JPH04170232A - Transmission power control system - Google Patents
Transmission power control systemInfo
- Publication number
- JPH04170232A JPH04170232A JP29743790A JP29743790A JPH04170232A JP H04170232 A JPH04170232 A JP H04170232A JP 29743790 A JP29743790 A JP 29743790A JP 29743790 A JP29743790 A JP 29743790A JP H04170232 A JPH04170232 A JP H04170232A
- Authority
- JP
- Japan
- Prior art keywords
- level
- reception
- temperature
- frequency converter
- beacon 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 8
- 239000000284 extract Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Radio Relay Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は衛星通信地球局の送信電力制御方式に関し、特
に屋外に設置される低雑音受信周波数変換器の温度特性
による誤差補正を行う送信電力制御方式に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a transmission power control method for a satellite communications earth station, and in particular to a transmission power control method for correcting errors due to temperature characteristics of a low-noise receiving frequency converter installed outdoors. Regarding control method.
従来、この種の送信電力制御方式では、衛星がらのビー
コン信号の受信レベルの検出を行ない、その受信レベル
が低下すると降雨による減衰量があると判断する。そし
て、受信周波数（例えば１２ＧＨｚ帯）と送信周波数（
例えば１４ＧＨｚ帯）の一定の変換係数により、送信側
の降雨減衰量を算出し、その降雨減衰量を制御するレベ
ル制御器により、降雨時における送信電力を増加し、衛
星の受信アンテナ点ではいつも一定のレベルになるよう
に制御していた。Conventionally, in this type of transmission power control system, the reception level of a beacon signal from a satellite is detected, and when the reception level decreases, it is determined that there is attenuation due to rain. Then, the receiving frequency (for example, 12 GHz band) and the transmitting frequency (
For example, the amount of rain attenuation on the transmitting side is calculated using a fixed conversion coefficient (for example, in the 14 GHz band), and a level controller that controls the amount of rain attenuation increases the transmission power during rain, so that it is always constant at the receiving antenna point of the satellite. was controlled to the level of
次に、第２図に示す従来例の構成図を参照して説明する
。衛星通信地球局では衛星１よりビーコン信号２をアン
テナ装置３で受信し、連動している導波管スイッチ゛等
を用いる切替スイッチ４と同軸スイッチ等を用いる切替
スイッチ６により、低雑音増幅器が入力側に設けられて
いる受信周波数変換器５の現用（５ａ）もしくは予備（
５ｂ）ルートのうち、通常現用（５ａ）ルートを選択し
ている。受信周波数変換器５はビーコン信号２を１２Ｇ
Ｈｚ帯から１’ＧＨｚ帯の信号に増幅・変換を行なう。Next, a description will be given with reference to a configuration diagram of a conventional example shown in FIG. At the satellite communication earth station, a beacon signal 2 is received from the satellite 1 by an antenna device 3, and a low-noise amplifier is connected to the input side by a changeover switch 4 using a waveguide switch etc. and a changeover switch 6 using a coaxial switch etc. Whether the reception frequency converter 5 installed in the current (5a) or standby (
Among the routes 5b), the normally used (5a) route is selected. The reception frequency converter 5 converts the beacon signal 2 into 12G.
Amplify and convert signals from the Hz band to the 1'GHz band.
ＩＧＨｚに変換されたビーコン信号は、分配器１２によ
り通信用の受信回路と分けられ狭帯域のビーコン受信機
１４て検波され、ビーコン信号の受信レベルを示すＡＧ
Ｃ電圧が取り出される。送信電力制御器１５は、このＡ
ＧＣ電圧から受信レベルの変動を抽出し、レベル制御器
１６に送信レベル制御信号を送り、この制御によって送
信通信系のレベルが制御される。そして通信信号は、送
信周波数変換器１７によって送信周波数に変換され、大
電力増幅器１８によって増幅され、降雨減衰量が補正さ
れた信号としてアンテナ装置３から衛星１に送出される
。The beacon signal converted to IGHz is separated from the communication receiving circuit by a distributor 12, detected by a narrowband beacon receiver 14, and then detected by an AG indicating the reception level of the beacon signal.
C voltage is taken out. The transmission power controller 15
Fluctuations in the reception level are extracted from the GC voltage and a transmission level control signal is sent to the level controller 16, which controls the level of the transmission communication system. The communication signal is then converted to a transmission frequency by the transmission frequency converter 17, amplified by the large power amplifier 18, and sent from the antenna device 3 to the satellite 1 as a signal corrected for rainfall attenuation.
次に第３図に示す受信周波数変換器５ａ及び５ｂの温度
対利得偏差図について説明する。カーブＡが現用（５ａ
）のもの、カーブＢが予る］１１（５ｂ）のものの温度
特性とする。ここで交点アの温度をＴ。℃とし、その時
の利害偏差をＯｄＢとし、この点を基準点とする。図か
ら明らかなように、温度Ｔ。以外５例えばＴｒ （’
Ｃ）では、受信周波数変換器５ｂにはｘ （ｄＢ）の利
得偏差が生じる。Next, the temperature vs. gain deviation diagram of the receiving frequency converters 5a and 5b shown in FIG. 3 will be explained. Curve A is currently in use (5a
), curve B is predetermined] 11 (5b). Here, the temperature at intersection A is T. ℃, the interest deviation at that time is OdB, and this point is taken as the reference point. As is clear from the figure, the temperature T. For example, Tr ('
In C), a gain deviation of x (dB) occurs in the reception frequency converter 5b.
上述した従来の送信電力制御方式は、降雨によるビーコ
ン信号のレベル変動がないにもかかわらず、屋外等の温
度変化のある環境下に受信周波数変換器が設置される場
合には、温度変動に起因する受信周波数変換器の利得変
動により、検出される受信レベルが変動してしまう方式
となっており、誤ってレベル制御を行ない送信出力を変
動させてしまうという欠点があった。Although the conventional transmission power control method described above does not change the level of the beacon signal due to rain, if the receiving frequency converter is installed in an environment with temperature changes such as outdoors, it may be affected by temperature fluctuations. This method has the drawback that the detected reception level fluctuates due to the gain fluctuation of the reception frequency converter, which causes the level control to be performed erroneously, causing the transmission output to fluctuate.
本発明の送信電力制御方式は、衛星からの低雑音の受信
周波数変換器を介してビーコン信号を含む受信信号を受
信し、ビーコン受信機が検出した前記ビーコン信号の受
信レベルを示す受信レベル情報により送信電力を制御す
る＃ｊＮｊ星通信地球局の送信電力制御方式において、
前記受信周波数変換器とほぼ同一の場所に設置されそこ
の温度情報を出力する温度センサと、前記受信周波数変
換器の温度変動による利得変動のデータを予め記憶し前
記温度情報から前記受信周波数変換器の温度変動による
受信レベル変動に対応したレベル補正量を算出して出力
するコントローラと、前記ビーコン受信機へ入力される
前記ビーコン信号の受信レベルを前記レベル補正量の入
力により補正するレベル補正器とを含んでいる。The transmission power control method of the present invention receives a reception signal including a beacon signal from a satellite through a low-noise reception frequency converter, and uses reception level information indicating the reception level of the beacon signal detected by a beacon receiver. In the transmission power control method of the #jNj star communication earth station that controls the transmission power,
a temperature sensor that is installed at almost the same location as the receiving frequency converter and outputs temperature information there; and a temperature sensor that stores in advance data on gain fluctuations due to temperature fluctuations of the receiving frequency converter and converts the temperature information into the receiving frequency converter. a controller that calculates and outputs a level correction amount corresponding to a reception level fluctuation due to temperature fluctuation; and a level corrector that corrects the reception level of the beacon signal input to the beacon receiver by inputting the level correction amount. Contains.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示す＋１１１１成図である
。本実施例は、第２図に示された従来例に加え、受信周
波変換器５ａ、５ｂとほぼ同一場所に設置された温度セ
ンサ７と、予め受信周波数変換器５ａ、５ｂそれぞれの
温度変動による利得偏差のデータを記憶するコントロー
ラ１０と、分配器１２とビーコン受信機１５の間に接続
されコントローラ１０により受信ビーコン信号のレベル
補正を行なうレベル補正器１３とを含んでいる。FIG. 1 is a +1111 diagram showing one embodiment of the present invention. In addition to the prior art example shown in FIG. It includes a controller 10 that stores gain deviation data, and a level corrector 13 that is connected between a distributor 12 and a beacon receiver 15 and that allows the controller 10 to correct the level of a received beacon signal.
次に、本実施例の動作について説明する。コントローラ
１０は、温度センサ７により得られた温度情報８と、連
動している切替スイッチ４及び５により得られたスイッ
チ情報９により、現用または予備の受信周波数変換器５
ａ＋５ｂ の温度変動により利得偏差のデータをもと
にビーコン信号のレベル補正量１１を決定する。このレ
ベル補正量１１によりレベル補正器１３はＩＧＨｚに変
換されたビーコン信号のレベル補正を行なう。レベル補
正されたビーコン信号はビーコン受信機１４で検波され
、ビーコン信号の受信レベルを示すＡＧＣ電圧が取り出
される。送信電力制御器１５は、受信レベルの変動を抽
出し、レベル制御器１６にその変動に対応した送信レベ
ル制御信号を送り、送信通信系のレベルが制御される。Next, the operation of this embodiment will be explained. The controller 10 uses temperature information 8 obtained from the temperature sensor 7 and switch information 9 obtained from the interlocked changeover switches 4 and 5 to select the current or standby receiving frequency converter 5.
The level correction amount 11 of the beacon signal is determined based on the gain deviation data due to the temperature fluctuation of a+5b. The level corrector 13 uses this level correction amount 11 to correct the level of the beacon signal converted to IGHz. The level-corrected beacon signal is detected by the beacon receiver 14, and an AGC voltage indicating the reception level of the beacon signal is extracted. The transmission power controller 15 extracts fluctuations in the reception level and sends a transmission level control signal corresponding to the fluctuations to the level controller 16, thereby controlling the level of the transmission communication system.
以上説明したように本発明においては、降雨減衰量のみ
ならず、受信周波数変換器の温度変化によるレベル変動
も含んで衛星の受信アンテナ点でのレベルを一定とする
ことができる。As explained above, in the present invention, the level at the receiving antenna point of the satellite can be made constant, including not only the amount of rain attenuation but also the level fluctuation due to temperature change of the receiving frequency converter.
以上説明したように本発明は、低雑音の受信周波数変換
器の温度変動による利得変動を補正する為の温度センサ
とコントローラと受信ビーコン信号のレベル補正器を備
える事により、受信周波数変換器の温度変動に起因する
衛星通信地球局の送信出力変動を防止する事が出来る効
果がある。As explained above, the present invention has a temperature sensor, a controller, and a receiving beacon signal level corrector for correcting gain fluctuations due to temperature fluctuations of a low-noise receiving frequency converter. This has the effect of preventing fluctuations in the transmission output of the satellite communication earth station due to fluctuations.
第１図は本発明の一実施例のｔ７．ｙ成因、第２図は従
来例の構成図、第３図は受信周波数変換器の温度対利得
偏差図である。
■・・・衛星、２・・・ビーコン信号、３・・・アンテ
ナ装置、４・・・切替スイッチ、５ ａ ＋ ５１）・
・・受信周波数変換器、６・・・切替スイッチ、７・・
・温度センサ、８・・・温度情報、９・・・スイッチ情
報、１０・・・フントーラ、１１・・・レベル補正量、
１２・・・分配器、１３・・・レベル補正器、１４・・
・ビーコン受信機、１５・・・送信電力制御器、１６・
・・レベル制御器、１７・・・送信周波数変換器、１８
・・・大電力増幅器。FIG. 1 shows t7 of one embodiment of the present invention. FIG. 2 is a block diagram of a conventional example, and FIG. 3 is a temperature versus gain deviation diagram of a receiving frequency converter. ■... Satellite, 2... Beacon signal, 3... Antenna device, 4... Changeover switch, 5 a + 51)
...Reception frequency converter, 6...Selector switch, 7...
・Temperature sensor, 8...Temperature information, 9...Switch information, 10...Funtora, 11...Level correction amount,
12...Distributor, 13...Level corrector, 14...
- Beacon receiver, 15... Transmission power controller, 16.
... Level controller, 17 ... Transmission frequency converter, 18
...High power amplifier.
Claims (1)
コン信号を含む受信信号を受信し、ビーコン受信機が検
出した前記ビーコン信号の受信レベルを示す受信レベル
情報により送信電力を制御する衛星通信地球局の送信電
力制御方式において、前記受信周波数変換器とほぼ同一
の場所に設置されそこの温度情報を出力する温度センサ
と、前記受信周波数変換器の温度変動による利得変動の
データを予め記憶し前記温度情報から前記受信周波数変
換器の温度変動による受信レベル変動に対応したレベル
補正量を算出して出力するコントローラと、前記ビーコ
ン受信機へ入力される前記ビーコン信号の受信レベルを
前記レベル補正量の入力により補正するレベル補正器と
を含むことを特徴とする送信電力制御方式。２、前記受
信周波数変換器は切替予備系を構成し、前記コントロー
ラは前記受信周波数変換器の切替情報と前記温度情報と
から前記レベル補正量を算出して出力することを特徴と
する請求項１記載の送信電力制御方式。1. Satellite communication that receives a reception signal including a beacon signal from a satellite via a low-noise reception frequency converter, and controls transmission power based on reception level information indicating the reception level of the beacon signal detected by a beacon receiver. In a transmission power control system for an earth station, a temperature sensor is installed at approximately the same location as the receiving frequency converter and outputs temperature information there, and data on gain fluctuations due to temperature fluctuations of the receiving frequency converter is stored in advance. a controller that calculates and outputs a level correction amount corresponding to reception level fluctuations due to temperature fluctuations of the reception frequency converter from the temperature information; A transmission power control system comprising: a level corrector that corrects based on an input of the level corrector. 2. Claim 1, wherein the receiving frequency converter constitutes a switching standby system, and the controller calculates and outputs the level correction amount from switching information of the receiving frequency converter and the temperature information. Transmission power control method described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29743790A JPH04170232A (en) | 1990-11-02 | 1990-11-02 | Transmission power control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29743790A JPH04170232A (en) | 1990-11-02 | 1990-11-02 | Transmission power control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04170232A true JPH04170232A (en) | 1992-06-17 |
Family
ID=17846514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29743790A Pending JPH04170232A (en) | 1990-11-02 | 1990-11-02 | Transmission power control system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04170232A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5867769A (en) * | 1995-08-02 | 1999-02-02 | Fujitsu Limited | Transmission power control apparatus in earth station for satellite communication |
| GB2378328A (en) * | 2001-08-01 | 2003-02-05 | Ipwireless Inc | AGC scheme using characteristics of a received beacon signal particularly in a TDD-CDMA system |
| JP2015173356A (en) * | 2014-03-11 | 2015-10-01 | 株式会社東芝 | Satellite communication device and transmission power control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57132437A (en) * | 1981-02-10 | 1982-08-16 | Mitsubishi Electric Corp | Transmitting power control system |
| JPS63132536A (en) * | 1986-11-24 | 1988-06-04 | Mitsubishi Electric Corp | Satellite communication earth station device |
| JPS6442931A (en) * | 1987-08-10 | 1989-02-15 | Fujitsu Ltd | Transmission power control system for satellite communication earth station |
-
1990
- 1990-11-02 JP JP29743790A patent/JPH04170232A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57132437A (en) * | 1981-02-10 | 1982-08-16 | Mitsubishi Electric Corp | Transmitting power control system |
| JPS63132536A (en) * | 1986-11-24 | 1988-06-04 | Mitsubishi Electric Corp | Satellite communication earth station device |
| JPS6442931A (en) * | 1987-08-10 | 1989-02-15 | Fujitsu Ltd | Transmission power control system for satellite communication earth station |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5867769A (en) * | 1995-08-02 | 1999-02-02 | Fujitsu Limited | Transmission power control apparatus in earth station for satellite communication |
| GB2378328A (en) * | 2001-08-01 | 2003-02-05 | Ipwireless Inc | AGC scheme using characteristics of a received beacon signal particularly in a TDD-CDMA system |
| GB2378328B (en) * | 2001-08-01 | 2005-07-13 | Ipwireless Inc | AGC scheme and receiver for use in a wireless communication system |
| US7415083B2 (en) | 2001-08-01 | 2008-08-19 | Ipwireless, Inc. | AGC scheme and receiver for use in a wireless communication system |
| JP2015173356A (en) * | 2014-03-11 | 2015-10-01 | 株式会社東芝 | Satellite communication device and transmission power control method |
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