JPS62176243A - Fsk modulator stabilizing method for tdma - Google Patents
Fsk modulator stabilizing method for tdmaInfo
- Publication number
- JPS62176243A JPS62176243A JP1672986A JP1672986A JPS62176243A JP S62176243 A JPS62176243 A JP S62176243A JP 1672986 A JP1672986 A JP 1672986A JP 1672986 A JP1672986 A JP 1672986A JP S62176243 A JPS62176243 A JP S62176243A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission
- section
- mux
- fsk modulator
- 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
- 238000000034 method Methods 0.000 title claims description 10
- 230000000087 stabilizing effect Effects 0.000 title claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 36
- 230000000694 effects Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ＴＤＭＡ通信方式で１つの加入者用無線送受
信装置を複数の加入者が利用する方式におけるＦＳＫ変
調器の安定化方法に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for stabilizing an FSK modulator in a TDMA communication system in which a single subscriber wireless transmitter/receiver is used by a plurality of subscribers. be.
基地局と複数の加入者とが同一周波数の電波を時分割で
使用する多方向多重無線通信方式は、周波数を有効に使
用できる経済的な加入者通信系として利用されている。A multidirectional multiplex wireless communication system in which a base station and a plurality of subscribers use radio waves of the same frequency in a time-division manner is used as an economical subscriber communication system that can use frequencies effectively.
そして近年、需要の増加に伴って存在する１つのビル内
の多数の利用者を１つの加入者用無線送受信装置で収容
する方式が計画されている。In recent years, as demand has increased, plans have been made to accommodate a large number of users in one building with one subscriber wireless transmitting/receiving device.
この方式を実現するためには、１つの無線送受信装置の
出力を分配し、また各利用者からの信号を多重化する機
能を有する装置が必要である。In order to realize this system, a device is required that has a function of distributing the output of one wireless transmitting/receiving device and multiplexing signals from each user.
一方、加入者系に用いられる変調方式は経済性の点から
ＦＳＫ変調が多く採用されているが、変調器の動作点を
安定に保つため、送信データ信号がない時間区間、疑似
ランダム信号が無線送受信装置に入力される。On the other hand, FSK modulation is often used as a modulation method for subscriber systems due to its economic efficiency, but in order to keep the operating point of the modulator stable, pseudo-random signals are Input to the transmitting/receiving device.
従って、前述の各利用者の信号を多重化する装置におい
ても、送信データ信号のない時間区間にＦＳＫ変調器の
動作点を安定させるための信号を人力する必要がある。Therefore, even in the above-mentioned apparatus for multiplexing the signals of each user, it is necessary to manually input a signal to stabilize the operating point of the FSK modulator during a time period in which there is no transmission data signal.
ＦＳＫ変調器の動作点を安定させる方法として、１つの
利用者の装置（回線終端装置）からの信号によりＦＳＫ
変調器の動作点を安定させる方法がある。しかしながら
、この方法では、該当の利用者の装置が故障した場合に
すべての加入者が影響を受けるという欠点があり、また
複数の回線終端装置からの信号を処理する方法は複雑、
高価となる欠点がある。As a method to stabilize the operating point of the FSK modulator, a signal from one user's device (line termination device) can be used to
There are ways to stabilize the operating point of the modulator. However, this method has the disadvantage that all subscribers will be affected if the corresponding user's equipment fails, and the method of processing signals from multiple line termination devices is complicated.
It has the disadvantage of being expensive.
このような欠点を除去するために本発明は、無線送受信
装置の受信部より抽出されたクロック信号を送信データ
信号がない時間区間に挿入するようにしたものである。In order to eliminate such drawbacks, the present invention is designed to insert a clock signal extracted from a receiving section of a wireless transmitter/receiver into a time period in which there is no transmission data signal.
本発明においては、ＦＳＫ変調器の動作点は安定化され
る。In the present invention, the operating point of the FSK modulator is stabilized.
本発明に係わるＴＤＭＡ用ＦＳＫ変調器安定化方法の一
実施例が適用された無線送受信装置を第１図に示す。第
１図において、１は空中線、２は送受共用器、３は周波
数変換器と復調器とから成る受信部、４はクロック信号
再生器と判定器とから成る信号再生部、５は信号分配部
、６は図示されていない回線終端装置と接続するための
インタフェース部、７は信号ＭＵＸ部、８はＦＳＫ変調
器、９は送信出力を制御する高周波スイッチ、１０は受
信信号出力端子、１１は送信データ信号入力端子、１２
は送信出ツノ制御信号入力端子である。FIG. 1 shows a wireless transmitter/receiver to which an embodiment of the TDMA FSK modulator stabilization method according to the present invention is applied. In FIG. 1, 1 is an antenna, 2 is a duplexer, 3 is a receiving section consisting of a frequency converter and a demodulator, 4 is a signal reproducing section consisting of a clock signal regenerator and a determiner, and 5 is a signal distribution section. , 6 is an interface unit for connecting to a line termination device (not shown), 7 is a signal MUX unit, 8 is an FSK modulator, 9 is a high frequency switch that controls the transmission output, 10 is a received signal output terminal, and 11 is a transmission unit. Data signal input terminal, 12
is a transmitting horn control signal input terminal.
信号ＭＵＸ部７は、第２図に示すように、多数の送信デ
ータ信号入力端子ＴＡＩ〜ＴＡｎ、多数の送信出力制御
信号入力端子ＴＢＩ〜ＴＢｎ、信号再生部４から出力さ
れるクロック信号を入力するためのクロック信号入力端
子７１、多重化された送信データ信号を出力するための
送信ＭＵＸ信号出力端子７２および各送信データ信号と
対応して送信出力を発射するだめのパルスを出力する送
信出力制御信号出力端子７３の各端子を有する。As shown in FIG. 2, the signal MUX unit 7 inputs a large number of transmission data signal input terminals TAI to TAn, a large number of transmission output control signal input terminals TBI to TBn, and a clock signal output from the signal reproduction unit 4. a clock signal input terminal 71 for outputting a multiplexed transmission data signal, a transmission MUX signal output terminal 72 for outputting a multiplexed transmission data signal, and a transmission output control signal for outputting a pulse for emitting a transmission output corresponding to each transmission data signal. It has output terminals 73.
次にこのように構成された無線送受信装置の動作につい
て第１図〜第３図を用いて説明する。回線終端装置から
の送信データ信号と送信出力制御信号は、インタフェー
ス部６を通過し、信号ＭＵＸ部７へ入力される。信号Ｍ
ＵＸ部７は、第３図（ａ）〜（ｇｌに示すような入出力
論理を有する構成であり、送信ＭＵＸ信号出力端子７２
には各利用者の終端装置からの送信データ信号が並び、
その送信データ信号の間はクロック信号で埋められる。Next, the operation of the wireless transmitting/receiving device configured as described above will be explained using FIGS. 1 to 3. The transmission data signal and transmission output control signal from the line termination device pass through the interface section 6 and are input to the signal MUX section 7. Signal M
The UX section 7 has an input/output logic as shown in FIGS.
The transmitted data signals from each user's terminal device are lined up,
The gaps between the transmitted data signals are filled with clock signals.
たとえば、第３図（ｂｌ、 （ｄ）に示す端子ＴＢＩ、
ＴＢ２上の送信出力制御信号と共に生じた第３図（ａ）
、 ｔｅｌに示す端子ＴＡＩ、ＴＡＺ上の送信データ信
号の場合、送信データ信号のない時間区間ＴＢを生じる
。この時間区間ＴＢにおいては、第３図（１１４１に示
すクロック信号が、第３図（ｆ）に示すように、送信デ
ータ信号の間に挿入される。なお、第３図（ｇｌに示す
信号は、送信出力制御信号出力端子７３から出力される
送信出力制御信号である。For example, the terminal TBI shown in FIG.
Figure 3(a) generated with the transmit power control signal on TB2.
, tel on the terminals TAI, TAZ, a time interval TB occurs in which there is no transmitted data signal. In this time interval TB, the clock signal shown in FIG. 3 (1141) is inserted between the transmission data signals as shown in FIG. , a transmission output control signal output from the transmission output control signal output terminal 73.
このようにして送信ＭＵＸ信号は、信号のない時間区間
のない信号として送信ＭＵＸ信号出力端子７２からＦＳ
Ｋ変調器８へ出力され、ＦＳＫ変調器８の動作を安定な
ものとする。ＦＳＫ変調器８に入力された送信ＭＵＸ信
号は、変調された後、高周波スイッチ９で送信出力を制
御され、空中線１から電波となって発射される。In this way, the transmission MUX signal is transferred from the transmission MUX signal output terminal 72 to the FS as a signal without a time interval where there is no signal.
The signal is output to the K modulator 8 to stabilize the operation of the FSK modulator 8. After the transmission MUX signal input to the FSK modulator 8 is modulated, the transmission output is controlled by the high frequency switch 9, and the signal is emitted from the antenna 1 as a radio wave.
以上説明したように本発明は、加入者用無線送受信装置
の受信部より抽出したクロック信号を送信データ信号が
ない時間区間に挿入することにより、送信ＭＵＸ信号を
信号のない時間区間のない信号７としたので、ＦＳＫ変
調器の動作点を安定に保つ効果がある。As explained above, the present invention inserts the clock signal extracted from the receiving section of the subscriber wireless transmitting/receiving device into the time period in which there is no transmission data signal, thereby converting the transmission MUX signal into a signal 7 that does not have a time period in which there is no signal. This has the effect of keeping the operating point of the FSK modulator stable.
第１図は本発明に係わるＴＤＭＡＤＭＡ用ＦＳＫ変調器
安定化方法施例が適用された無線送受信装置を示す系統
図、第２図はその無線送受信装置を構成する信号ＭＵＸ
部を示す構成図、第３図はその無線送受信装置の動作を
説明するためのタイムチャートである。
■・・・・空中線、２・・・・送受共用器、３・・・・
受信部、４・・・・信号再生部、５・・・・信号分配部
、６・・・・インタフェース部、７・・・・信号ＭＵＸ
部、８・・・・ＦＳＫ変調器、９・・・・高周波スイッ
チ、１０・・・・受信信号出力端子、１１・・・・送信
データ信号入力端子、１２・・・・送信出力制御信号入
力端子、ＴＡ１〜ＴＡｎ・・・・送信データ信号入力端
子、ＴＢＩ−ＴＢｎ・・・・送信出力制御信号入力端子
、７１・・・・クロック信号入力端子、７２・・・・送
信ＭＵＸ信号出力端子、７３・・・・送信出力制御信号
出力端子。
特許出願人 日本電気株式会社
日本電信電話株式会社FIG. 1 is a system diagram showing a wireless transmitter/receiver to which an embodiment of the TDMADMA FSK modulator stabilization method according to the present invention is applied, and FIG. 2 is a signal MUX that constitutes the wireless transmitter/receiver.
FIG. 3 is a time chart for explaining the operation of the wireless transmitter/receiver. ■・・・Antenna, 2...Double transmitter/receiver, 3...
Receiving section, 4... Signal reproducing section, 5... Signal distribution section, 6... Interface section, 7... Signal MUX
Part, 8...FSK modulator, 9...High frequency switch, 10...Reception signal output terminal, 11...Transmission data signal input terminal, 12...Transmission output control signal input Terminals, TA1 to TAn...Transmission data signal input terminal, TBI-TBn...Transmission output control signal input terminal, 71...Clock signal input terminal, 72...Transmission MUX signal output terminal, 73... Transmission output control signal output terminal. Patent applicant: NEC Corporation Nippon Telegraph and Telephone Corporation
Claims (1)
数の加入者が利用する方式におけるＦＳＫ変調器安定化
方法において、前記無線送受信装置の受信部より抽出さ
れたクロック信号を送信データ信号がない時間区間に挿
入することによりＦＳＫ変調器の動作点を安定化するこ
とを特徴とするＴＤＭＡ用ＦＳＫ変調器安定化方法。In a method for stabilizing an FSK modulator in a TDMA communication system in which a single subscriber wireless transmitting/receiving device is used by multiple subscribers, a clock signal extracted from a receiving section of the wireless transmitting/receiving device is used during a time when there is no transmitted data signal. A method for stabilizing an FSK modulator for TDMA, comprising stabilizing an operating point of an FSK modulator by inserting the modulator into an interval.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1672986A JPS62176243A (en) | 1986-01-30 | 1986-01-30 | Fsk modulator stabilizing method for tdma |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1672986A JPS62176243A (en) | 1986-01-30 | 1986-01-30 | Fsk modulator stabilizing method for tdma |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62176243A true JPS62176243A (en) | 1987-08-03 |
| JPH0431453B2 JPH0431453B2 (en) | 1992-05-26 |
Family
ID=11924349
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1672986A Granted JPS62176243A (en) | 1986-01-30 | 1986-01-30 | Fsk modulator stabilizing method for tdma |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62176243A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002065722A1 (en) * | 2001-02-09 | 2002-08-22 | Mitsubishi Denki Kabushiki Kaisha | Digital modulation system, radio communication system, radio communication device |
| WO2002065724A1 (en) * | 2001-02-13 | 2002-08-22 | Mitsubishi Denki Kabushiki Kaisha | Multiple-level modulating method, multiple-level demodulating method, and multiple-level modulating/demodulating method |
-
1986
- 1986-01-30 JP JP1672986A patent/JPS62176243A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002065722A1 (en) * | 2001-02-09 | 2002-08-22 | Mitsubishi Denki Kabushiki Kaisha | Digital modulation system, radio communication system, radio communication device |
| WO2002065724A1 (en) * | 2001-02-13 | 2002-08-22 | Mitsubishi Denki Kabushiki Kaisha | Multiple-level modulating method, multiple-level demodulating method, and multiple-level modulating/demodulating method |
| WO2002065723A1 (en) * | 2001-02-13 | 2002-08-22 | Mitsubishi Denki Kabushiki Kaisha | Multilevel modulating method, multilevel demodulating method, and multilevel modulating/demodulating method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0431453B2 (en) | 1992-05-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0077216B1 (en) | Radio system | |
| JP2766430B2 (en) | Method and apparatus for delivering wireless telephone signals over a cable television network | |
| US7245596B2 (en) | Modularly clustered radiotelephone system | |
| US5471473A (en) | Communication system and devices thereof | |
| AU1295792A (en) | A demodulator/modulator apparatus | |
| GB2253770A (en) | Multichannel radiotelephony system using bidirectional cable T.V. network | |
| JPH08256097A (en) | Access director interface for narrow band / wide band split network | |
| DK200300306A (en) | Digital multi-user radio telephone system - has master station radio linked to sun stations which are time division multiplexed onto single channel | |
| US6707807B1 (en) | Reception time of messages in access channels of TDMA mobile communication system controlled by transmitting device | |
| US4682350A (en) | Equipment for wireless telephone transmission | |
| EP0582754A1 (en) | Mobile communication system with linear digital modulation means | |
| JPS62176243A (en) | Fsk modulator stabilizing method for tdma | |
| ATE236497T1 (en) | FLEXIBLE FREQUENCY TIME DUPLEX IN RADIO TRANSMISSION SYSTEMS | |
| EP0656163B1 (en) | Method of establishing a communication link in a digital cordless telephone system | |
| JPH07336767A (en) | Transmitter | |
| JPS639332A (en) | Digital subscriber radio system | |
| US6859490B1 (en) | Method and system for wireless communications using different modulation techniques to provide guard times | |
| JP2995798B2 (en) | Assignment request multiple access method | |
| ZA831254B (en) | Telecommunications method and system | |
| JP2547437B2 (en) | Demand assign subscriber wireless system | |
| AU7577596A (en) | Digital telephony using control messages transmitted in time slots for rf frequency allocation | |
| JPS5846094B2 (en) | Meeting line configuration method for time division multiplexing phase modulation multidirectional wireless communication system | |
| RU2022475C1 (en) | Digital selective communication system | |
| JPH0263229A (en) | Burst signal communication equipment | |
| JPS58164343A (en) | Multiple access radio communication system |