JPS59175230A - Squelch sensitivity controller for mobile radio equipment - Google Patents
Squelch sensitivity controller for mobile radio equipmentInfo
- Publication number
- JPS59175230A JPS59175230A JP58050061A JP5006183A JPS59175230A JP S59175230 A JPS59175230 A JP S59175230A JP 58050061 A JP58050061 A JP 58050061A JP 5006183 A JP5006183 A JP 5006183A JP S59175230 A JPS59175230 A JP S59175230A
- Authority
- JP
- Japan
- Prior art keywords
- squelch
- level
- channel
- setting circuit
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000035945 sensitivity Effects 0.000 title claims description 9
- 238000001514 detection method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/34—Muting amplifier when no signal is present
Landscapes
- Noise Elimination (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明は、呼出信号の授受を行う１つの制御チャンネル
と、通話を行うための複数の通話チャンネルとが割当て
られている所謂パーンナル無線等の移動無線機のスケル
チ制御に関するものである。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a squelch control system for a mobile radio such as a so-called private radio to which one control channel for sending and receiving a calling signal and a plurality of communication channels for making a call are assigned. It's about control.
背景技術
一般にスケルチを行わせる場合、電界検出をノイズ検波
器圧よって行うノイズ検波型スケルチが用いられている
。その場合、可変抵抗器で選択することによシスケルチ
感度が設定されるようＫなっている。そのため、スケル
チ制御の一装置によって、スケルチが全く開いた状態か
らその無線機セットによって決る最大限度まで選ぶこと
によシ、最良の状態で聞けるようにコントロールするこ
とが可能である。しかしながら、パーソナル無線のよう
に制御チャンネルを介して呼出信号、チャンネル指定な
どのデータ信号を通信する無線機においては、ノイズ検
波型のスケルチ回路によって空チャンネルの判別をも行
う場合には、設定位置によって判別の基準が異ってしま
う。すなわち、スケルチがオープンの場合には電界情報
として全チキンネルが使用中となってしまうというよう
な不都合なことが起ることになる。BACKGROUND ART In general, when performing squelch, a noise detection type squelch is used in which electric field is detected using noise detector pressure. In that case, the system squelch sensitivity is set by selecting it with a variable resistor. Therefore, by using a squelch control device, it is possible to control the squelch so that it can be heard in the best condition by selecting the squelch from completely open to the maximum limit determined by the radio set. However, in radios such as personal radios that communicate data signals such as calling signals and channel designations via control channels, if the noise detection type squelch circuit also determines empty channels, depending on the setting position. The criteria for discrimination will be different. That is, when the squelch is open, an inconvenient situation occurs in which all channels are used as electric field information.
本発明は上述のような問題を取除くことを目的とするも
のであり、無線機が制御チャンネルにセットされている
時とか、空チャンネルを検出するためのオートスキャン
時には、スケルチ設定を予め決めた固定値に選び、適正
レベルの判定を行えるようにする。また通常の通話チャ
ンネルにある場合には、外部からの感度を可変となるよ
うにし、最適スケルチ状態での受信を行うと共に、通話
ゾーンの拡大を行えるようにしたものである。The purpose of the present invention is to eliminate the above-mentioned problems, and when the radio is set to a control channel or when auto-scanning to detect an empty channel, the squelch setting is set in advance. Select a fixed value so that you can determine the appropriate level. Furthermore, when on a normal communication channel, the sensitivity from the outside is made variable so that reception is performed in an optimal squelch state and the communication zone can be expanded.
本発明は、制御チャンネルと通話チャンネルとを有し、
制御チャンネルによって呼出信号の授受を行い、その後
通話チャンネルを用いて交信を行い、受信信号中のノイ
ズを検出して受信電波の有無を判別することにより、ス
ケルチ動作を行うようにした移動無線機に適用されたス
ケルチ感度制御装置である。そして、このスケルチ感度
制御装置は、スケルチを予め定めた固定レベルに設定す
る第１のレベル設定回路と、スケルチを可変設定するこ
とを可能とする第２のレベル設定回路と、受信信号中の
ノイズを検出するノイズ検波器の出力に応答し、制御チ
ャンネルおよび通話チャンネルの空チヤンネル状態を検
出しているオートスキャン動作時においては、スケルチ
レベルを第１のレベル設定回路によシレベル設定し、通
話チャンネルが選択設定された通話動作時においては、
スケルチレベルを第２のレベル設定回路にょルレベル設
定できるように、自動的に切換選択を行い得る信号切換
手段を崗えるようにしたものである。The present invention has a control channel and a speech channel,
A mobile radio device that performs a squelch operation by sending and receiving a calling signal through a control channel, then communicating using a speech channel, and detecting noise in the received signal to determine the presence or absence of received radio waves. This is an applied squelch sensitivity control device. This squelch sensitivity control device includes a first level setting circuit that sets the squelch to a predetermined fixed level, a second level setting circuit that makes it possible to variably set the squelch, and noise in the received signal. In response to the output of the noise detector that detects the noise, and during auto scan operation that detects the empty channel status of the control channel and the speech channel, the squelch level is set by the first level setting circuit, and the squelch level is set to the idle channel state of the speech channel. When the call operation is selected,
In order to be able to set the squelch level by the second level setting circuit, a signal switching means that can automatically perform switching selection is provided.
本発明によれば、呼出信号の交換時あるいは空チャンネ
ルを検出するためのオートスキャン時りけ、固定スケル
チによシ適正レベルでのオン・オフ判定を行い、その他
通話チャンネルにあるときは、外部信号が弱くなって変
調が途切れ途切れになった場合において、外部操作でス
ケルチレベルを変えて音が途切れないようにし、通話ゾ
ーンの拡大を図ることができる。According to the present invention, when exchanging ringing signals or during auto scan to detect an empty channel, a fixed squelch is used to determine on/off at an appropriate level, and when the channel is on a call channel, an external When the signal becomes weak and the modulation becomes intermittent, the squelch level can be changed by external operation to prevent the sound from being interrupted and expand the communication zone.
発明を実施するための最良の形態
次に本発明の実施例について図面を参照して説明、する
。第１図は本発明の実施例に係るスケルチ感度制御装置
を適用した無線機の受信部の概略構成を示すブロック回
路図である。BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block circuit diagram showing a schematic configuration of a receiving section of a radio device to which a squelch sensitivity control device according to an embodiment of the present invention is applied.
この図において、１６はアンテナで、受信電波は高周波
増幅器１で増幅され、局部発振器３０周波数と混合器２
で混合されて中間周波信号に変換される。混合器２の出
力は中間周波増幅器４で増幅され検波器５によって音声
検波される。音声周波信号は音量調節器９と低周波増幅
器１０を経た後、スピーカ１１に与えられて音声変換さ
れる。In this figure, 16 is an antenna, the received radio wave is amplified by the high frequency amplifier 1, and the local oscillator 30 frequency and the mixer 2
is mixed and converted into an intermediate frequency signal. The output of the mixer 2 is amplified by an intermediate frequency amplifier 4 and subjected to audio detection by a detector 5. The audio frequency signal passes through a volume controller 9 and a low frequency amplifier 10, and then is applied to a speaker 11 where it is converted into audio.
また、検波器５の出力は、固定抵抗器６と可変抵抗器７
の並列接続からなる２棟類のスケルチレベル設定回路に
与えられる。８は信号切換回路で、後述する動作により
固定抵抗器６で与えられる予め定められたレベルの信号
、または可変抵抗器７で与えられるレベルの信号を選択
しスケルチノイズ増幅器１３に与える。スケルチノイズ
増幅器１３の出力はスケルチノイズ検波器１４によって
受信電波の有無を判別するのに用いられる。検波器１４
の出力信号は制御部１５に与えられ、その出力はスケル
チスイッチ１２を経て低周波増幅器１ｏをスケルチ制御
する。一方、制御部１５の他の出力は、信号切換手段を
制御部１５と共に形成する信号切換回路８を制御するた
めに与えられるようになっている。In addition, the output of the detector 5 is connected to a fixed resistor 6 and a variable resistor 7.
This is applied to two types of squelch level setting circuits consisting of parallel connections. A signal switching circuit 8 selects a signal at a predetermined level provided by the fixed resistor 6 or a signal at a level provided by the variable resistor 7 and provides the selected signal to the squelch noise amplifier 13 by an operation described later. The output of the squelch noise amplifier 13 is used by the squelch noise detector 14 to determine the presence or absence of received radio waves. Detector 14
The output signal is given to the control unit 15, and the output passes through the squelch switch 12 to squelch control the low frequency amplifier 1o. On the other hand, the other output of the control section 15 is provided to control the signal switching circuit 8 which together with the control section 15 forms a signal switching means.
次に、スケルチ制御の動作について説明する。Next, the operation of squelch control will be explained.
制御チャンネルの状態で発呼すると、通話チャンネルの
空チャンネルを探す場合、受信入力電圧がしきい値より
高いか否かはスケルチ回路のオン・オフで判別する。When a call is made in the control channel state, when searching for an empty communication channel, whether or not the received input voltage is higher than a threshold value is determined by turning on and off the squelch circuit.
発呼している場合、信号切換回路８は接点ａ側に接続さ
れ、予め設定された一定抵抗器６による固定しきい値が
選択されている。アンテナ１６からの入力信号の強度に
応じてこのしきい値を基準にしてスケルチがオン−オフ
され、信号の有無が判別される。When a call is being made, the signal switching circuit 8 is connected to the contact a side, and a fixed threshold value set by a preset constant resistor 6 is selected. The squelch is turned on and off based on this threshold value according to the strength of the input signal from the antenna 16, and the presence or absence of the signal is determined.
一方、通話チャンネルに移った場合、制御部１５からの
制御信号によ多信号切換回路８は接点す側に切換わる。On the other hand, when switching to a speech channel, the multi-signal switching circuit 8 is switched to the contact side by a control signal from the control section 15.
すなわち、スケルチは可変抵抗器７によって機外から調
整可能となυ、信号レベルが拶〈なりて音声が途切れる
時には操作者が自由に操作し、スケルチのしきい値を変
えてこれを防止することができ１通話領域の拡大を図る
ことができる。That is, the squelch can be adjusted from outside the machine using the variable resistor 7, and when the signal level becomes low and the audio is interrupted, the operator can freely operate it to prevent this by changing the squelch threshold. This makes it possible to expand the communication area.
次に、交信終了後、制御チャンネルに戻ると、制御部１
５からの制御信号によって信号切換回路８は自動的に接
点ａ側に戻る。そのため、再度発呼した場合の窒チャン
ネル信号の有無の判定は、可変抵抗器７の位置に影響さ
れることがない。Next, after the communication ends, when returning to the control channel, the control unit 1
5, the signal switching circuit 8 automatically returns to the contact a side. Therefore, the determination of the presence or absence of the nitrogen channel signal when a call is made again is not affected by the position of the variable resistor 7.
制御部１５から、信号切換回路８に与えられる制御信号
は、無線機が制御チャンネルおよび通話でＱす？ΣネＩ
レ
チャゝン］フン’４４９Ｌｉいるときには、接点ａ側に
スイッチするような値を持ち、また通話チャンネルに移
ル、同一チヤンネルで所定時間（例えば２秒以上）経過
した場合には、接点す側にスイッチする値を持つように
決められる。The control signal given from the control unit 15 to the signal switching circuit 8 indicates whether the radio is on the control channel or on the call. Σne I
When there is [rechannel] Hun'449Li, it has a value that switches to the contact a side, and also moves to the call channel, and if a predetermined time (for example, 2 seconds or more) has elapsed on the same channel, it switches to the contact a side. Can be determined to have a switching value.
以上のようにして、動作状態に応じて自動的にスケルチ
感度の制御を行うことが可能となるが、 ″−固固
定抵抗器６伏As described above, it is possible to automatically control the squelch sensitivity according to the operating condition, but the
第１図は本発明の実施例に係るスケルチ感度制御装置を
適用した移動無線機のブロック回路図である。
６・・・・・・固定抵抗器、７・・・・・・可変抵抗器
，８・・・・・・信号切換回路、１３・・・用スケルチ
ノイズ増幅器、１４・・・・・・スケルチノイズ検波器
、１５・・・・・・制御部。FIG. 1 is a block circuit diagram of a mobile radio to which a squelch sensitivity control device according to an embodiment of the present invention is applied. 6...Fixed resistor, 7...Variable resistor, 8...Signal switching circuit, 13...Squelch noise amplifier, 14...Squelch Noise detector, 15...control unit.
Claims (1)
ネルによって呼出信号の授受を行い、その後通話チャン
ネルを用いて交信を行い、受信信号中のノイズを検出し
て受信電波の有無を判別することにより、スケルチ動作
を行うようにした移動無線機において、スケルチレベル
を予め定めた固定レベル罠設定する第１のレベル設定回
路６と、スケルチレベルを可変設定することを可能とす
る第２のレベル謹定回路７と、受信信号中のノイズユ を検出するノイズ検波器−の出力に応答し、制御チャン
ネルおよび通話チャンネルの空チヤンネル状態を検出し
ているオートスキャン動作時においては、スケルチを前
記第１のレベル設定回路６によシレベル設定し、通話チ
ャンネルが選択設定され九通話動作時においては、スケ
ルチを前記第２のレベル設定回路７によりレベル設定で
きるように、自動的に切換選択を行う信号切換手段１５
゜８とを備えていることを特徴とする移動無線機のスケ
ルチ感度制御装置。[Claims] The device has a control channel and a speech channel, and uses the control channel to send and receive a calling signal, then communicates using the speech channel, and detects noise in the received signal to determine the presence or absence of received radio waves. In a mobile radio device that performs a squelch operation by determining the squelch level, the first level setting circuit 6 sets the squelch level to a predetermined fixed level, and the second level setting circuit 6 allows the squelch level to be set variably. In response to the outputs of the level control circuit 7 and the noise detector that detects noise in the received signal, the squelch is set to The first level setting circuit 6 sets the level, and when the call channel is selected and set, the switching is automatically performed so that the squelch level can be set by the second level setting circuit 7 during the call operation. Signal switching means 15
8. A squelch sensitivity control device for a mobile radio, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58050061A JPS59175230A (en) | 1983-03-25 | 1983-03-25 | Squelch sensitivity controller for mobile radio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58050061A JPS59175230A (en) | 1983-03-25 | 1983-03-25 | Squelch sensitivity controller for mobile radio equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59175230A true JPS59175230A (en) | 1984-10-04 |
| JPH035696B2 JPH035696B2 (en) | 1991-01-28 |
Family
ID=12848480
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58050061A Granted JPS59175230A (en) | 1983-03-25 | 1983-03-25 | Squelch sensitivity controller for mobile radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59175230A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60193728U (en) * | 1984-05-31 | 1985-12-23 | 株式会社富士通ゼネラル | personal radio |
| JPS61269426A (en) * | 1985-05-23 | 1986-11-28 | Yaesu Musen Co Ltd | Squelch circuit |
| JPS6416134A (en) * | 1987-07-10 | 1989-01-19 | Toshiba Corp | Radio telephone system |
| WO1994017601A1 (en) * | 1993-01-29 | 1994-08-04 | Motorola Inc. | Communications receiver with an adaptive squelch system |
-
1983
- 1983-03-25 JP JP58050061A patent/JPS59175230A/en active Granted
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60193728U (en) * | 1984-05-31 | 1985-12-23 | 株式会社富士通ゼネラル | personal radio |
| JPS61269426A (en) * | 1985-05-23 | 1986-11-28 | Yaesu Musen Co Ltd | Squelch circuit |
| JPS6416134A (en) * | 1987-07-10 | 1989-01-19 | Toshiba Corp | Radio telephone system |
| WO1994017601A1 (en) * | 1993-01-29 | 1994-08-04 | Motorola Inc. | Communications receiver with an adaptive squelch system |
| US5465404A (en) * | 1993-01-29 | 1995-11-07 | Motorola, Inc. | Communications receiver with an adaptive squelch system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH035696B2 (en) | 1991-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5303406A (en) | Noise squelch circuit with adaptive noise shaping | |
| JP2676766B2 (en) | Wireless communication equipment | |
| JPS59175230A (en) | Squelch sensitivity controller for mobile radio equipment | |
| US4069454A (en) | Transmitter-receiver employing automatic channel hunting and selection | |
| KR940001601A (en) | Radio function addition method and device of mobile phone | |
| JP3071390B2 (en) | Apparatus for permitting cell selection in a terminal of a cellular mobile radio network in a standby state | |
| JPH0439809B2 (en) | ||
| JPS6326129A (en) | Control method for plural base stations | |
| JP3365944B2 (en) | Communication equipment | |
| KR100263173B1 (en) | Method for controlling ring modes according to received message of wireless phone which has a pager | |
| JPH08107444A (en) | Wireless mobile device self-diagnosis method | |
| JP2751455B2 (en) | Receive electric field strength judgment method | |
| JP3481000B2 (en) | Wireless communication device | |
| JP3063891B2 (en) | mobile phone | |
| JP2636308B2 (en) | Wireless communication equipment | |
| JP3043263B2 (en) | Portable information terminal device | |
| JP2545410Y2 (en) | Wireless communication system | |
| JPH026688Y2 (en) | ||
| JPH01171333A (en) | Radio telephone set | |
| JP2616812B2 (en) | Wireless telephone equipment | |
| JPH1041839A (en) | Detector for fm transmission station and autopreset device for the same | |
| JPH03293821A (en) | Reception level discriminating circuit | |
| JPH026689Y2 (en) | ||
| JPH04227125A (en) | Reception equipment | |
| JPH05276127A (en) | Broadcasting receiver |