JP3208633B2 - Wireless reception method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving method and apparatus in a wireless communication system, and more particularly to preventing or reducing unnecessary incoming calls and interference during reception to provide a better wireless line. The present invention relates to a wireless reception system.

In a radio communication system, for example, when there is a fixed radio communication system using radio waves of the same radio frequency adjacent to each other, transmission waves from mutually different radio communication systems arrive as unnecessary waves in a receiving device.

[0003] Even when the radio frequencies are different, the receiving apparatus is disturbed by reception of an intermodulation wave due to input of transmission waves of a plurality of other radio communication systems having an intermodulation relation, a sensitivity suppression effect, and the like.

[0004] In a radio communication system, it is necessary to be able to effectively avoid the effects of such various types of interference in accordance with the situation of each radio receiving station device.

[0005]

2. Description of the Related Art FIG. 45 shows a configuration example of a conventional radio communication system, and is a block diagram of a system including a radio transmission device 1 and a radio reception device 2.

[0006] The incoming level of the radio wave at the radio receiver 2 is determined by the distance from the radio transmitter 1 to the radio receiver 2,
There is a large difference depending on the propagation state of radio waves and the conditions of the antenna system. Conventionally, the reception operation threshold value of the wireless reception device 2 is set to the lowest reception operation point in order to suppress noise output by the squelch circuit, and is set as the lower limit value.

[0007] In the wireless transmission device 1, a transmission baseband signal is input from an input terminal 101 to a transmitter (Tx) 104 to transmit a transmission wave composed of a modulated wave as a radio wave via a transmission antenna 105.

[0008] In the radio receiving apparatus 2, the receiving antenna 2
01, the incoming signal is transmitted via radio frequency (RF)
The signal is amplified by a high-frequency amplifier (RFA) 203 in the unit 20 and is converted into a signal of an intermediate frequency fi by mixing with a local oscillation output from a local oscillator (LO) 205 in a mixer (MIX) 204. This signal is subjected to a required band limitation in a band-pass filter (BPF) 206 to increase selectivity, and an intermediate frequency amplifier (IF)
A) The signal is amplified and output at 207. This output is detected by a detector (DT) 208 and demodulated into a baseband signal. The demodulated baseband signal is amplified to a required level by a baseband amplifier (LFA) 212,
It is sent out from the output terminal 213 as a reception output.

Further, in a squelch circuit (SQ) 210,
The level of a noise component is detected from the detection output. When the level of the noise component is large, a squelch control signal 216 is generated, and a switch circuit (SW) 211 provided on the input side of the baseband amplifier 212 is turned off. Therefore, when the noise component level falls below the set value, the switch circuit 211 is turned on to generate a reception output, and when the noise component level rises above the set value, the switch circuit 211 is turned off to mute the reception output. I do.

In this case, in a squelch circuit that operates only with the level of the detected noise component, the operation threshold cannot be set in a wide range in response to a change in the intensity of the incoming radio wave. If the variable range of the threshold value is required to be wide, the carrier wave intensity obtained by rectifying the intermediate frequency signal extracted from the unsaturated point of the intermediate frequency amplifier 207 according to the incoming level with a rectifier is obtained. The signal 209 can also be combined as the squelch control signal 216 by combining the detection signal of the noise component with the opposite polarity.

Further, as a countermeasure for preventing interference of an interference wave,
By setting the lower threshold of the squelch circuit by a squelch setting device (not shown) in the wireless receiver,
The interference wave was removed.

[0012]

In the conventional radio receiving method, the control of the squelch operation in the radio receiving station apparatus is performed only by setting the lower threshold value. Was not enough.

In addition, it is necessary to set the operation state of the device at each radio receiving station while observing the incoming state of the received radio wave. In a radio communication system having a large number of radio receiving stations, adjustment of the device is required. There were difficulties in terms of efficiency. Further, there is a problem that a wireless reception station installed in a place where setting is difficult cannot set an operation threshold value according to each reception state.

An object of the present invention is to solve such a problem of the prior art. In a radio receiving station apparatus, a receiving operation point according to an incoming call level from a communication partner station is automatically set as a threshold value. By doing so, it is possible to provide a wireless communication system capable of efficiently setting an operation threshold value in a wireless receiving station device and sufficiently eliminating strong interference from interference. It is intended to be.

[0015]

FIG. 1 shows the principle configuration (1) of the present invention. In FIG. 1, the same components as those in FIG. 45 are denoted by the same reference numerals, 22 is a threshold setting switch for activating the threshold setting operation of the reception output control in the wireless reception device 2, and 23 controls the reception output corresponding to the radio field intensity. A comparison operation unit 221 that generates and generates a lower threshold value for performing the operation is a memory that stores the lower limit threshold data generated by the comparison operation unit 23.

When the threshold setting switch 22 of the wireless receiving device 2 is turned on while receiving a radio wave from the wireless transmitting device 1 as a communication partner, the comparison arithmetic unit 23 is activated. The comparison calculator 23 takes in the incoming radio wave intensity signal 215 from the squelch circuit 210 and performs a calculation to generate a lower limit threshold value of the reception output control corresponding to the radio wave intensity. Memory 221
Stores the threshold data of the calculation result. Here, the incoming radio wave intensity signal is created by adding the carrier intensity signal 209 from the radio frequency unit 20 and the noise output at the output of the detector 208 to opposite polarities, as described later.

Thereafter, each time a radio wave arrives, the comparison arithmetic unit 23
, A lower limit threshold value stored in the memory 221 is compared with the incoming radio wave intensity signal, a control output is generated according to the comparison result, and the switch circuit 211 is turned off when the incoming radio wave intensity signal is lower than the lower threshold value. , The output of the baseband signal to the output terminal 213 is determined. In this way, an incoming radio wave whose incoming radio wave intensity signal is lower than the threshold is not received.

FIG. 2 shows the principle configuration (2) of the present invention. In FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals, and 214 is an AND circuit (LG) that performs an AND operation.

When the threshold setting switch 22 of the wireless receiving device 2 is turned on while receiving the radio wave from the wireless transmitting device 1 of the communication partner, the comparison arithmetic unit 23 is activated. The comparison calculator 23 takes in the incoming radio wave intensity signal 215 from the squelch circuit 210 and performs a calculation to generate an upper limit threshold value of the reception output control corresponding to the radio wave intensity. Memory 221
Stores the threshold data of the calculation result.

Thereafter, each time a radio wave arrives, the comparison arithmetic unit 23
, The threshold value stored in the memory 221 is compared with the incoming radio wave intensity signal, and a control output is generated according to the comparison result. The AND circuit 214 generates an output when an AND condition between the control output of the comparison arithmetic unit 23 and the squelch control signal 216 of the squelch circuit 210 is satisfied, and controls the switch circuit 211 to be turned off. Thus, the output of the baseband signal to the output terminal 213 is determined.
This prevents the incoming radio wave from being received when the incoming radio wave intensity signal is lower than the squelch operation threshold and when the incoming radio wave intensity signal is higher than the upper limit threshold stored in the memory 221.

FIG. 1 also shows the principle configuration (3) of the present invention. However, the difference is that the comparison arithmetic unit 23 obtains two types of thresholds, a lower threshold and an upper threshold, as the calculation result.

When the threshold setting switch 22 of the wireless receiving device 2 is turned on while receiving a radio wave from the wireless transmitting device 1 of the communication partner, the comparison arithmetic unit 23 is activated. The comparison arithmetic unit 23 takes in the incoming radio wave intensity signal 215 from the squelch circuit 210 and performs a calculation to generate a lower limit threshold and an upper limit threshold of the reception output control corresponding to the radio wave intensity.
The memory 221 stores these two types of thresholds.

Thereafter, each time a radio wave arrives, the comparison calculator 23
, The two types of thresholds stored in the memory 221 are compared with the incoming radio wave intensity signal, and a control output is generated according to the comparison result. When the incoming radio wave intensity signal is lower than the lower threshold, and when the incoming radio wave intensity signal is higher than the upper threshold, At this time, by controlling the switch circuit 211 to be turned off, the output of the baseband signal to the output terminal 213 is determined. Thereby, the incoming radio wave is not received when the incoming radio wave intensity signal is lower than the lower threshold and when it is higher than the upper threshold.

FIG. 3 shows the principle configuration (4) of the present invention. 3, the same components as those in FIG. 1 are denoted by the same reference numerals, and reference numeral 202 denotes a variable attenuator (ATT) inserted between the receiving antenna 201 and the radio frequency unit 20. Note that if the variable attenuator 202 has a function of holding a control input, the memory 221 is unnecessary.

When the threshold setting switch 22 of the wireless receiving device 2 is turned on while receiving the radio wave from the wireless transmitting device 1 of the communication partner, the comparison arithmetic unit 23 is activated. The comparison arithmetic unit 23 takes in the incoming radio wave intensity signal 215 from the squelch circuit 210, performs an arithmetic operation, and
The required amount of attenuation by 2 is obtained. The memory 221 stores this attenuation value.

Thereafter, each time a radio wave arrives, the comparison arithmetic unit 23
Controls the amount of attenuation of the variable attenuator 202 based on the attenuation value stored in the memory 221. In this state, the squelch circuit 210 generates a squelch control signal 216 and controls the switch circuit 211 to be turned off, thereby determining the output of the baseband signal to the output terminal 213. Thus, in a state where the variable attenuator 202 is inserted, the incoming radio wave when the incoming radio wave intensity signal is lower than the squelch operation threshold is not received.

FIG. 4 shows the principle configuration (5) of the present invention. In FIG. 4, the same components as those in FIG.
The difference is that it is controlled by the output from. The basic configuration (5) has a configuration in which the basic configuration (1) and the basic configuration (4) are combined.

When the threshold setting switch 22 of the wireless receiving device 2 is turned on while receiving the radio wave from the wireless transmitting device 1 of the communication partner, the comparison computing unit 23 is activated. The comparison arithmetic unit 23 takes in the incoming radio wave intensity signal 215 from the squelch circuit 210, performs an arithmetic operation, and
2 and a lower limit threshold value of the reception output control corresponding to the radio field intensity. The memory 221 stores the attenuation value and the lower threshold.

Thereafter, each time a radio wave arrives, the comparison calculator 23
Sets the attenuation amount of the variable attenuator 202 according to the attenuation value stored in the memory 221, and in this state, compares the lower limit threshold value stored in the memory 221 with the incoming radio wave intensity signal. By controlling the switch circuit 211 to be turned off when the intensity signal is lower than the threshold value, the output of the baseband signal to the output terminal 213 is determined. In this way, in a state where the variable attenuator 202 is inserted, an incoming radio wave whose incoming radio wave intensity signal is lower than the lower threshold is not received.

FIGS. 5 to 8 show the principle configuration (6) -1 of the present invention.
~ (6) -5. Principle configuration (6) -1 to (6)-
5, a signal generator (OSC) 11 for transmitting a threshold setting signal, a baseband signal input and a threshold, are set in the wireless transmission device 1 in contrast to the above-described principle configurations (1) to (5). And a changeover switch 103 for setting signal input. The wireless receiving apparatus 2 lacks a threshold setting switch 22 and has a signal receiver (SIG) 24 for receiving a threshold setting signal. Is different.

In the wireless transmission device 1, the changeover switch 1
The threshold setting signal is transmitted from the signal generator 11 on the basis of the operation of Step 03, and the wireless receiver 2 detects the threshold setting signal from the baseband signal output of the detector 208 via the signal receiver 24. 5 and 6, the operation of threshold setting in the comparison arithmetic unit 23, which is similar to the case of the above-described principle configuration (1), (3) or (2), is shown in FIG.
In the case of FIG. 8, the operation of setting the amount of attenuation for the variable attenuator 202 and the operation of setting the threshold value in the comparison arithmetic unit 23 are remotely activated, as in the case of the fundamental configurations (4) and (5). The memory 221 stores these threshold values and attenuation values.

Thereafter, every time a radio wave arrives, in the case of FIGS. 5 and 6, the output terminal 213 of the baseband signal is set in the same manner as in the above-described principle configuration (1), (3) or (2). To limit the reception of incoming radio waves, and in the case of FIGS. 5 and 6, the variable attenuator is connected in the same manner as in the above-described principle configurations (4) and (5). In the inserted state, the output of the baseband signal to the output terminal 213 is determined to limit the reception of the incoming radio wave.

The principle configuration shown in FIGS.
In (6) -1 to (6) -5, the embodiment shown in FIGS.
Similarly to (1) to (5), a threshold setting switch 22 may be provided in the wireless receiving device 2 so that the threshold setting operation on the receiving side can be used together.

FIGS. 9 to 12 show the basic configuration (7)-of the present invention.
1 to (7) -5. Principle configuration (7) -1 〜
In (7) -5, the above-mentioned principle configurations (1) to (5) and
In the case of (6) -1 to (6) -5, an example is shown in which the setting of the threshold is periodically updated.

In the case of corresponding to the basic configurations (1) to (5),
The difference is that the wireless reception device 2 is provided with a reception timer 229 as compared with these cases. 9 to 12.
2, the threshold setting switch 22 is omitted. In the wireless receiving device 2, the threshold setting switch 22
By activating the comparison arithmetic unit 23 based on the above operation, in the case of FIGS. 9 and 10, the above-described principle configuration (1),
The operation of setting the threshold value in the comparison arithmetic unit 23 as in the case of (3) or (2) is performed in the case of FIGS. 11 and 12 in the same manner as in the case of the basic configurations (4) and (5). The operation of setting the attenuation amount for the attenuator 202 and the operation of setting the threshold value in the comparison arithmetic unit 23 are started respectively. The memory 221 stores these threshold values and attenuation values.

After that, every time a radio wave arrives, the baseband signal output terminal 213 is used in the case of FIGS. 9 and 10 in the same manner as in the above-described principle configuration (1), (3) or (2). 11 to limit the reception of incoming radio waves, and in the case of FIGS. 11 and 12, the variable attenuator is used in the same manner as in the above-described principle configurations (4) and (5). In the inserted state, the output of the baseband signal to the output terminal 213 is determined to limit the reception of the incoming radio wave.

Receiving timer 229 in radio receiving apparatus 2
Starts by operating the threshold setting switch 22,
It is set to time out within the time interval for setting the threshold on the receiving side. When the reception timer 229 times out, when the lower threshold value is set, the comparison calculator 23 sets the state of the minimum operation incoming radio wave intensity which is an initial value,
That is, the threshold value is returned to the level of the squelch operation threshold value, and in the case of setting the upper limit threshold value, the threshold value is returned to the state of the highest operation incoming radio wave intensity.

In the case of the present invention, when the threshold setting operation by the threshold setting switch 22 is performed on the receiving side, for example, in conjunction with a clock, in accordance with the daily scheduled transmission,
By resetting the threshold setting state every elapse of a predetermined time by the reception timer 229, the setting of the threshold is updated regularly on a daily basis.

Further, when the basic configurations (7) -1 to (7) -5 correspond to the basic configurations (6) -1 to (6) -5, the changeover switch 103 is operated on the radio transmitting apparatus 1. The wireless reception device 2 includes the above-described reception timer 229 in addition to the transmission timer 117 for causing the wireless reception device 2 to perform the transmission.

In the wireless transmission device 1, the transmission timer 11
By operating the changeover switch 103 based on the operation of No. 7,
The signal generator 11 sends a threshold setting signal. In the wireless receiving device 2, by detecting the threshold setting signal via the signal receiver 24 and activating the comparison arithmetic unit 23,
In the case of FIG. 9 and FIG. 10, the above-mentioned principle configuration (6) -1, (6) -3
Alternatively, the operation of setting the threshold value in the comparison arithmetic unit 23 as in the case of (6) -2 is performed in the case of FIGS. 11 and 12 in the same manner as in the case of the theoretical configurations (6) -4 and (6) -5. The operation of setting the attenuation amount for the variable attenuator 202 and the operation of setting the threshold value in the comparison calculator 23 are remotely activated. The memory 221 stores these threshold values and attenuation values.

Thereafter, each time a radio wave arrives, in the case of FIGS. 9 and 10, the base is set in the same manner as in the above-described principle configuration (6) -1, (6) -3 or (6) -2. Band signal output terminal 213
To limit the reception of incoming radio waves, and in the case of FIGS. 11 and 12, the above-described principle configuration (6) -4,
As in the case of (6) -5, the output of the baseband signal to the output terminal 213 is determined with the variable attenuator inserted, so that the reception of the incoming radio wave is restricted.

In the wireless transmission device 1, the transmission timer 11
7, when the threshold setting signal is transmitted periodically, the setting time of the reception timer 229 in the wireless reception device 2 is set to
The time is set slightly longer than the set time interval of the transmission timer 117, and the reception timer 229 is reset by receiving the threshold setting signal to newly count the elapsed time and update the threshold data in the memory 221. I do.

FIGS. 5 to 12 show the principle configuration of the present invention.
(8) is shown. In the basic configuration (8) of the present invention, the basic configurations (6) -1 to (6) -5, (7) -1 to (7) -5 of the present invention
, A function of transmitting a threshold setting signal including a signal for identifying a transmitting station and a signal for variably controlling an operation threshold of the wireless receiving apparatus 2 is added to the signal generator 11 of the wireless transmitting apparatus 1. Further, the wireless transmission device 1 has a function of recording transmission data of a signal for variably controlling an operation threshold value in the wireless reception device 2.

The signal receiver 24 of the radio receiver 2
By providing a function of receiving a signal for variably controlling an operation threshold from the transmission side, the content of the received signal is rewritten in the memory 221 and used as comparison data for controlling the switch circuit 211.

In the principle configuration (8) of the present invention, numerical data for determining the operation threshold value in the radio receiving apparatus 2 is transmitted from the radio transmitting apparatus 1, and the comparison operation unit 23 is used in the radio receiving apparatus 2. A comparison operation is performed based on the received specified value and the reception state information (incoming radio wave intensity signal) to determine an operation threshold.

Further, a variable attenuator 20 is
In the case where the variable attenuator 2 is provided, the setting information of the amount of attenuation is added to the signal for variably controlling the operation threshold value, and the comparison calculator 23 variably controls the amount of attenuation of the variable attenuator 202 based on this information.

FIGS. 1 to 12 also show the principle configuration of the present invention.
(9) is shown. According to the basic configuration (9) of the present invention, in the basic configurations (1) to (5) of the present invention, numerical data for determining an operation threshold value in the wireless receiver 2 can be manually and externally specified. To

Further, in the above-described basic configuration (8) of the present invention, by transmitting a signal from the radio transmitting apparatus 1, numerical data for determining an operation threshold value in the radio receiving apparatus 2 is inputted, and In the device 2, the specified value and the reception state are compared and calculated by the comparison calculator 23 to determine an operation threshold.

As a method of setting the operation threshold in each case of the principle configuration (9), the following various methods can be used alone or in combination. (1) One-touch method (lower threshold setting) (2) One-touch method (attenuation setting) (3) One-touch method (lower threshold and attenuation setting) (4) Absolute value specification method (lower threshold setting) (5) absolute value (6) Variable value specification method (lower threshold setting) (7) Variable value specification method (attenuation setting) (8) Margin specification method 1 (lower threshold setting) (9) Margin specification method 2 (10) Margin specification method 2 (attenuation setting) (11) One-touch method (upper threshold setting) (12) Absolute value specification method (upper threshold setting) (13) Variable value specification method (upper threshold setting) (14) Margin specification method (upper threshold setting) (15) Compound specification method (upper threshold setting)

FIGS. 1 to 12 also show the principle configuration of the present invention.
(10) is shown. In the basic configuration (10) of the present invention, the basic configurations (1) to (5), (6) -1 to (6) -5, and (7)-
In (1) to (7) -5, (8), the value of the incoming operation margin required for determining the operation threshold value for the radio receiving apparatus 2 is automatically set based on the following equation. Maa = K (Lt-Lr) + Mt + Mr

Here, Maa: reception operation margin (dB) K: constant Lt: transmission power of transmission station (dBμ) Lr: communication radio wave intensity (dBμ) Mt: transmission power fluctuation of the other radio transmission apparatus Margin value (d
B) Mr: radio field intensity detection fluctuation margin value of the radio receiver (d
B)

FIG. 13 shows the principle configuration (11) of the present invention. In FIG. 13, the same components as those in each of the above-described drawings are denoted by the same reference numerals. In the wireless transmission device 1, the signal generator 11 includes a selection switch 12, a selection signal generator 13, and a condition signal generator 14.
The wireless receiving device 2 includes a changeover switch 25 and an input switch 26.

In the radio transmitting apparatus 1, the selection switch 1
.., 13N in the selection signal generator 13, and transmits a selection signal corresponding to the category of the received radio wave intensity via the transmitter 104.

In the radio receiving apparatus 2, the selection signal is demodulated by the detector 208, and is divided into respective selection signals via the signal receiver 24 and output. Further, the comparison arithmetic unit 23
Categories A, B,
.., N, the changeover switch 25 is set.
When the division of the received selection signal coincides with the selection of the changeover switch 25, the selection signal is output and the input switch 26 is turned on.

Further, in the radio transmission apparatus 1, the condition signal generator 14
The condition signal generators 14A, 14B,..., 14N are selected to transmit condition data for operating the wireless receiver 2.

The wireless receiving device 2 receives the condition data via the signal receiver 24, inputs the received condition data via the input switch 26 to the comparator 23, and performs signal receiving processing.
It is stored in the memory 221. As a result, the wireless reception device 2 such as the threshold data and the attenuation data of the variable attenuator 202
Are set in accordance with the condition data stored in the memory 221.

In the present invention, the following means are provided corresponding to such a principle configuration.

(1) In a radio receiving apparatus which receives and demodulates a radio wave from a radio transmitting apparatus and controls the output of a demodulated signal via a switch circuit 211, when the radio wave arrives, the signal is received by the arithmetic processing of the comparison arithmetic unit 23. A lower threshold value for the receiving operation according to the radio wave intensity value is generated and stored in the memory 221. Thereafter, the lower limit threshold value stored for each radio wave arrival and the incoming radio wave intensity value are compared and determined by the comparison calculator 23. By controlling the switch circuit 211 to be turned on or off according to the magnitude of the incoming radio wave intensity value and the lower limit threshold value, the operation of receiving unnecessary waves is prevented.

(2) In a radio receiving apparatus which receives and demodulates a radio wave from a radio transmitting apparatus and controls the output of a demodulated signal via a switch circuit 211, when a radio wave arrives, the signal is received by the arithmetic processing of a comparison arithmetic unit 23. An upper limit threshold for the receiving operation according to the radio wave intensity value is generated and stored in the memory 221. Thereafter, the upper limit threshold stored for each incoming radio wave and the incoming radio wave intensity value are compared and determined by the comparison calculator 23. When the incoming radio wave intensity value is equal to or higher than the upper limit threshold, a judgment output is generated. When the incoming radio wave intensity value is equal to or lower than the minimum operating incoming radio wave intensity of the squelch operation of the radio receiving apparatus, a squelch control signal is generated. By controlling the switch circuit 211 to be off or on in accordance with the presence or absence of the output of the logical product of the judgment output and the switch signal obtained by Unnecessary wave reception operation is prevented.

(3) In the radio receiving apparatus which receives and demodulates the radio wave from the radio transmitting apparatus and controls the output of the demodulated signal via the switch circuit 211, when the radio wave arrives, the signal is received by the arithmetic operation of the comparison arithmetic unit 23. A lower limit threshold and an upper limit threshold of the receiving operation according to the radio field intensity value are generated and stored in the memory 22.
1 and thereafter, the lower limit threshold and the upper limit threshold stored for each radio wave arrival and the incoming radio wave intensity value are compared and determined by the comparator 23, and when the incoming radio wave intensity value is equal to or more than the lower threshold value, the upper limit threshold value is obtained. Switch circuit 21 when
1 is turned on, and at other times, the switch circuit 211 is turned off, thereby preventing the operation of receiving unnecessary waves.

(4) A variable attenuator 202 is provided at the reception input,
In a radio receiving apparatus that attenuates a radio wave from a radio transmitting apparatus to receive and demodulate the signal and controls the output of a demodulated signal via a switch circuit 211, when a radio wave arrives, the comparison arithmetic unit 23
The amount of attenuation of the variable attenuator 202 corresponding to the incoming radio wave intensity value is generated and stored in the memory 221 by the arithmetic processing of (1), and thereafter, the amount of attenuation stored for each incoming radio wave is set in the variable attenuator 202. The incoming radio wave intensity value is compared with the lowest operating incoming radio wave intensity value of the squelch operation of the wireless receiver by the comparison calculator 23, and the switch circuit is switched depending on whether the incoming radio wave intensity value is above or below the minimum operating incoming radio wave intensity value. By controlling 211 on or off,
Unnecessary wave reception operation is prevented.

(5) A variable attenuator 202 is provided at the reception input,
In a radio receiving apparatus that attenuates a radio wave from a radio transmitting apparatus to receive and demodulate the signal and controls the output of a demodulated signal via a switch circuit 211, when a radio wave arrives, the comparison arithmetic unit 23
The lower limit threshold value of the receiving operation according to the incoming radio wave intensity value and the attenuation amount of the variable attenuator 202 are generated and stored in the memory 221 by the arithmetic processing of the above, and thereafter, the attenuation amount stored for each incoming radio wave is calculated. By setting the variable attenuator 202,
Comparing arithmetic unit 2 with the stored lower threshold value and the incoming radio wave intensity value
3, the switching operation of the switch circuit 211 is turned on or off in accordance with the magnitude of the incoming radio wave intensity value and the lower limit threshold value, thereby preventing the unnecessary wave receiving operation.

(6) In the cases of (1) to (5), the wireless receiver is provided with a threshold setting switch 22, and each threshold and / or variable attenuator in the comparison arithmetic unit 23 is operated by operating the threshold setting switch 22. The process of generating the amount of attenuation in 202 and storing and storing the generated value in the memory 221 is started.

(7) In the cases of (1) to (5), the radio transmitter is provided with the signal generator 11 to transmit a threshold setting signal, and the radio receiver is provided with the signal receiver 24 and By receiving the setting signal, the processing of generating each threshold value and / or the amount of attenuation of the variable attenuator 202 and storing and storing the generated value in the memory 221 in the comparison arithmetic unit 23 is started.

(8) In the cases of (1) to (5), the radio receiving apparatus is provided with the threshold setting switch 22, and by operating the threshold setting switch 22, the data and / or
Alternatively, by inputting data on which the amount of attenuation of the variable attenuator 202 is specified, the comparison calculator 23 calculates the respective threshold data and / or
Alternatively, an attenuation amount of the variable attenuator 202 is generated, and the generated value is stored in the memory 221.

(9) In the cases of (1) to (5), the signal generator 11 is provided in the radio transmitting apparatus, and the data used as a basis for determining each threshold value and / or the basis for designating the amount of attenuation of the variable attenuator 202 are provided. By transmitting the data to the wireless receiver and providing the wireless receiver with the signal receiver 24 and receiving the data, the comparison calculator 23 calculates the threshold data and / or Or variable attenuator 2
02 is generated, and the generated value is stored in the memory 221.
To be stored.

(10) In the cases of (1) to (5), the signal generator 11 is provided in the radio transmitting apparatus to transmit the data of the calculation condition program of each threshold value and / or the attenuation of the variable attenuator 202. In addition, a signal receiver 24 is provided in the wireless receiving apparatus, and by receiving these data, the comparison arithmetic unit 23 stores the data in the memory 221, and stores the threshold value and / or the attenuation amount of the variable attenuator 202. Is updated.

(11) In the case of (7) or (9), the radio transmission device is provided with a transmission timer 117 for counting a fixed time, and the radio reception device is provided with a reception timer 229 for counting a time longer than the transmission timer. , Threshold setting signal or data and / or variable attenuator 2 on which each threshold is determined
02, the base data for designating the attenuation amount is transmitted at regular intervals, and when the data is received by the wireless receiver, the arithmetic processing of the comparison arithmetic unit 23 and the storage in the memory 221 are started, and the reception timer 229 is activated. Is reset, and when the reception timer finishes counting before the output of the calculation result in the comparison calculator 23, the memory 221
, The lower threshold value is set to the minimum operation incoming radio field intensity value of the squelch operation, the upper limit threshold value is set to a sufficiently large value, and the variable attenuator 202 is stored.
Is updated to zero.

(12) In the case of (1) to (5), (6) to (9), when setting the threshold value in the comparison arithmetic unit 23 and / or the attenuation amount of the variable attenuator 202, the threshold value is determined. The control is performed such that the margin value is reduced when the incoming radio wave intensity value is large, and the margin value is increased when the incoming radio wave intensity value is small.

(13) In the case of (9) or (11), the radio transmitting apparatus is provided with the selection signal generator 13 to transmit the selection signal in which the incoming radio wave intensity value is divided into a plurality of stages,
A condition signal generator 14 is provided to specify each threshold value data and / or attenuation amount data of the variable attenuator 202 or data on which each threshold value is determined and / or the attenuation amount designation of the variable attenuator 202 according to the selected section. The base station sends out the basic data, and the radio receiving apparatus is provided with a changeover switch 25, which selects according to the level of the received radio wave intensity value, and sets the input switch when the division of the received selection signal coincides with the selection of the changeover switch 25. 26 is turned on to receive the condition signal, and the threshold data specified by the condition signal and / or the attenuation amount data of the variable attenuator 202 or the data on which each threshold value is determined and / or the attenuation of the variable attenuator 202 By storing the data in the memory 221 or updating the storage content in accordance with the data on which the amount is specified,
Performs a comparison calculation process according to each incoming radio wave intensity.

[0071]

In the principle configuration (1) of the present invention shown in FIG. 1, while the radio wave of the wireless transmitting device 1 of the communication partner is being received, the threshold setting switch 22 of the wireless receiving device 2 is controlled to be ON to perform the comparison. A start signal for the arithmetic unit 23 is generated. The comparison calculator 23 performs a comparison calculation process based on the incoming radio wave intensity signal 215 from a minimum operation radio field intensity value determined in advance from the performance of the device and a predetermined operation margin value to turn on the switch circuit 211. Is set and stored in the memory 221.

It is assumed that the lower threshold data stored in memory 221 corresponds to a value that is equal to or less than the intensity of the incoming radio wave from the partner wireless transmission device and equal to or more than the minimum operating intensity of the incoming radio wave of the wireless reception device.

Thereafter, every time a radio wave arrives, the radio receiving apparatus 2 compares and compares the stored threshold data with the intensity of the incoming radio wave in the comparison arithmetic unit 23, and processes the incoming radio wave exceeding the lower limit threshold value. Then, the switch circuit 211 is turned on to transmit a demodulated output to the output terminal 213. For an incoming radio wave equal to or smaller than the threshold value, the switch circuit 211 is continuously turned off as an unnecessary radio wave is received.

The threshold data stored in the memory 221 is reset by operating the threshold setting switch 22, and is rewritten and stored again with the latest threshold data.

As a result, it is possible to set a threshold value that meets individual conditions of the wireless receiving device by one-touch operation of the threshold setting switch 22, and to receive an unnecessary incoming radio wave lower than the incoming radio wave intensity from the other radio transmitting device. Since the operation can be eliminated, a wireless communication system resistant to interference can be constructed.

In the basic configuration (2) of the present invention shown in FIG. 2, while the radio wave of the radio transmission device 1 of the communication partner is being received, the threshold setting switch 22 of the radio reception device 2 is turned on to perform the comparison. A start signal for the arithmetic unit 23 is generated. The comparison calculator 23 performs a comparison calculation process based on the incoming radio wave intensity signal 215 from a minimum operating radio wave intensity value determined in advance from the performance of the device and a line fluctuation margin value, and turns on the switch circuit 211. Is set and stored in the memory 221.

Thereafter, every time a radio wave arrives, the radio receiving apparatus 2 sets the control signal of the squelch operation having the minimum operating radio field intensity determined in advance from the performance of the apparatus as the lower limit threshold value and the upper limit threshold value of the comparison arithmetic unit 23. The switch circuit 21 is turned on by the satisfaction of the logical product condition with the control output when the incoming radio wave is detected.
By turning off 1, the demodulated output to the output terminal 213 is muted to eliminate unnecessary incoming calls.

The threshold data stored in the memory 221 is reset by operating the threshold setting switch 22, and is rewritten and stored again with the latest threshold data.

As a result, it is possible to set a threshold value that meets the individual conditions of the radio receiving apparatus by one-touch operation of the threshold setting switch 22, and to set an unnecessary incoming radio wave higher than the incoming radio wave intensity from the other radio transmitting apparatus, Since the operation of receiving unnecessary incoming radio waves lower than the squelch operation limit can be eliminated, it is possible to construct a radio communication system resistant to interference.

In the basic configuration (3) of the present invention shown in FIG. 1, while the radio wave of the radio transmission device 1 of the communication partner is being received, the threshold setting switch 22 of the radio reception device 2 is turned on to control the comparison. A start signal for the arithmetic unit 23 is generated. The comparison calculator 23 performs a comparison calculation process based on the incoming radio wave intensity signal 215 and the line fluctuation margin value, and stores lower limit threshold data and upper limit threshold data for turning on the switch circuit 211 in the memory 221. .

Thereafter, each time radio wave arrives, the radio receiving apparatus 2 performs comparison operation processing on the stored threshold data and the incoming radio wave intensity in the comparison arithmetic unit 23 to exceed the lower limit threshold and lower than the upper limit threshold. The switch circuit 211 is turned on with respect to the incoming radio wave, and a demodulated output is transmitted to the output terminal 213. In addition, for incoming radio waves below the lower threshold and above the upper threshold, the switch circuit 211 is continuously turned off as the arrival of unnecessary radio waves.

The threshold data stored in the memory 221 is reset by operating the threshold setting switch 22, and is rewritten and stored again with the latest threshold data.

Thus, the threshold setting of the lower limit and the upper limit that meet the individual conditions of the radio receiving apparatus is performed by the threshold setting switch 2
2 can be performed by one-touch operation, and an unnecessary incoming radio wave lower than the incoming radio wave intensity from the partner wireless transmission device,
Since the receiving operation of the unnecessary incoming radio wave higher than the incoming radio wave intensity can be eliminated, a radio communication system resistant to interference can be constructed.

In the principle configuration (4) of the present invention shown in FIG. 3, while the radio wave of the wireless transmission device 1 of the communication partner is being received, the threshold setting switch 22 of the wireless reception device 2 is turned on to perform the comparison. A start signal for the arithmetic unit 23 is generated. The comparison calculator 23 calculates the variable attenuator 202 from the incoming radio wave intensity signal 215 so that a predetermined S / N can be secured based on the operation margin at the minimum operating radio wave intensity value predetermined as the operation limit of the squelch circuit. Control the amount of attenuation. The attenuation of the variable attenuator 202 is retained even after the reception radio wave stops.

Thereafter, the radio receiving apparatus 2 is controlled by the variable attenuator 20
In the state attenuated by the switching circuit 21, only the incoming radio wave exceeding the operation threshold of the squelch circuit 210 is
The reception state is set by the ON control of 1.

The attenuation of the variable attenuator 202 stored in the memory 221 is reset by operating the threshold setting switch 22, and the latest attenuation is held again.

As a result, it is possible to perform a one-touch operation to set a threshold value that meets the individual conditions of the wireless receiving device, to eliminate unnecessary incoming radio waves lower than the incoming radio wave intensity from the partner radio transmitting device and to set a strong power. It is possible to construct a wireless communication system that eliminates the influence of intermodulation waves due to different frequency signals and is resistant to sensitivity suppression interference.

In the principle configuration (5) of the present invention shown in FIG. 4, while the radio wave of the wireless transmission device 1 of the communication partner is being received, the threshold setting switch 22 of the wireless reception device 2 is controlled to be turned on. A start signal for the arithmetic unit 23 is generated. The comparison calculator 23 performs a comparison calculation process based on the incoming radio wave intensity signal 215 and the line fluctuation margin value to determine lower limit threshold data for turning on the switch circuit 211 and attenuation of the variable attenuator 202. decide.

Then, the lower threshold data and the variable attenuator 20
2 is stored in the memory 221 and these values are retained even after the reception radio wave is stopped.

Thereafter, the radio receiving apparatus 2 is controlled by the variable attenuator 20
In the state attenuated by 2, only the incoming radio wave exceeding the lower threshold is turned on to control the switch circuit 211 to be in the receiving state, and the incoming radio wave below the lower threshold is kept off.

The lower threshold and the attenuation of the variable attenuator 202 stored in the memory 221 are reset by operating the threshold setting switch 22, and the latest lower threshold data and the attenuation of the variable attenuator 202 are again updated. Hold.

Thus, it is possible to perform a one-touch operation to set a threshold value that meets the individual conditions of the wireless receiving device, to eliminate unnecessary incoming radio waves lower than the incoming radio wave intensity from the partner radio transmitting device, and to set a strong power. It is possible to construct a wireless communication system that eliminates the influence of intermodulation waves due to different frequency signals and is resistant to sensitivity suppression interference.

In the basic constructions (6) -1 to (6) -5 of the present invention shown in FIGS. 5 to 8, in the radio transmitting apparatus 1, the operation of the changeover switch 103 causes the signal generator 1 to operate.
The threshold setting signal from 1 is transmitted via the transmitter 104. In the wireless receiving device 2, the signal receiver 24 detects the threshold setting signal from the wireless transmitting device 1 of the communication partner, and thereby activates the comparator 23. The wireless transmission device 1
After transmitting the threshold setting signal, by continuing the transmission for a certain period of time, the wireless receiving apparatus 2 measures the incoming radio wave intensity, stores each threshold data in the memory 221, and has the attenuator 202. , The required attenuation for the variable attenuator 202 is set.

Note that the threshold data stored in the memory 221 and the data of the amount of attenuation of the variable attenuator 202 are
Next, the threshold value is reset by receiving the threshold setting signal, the latest threshold data is stored again, and the attenuation of the variable attenuator 202 is held.

By doing so, the threshold setting operation at the installation location of each wireless receiver is not required.

In the basic configurations (7) -1 to (7) -5 of the present invention shown in FIG. 9 to FIG.
If the threshold setting signal has not been received from the wireless transmission device 1 even after the predetermined threshold setting time has elapsed, the reception timer 22
At the end of the set time of 9, a reset signal is sent to the comparison arithmetic unit 23, the threshold data stored in the memory 221 is released, and the threshold value of the wireless receiving device 2 is returned to the minimum operation incoming radio field intensity value.

Thereafter, by receiving the threshold setting signal from the radio transmitting apparatus 1, the basic configuration (1) to (5), (6) -1 to
According to the function of (6) -5, it becomes possible to operate with a new optimal threshold.

[0098] Thereby, in the radio transmitting apparatus 1,
Even in the case of an unexpected decrease in the transmission level, a change in the radio wave propagation conditions, a decrease in the reception sensitivity of the wireless receiving device 2, and the like, the reception cannot be performed due to the threshold value set by the wireless receiving device 2. However, this can be avoided automatically after the set time of the reception timer 229.

In the principle configuration (8) of the present invention shown in FIGS. 9 to 12, a predetermined operation threshold value of the radio receiving apparatus is determined in accordance with the installation state of the radio receiving apparatus 2. Is transmitted from the wireless transmission device 1, in the wireless reception device 2, the comparison calculation unit 23 performs a comparison calculation process on the basis of the received designated value and the reception state information (the incoming radio wave intensity signal 215). In addition, when the operation threshold value can be determined, and the wireless receiving apparatus 2 includes the variable attenuator 202, the comparison operation unit can be added to the signal for variably controlling the operation threshold value by adding attenuation setting information. 23 can variably control the amount of attenuation of the variable attenuator 202 based on this information.

In the basic configuration (9) of the present invention shown in FIGS. 1 to 12, the basic configurations (1) to (5) of the present invention are shown.
In, the numerical data of the condition value for determining the operation threshold value in the wireless receiving device 2 can be manually specified from the outside.

Also, in the basic configuration (8) of the present invention, by transmitting a signal from the radio transmitting apparatus 1, numerical data for determining an operation threshold value in the radio receiving apparatus 2 is input. , The comparison operation unit 23 performs a comparison operation processing on the designated value and the information on the reception state,
An operating threshold can be determined.

As a method of setting the operation threshold value in each case of the basic configuration (9) of the present invention, the following various methods can be used alone or in combination. Hereinafter, the following symbols are used. Lmin: Minimum operating incoming radio wave intensity value (dBμ) Lr: Communication opponent transmitting wave incoming radio wave intensity value (dBμ) Lra: Opponent transmitting wave incoming radio wave intensity value after passing through the variable attenuator 202 (dBμ) Ma: Incoming operating margin (fixed) (DB) Maa: Incoming operation margin (automatically variable) (dB) Lz: Absolute value specification level (dBμ) Mb: Margin specification value (dB) Mt: Transmission output fluctuation margin value of partner wireless transmission device (dB) Mr: Radio wave intensity detection fluctuation margin value of radio receiver (dB) Lv: Variable value designation level (dB) At: Attenuation amount of variable attenuator 202 (dB) Atp: Previous attenuation amount of variable attenuator 202 (dB) Lat: Incoming incoming radio wave intensity value of insertion of variable attenuator 202 (dBμ) Lsl: Determined value of lower threshold (dBμ) Lsu: Determined value of upper threshold (dBμ) Lpl: Previous lower threshold (dBμ) Lpu: Previous upper threshold (dBμ) Lt: Transmission output of radio transmitter (dBμ) K: Constant Lo: Received radio field intensity information

FIGS. 14 to 23 show the incoming radio wave intensity and the detection characteristics (1) to (10), respectively. Hereinafter, a method of setting the operation threshold will be described with reference to these drawings.

(1) One-Touch Designation Method (Setting of Lower Threshold) FIG. 14 shows the incoming radio wave intensity and detection characteristics in this case. The comparison arithmetic unit 23 has a table for replacing the detection characteristic with poor linearity with the incoming radio wave intensity, and sets a lower threshold value in a range from the radio wave intensity value Lmin to the communication partner transmission wave incoming radio wave intensity value Lr in consideration of a predetermined margin. Has a function to set.

Then, a one-touch signal is sent from the outside by a key operation or from the wireless transmitting device 1 via a wireless line, and based on the incoming radio wave intensity value Lr of the communication partner and the minimum operating incoming radio wave intensity value Lmin. The threshold value is set by performing a comparison operation using the following equation by the processing of the comparison arithmetic unit 23. When (Lr-Ma) ≧ Lmin, Lsl = Lr-Ma (1) When (Lr-Ma) <Lmin, Lsl = Lmin (2)

In the radio receiving station, the incoming radio wave intensity is Lsl
Is exceeded, the switch circuit 211 is turned on, and the receiving operation is performed.

(2) One-touch Designation Method (Attenuation Setting) FIG. 15 shows the incoming radio wave intensity and detection characteristics in this case. The comparison arithmetic unit 23 has a table for replacing the detection characteristic having poor linearity with the received radio wave intensity, and a variable attenuator in a range from the radio wave intensity value Lmin to the communication partner transmitted wave incoming radio wave intensity value Lr in consideration of a predetermined margin. It has a function of setting the amount of attenuation of 202.

Then, a one-touch signal is sent from the outside by a key operation or from the wireless transmission device 1 via a wireless line, and the incoming radio wave intensity value Lr of the communication partner transmission wave and the incoming radio wave intensity value at the start of insertion of the variable attenuator 202 are received. Based on Lat, a comparison operation is performed by the following equation by the processing of the comparison operation unit 23 to set the attenuation amount. If (Lr-Ma) ≥Lat, At = (Lr-Ma) -Lat (3) If (Lr-Ma) <Lat, At = 0 ... (4)

In the radio receiving station, when the incoming radio wave intensity value Lra of the other party transmitted wave after passing through the variable attenuator 202 exceeds the minimum operation incoming radio wave intensity value Lmin, the switch circuit 211 is turned on to perform a receiving operation. Note that the insertion start incoming radio field intensity value Lat of the variable attenuator 202 is set to a value larger than the minimum operation incoming radio field intensity value Lmin.

(3) One-touch designation method (setting of lower threshold and attenuation) A one-touch signal is transmitted from the outside by a key operation or from the wireless transmission device 1 via a wireless line, and the incoming radio wave intensity value Lr of the transmission wave of the communication partner is transmitted. , Minimum operating incoming radio field intensity value L
Based on min, a comparison operation by the following equation is performed by the processing of the comparison operation unit 23, and the attenuation amount of the variable attenuator 202 and
Set the lower threshold. At (Lr-Ma) ≥Lat At = (Lr-Ma) -Lat (5) At (Lr-Ma) <Lat At = 0 ... (6) When (Lr-Ma) ≥Lmin Lsl = Lra-Ma (7) When (Lr-Ma) <Lmin, Lsl = Lmin (8)

In the radio receiving station apparatus, when the incoming radio wave intensity value Lra of the partner transmission wave after passing through the variable attenuator 202 exceeds the determined value Lsl of the lower threshold, the switch circuit 211 is turned on to perform the receiving operation.

(4) Absolute Value Designation Method (Setting of Lower Threshold) The incoming radio wave intensity and detection characteristics in this case are shown in FIG. The comparison calculator 23 has a table that replaces the detection characteristic having poor linearity with the incoming radio wave intensity, and has a function of setting a lower limit threshold in a range from the radio wave intensity value Lmin to the communication partner transmission wave incoming radio wave intensity value Lr. .

Then, the Lz value is transmitted as an absolute value designation signal from the outside by a key operation or from the wireless transmission device 1 via a wireless line, and a comparison operation by the following formula is performed by the processing of the comparison arithmetic unit 23. Set the threshold. When (Lr-Ma) ≧ Lz ≧ Lmin, Lsl = Lz (9) When Lz> (Lr-Ma), Lsl = Lr-Ma (10) When Lz <Lmin, Lsl = Lmin (11) )

In the radio receiving station device, the incoming radio wave intensity is Lsl
Is exceeded, the switch circuit 211 is turned on, and the receiving operation is performed.

(5) Absolute Value Designation Method (Attenuation Setting) FIG. 15 shows the incoming radio wave intensity and detection characteristics in this case. The comparison arithmetic unit 23 has a table for replacing the detection characteristic having poor linearity with the received radio wave intensity, and a variable attenuator in a range from the radio wave intensity value Lmin to the communication partner transmitted wave incoming radio wave intensity value Lr in consideration of a predetermined margin. It has a function of setting the amount of attenuation of 202.

Then, the Lz value is transmitted as an absolute value designation signal from the outside by a key operation or from the wireless transmission device 1 via a wireless line, and a comparison operation by the following formula is performed by the processing of the comparison arithmetic unit 23. Set the amount of attenuation. If (Lr-Ma) ≧ Lz ≧ Lat, then At = Lz−Lat (12) if Lz> (Lr-Ma), then At = Lsl−Lat (13) if Lz <Lmin, then At = 0. (14)

In the radio receiving station apparatus, when the incoming radio wave intensity value Lra of the other party transmitted wave after passing through the variable attenuator 202 exceeds the minimum operating incoming radio wave intensity value Lmin, the switch circuit 211 is turned on to perform a receiving operation.

(6) Variable Value Designation Method (Setting of Lower Threshold) FIG. 16 shows the incoming radio wave intensity and detection characteristics in this case. The comparison arithmetic unit 23 has a table for replacing the detection characteristic with poor linearity with the incoming radio wave intensity, and sets a lower threshold value in a range from the radio wave intensity value Lmin to the communication partner transmission wave incoming radio wave intensity value Lr in consideration of a predetermined margin. Has a function to set.

Then, a ± Lv value is sent from the outside by a key operation or from the wireless transmitting device 1 via a wireless line as a variable value designating signal to the previous lower limit threshold value Lpl value. A threshold value is set by performing a comparison operation using the following equation. When (Lr-Ma) ≧ (Lpl ± Lv) ≧ Lmin, Lsl = Lpl ± Lv (15) When (Lpl ± Lv)> (Lr-Ma), Lsl = Lr-Ma (16) (Lpl Lsl = Lmin when ± Lv) <Lmin (17)

[0120] In the radio receiving station device, the incoming radio wave intensity is Lsl.
Is exceeded, the switch circuit 211 is turned on, and the receiving operation is performed.

(7) Variable Value Designation Method (Attenuation Setting) FIG. 17 shows the incoming radio wave intensity and detection characteristics in this case. The comparison arithmetic unit 23 has a table for replacing the detection characteristic having poor linearity with the received radio wave intensity, and a variable attenuator in a range from the radio wave intensity value Lmin to the communication partner transmitted wave incoming radio wave intensity value Lr in consideration of a predetermined margin. It has a function of setting the amount of attenuation of 202.

Then, ± Lv value is sent as a variable value designation signal for the last lower threshold value Lpl value from the outside by a key operation or from the wireless transmission device 1 via a wireless line, and the comparison arithmetic unit 23 processes A comparison operation is performed by the following formula to set the attenuation amount. If (Lr-Ma) ≧ (Lpl ± Lv) ≧ Lat, At = Atp ± Lv (18) If (Lpl ± Lv)> (Lr-Ma), At = Lsl−Lat (19) (Lpl If ± Lv) <Lat, At = 0 (20)

In the radio receiving station device, when the incoming radio wave intensity value Lra of the other party transmitted wave after passing through the variable attenuator 202 exceeds the minimum operating incoming radio wave intensity value Lmin, the switch circuit 211 is turned on to perform a receiving operation. .

(8) Margin Designation Method 1 (Setting of Lower Threshold) The incoming radio wave intensity and detection characteristics in this case are shown in FIG. The comparison arithmetic unit 23 has a table for replacing the detection characteristic with poor linearity with the incoming radio wave intensity, and sets a lower threshold value in a range from the radio wave intensity value Lmin to the communication partner transmission wave incoming radio wave intensity value Lr in consideration of a predetermined margin. Has a function to set.

Then, Mb is output as a margin designating signal to the minimum operating incoming radio wave intensity value Lmin from the outside by a key operation or from the radio transmitting apparatus 1 via a radio line.
The value is sent, and the threshold value is set by performing a comparison operation using the following equation by the processing of the comparison operation unit 23. When (Lr−Ma) ≧ (Lmin + Mb), Lsl = Lmin + Mb (21) When (Lr−Ma) <(Lmin + Mb), Lsl = Lr−Ma (22)

In the radio receiving station apparatus, when the incoming radio wave intensity value Lr of the communication partner exceeds the lower limit threshold value Lsl,
The switch circuit 211 is turned on, and the receiving operation is performed.

(9) Margin Designation Method 2 (Setting of Lower Threshold) The incoming radio wave intensity and detection characteristics in this case are shown in FIG. The comparison arithmetic unit 23 has a table for replacing the detection characteristic with poor linearity with the incoming radio wave intensity, and sets a lower threshold value in a range from the radio wave intensity value Lmin to the communication partner transmission wave incoming radio wave intensity value Lr in consideration of a predetermined margin. Has a function to set.

Then, the Mb value is sent as a margin designation signal for the Lr value from the outside by a key operation or from the wireless transmission device 1 via a wireless line, and the comparator 2
The threshold value is set by performing a comparison operation using the following formula by the process of No. 3. When (Lr-Ma) ≥ (Lr-Mb) ≥Lmin, Lsl = Lr-Mb (23) When (Lr-Mb)> (Lr-Ma), Lsl = Lr-Ma (24) (Lr −Mb) <Lmin, Lsl = Lmin (25)

In the radio receiving station apparatus, when the incoming radio wave intensity value Lr of the communication partner exceeds the lower limit threshold value Lsl,
The switch circuit 211 is turned on, and the receiving operation is performed.

(10) Margin Designation Method 2 (Attenuation Setting) FIG. 20 shows the incoming radio wave intensity and detection characteristics in this case. The comparison arithmetic unit 23 has a table for replacing the detection characteristic having poor linearity with the received radio wave intensity, and a variable attenuator in a range from the radio wave intensity value Lmin to the communication partner transmitted wave incoming radio wave intensity value Lr in consideration of a predetermined margin. It has a function of setting the amount of attenuation of 202.

Then, the Mb value is sent as a margin designation signal for the Lr value from the outside by a key operation or from the wireless transmission device 1 via a wireless line,
A comparison operation is performed by the following formula by the process of 3 to set the attenuation amount. If (Lr-Ma) ≥ (Lr-Mb) ≥Lat, At = Lsl-Lat (26) If (Lr-Mb)> (Lr-Ma), At = Lsl-Lat (27) (Lr -Mb) <Lat, At = 0 (28)

In the radio receiving station apparatus, when the reception radio wave intensity value Lra of the other party after passing through the variable attenuator 202 exceeds the minimum operation radio wave intensity value Lmin, the switch circuit 211 is turned on to perform the reception operation. .

(11) One-touch designation method (upper limit threshold setting) FIG. 21 shows the incoming radio wave intensity and detection characteristics in this case. The comparison arithmetic unit 23 has a table for replacing the detection characteristic having poor linearity with the incoming radio wave intensity, and sets an upper limit threshold in a range from the radio wave intensity value Lmin to the communication partner transmitted wave incoming radio wave intensity value Lr in consideration of a predetermined margin. Has a function to set.

Then, a one-touch signal is transmitted from the outside by a key operation or from the wireless transmission device 1 via a wireless line, and the processing of the comparison arithmetic unit 23 causes the incoming radio wave intensity value Lr of the communication partner to be transmitted and the minimum operation incoming signal. Radio field intensity value L
Based on min, a threshold value is set by performing a comparison operation using the following equation. When (Lr + Ma) ≧ Lmin, Lsu = Lr + Ma (29) When (Lr + Ma) <Lmin, Lsu = Lmin (30)

In the radio receiving station apparatus, when the incoming radio wave intensity value Lr of the communication partner is less than the upper limit threshold value Lsu, the switch circuit 211 is turned on and the receiving operation is performed.

(12) Absolute value designation method (upper threshold setting) FIG. 21 shows the incoming radio wave intensity and detection characteristics in this case. The comparison arithmetic unit 23 has a table for replacing the detection characteristic having poor linearity with the incoming radio wave intensity, and sets an upper limit threshold in a range from the radio wave intensity value Lmin to the communication partner transmitted wave incoming radio wave intensity value Lr in consideration of a predetermined margin. Has a function to set.

Then, the Lz value is sent as an absolute value designation signal from outside by a key operation or from the wireless transmission device 1 via a wireless line. , And a threshold value is set by performing a comparison operation by the following formula based on the minimum operation incoming radio wave intensity value Lmin. When (Lr + Ma) ≧ Lz, Lsu = Lz (31) When (Lr + Ma) <Lz, Lsu = Lr + Ma (32)

In the radio receiving station apparatus, when the incoming radio wave intensity value Lr of the communication partner is less than the upper limit threshold value Lsu, the switch circuit 211 is turned on to perform a receiving operation.

(13) Variable value designating method (upper threshold setting) FIG. 22 shows the incoming radio wave intensity and detection characteristics in this case. The comparison calculator 23 has a table for replacing the detection characteristic having poor linearity with the incoming radio wave intensity, and has a function of setting an upper limit threshold in a range from the radio wave intensity values Lmin to Lr in consideration of a predetermined margin.

Then, ± Lv value is sent as a variable value designation signal to the previous upper limit threshold Lpu from the outside by a key operation or from the wireless transmission device 1 via a wireless line,
By the processing of the comparison arithmetic unit 23, a comparison operation is performed by the following equation to set a threshold value. When (Lr + Ma) ≦ (Lpu ± Lv), Lsu = Lpu ± Lv (33) When (Lr + Ma)> (Lpu ± Lv), Lsu = Lr + Ma (34)

In the radio receiving station apparatus, when the incoming radio wave intensity value Lr of the communication partner is less than the upper limit threshold value Lsu, the switch circuit 211 is turned on and the receiving operation is performed.

(14) Margin Designation Method (Setting of Upper Threshold) FIG. 23 shows the incoming radio wave intensity and detection characteristics in this case. The comparison arithmetic unit 23 has a table for replacing the detection characteristic having poor linearity with the incoming radio wave intensity, and sets an upper limit threshold in a range from the radio wave intensity value Lmin to the communication partner transmitted wave incoming radio wave intensity value Lr in consideration of a predetermined margin. Has a function to set.

Then, the Mb value is sent as a margin designating signal to the communication partner transmitted wave incoming radio wave intensity value Lr from the outside by a key operation or from the wireless transmission device 1 via a wireless line, and the comparison arithmetic unit 23 processes the Mb value. The amount of attenuation is set by performing a comparison operation using the following mathematical expression. When (Lr + Ma) ≦ (Lr + Mb), Lsu = Lr + Mb (35) When (Lr + Ma)> (Lr + Mb), Lsu = Lr + Ma (36)

In the radio receiving station apparatus, when the incoming radio wave intensity value Lr of the communication partner is less than the upper limit threshold value Lsu, the switch circuit 211 is turned on and the receiving operation is performed.

(15) Compound Designation Method (Lower Threshold, Upper Threshold) FIG. 24 shows the relationship between the incoming radio wave intensity and the lower and upper thresholds. In the wireless transmission device 1, from the above (1)
The designated signal according to any one of the lower threshold setting methods up to (10), and the designated signal according to any of the upper threshold setting methods according to (11) to (14), from the outside by a key operation, or a wireless transmission device Sent from 1 via a wireless line.

In the radio receiving apparatus 2, the comparison operation unit 23
It has a table that replaces the detection characteristic with poor linearity with the incoming radio wave intensity, performs a comparison operation, and determines the lower limit threshold value L
It has a function to perform a receiving operation only on radio waves of the incoming radio wave intensity in the range of the determined value Lsu of the upper threshold from sl, and to exclude the reception of radio waves outside this range.

In the principle configuration (10) of the present invention shown in FIGS. 1 to 12, the incoming operation margin is automatically replaced with the fixed margin Ma, and the incoming operation margin value according to the radio channel condition is automatically set. By determining, a threshold value with higher accuracy can be set.

The comparison operation unit 23 of the radio receiving apparatus 2 performs the comparison operation of the following equation described in the explanation of the principle configuration (10) in the means for solving the above-mentioned problem, and performs the incoming operation according to the incoming radio wave intensity. A margin value is determined, and threshold value setting or attenuation amount setting processing of the variable attenuator 202 is performed.

Maa = K (Lt-Lr) + Mt + Mr (37) Here, Maa, K, Lt, Mt, and Mr have already been described in the description of the principle configuration (10).

The principle configuration (11) of the present invention shown in FIG.
, The wireless receiving device 2 classifies the incoming radio wave intensity value Lr of the communication partner transmission wave from the communication partner wireless transmission device into several intensity widths A, B,. Comparison arithmetic unit 2
3 is a changeover switch 2 according to the category of the received radio wave intensity value.
5 is set by switching.

Radio transmitting apparatus 1 includes a signal generator 11 having a selection switch 12 corresponding to a category of an incoming radio wave intensity value.
, N are set to A, B,..., N sequentially, so that a selection signal is generated from any of the selection signal generators 13A, 13B,. To transmit as a modulated wave. In the wireless receiving device 2, the selection signal is detected by the signal receiver 24 from the signal that has been received and detected and demodulated by the detector 208. If the received selection signal matches the category of the incoming radio wave intensity value of the wireless receiving device 2, the input switch 26 is turned on via the changeover switch 25.

The radio transmitting apparatus 1 is set or switched sequentially by the selection switch 12 to receive the radio receiving apparatus 2 from any of the condition signal generators 14A, 14B,... Of condition data. In the wireless receiver 2, the signal receiver 2
In step 4, the condition data is demodulated and input to the comparison arithmetic unit 23 via the input switch 26 during the ON operation, and after performing signal reception processing, is stored in the memory 221. The wireless receiving device 2 operates according to the condition data stored in the memory 221.

According to the present invention, for example, transmission of threshold data and attenuation data of the variable attenuator 202 or transmission of arithmetic processing condition expressions and constant values of the radio receiving apparatus 2 according to the radio field intensity can be performed. Become.

[0154]

Embodiments of the present invention will be described below in detail with reference to FIGS. In these figures, the same reference numerals indicate the same or corresponding parts.

FIG. 25 shows an example of the configuration of a radio communication system suitable for implementing the method of the present invention, wherein 1a is a radio transmission station (T), 2a, 2b, 2c,. The station (R) is shown, and 1b is another radio transmitting station (T) that causes interference in this radio communication system.

As shown in FIG. 25, the radio transmitting station 1a and each radio receiving station 2a, 2b, 2c,..., 2n are connected by radio waves indicated by solid lines. Each radio receiving station 2a, 2b,
, 2n have the same configuration.

Now, when transmitting from the radio transmitting station 1a, the transmitted radio wave is transmitted to each of the radio receiving stations 2a, 2b, 2c,.
For example, when the radio transmitting station 1b using the same frequency transmits, this radio wave is transmitted to each radio receiving station 2b.
a, 2b, 2c,..., 2n.

In the case of receiving radio waves of the same frequency from different radio transmitting stations, if the incoming level U of the interfering wave is lower than the incoming level D of the desired wave and a predetermined D / U ratio is secured, the interfering wave is Communication is enabled by being suppressed by the desired wave.

However, when the radio transmitting station 1b pauses transmission and the radio transmitting station 1b transmits, the radio receiving stations 2a, 2b, 2c,..., 2n are connected to the squelch circuit of the receiving apparatus. In the above, the reception operation threshold value is set to the best sensitivity point, so that the reception operation of the interference wave is performed.

Therefore, it is necessary to change the incoming call operation threshold value from the setting of the best sensitivity point so that incoming of radio waves having a strength lower than the incoming radio wave intensity from the communication partner station can be excluded.

When the radio transmitting station 1b that generates the interference wave is a mobile station, the radio transmitting station 1b is connected to each of the radio receiving stations 2a and 2a.
When the signal is moved to the vicinity of b, 2c,..., 2n and transmitted, the intensity of the incoming radio wave becomes larger than that of the radio wave transmitted from the radio transmitting station 1a which transmits the desired wave.

That is, the D / U ratio indicating the difference between the level of the desired wave D and the level of the interfering wave U deteriorates, so that the radio wave of the desired wave cannot be demodulated and the radio wave of the interfering wave is demodulated and output. Become so.

Therefore, in such a case, it is desirable to be able to eliminate the incoming call even when the radio wave is stronger than the incoming radio wave from the communication partner radio transmitting station.

FIG. 26 shows a radio receiving apparatus according to the embodiment (1) of the present invention. The configuration of the radio receiving apparatus 2 is shown by a block diagram, and 201 is a receiving antenna.
203 is a high frequency amplifier (RFA), 204 is a mixer (M
IX), 205 is a local oscillator (LO), 206 is a band-pass filter (BPF), and 207 is an intermediate frequency amplifier (IF).
A), and these constitute a radio frequency section (RF section) 20. 208 is a detector (DT), 210 is a squelch circuit (SQ), 211 is a switch circuit (SW),
212 is a baseband amplifier (LFA), 213 is a baseband signal output terminal, and 220 is a central processing unit (CP
U), 221 is a memory (MEM), 222 is a console, 223 is an analog / digital (A / D) converter, 2
25 is an output port of the CPU 220, 228 is a CPU 22
0 is a common bus. Note that the memory 221 is a rewritable nonvolatile storage device.

In the embodiment (1), when the radio receiving apparatus 2 performs normal communication, an incoming signal is guided to the high-frequency amplifier 203 and amplified by receiving the radio wave by the receiving antenna 201, After being mixed with the local oscillation signal of the local oscillator 205, it is converted to the intermediate frequency fi, band-limited by the band-pass filter 206, amplified by the intermediate frequency amplifier 207, detected by the detector 208, and Demodulated into a signal.

Further, in the squelch circuit 210, the noise component is detected from the detection output, the incoming radio wave intensity is detected in the intermediate frequency amplifier 207, and the detected signal is supplied to the squelch circuit 210 as the carrier wave intensity signal 209. From the incoming signal strength signal 2
15 generates radio wave intensity information Lo and converts it into a digital signal via an A / D converter 223.

On the other hand, by connecting the memory 221, the console 222 and the output port 225 via the common bus 228, the CPU 220 performs a predetermined operation according to a program stored in the memory 221.

When a threshold setting operation is performed on the console 222, the CPU 220 is started by this operation, and A
It instructs the / D converter 223 to capture the radio wave intensity information.

Then, the radio field intensity information fetched via the A / D converter 223 is converted into an incoming radio field intensity value using a conversion table stored in the memory 221, and a pre-set operation formula, For example, the lower limit threshold for the mute control is automatically determined according to the above-described equations (1) and (2) and stored in the memory 221.

Thereafter, based on the threshold value for mute control stored in the memory 221, the current radio field intensity information Lo is stored.
And a control signal is generated from the output port 225 according to the comparison result to control the switch circuit 211.

When the lower limit threshold is used as the threshold, when the radio field intensity information is equal to or greater than the threshold, the switch circuit 211 is turned on to output the baseband signal from the baseband amplifier 212 to the terminal 213. When the radio field intensity information is less than the threshold, the switch circuit 21
The baseband signal is not output to the terminal 213 by always controlling the baseband signal 1 to be off.

By doing so, it is possible to prevent the operation of receiving an unnecessary wave lower than the incoming radio field intensity value Lr from the wireless transmission station of the communication partner.

FIG. 27 shows an example of a circuit configuration for detecting the intensity of an incoming radio wave, and shows a circuit configuration of the embodiment in the intermediate frequency amplifier 207 and the squelch circuit 210.

In the intermediate frequency amplifier 207, reference numeral 231 denotes a preceding intermediate frequency amplifier, reference numeral 232 denotes a subsequent intermediate frequency amplifier,
33 is a coupling capacitor, 234 is a rectifier diode, 23
5 and 237 are smoothing capacitors, and 236 is a smoothing resistor.

In the squelch circuit 210, 241 is a high-pass filter, 242 is a noise amplifier, 243 is a coupling capacitor, 244 is a rectifier diode, 245 and 24
7 is a smoothing capacitor, 246 is a smoothing resistor, 248
Is a level converter, 249 is a comparator, and 250 is a threshold circuit of a squelch circuit.

Reference numeral 208 denotes a detector (DT), 209 denotes a carrier intensity signal, 215 denotes an incoming radio wave intensity signal, and 216 denotes a squelch control signal.

FIG. 28 exemplifies the detection characteristics of the incoming radio wave intensity detection circuit.
4, Ln is a noise intensity characteristic based on a noise output at the output of the rectifier diode 244, and Lm is a combined characteristic of the characteristic Li and the characteristic Ln. Lo is radio wave intensity information obtained by level-converting the characteristic Lm, and corresponds to the incoming radio wave intensity signal 215.

The received radio wave is converted into the intermediate frequency fi, amplified by the preceding intermediate frequency amplifier 231, further amplified by the latter intermediate frequency amplifier 232, sent to the detector 208, and demodulated into a baseband signal. A part of the intermediate frequency signal is extracted from a point where the intermediate frequency signal is unsaturated via a coupling capacitor 233, rectified by a rectifier diode 234 to extract a DC component, and a capacitor 235, a resistor 23
6, an output of the radio wave intensity characteristic Li indicating the carrier frequency of the intermediate frequency shown in FIG. 28 is generated by the smoothing circuit including the capacitor 237.

On the other hand, a noise component having a higher frequency than the baseband signal is separated from the detection output of the detector 208 through a high-pass filter 241 and amplified by a noise amplifier 242, and then rectified via a coupling capacitor. The output of the noise intensity characteristic Ln, which is rectified by the diode 244, smoothed by the smoothing circuit including the capacitor 245, the resistor 246, and the capacitor 247, and includes a negative voltage that changes in inverse proportion to the radio wave intensity shown in FIG. Occurs.

By connecting the resistor 236 and the resistor 246, the output of the radio field intensity characteristic Li and the output of the noise intensity characteristic Ln are combined, and as shown by Lm in FIG. Thus, the output of the combined characteristic indicating the radio wave intensity over a high incoming radio wave intensity can be obtained. The output of the combined characteristic is converted into a signal having no negative voltage component via the level converter 248 and output as radio field intensity information Lo.

The output of the composite characteristic Lm is output from the comparator 249.
Then, a squelch control signal 216 is generated for an incoming radio wave exceeding a predetermined threshold by comparing with a threshold voltage of the threshold circuit 250 of the squelch circuit.

In order to detect the radio wave intensity over a wider range, an intermediate frequency signal is extracted from an intermediate frequency amplifying stage which does not saturate even at a large incoming input level, and then amplified using a logarithmic amplifier and rectified, thereby obtaining a required signal. (Not shown).

FIG. 29 shows the embodiment (2) of the present invention, and shows the configuration of the radio receiving apparatus 2 in a block diagram. In the figure, 214 is a logical product circuit (LG), 2
16 is a squelch control signal.

As in the case of the embodiment (1), the console 2
When a threshold setting operation is performed at 22, the CPU 220 is activated to instruct the A / D converter 223 to capture radio field intensity information.

Then, the radio field intensity information taken in through the A / D converter 223 is converted into an incoming radio field intensity value using a conversion table stored in the memory 221, and a pre-set operation formula, For example, the upper limit threshold for mute control is automatically determined by the above-described equations (29) and (30) and stored in the memory 221.

Thereafter, based on the threshold value for muting control stored in the memory 221, the current radio field intensity information Lo is obtained.
, And a control signal is generated from the output port 225 via the AND circuit 214 based on the comparison result to control the switch circuit 211.

When the upper threshold is used as the threshold, when the radio field intensity information is equal to or less than the threshold, the logical product circuit 2 is output from the output port 225 and the squelch control signal 216.
By outputting an affirmative signal to 14 and turning on the switch circuit 211, the baseband signal from the baseband amplifier 212 is output to the terminal 213. When the radio field intensity information exceeds the threshold value, a negative signal is output from the output port 225 and the switch circuit 211 is always turned off so that the baseband signal is not output to the terminal 213. However, when the incoming radio wave intensity is lower than the minimum operation incoming radio wave intensity value Lmin, that is, the squelch operation sensitivity, a negative signal is input to the AND circuit 214 by the squelch control signal.
Is turned off.

As a result, it is possible to suppress the receiving operation for an unnecessary radio wave greater than the incoming radio wave intensity value Lr of the communication partner transmission wave from the communication partner radio transmission station.

FIG. 26 shows an embodiment (3) of the present invention. As in the case of the embodiment (1), the console 222
When the operation of setting the threshold value is performed, the CPU 220 is activated and instructs the A / D converter 223 to capture the radio field intensity information.

Then, the radio field intensity information fetched via the A / D converter 223 is converted into an incoming radio field intensity value using a conversion table stored in the memory 221, and a pre-set operation formula, For example, the lower limit threshold and the upper limit threshold to be muted are automatically determined by the above-described equations (29) and (30) and stored in the memory 221.

Thereafter, based on the binary threshold value to be mute-controlled stored in the memory 221, the comparison with the radio wave intensity information Lo at that time is continuously performed, and the output port 225 outputs the logical product circuit 214 based on the comparison result. , And generates a control signal to control the switch circuit 211.

Thus, it is possible to prevent an unnecessary radio wave from the radio communication station of the communication partner from receiving an unnecessary radio wave lower than the incoming radio wave intensity value Lr of the communication partner and an unnecessary radio wave higher than the incoming radio wave intensity value Lr from the communication partner. it can.

FIG. 30 shows an embodiment (4) of the present invention, and shows the configuration of the radio receiving apparatus 2 in a block diagram. In the figure, 202 is a variable attenuator (ATT),
226 is a digital / analog (D / A) converter.

As in the case of the embodiment (1), the console 2
When a threshold setting operation is performed at 22, the CPU 220 is activated to instruct the A / D converter 223 to capture radio field intensity information.

Then, the radio field intensity information fetched via the A / D converter 223 is converted into an incoming radio field intensity value using a conversion table stored in the memory 221, and a pre-set operation formula, For example, the attenuation set value of the variable attenuator 202 is automatically determined by the above-described equations (3) and (4) and stored in the memory 221.

Thereafter, the attenuation of the variable attenuator 202 is set via the D / A converter 226 based on the attenuation set value stored in the memory 221. As a result, the incoming radio wave is thereafter attenuated by the variable attenuator 202, and the incoming radio wave intensity value Lr of the communication partner becomes the incoming radio wave intensity value Lra of the counterpart transmission wave after passing through the variable attenuator 202.

On the other hand, the lower limit threshold value of the radio receiver 2 is the minimum operation incoming radio wave intensity value Lmin, that is, the squelch circuit 21
It is determined by the operation sensitivity of 0. If the incoming radio wave intensity is less than the squelch operation sensitivity, a negative signal is sent to the switch circuit 211 by the squelch control signal 216 to perform off control.

FIG. 31 shows the relationship between the incoming radio wave intensity and the attenuation by the variable attenuator. As shown in the drawing, if the incoming radio wave intensity value Lr of the communication partner's transmission wave from the communication partner's wireless transmission station is large, the attenuation At of the variable attenuator 202 can be increased, and the partner transmission after passing through the variable attenuator 202 can be increased. The signal is attenuated to the incoming radio wave intensity value Lra and input to the high frequency amplifier 203 of the wireless receiving device 2.

However, when the incoming radio wave intensity value Lr of the communication partner transmission wave is small, the insertion of the variable attenuator 202 causes a decrease in S / N in the wireless receiver 2. The attenuation value of the variable attenuator 202 is set so as to be equal to or greater than the incoming radio wave intensity value Lat. Here, the insertion start incoming radio wave intensity value Lat of the variable attenuator 202 is set to a value larger than the minimum operation incoming radio wave intensity value Lmin.

[0200] Thus, it is possible to prevent the receiving operation of the unnecessary radio wave from the radio transmission station of the communication partner with respect to the unnecessary radio wave lower than the incoming radio wave intensity value Lr of the communication partner.
Suppression of sensitivity by strong different frequency radio wave and high frequency amplifier 20
3 and the mixer 204 can be prevented from generating intermodulation waves.

FIG. 32 shows an embodiment (5) of the present invention, in which the configuration of the radio receiving apparatus 2 is shown by a block diagram. This embodiment is a combination of the setting of the lower limit threshold according to the embodiment (1) and the method of attenuating incoming radio waves by the variable attenuator 202 of the embodiment (4).

As in the case of the embodiment (1), the console 2
When a threshold setting operation is performed at 22, the CPU 220 is activated to instruct the A / D converter 223 to capture radio field intensity information.

Then, the radio field intensity information taken in through the A / D converter 223 is converted into an incoming radio field intensity value using a conversion table stored in the memory 221, and a pre-set operation formula, For example, the above equations (5), (6) and
According to (7) and (8), the lower limit threshold for mute control and the attenuation setting value of the variable attenuator 202 are automatically determined and stored in the memory 221, and the attenuation of the variable attenuator 202 is set. I do.

Thereafter, based on the lower threshold value stored in the memory 221, the comparison with the radio field intensity information Lo at that time is continuously performed, the logical product of the two comparison results is calculated, and the output port 225 A control signal is generated to control the switch circuit 211.

Thus, the minimum operation incoming radio wave intensity value L
The lower limit threshold can be set at a point higher than min, and therefore, the variable attenuator 202 does not greatly attenuate the incoming radio wave intensity value Lr of the communication partner transmitted wave from the wireless communication station of the communication partner. A signal from a radio transmitting station can be received in a good S / N state.

In this way, the receiving operation of the unnecessary radio wave lower than the incoming radio wave intensity value Lr of the communication partner from the communication partner radio transmitting station is prevented, the sensitivity is suppressed by the strong different frequency radio wave, and the high frequency amplifier 203 is suppressed. And the generation of an intermodulation wave in the mixer 204 can be prevented.

FIG. 33 shows a radio transmission apparatus according to the embodiment (6) of the present invention, and shows the configuration of the radio transmission apparatus 1 in a block diagram. In the figure, 101 is an input terminal of a baseband signal, 102 is a baseband amplifier (LFA), 103 is a changeover switch, 104 is a radio transmitter (Tx), 105 is a transmission antenna, and 110 is a CP.
U and 111 are a memory (MEM), 112 is a display (DSP), 113 is a keyboard (KBD), 114 is a serial interface (SIF), and 115 is a CPU1.
Reference numeral 10 denotes an output port (OP), 116 denotes a common bus of the CPU 110, and 118 denotes a modulator (MOD).

FIG. 34 shows a radio receiving apparatus according to the embodiment (6) of the present invention, and shows the configuration of the radio receiving apparatus 2 in a block diagram. In the figure, the same parts as those in FIG. 26 are indicated by the same numbers, 224 is a serial interface (SIF), and 230 is a demodulator (DEM)
It is.

In the embodiment (6), when the radio transmitting station performs normal communication, the radio transmitting apparatus 1 shown in FIG. 33 is activated (the activation circuit is not shown), and the baseband signal is inputted from the input terminal 101. , Is amplified to a predetermined level by the baseband amplifier 102, and then applied to the modulation input of the wireless transmitter 104 via the changeover switch 103. The wireless transmitter 104 modulates the wireless carrier according to the modulation input, and transmits predetermined transmission power from the transmission antenna 105 to the wireless reception device 2.

In FIG. 34, in radio receiving apparatus 2, an incoming signal is guided to high-frequency amplifier 203 via receiving antenna 201, amplified, and mixed at local oscillator 20 by mixer 204.
5 is converted to an intermediate frequency fi by being mixed with the local oscillation signal of No. 5 and band-limited by the band-pass filter 206, then amplified by the intermediate frequency amplifier 207, and
At 08, it is detected and demodulated into a baseband signal.

In the embodiment (6), a threshold setting signal is transmitted from the radio transmitting apparatus 1 to the radio receiving apparatus 2, and a threshold corresponding to the reception level of each receiving station is automatically set according to a program incorporated in the radio receiving apparatus 2. To set.

When transmitting the threshold setting signal from the radio transmitting apparatus 1, the threshold setting signal of the own station written in the storage unit 111 is read out by operating the keyboard 113 and displayed on the display 112. , From the serial interface 114 as a serial signal to the digital transmission modulator 118 and to the changeover switch 103 as a baseband signal.

Prior to the transmission of the serial signal, a switching signal is transmitted from the output port 115 to the switch 103, and the ON operation of the switch 103 is continued until the signal transmission is completed, and the serial signal is transmitted to the radio transmitter 104. In addition, the carrier is modulated and transmitted as a radio wave from the transmitting antenna 105.

The storage unit 111, the display 112, the keyboard 113, the serial interface 114, and the output port 115 are connected to the CPU 11 via a common bus 116.
0, and performs an operation based on a control command of the CPU 110 according to a program stored in the storage device 111.

A part of the baseband signal demodulated by radio receiving apparatus 2 is demodulated by digital signal demodulator 230 and input to serial interface 224 as a serial signal. Serial interface 2
24, the threshold setting signal of the digital signal is C
Read by PU processing.

By receiving the threshold setting signal, the threshold setting is started in the same manner as the threshold setting based on the operation of the console 222 in the embodiment (1).
The same operation as in the embodiment (1) is performed.

In the embodiment (6), the method of performing the threshold setting signal by a digital signal has been described. However, any other signal method may be used as long as required setting information can be transmitted.

As described above, according to the present embodiment,
By the remote control from the wireless transmission device 1, the lower limit threshold suitable for each wireless reception device 2 can be set, and the operation for setting the threshold value in each wireless reception device is not required at all.

FIG. 35 shows a radio receiving apparatus according to the embodiment (7) of the present invention. The configuration of the radio receiving apparatus 2 is shown by a block diagram, in which the same elements as those in FIG. The same numbers are used.

As in the case of the radio receiving apparatus described in the embodiment (6), when the threshold setting signal is transmitted from the radio transmitting apparatus 1, by receiving this threshold setting signal,
In the wireless receiving device 2, the activation is performed in the same manner as the activation of the threshold setting based on the operation of the console 222 in the embodiment (2). Thereafter, in the same manner as in Example (6),
The digital signal is demodulated by the demodulator 230 of the wireless reception device 2 by transmitting the threshold setting signal from the wireless transmission device illustrated in FIG. 33, and is input to the serial interface 224. Then, a threshold setting signal composed of a digital signal received from the serial interface 224 is read by the CPU processing. Thereby, the same operation as that of the embodiment (2) can be performed thereafter.

As described above, according to the embodiment (7), the upper limit threshold suitable for the operation of the radio receiving apparatus 2 can be set in each radio receiving station by remote control from the radio transmitting apparatus 1. In addition, the operation for setting the threshold value in the wireless receiving device 2 is not required at all.

FIG. 34 shows an embodiment (8) of the present invention. As in the case of the embodiment (6), the threshold setting signal is transmitted from the wireless transmission device 1. By receiving the threshold setting signal, the wireless receiver 2 starts the threshold setting operation in the same manner as the start of the threshold setting operation by operating the console 222 in the embodiment (3).

When a threshold setting signal composed of a digital signal is transmitted from radio transmitting apparatus 1 shown in FIG. 33 in the same manner as in embodiment (6), demodulator 230
By demodulating this digital signal and inputting it to the serial interface 224, a threshold setting signal composed of the digital signal is read by the CPU processing. Thereby, the same operation as that of the embodiment (3) can be performed thereafter.

As described above, according to the embodiment (8), the lower limit and the upper limit suitable for the operation of the radio receiving apparatus 2 are set in each radio receiving station by remote control from the radio transmitting apparatus 1. This eliminates the need for any operation for setting the threshold in the wireless receiving device 2.

FIG. 36 shows a radio receiving apparatus according to the embodiment (9) of the present invention, and shows the configuration of the radio receiving apparatus 2 in a block diagram. As in the case of the embodiment (6), the threshold setting signal is transmitted from the wireless transmission device 1. By receiving the threshold setting signal, the wireless receiver 2 starts the threshold setting operation in the same manner as the start of the threshold setting operation by operating the console 222 in the embodiment (4).

When a threshold setting signal composed of a digital signal is transmitted from radio transmitting apparatus 1 shown in FIG. 33 in the same manner as in embodiment (6), demodulator 230
By demodulating this digital signal and inputting it to the serial interface 224, a threshold setting signal composed of the digital signal is read by the CPU processing. Thereby, the same operation as that of the embodiment (4) can be performed thereafter.

As described above, according to the embodiment (9), the setting of the amount of attenuation of the variable attenuator 202 suitable for the operation of the radio receiving apparatus 2 is performed in each radio receiving station by remote control from the radio transmitting apparatus 1. The operation for setting the amount of attenuation of the variable attenuator 202 in the wireless receiver 2 is not required at all.

FIG. 37 shows a radio receiving apparatus according to the embodiment (10) of the present invention, and shows the configuration of the radio receiving apparatus 2 in a block diagram. As in the case of the embodiment (6), the threshold setting signal is transmitted from the wireless transmission device 1. By receiving the threshold setting signal, the wireless receiver 2 starts the threshold setting operation in the same manner as the start of the threshold setting operation by operating the console 222 in the embodiment (5).

When a threshold setting signal composed of a digital signal is transmitted from radio transmitting apparatus 1 shown in FIG. 33 in the same manner as in embodiment (6), demodulator 230
By demodulating this digital signal and inputting it to the serial interface 224, a threshold setting signal composed of the digital signal is read by the CPU processing. Thereby, the same operation as that of the embodiment (5) can be performed thereafter.

As described above, according to the embodiment (10), the lower limit threshold suitable for the operation of the radio receiver 2 is set in each radio receiver by remote control from the radio transmitter 1.
The amount of attenuation of the variable attenuator 202 can be set, and the work of setting the threshold value and the amount of attenuation of the variable attenuator 202 in the wireless receiver 2 is not required at all.

FIG. 26 shows an embodiment (11) of the present invention. In the wireless receiving apparatus 2, instead of performing the threshold setting operation on the console 222 as in the case of the embodiment (1), numerical data for specifying the threshold is input.

Then, the radio field intensity information and the specified threshold value data taken in through the A / D converter 223 are calculated by using an arithmetic expression stored in the memory 221 in advance, for example, the above-described expression.
By performing arithmetic processing according to (9), (10), and (11), the lower limit threshold according to the operation state of the wireless receiving device 2 is automatically determined and stored in the memory 221. Hereinafter, Examples
The same operation as in (1) is performed.

As a result, the lower limit threshold can be set according to the operation state of each radio receiving apparatus 2, and the provision of the self-correction function can prevent erroneous threshold setting.

FIG. 29 shows an embodiment (12) of the present invention. In the wireless receiving apparatus 2, instead of performing a threshold setting operation on the console 222 as in the case of the embodiment (2), numerical data for specifying a threshold is input.

Then, the radio field intensity information and the threshold designation numerical data taken in through the A / D converter 223 are calculated by using an arithmetic expression stored in the memory 221 in advance, for example, the above-described expression.
By performing the arithmetic processing according to (31) and (32), the upper limit threshold value according to the operation state of the wireless reception device 2 is automatically determined and stored in the memory 221. Thereafter, the same operation as in the embodiment (2) is performed.

Thus, the upper limit threshold can be set according to the operation state of each radio receiving apparatus 2, and the provision of the self-correction function can prevent erroneous threshold setting.

FIG. 26 shows an embodiment (13) of the present invention. In the wireless receiving device 2, instead of performing the threshold setting operation on the console 222 as in the case of the embodiment (3), numerical data for specifying the threshold is input.

Then, the radio field intensity information and the threshold designating numerical data fetched via the A / D converter 223 are calculated by using an arithmetic expression stored in the memory 221 in advance, for example, the above-described expression.
According to (9), (10), (11), (31) and (32), a lower threshold and an upper threshold according to the operation state of the wireless receiver 2 are automatically determined by performing arithmetic processing. , Stored in the memory 221. Thereafter, the same operation as in the embodiment (3) is performed.

Thus, the lower threshold value and the upper threshold value can be set according to the operation state of each radio receiving apparatus 2, and erroneous threshold setting can be prevented by providing a self-correction function. .

FIG. 30 shows an embodiment (14) of the present invention. In the wireless receiving apparatus 2, instead of performing the threshold setting operation on the console 222 as in the case of the embodiment (4), numerical data for designating the amount of attenuation is input.

[0241] The radio field intensity information and the threshold value numerical data fetched via the A / D converter 223 are calculated by using an arithmetic expression stored in the memory 221 in advance, for example, the aforementioned expression.
By performing the arithmetic processing according to (12), (13) and (14), the amount of attenuation according to the operation state of the wireless receiver 2 is automatically determined and stored in the memory 221. Hereinafter, Examples
The same operation as in (4) is performed.

As a result, the amount of attenuation of the variable attenuator 202 can be set according to the operation state of each radio receiver 2, and an erroneous attenuation value can be set by providing a self-correction function. Can be prevented.

FIG. 32 shows an embodiment (15) of the present invention. In the wireless reception device 2, instead of performing the threshold setting operation on the console 222 as in the case of the embodiment (5), numerical data for specifying the threshold is input.

Then, the radio field intensity information and the threshold designation numerical data fetched through the A / D converter 223 are calculated by using an arithmetic expression stored in the memory 221 in advance, for example, the above-described expression.
By performing arithmetic processing according to (9), (10), (11) and equations (12), (13), (14), the lower threshold and the variable attenuator 202 according to the operation state of the wireless receiver 2 are determined. The attenuation amount is automatically determined and stored in the memory 221. Thereafter, Example (5)
The same operation as in the case of is performed.

Thus, it is possible to set the lower limit threshold and the amount of attenuation of the variable attenuator 202 according to the operation state of each radio receiver 2.

FIG. 33 shows a radio transmitting apparatus according to the embodiment (16) of the present invention, and FIG. 34 shows a radio receiving apparatus according to the embodiment (16) of the present invention. 1
And the configuration of the wireless receiver 2 are shown in a block diagram.

In the above-mentioned embodiment (6), the threshold setting signal is transmitted from the radio transmitting apparatus 1 to activate the threshold setting in the radio receiving apparatus 2.
In (16), instead of the threshold value setting signal from the keyboard 113, a threshold value designation signal, which is numerical data, is input, so that the wireless transmission device 1
From the wireless receiving device 2
Then, as in the case of the embodiment (11), the threshold value is set by performing the arithmetic processing.

FIG. 38 is a timing chart showing the operation of the embodiment (16). In FIG. 38, (a) is a transmission operation of the wireless transmission device 1, (b) is a threshold setting signal transmitted from the wireless transmission device 1, (c) is an interfering radio wave from another wireless transmission station, and (d) is (E) shows the lower threshold setting level of the wireless receiver 2, and (f) shows the baseband signal output of the output terminal 213 of the wireless receiver 2.

Now, jamming radio waves from another radio transmitting station (c)
Is transmitted, the radio receiver 2 receives the incoming signal at the incoming radio wave intensity (d), but since the lower threshold setting level (e) is low, the baseband signal based on the interfering radio wave (c) is sent to the output terminal 213. Output.

In this state, when radio transmitting apparatus 1 performs a transmitting operation and sends a threshold specifying signal to radio receiving apparatus 2, radio receiving apparatus 2 receives the threshold specifying signal and raises the lower threshold level to set the lower threshold level. I do. However, the strength of the incoming radio wave from the wireless transmission device 1 is high, so that the output of the baseband signal at the output terminal 213 is possible.

Next, when a change operation is performed from the radio transmitting apparatus 1 so as to further raise the lower threshold level, the lower threshold setting level (e) of the radio receiving apparatus 2 further increases.

When an interfering radio wave (c) from another radio transmitting station arrives again, the incoming radio wave intensity (d) is lower than the lower threshold setting level (e) of the radio receiver 2, so that the baseband signal output terminal Output to 213 is blocked.

In FIG. 38, radio transmission apparatus 1
After the communication ends, the lower threshold setting level of the wireless receiver 2
(e) shows a case where a change operation is performed so as to lower the value.

FIG. 33 shows a radio transmitting apparatus according to the embodiment (17) of the present invention, and FIG. 35 shows a radio receiving apparatus according to the embodiment (17) of the present invention. 1
And the configuration of the wireless receiver 2 are shown in a block diagram.

In the above-mentioned embodiment (7), the threshold setting signal is transmitted from the radio transmitting apparatus 1 to start the threshold setting in the radio receiving apparatus 2.
In (17), instead of the threshold value setting signal from the keyboard 113, a threshold value designating signal, which is numerical data, is input.
From the wireless receiving device 2
Then, as in the case of the embodiment (12), the arithmetic processing is performed to set the threshold.

FIG. 33 shows a radio transmitting apparatus according to the embodiment (18) of the present invention, and FIG. 34 shows a radio receiving apparatus according to the embodiment (18) of the present invention. 1
And the configuration of the wireless receiver 2 are shown in a block diagram.

In the above-mentioned embodiment (8), the threshold setting signal is transmitted from the radio transmitting apparatus 1 to activate the threshold setting in the radio receiving apparatus 2.
In (18), instead of the threshold value setting signal from the keyboard 113, a threshold value designating signal, which is numerical data, is input.
From the wireless receiving device 2
Then, as in the case of the embodiment (13), the arithmetic processing is performed to set the threshold.

FIG. 33 shows a radio transmitting apparatus according to the embodiment (19) of the present invention, and FIG. 36 shows a radio receiving apparatus according to the embodiment (19) of the present invention. 1
And the configuration of the wireless receiver 2 are shown in a block diagram.

In the above-described embodiment (9), the attenuation setting of the variable attenuator 202 is started in the wireless reception device 2 by transmitting the attenuation setting signal from the wireless transmission device 1. In example (19), keyboard 1
By inputting an attenuation specifying signal which is numerical data instead of the attenuation setting signal from 13, the numerical data is transmitted from the wireless transmission device 1 as in the case of the embodiment (14),
As a result, in the wireless receiving apparatus 2, the amount of attenuation of the variable attenuator 202 is set by performing arithmetic processing, as in the case of the embodiment (14).

FIG. 33 shows a radio transmitting apparatus according to the embodiment (20) of the present invention, and FIG. 37 shows a radio receiving apparatus according to the embodiment (20) of the present invention. 1
And the configuration of the wireless receiver 2 are shown in a block diagram.

In the above-described embodiment (10), the threshold setting signal is transmitted from the radio transmitting apparatus 1 to start the threshold setting in the radio receiving apparatus 2.
In (20), instead of the threshold setting signal from the keyboard 113, a threshold designating signal, which is numerical data, is input, so that the wireless transmission device 1
From the wireless receiving device 2
Then, as in the case of the embodiment (15), an arithmetic process is performed to set a threshold.

FIG. 39 shows a radio transmission apparatus according to the embodiment (21) of the present invention, and shows the configuration of the radio transmission apparatus 1 in a block diagram. In the figure, the same elements as those in FIG. 33 are indicated by the same numbers, and 117 is a transmission timer.

FIG. 40 shows a radio receiving apparatus according to the embodiment (21) of the present invention, and shows the configuration of the radio receiving apparatus 2 in a block diagram. In the figure, the same parts as those in FIG. 34 are denoted by the same numbers, and 229 is a reception timer.

In Examples (11) and (16) described above,
Although the setting of the threshold in the wireless receiving device 2 was controlled from the wireless transmitting device 1, during operation for a long period of time, due to a change in the radio wave propagation state or deterioration in the performance of the wireless transmitting device 1 and the wireless receiving device 2, At the set threshold,
A failure may occur in which radio waves from the wireless transmission station of the communication partner are blocked.

Therefore, the radio receiving apparatus 2 has a function of releasing the set threshold value after the lapse of a set time of the reception timer 229 after a lapse of a predetermined period, and returning the threshold value to the minimum operation incoming radio field intensity value Lmin. In the wireless transmission device 1, the set time of the transmission timer 117 is set to a time shorter than the set time of the reception timer 229, and the threshold setting signal or the memory 111 is automatically stored at the set time interval. The previous threshold setting signal is transmitted.

As a result, the threshold set value of the radio receiving apparatus 2 is corrected in accordance with the change in the state of the radio line. When the reception becomes impossible due to the set threshold, the reception becomes possible after the operation of the reception timer 229, and the next threshold setting signal or the threshold designation signal from the radio transmitting station can be received to correct the threshold setting value. it can.

FIG. 41 is a timing chart showing the operation of the embodiment (21). 41, (a) is a transmission operation of the wireless transmission device 1, (b) is a threshold setting signal transmitted from the wireless transmission device 1, (br) is a reception signal from the wireless transmission device 1, and (t) is a signal. (E) shows the operation of the reception timer 229 in the wireless receiver 2, and (e) shows the lower threshold setting level in the wireless receiver 2. Note that T is the operation time of the reception timer 229.

Now, when the radio transmitting apparatus 1 transmits and sends a threshold designation signal to the radio receiving apparatus 2, the radio receiving apparatus 2
Upon receiving the threshold designation signal, the lower threshold level (e) is raised, and the reception timer 229 starts counting time. The wireless receiving device 2 keeps the specified threshold until the end of the operation time of the reception timer 229, so that the wireless transmission device 1 transmits a threshold designation signal until the operation time T is reached. The threshold designating signal at this time may be the same value as the previous value, or may be a setting change instruction signal.

When receiving the threshold designation signal, the radio receiving apparatus 2 cancels the counting operation of the receiving timer 229 and starts counting the time from the beginning. In the wireless transmission device 1,
The transmission timer 117 is set to automatically retransmit the threshold designation signal at intervals shorter than the operation time T of the reception timer 229.

However, when the strength of the incoming radio wave from the radio transmitting apparatus 1 decreases due to a change in radio wave propagation conditions or the like and the threshold designation signal cannot be received, the reception timer 2
At the end of the set time of 29, the reception timer 229 returns the threshold level to the minimum operation incoming radio field intensity value Lmin.
You can also receive weak radio waves.

As a result, the threshold value is automatically reset by the next threshold value designation signal from the radio transmitting apparatus 1 and the arithmetic processing in the radio receiving apparatus 2.

FIG. 39 shows a radio transmitting apparatus according to the embodiment (22) of the present invention, and FIG. 42 shows a radio receiving apparatus according to the embodiment (22) of the present invention. 1
And the configuration of the wireless receiver 2 are shown in a block diagram.

In the embodiment (22) of the present invention, the transmission timer 117 and the reception timer 229 are provided in the above-described embodiments (12) and (17) in the same manner as in the embodiment (21), so that the threshold can be set. It has a function to correct.

FIG. 39 shows a radio transmitting apparatus according to the embodiment (23) of the present invention, and FIG. 40 shows a radio receiving apparatus according to the embodiment (23) of the present invention.

In the embodiment (23) of the present invention, as in the embodiments (13) and (18), the transmission timer 117 and the reception timer 229 are provided in the same manner as the embodiment (21), so that the threshold value can be reduced. It has a function to correct.

FIG. 39 shows a radio transmitting apparatus according to the embodiment (24) of the present invention, and FIG. 43 shows a radio receiving apparatus according to the embodiment (24) of the present invention. The configurations of the device 1 and the wireless receiving device 2 are shown by block diagrams.

In the embodiment (24) of the present invention, as in the embodiments (14) and (19), the transmission timer 117 and the reception timer 229 are provided in the same manner as in the embodiment (21), so that the threshold can be set. It has a function to correct.

FIG. 39 shows a radio transmitting apparatus according to the embodiment (25) of the present invention, and FIG. 44 shows a radio receiving apparatus according to the embodiment (25) of the present invention. The configurations of the device 1 and the wireless receiving device 2 are shown by block diagrams.

In the embodiment (25) of the present invention, as in the embodiments (15) and (20), the transmission timer 117 and the reception timer 229 are provided in the same manner as in the embodiment (21) so that the threshold value can be reduced. It has a function to correct.

FIGS. 26 and 34 show a radio receiving apparatus according to the embodiment (26) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (26) of the present invention.

In the embodiment (11), the console 222
However, in the embodiment (16), the specified level of the absolute value Lz is input as the specified threshold data from the keyboard 113 of the wireless transmission device 1 to set the lower threshold of the wireless reception device 2. In the embodiment (26), by adding the processing functions of the formulas (15), (16) and (17) to the wireless reception device 2, the threshold-designated numerical data can be changed based on the current set point. By inputting the value ± Lv, the change setting of the threshold value can be easily performed.

FIGS. 29 and 35 show a radio receiving apparatus according to the embodiment (27) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (27) of the present invention.

In the embodiment (12), the console 222
However, in the embodiment (17), the specified level of the absolute value Lz is input as the specified threshold data from the keyboard 113 of the wireless transmission device 1 to set the upper threshold of the wireless reception device 2. In the embodiment (27), by adding the processing functions of Expressions (33) and (34) to the wireless reception device 2, the threshold value designated numerical data can be set to the variable value ± Lv based on the current set point. By the input, the change setting of the threshold value can be easily performed.

FIGS. 26 and 34 show a radio receiving apparatus according to the embodiment (28) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (28) of the present invention.

In the embodiment (13), the console 222
Manually and in the embodiment (18), by inputting the designated level of the absolute value Lz as the threshold designated numerical data from the keyboard 113 of the wireless transmitting apparatus 1, and setting the lower threshold and the upper threshold of the wireless receiving apparatus 2. Went, but the example
In (28), equations (15), (16), and (17)
And by adding the processing functions of equations (33) and (34),
The change of the threshold value can be easily set by inputting the variable value ± Lv based on the current set point as the threshold value numerical data.

FIGS. 30 and 36 show a radio receiving apparatus according to the embodiment (29) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (29) of the present invention.

In the embodiment (14), the console 222
In the embodiment (19), the designated value of the absolute value Lz is inputted as the attenuation designated numerical data from the keyboard 113 of the wireless transmitting device 1 and manually, and in the embodiment (19),
The attenuation amount of the variable attenuator 202 is set in the embodiment.
In (29), by adding the processing functions of Equations (18), (19) and (20) to the wireless receiving apparatus 2, variable value based on the current set point is obtained as attenuation-designated numerical data. ±
By inputting Lv, a change setting of the attenuation amount can be easily performed.

FIGS. 32 and 37 show a radio receiving apparatus according to the embodiment (30) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (30) of the present invention.

In the embodiment (15), the console 222
Manually and in the embodiment (20), the lower limit threshold value and the specified value of the absolute value Lz are input as the attenuation specifying numerical data from the keyboard 113 of the wireless transmission device 1, and the lower limit threshold value of the wireless reception device 2 is input. And the attenuation of the variable attenuator 202 is set. In the embodiment (30), the equations (15), (16), (17) and
8), (19), and (20) are added to change the threshold and attenuation by inputting a variable value ± Lv based on the current set point as the threshold and attenuation specification numerical data. Can be easily performed.

FIGS. 26 and 34 show a radio receiving apparatus according to the embodiment (31) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (31) of the present invention.

In the embodiment (11), the console 222
Manually and in the embodiment (16), the lower limit threshold value and the specified value of the absolute value Lz are input as the attenuation specifying numerical data from the keyboard 113 of the wireless transmission device 1, and the lower limit threshold value of the wireless reception device 2 is input. However, in the embodiment (31), the wireless receiving apparatus 2 is provided with the equation (2).
1) By adding processing functions of (22) and equations (23), (24), and (25), it is easy to change and set the margin value data from the current margin value to the new margin value Mb. Can be.

FIGS. 29 and 35 show a radio receiving apparatus according to the embodiment (32) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (32) of the present invention.

In the embodiment (12), the console 222
However, in the embodiment (17), the specified value of the absolute value Lz is input as the specified threshold value data from the keyboard 113 of the wireless transmission device 1 and the upper limit threshold of the wireless reception device 2 is set. In the embodiment (32), by adding the processing functions of Equations (35) and (36) to the wireless receiving apparatus 2, the change setting from the current margin value to the new margin value Mb can be performed as the margin value data. It can be done easily.

FIGS. 26 and 34 show a radio receiving apparatus according to the embodiment (33) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (33) of the present invention.

In the embodiment (13), the console 222
And manually, and in the embodiment (18), by inputting the specified value of the absolute value Lz as the threshold specified numerical data from the keyboard 113 of the wireless transmission device 1 to set the lower limit threshold and the upper limit threshold of the wireless reception device 2 Performed, Example (33)
In equation (2), the equations (21), (22), (23), and (2)
By adding the processing functions of (4) and (25) and the equations (35) and (36), it is possible to easily change and set the margin value data from the current margin value to the new margin value Mb.

FIGS. 30 and 36 show a radio receiving apparatus according to the embodiment (34) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (34) of the present invention.

In the embodiment (14), the console 222
In the embodiment (19), the designated value of the absolute value Lz is inputted as the attenuation designated numerical data from the keyboard 113 of the wireless transmitting device 1 and manually, and in the embodiment (19),
The attenuation amount of the variable attenuator 202 is set in the embodiment.
In (34), by adding the processing functions of Equations (26), (27) and (28) to the wireless receiver 2, the current margin value is changed to a new margin value Mb as margin value data. Setting can be easily performed.

FIGS. 32 and 37 show a radio receiving apparatus according to the embodiment (35) of the present invention, and FIG. 33 shows a radio transmitting apparatus according to the embodiment (35) of the present invention.

In the embodiment (15), the console 222
From the keyboard 113 of the wireless transmission device 1 and manually inputting the specified value of the absolute value Lz as the numerical data of the lower limit threshold and the attenuation amount,
Although the lower limit threshold of the wireless receiving device 2 and the attenuation of the variable attenuator 202 were set, in the embodiment (35), the formula (21), (22) or the formula (23), By adding the processing functions of (24), (25) and equations (26), (27), (28), it is possible to easily change and set the current margin value to a new margin value Mb as margin value data. be able to.

In the embodiment (36), in each of the above embodiments, the method of setting the margin value of the arithmetic processing in the radio receiver 2 to the variable incoming operation margin Maa by the equation (37) is performed. By setting the margin value to the incoming operation margin Maa, it is possible to automatically set a margin value according to the state of the wireless line, and it is possible to more reliably secure the line and remove unnecessary radio waves.

FIGS. 33 and 39 show a radio transmission apparatus according to the embodiment (37) of the present invention.
9, FIG. 40, and FIGS. 42 to 44 show a radio receiving apparatus according to an embodiment (37) of the present invention.

[0302] In the radio transmitting apparatus 1, the CPU 11
0, a storage device 111, and a common bus 116, a function of transmitting a selection signal according to the radio field intensity by operating the keyboard 113, and a condition for transmitting to the wireless receiving device according to the radio field intensity. The transmitter 10 has a function of transmitting data, and performs modulation by the modulator 118 through the serial interface 114.
4 to transmit as radio waves.

[0303] In the radio receiving apparatus 2, the radio field intensity from the radio transmitting apparatus 1 of the communication partner is transmitted to the incoming radio field intensity signal 215.
And a selection signal to be detected by the own station is determined in accordance with a predetermined radio field intensity category.

Then, the radio receiving apparatus 2 is
Is demodulated by the demodulator 230, and only when the selection signal of the own station is received, the condition data signal transmitted subsequently is received and taken in.

The fetched condition data is, for example, a threshold instruction value, an attenuation amount instruction value of the variable attenuator 202, or an arithmetic processing program according to the received radio wave intensity category, according to the received radio wave intensity of the own station.

As described above, in the embodiments, the description of the radio transmitting apparatus 1 and the radio receiving apparatus 2 has been described as CPU processing by software with a configuration centering on the CPU, but it is also possible to configure and realize only with hardware. It is possible.

As described above, in a wireless communication system including one wireless transmitting device 1 and a large number of wireless receiving devices 2 for a wireless receiving station, fine designation of reception conditions according to the received radio wave intensity category is performed. This makes it possible to provide a system that is resistant to jamming radio waves and that can be adjusted efficiently.

[0308]

As described above, according to the present invention, the following various effects can be obtained. (1) At the time of installation of a wireless receiving device, etc., it is not necessary to measure the intensity of incoming radio waves from a communication partner wireless transmitting station and perform setting suitable for each wireless receiving device, and a one-touch threshold corresponding to the installation state. Also, since the amount of attenuation of the attenuator inserted in the reception path can be set, the operation can be made more efficient, and a radio receiving apparatus that is resistant to interference can be realized.

(2) By a remote operation from the wireless transmission device, a threshold value according to the incoming radio wave intensity state of the wireless reception device,
Since the amount of attenuation of the attenuator inserted in the reception path can be set, the operation can be made more efficient, and a wireless communication system resistant to interference can be realized.

(3) By providing the transmission timer and the reception timer, when the set threshold value or the attenuation of the attenuator inserted in the reception path becomes inappropriate due to a change in the radio channel condition, the transmission timer and the reception timer are periodically set. The threshold and the attenuation of the attenuator can be updated.

(4) In the radio receiving apparatus, by setting an upper limit threshold value, it is possible to prevent an unnecessary receiving operation for a strong jamming radio wave.

(5) By providing a lower limit threshold and an upper limit threshold in the radio receiving apparatus, it is possible to prevent unnecessary reception operation for radio waves weaker and stronger than the target wave.

(6) By setting a threshold for the strength of the incoming radio wave from the radio transmission station of the communication partner and the amount of attenuation of the attenuator inserted in the reception high-frequency circuit, a reception operation margin is provided to allow the radio transmission apparatus and radio reception It is possible to configure a stable wireless communication system that is resistant to fluctuations of the device and fluctuations due to fading of the radio propagation path.

(7) The incoming operation margin value for setting the threshold value of the radio receiving apparatus 2 and the setting of the attenuation amount of the attenuator inserted in the receiving high-frequency circuit is automatically set in accordance with the incoming radio wave intensity from the communication partner transmitting station. Since it has a function of setting by calculation, it is possible to set a more accurate incoming operation margin by eliminating an excessive margin, and thus to improve the accuracy when unnecessary reception is eliminated.

(8) In addition, according to the classification of the radio wave intensity received from the communication partner transmitting station, the setting of the threshold value, the amount of attenuation of the attenuator to be inserted into the receiving high-frequency circuit, and the setting calculation conditions such as the threshold value are performed by the communication partner transmitting device , It is possible to easily set up a wireless communication system that is capable of specifying detailed reception conditions and is stable and resistant to interference.

[Brief description of the drawings]

FIG. 1 is a diagram showing a principle configuration (1), (3), (9), (10) of the present invention.

FIG. 2 is a diagram showing a basic configuration (2), (9), (10) of the present invention.

FIG. 3 is a diagram showing the basic configurations (4), (9), and (10) of the present invention.

FIG. 4 is a diagram showing the basic configurations (5), (9), and (10) of the present invention.

FIG. 5 is a diagram showing the basic configuration of the present invention (6) -1, (6) -3, (8), (9), (10)
FIG.

FIG. 6 is a diagram showing a basic configuration (6) -2, (8), (9), (10) of the present invention.

FIG. 7 is a diagram showing the basic configurations (6) -4, (8), (9), and (10) of the present invention.

FIG. 8 is a diagram showing the basic configurations (6) -5, (8), (9), and (10) of the present invention.

FIG. 9 is a diagram showing the basic configuration of the present invention (7) -1, (7) -3, (8), (9), (10)
FIG.

FIG. 10 is a diagram showing the basic configurations (7) -2, (8), (9), and (10) of the present invention.

FIG. 11 is a diagram showing the basic configurations (7) -4, (8), (9), and (10) of the present invention.

FIG. 12 is a diagram showing the basic configurations (7) -5, (8), (9), and (10) of the present invention.

FIG. 13 is a diagram showing a basic configuration (11) of the present invention.

FIG. 14 is a diagram showing an incoming radio wave intensity and a detection characteristic (1).

FIG. 15 is a diagram showing an incoming radio wave intensity and detection characteristics (2).

FIG. 16 is a diagram showing an incoming radio wave intensity and a detection characteristic (3).

FIG. 17 is a diagram showing an incoming radio wave intensity and a detection characteristic (4).

FIG. 18 is a diagram showing an incoming radio wave intensity and a detection characteristic (5).

FIG. 19 is a diagram showing incoming radio wave intensity and detection characteristics (6).

FIG. 20 is a diagram showing an incoming radio wave intensity and a detection characteristic (7).

FIG. 21 is a diagram showing incoming radio wave intensity and detection characteristics (8).

FIG. 22 is a diagram showing an incoming radio wave intensity and a detection characteristic (9).

FIG. 23 is a diagram showing an incoming radio wave intensity and a detection characteristic (10).

FIG. 24 is a diagram showing the relationship between the intensity of incoming radio waves and the lower and upper threshold values.

FIG. 25 is a diagram illustrating a configuration example of a wireless communication system suitable for implementing the method of the present invention.

FIG. 26 shows embodiments (1), (3), (11), (13), (26), and (2) of the present invention.
It is a figure which shows the wireless receiver of (8), (31), (33).

FIG. 27 is a diagram showing an example of a circuit configuration for detecting incoming radio wave intensity.

FIG. 28 is a diagram illustrating the detection characteristics of the incoming radio wave intensity detection circuit.

FIG. 29 is a diagram showing a wireless receiving apparatus according to embodiments (2), (12), (27), and (32) of the present invention.

FIG. 30 is a diagram showing a wireless receiving apparatus according to embodiments (4), (14), (29), and (34) of the present invention.

FIG. 31 is a diagram showing the relationship between the intensity of an incoming radio wave and the attenuation by a variable attenuator.

FIG. 32 is a diagram illustrating a wireless reception device according to embodiments (5), (15), (30), and (35) of the present invention.

FIG. 33 shows examples (6), (16) to (20), (26) to (3
It is a figure which shows the wireless transmission apparatus of (5), (37).

FIG. 34 shows examples (6), (8), (16), (18), (26), (2
It is a figure which shows the wireless receiver of (8), (31), (33).

FIG. 35 is a diagram showing a wireless receiving apparatus according to embodiments (7), (17), (27), (32), and (37) of the present invention.

FIG. 36 is a diagram showing a wireless receiving apparatus according to embodiments (9), (19), (29), (34), and (37) of the present invention.

FIG. 37 is a diagram illustrating a wireless receiving device according to embodiments (10), (20), (30), (35), and (37) of the present invention.

38 is a timing chart showing an operation of the embodiment (16), where (a) is a transmission operation of the wireless transmission device 1, (b) is a threshold setting signal transmitted from the wireless transmission device 1, (c) Is the intensity of the incoming radio wave of the wireless receiving device 2, (e) is the lower limit threshold setting level of the wireless receiving device 2, and (f) is the output terminal 213 of the wireless receiving device 2. 2 shows the output of the baseband signal.

FIG. 39 is a diagram showing a wireless transmission device according to embodiments (21) to (25) and (37) of the present invention.

FIG. 40 is a diagram illustrating a wireless receiver according to embodiments (21), (23), and (37) of the present invention.

41 is a timing chart showing an operation of the embodiment (21), (a) is a transmission operation of the wireless transmission device 1, (b) is a threshold setting signal transmitted from the wireless transmission device 1, (br) Indicates a received signal from the wireless transmission device 1, (t) indicates an operation of the reception timer 229 in the wireless reception device 2, and (e) indicates a lower threshold setting level in the wireless reception device 2.

FIG. 42 is a diagram showing a wireless receiver according to embodiments (22) and (37) of the present invention.

FIG. 43 is a diagram showing a wireless receiver according to embodiments (24) and (37) of the present invention.

FIG. 44 is a diagram showing a wireless receiver according to embodiments (25) and (37) of the present invention.

FIG. 45 is a diagram illustrating a configuration example of a conventional wireless communication system.

[Explanation of symbols]

 Reference Signs List 11 signal generator 13 selection signal generator 14 condition signal generator 22 threshold setting switch 23 comparison operation unit 24 signal receiver 25 changeover switch 26 input switch 117 transmission timer 202 variable attenuator 211 switch circuit 214 logical product circuit 221 memory 229 reception Timer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-2212926 (JP, A) JP-A-1-202931 (JP, A) JP-A-5-252061 (JP, A) JP-A-60-1985 240222 (JP, A) JP-A-3-54922 (JP, A) JP-A-3-54921 (JP, A) JP-A-55-97741 (JP, A) JP-A-61-48238 (JP, A) JP-A-63-10916 (JP, A) JP-A-7-202733 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04B 1/10

Claims (13)

(57) [Claims] 1. A radio receiving apparatus which receives and demodulates a radio wave from a radio transmitting apparatus and controls the output of the demodulated signal via a switch circuit. A lower threshold of the receiving operation according to the value is generated and stored in a memory, and thereafter, for each incoming radio wave, the stored lower threshold and the incoming radio wave intensity value are compared and determined by the comparison calculator, and the incoming call is received. A wireless reception system wherein the switch circuit is turned on or off in accordance with the magnitude of a radio wave intensity value and a lower limit threshold to prevent an unnecessary wave reception operation. 2. A radio receiving apparatus for receiving and demodulating radio waves from a radio transmitting apparatus and controlling the output of the demodulated signal via a switch circuit. The upper limit threshold of the receiving operation according to the value is generated and stored in the memory, thereafter, for each incoming radio wave, the stored upper threshold and the incoming radio wave intensity value are compared and determined by the comparison calculator, A judgment output is generated when the incoming radio wave intensity value is equal to or higher than the upper limit threshold, and a squelch control signal is generated from the comparison arithmetic unit when the incoming radio wave intensity value is equal to or lower than the minimum operation incoming radio wave intensity of the squelch operation of the wireless receiving device. By controlling the switch circuit to be turned off or on in accordance with the presence or absence of the output of the logical product of the determined output and the switch signal, the unnecessary wave reception operation is performed. Radio receiving method being characterized in that so as to stop. 3. A radio receiving apparatus which receives and demodulates radio waves from a radio transmitting apparatus and controls the output of the demodulated signal via a switch circuit. A lower threshold and an upper threshold of the receiving operation according to the value are generated and stored in a memory, and thereafter, for each radio wave arrival, the stored lower threshold and upper threshold and the incoming radio wave intensity value are compared with the incoming radio wave intensity value. When the incoming radio wave intensity value is equal to or higher than the lower threshold value and equal to or lower than the upper threshold value, the switch circuit is controlled to be turned on, and at other times, the switch circuit is controlled to be turned off. A wireless reception method characterized by blocking. 4. A radio receiving apparatus comprising a variable attenuator at a reception input for attenuating radio waves from a radio transmission apparatus to receive and demodulate the radio waves and controlling the output of the demodulated signal via a switch circuit. The amount of attenuation of the variable attenuator corresponding to the intensity value of the incoming radio wave is generated and stored in a memory by the arithmetic processing of the comparison arithmetic unit, and thereafter, the stored amount of attenuation is referred to as the variable attenuator for each incoming radio wave. The received signal strength value and the minimum operating received signal strength value of the squelch operation of the wireless receiving device are compared and determined by the comparison arithmetic unit, and the received signal strength value is equal to or more than the minimum operating received signal strength value. A wireless reception system, wherein the switch circuit is turned on or off in response to the control signal to prevent an unnecessary wave reception operation. 5. A radio receiving apparatus comprising a variable attenuator at a reception input for attenuating radio waves from a radio transmission apparatus to receive and demodulate the radio waves and controlling the output of the demodulated signal via a switch circuit. The lower limit threshold value of the receiving operation according to the incoming radio wave intensity value and the amount of attenuation of the variable attenuator are generated and stored in the memory by the arithmetic processing of the comparison arithmetic unit. The attenuation is set in the variable attenuator, the stored lower threshold and the incoming radio wave intensity value are compared and determined by the comparison calculator, and the switch is set according to the magnitude of the incoming radio wave intensity value and the lower threshold. A radio receiving system, characterized in that an unnecessary wave receiving operation is prevented by controlling a circuit to be turned on or off. 6. The wireless receiving system according to claim 1, further comprising a threshold setting switch provided in the wireless receiving device, wherein each of the thresholds and the threshold value in the comparison arithmetic unit is operated by operating the threshold setting switch. And / or activating a process of generating an amount of attenuation of the variable attenuator and storing the generated value in a memory. 7. The wireless reception system according to claim 1, wherein the wireless transmission device includes a signal generator to transmit a threshold setting signal, and the wireless reception device includes a signal receiver. By receiving the threshold value setting signal, the comparison operation unit performs the processes of generating the threshold value and / or the attenuation of the variable attenuator and storing and storing the generated value in the memory. A wireless reception method characterized by being activated. 8. The wireless receiving method according to claim 1, further comprising a threshold setting switch provided in the wireless receiving apparatus, and operating the threshold setting switch to store data and / or data on which each threshold is determined. Alternatively, by inputting data which is the basis for designating the attenuation of the variable attenuator, the comparison arithmetic unit generates each threshold data and / or attenuation of the variable attenuator from these data and the incoming radio wave intensity. And storing the generated value in a memory. 9. The radio reception system according to claim 1, further comprising a signal generator provided in the radio transmission device, and data used as a basis for determining each threshold and / or attenuation of a variable attenuator. By transmitting data serving as a basis for designation and providing a signal receiver in the wireless receiving device, and receiving these data, the comparison arithmetic unit can calculate the threshold value based on the data and the received radio wave intensity. A wireless reception system for generating data and / or attenuation of a variable attenuator, and storing the generated value in a memory. 10. The wireless reception system according to claim 1, further comprising: a signal generator provided in the wireless transmission device, wherein data of a calculation condition program for each threshold and / or attenuation of the variable attenuator is provided. And a signal receiver is provided in the wireless receiving apparatus, and by receiving the data, the comparison arithmetic unit stores the data in a memory, and attenuates each threshold and / or variable attenuator. A wireless reception method for updating the calculation condition of 11. The radio reception system according to claim 7, further comprising: a transmission timer for counting a predetermined time in the radio transmission device, and a reception timer for counting a time longer than the transmission timer in the radio reception device. When the threshold setting signal or the data on which the threshold value is determined and / or the data on which the attenuation of the variable attenuator is specified is transmitted at regular intervals, and the radio receiving apparatus receives the data. Activating the arithmetic processing of the comparison arithmetic unit and holding the data in the memory and resetting the count of the reception timer, and when the reception timer has completed counting before the output of the operation result in the comparison arithmetic unit,
The threshold data and / or attenuation data stored in the memory are updated with the lower threshold set to the minimum operating incoming radio field intensity value of the squelch operation, the upper threshold set to a sufficiently large value, and the attenuation of the variable attenuator set to zero. A wireless reception method. 12. The radio reception system according to claim 1, wherein the threshold value is determined when the threshold value and / or the attenuation of the variable attenuator in the comparison operation unit is set. A wireless reception method in which a margin value is provided, and control is performed such that the margin value is reduced when the incoming radio wave intensity value is large, and the margin value is increased when the incoming radio wave intensity value is small. 13. The wireless reception system according to claim 9, wherein the wireless transmission device includes a selection signal generator, and transmits a selection signal obtained by dividing an incoming radio wave intensity value into a plurality of stages. A condition signal generator, and data for each threshold data and / or attenuation amount of the variable attenuator according to the selected section or data on which each threshold value is determined and / or a basis for specifying the attenuation amount of the variable attenuator; The wireless receiving device is provided with a changeover switch, and selects according to the level of the received radio wave intensity value, and turns on the input switch when the classification of the received selection signal matches the selection of the changeover switch. The threshold signal specified by the condition signal and / or the attenuation amount data of the variable attenuator or the data on which each threshold value is determined and / or By storing in a memory according to the data on which the amount of attenuation of the variable attenuator is specified, or by updating the stored contents, the comparison arithmetic unit performs a comparison arithmetic processing according to each incoming radio wave intensity. Wireless reception method to be used.