JP2001077614A - Radio reception equipment and antenna direction adjusting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide radio reception equipment in which an antenna direction will not be adjusted erroneously by precisely discriminating a desired wave and an interference wave, and to provide an antenna direction adjusting method. SOLUTION: In this adjusting method, a reception route ID extraction circuit 104 extracts reception route ID contained in a reception signal, and the detection output of a reception level detection circuit 103 is outputted to a monitor terminal 107, only when reception route ID extracted by the reception rote ID extraction circuit 104 is matched with a desired reception route ID. The output of the monitor terminal 107 is converted into audible sounds by the audible sound conversion circuit 201 of a reception level measuring device 200 and it is generated from a speaker 202. The direction of an antenna 110 is adjusted, in the direction at for which audible sound generated from the speaker becomes the maximum.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio receiving apparatus and an antenna direction adjusting method thereof, and more particularly, to a radio receiving apparatus having an antenna direction adjusting function of receiving a transmission wave from a desired radio station with maximum sensitivity. The present invention relates to a method of adjusting the antenna direction.

[0002]

2. Description of the Related Art Generally, in a radio receiving apparatus for performing radio communication using a millimeter wave or a quasi-millimeter wave, the direction of an antenna of the radio receiving apparatus is correctly adjusted to the direction of a transmitting side radio station for performing communication. Is required.

Conventionally, the adjustment of the antenna direction in this type of radio receiving apparatus is performed, for example, by monitoring the change in the audible sound generated according to the strength of the received wave, the fluctuation of the meter needle, and the like. Was adjusted by adjusting the direction of the antenna to the direction in which the maximum was obtained.

By the way, in the above-mentioned conventional method of adjusting the direction of the antenna, when another wireless system is present in the vicinity, an interference wave from the other system and a desired wave from the transmitting-side wireless station that originally performs communication are compared. Since it cannot be distinguished, there is a problem that the direction of the antenna is erroneously adjusted to the direction of the interference wave.

FIG. 8 is a diagram for explaining a problem of the conventional radio receiving apparatus.

In FIG. 8, station A 1 and station B 2 communicate with each other by transmitting / receiving a radio signal to / from each other via a radio path 5 using antennas 1a and 2a. Here, there is a C station 3 in the vicinity of the A station 1 which is communicating with the D station 4 by transmitting and receiving a radio signal via the radio path 6 with the D station 4 and the antenna 3a and the antenna 4a. It is assumed that it exists in the vicinity of the B station 2.

In this case, the A station 1 receives the reception wave from the B station 2 via the radio path 5 by the antenna 1a, and also receives the reception wave from the D station 4 via the interference wave path 7. become. Here, since the B station 2 is the original communication partner of the A station 1, the received wave from the B station 2 becomes a desired wave for the A station 1, but the D station 4 is not the original communication partner of the A station 1. Therefore, the received wave from the D station 4 becomes an interference wave for the A station 1.

Here, for example, when the received wave from the B station 2 and the received wave from the D station 4 at the A station 1 have substantially the same level, the A station 1 receives the signal from the B station 2. And the received wave from the D station 4 cannot be distinguished.
There is a case where the antenna 1a of the station 1 is erroneously adjusted in the direction of the reception wave from the station D.

FIG. 9 is a diagram for explaining another problem of the conventional radio receiving apparatus.

[0010] In FIG. 9, an A station 11 and a B station 12 communicate with each other by transmitting and receiving a radio signal to and from each other via a radio path 15 by the antennas 1 a and 12 a. here,
In the vicinity of the B station 12, the antenna 13a and the D station 14 are mutually
There is a C station 13 communicating by transmitting and receiving a radio signal via the radio channel 6 by the antenna 14a, and furthermore, the B station 1
It is assumed that a building 18 that reflects a radio wave from the D station 14 exists in the vicinity of the building 2.

In this case, the A station 11 receives the reception wave from the B station 12 via the radio path 15 by the antenna 11a, and also receives the reception wave from the D station 4 through the direct path 17-1.
And via the reflection path 17-2 by the building 18. Here, since the B station 12 is the original communication partner of the A station 11, the received wave from the B station 12 becomes the desired wave for the A station 11, but the D station 14 is not the original communication partner of the A station 11. Therefore, for the A station 11, the reception wave from the D station 14 via the direct path 17-1 and the reception wave from the building 18 via the reflection path 17-2 by the building 18 become interference waves.

Here, the received wave from the D station via the direct path 17-1 can be distinguished from the received wave from the B station 12 because its direction is greatly different from the received wave from the B station 12. The received wave via the reflection path 17-2 is B
Since the direction of the received wave from the station 12 and the direction thereof are not significantly different, for example, the received wave from the B station 12 in the A station 11 and the received wave from the D station 14 via the reflection path 17-2 by the building 18 are substantially the same. If it is a level, A station 1
Cannot distinguish the two, and the antenna 1a of the A station 1 may be erroneously adjusted in the direction of the reflection path 17-2 by the building 18.

FIG. 10 is a diagram for explaining still another problem of the conventional radio receiving apparatus.

In FIG. 10, an A station 21 and a B station 22 mutually communicate with each other via an antenna 21a and an antenna 22a.
5 for transmitting and receiving wireless signals. Here, the C station 23 and the D station 24 of another wireless system exist near the B station path 12, and the A station 21 receives the desired wave from the B station 22 via the wireless path 15 by the antenna 21 a. , And the received wave from the C station 23 is received as an interference wave via the interference path 26, and further, the D station 2
It is also assumed that the received wave from No. 4 is also received as an interference wave via the interference path 27.

In this case, if the desired wave from the B station 22 and the interference wave from the C station 23 and the interference wave from the D station 24 at the A station 21 are at substantially the same level, the A
For the station 1, the distinction cannot be made.
May be incorrectly adjusted in the direction of the C station 23 or the D station 24.

FIG. 11 is a diagram showing the relationship between the reception monitor value at station A and its antenna direction angle in the case of FIG.

In FIG. 11, the reception monitor value at the A station 21 indicates that the direction angle of the antenna 21a of the A station 21 is C
The peak value is obtained when the position is adjusted in the directions of the station 23, the B station 22, and the D station 24. Here, the peak value 23p when the direction angle of the antenna 21a of the A station 21 is adjusted in the direction of the C station 23 is due to the interference wave from the radio path 26, and is adjusted in the direction of the B station 22. Time peak value 22p
Is based on a desired wave from the wireless path 25, and the peak value 24p when adjusted in the direction of the D station 24 is based on an interference wave from the wireless path 27.

Here, the respective peak values 23p, 22
Assuming that p and 24p are substantially the same, in the station A21, any one of the antenna direction angles corresponding to the peak values 23p, 22p, and 24p has the antenna 21a of the station A21.
Cannot be discriminated as to whether or not to adjust, and as a result, the antenna 21a of the A station 21 may be erroneously adjusted in the direction of the C station 23 or the D station 24.

[0019]

As described above, according to the conventional antenna adjustment method, the change of the audible sound generated according to the strength of the received wave, the fluctuation of the meter needle, and the like are monitored while the transmission wave is adjusted. Since the adjustment was performed by adjusting the direction of the antenna to the direction in which the reception level was maximized, for example, when another wireless system exists in the vicinity, the transmitting wireless station that originally communicates with the interference wave from the other system There is a problem that the direction of the antenna is erroneously adjusted to the direction of the interference wave because it cannot be distinguished from the desired wave from the antenna.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a radio receiving apparatus and an antenna direction adjusting method in which the antenna direction is not erroneously adjusted by accurately discriminating a desired wave and an interference wave. .

[0021]

According to a first aspect of the present invention, there is provided a radio receiving apparatus having an antenna and receiving a received wave via the antenna. Receiving level detecting means for detecting an identification code, an identification code recognizing means for recognizing an identification code included in the received wave, and the level detecting means when the identification code recognized by the identification code recognizing means is a desired identification code. Antenna adjustment means for adjusting the direction of the antenna based on the reception level detected by the antenna.

According to a second aspect of the present invention, in the first aspect of the present invention, the antenna adjusting means detects the level when the identification code recognized by the identification code recognition means is a desired identification code. A desired wave monitor terminal for outputting a reception level detected by the means; and an audible sound generating means for generating an audible sound corresponding to the output level of the desired wave monitor terminal, wherein the audible sound is generated from the audible sound generating means. The direction of the antenna is adjusted so that the audible sound is maximized.

[0023] The invention according to claim 3 provides an outdoor apparatus having an antenna and receiving a received wave via the antenna.
A wireless reception device that is connected to the outdoor device and includes an outdoor device that demodulates and outputs a received wave; a reception level detection unit that is provided in the outdoor device and detects a reception level of the received wave; An identification code detecting means provided in the device and detecting an identification code included in the received wave based on the demodulated output of the received wave; and an identification code provided in the outdoor device and detected by the identification code detection means is desirable. A reception level monitor circuit for outputting a reception level detected by the level detection means in the case of the identification code, and an antenna adjustment means for adjusting the direction of the antenna based on a monitor output of the reception level monitor circuit. It is characterized by the following.

According to a fourth aspect of the present invention, there is provided a radio receiving apparatus having an antenna and receiving a received wave via the antenna, extracting a desired received wave having a desired frequency from the received wave. Means, a reception level detection means for detecting a reception level of a reception wave of a desired frequency extracted by the desired reception wave extraction means, and a reception level of a reception wave of a desired frequency detected by the level detection means. Antenna adjusting means for adjusting the direction of the antenna.

According to a fifth aspect of the present invention, in the invention of the fourth aspect, a first monitor terminal for outputting a reception level of a reception wave of a desired frequency detected by the reception level detection means; And a second monitor terminal for outputting a received wave, wherein the direction of the antenna is adjusted based on the output of the first monitor terminal, and the frequency distribution of the interference wave is adjusted based on the output of the second monitor terminal. It is characterized by detecting.

According to a sixth aspect of the present invention, in an antenna direction adjusting method for a radio receiving apparatus having an antenna and receiving a received wave via the antenna, the identification code included in the received wave is recognized. A desired wave including a desired identification code is identified from the received waves, and the direction of the antenna is adjusted based on the reception level of the identified desired wave.

According to a seventh aspect of the present invention, in the sixth aspect, an audible sound corresponding to the reception level of the desired wave is generated, and the direction of the antenna is adjusted so that the audible sound is maximized. It is characterized by adjusting.

According to an eighth aspect of the present invention, in the antenna direction adjusting method for a radio receiving apparatus having an antenna and receiving a received wave via the antenna, a received wave having a desired frequency is extracted from the received wave. And detecting the reception level of the extracted reception wave of the desired frequency and adjusting the direction of the antenna based on the reception level of the detected reception wave of the desired frequency.

According to a ninth aspect of the present invention, in the eighth aspect of the present invention, the direction of the antenna is adjusted based on a reception level of the reception wave of the desired frequency.
A frequency distribution of the interference wave is detected based on the received wave.

[0030]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a radio receiving apparatus and an antenna direction adjusting method according to the present invention;

FIG. 1 is a block diagram showing one embodiment of a radio receiving apparatus according to the present invention and a radio receiving apparatus formed by applying the antenna direction adjusting method.

In FIG. 1, this radio receiving apparatus 100
Has an antenna 110 for receiving a reception wave, and is connected to a monitor terminal 107 by a reception level measuring device 200 for outputting a reception level as an audible sound.

Here, the radio receiving apparatus 100 is connected to an antenna 110, and performs a receiving circuit 101 for receiving and processing a received wave received by the antenna 110, and a demodulating circuit 102 for demodulating an output of the receiving circuit 101 and outputting it as a received output. ,
A reception level detection circuit 103 for detecting a reception level of a reception wave from an output of the reception circuit 101, a reception route ID extraction circuit 104 for extracting a reception route ID (reception route identification code) from an output of the demodulation circuit 102, and a reception route ID extraction circuit A comparison circuit 105 for determining whether or not the reception route ID extracted at 104 matches a desired reception route ID, and a reception level detection circuit 1 based on the matching output of the comparison circuit 105
ON / OFF for outputting the output of 03 to the monitor terminal 107
The switching circuit 106 is provided.

The reception level measuring device 200 includes an audible sound conversion circuit 201 for converting a signal output from the monitor terminal 107 into an audible sound, and a speaker 202 for generating an audible sound converted by the audible sound conversion circuit 201. It is composed.

FIG. 2 is a radio frame format diagram showing a frame structure of a reception signal received by the radio reception apparatus shown in FIG.

In FIG. 2, a received signal received by radio receiving apparatus 100 shown in FIG.
It is composed of a signal in frame units composed of a reception route ID 122, data 123, and an error detection code (FEC) 124.

Here, the receiving route ID 122 is added by the transmitting side radio station that communicates with the receiving apparatus 100, and the receiving route ID 122 determines whether the received wave is a desired wave used for the original communication or another system. Can be distinguished from the interference wave.

In the radio receiving apparatus 100 of this embodiment, the received wave is a desired wave used for the original communication or an interference wave from another system using the reception route ID of the radio frame format shown in FIG. And the direction of the antenna 110 is adjusted based on the received level of the desired signal.

That is, in a wireless system in which the wireless receiving apparatus 100 of this embodiment is adopted, communication between each wireless device is performed in a wireless frame format as shown in FIG. Here, it is guaranteed that the reception route ID included in the radio frame format is a radio signal from a legitimate destination. That is, the reception route I of the reception wave
If D matches a preset reception route ID, it is known that this reception wave is a reception wave from a legitimate partner,
On the other hand, if they do not match, it is understood that the interference wave is from other than the authorized partner.

Therefore, in this embodiment, the receiving route ID included in the received signal is extracted by the receiving route ID extracting circuit 104, and the receiving route ID extracted by the receiving route ID extracting circuit 104 is set to the desired receiving route ID. Only when they match, the detection output of the reception level detection circuit 103 is output to the monitor terminal 107.
07 is converted into an audible sound by the audible sound conversion circuit 201 of the reception level measuring apparatus 200 and is generated from the speaker 202, and the direction of the antenna 110 is adjusted so that the audible sound generated from the speaker is maximized.

That is, when the comparison circuit 105 determines that the reception route ID included in the reception signal matches the desired reception route ID, the ON / OFF switching circuit 106 is switched ON by the output of the comparison circuit 105. Controlled. If the reception route ID included in the reception signal does not match the desired reception route ID, the ON / OFF switching circuit 106 is controlled to be turned OFF by the output of the comparison circuit 105.

As a result, only the reception level of the reception wave from the legitimate partner is selected and output to the monitor terminal 107, whereby the reception level measuring device 200 receives the reception wave from the legitimate partner. An audible tone is generated that varies only with the level. Therefore, while listening to the audible sound generated from the reception level measuring device 200, the antenna 1
The direction angle of 10 is adjusted, and the reception level measuring device 20 is adjusted.
By finding the position where the audible sound generated from 0 becomes maximum, the direction angle of the antenna 110 can be easily adjusted.

FIG. 3 is a diagram showing the relationship between the reception monitor value output to the monitor terminal of the radio reception apparatus shown in FIG. 1 and the antenna direction angle.

According to this embodiment, as described above, only the reception level of the reception wave from the authorized partner is selected and output to monitor terminal 106, and thus the reception level output to monitor terminal 106 is selected. Monitor value and antenna 11
The relation with the direction angle of 0 depends only on the reception level of the reception wave from the authorized partner and does not include the influence of the interference wave or the like.
Therefore, the antenna 1 is set so that the reception level monitor value output to the monitor terminal 106 becomes maximum (peak value p).
If the direction angle of the antenna 10 is adjusted, the direction angle of the antenna 110 can be adjusted optimally, and the adjustment using only the reception level of the reception wave from the authorized partner can be performed. It is no longer adjusted in the direction of the interfered wave, and the adjustment operation is greatly simplified.

In the above-described embodiment, the audible sound corresponding to the reception level is generated from the reception level measuring device 200. Here, the audible sound is
The volume may change depending on the reception level,
Further, the pitch may change. In this case, for example,
When an audible sound whose volume changes in accordance with the reception level is adopted, the direction angle of the antenna 110 is adjusted to a position where the volume of the audible sound is maximized. When an audible sound whose pitch changes is adopted, the antenna 11 is located at a position where the pitch of the audible sound is highest.
The direction angle of 0 will be adjusted.

In the configuration shown in FIG. 1, only the processing of the received signal is shown.
When 00 has a transmission function, it naturally includes a configuration for realizing this transmission function.

According to such a configuration, the interference wave and the desired wave can be clearly distinguished even when another radio system using the same frequency, particularly the same frequency and using the same radio frame format exists in the vicinity. Therefore, it is possible to reliably prevent an erroneous adjustment in which the direction of the antenna 110 is erroneously adjusted to the direction of the interference wave.

FIG. 4 is a block diagram showing another embodiment of the radio receiving apparatus according to the present invention.

The radio receiving apparatus 100 shown in FIG. 4 uses a tester 210 as a receiving level measuring device.
The other configuration is the same as the configuration shown in FIG. Therefore, in FIG. 4, parts performing the same functions as in FIG. 1 are denoted by the same reference numerals as in FIG. 1 for convenience of description, and detailed description thereof will be omitted.

In the case of this configuration, the meter hand of the tester 210 fluctuates in accordance with the monitor value of the reception level of the reception wave from the normal partner output from the monitor terminal 107. Therefore, by adjusting the direction angle of the antenna 110 so that the deflection of the meter needle of the tester 210 is maximized, it is possible to easily and reliably adjust the optimum direction of the antenna 110.

FIG. 5 is a block diagram showing still another embodiment of the radio receiving apparatus according to the present invention.

Generally, in this type of radio receiving apparatus that handles millimeter waves or quasi-millimeter waves, an outdoor unit (ODU) installed on the roof of a building and an indoor unit (ODU) installed inside a building or the like are installed. And an indoor unit (IDU) connected by a coaxial cable or the like.

Therefore, the wireless receiving device shown in FIG. 5 is applied to a wireless receiving device composed of the outdoor unit (ODU) and the indoor unit (IDU).

In FIG. 5, the radio receiving apparatus includes an outdoor unit (ODU) 300 and an outdoor unit (ODU) 300
Equipment (I) connected to the
DU) 400.

The outdoor unit (ODU) 300 includes an antenna 301, an amplifier 302 for amplifying a signal received by the antenna 301, and a control circuit 3 connected to an output of the amplifier 302.
05, and outputs the synthesized signal to the terminal 307, and the indoor unit (IDU) input from the terminal 307.
The control signal is separated from the signal from
52, a combiner / distributor 303, a reception level monitor circuit 304 for monitoring the reception level of the reception wave from the output of the amplifier 302, a control circuit 305 for controlling the overall operation of the outdoor unit (ODU) 300, and a reception level monitor value. A monitor terminal 306 and a terminal 307 for connection to an indoor unit (IDU) 400 are provided.

An indoor unit (IDU) 400 is connected to a terminal 4 connected to a terminal 307 via a coaxial cable 500.
04, a combining / distributing circuit 401 for combining / distributing signals input / output from the terminal 404, a demodulator 402 for demodulating an output of the combining / distributing circuit 401, and a receiving route ID detecting circuit 403 for detecting a receiving route ID from an output of the demodulator 402. It comprises.

In the above configuration, the received wave received by the antenna 301 is transmitted to the amplifier 3 of the outdoor unit (ODU) 300.
The signal is amplified at 02 and input to the terminal 401 of the indoor unit (IDU) 400 via the distributor / synthesizer 303, the terminal 307, and the coaxial cable 500.

The outdoor device (OD) input to the terminal 401
In the signal from U) 300, only the received signal is separated by distribution / synthesizer 401 and added to demodulator 402, where it is demodulated and output as a reception output.

The receiving route ID detecting circuit 403 detects the receiving route ID included in the received signal based on the demodulated signal demodulated by the demodulator 402. And this receiving route I
The reception route ID detected by the D detection circuit 403 is transmitted to the outdoor unit (ODU) via the distributor / combiner 401, the terminal 404, the coaxial cable 500, the terminal 307, and the distributor / combiner 303.
300 to the control circuit 305.

The control circuit 305 includes an indoor unit (IDU) 4
Based on the reception route ID from 00, it is determined whether the received wave is from a legitimate partner, and if the received wave is from a legitimate partner, the reception level monitor circuit 30
Notify 4.

The reception level monitor circuit 304 creates a reception level monitor value corresponding to the reception level from a legitimate partner based on the notification from the control circuit 305, and outputs this to the monitor terminal 306.

Here, since the reception level monitor value output to the monitor terminal 306 corresponds only to the reception level from a legitimate destination, this monitor terminal 306
If, for example, the reception level measurement device 200 shown in FIG. 1 is connected to the reception level measurement device 200, the reception level measurement device 200 generates an audible sound that changes only in response to the reception level of the reception wave from the authorized partner. This makes it possible to easily and surely adjust the directional angle of the antenna 301 as in the configuration shown in FIG.

The monitor terminal 306 has, for example,
When the tester 210 shown in FIG. 4 is connected, the meter hand of the tester 210 swings in accordance with the monitor value of the reception level of the received wave from the authorized partner, and the meter hand of the tester 210 is swung. By adjusting the directional angle of the antenna 110 so as to maximize the shake, it is possible to easily and reliably perform the optimal adjustment of the direction of the antenna 110.

FIG. 6 is a block diagram showing still another embodiment of the radio receiving apparatus according to the present invention.

In the above-described embodiment, the use of the reception route ID enables the interference wave to be detected even when another radio system using the same frequency, particularly the same frequency and using the same radio frame format, is present in the vicinity. Although the configuration has been described in which the desired wave can be clearly distinguished so that the direction of the antenna 110 can be adjusted reliably and easily, different frequencies are used in the embodiment shown in FIG. A configuration is shown in which, when another wireless system exists in the vicinity, the direction of the antenna can be easily adjusted by distinguishing the interference wave from the desired wave.

In FIG. 6, this radio receiving apparatus 600
Is an RF input terminal 60 to which an antenna (not shown) is connected.
1. An amplifier 602 for amplifying a radio signal (RF signal) from the RF input terminal 601; a mixer 603 for mixing the output of the amplifier 602 and the output of the local oscillator 604; and a distributor 605 for distributing the outputs of the local oscillator 604 and the mixer 603. , A variable amplifier 606 that variably amplifies one output of the divider 605 and outputs the amplified output as a reception output,
5, a band-pass filter 607 for selectively outputting a desired signal from the other output, a detector 608 for detecting the output of the band-pass filter 607, an interference wave monitor terminal 609 for outputting one output of the distributor 605, and a detector 608. And a desired wave monitor terminal 608 for outputting the output of FIG.

In FIG. 6, a radio signal input from an RF input terminal 601 is mixed by a mixer 603 with a local oscillator 6.
The signal is down-converted by being mixed with the local signal from the receiver 04 and input to the distributor 600.

The distributor 600 distributes the down-converted signal from the mixer 603 into a signal for forming a reception output and a signal for adjusting the antenna direction according to the present invention. Then, the signal for forming the reception output distributed by distributor 600 is output as a reception output via variable amplifier 606 constituting AGC (automatic gain control).

The signal for adjusting the antenna direction distributed by distributor 600 is input to band-pass filter 607, where a signal having a desired frequency is selected and output to detection circuit 608. Here, the bandpass filter 607 has its pass frequency band set to the frequency band of the desired wave of the radio receiving apparatus 600.

The detection circuit 608 includes the band pass filter 6
A signal having a desired frequency signal (desired wave) from 07 is detected and converted to a signal corresponding to the reception level of the desired frequency signal (desired wave). The output of the detection circuit 608 is output to a desired wave monitor terminal 608. Accordingly, a reception level signal that depends only on the desired wave and is not affected by the interference wave or the like is output to the desired wave monitor terminal 608.

The signal for adjusting the antenna direction distributed by distributor 600 is output to interference wave monitor terminal 609. The signal output to the interference wave monitor terminal 609 is a signal containing an interference wave.

In FIG. 6, a portion surrounded by a dotted line forms a main part of the present invention, and the other configuration is the same as the conventional configuration. Although FIG. 6 shows only the receiving system, when wireless receiving apparatus 600 has a transmitting function, it is needless to say that the wireless receiving apparatus 600 has a circuit portion for realizing the transmitting function.

FIG. 7 is a diagram for explaining the adjustment of the antenna direction using the radio receiving apparatus shown in FIG.

In FIG. 7, a spectrum analyzer 7 is connected to an interference wave monitor terminal 609 of the radio receiving apparatus 600.
00 is connected and the desired wave monitor terminal 608 is connected to the tester 8
00 is connected.

As described above, this radio receiving apparatus 600
The signal output to the desired wave monitor terminal 608 is a signal indicating the reception level of the desired wave which depends only on the desired wave and is not affected by the interference wave or the like. Therefore, the meter hand of the tester 800 connected to the desired wave monitor terminal 608 swings in accordance with the reception level of the received wave from the authorized partner, and the swing of the meter needle of the tester 800 becomes maximum. By adjusting the direction angle of the antenna of radio receiving apparatus 600 as described above, it is possible to easily and reliably perform the optimum adjustment of the antenna direction.

By connecting the reception level measuring device 200 shown in FIG. 1, for example, to the desired wave monitoring terminal 608, the reception level measuring device 200 outputs only the reception level of the reception wave from an authorized partner. Audible sound that changes in response to the above can be generated, thereby making it possible to easily and surely adjust the directional angle of the antenna 301 as in the configuration shown in FIG.

Since the signal including the interference wave is output to the interference wave monitor terminal 609 as described above, the spectrum analyzer 700 connected to the interference wave monitor terminal 609 indicates the frequency distribution of the interference wave. Information can be obtained.

[0078]

As described above, according to the present invention,
Since the desired wave including the desired identification code is identified from the received waves by recognizing the identification code included in the received wave, and the antenna direction is adjusted based on the reception level of the identified desired wave. Even when another wireless system using the same frequency, especially the same frequency and using the same radio frame format, is present in the vicinity, the interference wave and the desired wave can be clearly distinguished, and the direction of the interference wave is erroneously determined. It is possible to reliably prevent an erroneous adjustment of adjusting the direction of the antenna.

Further, according to the present invention, a reception wave of a desired frequency is extracted from the reception wave, a reception level of the extracted reception wave of the desired frequency is detected, and the reception wave of the detected desired frequency is detected. Since the antenna direction is adjusted based on the reception level, it is possible to clearly distinguish the interference wave and the desired wave even when another wireless system using a different frequency is present in the vicinity, It is possible to reliably prevent erroneous adjustment in which the direction of the antenna is erroneously adjusted to the direction of the interference wave.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a radio receiving apparatus and a radio receiving apparatus configured by applying an antenna direction adjusting method thereof according to the present invention.

FIG. 2 is a wireless frame format diagram showing a frame configuration of a received signal received by the wireless receiving device shown in FIG. 1;

3 is a diagram illustrating a relationship between a reception monitor value output to a monitor terminal of the wireless reception device illustrated in FIG. 1 and an antenna direction angle.

FIG. 4 is a block diagram showing another embodiment of the radio receiving apparatus according to the present invention.

FIG. 5 is a block diagram showing still another embodiment of the radio receiving apparatus according to the present invention.

FIG. 6 is a block diagram showing still another embodiment of the radio receiving apparatus according to the present invention.

7 is a diagram illustrating adjustment of an antenna direction using the wireless reception device illustrated in FIG. 6;

FIG. 8 is a diagram illustrating a problem of a conventional wireless receiving device.

FIG. 9 is a diagram illustrating another problem of the conventional wireless receiving device.

FIG. 10 is a diagram illustrating still another problem of the conventional wireless receiving device.

11 is a diagram showing a relationship between a reception monitor value at station A and its antenna direction angle in the case of FIG. 10;

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 wireless receiving device 101 receiving circuit 102 demodulating circuit 103 receiving level detecting circuit 104 receiving route ID extracting circuit 105 comparing circuit 106 ON / OFF switching circuit 107 monitor terminal 110 antenna 200 receiving level measuring device 201 audible sound converting circuit 202 speaker 210 tester 300 Outdoor unit (ODU) 301 Antenna 302 Amplifier 303 Combination distributor 304 Reception level monitor circuit 305 Control circuit 306 Monitor terminal 307 Terminal 400 Indoor unit (IDU) 401 Combination distributor 402 Demodulator 403 Reception route ID detection circuit 404 Terminal 600 Wireless reception Device 601 RF terminal 602 Amplifier 603 Mixer 604 Local oscillator 605 Divider 606 Variable amplifier 607 Bandpass filter 608 Detector 609 Interference wave monitor Child 610 desired wave monitor terminal 700 spectrum analyzer 800 tester

Continued on the front page (72) Inventor Kazuyoshi Ogura 3-1-1 Asahigaoka, Hino-shi, Tokyo Inside the Toshiba Hino Plant (72) Inventor Takeshi Sawada 3-1-1 Asahigaoka, Hino-shi, Tokyo 1 share F-term in Toshiba Hino factory (reference) DD17 DD44 EE12 EE34 FF25 KK01 LL11

Claims (9)

[Claims] 1. A radio receiving apparatus having an antenna and receiving a reception wave via the antenna, a reception level detection means for detecting a reception level of the reception wave, and recognizing an identification code included in the reception wave. An identification code recognizing means, and an antenna adjusting means for adjusting the direction of the antenna based on a reception level detected by the level detecting means, when the identification code recognized by the identification code recognizing means is a desired identification code; A wireless receiving device comprising: 2. The antenna adjusting means comprises: a desired wave monitor terminal for outputting a reception level detected by the level detection means when the identification code recognized by the identification code recognition means is a desired identification code; Audible sound generating means for generating an audible sound corresponding to the output level of the desired wave monitor terminal, wherein the direction of the antenna is adjusted so that the audible sound generated from the audible sound generating means is maximized. The wireless receiving device according to claim 1, wherein: 3. A radio receiving apparatus comprising: an outdoor device having an antenna for receiving a received wave via the antenna; and an outdoor device connected to the outdoor device for demodulating and outputting the received wave. A reception level detection unit provided in the outdoor unit for detecting a reception level of the reception wave; and an identification code detection unit provided in the indoor unit for detecting an identification code included in the reception wave based on a demodulated output of the reception wave. Means, provided in the outdoor device, when the identification code detected by the identification code detection means is a desired identification code,
A radio reception apparatus comprising: a reception level monitor circuit that outputs a reception level detected by the level detection unit; and an antenna adjustment unit that adjusts the direction of the antenna based on a monitor output of the reception level monitor circuit. apparatus. 4. A radio receiving apparatus having an antenna and receiving a reception wave via the antenna, a desired reception wave extracting means for extracting a reception wave of a desired frequency from the reception wave, Reception level detection means for detecting a reception level of a reception wave of a desired frequency extracted by the means; and antenna adjustment for adjusting a direction of the antenna based on a reception level of the reception wave of a desired frequency detected by the level detection means. Wireless receiving apparatus comprising: 5. It further comprises: a first monitor terminal for outputting a reception level of a reception wave of a desired frequency detected by the reception level detection means; and a second monitor terminal for outputting the reception wave, The radio receiving apparatus according to claim 4, wherein the direction of the antenna is adjusted based on an output of the first monitor terminal, and a frequency distribution of an interference wave is detected based on an output of the second monitor terminal. 6. A method for adjusting the antenna direction of a radio receiving apparatus having an antenna and receiving a reception wave via the antenna, comprising the steps of: recognizing an identification code included in the reception wave; An antenna direction adjusting method for a radio receiving apparatus, comprising: identifying a desired wave including the identification code of the above; and adjusting the direction of the antenna based on the reception level of the identified desired wave. 7. The radio receiving apparatus according to claim 6, wherein an audible sound corresponding to the reception level of the desired wave is generated, and the direction of the antenna is adjusted so that the audible sound is maximized. Antenna direction adjustment method. 8. A method for adjusting the antenna direction of a radio receiving apparatus having an antenna and receiving a received wave via the antenna, comprising: extracting a received wave having a desired frequency from the received wave; An antenna direction adjusting method for a radio receiving apparatus, comprising: detecting a reception level of a reception wave of a frequency; and adjusting a direction of the antenna based on the reception level of the detection wave of the reception wave of a desired frequency. 9. The radio according to claim 8, wherein the direction of the antenna is adjusted based on the reception level of the reception wave of the desired frequency, and the frequency distribution of the interference wave is detected based on the reception wave. A method for adjusting the antenna direction of a receiving device.