JPS6058729A - Transmitter for satellite communication - Google Patents
Transmitter for satellite communicationInfo
- Publication number
- JPS6058729A JPS6058729A JP16656583A JP16656583A JPS6058729A JP S6058729 A JPS6058729 A JP S6058729A JP 16656583 A JP16656583 A JP 16656583A JP 16656583 A JP16656583 A JP 16656583A JP S6058729 A JPS6058729 A JP S6058729A
- Authority
- JP
- Japan
- Prior art keywords
- distortion
- amplifier
- linearizer
- control signal
- intermediate frequency
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/005—Control of transmission; Equalising
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、衛星通信地上局装置に設けられる衛星通信用
送信装置に関し、特に、送信電力制御手段を備えた衛星
通信用送信装置におけるリニアライザの制御に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a satellite communication transmitter provided in a satellite communication ground station device, and more particularly to control of a linearizer in a satellite communication transmitter equipped with a transmission power control means.
衛星通信、特に準ミリ波帯等の高い周波数を用いる衛星
通信においては、降雨による減衰が大きく、降雨による
減衰に対する適当な対策が必要である。このため、アッ
プリンクの降雨減衰に応じて地球局からの送信電力を制
御する方法が考えられ、これを一般に地球局の送信電力
制御と呼んでいる。Satellite communications, especially satellite communications that use high frequencies such as the sub-millimeter wave band, are subject to large attenuation due to rain, and appropriate countermeasures against attenuation due to rain are required. For this reason, a method of controlling the transmission power from the earth station according to the rain attenuation of the uplink has been considered, and this is generally called earth station transmission power control.
一方、衛星通信用送信装置における送信電力増幅器であ
る高出力増幅器で発生する混変調歪（ｉｎｔａｒｍｏｄ
ｕｌａｔｉｏｎ ｄｉｓｔｏｒｔｉｏｎ）を改善するた
めに。On the other hand, intermodulation distortion (intermod distortion) occurs in a high-power amplifier, which is a transmission power amplifier, in a satellite communication transmitter.
ulation distortion).
ブリデ（スト−ジョン型リニアライザがよく用いられて
いる。しかし、送信電力制御を行っている場合、送信電
力制御範囲のどのレベルでリニアライザによる混変調歪
の改善を最良にすればよいか問題があった。これを第１
図を用いて説明する。Bride (storage type) linearizers are often used. However, when transmitting power control is being performed, there is a problem as to which level in the transmitting power control range should best improve cross-modulation distortion using the linearizer. This is the first
This will be explained using figures.
第１図において、横軸は高出力増幅器の出力電力レベル
（Ｐｏｕｔ”縦軸は混変調歪を示し、ｌは高出力増幅器
の混変調歪特性、２は高出力増幅器の出力レベルｐ、１
で高出力増幅器の混変調歪が最良となるようにリニアラ
イザを調整した場合の混変調歪特性である。同様に、３
は出力レベルＰ２で混変調歪が最良となるように調整し
た混変調歪特性である。そして、４は出力レベルＰ３で
混変調歪が最良になるように調整した混変調歪特性であ
る。この特性４では、出力レベルが低下すると混変調歪
特性が劣化しているが、これはリニアライブで発生する
歪と高出力増幅器で発生する混変調歪とがレベルを変え
た時に同じに変化しないためである。このように、送信
電力増幅器としての高出力増幅器の出力レベルが送信電
力制御によシＰ１からＰ３まで変わる場合、リニアライ
ザの調整を混変調歪特性２〜４のいずれかに調整しても
。In Figure 1, the horizontal axis shows the output power level (Pout) of the high-output amplifier, the vertical axis shows the intermodulation distortion, l is the intermodulation distortion characteristic of the high-output amplifier, 2 is the output level p of the high-output amplifier, 1
This is the cross-modulation distortion characteristic when the linearizer is adjusted so that the cross-modulation distortion of the high-output amplifier is optimized. Similarly, 3
is the cross-modulation distortion characteristic adjusted so that the cross-modulation distortion becomes the best at output level P2. 4 is the cross-modulation distortion characteristic adjusted so that the cross-modulation distortion becomes the best at the output level P3. In this characteristic 4, the cross-modulation distortion characteristic deteriorates as the output level decreases, but this is because the distortion generated in linear live and the cross-modulation distortion generated in high-output amplifiers do not change in the same way when the level is changed. It's for a reason. In this way, when the output level of the high output amplifier as a transmission power amplifier changes from P1 to P3 due to transmission power control, even if the linearizer is adjusted to any of the intermodulation distortion characteristics 2 to 4.
Ｐ１〜Ｐ３の範囲すべてにわたる最良の混変調歪とはな
υ得ず、リニアライザの性能を十分に活かすことができ
なかった。The best cross-modulation distortion over the entire range of P1 to P3 could not be obtained, and the performance of the linearizer could not be fully utilized.
本発明の目的は、送信電力制御を行っている衛星通信用
送信装置において、リニアライザの歪発生量を送信出力
レベルにより制御するようにし。An object of the present invention is to control the amount of distortion generated in a linearizer by the transmission output level in a satellite communication transmitter that performs transmission power control.
送信電力制御範囲のいずれの送信出力レベルであろうと
も、リニアライザにより送信電力増幅器の混変調歪を最
良にすることである。Regardless of the transmission output level within the transmission power control range, the objective is to optimize the intermodulation distortion of the transmission power amplifier using the linearizer.
本発明によれば、中間周波信号を受ける。制御信号に応
じて利得が可変となっている中間周波増幅器と、該中間
周波増幅器の出力信号を受けるリニアライザと、該リニ
アライザの出力信号を受け。According to the invention, an intermediate frequency signal is received. an intermediate frequency amplifier whose gain is variable according to a control signal; a linearizer that receives an output signal of the intermediate frequency amplifier; and a linearizer that receives an output signal of the linearizer.
送信周波数に周波数変換するアップコンバータと。and an upconverter to convert the frequency to the transmit frequency.
該アップコンバータの出力信号を所定の電力レベルまで
増幅しアンテナに与える送信電力増幅器とを有し、前記
リニアライザは、前記送信電力増幅器にて生じる混変調
歪を補償する歪を、制御信号に応じて発生させることが
できるものであり、気象現象変化による送信信号減衰量
（例えば降雨減衰量）に対応した制御信号によって、前
記中間周波増幅器の利得を制御すると同時に、前記リニ
アライザで発生する歪の量及び位相をも制御するように
したことを特徴とする衛星通信用送信装置が得られる。and a transmission power amplifier that amplifies the output signal of the up-converter to a predetermined power level and supplies it to the antenna, and the linearizer amplifies the output signal of the up-converter to a predetermined power level and supplies it to the antenna, and the linearizer generates distortion that compensates for cross-modulation distortion generated in the transmission power amplifier in accordance with a control signal. At the same time, the gain of the intermediate frequency amplifier is controlled by a control signal corresponding to the amount of transmission signal attenuation due to changes in weather phenomena (for example, the amount of attenuation caused by rain), and the amount of distortion generated in the linearizer is controlled. A transmitter for satellite communication is obtained, which is characterized in that it also controls the phase.
次に図面を参照して本発明の詳細な説明する。Next, the present invention will be described in detail with reference to the drawings.
第２図は本発明の実施例の構成図で、参照数字１１は信
号入力端子、１２は中間周波増幅器。FIG. 2 is a block diagram of an embodiment of the present invention, in which reference numeral 11 is a signal input terminal, and 12 is an intermediate frequency amplifier.
１３はリニアライプ、１４はアッゾコンノぐ一タ。13 is Linear Live, 14 is Azo Konno Guitta.
１５は送信電力増幅器である高出力増幅器、１６はアン
テナ、１７は送信電力制御信号入力端子。15 is a high output amplifier which is a transmission power amplifier; 16 is an antenna; and 17 is a transmission power control signal input terminal.
１８は送信電力制御器、１９はリニアライザ制御器であ
る。信号入力端子１１に印加された中間周波信号は、送
信電力制御器１８を介して与えられる制御信号によシ利
得が制御される中間周波増幅器１２で増幅され、リニア
ライザ１３に与えられる。リニアライザ１３では、リニ
アライザ制御器１９を介して与えられる制御信号により
歪の量と位相が制御され、高出力増幅器１５の混変調歪
を改善するための歪が発生される。このリニアライザ１
３の出力信号は、アップコンバータ１４で周（５）
波数変換され、高出力増幅器１５にて必要レベルまで増
幅され、アンテナ１６より衛星へ送出される〇
一方、送信電力制御信号入力端子１７には、衛星から送
られるピーコン波の搬送波対雑音電力比（Ｃ／Ｎ） を
測定する等して、アップリンクの降雨減衰量をめ、送信
出力を増減させる制御信号が入力される。送信電力制御
信号入力端子１７からの制御信号により、送信電力制御
器１８を介し中間周波増幅器１２の利得を変えると同時
に、同じ制御信号によシ、リニアライザ１３で発生する
歪の量と位相をリニアライザ制御器１９を介して変え。18 is a transmission power controller, and 19 is a linearizer controller. The intermediate frequency signal applied to the signal input terminal 11 is amplified by an intermediate frequency amplifier 12 whose gain is controlled by a control signal applied via a transmission power controller 18, and is applied to a linearizer 13. In the linearizer 13, the amount and phase of distortion are controlled by a control signal applied via the linearizer controller 19, and distortion is generated to improve the cross-modulation distortion of the high-output amplifier 15. This linearizer 1
The output signal of No. 3 is frequency-converted by the up converter 14 (5), amplified to the required level by the high-output amplifier 15, and sent to the satellite from the antenna 16. On the other hand, the output signal is sent to the transmission power control signal input terminal 17. A control signal is input to increase or decrease the transmission output based on the amount of uplink rain attenuation by measuring the carrier-to-noise power ratio (C/N) of the peakon wave sent from the satellite. A control signal from the transmission power control signal input terminal 17 changes the gain of the intermediate frequency amplifier 12 via the transmission power controller 18, and at the same time, the same control signal changes the amount and phase of distortion generated in the linearizer 13. via the controller 19.
高出力増幅器１５の出力レベルに応じて、混変調歪特性
が最良となるようリニアライザ３を制御している。The linearizer 3 is controlled according to the output level of the high-output amplifier 15 so that the intermodulation distortion characteristics are optimized.
以上のように本発明によれば、送信出力制御を行ってい
る衛星通信用送信装置において、送信電力制御信号によ
りリニアライザで発生する歪の量と位相を制御すること
により、送信出力が制御信号により変化しても、常にリ
ニアライザから最良（６）
の混変調歪特性が得られるという効果がある。As described above, according to the present invention, in a satellite communication transmitter that performs transmission output control, by controlling the amount and phase of distortion generated in a linearizer using a transmission power control signal, the transmission output can be adjusted according to the control signal. Even if the linearizer changes, the effect is that the best (6) cross-modulation distortion characteristics can always be obtained from the linearizer.
第１図は、高出力増幅器の出力レベルに対する混変調歪
特性を示した図、第２図は本発明の一実施例に係る衛星
通信用送信装置のブロック図である。
１１・・・信号入力端子、１２・・・中間周波増幅器。
１３・・・リニアライザ、１４・・・アップコンバータ
。
１５・・・送信電力増幅器（高出力増幅器）、１６・・
・アンテナ、１７・・・送信電力制御信号入力端子。
１８・・・送信電力制御器、１９・・・リニアライザ制
御器。
（７）
Ｐ Ｒ／’３ Ｐｏｕｒ （ｄＢ）
第１図
第２図FIG. 1 is a diagram showing intermodulation distortion characteristics with respect to the output level of a high-output amplifier, and FIG. 2 is a block diagram of a transmitter for satellite communication according to an embodiment of the present invention. 11...Signal input terminal, 12...Intermediate frequency amplifier. 13... Linearizer, 14... Up converter. 15... Transmission power amplifier (high output amplifier), 16...
- Antenna, 17... Transmission power control signal input terminal. 18... Transmission power controller, 19... Linearizer controller. (7) P R/'3 Pour (dB) Figure 1 Figure 2
Claims (1)
変となっている中間周波増幅器と、該中間周波増幅器の
出力信号を受けるリニアライザと。 該リニアライザの出力信号を受け、送信周波数に周波数
変換するアップコンバータと、該アップコンバータの出
力信号を所定の電力レベルまで増幅しアンテナに与える
送信電力増幅器とを有し、前記リニアライザは、前記送
信電力増幅器にて生じる混変調歪を補償する歪を、制御
信号に応じて発生させることができるものであり、気象
現象変化による送信信号減衰量に対応した制御信号によ
って、前記中間周波増幅器の利得を制御すると同時に、
前記リニアライザで発生する歪の量及び位相をも制御す
るようにしたことを特徴とする衛星通信用送信装置。[Claims] 1. Receive an intermediate frequency signal. An intermediate frequency amplifier whose gain is variable according to a control signal, and a linearizer that receives an output signal of the intermediate frequency amplifier. The linearizer includes an upconverter that receives the output signal of the linearizer and converts the frequency to a transmission frequency, and a transmission power amplifier that amplifies the output signal of the upconverter to a predetermined power level and supplies it to the antenna. Distortion that compensates for cross-modulation distortion occurring in the amplifier can be generated in response to a control signal, and the gain of the intermediate frequency amplifier is controlled by the control signal that corresponds to the amount of transmission signal attenuation due to changes in weather phenomena. At the same time,
A transmitting device for satellite communication, characterized in that the amount and phase of distortion generated in the linearizer are also controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16656583A JPS6058729A (en) | 1983-09-12 | 1983-09-12 | Transmitter for satellite communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16656583A JPS6058729A (en) | 1983-09-12 | 1983-09-12 | Transmitter for satellite communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6058729A true JPS6058729A (en) | 1985-04-04 |
Family
ID=15833618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16656583A Pending JPS6058729A (en) | 1983-09-12 | 1983-09-12 | Transmitter for satellite communication |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6058729A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04248708A (en) * | 1991-02-05 | 1992-09-04 | Fukushima Nippon Denki Kk | Amplifier with output variable linearizer |
| JP2881187B2 (en) * | 1990-10-31 | 1999-04-12 | ノーザン・テレコム・リミテッド | Radio frequency power amplifier clipping control method and transmitter for radio frequency communication system |
-
1983
- 1983-09-12 JP JP16656583A patent/JPS6058729A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2881187B2 (en) * | 1990-10-31 | 1999-04-12 | ノーザン・テレコム・リミテッド | Radio frequency power amplifier clipping control method and transmitter for radio frequency communication system |
| JPH04248708A (en) * | 1991-02-05 | 1992-09-04 | Fukushima Nippon Denki Kk | Amplifier with output variable linearizer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5748678A (en) | Radio communications apparatus | |
| JP4855267B2 (en) | Signal extraction circuit and distortion compensation amplifier having the same | |
| JPH02246523A (en) | Transmission power controller for radio equipment | |
| US5781069A (en) | Pre-post distortion amplifier | |
| US7502599B2 (en) | Cartesian loop transmitter and method of adjusting an output level of such transmitter | |
| US6791410B2 (en) | Feedforward amplifier and method of improving the performance thereof | |
| US6675000B1 (en) | Radio communication apparatus and transmission power control method therein | |
| KR20160048120A (en) | Amplifying stage working point determination | |
| JP4071031B2 (en) | Method and apparatus for reducing distortion in a transmitter | |
| US5694431A (en) | Method and apparatus for average power control | |
| TW423232B (en) | Method for adaptively controlling amplifier linearization devices | |
| US8031803B2 (en) | Transmitter capable of suppressing peak of transmission signal | |
| JPS6058729A (en) | Transmitter for satellite communication | |
| US6904268B2 (en) | Low noise linear transmitter using cartesian feedback | |
| US6959174B2 (en) | Amplifying device | |
| JP3154462B2 (en) | Mobile communication system and mobile station device | |
| KR101079255B1 (en) | Apparatus for controlling carrier gain for satellite communication system and method thereof | |
| EP1502352A2 (en) | Radio apparatus comprising an amplifier for radio-frequency signals, amplifier for radio-frequency signals and method for amplifying such signals | |
| KR100583424B1 (en) | Digital linearization apparatus of power amplifier in optical repeater | |
| JPS637062B2 (en) | ||
| KR20050093086A (en) | Interference cancellation repeater using vector modulator | |
| JPS62189825A (en) | Satellite data relay system | |
| JPH10163945A (en) | Up-link power control method for satellite broadcast transmission station | |
| KR20010104063A (en) | Device for controlling transmission power in mobile communication phone | |
| JPH05343929A (en) | Power amplifier |