CN102413077B - Method and device for adjusting amplitude of signal transmitted by antenna - Google Patents

Abstract

The embodiment of the invention discloses a method and a device for adjusting amplitude of a signal transmitted by an antenna, which relate to the wireless communication technical field, and is used for providing a signal amplitude adjusting scheme of the antenna transmission direction, which is different from the prior art. The method comprises the following steps that: each antenna channel is respectively estimated according to a received antenna correction sequence to obtain a channel estimation peak value of each antenna channel; a channel estimation benchmark value is determined according to the obtained channel estimation peak value; a signal amplitude compensation coefficient of each antenna channel is respectively determined according to the channel estimation benchmark value and the channel estimation peak value of each antenna channel, and the amplitude of a signal transmitted by a corresponding antenna channel to the antenna is adjusted according to the determined signal amplitude compensation coefficient. Therefore, the method disclosed by the embodiment of the invention is different from the signal amplitude adjusting scheme of the antenna transmission direction of the prior art.

Description

A kind of antenna transmitted signal amplitude adjustment method and device

Technical field

The present invention relates to wireless communication technology field, relate in particular to a kind of antenna transmitted signal amplitude adjustment method and device.

Background technology

Be applied to TD SDMA (the Time Division-SynchronousCode Division Multiple Access of 3G (Third Generation) Moblie, TD-SCDMA) smart antenna of system is one of conventional antenna type, in the transmitting-receiving process of signal, require amplitude and the phase place of signal transmission on each passage that smart antenna is corresponding to be consistent, therefore, need to calibrate smart antenna.

Between base station main website equipment and remote radio unit (RRU) (Radio Remote Unit, RRU), after Ir nuclear interface standardizing, antenna calibration carries out in RRU.In RRU because the impact of temperature is by the variation causing on link gain; Because the stability of clock will cause data pick-up point position after high-speed sampling not at root mean square pulse-shaping filtering energy point of maximum intensity; RRU will carry out adjustment and digital down converter (the Data Down Change of programmable gain amplifier device (PGC) after variations in temperature, automatic gain controller (Automatic Gain Contronl, AGC) for this reason, DDC)/digital up converter (Data Up Change, DUC) synchronous adjustment, all can trigger antenna calibration one time after each adjustment; Because the small loosening link gain difference that also will cause of plug wire joint in the long-play of base station becomes large, these all require the irregular or regular antenna calibration that carries out simultaneously.As shown in Figure 1, existing antenna calibration method is as follows:

The digital signal processing module of RRU to passage 0 to passage 7 send one group of mutually orthogonal transmitting antenna calibrating sequence (passage 0 to passage 7 respectively corresponding passage label be ant0, ant1 ..., ant7), transmitting antenna calibrating sequence is herein basic calibrating sequence x _bcyclic shift, different displacement institute calling sequences meet orthogonality relation.This group transmitting antenna calibrating sequence in each passage respectively the analog signal through analog intermediate frequency module turn upconversion process, the gain control processing of PGC_rx module and the power amplification processing of power amplifier module of digital signal and digital signal samples processing, up-converter module.

After the processing of this group transmitting antenna calibrating sequence by modules in passage, obtain reception antenna calibrating sequence, this reception antenna calibrating sequence is:

$y=h\⊗x+n$

This group reception antenna calibrating sequence sends to CPU processor to carry out width through digital signal processing module again and compensates mutually calculating after coupling disc is coupled to calibrated channel (calibrated channel is comprised of a passage 0 in coupling (ca1) mouth and eight passages of coupling disc, and this sentences passage 0 for example).

X=[x in this group reception antenna calibrating sequence ₀, x ₁..., x ₇] ^tthe transmitting antenna calibrating sequence that representative digit processing module sends; H=[h ₀, h ₁..., h ₇] ^trepresent the channel impulse response of passage sending direction; N is the noise signal that passage 0 receives; Y is the reception antenna calibrating sequence that CPU processor receives.When signal to noise ratio is larger, noise n can ignore, and each channel bank is estimated to be expressed as follows:

$h^{\′}=\mathrm{ifft}\left(\frac{\mathrm{fft}\left(y\right)}{\mathrm{fft}\left(x_B\right)}\right)$

Wherein fft is fast Fourier transform, and ifft is inverse fast Fourier transform, h '=[h ₀, h ₁..., h ₇]; Get the minimum value in h ', be assumed to h _min, the passage width phase penalty coefficient that CPU processor calculates is as follows:

$c_i=\frac{\left|h_{\min }\right|}{h_i}$ i＝0，1，…，7

Wherein c _ifor the width phase penalty coefficient of i passage obtaining, the channel impulse response that h ' is i passage.

CPU processor sends to digital signal processing module by the passage width phase penalty coefficient obtaining, and digital signal processing module, according to the passage width phase penalty coefficient obtaining, carries out respectively the compensation of corresponding amplitude and phase place to each passage.Inventor's discovery, the channel compensation coefficient that the method obtains is less than or equal to 1, that is to say and after the compensation of width phase penalty coefficient, will make the gross output of passage reduce, and the magnitude of reduction depends on h _minand the difference size between other channel bank estimation, its consequence is the reduction of gross output, and reduces because the reduction of gross output makes cell coverage area.

Summary of the invention

The embodiment of the present invention provides a kind of antenna transmitted signal amplitude adjustment method and device, for the signal amplitude that the antenna sending direction that is different from prior art is provided, adjusts scheme.

A kind of antenna transmitted signal amplitude adjustment method, the method comprises:

According to the antenna calibration sequence receiving, each antenna channels is carried out respectively to channel estimating, obtain the channel estimating peak value of each antenna channels;

According to the channel estimating peak value obtaining, determine channel estimating fiducial value;

According to the channel estimating peak value of channel estimating fiducial value and each antenna channels, determine respectively the signal amplitude penalty coefficient of each antenna channels, and utilize definite signal amplitude penalty coefficient adjustment respective antenna passage to send to the amplitude of the signal of antenna;

A kind of antenna transmitted signal amplitude adjustment means, this device comprises:

Channel estimation module, for according to the antenna calibration sequence receiving, each antenna channels being carried out respectively to channel estimating, obtains the channel estimating peak value of each antenna channels;

Channel estimating base modules, for determining channel estimating fiducial value according to the channel estimating peak value obtaining;

Coefficient determination module, for according to the channel estimating peak value of channel estimating fiducial value and each antenna channels, determines respectively the signal amplitude penalty coefficient of each antenna channels;

Adjusting module, for utilizing definite signal amplitude penalty coefficient adjustment respective antenna passage to send to the amplitude of the signal of antenna;

A kind of remote RF unit equipment, this equipment comprises the arbitrary device in said apparatus.

The channel estimating peak value that the method that the embodiment of the present invention provides calculates by basis and channel estimating fiducial value, determine the signal amplitude penalty coefficient of this antenna channels, and utilize this signal amplitude penalty coefficient to adjust this antenna channels to send to the amplitude of the signal of antenna, the method that therefore embodiment of the present invention provides is that the signal amplitude that is different from the antenna sending direction of prior art is adjusted scheme.

Accompanying drawing explanation

Fig. 1 is antenna sending direction antenna calibration signal flow diagram in prior art;

The antenna transmitted signal amplitude adjustment method schematic diagram that Fig. 2 provides for the embodiment of the present invention;

The antenna sending direction antenna calibration signal flow diagram that Fig. 3 provides for the embodiment of the present invention;

The antenna transmitted signal amplitude adjustment means schematic diagram that Fig. 4 provides for the embodiment of the present invention.

Embodiment

The embodiment of the present invention provides a kind of antenna transmitted signal amplitude adjustment method and device, the method is by carrying out respectively channel estimating to each antenna channels, obtain the channel estimating peak value of each antenna channels and determine channel estimating fiducial value according to the mean value of channel estimating peak value, recycling channel estimating peak value and channel estimating fiducial value, determine the signal amplitude penalty coefficient of this antenna channels, and according to this signal amplitude penalty coefficient, adjust antenna channels and send to the amplitude of the signal of antenna, can be in the difference of the sending direction fine compensation interchannel signal amplitude of antenna, after reaching compensation, can not make gross output reduce, do not affect the object of cell coverage area.As shown in Figure 2, the method comprises the following steps:

Step 11, carries out respectively channel estimating according to the antenna calibration sequence receiving to each antenna channels, obtains the channel estimating peak value of each antenna channels;

Step 12, determines channel estimating fiducial value according to the channel estimating peak value obtaining;

Step 13, according to the channel estimating peak value of channel estimating fiducial value and each antenna channels, determine respectively the signal amplitude penalty coefficient of each antenna channels, and utilize definite signal amplitude penalty coefficient adjustment respective antenna passage to send to the amplitude of the signal of antenna.

Step 12 can have multiple implementation, and preferably two kinds of specific implementations are:

Determine that channel estimating fiducial value is the mean value of the channel estimating peak value of each antenna channels; Or

Determine the effective passage in each antenna channels, and definite channel estimating fiducial value is the effective mean value of the channel estimating peak value of passage wherein;

Wherein, in the second implementation, need to determine the effective passage in each antenna channels, specifically for each antenna channels: judgement receives power difference between antenna channels input signal and the output signal of coupling disc that coupling disc the last time receives before described antenna calibration sequence whether in the first setting power difference range, and whether the power difference between the first peak value and the second peak value in the channel estimation window that antenna channels is carried out obtaining after channel estimating is in the second setting power difference range, in judgement, be while being, determine that antenna channels is effective passage,

What need to further illustrate is, in specific implementation, those skilled in the art can adjusting two difference range according to concrete applied environment flexibly, data that can reference are: the first setting power difference range can be 25 ± 5dB, and the second setting power difference range can be more than 6dB.

Channel estimating fiducial value P _basegenerally according to following formula, determine:

$P_{\mathrm{base}}=\frac{1}{K}\underset{k=i}{\overset{i+K-1}{\mathrm{\Σ}}}{P}_{\mathrm{peak}}^k;---\left(1\right)$

In a kind of embodiment of step 13, can determine according to following formula the signal amplitude penalty coefficient Δ (i) of each antenna channels:

$\mathrm{\Δ}\left(i\right)=20\×\lg \left(\frac{P_{\mathrm{peak}}^i}{P_{\mathrm{base}}}\right);---\left(2\right)$

Wherein in formula (1)

be the range value of the channel estimating peak value of k antenna channels, i be choose for determining the numbering of antenna channels of channel estimating fiducial value, K be choose for determining the number of antenna channels of channel estimating fiducial value; In formula (2) it is the range value of the channel estimating peak value of i antenna channels; I be choose for determining the numbering of antenna channels of channel estimating fiducial value;

In another kind of embodiment in step 13, also can determine according to following formula the signal amplitude penalty coefficient Δ (i) of each antenna channels:

$\mathrm{\Δ}\left(i\right)=10\×\lg \left(\frac{P_{\mathrm{peak}}^i}{P_{\mathrm{base}}}\right);---\left(3\right)$

As when pressing formula (3) and calculating signal amplitude penalty coefficient, in formula (1)

be the performance number of the channel estimating peak value of k antenna channels, i be choose for determining the numbering of antenna channels of channel estimating fiducial value, K be choose for determining the number of antenna channels of channel estimating fiducial value; In formula (2)

it is the performance number of the channel estimating peak value of i antenna channels; I be choose for determining the numbering of antenna channels of channel estimating fiducial value

The method of utilizing this signal amplitude penalty coefficient to adjust the amplitude of the signal of this antenna channels transmission in step 13 comprises following three kinds; The first: the integer part numerical value of this Amplitude Compensation coefficient is sent to the PGC module in this antenna channels, the fractional part numerical value of this Amplitude Compensation coefficient is sent to the AGC module in digital signal processing module; Described AGC utilizes the fractional part numerical value of described Amplitude Compensation coefficient, to need to this antenna channels sending to the amplitude of the signal of antenna to adjust; Described PGC utilizes the integer part numerical value of described Amplitude Compensation coefficient, and the amplitude of the signal that need to send to antenna is adjusted; The second, sends to the AGC module in digital signal processing module by this Amplitude Compensation coefficient; The Amplitude Compensation coefficient that the utilization of AGC module receives, to need to this antenna channels sending to the amplitude of the signal of antenna to adjust; The third, send to the PGC module in this antenna channels by this Amplitude Compensation coefficient; The Amplitude Compensation coefficient that the utilization of PGC module receives, adjusts the amplitude of the signal that need to send to antenna.

With specific embodiment, introduce in detail below:

Embodiment mono-:

The embodiment of the present invention one provide a kind of by AGC module and PGC module to antenna transmitted signal amplitude adjustment method, the method comprises the following steps:

Step 1, smart antenna in the course of the work, triggers PGC and adjusts after RRU carries out the temperature-compensating after variations in temperature, and the synchronous adjustment of DDC/DUC; After adjusting, trigger antenna calibration work and forward step 2 to;

The PGC being triggered by temperature-compensating in this step adjusts and only in the initialization of calibration of base station, carries out;

Step 2, when carrying out antenna calibration work, first RRU carries out AC (ANTENNACALIBRATION, AC) antenna calibration to the phase place of each passage is compensated; This step is same as the prior art to be repeated no more here;

Step 3, as shown in Figure 3, the digital signal processing module of RRU sends one group of mutually orthogonal transmitting antenna calibrating sequence to passage 0 to passage 7, and this group transmitting antenna calibrating sequence is:

x＝[x ₀，x ₁，…，x ₇] ^T

Passage 0 to passage 7 respectively corresponding passage label be ant0, ant1 ..., ant7, transmitting antenna calibrating sequence is herein basic calibrating sequence x _bcyclic shift, different displacement institute calling sequences meet orthogonality relation;

Step 4, upconversion process, the gain control processing of PGC_rx module and the power amplification of power amplifier module that this group transmitting antenna calibrating sequence turns processing, the up-converter module of digital signal and digital signal samples through the analog signal of the analog intermediate frequency module in each passage in Fig. 3 obtains following reception antenna calibrating sequence after processing:

$y=h\⊗x+n$

Wherein x=[x ₀, x ₁..., x ₇] ^tthe transmitting antenna calibrating sequence that representative digit processing module sends; H=[h ₀, h ₁, h ₇] ^trepresent the channel impulse response of passage sending direction; N is the noise that passage 0 receives, and when signal to noise ratio is larger, noise n can ignore;

Step 5, after coupling disc is coupled to calibrated channel (calibrated channel is comprised of a passage 0 in (ca1) mouth and eight passages of coupling disc, and this sentences passage 0 for example), sending to CPU processor to carry out signal amplitude compensation again through digital signal processing module the reception antenna calibrating sequence y of acquisition calculates;

Step 6, CPU carries out respectively channel estimating according to the reception antenna calibrating sequence receiving to each antenna channels, and by following formula, obtains the channel estimating peak value of each antenna channels;

$h^{\′}=\mathrm{ifft}\left(\frac{\mathrm{fft}\left(y\right)}{\mathrm{fft}\left(x_B\right)}\right)$ h′＝[h ₀，h ₁，…，h ₇]

Step 7, for each antenna channels, determines the effective passage in each antenna channels, and concrete grammar as previously mentioned, repeats no more here;

Step 8, determines that channel estimating fiducial value is the mean value of the channel estimating peak value of each antenna channels; Or after effective passage of determining in each antenna channels, determine that channel estimating fiducial value is the effective mean value of the channel estimating peak value of passage wherein; About channel estimating fiducial value, can calculate by above-mentioned formula (1), repeat no more here;

Step 9, according to the channel estimating peak value of channel estimating fiducial value and each antenna channels, determines respectively the signal amplitude penalty coefficient of each antenna channels; Signal amplitude penalty coefficient about antenna channels can calculate by above-mentioned formula (2), repeats no more here;

Step 10, as shown in Figure 3, CPU is by the fractional part numerical value of the signal amplitude penalty coefficient Δ (i) of i the passage calculating, send to the AGC module in digital signal processing module, make AGC utilize the fractional part numerical value of this definite signal amplitude penalty coefficient to need to this antenna channels sending to the amplitude of the signal of antenna to adjust, if described adjustment does not exceed self adjusting range, AGC module is adjusted this antenna channels and sends to the amplitude of the signal of antenna; Otherwise, do not adjust;

CPU sends to the PGC module in PGC_rx module by the integer part numerical value of the signal amplitude penalty coefficient Δ (i) of i the passage calculating simultaneously, make PGC module utilize the integer part numerical value of this definite signal amplitude penalty coefficient, amplitude to the signal that need to send to antenna is adjusted, if this adjustment does not exceed self adjusting range, PGC module is adjusted this antenna channels and sends to the amplitude of the signal of antenna; Otherwise, do not adjust;

Step 11 again triggers AC antenna calibration after above-mentioned amplitude difference adjustment, to compensate because the adjustment of PGC causes the difference in each channel phases.

What wherein in step 9, relate to also can calculate according to above-mentioned formula (3) about signal amplitude penalty coefficient, repeats no more here;

Especially, in the step 8 in the present embodiment one, according to the channel estimating peak value obtaining, determine the method for channel estimating fiducial value, can have multiple implementation, and the present embodiment has only provided two kinds of preferably specific implementations.

Embodiment bis-:

The embodiment of the present invention two provides a kind of method of antenna transmitted signal amplitude being adjusted by AGC module, and the method comprises the following steps:

Step (1), smart antenna triggers in the course of the work PGC and adjusts after RRU carries out the temperature-compensating after variations in temperature, and the synchronous adjustment of DDC/DUC; After adjusting, trigger antenna calibration work and forward step (2) to;

The PGC being triggered by temperature-compensating in this step adjusts and only in the initialization of calibration of base station, carries out;

Step (2), when carrying out antenna calibration work, first RRU carries out AC antenna calibration to the phase place of each passage is compensated; This step is same as the prior art to be repeated no more here;

Step (3), as shown in Figure 3, the digital signal processing module of RRU sends one group of mutually orthogonal transmitting antenna calibrating sequence to passage 0 to passage 7, and this group transmitting antenna calibrating sequence is:

x＝[x ₀，x ₁，…，x ₇] ^T

Passage 0 to passage 7 respectively corresponding passage label be ant0, ant1 ..., ant7, transmitting antenna calibrating sequence is herein basic calibrating sequence x _bcyclic shift, different displacement institute calling sequences meet orthogonality relation;

Step (4), upconversion process, the gain control processing of PGC_rx module and the power amplification of power amplifier module that this group transmitting antenna calibrating sequence turns processing, the up-converter module of digital signal and digital signal samples through the analog signal of the analog intermediate frequency module in each passage in Fig. 3 obtains following reception antenna calibrating sequence after processing:

$y=h\⊗x+n$

Wherein x=[x ₀, x ₁..., x ₇] ^tthe transmitting antenna calibrating sequence that representative digit processing module sends; H=[h ₀, h ₁..., h ₇] ^trepresent the channel impulse response of passage sending direction; N is the noise that passage 0 receives, and when signal to noise ratio is larger, noise n can ignore;

Step (5), after coupling disc is coupled to calibrated channel (calibrated channel is comprised of a passage 0 in (ca1) mouth and eight passages of coupling disc, and this sentences passage 0 for example), sending to CPU processor to carry out signal amplitude compensation again through digital signal processing module the reception antenna calibrating sequence y of acquisition calculates;

Step (6), CPU carries out respectively channel estimating according to the reception antenna calibrating sequence receiving to each antenna channels, and by following formula, obtains the channel estimating peak value of each antenna channels;

$h^{\′}=\mathrm{ifft}\left(\frac{\mathrm{fft}\left(y\right)}{\mathrm{fft}\left(x_B\right)}\right)$ h′＝[h ₀，h ₁，…，h ₇]

Step (7), for each antenna channels, determines the effective passage in each antenna channels, and concrete grammar as previously mentioned, repeats no more here;

Step (8), determines that channel estimating fiducial value is the mean value of the channel estimating peak value of each antenna channels; Or after effective passage of determining in each antenna channels, determine that channel estimating fiducial value is the effective mean value of the channel estimating peak value of passage wherein; About channel estimating fiducial value, can use above-mentioned formula (1) to calculate, repeat no more here;

Step (9), according to the channel estimating peak value of channel estimating fiducial value and each antenna channels, determines respectively the signal amplitude penalty coefficient of each antenna channels; About the signal amplitude penalty coefficient of antenna channels, can use above-mentioned formula (2) to calculate, repeat no more here;

Step (10), CPU sends to the signal amplitude penalty coefficient Δ (i) of i the passage calculating the AGC module of digital signal processing module, make AGC utilize this definite signal amplitude penalty coefficient to need to this antenna channels sending to the amplitude of the signal of antenna to adjust, if described adjustment does not exceed self adjusting range, AGC module is adjusted this antenna channels and sends to the amplitude of the signal of antenna; Otherwise, do not adjust;

Step (11) again triggers AC antenna calibration after above-mentioned amplitude difference adjustment, to compensate because the adjustment of AGC causes the difference in each channel phases.

What wherein in step (9), relate to is also available so that calculate with above-mentioned formula (3) about signal amplitude penalty coefficient, repeats no more here;

Especially, in step (8) in the present embodiment, according to the channel estimating peak value obtaining, determine the method for channel estimating fiducial value, can have multiple implementation, and the present embodiment has only provided two kinds of preferably specific implementations.

Embodiment tri-:

The embodiment of the present invention three provides a kind of method of antenna transmitted signal amplitude being adjusted by PGC module, and the method comprises the following steps:

Step <1>, smart antenna triggers in the course of the work PGC and adjusts after RRU carries out the temperature-compensating after variations in temperature, and the synchronous adjustment of DDC/DUC; After adjusting, trigger antenna calibration work and forward step <2> to;

The PGC being triggered by temperature-compensating in this step adjusts and only in the initialization of calibration of base station, carries out;

Step <2>, when carrying out antenna calibration work, first RRU carries out AC antenna calibration to the phase place of each passage is compensated; This step is same as the prior art to be repeated no more here;

Step <3>, as shown in Figure 3, the digital signal processing module of RRU sends one group of mutually orthogonal transmitting antenna calibrating sequence to passage 0 to passage 7, and this group transmitting antenna calibrating sequence is:

x＝[x ₀，x ₁，…，x ₇] ^T

Passage 0 to passage 7 respectively corresponding passage label be ant0, ant1 ..., ant7, transmitting antenna calibrating sequence is herein basic calibrating sequence x _bcyclic shift, different displacement institute calling sequences meet orthogonality relation;

Step <4>, upconversion process, the gain control processing of PGC_rx module and the power amplification of power amplifier module that this group transmitting antenna calibrating sequence turns processing, the up-converter module of digital signal and digital signal samples through the analog signal of the analog intermediate frequency module in each passage in Fig. 3 obtains following reception antenna calibrating sequence after processing:

$y=h\&CircleTimes;x+n$

Wherein x=[x ₀, x ₁..., x ₇] ^tthe transmitting antenna calibrating sequence that representative digit processing module sends; H=[h ₀, h ₁..., h ₇] ^trepresent the channel impulse response of passage sending direction; N is the noise that passage 0 receives, and when signal to noise ratio is larger, noise n can ignore;

Step <5>, after coupling disc is coupled to calibrated channel (calibrated channel is comprised of a passage 0 in (ca1) mouth and eight passages of coupling disc, and this sentences passage 0 for example), sending to CPU processor to carry out signal amplitude compensation again through digital signal processing module the reception antenna calibrating sequence y of acquisition calculates.

Step <6>, CPU carries out respectively channel estimating according to the reception antenna calibrating sequence receiving to each antenna channels, and by following formula, obtains the channel estimating peak value of each antenna channels;

$h^{\&prime;}=\mathrm{ifft}\left(\frac{\mathrm{fft}\left(y\right)}{\mathrm{fft}\left(x_B\right)}\right)$ h′＝[h ₀，h ₁，…，h ₇]

Step <7>, for each antenna channels, determines the effective passage in each antenna channels, and concrete grammar as previously mentioned, repeats no more here;

Step <8>, determines that channel estimating fiducial value is the mean value of the channel estimating peak value of each antenna channels; Or after effective passage of determining in each antenna channels, determine that channel estimating fiducial value is the effective mean value of the channel estimating peak value of passage wherein; About channel estimating fiducial value, can use above-mentioned formula (1) to calculate, repeat no more here;

Step <9>, according to the channel estimating peak value of channel estimating fiducial value and each antenna channels, determines respectively the signal amplitude penalty coefficient of each antenna channels; About the signal amplitude penalty coefficient of antenna channels, can use above-mentioned formula (2) to calculate, repeat no more here;

Step <10>, CPU sends to the signal amplitude penalty coefficient Δ (i) of i the passage calculating the PGC module of digital signal processing module, make PGC utilize this definite signal amplitude penalty coefficient to need to this antenna channels sending to the amplitude of the signal of antenna to adjust, if described adjustment does not exceed self adjusting range, PGC module is adjusted this antenna channels and sends to the amplitude of the signal of antenna; Otherwise, do not adjust;

Step <11> again triggers AC antenna calibration after above-mentioned amplitude difference adjustment, to compensate because the adjustment of PGC causes the difference in each channel phases.

What wherein in step <9>, relate to is also available so that calculate with above-mentioned formula (3) about signal amplitude penalty coefficient, repeats no more here;

Especially, in step <8> in the present embodiment, according to the channel estimating peak value obtaining, determine the method for channel estimating fiducial value, can have multiple implementation, and the present embodiment two kinds of preferably specific implementations have only been provided.

As shown in Figure 4, this device of signal amplitude adjusting device that the embodiment of the present invention provides a kind of antenna to send comprises:

Channel estimation module 41, for according to the antenna calibration sequence receiving, each antenna channels being carried out respectively to channel estimating, obtains the channel estimating peak value of each antenna channels;

Channel estimating base modules 42, for determining channel estimating fiducial value according to the channel estimating peak value obtaining;

Coefficient determination module 43, for according to the channel estimating peak value of channel estimating fiducial value and each antenna channels, determines respectively the signal amplitude penalty coefficient of each antenna channels;

Adjusting module 45, for utilizing definite signal amplitude penalty coefficient adjustment respective antenna passage to send to the amplitude of the signal of antenna;

Described device also comprises:

Judge module 44, for determining effective passage of each antenna channels;

Described channel estimating base modules 42, for determining the mean value of the channel estimating peak value that channel estimating fiducial value is each antenna channels; Or the effective passage in each antenna channels of determining according to described judge module, and definite channel estimating fiducial value is the effective mean value of the channel estimating peak value of passage wherein;

Described judge module 44 for:

For each antenna channels: judgement receives power difference between antenna channels input signal and the output signal of coupling disc that coupling disc the last time receives before described antenna calibration sequence whether in the first setting power difference range, and whether the power difference between the first peak value and the second peak value in the channel estimation window that antenna channels is carried out obtaining after channel estimating is in the second setting power difference range, in judgement, be while being, determine that antenna channels is effective passage;

Described channel estimating base modules 42 for:

According to following formula, determine channel estimating fiducial value P _base:

$P_{\mathrm{base}}=\frac{1}{K}\underset{k=i}{\overset{i+K-1}{\mathrm{\&Sigma;}}}{P}_{\mathrm{peak}}^k;$

Described coefficient determination module 43 for:

According to following formula, determine the signal amplitude penalty coefficient Δ (i) of each antenna channels:

$\mathrm{\&Delta;}\left(i\right)=20\&times;\lg \left(\frac{P_{\mathrm{peak}}^i}{P_{\mathrm{base}}}\right)$

Wherein,

be the range value of the channel estimating peak value of k antenna channels, i be choose for determining the numbering of antenna channels of channel estimating fiducial value, K be choose for determining the number of antenna channels of channel estimating fiducial value; it is the range value of the channel estimating peak value of i antenna channels;

Described channel estimating base modules 42 for:

According to following formula, determine channel estimating fiducial value P _base:

$P_{\mathrm{base}}=\frac{1}{K}\underset{k=i}{\overset{i+K-1}{\mathrm{\&Sigma;}}}{P}_{\mathrm{peak}}^k;$

Described coefficient determination module 43 for:

According to following formula, determine the signal amplitude penalty coefficient Δ (i) of each antenna channels:

$\mathrm{\&Delta;}\left(i\right)=10\&times;\lg \left(\frac{P_{\mathrm{peak}}^i}{P_{\mathrm{base}}}\right);$

Wherein, be the performance number of the channel estimating peak value of k antenna channels, i be choose for determining the numbering of antenna channels of channel estimating fiducial value, K be choose for determining the number of antenna channels of channel estimating fiducial value;

it is the performance number of the channel estimating peak value of i antenna channels;

Described adjusting module 45 comprises programmable gain amplifier PGC module 46 and automatic gain control AGC module 47;

Described AGC module 47, for utilizing the fractional part numerical value of the described Amplitude Compensation coefficient receiving, to need to this antenna channels sending to the amplitude of the signal of antenna to adjust;

Described PGC module 46, for utilizing the integer part numerical value of the described Amplitude Compensation coefficient receiving, adjusts the amplitude of the signal that need to send to antenna;

Described coefficient determination module 43 also for:

The integer part numerical value of described signal amplitude penalty coefficient is sent to described PGC module 46, the fractional part numerical value of this Amplitude Compensation coefficient is sent to described AGC module 47;

Described adjusting module 45 is AGC module 47, this AGC module 47 for:

The Amplitude Compensation coefficient that utilization receives, to need to this antenna channels sending to the amplitude of the signal of antenna to adjust;

Described coefficient determination module 43 also for:

Described signal amplitude penalty coefficient is sent to described AGC module 47;

Described adjusting module 45 is PGC module 46, this PGC module 46 for:

The Amplitude Compensation coefficient that utilization receives, adjusts the amplitude of the signal that need to send to antenna;

Described coefficient determination module 43 also for:

Described signal amplitude penalty coefficient is sent to described PGC module 46;

The embodiment of the present invention provides a kind of RRU equipment, and this equipment comprises the arbitrary device in said apparatus.

In sum, the beneficial effect of the embodiment of the present invention is as follows:

According to the channel estimating peak value calculating and channel estimating fiducial value, determine the signal amplitude penalty coefficient of this antenna channels, and utilize this signal amplitude penalty coefficient to adjust this antenna channels to send to the amplitude of the signal of antenna, therefore the embodiment of the present invention can provide a kind of signal amplitude of the antenna sending direction that is different from prior art to adjust scheme; Simultaneously by calculate obtain Amplitude Compensation coefficient (

or ) integer part and fractional part compensate respectively, can reach the amplitude of each passage is carried out to fine compensation, the gross output that guarantees each passage is substantially constant, the coverage of aerial signal does not have any variation, guarantees can not affect after compensation after user's figuration gain not being lost, compensated after broadcast figuration shape, compensation to reduce the difficulty of community coverage optimization.

Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) that wherein include computer usable program code.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.

Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the modification of the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (13)

1. an antenna transmitted signal amplitude adjustment method, is characterized in that, the method comprises:

According to the antenna calibration sequence receiving, each antenna channels is carried out respectively to channel estimating, obtain the channel estimating peak value of each antenna channels;

Determine the effective passage in each antenna channels, and definite channel estimating fiducial value is the effective mean value of the channel estimating peak value of passage wherein; Wherein, described effective passage of determining in each antenna channels, specifically comprise: for each antenna channels: judgement receives power difference between antenna channels input signal and the output signal of coupling disc that coupling disc the last time receives before described antenna calibration sequence whether in the first setting power difference range, and whether the power difference between the first peak value and the second peak value in the channel estimation window that antenna channels is carried out obtaining after channel estimating is in the second setting power difference range, in judgement, be while being, determine that antenna channels is effective passage;

According to the channel estimating peak value of channel estimating fiducial value and each antenna channels, determine respectively the signal amplitude penalty coefficient of each antenna channels, and utilize definite signal amplitude penalty coefficient adjustment respective antenna passage to send to the amplitude of the signal of antenna.

2. antenna transmitted signal amplitude adjustment method as claimed in claim 1, is characterized in that, according to following formula, determines channel estimating fiducial value P _base:

$P_{\mathrm{base}}=\frac{1}{K}\underset{k=i}{\overset{i+K-1}{\mathrm{\&Sigma;}}}{P}_{\mathrm{peak}}^k;$

According to following formula, determine the signal amplitude penalty coefficient Δ (i) of each antenna channels:

$\mathrm{\&Delta;}\left(i\right)=20\&times;\lg \left(\frac{P_{\mathrm{peak}}^i}{P_{\mathrm{base}}}\right);$

Wherein,

be the range value of the channel estimating peak value of k antenna channels, i be choose for determining the numbering of antenna channels of channel estimating fiducial value, K be choose for determining the number of antenna channels of channel estimating fiducial value;

it is the range value of the channel estimating peak value of i antenna channels.

3. the signal amplitude adjusting method that antenna sends as claimed in claim 1, is characterized in that, according to following formula, determines channel estimating fiducial value P _base:

$P_{\mathrm{base}}=\frac{1}{K}\underset{k=i}{\overset{i+K-1}{\mathrm{\&Sigma;}}}{P}_{\mathrm{peak}}^k;$

According to following formula, determine the signal amplitude penalty coefficient Δ (i) of each antenna channels:

$\mathrm{\&Delta;}\left(i\right)=10\&times;\lg \left(\frac{P_{\mathrm{peak}}^i}{P_{\mathrm{base}}}\right);$

Wherein,

be the performance number of the channel estimating peak value of k antenna channels, i be choose for determining the numbering of antenna channels of channel estimating fiducial value, K be choose for determining the number of antenna channels of channel estimating fiducial value; it is the performance number of the channel estimating peak value of i antenna channels.

4. as antenna transmitted signal amplitude adjustment method as described in arbitrary in claim 1-3, it is characterized in that, the described amplitude of utilizing this signal amplitude penalty coefficient to adjust the signal that this antenna channels sends comprises:

The integer part numerical value of this Amplitude Compensation coefficient is sent to the programmable gain amplifier PGC module in this antenna channels, the fractional part numerical value of this Amplitude Compensation coefficient is sent to the automatic gain control AGC module in digital signal processing module;

Described AGC utilizes the fractional part numerical value of described Amplitude Compensation coefficient, to need to this antenna channels sending to the amplitude of the signal of antenna to adjust;

Described PGC utilizes the integer part numerical value of described Amplitude Compensation coefficient, and the amplitude of the signal that need to send to antenna is adjusted.

5. as antenna transmitted signal amplitude adjustment method as described in arbitrary in claim 1-3, it is characterized in that, the described amplitude of utilizing this signal amplitude penalty coefficient to adjust the signal that this antenna channels sends comprises:

This Amplitude Compensation coefficient is sent to the AGC module in digital signal processing module;

The Amplitude Compensation coefficient that the utilization of AGC module receives, to need to this antenna channels sending to the amplitude of the signal of antenna to adjust.

6. as antenna transmitted signal amplitude adjustment method as described in arbitrary in claim 1-3, it is characterized in that, the described amplitude of utilizing this signal amplitude penalty coefficient to adjust the signal that this antenna channels sends comprises:

This Amplitude Compensation coefficient is sent to the PGC module in this antenna channels;

The Amplitude Compensation coefficient that the utilization of PGC module receives, adjusts the amplitude of the signal that need to send to antenna.

7. an antenna transmitted signal amplitude adjustment means, is characterized in that, this device comprises:

Channel estimation module, for according to the antenna calibration sequence receiving, each antenna channels being carried out respectively to channel estimating, obtains the channel estimating peak value of each antenna channels;

Judge module, for for each antenna channels: judgement receives power difference between antenna channels input signal and the output signal of coupling disc that coupling disc the last time receives before described antenna calibration sequence whether in the first setting power difference range, and whether the power difference between the first peak value and the second peak value in the channel estimation window that antenna channels is carried out obtaining after channel estimating is in the second setting power difference range, in judgement, be while being, determine that antenna channels is that effective passage is determined the effective passage in each antenna channels;

Channel estimating base modules, for effective passage of each antenna channels of determining according to described judge module, and definite channel estimating fiducial value is the effective mean value of the channel estimating peak value of passage wherein;

Coefficient determination module, for according to the channel estimating peak value of channel estimating fiducial value and each antenna channels, determines respectively the signal amplitude penalty coefficient of each antenna channels;

Adjusting module, for utilizing definite signal amplitude penalty coefficient adjustment respective antenna passage to send to the amplitude of the signal of antenna.

8. antenna transmitted signal amplitude adjustment means as claimed in claim 7, is characterized in that, described channel estimating base modules is used for:

According to following formula, determine channel estimating fiducial value P _base:

$P_{\mathrm{base}}=\frac{1}{K}\underset{k=i}{\overset{i+K-1}{\mathrm{\&Sigma;}}}{P}_{\mathrm{peak}}^k;$

Described coefficient determination module is used for:

According to following formula, determine the signal amplitude penalty coefficient Δ (i) of each antenna channels:

$\mathrm{\&Delta;}\left(i\right)=20\&times;\lg \left(\frac{P_{\mathrm{peak}}^i}{P_{\mathrm{base}}}\right)$

Wherein,

be the range value of the channel estimating peak value of k antenna channels, i be choose for determining the numbering of antenna channels of channel estimating fiducial value, K be choose for determining the number of antenna channels of channel estimating fiducial value;

it is the range value of the channel estimating peak value of i antenna channels.

9. antenna transmitted signal amplitude adjustment means as claimed in claim 7, is characterized in that, described channel estimating base modules is used for:

According to following formula, determine channel estimating fiducial value P _base:

$P_{\mathrm{base}}=\frac{1}{K}\underset{k=i}{\overset{i+K-1}{\mathrm{\&Sigma;}}}{P}_{\mathrm{peak}}^k;$

Described coefficient determination module is used for:

According to following formula, determine the signal amplitude penalty coefficient Δ (i) of each antenna channels:

$\mathrm{\&Delta;}\left(i\right)=10\&times;\lg \left(\frac{P_{\mathrm{peak}}^i}{P_{\mathrm{base}}}\right);$

Wherein,

be the performance number of the channel estimating peak value of k antenna channels, i be choose for determining the numbering of antenna channels of channel estimating fiducial value, K be choose for determining the number of antenna channels of channel estimating fiducial value; it is the performance number of the channel estimating peak value of i antenna channels.

10. as antenna transmitted signal amplitude adjustment means as described in arbitrary in claim 7-9, it is characterized in that, described adjusting module comprises programmable gain amplifier PGC module and automatic gain control AGC module;

Described AGC module, for utilizing the fractional part numerical value of the described Amplitude Compensation coefficient receiving, to need to this antenna channels sending to the amplitude of the signal of antenna to adjust;

Described PGC module, for utilizing the integer part numerical value of the described Amplitude Compensation coefficient receiving, adjusts the amplitude of the signal that need to send to antenna;

Described coefficient determination module also for:

The integer part numerical value of described signal amplitude penalty coefficient is sent to described PGC module, the fractional part numerical value of this Amplitude Compensation coefficient is sent to described AGC module.

11. as antenna transmitted signal amplitude adjustment means as described in arbitrary in claim 7-9, it is characterized in that, described adjusting module is AGC module, and this AGC module is used for:

The Amplitude Compensation coefficient that utilization receives, to need to this antenna channels sending to the amplitude of the signal of antenna to adjust;

Described coefficient determination module also for:

Described signal amplitude penalty coefficient is sent to described AGC module.

12. as antenna transmitted signal amplitude adjustment means as described in arbitrary in claim 7-9, it is characterized in that, described adjusting module is PGC module, and this PGC module is used for:

The Amplitude Compensation coefficient that utilization receives, adjusts the amplitude of the signal that need to send to antenna;

Described coefficient determination module also for:

Described signal amplitude penalty coefficient is sent to described PGC module.

13. 1 kinds of remote RF unit equipments, is characterized in that, this equipment comprises arbitrary described device in claim 7-12.

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