JPH073959B2 - Mobile communication system - Google Patents
Mobile communication systemInfo
- Publication number
- JPH073959B2 JPH073959B2 JP61277044A JP27704486A JPH073959B2 JP H073959 B2 JPH073959 B2 JP H073959B2 JP 61277044 A JP61277044 A JP 61277044A JP 27704486 A JP27704486 A JP 27704486A JP H073959 B2 JPH073959 B2 JP H073959B2
- Authority
- JP
- Japan
- Prior art keywords
- base station
- output
- leaky coaxial
- mobile station
- coaxial cable
- 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 - Lifetime
Links
Landscapes
- Near-Field Transmission Systems (AREA)
- Radio Transmission System (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、移動体デイジタル通信におけるダイバシチ
ー方式に関するものである。The present invention relates to a diversity system in mobile digital communication.
第２図は例えば「新幹線の電子制御・通信システム」
（渡邊壽夫著）の119ページに記載されているLCX方式移
動局装置の系統図であり、（１）はLCX、（２）はLCX
（１）の損失を補償する中継機、（３）は基地局送信
機、（４）は基地局受信機、（５）は基地局分波器、
（６）は分配及び合成用ハイブリツド、（７）は移動局
送信機、（８）は移動局分波器、（９）は移動局受信
機、（10）は移動局受信合成器、（11）は移動局空中
線、（12）は高周波スイッチ、（13）は障害物、（20）
は移動体である。Figure 2 shows, for example, "Shinkansen electronic control and communication systems."
FIG. 1 is a system diagram of an LCX type mobile station device described on page 119 of (Toshio Watanabe), where (1) is LCX and (2) is LCX.
A repeater for compensating for the loss in (1), (3) a base station transmitter, (4) a base station receiver, (5) a base station demultiplexer,
(6) Hybrid for distribution and combination, (7) Mobile station transmitter, (8) Mobile station demultiplexer, (9) Mobile station receiver, (10) Mobile station reception combiner, (11) ) Is a mobile station antenna, (12) is a high frequency switch, (13) is an obstacle, (20)
Is a moving body.
次に動作について説明する。基地局送信機（３）より送
出された基地から移動方向の電波F1は、基地局分波器
（５），ハイブリツド（６）,LCY（１）を経て漏洩電波
となつて移動体（20）の両側に設けられた空中線に到達
する。Next, the operation will be described. The radio wave F 1 sent from the base station transmitter (3) in the moving direction from the base passes through the base station demultiplexer (5), the hybrid (6), and the LCY (1) to be a leaking radio wave, and is transmitted to the moving body (20 ) To reach the antennas on both sides.
さらに電波F1は移動局分波器（８）を通り、移動局受信
機（９）で復調されてRD1（受信データ）及びRT1（受信
クロツク）となり、最後に受信合成器（10）で受信電界
の強い方のRD及びRTのみを取り出す。次に、移動局送信
機（７）より送出された移動から基地方向の電波F2は、
高周波スイツチ（12）によりその送出方向の空中線系を
決定され、（この場合２台の受信機（９）の電界の強い
方を高周波スイツチ（12）は自動的に選択する。）移動
局分波器（８）、空中線（11）、LCX（１）、ハイブリ
ツド（６）、基地局分波器（５）を経て、基地局受信機
（４）に入り、復調されてRD2及びRT2となる。Further, the radio wave F 1 passes through the mobile station demultiplexer (8), is demodulated by the mobile station receiver (9) and becomes RD 1 (reception data) and RT 1 (reception clock), and finally the reception synthesizer (10). Take out only RD and RT with the strongest received electric field. Next, the radio wave F 2 transmitted from the mobile station transmitter (7) toward the base from the movement is
The antenna system in the transmitting direction is determined by the high frequency switch (12) (in this case, the high frequency switch (12) automatically selects the one with the stronger electric field of the two receivers (9)). After passing through the device (8), antenna (11), LCX (1), hybrid (6) and base station demultiplexer (5), it enters the base station receiver (4) and is demodulated to RD 2 and RT 2 . Become.
以上の様にして基地局と移動体（20）間でデイジタル通
信が行われる。Digital communication is performed between the base station and the mobile body (20) as described above.
従来の移動体デイジタル通信装置は以上の様に構成され
ていたので、基地局から移動局方向の電波に対しては、
移動局の複数の空中線を利用してスペース・ダイバシチ
ー受信が行えるが、移動局から基地局の電波に対して
は、ダイバシチー受信が行えず、LCX（１）と移動局空
中線（11）の間に障害物（13）等が存在する場合には電
界レベルが落ち込み、デイジタル通信のBER（ビツト誤
り率）を悪化させる等の問題が有つた。Since the conventional mobile digital communication device is configured as described above, for the radio wave from the base station to the mobile station,
Space diversity reception can be performed by using multiple antennas of the mobile station, but diversity reception cannot be performed for radio waves from the mobile station to the base station, and between the LCX (1) and the mobile station antenna (11). When there is an obstacle (13), the electric field level drops, and there is a problem that the BER (bit error rate) of digital communication is deteriorated.
この発明は上記の様な問題点を解消するためになされた
もので、移動局から基地局方向の電波に対しても、ダイ
バシチー受信が可能な移動体通信方式を得ることを目的
とする。The present invention has been made to solve the above problems, and an object thereof is to obtain a mobile communication system capable of diversity reception even with respect to a radio wave from a mobile station to a base station.
この発明に係る移動体通信方式は、移動局より基地局に
送出する電波を周波数変換し、その周波数変換前後の電
波を２条のLGXを介してそれぞれ別々に伝送し、基地局
でスペース及び周波数ダイバシチー受信を行う様にした
ものである。The mobile communication system according to the present invention frequency-converts a radio wave transmitted from a mobile station to a base station, and separately transmits the radio waves before and after the frequency conversion through two LGXs, and the base station transmits space and frequency. It is designed to receive diversity.
この発明におけるダイバシチー受信は、デイジタル通信
におけるBECの改善、即ち、高品質デイジタル回線を実
現する。The diversity reception in the present invention realizes improvement of BEC in digital communication, that is, a high quality digital line.
以下、この発明の一実施例を図について説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図において、（14）は局部発振器、（15）は混合
器、（16）は帯域通過濾波器、（17）は新しい周波数
（F3）用の基地局受信機、（18）は基地局受信合成器で
ある。In FIG. 1, (14) is a local oscillator, (15) is a mixer, (16) is a bandpass filter, (17) is a base station receiver for a new frequency (F 3 ), and (18) is a base station. It is a station reception synthesizer.
次に動作について説明する。基地局から移動局方向のダ
イバチー方式については従来技術と同じである。Next, the operation will be described. The diversity method from the base station to the mobile station is the same as the conventional technique.
移動局から基地局方向は、従来、高周波スイツチで切り
替えて、片方向にのみ電波F2を送出していたが、本発明
ではF2をハイブリツド（６）、局部発振器（14）、混合
器（15）、及び帯域通過濾波器（16）によりF3に変換
し、もの片方（F2を送出した方向と反対方向）に送出す
る。Conventionally, the direction from the mobile station to the base station was switched by a high-frequency switch, and the radio wave F 2 was transmitted only in one direction. However, in the present invention, F 2 is hybrid (6), local oscillator (14), mixer ( 15) and the band pass filter (16) to convert it to F 3 and send it to one side (the direction opposite to the direction of sending F 2 ).
一方、基地局では従来のF2を受信する受信機（４）の他
にハイブリツド（６）,F3を受信する受信機（17）及び
基地局受信合成器（18）を追加し、移動局から基地局方
向の回線についても、基地局から移動局方向の回線と同
様、ダイバシチー受信を行う。On the other hand, in the base station, in addition to the conventional receiver (4) for receiving F 2 , a receiver (17) for receiving the hybrid (6) and F 3 and a base station reception synthesizer (18) are added to the mobile station. For the line from the base station to the base station, diversity reception is performed similarly to the line from the base station to the mobile station.
この様に、移動局から基地局方向の回線にもダイバシチ
ー受信機能を追加することにより、移動局空中線（11）
とLCX（１）の間に、障害物（13）が存在し、F2電波が
遮蔽された場合でもF3電波により情報を受信し、デイジ
タル通信におけるBERの増加は招かず、高品質の通信が
行える。In this way, by adding the diversity reception function to the line from the mobile station to the base station, the mobile station antenna (11)
Even if the obstacle (13) exists between the LCX (1) and the LCX (1) and the F 2 radio wave is shielded, the information is received by the F 3 radio wave and the BER in digital communication does not increase, resulting in high quality communication. Can be done.
なお上記実施例ではLCXを用いた通信回線の移動局から
基地局方向のダイバシチー方式について説明したが、こ
れは一般の空間波方式の通信回線に適用しても上記実施
例と同様の効果を奏する。In the above embodiment, the diversity system in the direction from the mobile station to the base station of the communication line using the LCX has been described, but this has the same effect as the above embodiment even when applied to a general space wave communication line. .
以上の様に、この発明によれば、LCXを用いた通信回線
において、移動局から基地局方向の回線にも、ダイバシ
チー効果を持たせたので、基地局と移動局間の双方向通
信において、BERの良好なデイジタル通信回線を構成で
きる効果がある。As described above, according to the present invention, in the communication line using the LCX, the line in the direction from the mobile station to the base station also has the diversity effect, so in the bidirectional communication between the base station and the mobile station, This has the effect of configuring a digital communication line with a good BER.
第１図はこの発明の一実施例によるLCX方式双方向通信
ダイバシチー方式を示す系統図、第２図は従来のLCX方
式双方向通信を示す系統図である。 （１）はLCX、（２）は中継機、（３）は基地局送信
機、（４）は基地局受信機、（５）は基地局分波器、
（６）はハイブリツド、（７）は移動局送信機、（８）
は移動局分波器、（９）は移動局受信機、（10）は移動
局受信合成器、（11）は移動局空中線、（13）は障害
物、（14）は局部発振器、（15）は混合器、（16）は帯
域通過濾波器、（17）は基地局受信機、（18）は基地局
受信合成器を示す。 なお、図中同一符号は同一、又は相当部分を示す。FIG. 1 is a system diagram showing an LCX bidirectional communication diversity system according to an embodiment of the present invention, and FIG. 2 is a system diagram showing a conventional LCX bidirectional communication. (1) LCX, (2) repeater, (3) base station transmitter, (4) base station receiver, (5) base station demultiplexer,
(6) is a hybrid, (7) is a mobile station transmitter, (8)
Is a mobile station demultiplexer, (9) is a mobile station receiver, (10) is a mobile station reception combiner, (11) is a mobile station antenna, (13) is an obstacle, (14) is a local oscillator, and (15) ) Is a mixer, (16) is a bandpass filter, (17) is a base station receiver, and (18) is a base station reception combiner. The same reference numerals in the drawings indicate the same or corresponding parts.
Claims (1)
第２の漏洩同軸ケーブルを介し、上記移動路を移動する
移動体と基地局との間でダイバシチー受信する移動体通
信方式において、上記移動体は、上記第１及び第２の漏
洩同軸ケーブルとの間で送信信号を出力し、受信信号を
受信する第１及び第２の空中線と、これら第１及び第２
の空中線にそれぞれ接続された第１及び第２の受信機
と、上記第１及び第２の空中線に接続された送信機と、
この送信機の出力を分配する分配器と、この分配器から
の一方の分配出力を周波数変換する周波数変換回路と、
この周波数変換回路の出力を分波し、上記第１の空中線
から上記第１の漏洩同軸ケーブルへ送信すると共に、上
記第１の漏洩同軸ケーブルからの受信信号を上記第１の
受信機へ出力する第１の分波器と、上記分配器からの他
方の分配出力を上記第２の空中線から上記第２の漏洩同
軸ケーブルへ送信すると共に、上記第２の漏洩同軸ケー
ブルからの受信信号を上記第２の受信機へ出力する第２
の分波器とを備えたことを特徴とする移動体通信方式。1. A mobile communication system in which diversity reception is performed between a mobile body moving along the moving path and a base station via first and second leaky coaxial cables laid along both sides of the moving path. The mobile body outputs first and second antennas that output a transmission signal to and receive the reception signal from the first and second leaky coaxial cables, and the first and second antennas.
First and second receivers respectively connected to the antennas, and transmitters connected to the first and second antennas,
A distributor that distributes the output of this transmitter, and a frequency conversion circuit that frequency-converts one distribution output from this distributor,
The output of the frequency conversion circuit is demultiplexed, transmitted from the first antenna to the first leaky coaxial cable, and the reception signal from the first leaky coaxial cable is output to the first receiver. The first duplexer and the other split output from the splitter are transmitted from the second antenna to the second leaky coaxial cable, and the received signal from the second leaky coaxial cable is sent to the second leaky coaxial cable. Second output to the second receiver
A mobile communication system, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61277044A JPH073959B2 (en) | 1986-11-19 | 1986-11-19 | Mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61277044A JPH073959B2 (en) | 1986-11-19 | 1986-11-19 | Mobile communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63129727A JPS63129727A (en) | 1988-06-02 |
| JPH073959B2 true JPH073959B2 (en) | 1995-01-18 |
Family
ID=17578002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61277044A Expired - Lifetime JPH073959B2 (en) | 1986-11-19 | 1986-11-19 | Mobile communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073959B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5783938A (en) * | 1980-11-14 | 1982-05-26 | Hitachi Denshi Ltd | Diversity system by leakage coaxial cable |
| JPH0644729B2 (en) * | 1985-02-15 | 1994-06-08 | 三菱電機株式会社 | Diversity reception system using leaky coaxial cable |
-
1986
- 1986-11-19 JP JP61277044A patent/JPH073959B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63129727A (en) | 1988-06-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |