JPH0820503B2 - Earth station transmitter / receiver for satellite navigation and satellite communications - Google Patents
Earth station transmitter / receiver for satellite navigation and satellite communicationsInfo
- Publication number
- JPH0820503B2 JPH0820503B2 JP62189462A JP18946287A JPH0820503B2 JP H0820503 B2 JPH0820503 B2 JP H0820503B2 JP 62189462 A JP62189462 A JP 62189462A JP 18946287 A JP18946287 A JP 18946287A JP H0820503 B2 JPH0820503 B2 JP H0820503B2
- Authority
- JP
- Japan
- Prior art keywords
- satellite
- receiver
- communication
- navigation
- satellite navigation
- 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 - Fee Related
Links
Description
【発明の詳細な説明】 （ａ）産業上の利用分野 この発明は、GPSなどの衛星航法用及びインマルサッ
トなどの衛星通信用地球局の送受信装置に関する。TECHNICAL FIELD The present invention relates to a transmitter / receiver of an earth station for satellite navigation such as GPS and for satellite communication such as Inmarsat.
（ｂ）従来の技術 従来、NAVSTAR/GPS（全世界測位システム）等の航法
衛星を利用して船舶などの測位を行う測位装置が開発さ
れている。(B) Conventional Technology Conventionally, a positioning device for positioning a ship using a navigation satellite such as NAVSTAR / GPS (Global Positioning System) has been developed.
第３図はこのようなシステムに用いられるGPS受信機
の構成を表すブロック図である。図においてアンテナユ
ニット内には、GPS衛星から送信される電波を受けるア
ンテナ１とアンテナ１の受信信号を増幅する低雑音増幅
器２が設けられている。一方、受信機内には局部発信器
４とダウンコンバータ３および航法データの再生や擬似
距離データなどを検出するデータ検出部５が設けられて
いる。FIG. 3 is a block diagram showing the configuration of a GPS receiver used in such a system. In the figure, in the antenna unit, an antenna 1 for receiving radio waves transmitted from GPS satellites and a low noise amplifier 2 for amplifying a received signal of the antenna 1 are provided. On the other hand, the receiver is provided with a local oscillator 4, a down converter 3, and a data detector 5 for detecting reproduction of navigation data and pseudo range data.
ところで、海上と陸上との間で通信を行う際、近い将
来導入が予定されているシステムとしてインマルサット
スタンダードＣがある。第４図はこのシステムで用い
られる衛星通信用送受信機（船舶地球局）の構成を表す
ブロック図である。図において６はイルマルサットの通
信衛星との間で送受信を行うアンテナ、７はダイプレク
サ（アンテナ共同器）である。11は局部発信器、10はア
ップコンバータ、８は高出力増幅器である。また、９は
低雑音増幅器、12はダウンコンバータであり、これらは
船上装置内に設けられている。船内装置には通信衛星と
の間で通信制御を行うための通信制御信号処理部13が設
けられている。なお、イルマンサット スタンダードＣ
の使用する周波数帯域とダイプレクサ７の周波数特性は
第５図に示す通りである。図に示すように受信帯域は15
30〜1545MHzで送信帯域は1626.5〜1646.5MHzであり、こ
の帯域の信号を選択的に通過させるようにダイプレクサ
の周波数特性が設定されている。By the way, there is Inmarsat Standard C as a system that is scheduled to be introduced in the near future when communicating between the sea and land. FIG. 4 is a block diagram showing the configuration of a satellite communication transceiver (ship earth station) used in this system. In the figure, 6 is an antenna for transmitting and receiving data to and from the Ilmarsat communication satellite, and 7 is a diplexer (antenna joint device). 11 is a local oscillator, 10 is an up converter, and 8 is a high-power amplifier. Further, 9 is a low noise amplifier, and 12 is a down converter, which are provided in the onboard equipment. The onboard device is provided with a communication control signal processing unit 13 for controlling communication with a communication satellite. In addition, Ilmansat Standard C
The frequency band used by and the frequency characteristics of the diplexer 7 are as shown in FIG. As shown in the figure, the reception band is 15
The transmission band is 1626.5 to 1646.5 MHz at 30 to 1545 MHz, and the frequency characteristic of the diplexer is set so as to selectively pass signals in this band.
このように船舶には衛星航法用の受信機と、衛星通信
用の送受信機を備え、それぞれ別個に用いられる。In this way, the ship is equipped with a satellite navigation receiver and a satellite communication transceiver, which are used separately.
（ｃ）発明が解決しようとする問題点 航法衛星と通信衛星では、その利用目的や方法が異な
るが、使用される周波数帯域や偏波方式、更に、受信レ
ベルなどが同一または近似している場合がある。たとえ
ばGPSの受信帯域は1575.42±1.1）MHz、送信電波は右旋
円偏波、受信信号レベルは−130〜−120dBmである。更
にアンテナは無指向性,0〜1dBiのものを使用する。この
場合に要求される前記低雑音増幅器の性能はNF3dB以
下，利得50dBである。一方、インマルサット スタンダ
ードＣの場合、使用帯域は第５図に示した通りであり、
衛星からの送信電波は右旋円偏波、信号レベルは−130
〜−110dBmである。更に、アンテナは無指向性,0〜1dBi
の利得のものを使用する。この場合に要求される前記低
雑音増幅器のNFは0.8〜1dB,利得は40dBである。(C) Problems to be solved by the invention When the navigation satellite and the communication satellite have different purposes and methods of use, but the frequency band and polarization method used and the reception level are the same or similar. There is. For example, the GPS reception band is 1575.42 ± 1.1) MHz, the transmitted radio waves are right-handed circularly polarized waves, and the reception signal level is −130 to −120 dBm. In addition, the antenna used is omnidirectional and 0-1 dBi. In this case, the performance of the low noise amplifier required is NF 3 dB or less and a gain of 50 dB. On the other hand, in the case of Inmarsat Standard C, the band used is as shown in FIG.
Radio waves transmitted from the satellite are right-hand circularly polarized waves, and the signal level is -130.
~ -110 dBm. In addition, the antenna is omnidirectional, 0-1 dBi
Use the one with the gain of. In this case, the NF of the low noise amplifier required is 0.8 to 1 dB and the gain is 40 dB.
このように周波数帯域が隣接し、同一偏波方式を用
い、且つ受信レベルがほぼ等しい場合、衛星航法用受信
機と衛星通信用送受信機の一部は重複することとなる。When the frequency bands are adjacent to each other, the same polarization method is used, and the reception levels are substantially equal to each other, the satellite navigation receiver and the satellite communication transceiver partially overlap.
この発明の目的は、衛星航法用受信機と衛星通信用受
信機の構成要素の一部を共用し、装置全体を簡略化する
とともに小型化できるようにした衛星航法用及び衛星通
信用地球局の送受信装置を提供することにある。An object of the present invention is to provide a satellite navigation and satellite communication earth station that shares some of the constituent elements of the satellite navigation receiver and the satellite communication receiver to simplify the entire apparatus and reduce the size thereof. It is to provide a transceiver.
（ｄ）問題点を解決するための手段 この発明の衛星航法用及び衛星通信用地球局の送受信
装置は、航法衛星からの受信と通信衛星に対する送受信
を行う共通のアンテナと、 衛星通信用送信周波帯域に通過帯域を有し、衛星通信
用受信周波数帯域と衛星航法用受信周波数帯域をカバー
する通過帯域を有するダイプレクサと、 ダイプレクサから出力された受信信号を増幅する低雑
音増幅器と、 この低雑音増幅器の出力信号を二分割し、一方を通信
制御信号処理部へ供給し、他方を衛星航法受信機に供給
する分割器と、 該分割器と衛星航法受信機の間に挿入されるレベル補
正用増幅器と、 を設けたことを特徴としている。(D) Means for Solving the Problems The transmitting / receiving device of the satellite navigation and satellite communication earth station according to the present invention has a common antenna for receiving and transmitting from the navigation satellite and the transmitting frequency for satellite communication. A diplexer having a pass band in the band and a pass band covering the reception frequency band for satellite communication and the reception frequency band for satellite navigation, a low noise amplifier for amplifying the reception signal output from the diplexer, and this low noise amplifier Of the output signal of the above, and one of which is supplied to the communication control signal processing unit and the other of which is supplied to the satellite navigation receiver, and a level correction amplifier inserted between the divider and the satellite navigation receiver. And are provided.
（ｅ）作用 この発明の衛星航法用及び衛星通信用地球局の送受信
装置において、共通のアンテナにより航法衛星からの受
信と通信衛星に対する送受信を行い、ダイプレクサは、
送信の際、衛星通信用送信周波数帯域を通過させ、受信
の際、衛星通信用受信周波数帯域と衛星航法用受信周波
数帯域を通過させる。更に低雑音増幅器は、ダイプレク
サから出力された受信信号を増幅し、分割器は、低雑音
増幅器の出力信号を二分割し、一方を通信制御信号処理
部へ供給し、他方を衛星航法受信機側へ供給する。そし
て衛星航法受信機側ではレベル補正用増幅器でこの信号
を更に増幅する。これにより、信号レベルが衛星航法受
信機が十分に処理可能なレベルにまで増幅される。これ
により、アンテナと低雑音増幅器が共用され、装置の簡
略化および小型化を図ることができる。(E) Action In the transmitter / receiver of the satellite navigation and satellite communication earth station of the present invention, the diplexer performs reception from the navigation satellite and transmission / reception to / from the communication satellite by the common antenna.
At the time of transmission, the satellite communication transmission frequency band is passed, and at the time of reception, the satellite communication reception frequency band and the satellite navigation reception frequency band are passed. Furthermore, the low noise amplifier amplifies the received signal output from the diplexer, and the divider divides the output signal of the low noise amplifier into two parts, one of which is supplied to the communication control signal processing unit and the other of which is provided on the satellite navigation receiver side. Supply to. Then, on the satellite navigation receiver side, this signal is further amplified by a level correction amplifier. This amplifies the signal level to a level that the satellite navigation receiver can handle sufficiently. As a result, the antenna and the low-noise amplifier are shared, and the device can be simplified and downsized.
（ｆ）実施例 この発明の実施例である衛星航法用及び衛星通信用地
球局の送受信装置のブロック図を第１図に示す。この実
施例はGPSにより衛星航法を行い、インマルサット ス
タンダードＣを用いて衛星通信を行う送受信装置であ
る。送受信装置は、船上装置，船内装置，およびGPS受
信機から構成されている。船上装置はアンテナ14,ダイ
プレクサ15,高出力増幅器16,低雑音増幅器17,分割器18,
局部発信器20,アップコンバータ19,ダウンコンバータ21
が設けられている。また、船内装置にはインマルサット
通信衛星との間で通信制御を行うための通信制御信号処
理部22が設けられている。更に、GPS受信機にはＬバン
ド増幅器23,局部発信器25,ダウンコンバータ24およびデ
ータ検出部26が設けられている。(F) Embodiment FIG. 1 shows a block diagram of a transmitting / receiving device of an earth station for satellite navigation and satellite communication which is an embodiment of the present invention. This embodiment is a transmitting / receiving device that performs satellite navigation by GPS and uses Inmarsat standard C for satellite communication. The transceiver device is composed of an onboard device, an inboard device, and a GPS receiver. The onboard equipment consists of antenna 14, diplexer 15, high-power amplifier 16, low-noise amplifier 17, divider 18,
Local oscillator 20, up converter 19, down converter 21
Is provided. Further, the onboard device is provided with a communication control signal processing unit 22 for performing communication control with the Inmarsat communication satellite. Further, the GPS receiver is provided with an L band amplifier 23, a local oscillator 25, a down converter 24 and a data detection unit 26.
アンテナ14は無指向性で利得０〜1dBiの右旋円偏波ア
ンテナである。ダイプレクサ15は送受信信号をそれぞれ
の回路に振り分けるフィルタである。このダイプレクサ
15の特性は第２図に示す通りである。すなわち受信側の
周波数特性はインマルサットの受信帯域である1530〜15
45MHzの帯域と、GPS受信帯域である1575.42±1.1MHzを
通過させる特性を備え、送信側の周波数特性はインマル
サットの送信帯域である1626.5〜1646.5MHzの帯域を通
過させる。The antenna 14 is a non-directional right-handed circularly polarized antenna having a gain of 0 to 1 dBi. The diplexer 15 is a filter that distributes a transmission / reception signal to each circuit. This diplexer
The characteristics of 15 are as shown in FIG. That is, the frequency characteristic on the receiving side is 1530 to 15 which is the receiving band of Inmarsat.
It has the characteristic of passing the 45MHz band and the GPS receiving band of 1575.42 ± 1.1MHz, and the frequency characteristic of the transmitting side passes the band of 1626.5 to 1646.5MHz which is the transmission band of Inmarsat.
低雑音増幅器17の利得は44dB,NFは0.8〜1dBである。
低雑音増幅器17の出力は分割器18を通してダウンコンバ
ータ21とGPS受信機のＬバンド増幅器23にそれぞれ供給
されている。分割器18によって4dB（1dBは損失）減衰さ
れて、40dBの信号が21と23に供給される。GPS受信機に
要求される信号レベルは50dBであるが、Ｌバンド増幅器
23によって不足分の10dB更に増幅されてダウンコンバー
タ24に供給される。低雑音増幅器17のNF値0.8〜1dBはGP
S受信機に必要なNF値（3dB以下）より良好であるため、
これをGPS受信信号に利用することは全く問題がなく、
かえってGPSの測位範囲を広げるという効果がある。The gain of the low noise amplifier 17 is 44 dB, and the NF is 0.8 to 1 dB.
The output of the low noise amplifier 17 is supplied to a down converter 21 and an L band amplifier 23 of the GPS receiver through a divider 18, respectively. A 40 dB signal is provided to 21 and 23 with 4 dB (1 dB loss) attenuation by divider 18. The signal level required for a GPS receiver is 50 dB, but an L-band amplifier
It is further amplified by the shortage of 10 dB by 23 and supplied to the down converter 24. The NF value of the low noise amplifier 17 is 0.8 to 1 dB is GP
Since it is better than the NF value (3 dB or less) required for the S receiver,
There is no problem to use this for GPS reception signal,
On the contrary, it has the effect of expanding the GPS positioning range.
（ｇ）発明の効果 以上のようにこの発明によれば、衛星航法受信機側に
レベル補正用増幅器を挿入したことにより、周波数や偏
波がほぼ供給の衛星航法信号と衛星通信信号との仕様の
相違点（たとえば、NFや利得）を補償できるため、アン
テナと低雑音増幅器を共用して、衛星航法と衛星通信を
同時に行うことができる。これにより送受信装置の簡略
化および小型化を図ることができる。(G) Effect of the Invention As described above, according to the present invention, by inserting the level correction amplifier in the satellite navigation receiver side, the specifications of the satellite navigation signal and the satellite communication signal whose frequency and polarization are almost supplied. Since the difference (for example, NF and gain) can be compensated for, satellite navigation and satellite communication can be performed simultaneously by sharing the antenna and the low noise amplifier. As a result, the transceiver device can be simplified and downsized.
第１図はこの発明の実施例である衛星航法用及び衛星通
信用地球局の送受信装置のブロック図、第２図は同送受
信装置に用いられるダイプレクサの周波数特性の一例を
表す図、第３図は従来の衛星航法用受信機のブロック
図、第４図は従来の衛星通信用送受信機のブロック図、
第５図は従来の衛星通信用送受信機に用いられるダイプ
レクサの周波数特性の一例を表す図である。 14……アンテナ、 15……ダイプレクサ、 17……低雑音増幅器。1 is a block diagram of a transmitter / receiver of an earth station for satellite navigation and satellite communication according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of frequency characteristics of a diplexer used in the transmitter / receiver, and FIG. Is a block diagram of a conventional satellite navigation receiver, FIG. 4 is a block diagram of a conventional satellite communication transceiver,
FIG. 5 is a diagram showing an example of frequency characteristics of a diplexer used in a conventional satellite communication transceiver. 14 …… antenna, 15 …… diplexer, 17 …… low noise amplifier.
Claims (1)
受信を行う共通のアンテナと、 衛星通信用送信周波帯域に通過帯域を有し、衛星通信用
受信周波数帯域と衛星航法用受信周波数帯域をカバーす
る通過帯域を有するダイプレクサと、 ダイプレクサから出力された受信信号を増幅する低雑音
増幅器と、 この低雑音増幅器の出力信号を二分割し、一方を通信制
御信号処理部へ供給し、他方を衛星航法受信機に供給す
る分割器と、 該分割器と衛星航法受信機の間に挿入されるレベル補正
用増幅器と、 を設けたことを特徴とする衛星航法用及び衛星通信用地
球局の送受信装置。1. A common antenna for receiving from a navigation satellite and transmitting / receiving to / from a communication satellite, having a pass band in a transmission frequency band for satellite communication, and covering a reception frequency band for satellite communication and a reception frequency band for satellite navigation. A diplexer having a pass band that outputs a low noise amplifier that amplifies the received signal output from the diplexer, and divides the output signal of this low noise amplifier into two parts, one of which is supplied to the communication control signal processing unit and the other of which is satellite navigation. A transmitter / receiver for a satellite navigation and satellite communication earth station, comprising: a divider supplied to a receiver; and a level correction amplifier inserted between the divider and the satellite navigation receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62189462A JPH0820503B2 (en) | 1987-07-29 | 1987-07-29 | Earth station transmitter / receiver for satellite navigation and satellite communications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62189462A JPH0820503B2 (en) | 1987-07-29 | 1987-07-29 | Earth station transmitter / receiver for satellite navigation and satellite communications |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6432185A JPS6432185A (en) | 1989-02-02 |
| JPH0820503B2 true JPH0820503B2 (en) | 1996-03-04 |
Family
ID=16241672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62189462A Expired - Fee Related JPH0820503B2 (en) | 1987-07-29 | 1987-07-29 | Earth station transmitter / receiver for satellite navigation and satellite communications |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0820503B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6865376B2 (en) * | 2001-07-03 | 2005-03-08 | Kyocera Wireless Corp. | System and method for a GPS enabled antenna |
| CN111509404B (en) * | 2020-04-07 | 2021-08-17 | 成都锦江电子系统工程有限公司 | Multifunctional phased array antenna for satellite broadcast data reception and wind profile measurement |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5296813A (en) * | 1976-02-09 | 1977-08-15 | Nippon Telegr & Teleph Corp <Ntt> | Transbonder for loading satelite |
-
1987
- 1987-07-29 JP JP62189462A patent/JPH0820503B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5296813A (en) * | 1976-02-09 | 1977-08-15 | Nippon Telegr & Teleph Corp <Ntt> | Transbonder for loading satelite |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6432185A (en) | 1989-02-02 |
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| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |