JPS6333339B2 - - Google Patents
Info
- Publication number
- JPS6333339B2 JPS6333339B2 JP57045954A JP4595482A JPS6333339B2 JP S6333339 B2 JPS6333339 B2 JP S6333339B2 JP 57045954 A JP57045954 A JP 57045954A JP 4595482 A JP4595482 A JP 4595482A JP S6333339 B2 JPS6333339 B2 JP S6333339B2
- Authority
- JP
- Japan
- Prior art keywords
- station
- slave
- slave station
- wireless
- transmitter
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/18—Arrangements for synchronising broadcast or distribution via plural systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measuring Phase Differences (AREA)
- Mobile Radio Communication Systems (AREA)
- Radio Transmission System (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、無線通信系を利用してデータ信号を
伝送する方式に関する。特に、基地局間のデータ
信号遅延位相量を一定値に調整する方式に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a system for transmitting data signals using a wireless communication system. In particular, the present invention relates to a method for adjusting the amount of data signal delay phase between base stations to a constant value.
自動車無線等の移動無線では親局から同一のデ
ータ信号を有線回線を介して複数の子局に送り、
この信号をさらにそれぞれの子局から、同一の無
線周波数にて移動局に送信する方式がある。この
ときに、各子局から送られるデータ信号は同一位
相にそろえておく必要がある。
In mobile radio such as automobile radio, the same data signal is sent from a master station to multiple slave stations via wired lines.
There is a method in which this signal is further transmitted from each slave station to the mobile station using the same radio frequency. At this time, the data signals sent from each slave station must be aligned in the same phase.
このための、従来の方式として第１図に示すも
のが知られている。第１図は、従来例方式の要部
ブロツク構成図である。この図は各子局が同一構
成であることから２個の子局のみを代表的に示し
ている。すなわち、子局１1，１2内には遅延位相
量測定時のみに使用される２個の無線受信機２1，
３1および２2，３2が設けられるとともに、無線
送信機４1および４2とがそれぞれ設けられてい
る。 As a conventional method for this purpose, the one shown in FIG. 1 is known. FIG. 1 is a block diagram of the main parts of a conventional system. This figure representatively shows only two slave stations since each slave station has the same configuration. That is, in the slave stations 1 1 and 1 2 there are two radio receivers 2 1 and 2 used only for measuring the amount of delay phase.
3 1 and 2 2 , 3 2 are provided, and radio transmitters 4 1 and 4 2 are provided, respectively.
また、第１図で１１は親局であり、制御部１２
とこれに接続された位相差測定器１３とが設けら
れている。この制御部１２には、上り有線回線１
６1，１７1により無線受信機２1，３1、下り有線
回線１８1により無線送信機４1がそれぞれ接続さ
れている。同様に、この制御部１２には、上り有
線回線１６2，１７2により無線受信機２2，３2、
下り有線回線１８2により無線送信機４2がそれぞ
れ接続されている。また、下り有線回線１８1，
１８2には遅延回路１９1，１９2がそれぞれ挿入
されている。また、上り有線回線１６1，１７1，
１６2，１７2は前記位相差測定器１３に分岐して
導かれている。いま、第２の子局１2の位相調整
を行うには、親局１１から制御信号により第１の
子局１1、第２の子局１2の無線通話送信機４1，
４2を同時に動作させ、第２の子局１2の無線受信
機２2，３2で第１の子局１1および第２の子局１2
から送信される周波数f1，f2の送信信号を同時に
受信させる。これを別々の上り有線回線１６2，
１７2にて親局１１へ送り、親局１１の位相差測
定器１３で位相差を測定しその差を第２の子局１
２への下り有線回線１８2の遅延回路１９2に設定
する。 In addition, 11 in FIG. 1 is a master station, and a control unit 12
and a phase difference measuring device 13 connected thereto. This control unit 12 includes an uplink wired line 1
The wireless receivers 2 1 and 3 1 are connected by the 6 1 and 17 1 , and the wireless transmitter 4 1 is connected to the downlink wire line 18 1 , respectively. Similarly , this control unit 12 has wireless receivers 2 2 , 3 2 ,
Wireless transmitters 4 2 are connected to each other via downlink wire lines 18 2 . In addition, the downlink wired line 18 1 ,
Delay circuits 19 1 and 19 2 are inserted in 18 2 , respectively. In addition, uplink wired lines 16 1 , 17 1 ,
16 2 and 17 2 are branched and led to the phase difference measuring device 13. Now, in order to adjust the phase of the second slave station 1 2 , the wireless communication transmitter 4 1 of the first slave station 1 1 , the second slave station 1 2 ,
4 2 are operated simultaneously, and the wireless receivers 2 2 and 3 2 of the second slave station 1 2 operate the first slave station 1 1 and the second slave station 1 2 .
The transmission signals of frequencies f 1 and f 2 transmitted from the terminal are simultaneously received. This is connected to separate upstream wired lines 16 2 ,
17 2 to the master station 11, the phase difference measuring device 13 of the master station 11 measures the phase difference, and the difference is sent to the second slave station 1.
2 to the delay circuit 19 2 of the downlink cable line 18 2 .
しかし、このような従来方式では、各子局に無
線受信機が２台づつ必要となり、また、親局への
上り有線回線も２本づつ必要となり、システムコ
ストが高くなる欠点がある。
However, in such a conventional system, each slave station requires two wireless receivers, and two upstream wired lines to the master station are also required, resulting in an increase in system cost.
本発明はこの点を改良するもので、各子局で位
相調整に使用される無線受信機を１台とすること
ができ、上り有線回線を１本とすることができ、
保守が簡単化され、システムコストを低減するこ
とができる位相調整方式を提供することを目的と
する。 The present invention improves this point, and each slave station can use one wireless receiver for phase adjustment, and can use one uplink wired line.
It is an object of the present invention to provide a phase adjustment method that can simplify maintenance and reduce system costs.
本発明は、親局と、この親局に有線通信回線に
より接続された無線信号送信機を有する複数の子
局とが配置され、親局から発せられた信号が上記
有線通信回線を介して各子局に送られ各子局の上
記無線信号送信機から同一の周波数で上記信号の
位相が同一になるようにして送信される無線通信
方式で、上記各子局が送信する上記信号の位相が
同一であることを測定する方式において、上記親
局に二つの信号の位相差を測定する位相差測定器
を配し、上記各局に、通話チヤンネルの信号を送
信する無線通話送信機と、他の子局が送信する無
線信号を受信することができる無線受信機とを配
置し、はじめに、上記複数の子局のうちの１個の
子局である第１の子局の無線通話送信機を駆動し
この第１の子局の無線通話送信機に上記親局から
上記有線通信回線を介して特定信号を与え、上記
複数の子局のうち別の１個の子局である第２の子
局の無線受信機により上記第１の子局の無線通話
送信機の出力を受信し、この受信出力を上記有線
通信回線を介して上記親局に伝送し、上記親局で
は上記第１の子局に伝送した特定信号と上記第２
の子局から伝送される特定信号との位相差の測定
を実行し、次に、上記第２の子局の無線通話送信
機を駆動し、この第２の子局の無線通話送信機に
上記親局から上記有線通話回線を介して特定信号
を与え、上記第２の子局の無線受信機によりこの
第２の子局の無線通話送信機の出力を受信し、こ
の受信出力を上記親局へ伝送し、上記親局では上
記第２の子局に伝送した特定信号とこの第２の子
局から伝送される特定信号との位相差の測定を実
行し、この二つの測定の結果を比較することを特
徴とする。
In the present invention, a master station and a plurality of slave stations having wireless signal transmitters connected to the master station via a wired communication line are arranged, and signals emitted from the master station are transmitted to each of the slave stations via the wired communication line. A wireless communication method in which the signals sent to the slave stations are transmitted from the wireless signal transmitter of each slave station at the same frequency and in the same phase, and the phase of the signals transmitted by each slave station is the same. In the method of measuring the sameness, the master station is equipped with a phase difference measuring device that measures the phase difference between the two signals, and each station is equipped with a wireless communication transmitter that transmits the signal of the communication channel, and other stations. A wireless receiver capable of receiving wireless signals transmitted by the slave stations is arranged, and first, a wireless communication transmitter of a first slave station, which is one of the plurality of slave stations, is driven. A specific signal is applied from the master station to the wireless communication transmitter of the first slave station via the wired communication line, and a second slave station, which is another slave station among the plurality of slave stations, The wireless receiver receives the output of the wireless communication transmitter of the first slave station, transmits the received output to the master station via the wired communication line, and the master station transmits the output to the first slave station. The specific signal transmitted to
Measures the phase difference with the specific signal transmitted from the second slave station, then drives the wireless call transmitter of the second slave station, and transmits the above signal to the wireless call transmitter of the second slave station. A specific signal is given from the master station via the wired communication line, the output of the wireless communication transmitter of the second slave station is received by the wireless receiver of the second slave station, and this received output is transmitted to the master station. The master station measures the phase difference between the specific signal transmitted to the second slave station and the specific signal transmitted from the second slave station, and compares the results of these two measurements. It is characterized by
本発明の一実施例を図面に基づいて説明する。
第２図は、本発明一実施例の要部ブロツク構成図
である。この図は第１図と同様に２個の子局のみ
を示している。第１図で示した従来例と比較する
と、各子局の位相調整のみに使用する無線受信機
および上り有線回線がそれぞれ１つで構成された
ところに特徴がある。すなわち、子局１1，１2に
は移動局に制御信号を送出するための無線信号送
信機２１1，２１2と、無線通話送信機２２1，２
２2と、位相調整時に使用される無線受信機２３
１，２３2とがそれぞれ設けられている。また、子
局１1には制御部２５1が設けられ各送受信機２１
１，２２1，２３1にその出力が導かれている。同
様に、子局１2には制御部２５2が設けられ各送受
信機２１2，２２2，２３2にその出力が導かれて
いる。
An embodiment of the present invention will be described based on the drawings.
FIG. 2 is a block diagram of essential parts of an embodiment of the present invention. This figure, like FIG. 1, shows only two slave stations. Compared to the conventional example shown in FIG. 1, this system is unique in that it consists of one wireless receiver and one uplink wired line used only for phase adjustment of each slave station. That is, the slave stations 1 1 and 1 2 include radio signal transmitters 21 1 and 21 2 for sending control signals to the mobile stations, and radio call transmitters 22 1 and 2.
2 2 and a wireless receiver 23 used during phase adjustment
1 and 23 2 are provided, respectively. Further, the slave station 1 1 is provided with a control section 25 1 and each transmitter/receiver 21
The outputs are led to 1 , 22 1 and 23 1 . Similarly, the slave station 1 2 is provided with a control section 25 2 whose output is guided to each transceiver 21 2 , 22 2 , 23 2 .
また、親局１１内の制御部１２には制御回線２
６1，２６2により制御部２５1，２５2が、上り有
線回線２７1，２７2により無線受信機２３1，２
３2が、下り有線回線１８1，１８2により無線通
話送信機２２1，２２2および無線信号送信機２１
１，２１2がそれぞれ接続されている。 The control unit 12 in the master station 11 also has a control line 2.
Control units 25 1 and 25 2 are controlled by 6 1 and 26 2 , and wireless receivers 23 1 and 2 are controlled by uplink wired lines 27 1 and 27 2 .
3 2 is connected to the wireless call transmitters 22 1 , 22 2 and the wireless signal transmitter 21 via the downlink wired lines 18 1 , 18 2 .
1 and 21 2 are connected respectively.
他の構成は第１図に示す従来例と同様であり、
同一符号は同一のものをそれぞれ示す。 The other configurations are the same as the conventional example shown in FIG.
The same reference numerals indicate the same items.
このような構成で子局１1，１2から送信される
送信信号の位相調整を行うには、まず、親局１１
より子局１1，１2に対して制御回線１５1，１５2
によりチヤンネル対応に特定の周波数を有する無
線通話送信機２２1，２２2の周波数コードを問い
合わせ親局１１に記憶する。次に、親局１１より
制御回線２６2を使用して第２の子局１2の無線受
信機２３2に第１の子局１1の無線通話送信機２２
１の周波数コードを設定する。これにより、第２
の子局１2では第１の子局１1無線通話送信機２２
１の電波を受ける準備がされる。この状態で、第
１の子局１1に制御回線２６1を使用して無線信号
送信機２１1の入力を無線通話送信機２２1に与え
無線通話送信機２２1で送信させる。これにより、
親局１１より送出された特定信号が下り有線回線
１８1、無線通話送信機２２1、無線区間２８、無
線受信機２３2、上り有線回線２７2を経由する点
線で示すルートＡが形成される。親局１１は常時
下り有線回線１８1に流れている特定信号がこの
ルートＡを経由してもどつてくるまでの遅延位相
量を位相差測定器１３で測定し記憶する。この記
憶が終了すると、親局１１は制御回線２６1を使
用して無線通話送信機２７1を停止させる。 In order to adjust the phase of the transmission signals transmitted from the slave stations 1 1 and 1 2 in such a configuration, first, the master station 11
Control lines 15 1 , 15 2 for slave stations 1 1 , 1 2
Accordingly, the frequency codes of the wireless communication transmitters 22 1 and 22 2 having specific frequencies corresponding to the channels are stored in the inquiry master station 11 . Next, the master station 11 uses the control line 26 2 to transmit the wireless communication transmitter 22 of the first slave station 1 1 to the wireless receiver 23 2 of the second slave station 1 2 .
Set the frequency code of 1 . This allows the second
In the slave station 1 2 , the first slave station 1 1 wireless communication transmitter 22
Preparations are made to receive the first radio wave. In this state, the first slave station 1 1 uses the control line 26 1 to apply the input of the radio signal transmitter 21 1 to the radio call transmitter 22 1 to cause the radio call transmitter 22 1 to transmit. This results in
A route A shown by a dotted line is formed in which the specific signal sent from the master station 11 passes through the downlink wired line 18 1 , the wireless call transmitter 22 1 , the wireless section 28 , the wireless receiver 23 2 , and the uplink wired line 27 2 . The master station 11 uses the phase difference measuring device 13 to measure and store the delay phase amount until the specific signal that is constantly flowing on the downlink wire line 181 returns via this route A. When this storage is completed, the master station 11 uses the control line 26 1 to stop the wireless communication transmitter 27 1 .
次に親局１１より制御回線２６2を使用して第
２の子局１2の無線受信機２３2に無線通話送信機
２２2の周波数コードが設定される。これにより、
第２の子局１2では無線通話送信機２２2の電破を
受ける準備がされる。この状態で、親局１１は制
御回線２６2を使用して第２の子局１2の無線信号
送信機２１2の入力を無線通話送信機２２2に与え
無線通話送信機２２2を動作させる。これにより、
親局１１より送出された特定信号が下り有線回線
１８2、無線通話送信機２２2、無線区間２９、無
線受信機２３2、上り有線回線２７2を経由する破
線で示すルートＢが形成される。親局１１は特定
信号がこのルートＢを経由してもどつてくる遅延
位相量を位相差測定器１３で測定し記憶する。こ
の記憶が終了すると親局１１は制御回線２６2を
使用し、第２の子局１2の無線通話送信機２２2を
停止する。 Next, the frequency code of the wireless call transmitter 22 2 is set from the master station 11 to the wireless receiver 23 2 of the second slave station 1 2 using the control line 26 2 . This results in
The second slave station 1 2 is prepared to receive electrical damage to the wireless communication transmitter 22 2 . In this state, the master station 11 uses the control line 26 2 to apply the input of the wireless signal transmitter 21 2 of the second slave station 1 2 to the wireless communication transmitter 22 2 to operate the wireless communication transmitter 22 2 . . This results in
A route B shown by a broken line is formed in which the specific signal sent from the master station 11 passes through the downlink wired line 18 2 , the wireless call transmitter 22 2 , the wireless section 29, the wireless receiver 23 2 , and the uplink wired line 27 2 . The master station 11 uses a phase difference measuring device 13 to measure and store the amount of delay phase when the specific signal returns via this route B. When this storage is completed, the master station 11 uses the control line 26 2 to stop the wireless communication transmitter 22 2 of the second slave station 1 2 .
親局１１はこの記憶した位相量の差を求める。
この差は親局１１から送つた特定信号が無線区間
２８に到達する時間と無線区間２９に到達する時
間の差になり、この遅延位相差を下り有線回線１
８2の遅延回路１９2に設定し親局１１から無線区
間２８，２９に信号が到達する遅延量を同一にな
るよう調整し、無線信号送信機の遅延位相量が同
一となるよう調整する。 The master station 11 determines the difference between the stored phase amounts.
This difference is the difference between the time when the specific signal sent from the master station 11 reaches the wireless section 28 and the time when it reaches the wireless section 29.
The delay circuit 19 2 of 8 2 is set so that the delay amount of the signal reaching the wireless sections 28 and 29 from the master station 11 is adjusted to be the same, and the delay phase amount of the wireless signal transmitter is adjusted to be the same.
以上説明したように本発明によれば、親局と子
局間に制御回線を設けるとともに、子局内に特定
周波数を有する無線通話送信機を設け、子局間の
位相調整時に親局からの特定信号を各子局から時
分割的にその無線通話送信機から送信し、この受
信信号の位相差を検出して位相差を調整すること
とした。
As explained above, according to the present invention, a control line is provided between the master station and the slave station, and a wireless communication transmitter having a specific frequency is provided in the slave station, so that when adjusting the phase between the slave stations, the master station A signal is transmitted from each slave station in a time-division manner from its wireless communication transmitter, and the phase difference between the received signals is detected and adjusted.
したがつて、子局内の無線受信機を１個とする
ことができ、上り有線回線を１回線とすることが
できる。これにより保守も簡単化することがで
き、システムコストを低減することができる効果
を有する Therefore, the number of wireless receivers in the slave station can be reduced to one, and the number of uplink wired lines can be reduced to one. This simplifies maintenance and has the effect of reducing system costs.
第１図は従来例の要部ブロツク構成図。第２図
は本発明一実施例の要部ブロツク構成図。
１1，１2…子局、２1，２2，３1，３2，２３1，
２３2…無線受信機、４1，４2…無線送信機、１
１…親局、１２，２５1，２５2…制御部、１３…
位相差測定器、１６1，１６2，１７1，１７2，２
７1，２７2…上り有線回線、１８1，１８2…下り
有線回線、１９1，１９2…遅延回路、２１1，２
１2…無線信号送信機、２２1，２２2…無線通話
送信機、２６1，２６2…制御回線、２８，２９…
無線区間。
FIG. 1 is a block diagram of the main parts of a conventional example. FIG. 2 is a block diagram of essential parts of an embodiment of the present invention. 1 1 , 1 2 ... slave station, 2 1 , 2 2 , 3 1 , 3 2 , 23 1 ,
23 2 ... Radio receiver, 4 1 , 4 2 ... Radio transmitter, 1
1... Master station, 12, 25 1 , 25 2 ... Control unit, 13...
Phase difference measuring device, 16 1 , 16 2 , 17 1 , 17 2 , 2
7 1 , 27 2 ... Uplink wired line, 18 1 , 18 2 ... Downlink wired line, 19 1 , 19 2 ... Delay circuit, 21 1 , 2
1 2 ... Radio signal transmitter, 22 1 , 22 2 ... Wireless communication transmitter, 26 1 , 26 2 ... Control line, 28, 29...
wireless section.
Claims (1)
された無線信号送信機を有する複数の子局とが配
置され、親局から発せられた信号が上記有線通信
回線を介して各子局に送られ各子局の上記無線信
号送信機から同一の周波数で上記信号の位相が同
一になるようにして送信される無線通信方式で、
上記各子局が送信する上記信号の位相が同一であ
ることを測定する方式において、 上記親局に二つの信号の位相差を測定する位相
差測定器を配し、 上記各局に、通話チヤンネルの信号を送信する
無線通話送信機と、他の子局が送信する無線信号
を受信することができる無線受信機とを配置し、 はじめに、 上記複数の子局のうちの１個の子局である第１
の子局の無線通話送信機を駆動しこの第１の子局
の無線通話送信機に上記親局から上記有線通信回
線を介して特定信号を与え、 上記複数の子局のうち別の１個の子局である第
２の子局の無線受信機により上記第１の子局の無
線通話送信機の出力を受信し、 この受信出力を上記有線通信回線を介して上記
親局に伝送し、 上記親局では上記第１の子局に伝送した特定信
号と上記第２の子局から伝送される特定信号との
位相差の測定を実行し、 次に、 上記第２の子局の無線通話送信機を駆動し、こ
の第２の子局の無線通話送信機に上記親局から上
記有線通話回線を介して特定信号を与え、上記第
２の子局の無線受信機によりこの第２の子局の無
線通話送信機の出力を受信し、この受信出力を上
記親局へ伝送し、上記親局では上記第２の子局に
伝送した特定信号とこの第２の子局から伝送され
る特定信号との位相差の測定を実行し、 この二つの測定の結果を比較する ことを特徴とする位相差測定方式。[Scope of Claims] 1. A master station and a plurality of slave stations each having a wireless signal transmitter connected to the master station via a wired communication line are arranged, and a signal emitted from the master station is transmitted through the wired communication line. A wireless communication method in which the signals are sent to each slave station via the radio signal transmitter of each slave station at the same frequency and in the same phase,
In the method of measuring whether the phases of the signals transmitted by each of the slave stations are the same, the master station is equipped with a phase difference measuring device that measures the phase difference between the two signals, and each of the stations has a communication channel. A wireless communication transmitter that transmits signals and a wireless receiver that can receive wireless signals transmitted by other slave stations are arranged, and first, one slave station among the plurality of slave stations 1st
drive the wireless communication transmitter of the first slave station, apply a specific signal from the master station to the wireless communication transmitter of the first slave station via the wired communication line, and drive another one of the plurality of slave stations. A wireless receiver of a second slave station, which is a slave station, receives the output of the wireless communication transmitter of the first slave station, and transmits the received output to the master station via the wired communication line, The master station measures the phase difference between the specific signal transmitted to the first slave station and the specific signal transmitted from the second slave station, and then A transmitter is driven, a specific signal is given from the master station to the wireless communication transmitter of the second slave station via the wired communication line, and the wireless receiver of the second slave station transmits a specific signal to the wireless communication transmitter of the second slave station. The output of the wireless communication transmitter of the station is received, and this received output is transmitted to the master station, and the master station receives the specific signal transmitted to the second slave station and the specific signal transmitted from the second slave station. A phase difference measurement method characterized by measuring the phase difference with a signal and comparing the results of these two measurements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57045954A JPS58162139A (en) | 1982-03-23 | 1982-03-23 | System for measuring phase difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57045954A JPS58162139A (en) | 1982-03-23 | 1982-03-23 | System for measuring phase difference |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58162139A JPS58162139A (en) | 1983-09-26 |
| JPS6333339B2 true JPS6333339B2 (en) | 1988-07-05 |
Family
ID=12733664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57045954A Granted JPS58162139A (en) | 1982-03-23 | 1982-03-23 | System for measuring phase difference |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58162139A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62141827A (en) * | 1985-12-16 | 1987-06-25 | Nippon Telegr & Teleph Corp <Ntt> | System and device for mobile radio communication |
| JP2501192B2 (en) * | 1986-01-22 | 1996-05-29 | 日本電気株式会社 | Inter-station synchronization method |
| JPS62275217A (en) * | 1986-01-30 | 1987-11-30 | Canon Inc | Picture reader |
| JPS6461130A (en) * | 1987-09-01 | 1989-03-08 | Nippon Telegraph & Telephone | Phase correction system |
| JP2594064B2 (en) * | 1987-10-13 | 1997-03-26 | 日本電信電話株式会社 | Mobile communication control method |
| JPH01264025A (en) * | 1988-04-14 | 1989-10-20 | Nec Corp | Phase supervision system between fixed stations |
| JP3001204B2 (en) * | 1988-10-04 | 2000-01-24 | 日本電気株式会社 | Phase adjustment device |
| JPH0779319B2 (en) * | 1992-07-06 | 1995-08-23 | 朝日放送株式会社 | Broadcasting system |
| CN100367038C (en) * | 2004-06-30 | 2008-02-06 | 武汉理工大学 | A method and device for synchronous phase measurement using optical signals |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54102907A (en) * | 1978-01-31 | 1979-08-13 | Nec Corp | Adjusting method for inter-station delay phase amount |
-
1982
- 1982-03-23 JP JP57045954A patent/JPS58162139A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58162139A (en) | 1983-09-26 |
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