WO2015184632A1 - Procédé et dispositif d'étalonnage conjoint des canaux d'une pluralité d'antennes actives - Google Patents

Procédé et dispositif d'étalonnage conjoint des canaux d'une pluralité d'antennes actives Download PDF

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Publication number
WO2015184632A1
WO2015184632A1 PCT/CN2014/079333 CN2014079333W WO2015184632A1 WO 2015184632 A1 WO2015184632 A1 WO 2015184632A1 CN 2014079333 W CN2014079333 W CN 2014079333W WO 2015184632 A1 WO2015184632 A1 WO 2015184632A1
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WO
WIPO (PCT)
Prior art keywords
corrected
correction
downlink
uplink
correction information
Prior art date
Application number
PCT/CN2014/079333
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English (en)
Chinese (zh)
Inventor
蒋亚军
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201480037007.9A priority Critical patent/CN105379014B/zh
Priority to PCT/CN2014/079333 priority patent/WO2015184632A1/fr
Publication of WO2015184632A1 publication Critical patent/WO2015184632A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a channel joint correction method and apparatus for multiple active antennas. Background technique
  • a plurality of active antennas may constitute one antenna array.
  • the transmission power of the signal and the array gain of the antenna can be increased.
  • the signals from the plurality of active antennas included in the antenna array it is necessary to perform joint correction on the channels of the plurality of active antennas.
  • the process of jointly correcting the channels of multiple active antennas is as follows: As shown in FIG. 1, when the channels of the three active antennas are jointly corrected, the slave antenna 1 can be as shown in FIG. The port and the slave port of the active antenna 2 are connected to the combiner, and the master port and the slave port of the active antenna 3 are respectively connected to the combiner.
  • the correction signal 1 from the corrected channel in the active antenna 1 is sent to the combiner through the slave port of the active antenna 1, and the corrected in the active antenna 2 is passed through the slave port of the active antenna 2.
  • the channel sends a correction signal 2 to the combiner.
  • the combiner combines the correction signal 1 and the correction signal 2, and transmits it to the active antenna 3 through the main port of the active antenna 3.
  • the active antenna 3 compares and analyzes the channel correction signals of the respective active antennas to obtain channel differences of the respective active antennas, and sends the obtained difference to the slave splitter through the slave port of the active antenna 3 to make a joint
  • the router feeds back the difference to each active antenna, so that each active antenna adjusts its own corrected channel to achieve channel joint correction of multiple active antennas.
  • embodiments of the present invention provide a channel joint correction method and apparatus for multiple active antennas.
  • the technical solution is as follows:
  • a channel joint correction device for a plurality of active antennas, the device comprising: channel correction, obtaining correction information corresponding to each active antenna, the active antenna group including the at least two Two adjacent active antennas in the active antenna; correction information corresponding to each of the active antennas;
  • a second correction module configured to respectively correct the corrected channel of each of the active antennas according to the correction information corresponding to each of the active antennas.
  • the first calibration module includes: a source antenna group, using one active antenna in the active antenna group as the first active Antenna, using another active antenna as the second active antenna;
  • a first correcting unit configured to perform channel correction on the corrected uplink channel of the first active antenna and the corrected uplink channel of the second active antenna, to obtain first uplink correction information and second uplink correction information, where
  • the first uplink correction information is uplink correction information corresponding to the first active antenna
  • the second uplink correction information is uplink correction information corresponding to the second active antenna
  • a second correcting unit configured to perform channel correction on the corrected downlink channel of the first active antenna and the corrected downlink channel of the second active antenna, to obtain first downlink correction information and second downlink correction information
  • the first downlink correction information is downlink correction information corresponding to the first active antenna
  • the second downlink correction information is downlink correction information corresponding to the second active antenna.
  • the first correcting unit includes:
  • a first injection subunit configured to inject a first correction injection signal on the first uplink branch to obtain a first correction loopback signal, and inject a second correction injection signal on the second uplink branch to obtain a second correction loopback signal
  • the first uplink branch and the second uplink branch each include a corrected uplink channel of the first active antenna, and the first corrected injection signal and the second corrected injection signal are in phase with each other ;
  • a second injection subunit configured to inject the first correction injection signal on the third uplink branch to obtain a third correction loopback signal, and inject the second correction injection signal on the fourth uplink branch to obtain a fourth Correcting the loopback signal
  • the third uplink branch and the fourth uplink branch each comprise a corrected uplink channel of the second active antenna
  • a third injection subunit configured to inject the second correction injection signal on the fifth uplink branch to obtain a fifth correction loopback signal, where the fifth uplink branch includes the corrected uplink of the first active antenna aisle;
  • a first calculating subunit configured to perform, according to the first corrected loopback signal, the second corrected loopback signal, the third corrected loopback signal, the fourth corrected loopback signal, and the fifth corrected
  • the loopback signal calculates the first uplink correction information and the second uplink correction information.
  • the first calculating sub-unit is specifically configured to:
  • the second correcting unit includes:
  • a fourth injection subunit configured to inject a third correction injection signal on the first downlink branch to obtain a sixth correction loopback signal, and inject the third correction injection signal on the second downlink branch to obtain a seventh correction a loopback signal, the first downlink branch and the second downlink branch each including a corrected downlink channel of the first active antenna;
  • a fifth injection subunit configured to inject a fourth correction injection signal on the third downlink branch to obtain an eighth correction loopback signal, and inject the fourth correction injection signal on the fourth downlink branch to obtain a ninth correction loop a back signal
  • the third downlink branch and the fourth downlink branch each comprise a corrected downlink channel of the second active antenna, and the third corrected injection signal and the fourth corrected injection signal are the same Same size
  • a sixth injection subunit configured to inject the third correction injection signal on the fifth downlink branch to obtain a tenth correction loopback signal, where the fifth downlink branch includes the corrected downlink of the first active antenna aisle;
  • a second calculating subunit configured to reply to the seventh correction loopback signal according to the sixth correction loopback signal And the eighth corrected loopback signal, the ninth corrected loopback signal, and the tenth corrected loopback signal, and the first downlink correction information and the second downlink correction information are calculated.
  • the second calculating sub-unit is specifically configured to:
  • the first possible implementation of the first aspect the second possible implementation of the first aspect, the third possible implementation of the first aspect, the fourth possible aspect of the first aspect
  • the implementation manner or the fifth possible implementation manner of the first aspect in the sixth possible implementation manner of the foregoing first aspect,
  • a first correcting unit configured to perform unified correction on the uplink correction information in the correction information corresponding to each of the active antennas, to obtain uplink correction information corresponding to each of the active antennas;
  • a second correcting unit configured to perform unified correction on the downlink correction information in the correction information corresponding to each of the active antennas, to obtain downlink correction information corresponding to each of the active antennas.
  • the second calibration module includes:
  • a first correcting unit configured to respectively correct the corrected uplink channel of each of the active antennas according to the uplink correction information corresponding to each of the active antennas
  • a second correcting unit configured to respectively correct the corrected downlink channel of each of the active antennas according to the downlink correction information corresponding to each of the active antennas.
  • a channel joint correction method for multiple active antennas comprising:
  • the correcting information of the series connection includes: one active antenna in the active antenna group as the first active antenna, and the other An active antenna as the second active antenna;
  • first uplink correction information is For the uplink correction information corresponding to the first active antenna
  • second uplink correction information is uplink correction information corresponding to the second active antenna
  • first downlink correction information is downlink correction information corresponding to the first active antenna
  • second downlink correction information is downlink correction information corresponding to the second active antenna
  • the corrected uplink channel and the second active source of the first active antenna The channel is corrected by the corrected uplink channel of the antenna, and the first uplink correction information and the second uplink correction information are obtained, including:
  • the first uplink branch includes a corrected uplink channel of the first active antenna, and the first corrected injection signal and the second corrected injection signal are in phase with each other;
  • the three uplink branches and the fourth uplink branch each include a corrected uplink channel of the second active antenna
  • the first correcting loopback signal, the second correcting loopback signal, The third correction loopback signal, the fourth correction loopback signal, and the fifth correction loopback signal, and calculating uplink correction information including:
  • the corrected downlink channel and the second active source of the first active antenna Channel correction is performed on the corrected downlink channel of the antenna, and the first downlink correction information and the second downlink correction information are obtained, including:
  • the downlink branch and the second downlink branch each include a corrected downlink channel of the first active antenna
  • the third downlink branch and the fourth downlink branch each include a corrected downlink channel of the second active antenna, and the third corrected injection signal and the fourth corrected injection signal are in phase with each other;
  • the sixth correcting loopback signal, the seventh correcting loopback signal, The eighth correction loopback signal, the ninth correction loopback signal, and the tenth correction loopback signal, and the calculating the first downlink correction information and the second downlink correction information including:
  • the first possible implementation of the second aspect, the second possible implementation of the second aspect, the third possible implementation of the second aspect, and the fourth possible aspect of the second aspect includes: corresponding to each of the active antennas Uplink correction information; downlink correction information corresponding to each of the active antennas.
  • the The corrected channel of the source antenna is corrected, including:
  • two adjacent active antennas are connected through a correction cable, which reduces the consistency requirement of multiple cables, and when the channel is jointly corrected for multiple active antennas, The splitter, so there is no need to ensure that the cables connected between the multiple active antennas and the splitter are strict.
  • 1 is a schematic structural diagram of a system for channel joint correction of multiple active antennas provided by the prior art
  • 2 is a schematic structural diagram of a device for channel joint correction of multiple active antennas according to Embodiment 1 of the present invention
  • FIG. 3 is a flow chart of a method for channel joint correction of multiple active antennas according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a system for channel joint correction of multiple active antennas according to Embodiment 3 of the present invention.
  • FIG. 5 is a flow chart of a method for channel joint correction of multiple active antennas according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic diagram of a correction structure of an active uplink group corrected upstream channel according to Embodiment 3 of the present invention.
  • FIG. 7 is a schematic diagram of a correction structure of a corrected downlink channel of an active antenna group according to Embodiment 3 of the present invention.
  • FIG. 8 is a schematic structural diagram of a system for channel joint correction of another plurality of active antennas according to Embodiment 3 of the present invention.
  • FIG. 9 is a schematic structural diagram of a system for channel joint correction of another plurality of active antennas according to Embodiment 3 of the present invention.
  • FIG. 10 is a schematic structural diagram of a device for channel joint correction of multiple active antennas according to Embodiment 4 of the present invention. detailed description
  • FIG. 2 is a schematic structural diagram of a channel joint correcting apparatus for multiple active antennas according to an embodiment of the present invention.
  • the apparatus includes: line channel correction, obtaining correction information corresponding to each active antenna, and the active antenna group includes two adjacent active antennas of at least two active antennas;
  • the correction module 202 is configured to uniformly correct the correction information corresponding to each active antenna to obtain correction information corresponding to each active antenna;
  • a second correction module 203 configured to respectively correct each information according to each active antenna The corrected channel of the active antenna is corrected.
  • the first correction module 201 includes: a source antenna group, one active antenna in the active antenna group is used as the first active antenna, and the other active antenna is used as the second active antenna;
  • a first correcting unit configured to perform channel correction on the corrected uplink channel of the first active antenna and the corrected uplink channel of the second active antenna, to obtain first uplink correction information and second uplink correction information, and the first uplink correction
  • the information is uplink correction information corresponding to the first active antenna
  • the second uplink correction information is uplink correction information corresponding to the second active antenna
  • a second correcting unit configured to perform channel correction on the corrected downlink channel of the first active antenna and the corrected downlink channel of the second active antenna, to obtain first downlink correction information and second downlink correction information, first
  • the row correction information is downlink correction information corresponding to the first active antenna
  • the second downlink correction information is downlink correction information corresponding to the second active antenna.
  • the first correcting unit includes:
  • first injection subunit configured to inject a first correction injection signal on the first uplink branch to obtain a first correction loopback signal, and inject a second correction injection signal on the second uplink branch to obtain a second correction loopback signal
  • the first uplink branch and the second uplink branch each include a corrected uplink channel of the first active antenna, and the first corrected injection signal and the second corrected injection signal are in phase with each other;
  • a second injection subunit configured to inject a first correction injection signal on the third uplink branch to obtain a third correction loopback signal, and inject a second correction injection signal on the fourth uplink branch to obtain a fourth correction loopback signal
  • the third uplink branch and the fourth uplink branch each include a corrected uplink channel of the second active antenna
  • a third injection sub-unit configured to inject a second correction injection signal on the fifth uplink branch to obtain a fifth correction loopback signal, where the fifth uplink branch includes a corrected uplink channel of the first active antenna;
  • a first calculating subunit configured to calculate first uplink correction information according to the first corrected loopback signal, the second corrected loopback signal, the third corrected loopback signal, the fourth corrected loopback signal, and the fifth corrected loopback signal And second uplink correction information.
  • the first calculating subunit is specifically configured to:
  • the second correcting unit includes:
  • a fourth injection subunit configured to inject a third correction injection signal on the first downlink branch to obtain a sixth correction loopback signal, and inject the third correction injection signal on the second downlink branch to obtain a seventh correction a loopback signal
  • the first downlink branch and the second downlink branch each comprise a corrected downlink channel of the first active antenna
  • a fifth injection subunit configured to inject a fourth correction injection signal on the third downlink branch to obtain an eighth correction loopback signal, and inject the fourth correction injection signal on the fourth downlink branch to obtain a ninth correction loop
  • the back signal, the third downlink branch and the fourth downlink branch each comprise a corrected downlink channel of the second active antenna, and the third corrected injection signal and the fourth corrected injection signal are in phase with each other;
  • a sixth injection subunit configured to inject the third correction injection signal on the fifth downlink branch to obtain a tenth correction loopback signal, where the fifth downlink branch includes a corrected downlink channel of the first active antenna; a calculating subunit, configured to calculate first downlink correction information according to the sixth correction loopback signal, the seventh correction loopback signal, the eighth correction loopback signal, the ninth correction loopback signal, and the tenth correction loopback signal Second downlink correction information.
  • the second calculating subunit is specifically configured to:
  • the first downlink correction information and the second downlink correction information are calculated based on the ninth correction loopback signal, the tenth correction loopback signal, the third ratio, and the fourth ratio.
  • the correction module 202 includes: performing line correction to obtain uplink correction information corresponding to each active antenna; and performing unified correction to obtain downlink correction information corresponding to each active antenna.
  • the second correction module 203 includes:
  • a first correcting unit configured to respectively correct a corrected uplink channel of each active antenna according to uplink correction information corresponding to each active antenna
  • the second correcting unit is configured to respectively correct the corrected downlink channel of each active antenna according to the downlink correction information corresponding to each active antenna.
  • two adjacent active antennas are connected through a calibration cable to reduce The consistency requirement of multiple cables, and the channel joint correction for multiple active antennas, does not involve the splitter, so there is no need to ensure the cable connecting multiple active antennas and the splitter. strict. " , " Example 2
  • FIG. 3 is a flow chart of a channel joint correction method for multiple active antennas according to an embodiment of the present invention.
  • the method includes: obtaining correction information corresponding to each active antenna, the active antenna group including two adjacent active antennas of at least two active antennas.
  • Step 302 Perform unified correction on the correction information corresponding to each active antenna to obtain correction information corresponding to each active antenna.
  • Step 303 Correct the corrected channel of each active antenna according to the correction information corresponding to each active antenna.
  • the correction information corresponding to each active antenna includes: one active antenna in the active antenna group as the first active antenna and the other active antenna as the second active antenna;
  • first uplink correction information is the first active antenna
  • second uplink correction information is uplink correction information corresponding to the second active antenna
  • first downlink correction information is first The downlink correction information corresponding to the source antenna
  • second downlink correction information is downlink correction information corresponding to the second active antenna
  • performing channel correction on the corrected uplink channel of the first active antenna and the corrected uplink channel of the second active antenna, to obtain first uplink correction information and second uplink correction information including: Injecting a first corrected injection signal on the road to obtain a first corrected loopback signal, and Injecting a second corrected injection signal on the second uplink branch to obtain a second corrected loopback signal, wherein the first uplink branch and the second uplink branch both comprise the corrected uplink channel of the first active antenna, and the first correction injection The signal and the second corrected injection signal are in phase with each other;
  • the four uplink branches each include a corrected upstream channel of the second active antenna
  • the first uplink correction information and the second uplink correction information are calculated based on the first correction loopback signal, the second correction loopback signal, the third correction loopback signal, the fourth correction loopback signal, and the fifth correction loopback signal.
  • calculating uplink correction information according to the first corrected loopback signal, the second corrected loopback signal, the third corrected loopback signal, the fourth corrected loopback signal, and the fifth corrected loopback signal including:
  • the first uplink correction information and the second uplink correction information are calculated according to the fourth corrected loopback signal, the fifth corrected loopback signal, the first ratio, and the second ratio.
  • performing channel correction on the corrected downlink channel of the first active antenna and the corrected downlink channel of the second active antenna, to obtain the first downlink correction information and the second downlink correction information including:
  • the first downlink branch includes a corrected downlink channel of the first active antenna
  • the four downlink branches each include a corrected downlink channel of the second active antenna, and the third corrected injection signal and the fourth corrected injection signal are in phase with each other;
  • the first downlink correction information and the second downlink correction information are calculated according to the sixth correction loopback signal, the seventh correction loopback signal, the eighth correction loopback signal, the ninth correction loopback signal, and the tenth correction loopback signal.
  • calculating first downlink correction information and second according to the sixth correction loopback signal, the seventh correction loopback signal, the eighth correction loopback signal, the ninth correction loopback signal, and the tenth correction loopback signal Downstream correction information, including:
  • the first downlink correction information and the second downlink correction information are calculated based on the ninth correction loopback signal, the tenth correction loopback signal, the third ratio, and the fourth ratio.
  • the correction information corresponding to each active antenna is uniformly corrected, and the correction information corresponding to each active antenna is obtained, including: uplink correction information corresponding to the active antennas; and downlink correction information corresponding to the active antennas. .
  • correcting the corrected channel of each active antenna according to the correction information corresponding to each active antenna including:
  • the corrected downstream channel of each active antenna is separately corrected based on the downlink correction information corresponding to each active antenna.
  • two adjacent active antennas are connected through a correction cable, which reduces the consistency requirement of multiple cables, and when the channel is jointly corrected for multiple active antennas, The splitter, so there is no need to ensure that the cables connected between the multiple active antennas and the splitter are strict.
  • a correction cable which reduces the consistency requirement of multiple cables, and when the channel is jointly corrected for multiple active antennas, The splitter, so there is no need to ensure that the cables connected between the multiple active antennas and the splitter are strict.
  • Embodiments of the present invention provide a channel joint correction method for multiple active antennas.
  • FIG. 4 a schematic diagram of a system for channel joint correction of multiple active antennas is provided, in which a plurality of active antennas AAS and BBU (Base Band Processing Module) are included.
  • a plurality of active antennas are connected in series by a correction cable, and each active antenna is connected to the BBU, and each of the active antennas includes at least one of a corrected upstream channel and a corrected downstream channel.
  • the embodiment of the invention can be used
  • the cloud ⁇ Ming, ⁇ ] 3 ⁇ 4 f port is corrected by the corrected downstream channel. See Figure 5, the method includes: a line group, one active antenna in the active antenna group is used as the first active antenna, and the other is The active antenna acts as a second active antenna.
  • the at least two active antennas in series may be divided into a plurality of active antenna groups, each active antenna group including two adjacent active antennas.
  • the series AAS1, AAS2, and AAS3 can be divided into two active antenna groups, that is, AAS1 and AAS2 are divided into the first active antenna group, and AAS2 and AAS3 are divided into the second one. Source antenna group.
  • channel correction is performed for each active antenna group to obtain correction information corresponding to each active antenna group, and the correction information includes uplink correction information and downlink correction information.
  • Step 502 performing channel correction on the corrected uplink channel of the first active antenna and the corrected uplink channel of the second active antenna, to obtain first uplink correction information and second uplink correction information, where the first uplink correction information is first.
  • the uplink correction information corresponding to the active antenna, and the second uplink correction information is uplink correction information corresponding to the second active antenna.
  • a correction channel is also provided inside the active antenna and the second active antenna.
  • it also includes a connection channel connecting the two active antennas. Therefore, the corrected uplink channel, the correction channel and the connection channel of the two active antennas can be combined into multiple uplink branches to implement the corrected uplink of the corrected uplink channel and the second active antenna of the first active antenna.
  • the channel is channel corrected.
  • sub-pictures are included in FIG. 6, in which AAS1 is the first active antenna and AAS2 is the second active antenna.
  • the first uplink branch is composed of al, nl and rl
  • the second uplink branch is composed of a2, x2 and rl.
  • the third uplink branch is composed of al, xl and r2
  • the fourth uplink branch is composed of a2, n2 and r2.
  • subgraph (c) a5, x2 and rl form the fifth uplink branch, in subgraph (c), the up branch consisting of a2, n2 and r2 and the fourth part of subgraph (b)
  • the uplink branch is the same, so in subgraph (c), a2
  • the upstream branch consisting of n2 and r2 is called the fourth uplink branch.
  • pi in the BBU is the first corrected injection signal
  • p2 is the second corrected injection signal
  • pi and p2 are in phase with each other.
  • Ql and q2 are correction loopback signals
  • al and a2 are the active portions of the correction channel
  • nl and n2 are the passive portions of the correction channel
  • nl n2.
  • Rl and r2 are the corrected upstream channels
  • xl and x2 are the channel functions of the correction cables connecting the two active antennas
  • X 1 and x 2 respectively corresponding to the two different directions of the correction cable
  • X 1 x 2 .
  • step 502 can be implemented by the following steps (1) - (4), including:
  • the branch and the second uplink branch each comprise a corrected upstream channel of the first active antenna, and the first corrected injection signal and the second corrected injection signal are in phase with each other.
  • calculating a first ratio between the first corrected loopback signal and the second corrected loopback signal calculating a second ratio between the third corrected loopback signal and the fourth corrected loopback signal; according to the fourth correcting loop a back signal, a fifth corrected loopback signal, a first ratio and a second ratio, and the first uplink correction information and the first Two uplink correction information.
  • the specific operations of calculating the first uplink correction information and the second uplink correction information may be: according to the fourth correction loopback signal, the fifth correction loopback signal, the first ratio, and the For the second ratio, the first up-correction information and the second up-correction information are calculated according to the following formula (1).
  • the first uplink correction information and the second uplink correction information are represented by a ratio.
  • the first uplink correction information and the second uplink correction information may be multiples of the ratio.
  • the first uplink correction information and the second uplink correction information are further modified, so that the denominator of the ratio can be used as the first uplink correction information, and the numerator of the ratio is used as the second uplink. Correction information.
  • channel correction may be performed not only on the corrected uplink channel of the first active antenna but also on the corrected uplink channel of the second active antenna through the respective uplink branches in FIG. 6 .
  • Other branches may also be derived from FIG. 6 to perform channel correction on the corrected upstream channel of the first active antenna and the corrected upstream channel of the second active antenna. The embodiment of the present invention does not specifically limit this.
  • Step 503 Perform channel correction on the corrected downlink channel of the first active antenna and the corrected downlink channel of the second active antenna to obtain first downlink correction information and second downlink correction information.
  • the first active antenna and the second active antenna both include the corrected downlink channel, and the channel correction is performed on the corrected downlink channel of the first active antenna and the corrected downlink channel of the second active antenna, A correction channel is also provided inside the active antenna and the second active antenna.
  • a connection channel connecting the two active antennas is also included. Therefore, the corrected downlink channel, the correction channel and the connection channel of the two active antennas can be combined into multiple downlink branches to implement the corrected downlink of the corrected downlink channel and the second active antenna of the first active antenna.
  • the channel is channel corrected. For example, as shown in FIG. 7, three subgraphs are included in FIG. 7.
  • subgraph (a) bl, ml, and tl constitute a first downlink branch, and b2, x2, and tl constitute a second downlink branch. road.
  • subgraph (b) bl, xl and t2 form a third downlink branch, and b2, m2 and t2 form a fourth downlink branch.
  • subgraph (c) b5, x2 and tl form the fifth downlink branch, in subgraph (c), b2, m2 and t2 form the lower branch and subgraph (b)
  • the downlink branches are the same, so the downlink branch composed of b2, m2 and t2 in subgraph (c) is called the fourth downlink branch.
  • si in the BBU is the third corrected injection signal
  • s2 is the fourth corrected injection signal
  • si and s2 are in phase with each other.
  • Yl and y2 are the correct loop signals
  • bl and b2 are the active parts of the correction channel
  • ml and m2 are the passive parts of the correction channel
  • ml m2.
  • T1 and t2 are the corrected downstream channels
  • xl and x2 are the channel functions of the correction cable connecting the two active antennas
  • xl and x2 respectively correspond to two different directions of the correction cable
  • xl x2.
  • step 503 can be implemented by the following steps (1) - (4), including:
  • first Both the downlink branch and the second downlink branch comprise a corrected downstream channel of the first active antenna.
  • the third corrected injection signal sl is injected on the second downlink branch in the sub-picture (a) to obtain a seventh corrected loopback signal y21, which is ql*tl*x2*b2.
  • a fourth corrected injection signal s2 is injected on the fourth downlink branch in the sub-picture (b) to obtain a ninth corrected loopback signal y22, which is s2*t2*m2*b2.
  • the third corrected injection signal sl may be injected on the fifth downlink branch in the sub-picture (c) of FIG. 7 to obtain a tenth corrected loopback signal y23, which is a sl*tl*x2 *b2. (4) calculating, according to the sixth correction loopback signal, the seventh correction loopback signal, the eighth correction loopback signal, the ninth correction loopback signal, and the tenth correction loopback signal, the first downlink correction information and the second Downstream correction information.
  • the back signal, the tenth correction loopback signal, the third ratio and the fourth ratio calculate the first downlink correction information and the second downlink correction information.
  • the specific operation of calculating the downlink correction information may be: according to the ninth correction loopback signal, the tenth correction loopback signal, the third ratio, and the fourth ratio, according to the following formula (2) Calculating the first downlink correction information.
  • j1 is the first downlink correction information
  • j2 is the second downlink correction information
  • y23 is the tenth correction loopback signal
  • y22 is the ninth correction loopback signal
  • f2 is the fourth ratio
  • fl is the third ratio.
  • the first downlink correction information and the second downlink correction information are represented by a ratio. In fact, the first downlink correction information and the second downlink correction information may be the ratio.
  • the first downlink correction information and the second downlink correction information need to be corrected later, so the denominator of the ratio can be used as the first downlink correction information, and the ratio of the numerator As the second downlink correction information.
  • channel correction may be performed not only on the corrected downlink channel of the first active antenna but also on the corrected downlink channel of the second active antenna through the respective downlink branches in FIG. 7 .
  • Other branches may also be derived from FIG. 7 to perform channel correction on the corrected downstream channel of the first active antenna and the corrected downstream channel of the second active antenna. The embodiment of the present invention does not specifically limit this.
  • the first corrected injection signal may be equal to or different from the third corrected injection signal, and the second corrected injection signal may be equal to the fourth corrected injection signal, or may be not equal. That is, the first corrected injection signal and the second corrected injection signal The number, the third corrected injection signal, and the fourth corrected injection signal may or may not be equal.
  • the correction information may be performed in accordance with the steps of 501-503 for the other active antenna groups.
  • the school information ⁇ E information is unified ⁇ positive, found, ⁇ ⁇ source, antenna corresponding, upper ⁇ positive letter., a message, calculate the uplink correction information corresponding to each active antenna, so that each active antenna is The values obtained by multiplying the corrected upstream channels by the corresponding uplink correction information are equal.
  • three active antennas in series can form two active antenna groups, namely active antenna group 1 and active antenna group 2.
  • the active antenna group 1 includes corrected upstream channels rl and r2, and the active antenna group 2 includes corrected upstream channels r2 and r3.
  • the uplink correction information corresponding to the active antenna 1 in the active antenna group 1 is hll
  • the uplink correction information corresponding to the active antenna 2 in the active antenna group 2 is calculated as h22 by the step 502, and the uplink correction information corresponding to the active antenna 3 is h32, that is, ⁇ , that is,
  • R3 hll ⁇ 2 ⁇ h22 r3 x h32.
  • Correction find, the corresponding source antenna, and ⁇ correction letter. And a message, calculating downlink correction information corresponding to each active antenna, so that the corrected downlink channels in each active antenna are respectively multiplied by the corresponding downlink correction information to obtain equal values.
  • At least two active antennas are connected in series, and after channel correction of the active antenna group included in at least two active antennas connected in series, there may be an error between each active antenna group. accumulation. Therefore, after channel correction is performed for each active antenna group, the correction information obtained by the channel correction needs to be corrected to eliminate the error accumulation.
  • Step 506 Correct the corrected uplink channel of each active antenna according to the uplink correction information corresponding to each active antenna.
  • multiplying the corrected uplink channel of each active antenna by the uplink corresponding to the active antenna for example, for the active antenna group in steps 501-503
  • multiplying the corrected uplink channel of the first active antenna Correction of the corrected upstream channel of the first active antenna is implemented by the uplink correction information corresponding to the first active antenna.
  • the corrected upstream channel of the second active antenna is multiplied by the uplink correction information corresponding to the second active antenna to achieve correction of the corrected upstream channel of the second active antenna.
  • Step 507 Correct the corrected downlink channel of the at least two active antennas according to downlink correction information corresponding to the at least two active antennas.
  • the corrected downlink channel of the first active antenna is multiplied by the downlink correction information corresponding to the first active antenna to implement a corrected downlink channel for the first active antenna.
  • the corrected downlink channel of the second active antenna is multiplied by the downlink correction information corresponding to the second active antenna to implement correction of the corrected downlink channel of the second active antenna.
  • channel joint correction of multiple active antennas can be performed not only in the BBU by the above method, as shown in FIG. 8.
  • Each AAS in Figure 8 includes a board calibration inside, and a cross-board correction is included inside the BBU. The board calibration is to correct the AAS itself, and the cross-board correction is the correction described in 501-507 above.
  • channel joint correction may be performed on multiple active antennas within the AAS, as shown in FIG.
  • a forwarding interface is set in the BBU.
  • the BBU injects the corrected injection signal into the branch described in the above step
  • the corrected loopback signal is forwarded to the BBU.
  • AAS1 performs channel joint correction on the plurality of active antennas according to the received corrected loopback signal.
  • the present invention is the same as the process in which the AAS1 performs channel joint correction on the plurality of active antennas according to the received corrected loopback signal and the process in which the BBU performs channel joint correction on the plurality of active antennas according to the received corrected loopback signal. The embodiment will not be described in detail herein.
  • two adjacent active antennas are connected through a correction cable, which reduces the consistency requirement of multiple cables, and when the channel is jointly corrected for multiple active antennas, The splitter, so there is no need to ensure a strict line of cables between the multiple active antennas and the splitter.
  • the corrected correction information is uniformly corrected, and the corrected channel of the active antenna is corrected according to the modification information, thereby avoiding correction of multiple active antennas. The error accumulated.
  • FIG. 10 is a schematic structural diagram of a channel joint correction apparatus for multiple active antennas according to an embodiment of the present invention.
  • the apparatus includes: a memory 1001 and a processor 1002, configured to perform a channel joint correction method for a plurality of active antennas as follows, including:
  • the correction information corresponding to each active antenna includes: one active antenna in the active antenna group as the first active antenna and the other active antenna as the second active antenna;
  • first uplink correction information is the first active antenna
  • second uplink correction information is uplink correction information corresponding to the second active antenna
  • first downlink correction information is first The downlink correction information corresponding to the source antenna
  • second downlink correction information is downlink correction information corresponding to the second active antenna
  • performing channel correction on the corrected uplink channel of the first active antenna and the corrected uplink channel of the second active antenna, to obtain the first uplink correction information and the second uplink correction information including:
  • the two uplink branches each include a corrected uplink channel of the first active antenna, and the first corrected injection signal and the second corrected injection signal are in phase with each other;
  • the four uplink branches each include a corrected upstream channel of the second active antenna
  • the first uplink correction information and the second uplink correction information are calculated based on the first correction loopback signal, the second correction loopback signal, the third correction loopback signal, the fourth correction loopback signal, and the fifth correction loopback signal.
  • calculating uplink correction information according to the first corrected loopback signal, the second corrected loopback signal, the third corrected loopback signal, the fourth corrected loopback signal, and the fifth corrected loopback signal including:
  • performing channel correction on the corrected downlink channel of the first active antenna and the corrected downlink channel of the second active antenna, to obtain the first downlink correction information and the second downlink correction information including:
  • the first downlink branch includes a corrected downlink channel of the first active antenna
  • the four downlink branches each include a corrected downlink channel of the second active antenna, and the third corrected injection signal and the fourth corrected injection signal are in phase with each other;
  • the first downlink correction information and the second downlink correction information are calculated based on the sixth correction loopback signal, the seventh correction loopback signal, the eighth correction loopback signal, the ninth correction loopback signal, and the tenth correction loopback signal.
  • calculating first downlink correction information and second according to the sixth correction loopback signal, the seventh correction loopback signal, the eighth correction loopback signal, the ninth correction loopback signal, and the tenth correction loopback signal Downstream correction information including:
  • the first downlink correction information and the second downlink correction information are calculated based on the ninth correction loopback signal, the tenth correction loopback signal, the third ratio, and the fourth ratio.
  • the correction information corresponding to each active antenna is uniformly corrected, and the correction information corresponding to each active antenna is obtained, including: uplink correction information corresponding to the active antennas; and downlink correction information corresponding to the active antennas. .
  • Positive channel correction including:
  • the corrected downstream channel of each active antenna is separately corrected based on the downlink correction information corresponding to each active antenna.
  • two adjacent active antennas are connected through a correction cable, which reduces the consistency requirement of multiple cables, and when the channel is jointly corrected for multiple active antennas, The splitter, so there is no need to ensure that the cables connected between the multiple active antennas and the splitter are strict.
  • a person skilled in the art can understand that all or part of the steps of implementing the foregoing embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned above may be a read only memory, a magnetic disk or an optical disk or the like. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are within the spirit and scope of the present invention, should be included in the protection of the present invention. Within the scope.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur le champ technique de la communication sans fil. Selon un mode de réalisation, la présente invention concerne un procédé et un dispositif d'étalonnage conjoint des canaux d'une pluralité d'antennes actives, le procédé consistant : à étalonner les canaux d'un groupe d'antennes actives connectées en série et comprenant au moins deux antennes actives pour obtenir les informations d'étalonnage correspondant à chaque antenne active, le groupe d'antennes actives comprenant deux antennes actives voisines parmi les au moins deux antennes actives ; à amender uniformément les informations d'étalonnage correspondant à chaque antenne active pour obtenir les informations d'amendement correspondant à chaque antenne active ; et en fonction des informations d'amendement correspondant à chaque antenne active, à amender respectivement le canal étalonné de chaque antenne active. Le dispositif comprend un premier module d'étalonnage, un module d'amendement et un second module d'étalonnage. La présente invention réduit l'exigence de cohérence d'une pluralité de câbles, sans assurer la même longueur exacte des câbles connectés entre la pluralité des antennes actives et un combineur/diviseur, et étend de manière flexible l'antenne active nécessitant un étalonnage.
PCT/CN2014/079333 2014-06-06 2014-06-06 Procédé et dispositif d'étalonnage conjoint des canaux d'une pluralité d'antennes actives WO2015184632A1 (fr)

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PCT/CN2014/079333 WO2015184632A1 (fr) 2014-06-06 2014-06-06 Procédé et dispositif d'étalonnage conjoint des canaux d'une pluralité d'antennes actives

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