JP2002141845A - Directional antenna system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the directivity of a plurality of antenna elements toward a desired wave direction, where a terminal station to next communicate with is located, in a short time and further to attain miniaturization of a system. SOLUTION: This system is provided with first and second weighting means 15 and 16 which are connected to a plurality of antenna elements 11a-11n, and weighting the phase and amplitude of respective signals received by these antenna elements, adding means 21 and 19 which are connected to these weighting processing means, respectively and adds weighted signals, a arriving wave direction detecting part 20 detecting an arriving wave direction from the output of the adding means 19 and a control part 17 setting a weighting coefficient to the first weighting processing means 15 by making a weighting coefficient calculating part 18 calculate the weighting coefficient of the amplitude and the phase on the basis of the information of the arriving wave direction from the arriving wave direction detecting part, the weighting coefficient for forming a pattern for detecting the arriving wave direction is set to the second weighting processing means 16, and the direction of an arriving wave including a desired wave or undesired wave is detected by the arriving wave direction detecting part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a directional antenna device used for a base station in, for example, a radio communication system for performing data communication between a base station and a plurality of slave stations.

[0002]

2. Description of the Related Art In wireless communication systems such as mobile communication, effective use of frequency, measures against multipath fading,
There is an adaptive array antenna as an antenna for removing co-channel interference waves. For example, JP-A-11-
Japanese Patent Application Publication No. 215049 describes an arrangement in which an adaptive array antenna device, which is a directional antenna device, is installed in a base station for communication between a base station and a terminal station.

As shown in FIG. 25, the adaptive array antenna apparatus disclosed in this publication has a mobile station 3 provided with a communication signal transmitting means 1 and a control signal transmitting means 2 as compared with a base station 4.
Is provided with an array antenna 5, a frequency conversion means 6, a control signal band-pass filter 7, an arrival direction estimating means 8, and an antenna directivity control means 9, so that the radio wave from the mobile station 3 is received by the array antenna 5. I have.

In this adaptive array antenna apparatus, the base station 4 receives a low transmission rate control signal from the mobile station 3 with the array antenna 5 having a wide directivity pattern, estimates the direction of arrival, and determines the direction of arrival. By controlling the array antenna to form a sharp directional pattern,
The reception sensitivity of both the base station 4 and the mobile unit 3 can be improved. Also, in this publication, the mobile unit 3
An example is also described in which an array antenna for estimating the direction is prepared separately from an array antenna for transmitting and receiving to and from a mobile object.

[0005]

According to this publication, the base station 4 first forms a wide directivity pattern using an array antenna 5 and determines the direction of the mobile unit 3 from a control signal sent from the mobile unit 3. After the estimation, the array antenna 5 is controlled in that direction to form a sharp directivity pattern. Therefore, a wide directivity pattern for estimating the direction of the moving body 3 and communication with the moving body 3 are required. It takes time from the switching of the sharp directivity pattern to the stabilization, and when a new moving body 3 is detected and communication is performed, the direction of the moving body 3 is estimated by switching to a wider directivity again. It is necessary to switch to a directivity pattern that is sharp in the direction of the moving body 3. Moreover, during communication with the mobile unit 3, the direction of the mobile unit 3 cannot be estimated,
Conversely, there is a problem that communication with the mobile unit 3 cannot be performed while the direction of the mobile unit 3 is being estimated.

Further, in the case of a configuration in which an array antenna for estimating the direction of the moving body 3 is separately prepared, there is a problem that the number of antennas increases and the apparatus becomes large.

Therefore, according to the invention described in each claim, a weighting coefficient for directivity control for a next communication partner can be calculated during reception, transmission, or transmission / reception communication. The present invention provides a directional antenna device capable of performing control for directing the directivity of a plurality of antenna elements in a desired wave direction in a short time in a terminal station that communicates with the terminal station and reducing the size of the device.

[0008]

According to the first aspect of the present invention,
In a directional antenna device that controls directivity using a plurality of antenna elements, two weighting means connected to each antenna element and weighting the phase and amplitude of each signal received by these antenna elements, Two adding means connected to the weighting means and adding the weighted signals, a detecting means for detecting an incoming wave direction from an output of one of the two adding means, and a weighting coefficient for each weighting means. Setting means for setting a weighting coefficient for forming a directional pattern for detecting an incoming wave direction in one of the weighting means, and an incoming wave detected by the detecting means in the other. A weighting coefficient is calculated and set from the direction, and the detecting means sets a weighting coefficient for forming a directional pattern for detecting an incoming wave direction. And it is to detect the direction of arrival from the output of the connected summing means to the weighting means.

According to a second aspect of the present invention, there is provided a directional antenna device for controlling directivity using a plurality of antenna elements, the phase and amplitude weighting of each signal connected to each antenna element and received by these antenna elements. Weighting means, and two addition means respectively connected to the two weighting means for adding the weighted signals, and detecting the incoming wave direction from the output of one of the two addition means. Detecting means, setting means for setting a weighting coefficient for each weighting means, signal generating means for generating a signal for detecting a desired wave direction, and in-phase distribution of a signal from the signal generating means to each antenna element Setting means, wherein one of the weighting means has a weighting function for forming a directional pattern for detecting an incoming wave direction. Set, the other set by calculating the weighting coefficients from DOA the detection means detects,
The signal in-phase distributed by the in-phase distribution means is supplied to each antenna element via weighting means which sets a weighting coefficient for forming a directional pattern for detecting the direction of the incoming wave, and the direction of the incoming wave is detected by the detecting means. An object of the present invention is to detect a direction of an incoming wave from an output of an adding unit connected to a weighting unit that sets a weighting coefficient for forming a directivity pattern to be detected.

According to a third aspect of the present invention, there is provided a directional antenna device for controlling directivity using a plurality of antenna elements, the phase and amplitude weighting of each signal connected to each antenna element and received by these antenna elements. Weighting means, and two addition means respectively connected to the two weighting means for adding the weighted signals, and detecting the incoming wave direction from the output of one of the two addition means. Detecting means, and setting means for setting a weighting coefficient for each weighting means, wherein the detecting means is connected to the weighting means for setting a weighting coefficient for forming a directional pattern for detecting an incoming wave direction. Means for detecting an incoming wave direction from an output of the means, the setting means includes a table, and a weighting function calculated from the incoming wave direction detected by the detecting means; Is stored in a table, a weighting coefficient for forming a directional pattern for detecting the direction of the incoming wave is set in one of the weighting means, and the incoming wave direction detected by the detecting means is detected in the other. If the direction is the direction, read out the corresponding weighting coefficient from the table and set it.If the direction is different from the already detected arriving wave direction, calculate a new weighting coefficient and additionally store it in the table and set the calculated weighting coefficient. It is in.

According to a fourth aspect of the present invention, there is provided a directional antenna device for controlling directivity using a plurality of antenna elements, the phase and amplitude weighting of each signal connected to each antenna element and received by these antenna elements. Weighting means, and two addition means respectively connected to the two weighting means for adding the weighted signals, and detecting the incoming wave direction from the output of one of the two addition means. Detecting means, and setting means for setting a weighting coefficient for each weighting means, wherein the detecting means is connected to the weighting means for setting a weighting coefficient for forming a directional pattern for detecting an incoming wave direction. Means for detecting an incoming wave direction from an output of the means, the setting means includes a table, and a weighting function calculated from the incoming wave direction detected by the detecting means; Advance table is stored, to set the weighting factor for forming a directivity pattern for detecting the direction of arrival for one of each weighting means,
The other is to read and set the corresponding weighting coefficient from the table based on the incoming wave direction detected by the detecting means.

According to a fifth aspect of the present invention, there is provided a directional antenna device for controlling directivity using a plurality of antenna elements, the phase and amplitude weighting of each signal connected to each antenna element and received by these antenna elements. Two weighting means, and two adding means respectively connected to the two weighting means, for adding the weighted signals, and a detecting means for detecting the incoming wave direction from the output of the two adding means, Setting means for setting a weighting coefficient for each weighting means, and selecting means for selectively extracting an output of each adding means, wherein the setting means sets a directional pattern for detecting an incoming wave direction to one of the weighting means. When the weighting coefficient for forming is set, the other side calculates and sets the weighting coefficient from the direction of the incoming wave detected by the detecting means, and sets each weighting coefficient. When a weighting coefficient for forming a directional pattern for detecting an incoming wave direction is set in the other of the stages, a weighting coefficient is calculated and set in one of the stages from the incoming wave direction detected by the detecting means. The direction of the incoming wave is detected from the output of the adding means connected to the weighting means for setting the weighting coefficient for forming the directivity pattern for detecting the direction, and the selecting means selects the weighting coefficient from the direction of the incoming wave detected by the detecting means. Is calculated and the output of the adding means connected to the weighting means set is selected.

According to a sixth aspect of the present invention, there is provided a directional antenna device for controlling directivity by using a plurality of antenna elements, wherein in-phase distribution means for in-phase distributing a transmission signal to each antenna element, and connected to each antenna element. First weighting means for weighting the phase and amplitude of each signal in-phase distributed by the in-phase distribution means, and weighting the phase and amplitude of each signal received by these antenna elements, connected to each antenna element; A second weighting means, an adding means connected to the second weighting means for adding the weighted signals, a detecting means for detecting an incoming wave direction from an output of the adding means, and a weighting means. Setting means for setting a weighting coefficient, wherein the setting means assigns weights to the second weighting means for forming a directional pattern for detecting an incoming wave direction. Set the number, the first weighting unit in that the detecting means sets by calculating the weighting coefficients from the incoming wave direction detected.

According to a seventh aspect of the present invention, in a directional antenna apparatus for controlling directivity using a plurality of antenna elements, a first in-phase distribution means for in-phase distributing a transmission signal to each antenna element, First weighting means for weighting the phase and amplitude of each signal in-phase distributed by the first in-phase distribution means, and phase of each signal received by these antenna elements connected to each antenna element A second weighting means for weighting the amplitude and amplitude, an adding means connected to the second weighting means for adding the weighted signals, and a detecting means for detecting an incoming wave direction from an output of the adding means. Setting means for setting a weighting coefficient for each weighting means, signal generating means for generating a signal for detecting a desired wave, and a signal from the signal generating means Second in-phase distribution means for in-phase distribution to the element, wherein the setting means sets a weighting coefficient for forming a directivity pattern for detecting an incoming wave direction in the second weighting means, The weighting means calculates and sets a weighting coefficient from the direction of the incoming wave detected by the detection means, and supplies the signal in-phase distributed by the second in-phase distribution means to each antenna element via the second weighting means. And detecting the incoming wave direction from the output of the adding means by the detecting means.

According to an eighth aspect of the present invention, there is provided a directional antenna device for controlling directivity using a plurality of antenna elements, wherein in-phase distribution means for in-phase distributing a transmission signal to each antenna element, and connected to each antenna element; First weighting means for weighting the phase and amplitude of each signal in-phase distributed by the in-phase distribution means, and weighting the phase and amplitude of each signal received by these antenna elements, connected to each antenna element; A second weighting means, an adding means connected to the second weighting means for adding the weighted signals, a detecting means for detecting an incoming wave direction from an output of the adding means, and a weighting means. Setting means for setting a weighting coefficient, the setting means includes a table, and the weighting coefficient calculated from the incoming wave direction detected by the detecting means is stored in the table. The weighting coefficient for forming the directivity pattern for detecting the direction of the incoming wave is set in the second weighting means, and the incoming wave direction detected by the detecting means is set in the first weighting means. If it is the wave direction, the corresponding weighting coefficient is read from the table and set, and if it is different from the already detected incoming wave direction, a new weighting coefficient is calculated and additionally stored in the table, and the calculated weighting coefficient is set. It is in.

According to a ninth aspect of the present invention, in a directional antenna apparatus for controlling directivity using a plurality of antenna elements, an in-phase distribution means for in-phase distribution of a transmission signal to each antenna element, and connected to each antenna element, First weighting means for weighting the phase and amplitude of each signal in-phase distributed by the in-phase distribution means, and weighting the phase and amplitude of each signal received by these antenna elements, connected to each antenna element; A second weighting means, an adding means connected to the second weighting means for adding the weighted signals, a detecting means for detecting an incoming wave direction from an output of the adding means, and a weighting means. Setting means for setting a weighting coefficient, wherein the setting means includes a table, and stores in advance a weighting coefficient calculated from the arriving wave direction detected by the detecting means. The weighting coefficient for forming the directivity pattern for detecting the direction of the incoming wave is set in the second weighting means, and the weighting coefficient is set in the first weighting means based on the direction of the incoming wave detected by the detecting means. A corresponding weighting coefficient is read from the table and set.

According to a tenth aspect of the present invention, in a directional antenna apparatus for controlling directivity using a plurality of antenna elements, two in-phase distribution means for in-phase distribution of a transmission signal to each antenna element, and connection to each antenna element And two weighting means respectively connected to the respective in-phase distribution means for weighting the phase and amplitude of each signal in-phase distributed by the respective in-phase distribution means, and connected to the respective weighting means and weighted. Selective means for two adding means for adding each signal, detecting means for detecting an incoming wave direction from outputs of the two adding means, setting means for setting weighting coefficients for each weighting means, and each in-phase distribution means Selecting means for supplying a transmission signal to the transmitting means, and setting means for forming a directional pattern for detecting an incoming wave direction in one of the weighting means. When the weighting coefficient is set, the weighting coefficient is calculated and set on the other side from the direction of the incoming wave detected by the detecting means, and the weighting coefficient for forming a directional pattern for detecting the direction of the incoming wave is set on the other side of each weighting means. Then, the weighting coefficient is calculated and set on one side from the arriving wave direction detected by the detecting means, and the detecting means is connected to the weighing means which sets the weighting coefficient for forming a directional pattern for detecting the arriving wave direction. Detecting the arriving wave direction from the output of the adding means, and selecting a weighing coefficient from the arriving wave direction detected by the detecting means to supply a transmission signal to the in-phase distribution means connected to the weighting means set by the weighting coefficient. is there.

An eleventh aspect of the present invention is directed to a directional antenna apparatus for controlling directivity using a plurality of antenna elements, an antenna sharing means for transmitting and receiving and sharing each antenna element, and a switch for switching between transmission and reception. Means, in-phase distribution means for distributing a transmission signal in-phase to each antenna element, and weighting of the phase and amplitude of each signal which is connected to the antenna sharing means and connected to the in-phase distribution means and distributed in-phase by the in-phase distribution means. And a first weighting means for weighting the phase and amplitude of each signal received by each antenna element, and a second weighting means for weighting the phase and amplitude of each signal received by each antenna element connected to the antenna sharing means. No. 2 weighting means, a first weighting means connected to the first weighting means for adding the weighted signals, and a second weighting means. Second adding means for adding the weighted signals, detecting means for detecting the direction of the incoming wave from the output of the second adding means, and setting means for setting a weighting coefficient for each weighting means. Setting means sets a weighting coefficient for forming a directional pattern for detecting an incoming wave direction in the second weighting means;
The weighting means calculates and sets a weighting coefficient from the direction of the incoming wave detected by the detection means, and the switching means supplies the transmission signal to the in-phase distribution means at the time of transmission, and takes in the reception signal from the first addition means at the time of reception. It is in.

According to a twelfth aspect of the present invention, in a directional antenna apparatus for controlling directivity using a plurality of antenna elements, an antenna sharing means for transmitting and receiving and sharing each antenna element, and a switch for switching between transmission and reception Means, in-phase distribution means for distributing a transmission signal in-phase to each antenna element, and weighting of the phase and amplitude of each signal which is connected to the antenna sharing means and connected to the in-phase distribution means and distributed in-phase by the in-phase distribution means. And a first weighting means for weighting the phase and amplitude of each signal received by each antenna element, and a second weighting means for weighting the phase and amplitude of each signal received by each antenna element connected to the antenna sharing means. No. 2 weighting means, a first weighting means connected to the first weighting means for adding the weighted signals, and a second weighting means. Second adding means for adding the weighted signals, detecting means for detecting the direction of the incoming wave from the output of the second adding means, and setting means for setting a weighting coefficient for each weighting means. The setting means includes a table, the weighting coefficient calculated from the arriving wave direction detected by the detecting means is stored in the table, and the second weighting means is weighted to form a directional pattern for detecting the arriving wave direction. If the arriving wave direction detected by the detecting means is the already detected arriving wave direction, the corresponding weighting coefficient is read from the table and set in the first weighting means, and is different from the already detected arriving wave direction. If so, a new weighting factor is calculated and stored in the table, and the calculated weighting factor is set.
The switching means supplies a transmission signal to the in-phase distribution means at the time of transmission, and takes in the reception signal from the first adding means at the time of reception.

According to a thirteenth aspect of the present invention, there is provided a directional antenna device for controlling directivity using a plurality of antenna elements, an antenna sharing means for transmitting and receiving and sharing each antenna element, and a switch for switching between transmission and reception. Means, in-phase distribution means for distributing a transmission signal in-phase to each antenna element, and weighting of the phase and amplitude of each signal which is connected to the antenna sharing means and connected to the in-phase distribution means and distributed in-phase by the in-phase distribution means. And a first weighting means for weighting the phase and amplitude of each signal received by each antenna element, and a second weighting means for weighting the phase and amplitude of each signal received by each antenna element connected to the antenna sharing means. No. 2 weighting means, a first weighting means connected to the first weighting means for adding the weighted signals, and a second weighting means. Second adding means for adding the weighted signals, detecting means for detecting the direction of the incoming wave from the output of the second adding means, and setting means for setting a weighting coefficient for each weighting means. The setting means includes a table, the weighting coefficient calculated from the incoming wave direction detected by the detecting means is stored in a table in advance, and the second weighting means forms a directional pattern for detecting the incoming wave direction. A first weighting means for reading out and setting a corresponding weighting coefficient from a table based on an incoming wave direction detected by the detection means, and a switching means for transmitting a transmission signal in-phase distribution means at the time of transmission. And receiving the received signal from the first adding means during reception.

According to a fourteenth aspect of the present invention, there is provided a directional antenna apparatus for controlling directivity using a plurality of antenna elements, an antenna sharing means for transmitting and receiving and sharing each antenna element, and a switch for switching between transmission and reception. Means, two in-phase distribution means for distributing a transmission signal in-phase to each antenna element, and connected to the antenna sharing means and connected to each in-phase distribution means, respectively, for each signal in-phase distributed by each in-phase distribution means. Two weighting means for weighting the phase and the amplitude, respectively, and for weighting the phase and the amplitude of each signal received by each antenna element, respectively, and respectively connected to the two weighting means, and adding the weighted signals. The two adding means, the detecting means for detecting the direction of the incoming wave from the outputs of the two adding means, and the respective weighting means Setting means for setting the weighting coefficient, and selecting means for selectively supplying a transmission signal to each in-phase distribution means and selectively extracting the output of each adding means, wherein the setting means is provided on one of the weighting means. When a weighting coefficient for forming a directional pattern for detecting an incoming wave direction is set, a weighting coefficient is calculated and set from the incoming wave direction detected by the detecting means on the other side, and the incoming wave direction is set on the other side of each weighting means. When a weighting coefficient for forming a directional pattern to be detected is set, a weighting coefficient is calculated and set on the one hand from the arriving wave direction detected by the detecting means, and the detecting means sets a directional pattern for detecting the arriving wave direction. The direction of the incoming wave is detected from the output of the adding means connected to the weighting means for setting the weighting coefficient to be formed. A weighting coefficient is calculated from the detected incoming wave direction and a transmission signal is supplied to the in-phase distribution means connected to the weighting means set. Upon reception, the weighting coefficient is calculated and calculated based on the incoming wave direction detected by the detecting means. The receiving signal is taken in from the adding means connected to the means.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) In this embodiment, an example of a directional antenna device having a receiving system for receiving a signal and sending the signal to a demodulation unit will be described.

As shown in FIG. 1, the directional antenna device has a plurality of antenna elements 1 constituting an array antenna.
1a to 11n, and each of the antenna elements 11a to 11n
n to the low noise amplifier (LN
A) After amplification by 12a to 12n, the frequency is converted to a lower frequency band by frequency converters 13a to 13n, respectively. Here, the reason why the frequency is converted to a low frequency and processed is that sensitivity, selectivity, and stability increase.

Each received signal is transmitted to each of the frequency converters 13a to 13a.
After the frequency conversion at 13n, the A / D converters 14a to 14a
14n, each of which is converted into a digital signal, and the plurality of converted digital signals are sent to a first weighting processing means A15 and a second weighting processing means B16 which constitute weighting means.

The first weighting means A15 is provided with amplitude and phase weighting sections 15a to 15n for weighting each digital signal with amplitude and phase, respectively, and the second weighting means B16 is provided with each digital signal. Are provided with amplitude and phase weighting sections 16a to 16n for weighting the amplitude and the phase, respectively.

A control unit 17 is provided.
In step 7, the weighting coefficient calculation unit 18 is controlled to cause the weighting coefficient calculation unit 18 to calculate a weighting coefficient for amplitude and phase for detecting the direction of an unnecessary wave such as a desired wave, an interference wave, or an interfering wave which is an incoming wave. The calculated weighting coefficient is set in each of the weighting units 16a to 16n of the second weighting processing means B16. In addition, the control unit 17 and the weighting coefficient calculating unit 18 are provided with the respective weighting processing units 15,
A setting means for setting a weighting coefficient to 16 is formed.

The signals weighted in amplitude and phase by the weighting sections 16a to 16n of the second weighting processing means B16 are added by the adding means 19 and then supplied to the incoming wave direction detecting section 20. . The direction-of-arrival-wave detection unit 20 detects the direction of a desired wave from a terminal that desires communication and the direction of an unnecessary wave such as an interference wave or an interference wave from the transmitted signal.

When the arriving wave direction detecting section 20 detects the arriving wave direction, the control section 17 causes the weighing coefficient calculating section 18 to calculate a weighing coefficient based on this information, and divides the calculated weighing coefficient into the first weighting coefficient. Weighting means A15
Are set in each of the weighting units 15a to 15n.

The signals weighted in amplitude and phase by the weighting units 15a to 15n of the first weighting processing unit A15 are added by the addition unit 21 and then supplied to the demodulation unit as a reception signal.

The weighting means 15, 16
Weighting sections 15a to 15n, 16a to
16n, the control unit 17, the weighting coefficient calculation unit 18, each of the adding units 19 and 21, and the arrival wave direction detection unit 20 are realized by digital signal processing.

FIG. 2 shows a radio communication system composed of a base station provided with the directional antenna device 30 and terminal stations 31 and 32. First, the control unit 17 controls the weighting coefficient calculation unit 18 so that the arrival wave direction detection unit 20 detects a desired wave direction from a communication desired terminal station or an unnecessary wave direction such as an interference wave or an interference wave. The amplitude and phase weighting coefficients of the amplitude and phase weighting units 16a to 16n of the second weighting means B16 are sequentially updated, and the directivity pattern B is scanned while changing its direction from -90 ° to 90 °.

Then, the incoming wave direction detector 20 detects the strength of the received power from the direction in which the directivity pattern is directed, and determines that there is an incoming wave from the direction in which the received power is higher. However, it is determined that there is no incoming wave from the direction in which the received power is weak. Further, when it is determined that the incoming wave is an incoming signal, if the incoming wave has an identification signal from a terminal, the incoming wave is determined to be a desired wave; otherwise, it is determined to be an unnecessary wave such as an interference wave or an interfering wave.

As a result of such scanning, the direction-of-arrival-wave detecting unit 20 determines the direction of the terminal station 31 which desires communication at the point C in the direction of -30 ° with respect to the base station and the direction of 45 ° with respect to the base station.
The direction of the terminal 32 that desires communication at the point D in the direction and the unnecessary wave direction from the point X in the −45 ° direction with respect to the base station are detected.

Thus, when the direction of the incoming wave has been detected,
Next, the operation of receiving signals from the terminal stations 31 and 32 is started. In this receiving operation, first, in order to receive a signal from the terminal station 31, a desired directivity pattern A in which directivity is oriented in the direction of the point C and null points are oriented in the directions of the X and D points. The control unit 17 causes the weighting coefficient calculation unit 18 to calculate the obtained weighting coefficients, and calculates the calculated weighting coefficients in each weighting unit 1 of the first weighting processing unit A15.
Set to 5a to 15n.

Thus, the first weighting means A15 weights the amplitude and phase of the signals received by the plurality of antenna elements 11a to 11n. Then, a signal is received from the terminal station 31. While receiving the signal from the terminal station 31, the weighting coefficient calculating unit 1
8 shows that a desired directivity pattern C is obtained in which the directivity is oriented in the direction of the point D and the null points are oriented in the directions of the X and C in order to receive the signal from the terminal station 32. To be calculated.

After completion of the reception from the terminal station 31, each of the weighting units 15a to 15a of the first weighting processing means A15
5n is set with a weighting coefficient for receiving the signal from the terminal station 32, which has already been calculated by the weighting coefficient calculation unit 18, and the reception of the signal from the terminal station 32 is started.

The control section 17 periodically scans the directivity pattern by the second weighting means B16, and detects the moving direction of the terminal station if it is moving. The weighting coefficient calculating unit 18 calculates a weighting coefficient constituting an optimal directivity pattern, and updates the weighting coefficient set in the first weighting processing unit A15.

Further, for example, when an unnecessary wave is newly detected from the point Y during reception from the terminal station 31, the directivity is directed to the point C by the weighting coefficient calculation unit 18, A weighting coefficient constituting a desired directivity pattern in which a null point is directed in the X point direction, the D point direction, and the Y point direction is calculated, and the weighting coefficient of the first weighting processing unit A15 is updated.

In this embodiment, the processes of the first weighting means A15 and the second weighting means B16 are realized by digital signal processing, but the present invention is not limited to this. For example, a plurality of antenna elements 11a
The radio waves received by the low noise amplifier 1
After amplification in 2a to 12n, the first weighting processing means A
15 and the second weighting means B16 to perform weighting processing by analog signal processing. Then, the analog signals from the respective weighting means 15 and 16 are added by the adding functions 21 and 19, respectively, and the added analog signal from the first weighting means A15 is frequency-converted to a lower frequency band. After that, the digital signal is converted into a digital signal by A / D conversion and then sent to the demodulation unit. The added analog signal from the second weighting processing unit B16 is supplied to the arrival wave direction detection unit 20 to change the arrival wave direction. What is detected may be used.

FIG. 3 is a flowchart showing a control sequence according to this embodiment. First, the processing of B101 to B106 is performed using the second weighting means B16. That is,
When the detection of the direction of the incoming wave is started, in B102, the weighting factor calculating unit 18 calculates the weighting factor of the amplitude and the phase forming the directivity pattern oriented in the -90 ° direction, for example, in order to detect the direction of the incoming wave. Then, in B103, a weighting coefficient is set in the second weighting processing means B16. Then, the arrival wave direction detection unit 20 detects an unnecessary wave direction in B104, and detects a direction of a communication desired terminal station in B105. In B106, it is determined whether the scanning of the directivity pattern, for example, the scanning from −90 ° to 90 ° is completed. If the scanning has not been completed, the process returns to B102, and the amplitude and phase weighting factors for forming the directivity pattern oriented in, for example, the -85 ° direction are calculated.
Then, the weighting coefficient is set in the second weighting means B16, and the unnecessary wave direction is detected in B104, and the direction of the terminal station desiring to communicate is detected in B105. This is repeated until the scanning of the directivity pattern is completed.

When the direction of the communication desired terminal station is detected, next, the processing of A101 to A111 is performed using the first weighting processing means A15. That is, when the incoming wave direction detecting unit 20 detects a communication-desired terminal station, A1
At 02, it is checked whether or not the weighting coefficient has been calculated by the weighting coefficient calculation unit 18;
At 04, the calculated weighting coefficient is set in the first weighting means A15. If you haven't done so already, A1
At 03, the weighting factor calculation unit 18 determines a weighting factor that forms a desired directivity pattern such that the directivity is oriented in the direction of the communication desired terminal station and the null point is oriented in the unnecessary wave direction, In A104, the calculated weighting coefficient is set in the first weighting means A15.

When the setting of the weighting coefficient is completed, reception is started at A105. During reception, A1
At 06, it is checked whether the direction of the incoming wave has changed,
If the incoming wave direction detector 20 detects that the direction of the incoming wave has changed during reception from the terminal station, the weighting coefficient calculator 18 calculates the weighting coefficient in A107. Is re-calculated and recalculated, and a new weighting coefficient is set in the first weighting processing means A15 in A108.

If the incoming wave direction detecting unit 20 detects the next terminal station that desires communication during reception from the terminal station, the signal from the terminal station is transmitted in A111. Amplitude and phase weighting factors constituting an optimal directivity pattern for reception are calculated in advance. When the reception from the previous terminal station is completed, the new weighting coefficient calculated for the next communication desired terminal station is set in the first weight processing means A15 and the reception is started.

As described above, according to the present embodiment, it is possible to detect the direction of an incoming wave even during reception from a terminal station, and to detect that the direction of the incoming wave has changed. In this case, the weighting coefficient can be recalculated by the weighting coefficient calculation unit 18 and the weighting coefficient can be reset in the first weighting unit A15.

If a next desired terminal station is detected during reception from the terminal station, an optimum directivity pattern for receiving a signal from the terminal station is formed. The amplitude and phase weighting coefficients to be calculated are calculated, and immediately after the reception from the previous terminal station is completed, the new weighting coefficients calculated for the next terminal station are set in the first weighting processing means A15. Reception can be started, and switching of directivity control to a terminal station that desires communication next can be performed in a short time.

Moreover, only one set of array antennas may be used, and the size of the apparatus can be reduced. In this embodiment, the directivity pattern is configured to detect the direction of the incoming wave and is scanned. However, the present invention is not limited to this. A sex pattern may be configured. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Second Embodiment) This embodiment also describes an example of a directional antenna device having a receiving system for receiving a signal and sending the signal to a demodulation unit. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described.

As shown in FIG. 4, the directional antenna device has each antenna element 11a constituting an array antenna.
To 11n are connected to the common antenna units 22a to 22n, and the low noise amplifier 1 is connected to the common antenna units 22a to 22n.
Input terminals 2a to 12n are connected and output terminals of power amplifiers (PA) 23a to 23n are connected.

A signal for detecting a desired wave direction,
For example, a desired wave direction detection signal generation unit 24 for generating an inquiry signal to the terminal station is provided. The desired wave direction detection signal generation unit 24 is controlled by the control unit 171 to supply the signal to the in-phase distribution unit 25. ing. In-phase distribution means 25
Are configured to distribute the signal from the desired wave direction detection signal generation unit 24 to the antenna elements 11a to 11n in the same phase. The in-phase distribution unit 25 is also realized by digital signal processing, similarly to the addition units 19 and 21.

Each signal from the in-phase distribution means 25 is
Are weighted by the amplitude and phase weighting units 16a to 16n of the weighting means B16, and then converted into analog signals by the D / A converters 26a to 26n, and subsequently, the frequency converters 27a to 27n Is converted into a signal of a radio frequency by the power amplifiers 23a to 23n, and then supplied to the antenna elements 11a to 11n via the antenna sharing units 22a to 22n. I have. The other configuration is the same as that of the first embodiment.

In the directional antenna apparatus, first, a signal is supplied from the desired wave direction detection signal generation unit 24 to the in-phase distribution unit 25 to perform in-phase distribution.
After weighting the amplitude and phase by the amplitude and phase weighting units 16a to 16n of the weighting means B16, the signals are converted into analog signals by the D / A converters 26a to 26n. Then, the signals are converted into radio frequency signals by the frequency converters 27a to 27n, and further power-amplified by the power amplifiers 23a to 23n.
11n.

For example, the second weighting processing means B16
Is a phase and amplitude weighting coefficient that directs the directivity pattern in the −90 ° direction at first.
The phase and the amplitude are weighted for every 11n, and the desired wave direction detection signal is transmitted. Then, the directional antenna device that has transmitted the signal for detecting the desired wave direction performs reception using the second weighting processing unit B16. The arriving wave direction detection unit 20 detects the strength of the received power in the −90 ° direction, and if the received power is strong, determines that there is an incoming wave, and
If the received power is weak, it is determined that there is no incoming wave. further,
If it is determined that there is an incoming wave, and if the received signal is a response signal from the terminal station to the desired wave direction detection signal, it is determined to be a desired wave, otherwise it is determined to be an unnecessary wave such as an interference wave or an interference wave. I do.

Next, the weighting coefficient calculating section 18 calculates a weighting coefficient for directing the directivity pattern in, for example, the -85 ° direction, and the amplitude and phase weighting sections 16a to 16n of the second weighting processing means B16. And a signal for detecting a desired wave direction is transmitted from each of the antenna elements 11a to 11n in the same manner. Then, the incoming wave direction detection unit 20
The strength of the received power in this direction is detected, and if the received power is strong, it is determined that there is an incoming wave, and if the received power is weak, it is determined that there is no incoming wave. Further, when it is determined that there is an incoming wave, if the reception is a response signal from the terminal station to the signal for detecting the desired wave direction, it is determined to be a desired wave, otherwise, it is an unnecessary wave such as an interference wave or an interference wave. Judge.

In this way, the directivity pattern becomes -90.
The incoming wave direction detector 2 while scanning the directivity pattern so as to change from the 90 ° direction to the 90 ° direction, for example, by 5 °.
Based on 0, the direction of the incoming wave is detected, and it is determined whether the incoming wave is a desired wave or an unnecessary wave. Thus, in the case shown in FIG. 2, the arriving wave direction detecting unit 20 determines the direction of the terminal station 31 that desires communication at the point C in the −30 ° direction with respect to the base station, as in the above-described embodiment. The direction of the terminal 32 that desires communication at the point D in the 45 ° direction with respect to the station and the direction of the unnecessary wave from the point X in the −45 ° direction with respect to the base station are detected. When the detection of the incoming wave direction is completed, signals from the terminal stations 31 and 32 are received by the directivity control similar to that of the above-described embodiment.

As described above, this directional antenna device
The signal from the desired wave direction detection signal generation unit 24 is sequentially changed in direction, transmitted, and a response signal to the signal is received from the terminal station to detect a terminal station that desires communication. Can be received. In this embodiment, the same operation and effect as those of the first embodiment can be obtained.

In this embodiment, a directional pattern is formed to detect the direction of the incoming wave, and the directional pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Third Embodiment) This embodiment also describes an example of a directional antenna device having a receiving system for receiving a signal and sending the signal to a demodulation unit. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described. As shown in FIG. 5, the directional antenna device is provided with a reference table 28 for storing the phase and amplitude weighting coefficients calculated by the weighting coefficient calculator 18.

In this directional antenna device, radio waves received by the plurality of antenna elements 11a to 11n are amplified by low-noise amplifiers 11a to 11n, respectively, and further frequency-converted to low frequency bands by frequency converters 13a to 13n. . After the frequency conversion, the digital signals are converted into digital signals by the A / D converters 14a to 14n, and the converted digital signals are sent to the first weighting processing means A15 and the second weighting processing means B16. Can be

In the second weighting means B16, the weighting of the amplitude and the phase calculated in advance by the weighting coefficient calculation section 18 and stored in the reference table 28 to form a directivity pattern for detecting the direction of the incoming wave. The coefficients are set in the amplitude and phase weighting units 16a to 16n. Then, the received signals are weighted by the amplitude and phase weighting units 16a to 16a.
After the weighting is performed at 16n, the addition is performed by the adding means 19, and the incoming wave direction detecting unit 20 detects the incoming wave direction. That is, the direction of a desired wave from the terminal station and the direction of an unnecessary wave such as an interference wave or an interference wave are detected.

The control unit 172 uses the detection signal of the incoming wave direction from the incoming wave direction detection unit 20 to calculate the weighting coefficient
The weighting coefficients for the amplitude and phase are calculated and stored in the reference table 28. First weighting means A1
In step 5, the amplitude and phase weighting coefficients are read out from the reference table 28, and the amplitude and phase weighting units 15a to 15
n. As a result, the transmitted digital signals are weighted in amplitude and phase by the respective amplitude and phase weighting units 15a to 15n of the first weighting processing unit A15, and are added by the adding unit 21. It is sent to the demodulation unit.

When a new terminal station and an unnecessary wave are detected by the arriving wave direction detector 20, the controller 172
Causes the weighting coefficient calculation unit 18 to calculate the amplitude and phase weighting coefficients for all combinations of the desired wave direction and the unwanted wave direction including those directions, and additionally store the weighting coefficients in the lookup table 28.

FIG. 6 shows a base station having the directional antenna apparatus 301 and a fixed or semi-fixed terminal station 33 at the point C.
And a fixed or semi-fixed terminal station 34 at a point D.

In the state before the update, the terminal stations 33 and 34 desiring communication are located at the C point in the -30 ° direction and the D point in the 45 ° direction with respect to the base station, and unnecessary waves are transmitted in the −45 ° direction. In this case, weighting coefficients for amplitude and phase are calculated for all combinations of the desired wave direction and the unwanted wave direction, which are the directions of the terminal stations that desire communication, and FIG. As shown in FIG. 7, the information is stored in the memory unit 28a of the lookup table 28.

Therefore, under the condition of the incoming wave, the terminal station 3
When receiving signals from the first and second weighting units A and C, the corresponding weighting coefficients of the amplitude and phase are read from the memory unit 28a of the lookup table 28, and the amplitude and phase weighting units 15a to 15a of the first weighting processing unit A15 are read. 15n to form a desired directivity pattern so that the terminal station 33,
The signal from the receiver 34 is received.

When the arrival wave direction detection unit 20 newly detects an unnecessary wave from the Y point in the 0 ° direction with respect to the base station, the control unit 172 sets the weighting coefficient calculation unit 1
In step 8, weighting coefficients for amplitude and phase are calculated for all combinations of the desired wave direction and the unnecessary wave direction, which are the directions of the terminal stations that desire communication, and are additionally stored in the memory unit 28 b of the lookup table 28. Then, the first weighting means A15
Read out the corresponding amplitude and phase weighting coefficients from the memory section 28b of the lookup table 28 and set them in the respective amplitude and phase weighting sections 15a to 15n so as to form a desired directivity pattern so that the terminal stations 33 and 34 are configured. To receive signals from

Here, the angular resolution of the amplitude and phase weighting coefficients stored in the reference table 28 is set to 15 °, but it is not necessarily limited to this, and even if the angular resolution is finely set by the capacity of the reference table. ,Also,
It may be set roughly.

As described above, the reference table 28 is provided. In this reference table 28, the amplitude and phase weighting factors for forming the directivity pattern for detecting the direction of the incoming wave are stored in advance, and the incoming wave including the desired wave is stored. Calculate and store weighting coefficients of amplitude and phase for all combinations of the desired wave direction and the unwanted wave direction that are the terminal station directions that desire communication by detecting the direction of the incoming wave including the desired wave. Is changed, the amplitude and phase weighting coefficients are calculated for all combinations of the new desired wave direction and unnecessary wave direction and are additionally stored. Therefore, when the same arriving wave is detected, the weighting coefficient is calculated. The corresponding weighting coefficient of the amplitude and the phase is read out from the reference table 28 without causing the calculating unit 18 to perform the calculation, and the first weighting means A1
5 may be set in each of the amplitude and phase weighting units 15a to 15n. Therefore, directivity switching control for a terminal station that desires communication can be performed in a shorter time.

As described above, the same desired wave direction and unnecessary wave direction are calculated once and the amplitude and phase weighting coefficients stored in the reference table 28 are read out and used, so that the wireless LAN or wireless POS is used. This is extremely effective for a fixed or semi-fixed indoor wireless communication system in which a terminal station does not move for a certain period as described above.
In this embodiment, the same operation and effect as those of the first embodiment can be obtained.

In this embodiment, a directional pattern is formed to detect the direction of an incoming wave, and the directional pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Fourth Embodiment) This embodiment also describes an example of a directional antenna device having a receiving system for receiving a signal and sending the signal to a demodulation unit. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described. As shown in FIG. 8, the directional antenna device is provided with a pre-calculation processing unit 29 and a reference table 281 for storing the weighting coefficients calculated by the pre-calculation processing unit 29, instead of the weighting coefficient calculation unit.

In this directional antenna device, radio waves received by a plurality of antenna elements 11a to 11n are amplified by low noise amplifiers 12a to 12n, respectively, and frequency-converted by a plurality of frequency converters 13a to 13n to a lower frequency band. You. After the frequency conversion, the A / D converter 14a
To 14n, and the converted plurality of digital signals are converted into first weighting means A1.
5 and the second weighting means B16.

The second weighting means B16 calculates the arriving wave from the amplitude and phase weighting coefficients stored in the look-up table 281 which are calculated in advance by the pre-calculation processing section 29 in order to detect the direction of the arriving wave. The weighting coefficients constituting the directivity pattern for detecting the direction are read out and set in the amplitude and phase weighting units 16a to 16n. Then, the received signals are weighted by the amplitude and phase weighting units 16a to 16a.
After the weighting is performed at 16n, the addition is performed by the adding means 19, and the incoming wave direction detecting unit 20 detects the incoming wave direction. That is, the mobile station detects the direction of the terminal station and the unnecessary wave direction, which are the desired wave directions, for which communication is desired.

The control unit 173 calculates a phase and amplitude weighting coefficient to be given to each antenna element to the pre-calculation processing unit 29 from the arriving wave direction detected by the arriving wave direction detecting unit 20, that is, the desired wave direction and the unnecessary wave direction. Let reference table 28
1 is stored. This is performed for all combinations of the detected terminal station direction and unnecessary wave direction, and stored in the reference table 281.

Then, when there is a request for communication from the terminal station, based on the arrival wave direction detected by the arrival wave direction detection section 20, the amplitude and phase weighting coefficients stored in the lookup table 281 are detected. A weighting coefficient constituting a desired directivity pattern for performing reception from the terminal station is read out and set in the amplitude and phase weighting units 15a to 15n of the first weighting processing unit A15.

Thus, the plurality of digital signals received from the terminal station and converted into digital signals are weighted by the amplitude and phase weighting sections 15a to 15n of the first weighting processing means A15.
The weighting of the amplitude and the phase is performed by the
, And then sent to the demodulation unit.

FIG. 9 shows a base station having the directional antenna device 302, a fixed or semi-fixed terminal station 33 at the point C in the −30 ° direction and a fixed or semi-fixed terminal station 34 at the point D in the 45 ° direction. FIG.

The look-up table 281 stores amplitude and phase weighting factors for the combination of the terminal station direction and the unnecessary wave direction calculated in advance by the pre-calculation processing unit 29. FIG. 10 shows the phase and amplitude weighting factors given to the antenna elements 11a to 11n when the unwanted wave direction is −45 ° and the desired wave direction is −15 ° to 90 ° every 15 °. The example set in the table 281 is shown.

For example, when the unnecessary wave is coming from the direction of the X point of -45 °, if there is a request for communication from the terminal station 33, the desired wave corresponds to −30 ° and the unnecessary wave corresponds to −45 °. The weighting coefficient is read from the reference table 281, and the amplitude and phase weighting unit 1 of the first weighting processing unit A15 is read out.
Signals are received from the terminal station 33 in such a manner as to set a desired directivity pattern by setting 5a to 15n.

If there is a request for communication from the terminal station 34, the weighting coefficients corresponding to the desired wave = 45 ° and the unnecessary wave = −45 ° are read from the reference table 281 and the respective amplitudes of the first weighting means A15 are read out. And phase weighting unit 15
Signals from the terminal station 34 are received in such a manner that a desired directivity pattern is set by setting a to 15n.

Thus, the pre-calculation processing unit 29 and the look-up table 281 are provided, and the pre-calculation processing unit 29 calculates the amplitude and phase weighting coefficients for constructing the directivity pattern for detecting the incoming wave direction in advance. An incoming wave including a desired wave is detected in advance in the reference table 281, and a weighting coefficient of amplitude and phase for all combinations of the desired wave direction and the unnecessary wave direction which is the terminal station direction is detected by the pre-calculation processing unit 29. Is calculated and stored in the reference table 281. Therefore, when an incoming wave including a desired wave from a terminal station that has already been set is detected, the calculation of the weighting coefficient is not performed and the corresponding The amplitude and phase weighting factors to be read out are read out and the amplitude and phase weighting sections 15a to 15a of the first weighting means A15 are read out.
n may be set. Therefore, directivity switching control for a terminal station that desires communication can be performed in a shorter time.

The reference table 281 is calculated in advance.
Since the amplitude and phase weighting coefficients stored in the memory are read out and used, it is extremely effective for a fixed or semi-fixed indoor wireless communication system such as a wireless LAN or wireless POS in which a terminal station does not move for a certain period of time. It is. In this embodiment, the same operation and effect as those of the first embodiment can be obtained.

In this embodiment, a directional pattern is formed to detect the direction of an incoming wave, and the directional pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Fifth Embodiment) This embodiment also describes an example of a directional antenna device having a receiving system for receiving a signal and sending the signal to a demodulation unit. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described. In this directional antenna device, as shown in FIG. 11, a weighting processing unit switching unit 41 is provided as a selection unit, and the weighting processing unit switching unit 41 is controlled by a control unit 174 to determine which one of the adding units 19 and 21. Whether the output signal is sent to the demodulation unit is switched. And
The arriving wave direction detecting unit 201 performs a process of fetching the signal from the adding unit 19 and detecting the arriving wave direction when the weighting processing unit switching unit 41 selects to send the output signal from the adding unit 21 to the demodulating unit. When the weighting processing unit switching unit 41 selects to send the output signal from the adding unit 19 to the demodulation unit, a process for taking in the signal from the adding unit 21 and detecting the direction of the incoming wave is performed. .

Therefore, in this directional antenna apparatus, the first weighting means A15 alternately performs weighting of the amplitude and phase so as to detect the direction of the incoming wave, and the second weighting means B16. Direction detector 2
01, the direction of a desired wave from a communication-desiring terminal station and the direction of an unnecessary wave such as an interference wave or an interference wave are detected. A weighting coefficient for amplitude and phase constituting a desired directivity pattern in which a null point is directed in the direction is calculated. Then, also in the second weighting processing means B16, weighting is performed so as to form an optimal directivity pattern alternately with the first weighting processing means A15.

That is, the first weighting means A15
In order to construct a desired directivity pattern based on the information on the direction of the communication desired terminal station detected by the arriving wave direction detection unit 201 and the direction of an unnecessary wave such as an interference wave or an interference wave, the weighting coefficient calculation unit 18 is used. While the signal added by the adding unit 21 is sent to the demodulation unit via the weighting unit switching unit 41, the second weighting unit B16 Then, the amplitude and phase for detecting the direction of the incoming wave are weighted, and the signal added by the adding means 19 is added to the incoming direction detecting unit 20.
Then, the direction of a desired wave from a terminal station desiring communication and the direction of an unnecessary wave such as an interference wave or an interference wave are detected.

When the incoming wave direction detecting section 201 detects the next terminal station which desires communication, the weighting coefficient calculating section 18 detects the directivity in the direction of the next terminal station which desires communication. , A weighting coefficient constituting a desired directivity pattern such that a null point is directed in an unnecessary wave direction such as an interference wave or an interference wave, and the second weighting means B16
Are set in the amplitude and phase weighting units 16a to 16n.

Then, after the current reception is completed, the second weighting processing means B16 is selected by the weighting processing means switching section 41, and at the same time when reception from the next terminal station is started, the first weighting processing means B16 is started. In the weighting processing means A15,
The amplitude and the phase for detecting the direction of the incoming wave are weighted, and the signal added by the adding means 21 is sent to the incoming wave direction detecting unit 201. Then, the signal of the desired wave from the terminal station which desires the communication is transmitted. The direction and the direction of an unnecessary wave such as an interference wave or an interference wave are detected.

Next, a control sequence of the directional antenna device will be described with reference to FIG. First, B20
At 0, the arriving wave direction detecting section 201 fetches a signal obtained by adding each digital signal from the second weighting processing means B16 by the adding means 16, and detects the direction of the arriving wave.

In this arriving wave direction detecting routine, as shown in FIG. 14, in step S401, a weighting coefficient for amplitude and phase for scanning the directivity pattern is calculated, and in step S402, the second weighting means is used. A weighting coefficient is set in B16. Then, in S403, the incoming wave direction detection unit 20
In step S404, the direction of an incoming wave is detected. Then, the processing of S401 to S404 is repeated until the direction of the terminal station that desires communication is detected. Then, when the direction of the terminal desiring to communicate is detected, the incoming wave direction detection routine ends.

Then, in A201, when the incoming wave direction detecting section 201 detects the direction of the terminal station which desires communication via the second weighting processing means B16, the first weighting processing means A15 is controlled in A202. To start receiving.

In this reception routine, as shown in FIG. 13, in S301, the weighting factor calculation unit 18 determines the amplitude and phase weighting factors that constitute the optimal directivity pattern for the terminal station desiring to communicate. Calculation, and in S302,
After setting the weighting coefficient in the first weighting processing means A15, the reception is started in S303.

If the arriving wave direction detecting unit 201 detects that the arriving wave has changed during reception from the terminal station in S304, the weighting coefficient calculation is performed in S305. The weighting coefficient is recalculated and recalculated by the unit 18, and in S306, a new weighting coefficient is set in the first weighting processing unit A15. And S
At 307, when it is determined that the reception has been completed, the reception routine ends.

Thus, the first weighting means A
When the reception using the terminal 15 is completed, the reception from the terminal station desiring the next communication is performed using the second weighting processing means B16. In A203, when reception is started using the second weighting processing means B16, in A204, an incoming wave direction is detected through the first weighting processing means A15, and based on the detection result, Then, a terminal station that desires communication is detected next.

When the terminal station desiring communication is detected, the reception using the second weight processing means B16 is completed at A205, and the reception is enabled using the first weight processing means A15. Waits until the reception becomes possible, and switches the weighting processing means switching unit 41 to A2
At 02, reception starts via the first weighting means A15.

During reception using the first weighting means A15, at B201, the terminal station or the direction of the unnecessary wave to which communication is next desired via the second weighting means B16. To detect. Then, when a terminal station desiring communication is detected, in B202, the reception using the first weighting processing means A15 ends, and the process waits until the reception using the second weighting processing means B50 can be performed. Then, when reception becomes possible, the weighting processing means switching unit 2 is switched, and reception is started at B203 using the second weighting processing means B16.

Next, reception from the terminal station that desires communication is performed by using the first weighting processing means A15.
15, the reception is started using B15
, The direction of the incoming wave is detected via the weighting processing means B16, and the terminal station that desires the next communication is detected.

Therefore, in this directional antenna apparatus, while one of the weighting processing means forms a directional pattern in the direction of the terminal station and performs reception, the other weighting processing means detects the incoming wave direction. The weighting processing unit switching unit 4 is configured by configuring a directivity pattern for performing
It is not necessary to newly form a directivity pattern when the terminal station 1 receives a signal is switched, and the next reception can be started immediately. In other respects, the same functions and effects as those of the first embodiment can be obtained.

In a fixed or semi-fixed indoor radio communication system such as a wireless LAN or a wireless POS in which a terminal station does not move for a fixed period, a base station receives a request for communication from the terminal station on a first-come-first-served basis. In such a case, the next communication desired terminal station is known in advance, and a weighting coefficient for configuring an optimal directivity pattern for the terminal station can be set in advance, which is effective.

In this embodiment, the directivity pattern is formed to detect the direction of the incoming wave, and the pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good. Further, in this embodiment, a reference table may be provided as in the embodiment described above.

(Sixth Embodiment) This embodiment describes an example of a directional antenna device provided with a transmission system for transmitting a signal from a modulation unit from an antenna. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described.

In this directional antenna apparatus, as shown in FIG. 15, a signal sent from a modulation section is first distributed in phase to a plurality of antenna elements 11a to 11n by a common mode distribution means 42, and each of the signals is transmitted to a first antenna. It is supplied to the weighting means A15. Then, the first weighting means A15
In order to form a desired directivity pattern, weighting of the phase and amplitude is performed for each of the antenna elements 11a to 11n by the weighting coefficients calculated by the weighting coefficient calculation unit 18, and the plurality of D / A converters 26a to 26n are weighted. The signal is converted to an analog signal at 26n.

The converted analog signals are converted into radio frequency signals by frequency converters 27a to 27n, and power-amplified by power amplifiers (PA) 23a to 23n, and then transmitted from antenna elements 11a to 11n. Sent as a signal.

Further, the second weighting means B16 transmits the radio waves received by each of the antenna elements 11a to 11n via the antenna sharing parts 22a to 22n in order to calculate the weighting coefficients used in the first weighting means A15. After being amplified by the low-noise amplifiers 12a to 12n, frequency-converted to low frequency bands by the frequency converters 13a to 13n, and converted to digital signals by the A / D converters 14a to 14n, the direction of the incoming wave is detected. For this purpose, the amplitude and phase weighting coefficients for scanning the directivity pattern are supplied to the second weighting means B16.

The signals weighted by the amplitude and phase weighting sections 16a to 16n of the second weighting processing section B16 and added by the addition section 19 are supplied to the incoming wave direction detection section 20. The arriving wave direction detection unit 20 includes
9 to determine whether there is an arriving wave based on the strength of the received power from the direction to which the directivity is directed,
If there is an incoming signal and there is an identification signal from the terminal station, it is determined to be a desired wave, and if there is no identification signal, it is determined to be an unnecessary wave. In this way, the direction of the terminal station that desires communication and the direction of an unnecessary wave such as an interference wave or an interference wave are detected, and the weighting calculation unit 18 calculates the amplitude and phase weighting coefficients constituting the desired directivity pattern.

As described above, according to the present embodiment, it is possible to detect the direction of an incoming wave even during transmission to a terminal station, and to detect that the direction of the incoming wave has changed. In this case, the weighting coefficient can be recalculated by the weighting coefficient calculation unit 18 and the weighting coefficient can be reset in the first weighting unit A15.

If a next desired terminal station is detected during transmission to the terminal station, an optimal directivity pattern for transmitting a signal to the terminal station is formed. The weighting coefficients for the amplitude and the phase are calculated, and immediately after the transmission to the previous terminal station is completed, the new weighting coefficients calculated for the next terminal station are set in the first weighting processing means A15 and transmitted. Can be started, and the directivity control can be switched in a short time to the terminal station that desires communication next.

Further, only one set of array antennas may be used, and this embodiment can also downsize the device. In this embodiment, a directional pattern is configured to detect the direction of an incoming wave, and the directional pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Seventh Embodiment) This embodiment will also describe an example of a directional antenna device provided with a transmission system for transmitting a signal from a modulation unit from an antenna. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described.

As shown in FIG. 16, the directional antenna apparatus includes a desired wave direction detection signal generation unit 24 for generating a signal for detecting a desired wave direction, for example, an inquiry signal for a terminal station. The desired wave direction detection signal generation unit 24 is controlled by the control unit 171 to supply a signal to the in-phase distribution unit 25. The in-phase distribution unit 25 distributes the signal from the desired wave direction detection signal generation unit 24 to the antenna elements 11a to 11n in-phase.

Each of the amplitude and phase weighting sections 16a to 16n of the second weighting processing means B16 has an amplitude and a phase for scanning the directivity pattern calculated in advance by the weighting coefficient calculation section 18 in order to detect the incoming wave direction. A phase weighting factor is set.

In this directional antenna apparatus, the signals in-phase distributed by the in-phase distribution means 25 are applied to the amplitude and phase weighting sections 16a to 16a of the second weighting processing means B16.
16n, the signals are weighted for each of the antenna elements 11a to 11n, converted into analog signals by the D / A converters 26a to 26n, converted to radio frequency signals by the frequency converters 27a to 27a, and then converted into power amplifiers 23a to 23n. The power is amplified. Then, the signal is transmitted as a signal for detecting a desired wave direction from each of the antenna elements 11a to 11n via the antenna sharing units 22a to 22n.

Then, the directional antenna apparatus which has transmitted the signal for detecting the desired wave direction in the direction in which the directional pattern is directed performs reception using the second weighting means B16, It is determined whether there is an incoming wave from the strength of the received power from the direction in which the directivity pattern is directed, and furthermore, whether or not the desired wave is required depending on whether or not there is a response from the terminal station to the desired wave direction detection signal. Determine if it's a wave. In this way, the direction of the terminal station that desires communication and the direction of unnecessary waves such as interference waves and interference waves are detected, and the weighting calculation unit 1
In step 8, the amplitude and phase weighting factors constituting the desired directivity pattern are calculated.

Next, a control sequence of the directional antenna device will be described with reference to FIG. First, B50
At 1, the second weighting processing means B16 starts transmission of the desired wave direction detection signal from the desired wave direction detection signal generation unit 24. Subsequently, in B502, the control unit 171 causes the weighting coefficient calculation unit 18 to calculate, for example, a weighting coefficient of an amplitude and a phase forming a directivity pattern oriented in the -90 ° direction, and in B503, the second weighting coefficient is calculated. Weighting coefficients are set in the amplitude and phase weighting units 16a to 16n of the weighting processing means B16. Then, the incoming wave direction detection unit 2
0, detection of unnecessary wave direction at B504, B505
, The direction of the communication-desired terminal station is detected. In B506, scanning of the directional pattern, for example, from -90 ° to 90 °
It is determined whether or not the scanning has been completed. If the scanning has not been completed, the process returns to B502, and this time, for example, -85 °
The weighting coefficients of the amplitude and the phase forming the directivity pattern oriented in the direction are calculated, the weighting coefficient is set in the second weighting processing means B16 in B503, the unnecessary wave direction is detected in B504, and the unnecessary wave direction is detected in B505. , The direction of the terminal station desiring to communicate is detected. This is repeated until the scanning of the directivity pattern is completed.

When the direction of the communication desired terminal station is detected, the processing from A504 to A511 is performed using the first weighting means A15. That is, when the incoming wave direction detection unit 20 detects the direction of the terminal station that desires communication, in A502, it is determined whether or not the calculation of the weighting coefficients by the weighting coefficient calculation unit 18 has been completed. For example, in A503, the weighting factor calculation unit 18 obtains a weighting factor for forming a desired directivity pattern such that the directivity is oriented in the direction of the communication desired terminal station and the null point is oriented in the unnecessary wave direction, In A504, each amplitude and phase weighting unit 15a of the first weighting processing means A15
After setting the weighting coefficient to ｎ15n, transmission is started in A505.

If the transmission to the terminal station is being performed,
In A506, when the arriving wave direction detecting unit 20 detects that the arriving wave has changed, in A507, the weighting coefficient calculating unit 18 recalculates and calculates the weighting coefficient. A new weighting factor is set in each of the amplitude and phase weighting units 15a to 15n of the first weighting processing unit A15.

Also, while transmitting to the terminal station,
In A510, when the incoming wave direction detection unit 20 detects a terminal station that desires next communication, in A511, the optimal directivity pattern for transmitting to the terminal station is configured. The amplitude and phase weighting coefficients are calculated in advance. When the transmission to the previous terminal station is completed, the new weighting coefficient calculated for the next communication desired terminal is assigned to each amplitude and phase weighting section 15a of the first weighting processing means A15.
To 15n to start transmission.

As described above, this directional antenna device
The signal from the desired wave direction detection signal generation unit 24 is sequentially changed in direction and transmitted, and a response signal from the terminal station to the signal is received to detect a terminal station that desires communication and then to the terminal station. Can start sending. In addition,
In this embodiment, it is needless to say that the same operation and effect as those of the sixth embodiment can be obtained.

In this embodiment, the directivity pattern is formed to detect the direction of the incoming wave and is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Eighth Embodiment) This embodiment also describes an example of a directional antenna device provided with a transmission system for transmitting a signal from a modulation unit from an antenna. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described. This directional antenna device is shown in FIG.
As shown in FIG. 8, a reference table 28 for storing the phase and amplitude weighting coefficients calculated by the weighting coefficient calculator 18 together with the desired wave direction detection signal generator 24 is provided.

In this directional antenna apparatus, the signal transmitted from the modulation section is first distributed in-phase to the plurality of antenna elements 11a to 11n by the in-phase distribution means 42, and the first weighting processing means A15 Are sent to the amplitude and phase weighting units 15a to 15n.

On the other hand, the lookup table 28 stores the amplitude and the phase calculated by the weighting coefficient calculator 18 based on the arrival wave detection information detected by the arrival wave direction detector 20 by combining the desired wave direction and the unwanted wave direction. Weighting coefficients are stored. The amplitude and phase weighting units 15a to 15n of the first weighting processing unit A15 use the arriving wave detection information from the arriving wave direction detecting unit 20 to calculate the amplitude and phase weighting coefficients stored in the reference table 28. The corresponding weighting coefficient is read and set.

Thus, in order to configure a desired directivity pattern for directing the directivity to the terminal station transmitting the in-phase distributed signal by the first weighting processing means A15, the phase is set for each of the antenna elements 11a to 11n. After the amplitude is weighted, the signals are converted into analog signals by the D / A converters 26a to 26n. The analog signals are converted into radio frequency signals by frequency converters 27a to 27n, and power-amplified by power amplifiers 23a to 23n, and then transmitted to antenna elements 11a through antenna sharing units 22a to 22n. 11n is transmitted as a transmission signal.

The signal for detecting the desired wave direction generated by the desired wave direction detection signal generation unit 24, for example, the inquiry signal to the terminal station, is supplied to the in-phase distribution unit 25.
Are distributed to the respective antenna elements 11a to 11n in phase and supplied to the second weighting means B16. Then, the weighting coefficient calculator 1
8, weighting of the amplitude and phase is performed for each of the antenna elements 11a to 11n by an amplitude and phase weighting coefficient for scanning the directivity pattern calculated for detecting the direction of the incoming wave, and then each D / A conversion is performed. The signals are converted into analog signals by the devices 26a to 26n. The analog signals are converted into radio frequency signals by frequency converters 27a to 27n, and power-amplified by power amplifiers 23a to 23n, and then transmitted to antenna elements 11a through antenna sharing units 22a to 22n. 11n is transmitted as a desired wave direction detection signal.

In the directional antenna apparatus, the arriving wave direction detecting unit 20 determines whether there is an arriving wave based on the intensity of the received power from the direction in which the directional direction is turned. It is determined whether the signal is a desired wave or an unnecessary wave based on whether or not there is a response from the terminal station to the desired wave direction detection signal. When the direction of the communication-desired terminal station or the direction of an unnecessary wave such as an interference wave or an interfering wave which is not known at this time is detected, the weighting coefficient calculating unit 18 determines that all the desired wave directions including those directions are unnecessary. The amplitude and phase weighting coefficients are calculated for the combination of the wave directions, and are additionally stored in the lookup table.

Thus, the reference table 28 is provided. In this reference table 28, the amplitude and phase weighting factors for forming the directivity pattern for detecting the direction of the incoming wave are stored in advance, and the incoming wave including the desired wave is stored. Calculate and store weighting coefficients of amplitude and phase for all combinations of the desired wave direction and the unwanted wave direction that are the terminal station directions that desire communication by detecting the direction of the incoming wave including the desired wave. Is changed, the amplitude and phase weighting coefficients are calculated for all combinations of the new desired wave direction and unnecessary wave direction and are additionally stored. Therefore, when the same arriving wave is detected, the weighting coefficient is calculated. Without causing the calculation unit 18 to perform the calculation, the corresponding weighting coefficient of the amplitude and the phase is read from the lookup table 28 and the first weighting processing unit A1
5 may be set in each of the amplitude and phase weighting units 15a to 15n. Therefore, directivity switching control for a terminal station that desires communication can be performed in a shorter time.

In addition, since the same desired wave direction and unnecessary wave direction are calculated once and the amplitude and phase weighting coefficients stored in the reference table 28 are read and used, the wireless LAN or wireless POS is used. This is extremely effective for a fixed or semi-fixed indoor wireless communication system in which a terminal station does not move for a certain period as described above.
In this embodiment, it is needless to say that the same operation and effect as those of the sixth embodiment can be obtained.

In this embodiment, a directional pattern is formed to detect the direction of the incoming wave, and the directional pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Ninth Embodiment) This embodiment also describes an example of a directional antenna device provided with a transmission system for transmitting a signal from a modulation unit from an antenna. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described. This directional antenna device is shown in FIG.
As shown in FIG. 9, a pre-calculation processing unit 29 and a reference table 281 for storing the weighting coefficients calculated by the pre-calculation processing unit 29 are provided in place of the weighting coefficient calculation unit together with the desired wave direction detection signal generation unit 24. .

In this directional antenna apparatus, the signal transmitted from the modulator is first distributed in-phase to the plurality of antenna elements 11a to 11n by the in-phase distribution means 42, and the first weighting processing means A15 Are sent to the amplitude and phase weighting units 15a to 15n.

On the other hand, the reference table 281 stores the amplitude calculated in advance by the pre-calculation processing unit 29 based on the arrival wave detection information detected by the arrival wave direction detection unit 20 by combining the desired wave direction and the unwanted wave direction. A phase weighting coefficient is stored. Then, the first weighting processing means A1
5 are read out from the amplitude and phase weighting coefficients stored in the reference table 281 by the amplitude and phase weighting units 15a to 15n based on the arriving wave detection information from the arriving wave direction detecting unit 20. Is set.

Thus, in order to construct a desired directivity pattern for directing the directivity of the in-phase distributed signal to the terminal station to be transmitted by the first weighting processing means A15, the phase is set for each of the antenna elements 11a to 11n. After the amplitude is weighted, the signals are converted into analog signals by the D / A converters 26a to 26n. The analog signals are converted into radio frequency signals by frequency converters 27a to 27n, and power-amplified by power amplifiers 23a to 23n, and then transmitted to antenna elements 11a through antenna sharing units 22a to 22n. 11n is transmitted as a transmission signal.

The signal for detecting the desired wave generated by the desired wave direction detection signal generation unit 24, ie,
The inquiry signal for the terminal station is in-phase distributed to the antenna elements 11a to 11n by the in-phase distribution means 25 and supplied to the second weighting processing means B16. Then, the second weighting processing means B16 pre-calculates the pre-calculation processing unit 29 in advance.
The antenna element 1 refers to the amplitude and phase weighting coefficients for scanning the directivity pattern stored in the reference table 281 which are calculated in order to detect the incoming wave direction.
After weighting the phases and amplitudes for each of 1a to 11n, the signals are converted into analog signals by the D / A converters 26a to 26n. Then, each analog signal is converted by the frequency converter 27.
a to 27n, the signals are converted into radio frequency signals, and power-amplified by the power amplifiers 23a to 23n. Then, the antenna elements 11a to 11n are transmitted via the antenna sharing units 22a to 22n.
11n is transmitted as a desired wave direction detection signal.

In the directional antenna apparatus, while scanning the directional pattern, the arriving wave direction detecting section 20 determines whether or not there is an arriving wave based on the strength of the received power from the direction in which the directivity is directed. If there is an incoming wave, it is further determined whether the signal is a desired wave or an unnecessary wave based on the presence or absence of a response from the terminal station to the desired wave direction detection signal.

When the direction of the terminal station which desires communication is detected, the directivity is directed in the direction of the terminal station, and the weighting coefficients constituting the directivity pattern in which the null point is directed in the unnecessary wave direction are referred to in the reference table 281. And the amplitude and phase weighting unit 15 of the first weighting processing means A15.
a to 15n and start transmission to the terminal station.

As described above, the pre-calculation processing unit 29 and the reference table 281 are provided, and the pre-calculation processing unit 29 calculates the amplitude and phase weighting coefficients for constructing the directivity pattern for detecting the direction of the incoming wave in advance. An incoming wave including a desired wave is detected in advance in the reference table 281, and a weighting coefficient of amplitude and phase for all combinations of the desired wave direction and the unnecessary wave direction which is the terminal station direction is detected by the pre-calculation processing unit 29. Is calculated and stored in the reference table 281. Therefore, when an incoming wave including a desired wave from a terminal station that has already been set is detected, the calculation of the weighting coefficient is not performed and the corresponding The amplitude and phase weighting factors to be read out are read out and the amplitude and phase weighting sections 15a to 15a of the first weighting means A15 are read out.
n may be set. Therefore, directivity switching control for a terminal station that desires communication can be performed in a shorter time.

The reference table 281 is calculated in advance.
Since the amplitude and phase weighting coefficients stored in the memory are read out and used, it is extremely effective for a fixed or semi-fixed indoor wireless communication system such as a wireless LAN or wireless POS in which a terminal station does not move for a certain period of time. It is. In this embodiment, it is needless to say that the same operation and effect as those of the sixth embodiment can be obtained.

In this embodiment, the directional pattern is formed to detect the direction of the incoming wave, and the directional pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Tenth Embodiment) This embodiment will also describe an example of a directional antenna device having a transmission system for transmitting a signal from a modulation unit from an antenna. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described. As shown in FIG. 20, the directional antenna apparatus includes a weighting processing unit switching unit 411 as a selection unit, and the weighting processing unit switching unit 411 is controlled by a control unit 174 to distribute a signal from the modulation unit to each in-phase distribution unit. Switching is performed so as to supply to either one of the means 25 and 42.

This directional antenna apparatus comprises first weighting means A1 alternately with second weighting means B16.
5, the amplitude and phase are weighted so that the directivity pattern is scanned in order to detect the direction of the incoming wave. The direction of the wave is detected, and the directivity is directed to the terminal station in which the communication is desired by the weighting coefficient calculating unit 18.
A weighting coefficient for the amplitude and the phase constituting a desired directivity pattern in which a null point is directed in the unnecessary wave direction is calculated. The second weighting means B16 also performs weighting to form an optimal directivity pattern for performing transmission to the terminal station alternately with the first weighting processing means A15.

That is, for example, priorities are assigned to the communication-desired terminal stations detected by the incoming wave direction detection unit 201 by the first weighting means A15, and first, the direction and interference of the terminal station desiring to communicate are determined. A weighting coefficient calculation unit 18 calculates a weighting coefficient in order to form a desired directivity pattern based on information on the direction of an unnecessary wave such as a wave or an interference wave, and a signal from the modulation unit is switched to a weighting processing unit switching unit. 411
To the first weighting means A15, and the amplitude and phase weighting sections 15a to 15n perform weighting of the amplitude and phase, and the antenna elements 11a to 11n
Send from.

While the transmission to the first terminal station is being performed using the first weighting means A15, the direction of the terminal station which desires next communication and the unnecessary wave such as an interference wave or an interference wave are transmitted. A weighting coefficient is calculated by the weighting coefficient calculation unit 18 in order to form the next desired directivity pattern based on the direction information, and is set in the second weighting processing unit B16.

After the first transmission to the terminal station,
The second weighting processing means B16 is selected by the weighting processing means switching section 411, and transmission to the next terminal station is started. At the same time, the first weighting processing means A15 further selects a terminal which desires communication next. A weighting coefficient calculator 18 calculates a weighting coefficient to form a desired directivity pattern based on information on the direction of the station and the direction of unnecessary waves such as interference waves and interference waves. Set to A15.

If there is no terminal station with which communication is desired at that time, a weighting unit 15 for each amplitude and phase is used.
a to 15n, weighting the amplitude and phase so that the directivity pattern is scanned in order to detect the direction of the incoming wave again, wait until the current transmission is completed, and after the transmission is completed, the direction and interference of the terminal station desiring to communicate. The direction of an unnecessary wave such as a wave or an interference wave is detected.

As described above, in this directional antenna device,
While one of the weighting means constitutes a directional pattern in the direction of the terminal station and performs transmission, the other weighting means constitutes a directional pattern for detecting an incoming wave direction, and By configuring the directivity pattern in advance in the direction of the terminal station, it is not necessary to newly configure a directivity pattern when switching the terminal station to be transmitted by the weighting processing means switching unit 41, and You can start sending. In other respects, the same functions and effects as those of the first embodiment can be obtained.

In a fixed or semi-fixed indoor wireless communication system such as a wireless LAN or a wireless POS in which a terminal station does not move for a fixed period, a base station receives a communication request request from the terminal station on a first-come, first-served basis. In such a case, the next communication desired terminal station is known in advance, and a weighting coefficient for configuring an optimal directivity pattern for the terminal station can be set in advance, which is effective.

In this embodiment, a directional pattern is formed to detect the direction of an incoming wave, and the directional pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good. Further, in this embodiment, a reference table may be provided as in the embodiment described above.

(Eleventh Embodiment) This embodiment is directed to a directional antenna device having both a receiving system for receiving and transmitting a signal to a demodulation unit and a transmission system for transmitting a signal from a modulation unit from an antenna. An example is described. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described.

As shown in FIG. 21, in this directional antenna apparatus, the signal weighted by the first weighting processing means A15 at the time of reception and the signal added by the addition means 21 is sent to the demodulation section, and the signal from the modulation section is sent at the time of transmission. Signal distribution means 42
, A transmission / reception switching unit 43 for in-phase distribution for each of the antenna elements 11a to 11n and supplying the same to the first weighting unit A15.

In this directional antenna device, at the time of reception, radio waves received by each of the antenna elements 11a to 11n pass through the respective antenna common parts 22a to 22n and are amplified by the low-noise amplifiers 12a to 12n. The frequency is converted to a low frequency band at １３13n. The frequency-converted signals are supplied to the A / D converter 1
4a to 14n, which are converted into digital signals.
15 and the second weighting processing means B16.

The weighting coefficient calculator 18 calculates the amplitude and phase weighting coefficients for forming the desired directivity pattern based on the information from the incoming wave direction detector 20, and calculates the respective amplitudes and amplitudes of the first weighting processing A15. Phase weighting unit 15a
Set to ~ 15n. As a result, each digital signal input to the first weighting processing means A15 is subjected to amplitude and phase weighting by each of the amplitude and phase weighting units 15a to 15n, added by the adding means 21, and then transmitted. -It is sent to the demodulation unit via the reception switching unit 43.

On the other hand, the amplitude and phase weighting sections 16a to 16n of the second weighting processing means B16 are provided with the arrival wave direction detecting section 20 for calculating the weighting coefficients to be set in the first weighting processing means A15. The amplitude and phase are weighted so as to detect the direction of the incoming wave. Each digital signal is weighted by the second weighting means B16, added by the adding means 19, and sent to the incoming wave direction detecting section 20. The arriving wave direction detection unit 20 detects the direction of the terminal that desires communication and the direction of an unnecessary wave such as an interference wave or an interfering wave from the transmitted signal.

At the time of transmission, a signal from the modulation section is supplied to the in-phase distribution section 42 via the transmission / reception switching section 43, and the in-phase distribution section 42 transmits the signals to the antenna elements 11a to 11n.
And the first weighting means A15
Are sent to the amplitude and phase weighting units 15a to 15n. Then, the first weighting processing unit A15 uses the antenna elements 11a to 11a to generate the desired directivity pattern calculated by the weighting coefficient calculation unit 18 based on the signal from the incoming wave direction detection unit 20. Phase / amplitude weighting is performed every 11n, and then a plurality of D / A
The converters 26a to 26n convert the analog signals into analog signals, and convert the converted analog signals to frequency converters 27a to 27n.
n, the signal is converted into a radio frequency signal, and further power-amplified by the power amplifiers 23a to 23n, and then transmitted as a transmission signal from each of the antenna elements 11a to 11n.

As described above, in this directional antenna apparatus, the direction of an incoming wave can be detected even during transmission / reception communication with a terminal station, and the direction of the incoming wave has changed. If detected, the weighting coefficient can be recalculated by the weighting coefficient calculation unit 18 and the weighting coefficient can be reset in the first weighting processing unit A15.

If a next desired terminal station is detected during communication with the terminal station, the terminal station receives a signal from the terminal station or transmits a signal to the terminal station. , The amplitude and phase weighting factors constituting the optimal directivity pattern are calculated, and upon completion of communication with the previous terminal station, the new weighting factors calculated for the next terminal station are immediately replaced with the first weighting factors. The communication can be started by setting the weighting processing means A15, and the directivity control can be switched in a short time to the terminal station that desires the next communication.

In addition, the array antenna used can be commonly used for transmission and reception, and only one array antenna is required, so that the device can be downsized. In this embodiment, the directivity pattern is configured to detect the direction of the incoming wave and is scanned. However, the present invention is not limited to this. A sex pattern may be configured. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station,
After obtaining the communication request, the direction of the terminal station may be detected by gradually narrowing the directivity pattern in that direction.

Further, in this embodiment, the direction of the terminal station desiring to communicate and the direction of the unnecessary wave are detected simply by arriving at the incoming wave including the desired wave from the terminal station. However, the present invention is not limited to this. A signal generation unit for detecting a desired wave direction is provided as in the second and seventh embodiments described above, and the signal generated by the signal generation unit for detecting a desired wave direction is converted into a second weighting processing unit B16. May be transmitted by weighting so as to scan the directivity pattern, and the direction of the desired terminal station or the direction of the unnecessary wave may be detected based on a response from the terminal station to the transmitted signal.

(Twelfth Embodiment) This embodiment is also directed to a directional antenna device having both a reception system for receiving a signal and sending it to a demodulation unit and a transmission system for transmitting a signal from a modulation unit from an antenna. An example is described. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described.

As shown in FIG. 22, the directional antenna device is provided with a reference table 28 for storing the phase and amplitude weighting coefficients calculated by the weighting coefficient calculator 18. In this directional antenna device, at the time of reception,
The radio waves received by each of the antenna elements 11a to 11n pass through the respective antenna common parts 22a to 22n and are amplified by the low noise amplifiers 12a to 12n.
The frequency is converted to a low frequency band at a to 13n. Each of the frequency-converted signals is converted by the A / D converters 14a to 14a-1.
4n, the signals are converted into digital signals, and the digitally converted signals are sent to the first weighting means A15 and the second weighting means B16.

In the second weighting means B16, the weighting of the amplitude and the phase calculated in advance by the weighting coefficient calculating section 18 and stored in the reference table 28 in order to form a directivity pattern for detecting the direction of the incoming wave. The coefficients are set in the amplitude and phase weighting units 16a to 16n. Then, the received signals are weighted by the amplitude and phase weighting units 16a to 16a.
After the weighting is performed at 16n, the addition is performed by the adding means 19, and the incoming wave direction detecting unit 20 detects the incoming wave direction. That is, the direction of a desired wave from the terminal station and the direction of an unnecessary wave such as an interference wave or an interference wave are detected.

The control unit 172 uses the detection signal of the incoming wave direction from the incoming wave direction detection unit 20 to calculate the weighting coefficient
The weighting coefficients for the amplitude and phase are calculated and stored in the reference table 28. In the first weighting process A15, weighting factors for forming a desired directivity pattern are read out from the amplitude and phase weighting factors stored in the reference table 28, and the amplitude and phase weighting units 15a to 15n are read out. Set to.

As a result, the first weighting means A1
Each of the digital signals input to 5 is subjected to amplitude and phase weighting by each of the amplitude and phase weighting sections 15a to 15n, added by the adding means 21, and then transmitted and received by the transmission / reception switching section 43.
Is sent to the demodulation unit via.

When the incoming wave direction detecting section 20 detects a desired wave and an unnecessary wave from a new terminal station, the weighting coefficient calculating section 18 calculates all the desired wave directions and unnecessary waves including those directions. The amplitude and phase weighting factors are calculated for the combination of directions, and additionally stored in the lookup table 28.

At the time of transmission, a signal from the modulation section is supplied to the in-phase distribution section 42 via the transmission / reception switching section 43, and the in-phase distribution section 42 transmits the signals to the antenna elements 11a to 11n.
And the first weighting means A15
Are sent to the amplitude and phase weighting units 15a to 15n. Each of the amplitude and phase weighting units 15a to 15n of the first weighting processing unit A15 is calculated by the weighting coefficient calculation unit 18 based on the signal from the incoming wave direction detection unit 20 and stored in the reference table 28. A weighting coefficient for forming a desired directivity pattern is read from the weighting coefficient and set.

Thus, the signals distributed in-phase by the in-phase distribution means 42 are weighted by the first weighting processing means A15 for phase and amplitude for each of the antenna elements 11a to 11n, and each D / A converter 26a The signal is converted into an analog signal at .about.26n. Each of the analog-converted signals is converted into a radio frequency signal by frequency converters 27a to 27n, power-amplified by power amplifiers 23a to 23n, and transmitted as a transmission signal from each of antenna elements 11a to 11n. You.

Thus, the reference table 28 is provided. In this reference table 28, the amplitude and phase weighting factors for forming the directivity pattern for detecting the direction of the arrival wave are stored in advance, and the arrival wave including the desired wave is stored. Calculate and store weighting coefficients of amplitude and phase for all combinations of the desired wave direction and the unwanted wave direction that are the terminal station directions that desire communication by detecting the direction of the incoming wave including the desired wave. Is changed, the amplitude and phase weighting coefficients are calculated for all combinations of the new desired wave direction and unnecessary wave direction and are additionally stored. Therefore, when the same arriving wave is detected, the weighting coefficient is calculated. The corresponding weighting coefficient of the amplitude and the phase is read out from the reference table 28 without causing the calculating unit 18 to perform the calculation, and the first weighting means A1
5 may be set in each of the amplitude and phase weighting units 15a to 15n. Therefore, directivity switching control for a terminal station that desires communication can be performed in a shorter time.

As described above, the same desired wave direction and unnecessary wave direction are calculated once, and the amplitude and phase weighting coefficients stored in the reference table 28 are read and used. This is extremely effective for a fixed or semi-fixed indoor wireless communication system in which a terminal station does not move for a certain period as described above.
In this embodiment, the same operation and effect as those of the eleventh embodiment can be obtained.

In this embodiment, the directional pattern is formed to detect the direction of the incoming wave, and the directional pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Thirteenth Embodiment) This embodiment is also directed to a directional antenna apparatus having both a reception system for receiving a signal and sending it to a demodulation unit and a transmission system for transmitting a signal from a modulation unit from an antenna. An example is described. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described.

As shown in FIG. 23, this directional antenna apparatus has a pre-calculation processing unit 2 instead of a weighting coefficient calculation unit.
9 and a reference table 281 for storing the weighting coefficients calculated by the pre-calculation processing unit 29.

In this directional antenna apparatus, at the time of reception, radio waves received by a plurality of antenna elements 11a to 11n pass through respective antenna common parts 22a to 22n and are amplified by low noise amplifiers 12a to 12n. The frequency is converted to a lower frequency band in 13a to 13n. The frequency-converted signals are converted into digital signals by A / D converters 14a to 14n, and the digitally converted signals are sent to first weight processing means A15 and second weight processing means B16. .

The second weighting means B16 calculates the arriving wave from the amplitude and phase weighting coefficients calculated in advance by the pre-calculation processing unit 29 and stored in the reference table 281 in order to detect the direction of the arriving wave. The weighting coefficients constituting the directivity pattern for detecting the direction are read out and set in the amplitude and phase weighting units 16a to 16n. Then, the received signals are weighted by the amplitude and phase weighting units 16a to 16a.
After the weighting is performed at 16n, the addition is performed by the adding means 19, and the incoming wave direction detecting unit 20 detects the incoming wave direction. That is, the mobile station detects the direction of the terminal station and the unnecessary wave direction, which are the desired wave directions, for which communication is desired.

The control section 173 calculates a phase and amplitude weighting coefficient to be given to each antenna element to the pre-calculation processing section 29 from the arriving wave direction detected by the arriving wave direction detecting section 20, ie, the desired wave direction and the unnecessary wave direction. Let reference table 28
1 is stored. This is performed for all combinations of the detected terminal station direction and unnecessary wave direction, and stored in the reference table 281.

The first weighting means A15 reads out the weighting coefficients for forming a desired directivity pattern from the amplitude and phase weighting coefficients stored in the reference table 281 and weights each amplitude and phase. Part 15a
Set to ~ 15n. As a result, the transmitted digital signals are weighted in amplitude and phase by the respective amplitude and phase weighting units 15a to 15n of the first weighting processing unit A15, and are added by the adding unit 21. The signal is transmitted to the demodulation unit via the transmission / reception switching unit 43.

At the time of transmission, a signal from the modulation section is supplied to the in-phase distribution section 42 via the transmission / reception switching section 43, and the in-phase distribution section 42 transmits the signals to the antenna elements 11a to 11n.
And the first weighting means A15
Are sent to the amplitude and phase weighting units 15a to 15n.

Each of the amplitude and phase weighting units 15a to 15n of the first weighting processing unit A15 has a desired directivity calculated from the weighting coefficients calculated in advance by the pre-calculation processing unit 6 and stored in the reference table 281. Since the weighting coefficients for configuring the gender pattern are read and set, the in-phase distributed signals are weighted by the first weighting processing unit A15 for phase and amplitude for each of the antenna elements 11a to 11n. Subsequently, each of the D / A converters 26a to 26n is converted into an analog signal. The analog-converted signals are converted into radio frequency signals by frequency converters 27a to 27n, and further converted to power amplifiers 23a to 2n.
3n, each of the antenna elements 11a-11
n is transmitted as a transmission signal.

As described above, the pre-calculation processing unit 29 and the look-up table 281 are provided, and the pre-calculation processing unit 29 previously calculates the amplitude and phase weighting coefficients for forming the directivity pattern for detecting the direction of the incoming wave. An incoming wave including a desired wave is detected in advance in the reference table 281, and a weighting coefficient of amplitude and phase for all combinations of the desired wave direction and the unnecessary wave direction which is the terminal station direction is detected by the pre-calculation processing unit 29. Is calculated and stored in the reference table 281. Therefore, when an incoming wave including a desired wave from a terminal station that has already been set is detected, the calculation of the weighting coefficient is not performed and the corresponding The amplitude and phase weighting factors to be read out are read out and the amplitude and phase weighting sections 15a to 15a of the first weighting means A15 are read out.
n may be set. Therefore, directivity switching control for a terminal station that desires communication can be performed in a shorter time.

The reference table 281 is calculated in advance.
Since the amplitude and phase weighting coefficients stored in the memory are read out and used, it is extremely effective for a fixed or semi-fixed indoor wireless communication system such as a wireless LAN or wireless POS in which a terminal station does not move for a certain period of time. It is. In this embodiment, the eleventh embodiment described above is also used.
It is needless to say that the same operation and effect as those of the embodiment can be obtained.

In this embodiment, a directional pattern is formed to detect the direction of the incoming wave, and the directional pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good.

(Fourteenth Embodiment) This embodiment is also directed to a directional antenna device having both a reception system for receiving a signal and sending it to a demodulation unit and a transmission system for transmitting a signal from a modulation unit from an antenna. An example is described. The same portions as those in the above-described embodiment are denoted by the same reference numerals, and different portions will be described.

In this directional antenna apparatus, as shown in FIG.
Under the control of the control unit 174, the weighting processing unit switching unit 412 switches which output signal of each of the adding units 19 and 21 is to be sent to the demodulation unit at the time of reception, and switches the signal from the modulation unit at the time of transmission. Which of the in-phase distribution means 42 and 25 is supplied is switched.

When the weighting processing means switching section 412 selects transmission of the output signal from the adding means 21 to the demodulation section, the arriving wave direction detecting section 201 fetches the signal from the adding means 19 to obtain the arriving wave direction. When the weighting means switching unit 412 selects sending the output signal from the adding means 19 to the demodulation unit, the signal from the adding means 21 is fetched to detect the direction of the incoming wave. It has become.

That is, in this directional antenna apparatus, the first weighting means A15 alternately performs weighting of the amplitude and phase so as to detect the direction of the incoming wave, and the second weighting means B16. The direction detecting unit 201 detects the direction of the communication-desired terminal station and the direction of an unnecessary wave such as an interference wave or an interfering wave. Calculates the amplitude and phase weighting factors constituting the desired directivity pattern such that the null point is oriented. The second weighting means B16 is also weighted alternately with the first weighting means A15 to form an optimal directivity pattern.

Therefore, the first weighting means A15
The weighting coefficient calculator 18 is used to construct a desired directivity pattern based on information on the direction of the communication-desired terminal station detected by the incoming wave direction detector 201 and the direction of unnecessary waves such as interference waves and interference waves. While the communication is performed by weighting with the amplitude and phase weighting coefficients calculated in step (2), the second weighting processing means B16 detects an incoming wave including a desired wave from the communication-desired terminal station in the received signal. Weighting of the amplitude and the phase is performed. The weighted signals are added by the adder 19 and sent to the incoming wave direction detector 201 to detect the direction of the communication-desired terminal station and the direction of unnecessary waves such as interference waves and interference waves.

When the incoming communication direction detection unit 201 detects the next communication terminal station, the directivity is directed to the communication desired terminal station detected by the weighting coefficient calculation unit 18.
A weighting coefficient constituting a desired directivity pattern in which a null point is directed in the direction of an interference wave or an unnecessary wave is calculated and set in the second weighting processing means B16.

Then, after the end of the current communication, the second weighting means B16 is selected by the weighting means switching unit 412, and communication with the next terminal station is started, and at the same time, the first weighting means A15 receives the signal. The weighting of the amplitude and the phase is performed on the obtained signal so as to detect an incoming wave including a desired wave from the communication desired terminal station. The weighted signals are added by the adding means 19 and sent to the incoming wave direction detecting section 201 to detect the direction of the communication desired terminal station and the direction of unnecessary waves such as interference waves and interference waves.

As described above, in this directional antenna apparatus, while one of the weighting processing means forms a directional pattern in the direction of the terminal station and performs communication, the other weighting processing means uses the incoming wave direction. By configuring a directivity pattern for detecting the terminal station and configuring a directivity pattern in advance for the direction of the next terminal station, when the weighting processing means switching unit 412 switches a terminal station to communicate with, a new The next communication can be started instantaneously without having to configure a directivity pattern. In other respects, the same functions and effects as those of the above-described eleventh embodiment can be obtained.

In a fixed or semi-fixed indoor radio communication system such as a wireless LAN or a wireless POS in which the terminal station does not move for a certain period, the base station receives a request for communication from the terminal station on a first-come, first-served basis. In such a case, the next communication desired terminal station is known in advance, and a weighting coefficient for configuring an optimal directivity pattern for the terminal station can be set in advance, which is effective.

In this embodiment, the directivity pattern is formed to detect the direction of the incoming wave, and the pattern is scanned. However, the present invention is not limited to this.
An omni-directional pattern may be configured to detect the incoming wave direction. In this case, even if the direction of the terminal station is detected from the communication request from the terminal station, or the direction of the terminal station is detected by gradually narrowing the directivity pattern in that direction after obtaining the communication request. Good. Further, in this embodiment, a reference table may be provided as in the embodiment described above.

[0189]

As described above in detail, according to the inventions described in the claims, it is possible to control the directivity of the next communication partner during reception, transmission, or transmission or reception communication. Can be calculated, whereby the terminal station to communicate next can control the directivity of a plurality of antenna elements in a desired wave direction in a short time, and
The size of the device can be reduced.

According to the third, eighth, and twelfth aspects of the present invention, a table for storing amplitude and phase weighting coefficients is provided, and when the incoming wave direction changes, the amplitude for the new incoming wave direction is changed. By calculating the weighting factor of the phase and the phase and storing it in the table, when the same arriving wave direction is detected, the weighting factor of the amplitude and the phase can be read out from the table and used, so it is necessary to calculate the weighting factor of the amplitude and the phase again Therefore, this is useful when the terminal station is fixed or semi-fixed, and control for directing the directivity of a plurality of antenna elements in the direction of the next communicating terminal station can be performed in a shorter time.

According to the fourth, ninth, and thirteenth aspects of the present invention, a table for storing amplitude and phase weighting coefficients is provided, and the amplitude and phase weighting coefficients based on the direction of arrival are calculated in advance. When performing communication, the corresponding amplitude and phase weighting coefficients may be read out from the table and used without calculating the amplitude and phase weighting coefficients when performing communication. Very useful in the case of fixed,
Control for directing the directivity of the plurality of antenna elements in the direction of the terminal station to communicate next can be performed in a shorter time.

According to the fifth, tenth, and fourteenth aspects of the present invention, while one of the weighting processing means forms a directional pattern in the direction of the terminal station and performs communication, the other weighting processing means performs the other. Since the weighting processing means configures a directivity pattern for detecting the direction of the incoming wave, calculates the weighting coefficients of the amplitude and phase, and then configures the directivity pattern in advance for the direction of the terminal station performing communication, There is no need to newly construct a directivity pattern when switching communication terminals, and the next communication can be started immediately.

[Brief description of the drawings]

FIG. 1 is a block diagram of a directional antenna device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a wireless communication system in the embodiment.

FIG. 3 is a flowchart showing a control sequence in the embodiment.

FIG. 4 is a block diagram of a directional antenna device according to a second embodiment of the present invention.

FIG. 5 is a block diagram of a directional antenna device according to a third embodiment of the present invention.

FIG. 6 is a diagram showing a wireless communication system according to the embodiment;

FIG. 7 is a diagram showing a configuration of a reference table according to the embodiment;

FIG. 8 is a block diagram of a directional antenna device according to a fourth embodiment of the present invention.

FIG. 9 is a diagram showing a wireless communication system in the embodiment.

FIG. 10 is a diagram showing a configuration of a reference table according to the embodiment.

FIG. 11 is a block diagram showing a directional antenna device according to a fifth embodiment of the present invention.

FIG. 12 is a flowchart showing a control sequence in the embodiment.

FIG. 13 is a flowchart showing signal reception control in the control sequence of FIG. 12;

FIG. 14 is a flowchart showing incoming wave direction detection control in the control sequence of FIG. 12;

FIG. 15 is a block diagram of a directional antenna device according to a sixth embodiment of the present invention.

FIG. 16 is a block diagram of a directional antenna device according to a seventh embodiment of the present invention.

FIG. 17 is a flowchart showing a control sequence in the embodiment.

FIG. 18 is a block diagram of a directional antenna device according to an eighth embodiment of the present invention.

FIG. 19 is a block diagram of a directional antenna device according to a ninth embodiment of the present invention.

FIG. 20 is a block diagram of a directional antenna device according to a tenth embodiment of the present invention.

FIG. 21 is a block diagram of a directional antenna device according to an eleventh embodiment of the present invention.

FIG. 22 is a block diagram of a directional antenna device according to a twelfth embodiment of the present invention.

FIG. 23 is a block diagram of a directional antenna device according to a thirteenth embodiment of the present invention.

FIG. 24 is a block diagram of a directional antenna device according to a fourteenth embodiment of the present invention.

FIG. 25 is a block diagram showing a conventional example.

[Explanation of symbols]

 11a to 11n antenna elements 15, 16 weighting processing means 17 control section 18 weighting coefficient calculation sections 19, 21 addition means 20 arrival direction detecting section

 ──────────────────────────────────────────────────の Continued on the front page F term (reference) 5J021 AA06 CA06 DB02 DB03 EA04 FA14 FA15 FA16 FA17 FA20 FA29 FA30 FA32 GA02 HA05 HA10 5K059 CC02 CC03 CC04 DD33 DD34 EE02

Claims (14)

[Claims] 1. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein two weights are connected to each of the antenna elements and weight the phase and amplitude of each signal received by these antenna elements. Means, respectively connected to the two weighting means, two adding means for adding the weighted signals, and detecting means for detecting the direction of the incoming wave from the output of one of the two adding means, Setting means for setting a weighting coefficient for each weighting means, wherein the setting means sets a weighting coefficient for forming a directional pattern for detecting an incoming wave direction in one of the weighting means, and the other Calculates and sets a weighting coefficient based on the direction of the incoming wave detected by the detecting means, and the detecting means includes a directional pattern for detecting the direction of the incoming wave. Directional antenna apparatus characterized by detecting the direction of arrival from the output of the connected summing means to the weighting means sets the weighting factor to form a down. 2. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein two weights are connected to each of the antenna elements and weight the phase and amplitude of each signal received by these antenna elements. Means, respectively connected to the two weighting means, two adding means for adding the weighted signals, and detecting means for detecting the direction of the incoming wave from the output of one of the two adding means, Setting means for setting a weighting coefficient for each weighting means, signal generating means for generating a signal for detecting a desired wave direction, and in-phase distribution means for in-phase distributing a signal from the signal generating means to each of the antenna elements The setting means includes a weighting unit for forming a directional pattern for detecting an incoming wave direction in one of the weighting means. Is set on the other side by calculating and setting a weighting coefficient from the direction of arrival of the wave detected by the detection means, and forming the directivity pattern for detecting the direction of the arrival wave of the signal in-phase distributed by the in-phase distribution means. To the antenna elements via weighting means for setting a weighting coefficient for, and connected to a weighting means for setting a weighting coefficient for forming a directional pattern for detecting an incoming wave direction by the detecting means. A directional antenna device for detecting an incoming wave direction from an output of an adding means. 3. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein two weights are connected to each of the antenna elements, and weights phases and amplitudes of signals received by these antenna elements. Means, respectively connected to the two weighting means, two adding means for adding the weighted signals, and detecting means for detecting the direction of the incoming wave from the output of one of the two adding means, Setting means for setting a weighting coefficient for each weighting means, wherein the detecting means outputs an output of an adding means connected to the weighting means for setting a weighting coefficient for forming a directional pattern for detecting an incoming wave direction. From the incoming wave direction,
The setting means includes a table, stores a weighting coefficient calculated from the direction of the incoming wave detected by the detecting means in the table, and forms a directional pattern for detecting the direction of the incoming wave on one of the weighting means. Set a weighting coefficient for the other, if the arriving wave direction detected by the detection means is already detected arriving wave direction, read and set the corresponding weighting coefficient from the table, and set the arriving wave direction already detected If it is different, the directional antenna device is characterized in that a new weighting factor is calculated and additionally stored in the table, and the calculated weighting factor is set. 4. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein two weights are connected to each of the antenna elements and weight the phase and amplitude of each signal received by these antenna elements. Means, respectively connected to the two weighting means, two adding means for adding the weighted signals, and detecting means for detecting the direction of the incoming wave from the output of one of the two adding means, Setting means for setting a weighting coefficient for each weighting means, wherein the detecting means outputs an output of an adding means connected to the weighting means for setting a weighting coefficient for forming a directional pattern for detecting an incoming wave direction. From the incoming wave direction,
The setting means includes a table, and a weighting coefficient calculated from the direction of the incoming wave detected by the detecting means is stored in the table in advance, and one of the weighting means has a directional pattern for detecting the direction of the incoming wave. A directional antenna device for setting a weighting coefficient for forming the second parameter, and reading and setting a corresponding weighting coefficient from the table based on an incoming wave direction detected by the detection means. 5. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein two weights are connected to each of the antenna elements and weight the phase and amplitude of each signal received by these antenna elements. Means, connected to the two weighting means, respectively, two adding means for adding the weighted signals, a detecting means for detecting the direction of the incoming wave from the output of the two adding means, and each of the weighting means Setting means for setting respective weighting coefficients, and selecting means for selectively taking out the output of each of the adding means, wherein the setting means forms a directional pattern for detecting an incoming wave direction on one of the weighting means. When a weighting coefficient for setting is set, the other side calculates and sets a weighting coefficient from the arriving wave direction detected by the detecting means. When a weighting coefficient for forming a directional pattern for detecting an incoming wave direction is set in the other of the weighting means, a weighting coefficient is calculated and set in one of the weighting means from the incoming wave direction detected by the detecting means. Detects the direction of the incoming wave from the output of the adding means connected to the weighting means that sets the weighting coefficient for forming the directivity pattern for detecting the direction of the incoming wave, and the selecting means detects the direction of the incoming wave. A directional antenna device, wherein an output of an adding means connected to a weighting means set by calculating a weighting coefficient from an incoming wave direction is selected. 6. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein: an in-phase distribution unit for in-phase distribution of a transmission signal to each of the antenna elements; and the in-phase distribution unit connected to each of the antenna elements. A first weighting means for weighting the phase and amplitude of each signal distributed in-phase at the second phase, and a second weighting means connected to each antenna element and weighting the phase and amplitude of each signal received by these antenna elements. Weighting means, an addition means connected to the second weighting means for adding the weighted signals, a detection means for detecting an incoming wave direction from an output of the addition means, and a weighting means for each of the weighting means. Setting means for setting a coefficient, wherein the setting means includes a second weighting means for forming a directional pattern for detecting an incoming wave direction. Set only with coefficients, directional antenna device wherein the first weighting means and setting by calculating the weighting coefficients from DOA the detection means detects. 7. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein: a first in-phase distribution means for in-phase distribution of a transmission signal to each of the antenna elements; First weighting means for weighting the phase and amplitude of each signal in-phase distributed by the first in-phase distribution means, and phase and amplitude of each signal connected to each of the antenna elements and received by these antenna elements Second weighting means for performing weighting of the signals; addition means connected to the second weighting means for adding the weighted signals; detection means for detecting an incoming wave direction from an output of the addition means; Setting means for setting a weighting coefficient for each weighting means, signal generation means for generating a signal for detecting a desired wave,
Second in-phase distribution means for in-phase distribution of a signal from the signal generation means to each of the antenna elements, wherein the setting means forms a directional pattern for detecting an incoming wave direction in the second weighting means. A weighting factor for the first weighting means to calculate and set a weighting factor from the direction of the incoming wave detected by the detection means, and a signal in-phase distributed by the second in-phase distribution means is set to the first weighting means. A directional antenna device, wherein the signal is supplied to each of the antenna elements via the second weighting means, and the direction of arrival is detected from the output of the adding means by the detection means. 8. A directional antenna apparatus for controlling directivity using a plurality of antenna elements, wherein: an in-phase distribution unit for in-phase distribution of a transmission signal to each of the antenna elements; and the in-phase distribution unit connected to each of the antenna elements. A first weighting means for weighting the phase and amplitude of each signal distributed in-phase at the second phase, and a second weighting means connected to each antenna element and weighting the phase and amplitude of each signal received by these antenna elements. Weighting means, an addition means connected to the second weighting means for adding the weighted signals, a detection means for detecting an incoming wave direction from an output of the addition means, and a weighting means for each of the weighting means. Setting means for setting a coefficient, wherein the setting means includes a table, and the weighting coefficient calculated from the incoming wave direction detected by the detection means is set in advance. The second weighting means sets a weighting coefficient for forming a directivity pattern for detecting an incoming wave direction, and the first weighting means stores the incoming wave direction detected by the detecting means. If the direction of the arriving wave has already been detected, the corresponding weighting coefficient is read from the table and set.If the direction of the arriving wave is different from the direction of the already detected arriving wave, a new weighting coefficient is calculated and additionally stored in the table. A directional antenna device, wherein a calculated weighting factor is set. 9. A directional antenna apparatus for controlling directivity using a plurality of antenna elements, wherein: an in-phase distribution unit for in-phase distribution of a transmission signal to each of the antenna elements; and the in-phase distribution unit connected to each of the antenna elements. A first weighting means for weighting the phase and amplitude of each signal distributed in-phase at the second phase, and a second weighting means connected to each antenna element and weighting the phase and amplitude of each signal received by these antenna elements. Weighting means, an addition means connected to the second weighting means for adding the weighted signals, a detection means for detecting an incoming wave direction from an output of the addition means, and a weighting means for each of the weighting means. Setting means for setting a coefficient, wherein the setting means includes a table, and predicts a weighting coefficient calculated from the incoming wave direction detected by the detecting means. Stored in the table, a weighting coefficient for forming a directivity pattern for detecting an incoming wave direction is set in the second weighting means, and the detection means detects the weighting coefficient in the first weighting means. A directional antenna device, wherein a corresponding weighting coefficient is read from the table based on an incoming wave direction and set. 10. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein two in-phase distribution means for in-phase distributing a transmission signal to each of said antenna elements; Two weighting means respectively connected to each in-phase distribution means and for weighting the phase and amplitude of each signal in-phase distributed by each in-phase distribution means, and each weighted signal connected to each weighting means and , A detecting means for detecting an incoming wave direction from the outputs of the two adding means, a setting means for setting a weighting coefficient for each of the weighting means, and a selective means for each of the in-phase distribution means. Selecting means for supplying a transmission signal to the, wherein the setting means sets a directional pattern for detecting an incoming wave direction to one of the weighting means. When a weighting coefficient for performing the setting is set, a weighting coefficient is calculated and set on the other side from the direction of the incoming wave detected by the detecting means, and a directional pattern for detecting the direction of the incoming wave is formed on the other of the respective weighting means. When a weighting coefficient is set, a weighting coefficient is calculated and set on one side from the direction of arrival of the wave detected by the detection means, and the detection means is a weighting coefficient for forming a directional pattern for detecting the direction of the arrival wave. Detecting the direction of the incoming wave from the output of the adding means connected to the weighting means having set the weighting means, and selecting the in-phase signal connected to the weighting means set by calculating a weighting coefficient from the direction of the incoming wave detected by the detecting means. A directional antenna device for supplying a transmission signal to distribution means. 11. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein: an antenna sharing unit for transmitting and receiving the antenna elements; a switching unit for switching between transmission and reception; In-phase distribution means for in-phase distribution to each of the antenna elements,
Connected to the antenna sharing means and connected to the in-phase distribution means, and weights the phase and amplitude of each signal in-phase distributed by the in-phase distribution means and the phase of each signal received by each antenna element. First weighting means for weighting the amplitude, second weighting means connected to the antenna sharing means for weighting the phase and amplitude of each signal received by each antenna element, and the first weighting means A first adding means connected to the second weighting means for adding the weighted signals; a second adding means connected to the second weighting means for adding the weighted signals; and the second adding means. Detecting means for detecting the direction of the incoming wave from the output of the weighting means, and setting means for setting a weighting coefficient for each of the weighting means, wherein the setting means comprises: A weighting coefficient for forming a directional pattern for detecting an incoming wave direction is set in the weighting means, and a weighting coefficient is calculated and set in the first weighting means from the incoming wave direction detected by the detection means. The directional antenna device, wherein the switching means supplies a transmission signal to the in-phase distribution means at the time of transmission, and takes in a reception signal from the first addition means at the time of reception. 12. A directional antenna apparatus for controlling directivity using a plurality of antenna elements, wherein: an antenna sharing unit for transmitting and receiving the antenna elements; a switching unit for switching between transmission and reception; In-phase distribution means for in-phase distribution to each of the antenna elements,
Connected to the antenna sharing means and connected to the in-phase distribution means, and weights the phase and amplitude of each signal in-phase distributed by the in-phase distribution means and the phase of each signal received by each antenna element. First weighting means for weighting the amplitude, second weighting means connected to the antenna sharing means for weighting the phase and amplitude of each signal received by each antenna element, and the first weighting means A first adding means connected to the second weighting means for adding the weighted signals; a second adding means connected to the second weighting means for adding the weighted signals; and the second adding means. Detecting means for detecting the direction of the incoming wave from the output of the controller, and setting means for setting a weighting coefficient for each of the weighting means. The setting means includes a table. , A weighting coefficient calculated from the direction of the incoming wave detected by the detecting means is stored in the table, and a weighting coefficient for forming a directional pattern for detecting the direction of the incoming wave is set in the second weighting means, If the arriving wave direction detected by the detecting means is the already detected arriving wave direction, the first weighting means reads and sets the corresponding weighting coefficient from the table, and is different from the already detected arriving wave direction. If the weighting coefficient is newly calculated, the weighting coefficient is additionally stored in the table, and the calculated weighting coefficient is set. The switching means supplies a transmission signal to the in-phase distribution means at the time of transmission, and the first addition means at the time of reception. A directional antenna device for receiving a received signal from the means. 13. A directional antenna apparatus for controlling directivity using a plurality of antenna elements, wherein: an antenna sharing unit for transmitting and receiving the antenna elements; a switching unit for switching between transmission and reception; In-phase distribution means for in-phase distribution to each of the antenna elements,
Connected to the antenna sharing means and connected to the in-phase distribution means, and weights the phase and amplitude of each signal in-phase distributed by the in-phase distribution means and the phase of each signal received by each antenna element. First weighting means for weighting the amplitude, second weighting means connected to the antenna sharing means for weighting the phase and amplitude of each signal received by each antenna element, and the first weighting means A first adding means connected to the second weighting means for adding the weighted signals; a second adding means connected to the second weighting means for adding the weighted signals; and the second adding means. Detecting means for detecting the direction of the incoming wave from the output of the controller, and setting means for setting a weighting coefficient for each of the weighting means. The setting means includes a table. The weighting coefficient calculated from the direction of the incoming wave detected by the detecting means is stored in the table in advance, and the second weighting means includes a weighting coefficient for forming a directional pattern for detecting the direction of the incoming wave. The first weighting means reads and sets a corresponding weighting coefficient from the table based on the direction of arrival detected by the detection means, and the switching means transmits the transmission signal to the in-phase distribution means during transmission. A directional antenna device which receives a received signal from the first adding means at the time of reception. 14. A directional antenna device for controlling directivity using a plurality of antenna elements, wherein: an antenna sharing unit for transmitting and receiving the antenna elements; a switching unit for switching between transmission and reception; And two in-phase distribution means for in-phase distribution to each of the antenna elements, and connected to the common antenna means and connected to each of the in-phase distribution means, respectively. Weighting means for weighting the phase and amplitude of each signal received by each of the antenna elements, and respectively connected to the two weighting means, and adds the weighted signals. Two adding means, detecting means for detecting the direction of the incoming wave from the outputs of the two adding means, and Setting means for setting the respective weighting coefficients, and selecting means for selectively supplying a transmission signal to each of the in-phase distributing means and selectively extracting the output of each of the adding means, wherein the setting means comprises: When a weighting coefficient for forming a directional pattern for detecting an incoming wave direction is set in one of the weighting means, a weighting coefficient is calculated and set in the other weighting means from the incoming wave direction detected by the detecting means. When a weighting coefficient for forming a directional pattern for detecting an incoming wave direction is set on the other of the means, a weighting coefficient is calculated and set from the incoming wave direction detected by the detecting means on one side, and the detecting means is The direction of the incoming wave is calculated from the output of the adding means connected to the weighting means for setting the weighting coefficient for forming the directivity pattern for detecting the direction of the incoming wave. Out, the selection means, at the time of transmission,
A weighting coefficient is calculated from the direction of the incoming wave detected by the detection means, and a transmission signal is supplied to the in-phase distribution means connected to the weighting means set by the weighting means. Upon reception, a weighting coefficient is calculated from the direction of the arrival wave detected by the detection means. A directional antenna device for receiving a received signal from an adding means connected to the weighting means set as above.