JP2013016970A - Isolation adjuster, isolation adjustment method and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine the length of a phase correction cable to be used when adjusting the phases of both transmission and reception by the same phase correction cable, in order to improve isolation between a service antenna and a donor antenna in a direct relay repeater of FDD system.SOLUTION: A database 5 stores the data of phase shift amount for each of a plurality of phase correction cables having different lengths, and stores the measured values in the reception band and transmission band of the amount of isolation between a service antenna 12 and a donor antenna 11 for each phase shift amount and for the reception band and transmission band of a direct relay repeater 10. Based on the measured values of the amount of isolation corresponding to the phase shift amount of the phase correction cable, a determination unit 6 determines the phase correction cable which maximizes the amount of isolation in the reception band and transmission band of the direct relay repeater 10.

Description

  The present invention relates to an isolation adjustment device, an isolation adjustment method, and a computer program.

  Conventionally, in a direct repeater type repeater apparatus, in order to avoid sneak oscillation, it is necessary to secure isolation between a service area construction antenna (hereinafter referred to as a service antenna) and a master station antenna (hereinafter referred to as a donor antenna). It has been broken. Technologies for ensuring isolation between antennas include sufficient separation between the service antenna and the donor antenna, improvement of the front-back ratio and sidelobe ratio of the antenna itself, and polarization between the service antenna and the donor antenna. Is known to have a relationship of orthogonal polarization (vertical polarization and horizontal polarization, right-handed circular polarization and left-handed circular polarization, etc.). Especially when the service antenna and donor antenna are back-to-back (separation angle between the service antenna and donor antenna is 180 degrees), the polarization relationship between the service antenna and the donor antenna is made orthogonal, so that Can be improved.

  However, if the separation angle between the service antenna and the donor antenna is small, the direct coupling component between the antennas includes not only simple back lobe coupling but also coupling by the main beam. There is a possibility that the orthogonality of the polarization is lost and the isolation is deteriorated. In addition, if there is a reflector around the service antenna, the radio wave radiated from the service antenna is input as a reflected wave to the donor antenna. At this time, if the polarization of the transmitted wave is preserved even if it is a reflected wave, if the polarization of the donor antenna is orthogonal to the polarization of the service antenna, the donor antenna is less likely to receive the reflected wave. Can be improved. However, since reflected waves generally generate cross polarization due to scattering, the polarization of the transmission wave is not completely preserved, and the orthogonality may be lost in the transmission path, which may degrade isolation. For example, Patent Document 1 discloses a technique for improving the isolation by correcting the broken orthogonality. In the prior art described in Patent Document 1, the best phase shift amount is measured using a variable phase shifter, and the phase is corrected by the best phase shift amount using a variable phase shifter.

JP 2010-081307 A

  However, in the conventional technique described in Patent Document 1 described above, the phase is adjusted using a variable phase shifter even during actual operation. Therefore, the direct repeater repeater apparatus always includes an expensive variable phase shifter. This is one of the factors that increase costs. For this reason, at the time of operation, there is a demand for adjusting the phase using an inexpensive phase correction cable instead of the variable phase shifter.

  The problem here is in the case of a frequency division duplex (FDD) system in which different frequencies are assigned to transmission and reception. Since the isolation characteristic has a frequency characteristic, in the case of the FDD system, the isolation frequency characteristic differs between the transmission band and the reception band. On the other hand, the phase shift amount of the phase correction cable is determined by the cable length. Therefore, it is difficult to satisfy the best phase shift amount for both transmission and reception with the same phase correction cable. For this reason, it is a problem to determine how long a phase correction cable should be used.

  The present invention has been made in consideration of such circumstances, and in a FDD direct repeater repeater, transmission and reception are performed using the same phase correction cable in order to improve isolation between a service antenna and a donor antenna. It is an object of the present invention to provide an isolation adjustment device, an isolation adjustment method, and a computer program capable of determining how long a phase correction cable should be used when adjusting both phases. .

  In order to solve the above-described problem, the isolation adjustment apparatus according to the present invention transmits and receives signals with the same phase correction cable in order to improve isolation between a service antenna and a donor antenna in an FDD direct repeater repeater apparatus. A first database that stores phase shift data for each of a plurality of phase correction cables having different cable lengths, and an isolation adjustment device that determines a phase correction cable when adjusting both of the phases; A second value that stores a measurement value of a reception band and a measurement value of a transmission band of the isolation amount between the service antenna and the donor antenna for each phase shift amount with respect to the reception band and the transmission band of the direct repeater repeater device And a measured value of the isolation amount corresponding to the phase shift amount of the phase correction cable. Characterized in that and a determination unit for determining a phase correction cables to maximize the isolation amount in the reception band and transmission band of the direct relay type repeater device.

  In the isolation adjustment device according to the present invention, the determination unit sets the smaller one of the measurement values of the isolation amount corresponding to the phase shift amount of the phase correction cable as the isolation amount of the phase correction cable, and The phase correction cable having the maximum amount is selected.

  In the isolation adjustment device according to the present invention, the determination unit determines whether the reception band and the transmission band are different when comparing the measurement value of the isolation amount of the reception band and the measurement value of the isolation amount of the transmission band. Weighting is performed.

  In the isolation adjustment device according to the present invention, a variable phase shifter that changes a phase of a signal between the service antenna and the donor antenna, a network analyzer that measures an isolation amount between the service antenna and the donor antenna, The phase shift amount is instructed to the variable phase shifter, the measurement value of the isolation amount corresponding to the instructed phase shift amount is received from the network analyzer, and the data of the set of the phase shift amount and the measurement value of the isolation amount is received. And a controller for recording in the second database.

  The isolation adjustment method according to the present invention adjusts both transmission and reception phases with the same phase correction cable in order to improve isolation between a service antenna and a donor antenna in an FDD direct repeater repeater apparatus. A determination unit that determines a phase correction cable, a first database that stores phase shift data for each of a plurality of phase correction cables having different cable lengths, and a reception band and a transmission band of the direct repeater repeater device On the other hand, for each phase shift amount, a second database that stores a measurement value of a reception band and a measurement value of a transmission band of an isolation amount between the service antenna and the donor antenna, and the determination unit includes: Based on the measured value of the isolation amount corresponding to the phase shift amount of the phase correction cable, the direct relay type repeater device Determining a phase compensation cable to maximize the isolation amount in the reception band and transmission band, characterized in that.

In the computer program according to the present invention, in the FDD direct repeater repeater device, the phase correction is performed when both the transmission and reception phases are adjusted by the same phase correction cable in order to improve the isolation between the service antenna and the donor antenna. A computer program for performing an isolation adjustment process for determining a cable, wherein the first database stores phase shift amount data for each of a plurality of phase correction cables having different cable lengths, and the second database The reception band measurement value and the transmission band measurement value of the isolation amount between the service antenna and the donor antenna are stored for each phase shift amount with respect to the reception band and transmission band of the direct relay repeater device. , Based on the measured value of the isolation amount corresponding to the phase shift amount of the phase correction cable. Te, characterized in that it is a computer program for executing the phase correction cables to maximize the isolation amount in the reception band and transmission band of the direct relay type repeater device determining the computer.
As a result, the isolation adjusting device described above can be realized using a computer.

  According to the present invention, in an FDD direct repeater repeater device, when adjusting both transmission and reception phases with the same phase correction cable in order to improve isolation between a service antenna and a donor antenna, how much It is possible to determine whether a cable length phase correction cable should be used.

It is a block diagram which shows the structure of the isolation adjustment apparatus 1 which concerns on one Embodiment of this invention. 2 is a configuration example of a direct relay repeater device 10 during operation according to the embodiment. It is a flowchart of the isolation adjustment process which concerns on one Embodiment of this invention. It is a flowchart of the isolation adjustment process which concerns on one Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of an isolation adjustment device 1 according to an embodiment of the present invention. The isolation adjustment device 1 uses a phase correction cable of how much phase shift amount (cable length) to improve the isolation between the donor antenna 11 and the service antenna 12 in the FDD direct repeater repeater device 10. Judge what to do. FIG. 2 shows a configuration example of the direct relay repeater device 10 during operation according to the present embodiment. As shown in FIG. 2, during operation, the direct repeater repeater apparatus 10 uses the phase correction cable C to adjust both the transmission and reception phases. The wireless device 20 has an FDD direct relay function.

  In FIG. 1, the isolation adjustment device 1 includes a variable phase shifter 2, a control unit 3, a network analyzer 4, a database 5, and a determination unit 6. The variable phase shifter 2 is connected between the terminal P connected to the horizontal polarization port H of the service antenna 12 and the two distributors 14 using test cables A and B. The variable phase shifter 2 can correct the phases of the transmission signal and the reception signal via the service antenna 12 by shifting the phase by the phase shift amount instructed from the control unit 3.

  The network analyzer 4 is connected to a two distributor 13 to which the donor antenna 11 is connected and a two distributor 14 to which the service antenna 12 is connected. The network analyzer 4 measures the amount of isolation between the donor antenna 11 and the service antenna 12. The network analyzer 4 outputs the measurement value of the isolation amount to the control unit 3.

  The control unit 3 instructs the variable phase shifter 2 on the amount of phase shift, and receives a measurement value of the isolation amount corresponding to the instructed phase shift amount from the network analyzer 4. The control unit 3 records data of a set of the phase shift amount and the measurement value of the isolation amount in the database 5.

  The database 5 stores data of a set of the phase shift amount and the measurement value of the isolation amount received from the control unit 3. Further, the database 5 has phase shift amount data for each cable length of the phase correction cable that can be used when the direct repeater repeater apparatus 10 is operated. For example, a total of 36 types of phase correction cables can be used with phase shift amounts ranging from 0 degrees to 350 degrees in 10 degree increments.

  The determination unit 6 uses the data in the database 5 to determine the phase correction cable C to be used by the direct repeater apparatus 10 during operation. As shown in FIG. 2, the phase correction cable C that is the determination result is connected between the terminal P connected to the horizontal polarization port H of the service antenna 12 and the two distributors 14 in the direct repeater repeater apparatus 10. Used as a connecting cable. Thereby, the phase of the transmission signal and the reception signal via the service antenna 12 can be corrected using the phase correction cable C.

  In the direct relay repeater device 10, the two distributors 13 and 14 may be 3 dB directional couplers. Further, the vertical horizontal polarization (VH polarization) may be ± 45 degree polarization, or may be right / left-hand polarization.

  Next, the operation of the isolation adjusting device 1 shown in FIG. 1 will be described with reference to FIGS. 3 and 4 are flowcharts of the isolation adjustment process according to the present embodiment.

First, the variables are explained.
P1 [deg]: A phase shift amount of the reception band that the control unit 3 instructs the variable phase shifter 2.
ΔP1 [deg]: Unit of change amount (step amount) of the phase shift amount P1 of the reception band.
P2 [deg]: The amount of phase shift of the transmission band that the control unit 3 instructs the variable phase shifter 2.
ΔP2 [deg]: Unit of change amount (step amount) of the phase shift amount P2 of the transmission band.
P3 [deg]: Phase shift amount of the phase correction cable.
ΔP3 [deg]: Unit of change amount (step amount) of the phase shift amount P3.
ISO1: A measure of the amount of isolation in the reception band.
ISO2: A measure of isolation in the transmission band.
ISO3: Isolation amount corresponding to phase shift amount P3.

[Measurement stage]
With reference to FIG. 3, the process of the step of measuring the amount of isolation will be described.

  Step S1: The control unit 3 initializes a data storage area of a set of the phase shift amount and the measurement value of the isolation amount in the variable phase shifter 2, the network analyzer 4, and the database 5. Further, the control unit 3 sets both the phase shift amount P1 and the phase shift amount P2 to 0 for the variable phase shifter 2. At this initialization stage, the variable phase shifter 2 does not shift the phase of the reception band or the phase of the transmission band (P1 = P2 = 0 degree).

  Step S2: The control unit 3 instructs the network analyzer 4 to measure the isolation amount. Thereby, the network analyzer 4 measures the isolation amount of the reception band and the isolation amount of the transmission band. The network analyzer 4 outputs the measurement values ISO1 and ISO2 of the isolation amount, which are measurement results, to the control unit 3. The control unit 3 records data of a set of the phase shift amount P1 and the isolation amount measurement value ISO1 related to the reception band and the phase shift amount P2 and the isolation amount measurement value ISO2 related to the transmission band in the database 5. .

  Step S3: The control unit 3 determines whether the phase shift amount P1 of the reception band is 360 degrees or more. As a result, when the phase shift amount P1 of the reception band is 360 degrees or more, the process proceeds to step S5. On the other hand, if the phase shift amount P1 of the reception band is less than 360 degrees, the process proceeds to step S4.

  Step S4: The control unit 3 sets the variable phase shifter 2 by adding the step amount ΔP1 to the phase shift amount P1 of the reception band. As a result, the variable phase shifter 2 shifts the phase of the reception band by the phase shift amount P1, and shifts the phase of the transmission band by the phase shift amount P2. Thereafter, the process returns to step S2.

  Step S5: The control unit 3 determines whether the phase shift amount P2 of the transmission band is 360 degrees or more. As a result, when the phase shift amount P2 of the transmission band is 360 degrees or more, the process proceeds to step S11 in FIG. On the other hand, if the phase shift amount P2 of the transmission band is less than 360 degrees, the process proceeds to step S6.

  Step S6: The control unit 3 sets the variable phase shifter 2 by adding the step amount ΔP2 to the phase shift amount P2 of the transmission band. As a result, the variable phase shifter 2 shifts the phase of the reception band by the phase shift amount P1, and shifts the phase of the transmission band by the phase shift amount P2. Thereafter, the process returns to step S2.

  If the phase shift amount P2 of the transmission band is 360 degrees or more in step S5 in FIG. 3, the process of measuring the isolation amount ends. As a result, in the database 5, the phase shift amount P1 of the reception band is a value from 0 degree to 360 degrees in steps of ΔP1, and the phase shift amount P2 of the transmission band is from 0 degrees to 360 degrees in steps of ΔP2. For each combination with the above value, the measurement value ISO1 of the isolation amount corresponding to the phase shift amount P1 and the measurement value ISO2 of the isolation amount corresponding to the phase shift amount P2 are stored.

[Judgment stage]
With reference to FIG. 4, the process of the stage which determines a phase correction cable is demonstrated.

  Step S11: The determination unit 6 determines from the database 5 the measurement value of the isolation amount corresponding to the phase shift amount P1 of the set in which the phase shift amount P1 of the reception band is 0 degrees and the phase shift amount P2 of the transmission band is 0 degrees. Read ISO1 and measurement value ISO2 of the isolation amount corresponding to phase shift amount P2. Then, the determination unit 6 sets the read “P1 = 0, ISO1” as the initial data of the reception band and “P2 = 0, ISO2” as the initial data of the transmission band.

  Step S12: The determination unit 6 reads out the data of the phase shift amount P3 for each phase correction cable from the database 5. Then, the determination unit 6 sets the minimum phase shift amount P3 among the read values as the initial value of the phase shift amount P3.

  Step S13: The determination unit 6 determines whether or not the phase shift amount P3 is 360 degrees or more. As a result, when the phase shift amount P3 is 360 degrees or more, the process proceeds to step S18. On the other hand, if the phase shift amount P3 is less than 360 degrees, the process proceeds to step S14.

  Step S14: The determination unit 6 reads “a set of the measurement value ISO1 of the isolation amount in the reception band and the measurement value ISO2 of the isolation amount in the transmission band” corresponding to the phase shift amount P3 from the database 5. Specifically, the database 5 searches for and reads “measurement value ISO1 of the isolation amount, measurement value ISO2 of the isolation amount” associated with “P1 = P3, P2 = P3”.

  Step S15: The determination unit 6 uses the measurement value of the smaller isolation amount of the “isolation amount measurement value ISO1” and the “isolation amount measurement value ISO2” acquired in step S14 as the phase shift amount P3. Isolation amount corresponding to ISO3.

  Step S16: The determination unit 6 determines the smaller one of the measured values ISO1 and ISO2 of the isolation amount in the initial data “P1 = 0, ISO1” of the reception band and the initial data “P2 = 0, ISO2” of the transmission band. The difference between the measured value of the amount and the isolation amount ISO3 obtained in step S15 is calculated. The determination unit 6 sets this difference as an improvement amount ΔISO of the isolation amount corresponding to the phase shift amount P3. Then, the determination unit 6 stores the “phase shift amount P3”, “isolation amount ISO3”, and “isolation amount improvement amount ΔISO” in the database 5 in association with each other.

  Step S17: The determination unit 6 adds the step amount ΔP3 to the phase shift amount P3. Thereafter, the process returns to step S13. The step amount ΔP3 of the phase shift amount P3 corresponds to a unit of change amount of the phase shift amount P3 between the phase correction cables. For example, a total of 36 types of phase correction cables can be used in which the phase shift amount P3 is from 0 degrees to 10 degrees (ΔP3 = 10 degrees) up to 350 degrees.

  Step S18: When the phase shift amount P3 is 360 degrees or more in step S13, “phase shift amount P3”, “isolation amount ISO3”, and “isolation amount improvement amount ΔISO” are obtained for all phase correction cables. They are stored in the database 5 in association with each other. The determination unit 6 reads out “phase shift amount P3” and “isolation amount improvement amount ΔISO” having the maximum isolation amount ISO3 from the database 5. Then, the determination unit 6 outputs the read “phase shift amount P3” and “isolation amount improvement amount ΔISO”. A phase correction cable having a cable length corresponding to the output “phase shift amount P3” is used as the phase correction cable C in FIG.

  As described above, according to the present embodiment, in the FDD direct repeater repeater apparatus, both the transmission and reception phases are adjusted with the same phase correction cable in order to improve the isolation between the service antenna and the donor antenna. In this case, it is possible to determine how much cable length of the phase correction cable should be used.

As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the specific structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.
For example, a target value for the isolation amount may be set for each of the transmission band and the reception band in accordance with the priorities of the transmission band and the reception band. In addition, when comparing the measured value ISO1 of the reception band and the measured value ISO2 of the transmission band isolation, weighting is separately performed for the reception band and the transmission band, and the amount of improvement in the isolation of the reception band A difference may be made between the amount of improvement in isolation of the transmission band. As a result, it is possible to improve the isolation according to the operating conditions of the transmission band and the reception band.

Also, by recording a program for realizing each step shown in FIGS. 3 and 4 on a computer-readable recording medium, and causing the computer system to read and execute the program recorded on the recording medium, Adjustment adjustment processing may be performed. Here, the “computer system” may include an OS and hardware such as peripheral devices.
“Computer-readable recording medium” refers to a flexible disk, a magneto-optical disk, a ROM, a writable nonvolatile memory such as a flash memory, a portable medium such as a DVD (Digital Versatile Disk), and a built-in computer system. A storage device such as a hard disk.

Further, the “computer-readable recording medium” means a volatile memory (for example, DRAM (Dynamic DRAM) in a computer system that becomes a server or a client when a program is transmitted through a network such as the Internet or a communication line such as a telephone line. Random Access Memory)), etc., which hold programs for a certain period of time.
The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 1 ... Isolation adjustment apparatus, 2 ... Variable phase shifter, 3 ... Control part, 4 ... Network analyzer, 5 ... Database, 6 ... Determination part, 10 ... FDD direct relay type repeater apparatus, 11 ... Donor antenna, 12 ... Service antenna, 13, 14 ... 2 distributor, C ... Phase correction cable

Claims (6)

In the FDD direct repeater repeater device, when adjusting both the transmission and reception phases with the same phase correction cable in order to improve the isolation between the service antenna and the donor antenna, the isolation for determining the phase correction cable is performed. Adjustment device,
A first database for storing phase shift data for each of a plurality of phase correction cables having different cable lengths;
A reception band measurement value and a transmission band measurement value for the isolation amount between the service antenna and the donor antenna are stored for each phase shift amount with respect to the reception band and the transmission band of the direct relay repeater device. 2 databases,
A determination unit that determines the phase correction cable that maximizes the isolation amount in the reception band and the transmission band of the direct repeater device based on the measurement value of the isolation amount corresponding to the phase shift amount of the phase correction cable. When,
An isolation adjustment device comprising: The determination unit selects the phase correction cable having the maximum isolation amount by using the smaller one of the measured values of the isolation amount corresponding to the phase shift amount of the phase correction cable as the isolation amount of the phase correction cable. To
The isolation adjustment device according to claim 1, wherein: The determination unit weights the reception band and the transmission band separately when comparing the measurement value of the isolation amount of the reception band and the measurement value of the isolation amount of the transmission band;
The isolation adjustment device according to claim 2, wherein A variable phase shifter that changes a phase of a signal between the service antenna and the donor antenna;
A network analyzer that measures the amount of isolation between the service antenna and the donor antenna;
The phase shift amount is instructed to the variable phase shifter, the measurement value of the isolation amount corresponding to the instructed phase shift amount is received from the network analyzer, and the data of the set of the phase shift amount and the measurement value of the isolation amount is received. A control unit for recording in the second database;
The isolation adjusting device according to any one of claims 1 to 3, further comprising: A determination unit that determines a phase correction cable when adjusting both transmission and reception phases with the same phase correction cable in order to improve isolation between a service antenna and a donor antenna in an FDD direct repeater repeater device When,
A first database for storing phase shift data for each of a plurality of phase correction cables having different cable lengths;
A reception band measurement value and a transmission band measurement value for the isolation amount between the service antenna and the donor antenna are stored for each phase shift amount with respect to the reception band and the transmission band of the direct relay repeater device. 2 databases,
A phase correction cable that maximizes the amount of isolation in the reception band and transmission band of the direct repeater device based on the measurement value of the isolation amount corresponding to the phase shift amount of the phase correction cable. Determine
An isolation adjustment method characterized by that. In the FDD direct repeater repeater device, when adjusting both the transmission and reception phases with the same phase correction cable in order to improve the isolation between the service antenna and the donor antenna, the isolation for determining the phase correction cable is performed. A computer program for performing adjustment processing,
The first database stores phase shift amount data for each of a plurality of phase correction cables having different cable lengths.
The second database stores the measurement values of the reception band and the transmission band of the isolation amount between the service antenna and the donor antenna for each phase shift amount with respect to the reception band and the transmission band of the direct relay repeater device. Store values and
Determining a phase correction cable that maximizes the isolation amount in the reception band and the transmission band of the direct repeater device based on the measurement value of the isolation amount corresponding to the phase shift amount of the phase correction cable; A computer program for causing a computer to execute.

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