JPS6041328A - Transmitter of radio communication - Google Patents

Transmitter of radio communication

Info

Publication number
JPS6041328A
JPS6041328A JP14942883A JP14942883A JPS6041328A JP S6041328 A JPS6041328 A JP S6041328A JP 14942883 A JP14942883 A JP 14942883A JP 14942883 A JP14942883 A JP 14942883A JP S6041328 A JPS6041328 A JP S6041328A
Authority
JP
Japan
Prior art keywords
output
transmission
amplifier
transmission power
controller
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
Application number
JP14942883A
Other languages
Japanese (ja)
Inventor
Takeshi Hayasaka
早坂　赳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14942883A priority Critical patent/JPS6041328A/en
Publication of JPS6041328A publication Critical patent/JPS6041328A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/3036—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers
    • H03G3/3042—Automatic control in amplifiers having semiconductor devices in high-frequency amplifiers or in frequency-changers in modulators, frequency-changers, transmitters or power amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B1/0475—Circuits with means for limiting noise, interference or distortion

Abstract

PURPOSE:To prevent the generation of cross modulation noise of a high-output amplifier to make transmission up to saturation output possible by stopping the transmission of a part of plural waves to transmit less transmission signal waves when a transmission power is increased by a transmission power control means. CONSTITUTION:Individual intermediate frequency signals in a single channel per carrier SCPC system of the radio communication transmitter are inputted to switches 11-1n, and outputs of switches 11-1n are applied to a combiner 2. The output of the combiner 2 is inputted to an intermediate frequency amplifier 3, and the output is supplied to a high-output amplifier 5 through an up-converter 4. Signals from a line status signal input terminal 7 and a power control signal input terminal 9 are applied to a transmission line controller 8 of this transmitter, and switches 11-1n are controlled by the output of the controller 8. The signal of the terminal 9 is applied to a transmission power controller 10, and the amplifier 3 is controlled by the output of the controller 10. Thus, less transmission signal waves are transmitted from an antenna 6 to prevent the generation of the cross modulation noise of the amplifier 5.

Description

【発明の詳細な説明】 〔発明の属する技術分野〕 本発明は、送信電力制御手段を備えた無線通信送信装置
に関する。特に、衛星通信方式、見通し内通何方式、そ
の他無線通信方式に適する送信装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION [Technical Field to Which the Invention Pertains] The present invention relates to a wireless communication transmitter equipped with a transmission power control means. In particular, the present invention relates to a transmitter suitable for satellite communication systems, line-of-sight communication systems, and other wireless communication systems.

〔従来技術の説明〕[Description of prior art]

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。従来から、アッ
プリンクの降雨減衰に応じて地球局から送信電力を制御
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. Conventionally, a method has been considered in which the earth station controls the transmission power according to uplink rain attenuation, and this is generally called earth station transmission power control.

この制御は、雨が降りだすと降雨減衰が生じ、これに応
じて送信出力を増加させ降雨減衰を補償しようとするが
、さらに雨が激しく降りだすと送信出力はどんどん増加
し、衛星通信送信装置の高出力増幅器の出力レベルはそ
の飽和出力に近づいてしまう。シングル・チャンネル・
バー・キャリア（５ｃｐｃ　）方式のように、複数波を
送信している場合には、送信出力が飽和出力に近づくと
送信している複数波間で大きな混変調雑音が生じ信号対
雑音比（Ｓ／Ｎ　）が劣化する。　したがって、送信出
力制御を行う場合には、高出力増幅の出力レベルが大き
な混変調雑音が生じない範囲で行う必要があり、送信電
力制御には上限があった。このため、高出力増幅器の出
力レベルを送信電力制御範囲の上限以上にすることがで
きず、降雨減衰を補償するだめに必要とされる高出力増
幅器の出力レベルが上限を越えた場合に、全回線が通話
不能になってしまう欠点があった。In this control, when it starts to rain, rain attenuation occurs, and the transmission output is increased accordingly to compensate for the rain attenuation, but when it starts to rain even more heavily, the transmission output increases rapidly, and the satellite communication transmitter The output level of a high-power amplifier approaches its saturated output. Single channel
When transmitting multiple waves, such as in the bar carrier (5 cpc) method, when the transmitting output approaches the saturated output, large cross-modulation noise occurs between the multiple waves being transmitted, resulting in signal-to-noise ratio (S/ N) deteriorates. Therefore, when performing transmission power control, it is necessary to keep the output level of the high-power amplification within a range that does not cause large cross-modulation noise, and there is an upper limit to transmission power control. For this reason, the output level of the high-power amplifier cannot be raised above the upper limit of the transmission power control range, and when the output level of the high-power amplifier required to compensate for rain attenuation exceeds the upper limit, the There was a drawback that the line became unable to make calls.

〔発明の目的〕[Purpose of the invention]

本発明は、前記の欠点を除去し、送信電力制御を行って
いる無線通信装置の高出力増幅器の出力レベルを混変調
雑音を大きくせずに飽和出力まで出力することができる
無線通信装置装Ｗを提供することを目的とする。The present invention eliminates the above-mentioned drawbacks and provides a wireless communication device W capable of outputting the output level of a high-output amplifier of a wireless communication device that performs transmission power control to a saturated output without increasing cross-modulation noise. The purpose is to provide

〔発明の特徴〕[Features of the invention]

本発明は、送信電力制御手段を備え、周波数分割された
複数波を送出している無線通信送信装置において、前記
送信電力制御手段により送信出力を増加させたときに、
前記複数波の一部の送イ菩を停止して少ない送信信号波
を送出する手段を備えたことを特徴とする。The present invention provides a wireless communication transmitter that includes a transmission power control means and transmits a plurality of frequency-divided waves, when the transmission power is increased by the transmission power control means,
The present invention is characterized in that it includes means for stopping transmission of some of the plurality of waves and transmitting fewer transmission signal waves.

〔実施例による説明〕[Explanation based on examples]

本発明の実施例について図面を参照して説明する。図は
本発明一実施例無線通信送信装置のブロック構成図であ
る。図において、５ｃｐｃ方式の各中間周波信号が入力
されるスイッチ１１〜１ｎには、コンバイ”す２が接続
される。コンバイナ２の出力には、中間周波増幅器３が
接続される。中間周波増幅器３の出力には、アップコン
バータ４が接続される。アップコンバータ４の出力には
、高出力増幅器５を介してアンテナ６が接続される。回
線状態信号入力端子７には、送信回線制御装置８の回線
状態信号入力が接続される。送信電力制御信号入力端子
９には、送信回線制御装置８の制御信号入力と送信電力
制御器１０とが接続される。送信回線制御装置８の出力
は、スイッチ１１〜１ｎにそれぞれ接続される。送信電
力制御器１０の出力は、中間周波増幅器３に接続される
。Embodiments of the present invention will be described with reference to the drawings. The figure is a block diagram of a wireless communication transmitter according to an embodiment of the present invention. In the figure, a combiner 2 is connected to switches 11 to 1n into which intermediate frequency signals of the 5 cpc system are input. An intermediate frequency amplifier 3 is connected to the output of the combiner 2.Intermediate frequency amplifier 3 An up-converter 4 is connected to the output of the up-converter 4. An antenna 6 is connected to the output of the up-converter 4 via a high-output amplifier 5. A line status signal input terminal 7 is connected to the output of the transmission line control device 8. A line status signal input is connected to the transmission power control signal input terminal 9. A control signal input of the transmission line control device 8 and a transmission power controller 10 are connected to the transmission power control signal input terminal 9. 11 to 1n, respectively.The output of the transmission power controller 10 is connected to the intermediate frequency amplifier 3.

とのように構成された無線通信送信装置の動作について
図を用いて説明する。図において、５ａｐＣ方式の各中
間周波信号はスイッチ１．〜１ｎを介しコンバイナ２に
より合成され、合成された信号は、送信電力制御器１０
の制御信号により利得が制御される中間周波増幅器３に
て増幅され、さらにアップコンバータ４にて中間周波信
号から送信周波数に変換された後に、高出力増幅器５に
て増幅され、アンテナ６より衛星へ向けて送信される。The operation of the wireless communication transmitter configured as follows will be explained using the drawings. In the figure, each intermediate frequency signal of the 5apC system is connected to switch 1. ~1n and are combined by the combiner 2, and the combined signals are sent to the transmission power controller 10.
The signal is amplified by an intermediate frequency amplifier 3 whose gain is controlled by a control signal of sent to.

一方、送信電力制御信号入力端子９は、衛星から送られ
るビーコン波の搬送波対雑音電力比（Ｃ／Ｎ　）を測定
したり、雨量計により降雨量を測定するなどして、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
信号の入力端子であり、送信電力制御器１０を介して中
間周波増幅器３の利得を変え、降雨減衰量の分だけ送信
出力を増加させている。On the other hand, the transmission power control signal input terminal 9 is used to attenuate uplink rain by measuring the carrier-to-noise power ratio (C/N) of the beacon wave sent from the satellite or by measuring the amount of rainfall with a rain gauge. This is an input terminal for a control signal that increases or decreases the transmission output based on the amount of rain, and changes the gain of the intermediate frequency amplifier 3 via the transmission power controller 10 to increase the transmission output by the amount of rain attenuation.

ここで、本発明の特徴とするところは、送信回線制御回
路８が、送信電力制御信号入力端子９からアップリンク
の降雨減衰量の情報と、回線状態信号入力端子７から使
用している回線の情報を得て、スイッチ１．〜１ｎを制
御するところにある。Here, the feature of the present invention is that the transmission line control circuit 8 receives information on the amount of rain attenuation of the uplink from the transmission power control signal input terminal 9 and the information on the line being used from the line status signal input terminal 7. Get the information and switch 1. ~1n is controlled.

すなわち、Ｎチャンネルの５ｃｐｃ信号を送信できる衛
星通信装置で、高出力増幅器５の出力がチャンネルあた
！’　”ｍａｘの出力電力で、搬送波対混変調雑音比（
０／Ｉ　）が規格のＣ／工。であったとする。In other words, in a satellite communication device that can transmit N-channel 5cpc signals, the output of the high-power amplifier 5 hits the channel! ' ``At the max output power, the carrier-to-intermodulation noise ratio (
0/I) is the standard C/Eng. Suppose it was.

Ｎチャンネル送出しているときに、送信電力制御により
高出力増幅器５の出力がチャンネルあたりＰＴｎａＸ以
上の出力電力になるとＣ／工けＣ／■ｏ以下になり規格
を満足しなくなる。しかし、送信しているチャン坏ル数
を減らすとＣ／工の規格Ｃ／Ｉｏを満足して高出力増幅
器５のチャンネルあたりの出力電力をＰ］１ａＸ以上に
できる。When transmitting N channels, if the output power of the high-output amplifier 5 becomes more than PTnaX per channel due to transmission power control, the output power becomes less than PTnaX per channel, and the standard is no longer satisfied. However, by reducing the number of channels being transmitted, the output power per channel of the high-output amplifier 5 can be made greater than P]1aX while satisfying the C/Io standard.

第　１　表 第１表は最大１０チヤンネルで各々が隣接し３次歪が支
配的であり、高出力増幅器のＣ／工がＣ／工。Table 1 Table 1 shows that there are a maximum of 10 channels, each adjacent to each other, and third-order distortion is dominant, and the C/factor of a high-output amplifier is the same as that of a high-output amplifier.

全満足するときの１〜１０チヤンネルでのチャンネル必
た９の最大出力電力である。１０チヤンイ・ルではＰ工
ａＸなのに対し、２チヤンネルでは１０．０８ｔＨ３増
加でき、１チヤンイ・ルでは混変調雑音が生じないので
飽和電力まで増加させることができる。This is the maximum output power for channels 1 to 10 when all are satisfied. With 10 channels, the power can be increased by 10.08 tH3, whereas with 2 channels, cross-modulation noise does not occur, so the power can be increased to saturation.

以上の制御は、送イぎ電力制御信号入力端子９の信号よ
り高出力増幅器５の出力レベルを回線状態信号入力端子
７の信号から使用している回線を知り、送信回置制御回
路８によりスイッチ１１〜１ｎを用いて回線ｆ：接続も
しくは断とし、高出力増幅器５で生ずるＣ／工を規格の
ａ／工。を満足させている。In the above control, the output level of the high-output amplifier 5 is determined from the signal at the transmission power control signal input terminal 9, the line being used is determined from the signal at the line status signal input terminal 7, and the transmission position control circuit 8 switches the output level of the high-output amplifier 5. 11 to 1n are used to connect or disconnect the line f, and convert the C/cm generated in the high-output amplifier 5 to the standard a/cm. is satisfied.

上記説明は衛星通信装置について行ったが、見通し内通
化装置その他局波数分割された信号を多重送信する無線
通信装置について、本発明を同様に実施することができ
る。Although the above description has been made regarding a satellite communication device, the present invention can be similarly implemented in a line-of-sight communication device and other wireless communication devices that multiplex transmit signals divided by the number of stations.

〔発明の効果〕〔Effect of the invention〕

本発明は、以上説明したように、送４ｇ出力制御を行っ
ている無線通信送信装置で、アップリンクの降雨減衰が
生じた場合に使用するチャンネル数を限定することによ
り、高出力増幅器の出力を最大飽和電力まで出力できる
優れた効果がある。As explained above, the present invention is a wireless communication transmitter that performs 4G output control, and by limiting the number of channels used when uplink rain attenuation occurs, the output of a high-power amplifier is reduced. It has the excellent effect of being able to output up to the maximum saturation power.

【図面の簡単な説明】[Brief explanation of drawings]

図は本発明一実施例無線通信送信装置のブロック構成図
。 １１〜１ｎ・・・スイッチ、２・・・コンバイナ、３・
・・中間周波増幅器、４・・・アンプコンバータ、５・
・・高出力増幅器、６・・・アンテナ、７・・・回線状
態信号入力端子、８・・・送信回線制御装置、９・・・
電力制御信号入力端子、１０・・・送信電力制御器。 特許出願人　日本電気株式会社 代理人　弁理士　井　出　直　孝The figure is a block diagram of a wireless communication transmitter according to an embodiment of the present invention. 11~1n...switch, 2...combiner, 3...
...Intermediate frequency amplifier, 4...Amplifier converter, 5.
...High output amplifier, 6...Antenna, 7...Line status signal input terminal, 8...Transmission line control device, 9...
Power control signal input terminal, 10... Transmission power controller. Patent applicant: NEC Corporation Representative Patent attorney: Naotaka Ide

Claims (1)

【特許請求の範囲】[Claims] （１）送信電力制御手段を備え、周波数分割された複数
波を送信する無線通信送信装置において、前記送信電力
制御手段は、送信出力を増加させたときに、前記複数波
のうち一部の送信を停止して送信するように構成された
ことを特徴とする無線通信送信装置。(1) In a wireless communication transmitter that includes a transmission power control means and transmits a plurality of frequency-divided waves, the transmission power control means transmits some of the plurality of waves when increasing the transmission output. A wireless communication transmitting device characterized in that it is configured to stop and transmit.
JP14942883A 1983-08-15 1983-08-15 Transmitter of radio communication Pending JPS6041328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14942883A JPS6041328A (en) 1983-08-15 1983-08-15 Transmitter of radio communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14942883A JPS6041328A (en) 1983-08-15 1983-08-15 Transmitter of radio communication

Publications (1)

Publication Number Publication Date
JPS6041328A true JPS6041328A (en) 1985-03-05

Family

ID=15474888

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14942883A Pending JPS6041328A (en) 1983-08-15 1983-08-15 Transmitter of radio communication

Country Status (1)

Country Link
JP (1) JPS6041328A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014239328A (en) * 2013-06-07 2014-12-18 日本電気株式会社 Frequency arrangement device, frequency arrangement method, and program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014239328A (en) * 2013-06-07 2014-12-18 日本電気株式会社 Frequency arrangement device, frequency arrangement method, and program

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