that calculates in step 202, guarantees that the amplitude-phase of each transmission radio-frequency channel, road is consistent.

The embodiment of the present invention also provides a kind of method of antenna reception calibration, and in conjunction with shown in Figure 4, the method comprises the steps:

S401: the calibrating signal processor sends calibrating sequence by calibrated channel, and calibrating sequence arrives receiving RF channel through sending coupling network, and baseband signal processor receives calibrating sequence by receiving RF channel, and is transmitted to the calibrating signal processor.

In conjunction with shown in Figure 3, the calibrating signal processor, through radio-frequency (RF) transceiver, sends the known calibration sequence by calibrated channel.Above-mentioned calibrating sequence arrives receiving RF channel through sending coupling network.As shown in FIG., receive coupling network and comprise coupler 1 to coupler Ka and coupling channel 1 to coupling channel Ka.The calibrating signal processor, through radio-frequency (RF) transceiver, receives calibrating sequence by above-mentioned calibrated channel.Baseband signal processor receives calibrating sequence by each road receiving RF channel, and sends to the calibrating signal processor.

S402: the calibrating signal processor need to judge whether compensation coupling network error according to sending the coupling network precision, by the calibrating sequence that receives, calculates calibration factor, and sends to baseband signal processor.

At first calibrating signal is calculated the time-domain response estimated value of each road receiving RF channel according to the calibrating sequence that receives

Or the estimated value of frequency domain response signal

Wherein, k _a=1 ..., K _a, K _aExpression radio-frequency channel number, k=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.

The calibrating signal processor need to judge whether compensation coupling network error according to receiving the coupling network precision, when judgement does not need to compensate the coupling network error, and calibrating signal processor basis

Or

Calculate calibration factor, and send to baseband signal processor.

When the judgement of calibrating signal processor needs compensation coupling network error, by the time-domain response estimated value of above-mentioned receiving RF channel

Or the estimated value of frequency domain response signal

Send to the coupled signal processor.The coupling network data that the coupled signal processor will receive send to the coupling data memory.Wherein, the coupling network data comprise the parameters such as boresight antenna type, calibration frequency, sending alignment sign.

The coupling data memory stores above-mentioned coupling network data in the coupling network tables of data into.The coupling network tables of data comprises following three kinds of forms.As shown in table 1, the channel impulse response value of coupling network Zhong Mei road transmission coupling channel, according to antenna model, frequency range, transceiver channel type, gap marker corresponding stored, is formed to a data storage form.The Ka path channels impulse response value of a certain transmission coupling channel of a certain frequency sub-band under the every delegation of form corresponding some day of line model.

Another kind of storage form is as shown in table 2, channel impulse response value corresponding to the high frequency points of Jiang Mei road coupling channel and minimum frequency, according to the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, each paths, each paths lowest frequency point value corresponding stored, forms data and stores form.

Table 3 shows the deviation of the high frequency points of benchmark coupling channel and the relatively described reference channel impulse response of channel impulse response Zhi,Ge road coupling channel value corresponding to minimum frequency according to the high frequency points of the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, reference channel, reference channel lowest frequency point value, each paths and benchmark frequency deviation, the minimum frequency of each paths and benchmark frequency deviation corresponding stored.

Coupling network impulse response value can be carried out the off-line test acquisition to coupling calibration networks in present smart antenna product by antenna equipment manufacturer or communications equipment vendor.It is little that table 1 is applicable to the storage system bandwidth, i.e. the coupling network data of bandwidth≤2M.Because system bandwidth is narrow, can replace with the coupling network impulse response of single-frequency point the impulse response of whole bandwidth.But, for the broadband system of bandwidth >=10M, can't replace with the impulse response of single-frequency point coupling network the impulse response of whole bandwidth, if frequency can bring very large surveying work amount one by one, therefore should adopt the storage mode of table 2 or table 3, store the highest and minimum two frequency measurement data, other frequency point data adopts interpolation method to obtain.

If in order to save device memory, avoid the coupling network of storing storage list too large, also can define the coupling network channel error standard of, it is little on the calibration accuracy impact that all errors of coupling network less than this standard can be thought, do not need to carry out the coupling error compensation.For example defining the coupling network calibration error is 0.3dB, 2 °.When certain model antenna coupling network error, less than this standard, to the type antenna, can not be recorded in the coupling network storage list, in calibration, such coupler not carried out to error compensation.

In conjunction with shown in Figure 3, the coupling data memory reads the sendaisle data according to the coupling network tables of data of having stored

K _aExpression radio-frequency channel number.And will

Send to the coupled signal processor.

The coupled signal processor is according to the sendaisle data that receive

Right

Or

Revise, obtain the time-domain response corrected signal Or frequency domain response corrected signal

Send to the calibrating signal processor.

Specifically, the coupled signal processor is to the time-domain response estimated value

Revise, obtain the time-domain response corrected signal

Comprise the steps:

${\tilde{h}}_{k_a}^r={\hat{h}}_{k_a}^r{\left(h_{k_a,\mathrm{CP}}^t\right)}^H/{\left(\right|\left|h_{k_a,\mathrm{CP}}^t\right|\left|\right)}^2,k_a=1,...,K_a.$

The coupled signal processor is by one of following two kinds of modes, to the estimated value of frequency domain response signal Revise, obtain the frequency domain response corrected signal

Mode one: the coupled signal processor is at first to the time-domain response estimated value

Revise acquisition

k _a=1 ..., K _a, K _aExpression radio-frequency channel number.Then to the time-domain response corrected signal

Carry out the interpolation acquisition N=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.Finally right

Carry out the FFT conversion and obtain the frequency domain response corrected signal ${\tilde{H}}_{k_a}^r\left(k\right)=\mathrm{FFT}\left({\tilde{h}}_{k_a}^r\left(n\right)\right).$

Mode two: the coupled signal processor is at first by the coupling channel time-domain response

According to the calibration band width, carrying out interpolation obtains

N=1 ..., N _Sc, transform to frequency domain and obtain the coupling channel frequency domain response $H_{k_a,\mathrm{CP}}^t\left(k\right),$

K=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.

Then according to the coupling channel frequency domain response

Estimated value to frequency-region signal Revise, obtain the frequency domain response corrected signal

${\tilde{H}}_{k_a}^r\left(k\right)={\hat{H}}_{k_a}^r\left(k\right){\left(H_{k_a,\mathrm{CP}}^t\left(k\right)\right)}^H/{\left(\right|\left|H_{k_a,\mathrm{CP}}^t\left(k\right)\right|\left|\right)}^2.$

When coupling data memory feedback coupling channel data are empty, when namely the coupling network data in the coupling network tables of data are empty, show that this coupling channel affects and can ignore calibration accuracy, the coupled signal processor directly will Or

As Or

Do not deal with, send to the calibrating signal processor.That is, ${\tilde{h}}_{k_a}^r={\hat{h}}_{k_a}^r,{\tilde{H}}_{k_a}^r\left(k\right)={\hat{H}}_{k_a}^r\left(k\right).$

The time-domain response corrected signal that the coupled signal processor will obtain

With the frequency domain response corrected signal

Send to the calibrating signal processor.

Calibrating signal processor basis

With Calculate calibration factor, then calibration factor is sent to baseband signal processor.

The calibrating signal processor calculates the process of Time Domain Calibration coefficient, comprises the steps:

The receiving RF channel time-domain response is

K wherein _a=1 ..., K _aExpression radio-frequency channel number, basis

Can calculate receiving RF channel Time Domain Calibration coefficient.

(1) power average value of Qiu Ge road radio frequency path:

$P_{\mathrm{mean}}=\frac{1}{K_a}\left(\underset{k_a=1}{\overset{K_a}{\mathrm{\Σ}}}{\left|\right|{\tilde{h}}_{k_a}^r\left|\right|}^2\right)$

(2) calculate the calibration factor on every link

For:

$c_{k_a}=\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)/{\tilde{h}}_{k_a}^r,k_a=1,...,K_a.$

The calibrating signal processor calculates the process of frequency domain calibration factor, comprises the steps: that the receiving RF channel frequency domain response is

K wherein _a=1 ..., K _a, K _aExpression radio-frequency channel number, k=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration, basis Can calculate the frequency domain calibration factor of receiving RF channel.

(1) mean value of the maximum sub-carrier power of Qiu Ge road radio frequency path:

Wherein || x|| ²The expression ask plural x mould square;

(2) calculate the calibration factor on every link

For:

$c_{k_a}\left(k\right)=\frac{\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)}{{\tilde{H}}_{k_a}^r\left(k\right)},k=1,...,N_{\mathrm{sc}},k_a=1,...,K_a$

S403: baseband signal processor carries out compensating coefficient according to calibration factor in the signal receiving course, makes the amplitude-phase of receiving RF channel consistent.

Baseband signal processor compensates according to the calibration factor that calculates in step 402, guarantees that the amplitude-phase of each road receiving RF channel is consistent.

The said method that the present invention proposes, can, by in calibration, considering each interchannel error of coupling network, by coupling network is carried out to error compensation, thereby effectively improve the performance that the antenna calibration precision promotes wave beam forming.In addition, the said method that the present invention proposes, very little to the change of existing system, can not affect the compatibility of system, and realize simple, efficient.

The embodiment of the present invention further provides a kind of antenna to send the device of calibration, and as shown in Figure 5, this device 500 comprises baseband signal processor 510 and calibrating signal processor 520.In conjunction with shown in Figure 3, baseband signal processor 510, for through radio-frequency (RF) transceiver, sends the known calibration sequence by each transmission radio-frequency channel, road, and calibrating sequence arrives calibrated channel through receiving coupling network.

Calibrating signal processor 520 is for receiving calibrating sequence by calibrated channel.Calibrating signal processor 520 calculates the time-domain response estimated value of each transmission radio-frequency channel, road according to the calibrating sequence that receives

Or the estimated value of frequency domain response signal

Wherein, k _a=1 ..., K _a, K _aExpression radio-frequency channel number, k=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.

And calibrating signal processor 520 need to judge whether compensation coupling network error according to receiving the coupling network precision, when judgement does not need to compensate the coupling network error, and calibrating signal processor basis Or

Calculate calibration factor, and send to baseband signal processor 510.

In conjunction with shown in Figure 5, the device 500 that antenna sends calibration also comprises coupled signal processor 530 and coupling data memory 540.

When 520 judgements of calibrating signal processor need compensation coupling network error, by the time-domain response estimated value of above-mentioned transmission radio-frequency channel

Or the estimated value of frequency domain response signal

Send to coupled signal processor 530.The coupling network data that coupled signal processor 530 will receive send to coupling data memory 540.Coupling data memory 540 stores above-mentioned coupling network data in the coupling network tables of data into.

The coupling data memory stores above-mentioned coupling network data in the coupling network tables of data into.The coupling network tables of data comprises following three kinds of forms.As shown in table 1, the channel impulse response value of coupling network Zhong Mei road reception coupling channel, according to antenna model, frequency range, transceiver channel type, gap marker corresponding stored, is formed to a data storage form.The Ka path channels impulse response value of a certain reception coupling channel of a certain frequency sub-band under the every delegation of form corresponding some day of line model.

Another kind of storage form is as shown in table 2, channel impulse response value corresponding to the high frequency points of Jiang Mei road coupling channel and minimum frequency, according to the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, each paths, each paths lowest frequency point value corresponding stored, forms data and stores form.

Table 3 shows the deviation of the high frequency points of benchmark coupling channel and the relatively described reference channel impulse response of channel impulse response Zhi,Ge road coupling channel value corresponding to minimum frequency according to the high frequency points of the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, reference channel, reference channel lowest frequency point value, each paths and benchmark frequency deviation, the minimum frequency of each paths and benchmark frequency deviation corresponding stored.

Coupling data memory 540, for receiving the coupling network data from coupled signal processor 530, and read the receive path data according to the coupling network tables of data

k _a=1 ..., K _a, K _aExpression radio-frequency channel number.

In conjunction with shown in Figure 3, coupled signal processor 530 is also for receiving the receive path data from coupling data memory 540 And according to

Right Or

Revise, obtain the time-domain response corrected signal

With the frequency domain response corrected signal

Send to calibrating signal processor 520.

Specifically, 530 pairs of time-domain response estimated values of coupled signal processor Revise, obtain the time-domain response corrected signal

${\tilde{h}}_{k_a}^t={\hat{h}}_{k_a}^t{\left(h_{k_a,\mathrm{CP}}^r\right)}^H/{\left(\right|\left|h_{k_a,\mathrm{CP}}^r\right|\left|\right)}^2,k_a=1,...,K_a.$

Coupled signal processor 530 is by one of following two kinds of modes, to the estimated value of frequency domain response signal

Revise, obtain the frequency domain response corrected signal

Mode one: coupled signal processor 530 is first to the time-domain response estimated value

Revise acquisition

k _a=1 ..., K _a, K _aExpression radio-frequency channel number.Then right

Carry out the interpolation acquisition

N=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.Finally right Carry out the FFT conversion and obtain the frequency domain response corrected signal ${\tilde{H}}_{k_a}^t\left(k\right),$ ${\tilde{H}}_{k_a}^t\left(k\right)=\mathrm{FFT}\left({\tilde{h}}_{k_a}^t\left(n\right)\right).$

Mode two: coupled signal processor 530 is at first by the coupling channel time-domain response

According to the calibration band width, carry out interpolation, transform to frequency domain and obtain the coupling channel frequency domain response

N=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.

Then according to the coupling channel frequency domain response

Estimated value to frequency-region signal Revise, obtain the frequency domain response corrected signal

${\tilde{H}}_{k_a}^t\left(k\right)={\hat{H}}_{k_a}^t\left(k\right){\left(H_{k_a,\mathrm{CP}}^r\left(k\right)\right)}^H/{\left(\right|\left|H_{k_a,\mathrm{CP}}^r\left(k\right)\right|\left|\right)}^2.$

When coupling data memory 540 feedback coupling channel data are empty, when namely the coupling network data in the coupling network tables of data are empty, show that this coupling channel affects and can ignore calibration accuracy, coupled signal processor 530 directly will

Or

As

Or Do not deal with, send to calibrating signal processor 520.That is, ${\tilde{h}}_{k_a}^t={\hat{h}}_{k_a}^t,{\tilde{H}}_{k_a}^t\left(k\right)={\hat{H}}_{k_a}^t\left(k\right).$

The time-domain response corrected signal that coupled signal processor 530 will obtain With the frequency domain response corrected signal

Send to calibrating signal processor 520.

Calibrating signal processor 520 bases With

Calculate calibration factor, then calibration factor is sent to baseband signal processor 510.

Calibrating signal processor 520 calculates the Time Domain Calibration coefficient by following steps, sends the radio-frequency channel time-domain response to be

K wherein _a=1 ..., K _aExpression radio-frequency channel number, calibrating signal processor 520 bases

Can calculate and send radio-frequency channel Time Domain Calibration coefficient.

(1) power average value of Qiu Ge road radio frequency path:

$P_{\mathrm{mean}}=\frac{1}{K_a}\left(\underset{k_a=1}{\overset{K_a}{\mathrm{\Σ}}}{\left|\right|{\tilde{h}}_{k_a}^t\left|\right|}^2\right)$

(2) calculate the calibration factor on every link For:

$c_{k_a}=\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)/{\tilde{h}}_{k_a}^t,k_a=1,...,K_a.$

Calibrating signal processor 520 calculates the frequency domain calibration factor by following steps, sends the radio-frequency channel frequency domain response to be

K wherein _a=1 ..., K _a, K _aExpression radio-frequency channel number, k=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration, calibrating signal processor 520 bases Can calculate the frequency domain calibration factor that sends radio-frequency channel.

(1) mean value of the maximum sub-carrier power of Qiu Ge road radio frequency path:

Wherein || x|| ²The expression ask plural x mould square;

(2) calculate the calibration factor on every link

For:

$c_{k_a}\left(k\right)=\frac{\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)}{{\tilde{H}}_{k_a}^t\left(k\right)},k=1,...,N_{\mathrm{sc}},k_a=1,...,K_a$

Baseband signal processor 510 calculates according to calibrating signal processor 520 in the signal emission process calibration factor carries out compensating coefficient, makes the amplitude-phase that sends radio-frequency channel consistent.

The embodiment of the present invention also provides a kind of antenna reception calibrating installation, and as shown in Figure 6, this device 600 comprises baseband signal processor 610 and calibrating signal processor 620.In conjunction with shown in Figure 3, calibrating signal processor 620, for through radio-frequency (RF) transceiver, sends calibrating sequence by calibrated channel, and calibrating sequence arrives receiving RF channel through sending coupling network.Baseband signal processor 610, for through radio-frequency (RF) transceiver, receives calibrating sequence by receiving RF channel, and is transmitted to calibrating signal processor 620.

Calibrating signal processor 620 calculates the time-domain response estimated value of receiving RF channel according to the calibrating sequence that receives

Or the estimated value of frequency domain response signal

Wherein, k _a=1 ..., K _a, K _aExpression radio-frequency channel number, k=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.

And calibrating signal processor 620 need to judge whether compensation coupling network error according to sending the coupling network precision, when judgement does not need to compensate the coupling network error, and calibrating signal processor 620 bases

Or Calculate calibration factor, and send to baseband signal processor 610.

In conjunction with shown in Figure 6, the device 600 of antenna reception calibration also comprises coupled signal processor 630 and coupling data memory 640.

When 620 judgements of calibrating signal processor need compensation coupling network error, by the time-domain response estimated value of above-mentioned transmission radio-frequency channel

Or the estimated value of frequency domain response signal Send to coupled signal processor 630.The coupling network data that coupled signal processor 630 will receive send to coupling data memory 640.Coupling data memory 640 stores above-mentioned coupling network data in the coupling network tables of data into.

The coupling data memory stores above-mentioned coupling network data in the coupling network tables of data into.The coupling network tables of data comprises following three kinds of forms.As shown in table 1, the channel impulse response value of coupling network Zhong Mei road transmission coupling channel, according to antenna model, frequency range, transceiver channel type, gap marker corresponding stored, is formed to a data storage form.The Ka path channels impulse response value of a certain transmission coupling channel of a certain frequency sub-band under the every delegation of form corresponding some day of line model.

Another kind of storage form is as shown in table 2, channel impulse response value corresponding to the high frequency points of Jiang Mei road coupling channel and minimum frequency, according to the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, each paths, each paths lowest frequency point value corresponding stored, forms data and stores form.

Table 3 shows the deviation of the high frequency points of benchmark coupling channel and the relatively described reference channel impulse response of channel impulse response Zhi,Ge road coupling channel value corresponding to minimum frequency according to the high frequency points of the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, reference channel, reference channel lowest frequency point value, each paths and benchmark frequency deviation, the minimum frequency of each paths and benchmark frequency deviation corresponding stored.

Coupling data memory 640, for receiving the coupling network data from coupled signal processor 630, and read the sendaisle data according to storage coupling network tables of data

k _a=1 ..., K _a, K _aExpression radio-frequency channel number.

In conjunction with shown in Figure 3, coupled signal processor 630 is also for receiving the sendaisle data from coupling data memory 640

And according to

Right

Or Revise, obtain the time-domain response corrected signal

With the frequency domain response corrected signal Send to calibrating signal processor 620.

Specifically, 630 pairs of time-domain response estimated values of coupled signal processor

Revise, obtain the time-domain response corrected signal

${\tilde{h}}_{k_a}^r={\hat{h}}_{k_a}^r{\left(h_{k_a,\mathrm{CP}}^t\right)}^H/{\left(\right|\left|h_{k_a,\mathrm{CP}}^t\right|\left|\right)}^2,k_a=1,...,K_a.$

Coupled signal processor 630 is by one of following two kinds of modes, to the estimated value of frequency domain response signal

Revise, obtain the frequency domain response corrected signal

Mode one: coupled signal processor 630 is at first to the time-domain response estimated value Revise acquisition

k _a=1 ..., K _a, K _aExpression radio-frequency channel number.Then to the time-domain response corrected signal Carry out the interpolation acquisition N=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.Finally right

Carry out the FFT conversion and obtain the frequency domain response corrected signal

${\tilde{H}}_{k_a}^r\left(k\right)=\mathrm{FFT}\left({\tilde{h}}_{k_a}^r\left(n\right)\right).$

Mode two: coupled signal processor 630 is at first by the coupling channel time-domain response

According to the calibration band width, carrying out interpolation obtains

N=1 ..., N _Sc, transform to frequency domain and obtain the coupling channel frequency domain response $H_{k_a,\mathrm{CP}}^t\left(k\right),$

K=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration.

Then according to the coupling channel frequency domain response

Estimated value to frequency-region signal

Revise, obtain the frequency domain response corrected signal

${\tilde{H}}_{k_a}^r\left(k\right)={\hat{H}}_{k_a}^r\left(k\right){\left(H_{k_a,\mathrm{CP}}^t\left(k\right)\right)}^H/{\left(\right|\left|H_{k_a,\mathrm{CP}}^t\left(k\right)\right|\left|\right)}^2.$

When coupling data memory 640 feedback coupling channel data are empty, when namely the coupling network data in the coupling network tables of data are empty, show that this coupling channel affects and can ignore calibration accuracy, coupled signal processor 630 directly will

Or

As

Or

Do not deal with, send to calibrating signal processor 620.That is, ${\tilde{h}}_{k_a}^r={\hat{h}}_{k_a}^r,{\tilde{H}}_{k_a}^r\left(k\right)={\hat{H}}_{k_a}^r\left(k\right).$

The time-domain response corrected signal that coupled signal processor 630 will obtain With the frequency domain response corrected signal

Send to calibrating signal processor 620.

Calibrating signal processor 620 bases

With

Calculate calibration factor, then calibration factor is sent to baseband signal processor 610.

Calibrating signal processor 620 calculates the Time Domain Calibration coefficient by following steps, and the receiving RF channel time-domain response is

K wherein _a=1 ..., K _aExpression radio-frequency channel number, basis

Can calculate and send radio-frequency channel Time Domain Calibration coefficient.

(1) power average value of Qiu Ge road radio frequency path:

$P_{\mathrm{mean}}=\frac{1}{K_a}\left(\underset{k_a=1}{\overset{K_a}{\mathrm{\Σ}}}{\left|\right|{\tilde{h}}_{k_a}^r\left|\right|}^2\right)$

(2) calculate the calibration factor on every link For:

$c_{k_a}=\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)/{\tilde{h}}_{k_a}^r,k_a=1,...,K_a.$

Calibrating signal processor 620 calculates the process of frequency domain calibration factor, comprises the steps: that the receiving RF channel frequency domain response is

K wherein _a=1 ..., K _a, K _aExpression radio-frequency channel number, k=1 ..., N _Sc, N _ScThe sub-carrier number of expression frequency domain calibration, basis

Can calculate the frequency domain calibration factor of receiving RF channel.

(1) mean value of the maximum sub-carrier power of Qiu Ge road radio frequency path:

Wherein || x|| ²The expression ask plural x mould square;

(2) calculate the calibration factor on every link

For:

$c_{k_a}\left(k\right)=\frac{\mathrm{sqrt}\left(P_{\mathrm{mean}}\right)}{{\tilde{H}}_{k_a}^r\left(k\right)},k=1,...,N_{\mathrm{sc}},k_a=1,...,K_a.$

Baseband signal processor 610 calculates according to calibrating signal processor 620 in the signal receiving course calibration factor carries out compensating coefficient, makes the amplitude-phase of receiving RF channel consistent.

The said equipment that the present invention proposes, can, by in calibration, considering each interchannel error of coupling network, by coupling network is carried out to error compensation, thereby effectively improve the performance that the antenna calibration precision promotes wave beam forming.In addition, the said equipment that the present invention proposes, very little to the change of existing system, can not affect the compatibility of system, and realize simple, efficient.

In application the time of the present invention, said method realizes usually in access network equipment, and above-mentioned antenna sends calibrating installation and/or antenna reception calibrating installation and usually is presented as base station or similar access network equipment.

One of ordinary skill in the art will appreciate that and realize that all or part of step that above-described embodiment carries is to come the hardware that instruction is relevant to complete by program, described program can be stored in a kind of computer-readable recording medium, this program, when carrying out, comprises step of embodiment of the method one or a combination set of.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing module, can be also that the independent physics of unit exists, and also can be integrated in a module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module usings that the form of software function module realizes and during as production marketing independently or use, also can be stored in a computer read/write memory medium.

The above-mentioned storage medium of mentioning can be read-only memory, disk or CD etc.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (18)

1. an antenna sends the method for calibrating, and it is characterized in that, comprises the following steps:

Baseband signal processor sends calibrating sequence by sending radio-frequency channel, and described calibrating sequence arrives calibrated channel through receiving coupling network, and the calibrating signal processor receives described calibrating sequence by described calibrated channel;

Described calibrating signal processor need to judge whether compensation coupling network error according to receiving the coupling network precision, by the described calibrating sequence that receives, calculates calibration factor, and sends to described baseband signal processor;

Described baseband signal processor carries out compensating coefficient according to described calibration factor in the signal emission process, make the amplitude-phase that sends radio-frequency channel consistent;

When described calibrating signal processor judgement needs compensation coupling network error, by the described calibrating sequence that receives, calculate calibration factor and comprise the following steps:

Described calibrating signal processor calculates the time-domain response estimated value of described transmission radio-frequency channel according to the described calibrating sequence that receives

Or the estimated value of frequency domain response signal

And send to the coupled signal processor, and wherein, k _a=1 ..., K _a, K _aFor the radio-frequency channel number, k=1 ..., N _Sc, N _ScSub-carrier number for the frequency domain calibration;

Described calibrating signal processor is by the time-domain response estimated value of described transmission radio-frequency channel

Or the estimated value of frequency domain response signal Send to the coupled signal processor;

The coupling data memory reads the receive path data according to the coupling network tables of data Described coupling data memory is by described receive path data

Send to described coupled signal processor;

Described coupled signal processor is according to the described receive path data that receive Right

Or Revise, obtain the time-domain response corrected signal

With the frequency domain response corrected signal Send to described calibrating signal processor;

Described calibrating signal processor is according to described With Calculate calibration factor, described calibration factor is sent to described baseband signal processor.

2. transmission calibration steps as claimed in claim 1, it is characterized in that, the storage format of described coupling network tables of data is: will receive the impulse response value of coupling network Zhong Mei road coupling channel according to antenna model, frequency range, transceiver channel type and channel number corresponding stored.

3. transmission calibration steps as claimed in claim 1, it is characterized in that, the storage format of described coupling network tables of data is: channel impulse response value corresponding to the high frequency points of Jiang Mei road coupling channel and minimum frequency is according to the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, passage, passage lowest frequency point value corresponding stored.

4. transmission calibration steps as claimed in claim 1, it is characterized in that, the storage format of described coupling network tables of data is: by the deviation of the high frequency points of benchmark coupling channel and channel impulse response Zhi,Ge road coupling channel relative datum passage impulse response value corresponding to minimum frequency according to the high frequency points of the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, reference channel, reference channel lowest frequency point value, passage and benchmark frequency deviation, the minimum frequency of passage and benchmark frequency deviation corresponding stored.

5. transmission calibration steps as claimed in claim 1, is characterized in that, described coupled signal processor is to the time-domain response estimated value Revise, obtain the time-domain response corrected signal

Comprise the steps:

${\tilde{h}}_{k_a}^t={\hat{h}}_{k_a}^t{\left(h_{k_a,\mathrm{CP}}^r\right)}^H/{\left(\right|\left|h_{k_a,\mathrm{CP}}^r\right|\left|\right)}^2,k_a=1,...,K_a.$

6. transmission calibration steps as claimed in claim 1, is characterized in that, described coupled signal processor is one of in the following manner to the estimated value of frequency domain response signal Revise, obtain the frequency domain response corrected signal

To described time-domain response estimated value Revise acquisition

k _a=1 ..., K _a, K _aFor the radio-frequency channel number, to described time-domain response corrected signal Carry out the interpolation acquisition

N=1 ..., N _Sc, N _ScFor the sub-carrier number of frequency domain calibration, to described

Carry out the FFT conversion and obtain the frequency domain response corrected signal

${\tilde{H}}_{k_a}^t\left(k\right)=\mathrm{FFT}\left({\tilde{h}}_{k_a}^t\left(n\right)\right);$

By the coupling channel time-domain response According to the calibration band width, carry out interpolation, transform to frequency domain and obtain the coupling channel frequency domain response

N=1 ..., N _Sc, N _ScFor the sub-carrier number of frequency domain calibration, according to described coupling channel frequency domain response

Estimated value to frequency-region signal

Revise, obtain the frequency domain response corrected signal

${\tilde{H}}_{k_a}^t\left(k\right)={\hat{H}}_{k_a}^t\left(k\right){\left(H_{k_a,\mathrm{CP}}^r\left(k\right)\right)}^H/{\left(\right|\left|H_{k_a,\mathrm{CP}}^r\left(k\right)\right|\left|\right)}^2.$

7. the method for an antenna reception calibration, is characterized in that, comprises the following steps:

The calibrating signal processor sends calibrating sequence by calibrated channel, described calibrating sequence arrives receiving RF channel through sending coupling network, baseband signal processor receives described calibrating sequence by described receiving RF channel, and is transmitted to described calibrating signal processor;

Described calibrating signal processor need to judge whether compensation coupling network error according to sending the coupling network precision, by the described calibrating sequence that receives, calculates calibration factor, and sends to described baseband signal processor;

Described baseband signal processor carries out compensating coefficient according to described calibration factor in the signal receiving course, make the amplitude-phase of receiving RF channel consistent;

When described calibrating signal processor judgement needs compensation coupling network error, by the described calibrating sequence that receives, calculate calibration factor and comprise the following steps:

Described calibrating signal processor calculates the time-domain response estimated value of described receiving RF channel according to the described calibrating sequence that receives

Or the estimated value of frequency domain response signal

And send to the coupled signal processor, and wherein, k _a=1 ..., K _a, K _aFor the radio-frequency channel number, k=1 ..., N _Sc, N _ScSub-carrier number for the frequency domain calibration;

The coupling data memory reads the sendaisle data according to the coupling network tables of data Described coupling data memory is by described sendaisle data

Send to described coupled signal processor;

Described coupled signal processor is according to the described sendaisle data that receive Right Or

Revise, obtain the time-domain response corrected signal

With the frequency domain response corrected signal

Send to described calibrating signal processor,

Described calibrating signal processor is according to described

With

Calculate calibration factor, described calibration factor is sent to described baseband signal processor.

8. the method for reception as claimed in claim 7 calibration, it is characterized in that, the storage format of described coupling network tables of data is: will send the impulse response value of coupling network Zhong Mei road coupling channel according to antenna model, frequency range, transceiver channel type and channel number corresponding stored.

9. the method for reception as claimed in claim 7 calibration, it is characterized in that, the storage format of described coupling network tables of data is: channel impulse response value corresponding to the high frequency points of Jiang Mei road coupling channel and minimum frequency is according to the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, passage, passage lowest frequency point value corresponding stored.

10. the method for reception as claimed in claim 7 calibration, it is characterized in that, the storage format of described coupling network tables of data is: by the deviation of the high frequency points of benchmark coupling channel and channel impulse response Zhi,Ge road coupling channel relative datum passage impulse response value corresponding to minimum frequency according to the high frequency points of the high frequency point value of antenna model, high frequency points, minimum frequency, transmitting-receiving type, reference channel, reference channel lowest frequency point value, passage and benchmark frequency deviation, the minimum frequency of passage and benchmark frequency deviation corresponding stored.

11. the method for reception calibration as claimed in claim 7 is characterized in that described coupled signal processor is to the time-domain response estimated value

Revise, obtain the time-domain response corrected signal

Comprise the steps:

${\tilde{h}}_{k_a}^r={\hat{h}}_{k_a}^r{\left(h_{k_a,\mathrm{CP}}^t\right)}^H/{\left(\right|\left|h_{k_a,\mathrm{CP}}^t\right|\left|\right)}^2,k_a=1,...,K_a.$

12. the method for reception as claimed in claim 7 calibration, is characterized in that, described coupled signal processor is one of in the following manner to the estimated value of frequency domain response signal Revise, obtain the frequency domain response corrected signal

First to described time-domain response estimated value

Revise acquisition

k _a=1 ..., K _a, K _aFor the radio-frequency channel number, to described time-domain response corrected signal

Carry out the interpolation acquisition

N=1 ..., N _Sc, N _ScFor the sub-carrier number of frequency domain calibration, to described

Carry out the FFT conversion and obtain the frequency domain response corrected signal ${\tilde{H}}_{k_a}^r\left(k\right),$ ${\tilde{H}}_{k_a}^r\left(k\right)=\mathrm{FFT}\left({\tilde{h}}_{k_a}^r\left(n\right)\right);$

By the coupling channel time-domain response

According to the calibration band width, carrying out interpolation obtains

N=1 ..., N _Sc, transform to frequency domain and obtain the coupling channel frequency domain response

According to described coupling channel frequency domain response Estimated value to frequency-region signal

Revise, obtain the frequency domain response corrected signal

${\tilde{H}}_{k_a}^r\left(k\right)={\hat{H}}_{k_a}^r\left(k\right){\left(H_{k_a,\mathrm{CP}}^t\left(k\right)\right)}^H/{\left(\right|\left|H_{k_a,\mathrm{CP}}^t\left(k\right)\right|\left|\right)}^2.$

13. an antenna sends the device of calibration, it is characterized in that, comprises baseband signal processor, calibrating signal processor, coupled signal processor and coupling data memory,

Described baseband signal processor, for by sending radio-frequency channel, sending calibrating sequence, described calibrating sequence arrives calibrated channel through receiving coupling network;

Described calibrating signal processor, for by described calibrated channel, receiving described calibrating sequence, and described calibrating signal processor need to judge whether compensation coupling network error according to receiving the coupling network precision, by the described calibrating sequence that receives, calculate calibration factor, and send to described baseband signal processor;

Described baseband signal processor, also at the signal emission process, according to described calibration factor, carrying out compensating coefficient, makes the amplitude-phase that sends radio-frequency channel consistent; Described coupled signal processor, for receiving the time-domain response estimated value from the transmission radio-frequency channel of described calibrating signal processor

Or the estimated value of frequency domain response signal

Wherein, the time-domain response estimated value of described transmission radio-frequency channel

Or the estimated value of frequency domain response signal

By described calibrating signal processor, according to the described calibrating sequence that receives, calculate and obtain,

Described coupling data memory, read the receive path data according to the coupling network tables of data

k _a=1 ..., K _a, K _aFor the radio-frequency channel number,

Described coupled signal processor is also for receiving the described receive path data from described coupling data memory And according to described

Right

Or

Revise, obtain the time-domain response corrected signal

With the frequency domain response corrected signal

Send to described calibrating signal processor.

14. the device of transmission calibration as claimed in claim 13 is characterized in that described coupled signal processor is to the time-domain response estimated value

Revise, obtain the time-domain response corrected signal

${\tilde{h}}_{k_a}^t={\hat{h}}_{k_a}^t{\left(h_{k_a,\mathrm{CP}}^r\right)}^H/{\left(\right|\left|h_{k_a,\mathrm{CP}}^r\right|\left|\right)}^2,k_a=1,...,K_a.$

15. the device of transmission as claimed in claim 13 calibration, is characterized in that, described coupled signal processor obtains one of in the following manner the frequency domain response corrected signal

To described time-domain response estimated value Revise acquisition

k _a=1 ..., K _a, K _aFor the radio-frequency channel number, described coupled signal processor is to described time-domain response corrected signal

Carry out the interpolation acquisition

N=1 ..., N _Sc, N _ScFor the sub-carrier number of frequency domain calibration, described coupled signal processor is to described

Carry out the FFT conversion and obtain the frequency domain response corrected signal

By the coupling channel time-domain response

According to the calibration band width, carry out interpolation, transform to frequency domain and obtain the coupling channel frequency domain response

N=1 ..., N _Sc, N _ScFor the sub-carrier number of frequency domain calibration, described coupled signal processor is according to described coupling channel frequency domain response Estimated value to frequency-region signal

Revise, ${\tilde{H}}_{k_a}^t\left(k\right)={\hat{H}}_{k_a}^t\left(k\right){\left(H_{k_a,\mathrm{CP}}^r\left(k\right)\right)}^H/{\left(\right|\left|H_{k_a,\mathrm{CP}}^r\left(k\right)\right|\left|\right)}^2,$ Obtain the frequency domain response corrected signal ${\tilde{H}}_{k_a}^t\left(k\right).$

16. the device of an antenna reception calibration, is characterized in that, comprises baseband signal processor, calibrating signal processor, coupled signal processor and coupling data memory,

Described calibrating signal processor, for by calibrated channel, sending calibrating sequence, described calibrating sequence arrives receiving RF channel through sending coupling network, and described calibrating signal processor need to judge whether compensation coupling network error according to sending the coupling network precision, by the described calibrating sequence that receives, calculate calibration factor, and send to described baseband signal processor;

Described baseband signal processor is for receiving described calibrating sequence by described receiving RF channel, and be transmitted to described calibrating signal processor, and described baseband signal processor carries out compensating coefficient according to described calibration factor in the signal receiving course, makes the amplitude-phase of receiving RF channel consistent;

Described coupled signal processor, for receiving the time-domain response estimated value from the receiving RF channel of described calibrating signal processor

Or the estimated value of frequency domain response signal

Wherein, described time-domain response estimated value

Or the estimated value of frequency domain response signal

By described calibrating signal processor, according to the described calibrating sequence that receives, obtained;

Described coupling data memory, for reading the sendaisle data according to the coupling network tables of data

k _a=1 ..., K _a, K _aFor the radio-frequency channel number,

Described coupled signal processor is also for receiving the described sendaisle data from described coupling data memory

And according to described Right

Or

Revise, obtain the time-domain response corrected signal With the frequency domain response corrected signal

Send to described calibrating signal processor.

17. the device of reception calibration as claimed in claim 16 is characterized in that described coupled signal processor is to the time-domain response estimated value

Revise, obtain the time-domain response corrected signal

${\tilde{h}}_{k_a}^r={\hat{h}}_{k_a}^r{\left(h_{k_a,\mathrm{CP}}^t\right)}^H/{\left(\right|\left|h_{k_a,\mathrm{CP}}^t\right|\left|\right)}^2,k_a=1,...,K_a.$

18. the device of reception as claimed in claim 16 calibration, is characterized in that, described coupled signal processor one of in the following manner, obtains the frequency domain response corrected signal

To described time-domain response estimated value

Revise, obtain

k _a=1 ..., K _a, K _aFor the radio-frequency channel number, described coupled signal processor is to described time-domain response corrected signal

Carry out the interpolation acquisition

N=1 ..., N _Sc, N _ScFor the sub-carrier number of frequency domain calibration, described coupled signal processor is to described

Carry out the FFT conversion and obtain the frequency domain response corrected signal

By the coupling channel time-domain response According to the calibration band width, carrying out interpolation obtains

N=1 ..., N _Sc, transform to frequency domain and obtain the coupling channel frequency domain response

N=1 ..., N _Sc, N _ScFor the sub-carrier number of frequency domain calibration,

Described coupled signal processor is according to described coupling channel frequency domain response

Estimated value to frequency-region signal ${\hat{H}}_{k_a}^r\left(k\right)$ Revise, ${\tilde{H}}_{k_a}^r\left(k\right)={\hat{H}}_{k_a}^r\left(k\right){\left(H_{k_a,\mathrm{CP}}^t\left(k\right)\right)}^H/{\left(\right|\left|H_{k_a,\mathrm{CP}}^t\left(k\right)\right|\left|\right)}^2,$ Obtain the frequency domain response corrected signal ${\hat{H}}_{k_a}^r\left(k\right).$

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