JPH02143719A - Transmission power control system for multicarrier transmission equipment - Google Patents
Transmission power control system for multicarrier transmission equipmentInfo
- Publication number
- JPH02143719A JPH02143719A JP29856188A JP29856188A JPH02143719A JP H02143719 A JPH02143719 A JP H02143719A JP 29856188 A JP29856188 A JP 29856188A JP 29856188 A JP29856188 A JP 29856188A JP H02143719 A JPH02143719 A JP H02143719A
- Authority
- JP
- Japan
- Prior art keywords
- transmission power
- output
- transmission
- power control
- reference voltage
- 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 61
- 239000000969 carrier Substances 0.000 claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Radio Relay Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はマルチキャリア方式を採用したデジタルマイク
ロ波等のマルチキャリア送信装置の送信電力制御方式に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission power control system for a multicarrier transmitter, such as a digital microwave, that employs a multicarrier system.
上述のマルチキャリア方式は、１つの無線送受信装置に
おいて複数の信号により複数の異なる搬送波（キャリア
）を各４独立に変調した複数の変調波を送受信する方式
である。The multicarrier method described above is a method in which a single wireless transmitting/receiving device transmits and receives a plurality of modulated waves in which four different carrier waves are independently modulated using a plurality of signals.
従来送信電力制御回路を有するマルチキャリア送信装置
のブロック図を第２図に示す。FIG. 2 shows a block diagram of a multicarrier transmitter having a conventional transmission power control circuit.
第２図のマルチキャリア送信装置は、変調器２０５．２
０６，２０７，２０８、中間周波合成器２０９、周波数
変換器２１０、送信電力増幅器２１１、送信電力検出器
２１２、送信電力制御部２１３、基準電圧発生部２１４
で構成されている。The multicarrier transmitter in FIG. 2 includes a modulator 205.2.
06, 207, 208, intermediate frequency synthesizer 209, frequency converter 210, transmission power amplifier 211, transmission power detector 212, transmission power control section 213, reference voltage generation section 214
It is made up of.
次に、この送信装置、特に送信電力制御回路の動作につ
いて説明する。Next, the operation of this transmitter, particularly the transmission power control circuit, will be explained.
先ず、入力端子２０１，２０２，２０３，２０４に入力
された信号は各々、変調器２０５，２０６゜２０７．２
０８で複数の異なる搬送波を変調する。First, the signals input to input terminals 201, 202, 203, and 204 are respectively input to modulators 205, 206, and 207.2.
08 to modulate a plurality of different carrier waves.
これら変調器からの変調波は中間周波合成器２０９で合
成され、周波数変換器２１０でたとえばマイクロ波帯へ
周波数変換され、送信電力増幅器２１１で電力増幅され
た後、２分岐され一方は出力端子２１５に送信信号とし
て出力され、他方は送信電力検出器２１２で検波され、
送信電力制御部２１３に入力される。この制御部２１３
は、検出器２１２の出力電圧を基準電圧発生部２１４か
らの基準電圧と比較し、その出力により送信電力が一定
となるように送信電力増幅器２１１を制御していた。The modulated waves from these modulators are combined by an intermediate frequency synthesizer 209, frequency-converted by a frequency converter 210 to, for example, a microwave band, power amplified by a transmission power amplifier 211, and then branched into two, one being an output terminal 215. is output as a transmission signal, and the other is detected by the transmission power detector 212,
The signal is input to the transmission power control section 213. This control section 213
The output voltage of the detector 212 is compared with the reference voltage from the reference voltage generation section 214, and the transmission power amplifier 211 is controlled based on the output so that the transmission power is constant.
上述した従来の送信電力制御回路は、送信する全キャリ
アの送信電力を検出し制御しているため、マルチキャリ
ア方式において、キャリアの数によってキャリアー波当
りの送信出力が変動しシステムゲインが変動してしまう
欠点がある。これを補うため従来の方式では手動により
制御回路の基準電圧を調整する必要があった。The conventional transmission power control circuit described above detects and controls the transmission power of all carriers to be transmitted. Therefore, in a multicarrier system, the transmission power per carrier wave varies depending on the number of carriers, and the system gain fluctuates. There is a drawback. In order to compensate for this, in the conventional system, it was necessary to manually adjust the reference voltage of the control circuit.
本発明の目的は、キャリア数が変化しても各キャリアの
送信電力を一定にするマルチキャリア送信装置の送信電
力制御方式を提供することにある。An object of the present invention is to provide a transmission power control method for a multicarrier transmitter that keeps the transmission power of each carrier constant even if the number of carriers changes.
本発明のマルチキャリア送信装置の送信電力制御方式は
、複数の信号により複数の異なる搬送波を複数の変調器
にて各々変調した後電力増幅して送信信号を発生するマ
ルチキャリア送信装置における前記送信信号の電力を検
出して基準電圧と比較することにより前記送信信号電力
を制御する送信電力制御方式において、
前記複数の変調器のＯＮ−ＯＦＦにより出力するキャリ
ア数を検出する出力キャリア検出部と、前記出力キャリ
ア検出部の出力により前記基準電圧を可変する手段とを
備えている。The transmission power control method of a multicarrier transmitter according to the present invention is such that a plurality of different carrier waves are each modulated by a plurality of modulators using a plurality of signals, and then power amplified to generate a transmission signal. The transmission power control method controls the transmission signal power by detecting the power of the plurality of modulators and comparing it with a reference voltage, the output carrier detection unit detecting the number of carriers output by turning on and off the plurality of modulators; and means for varying the reference voltage based on the output of the output carrier detection section.
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のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
第１図のマルチキャリア送信装置は、変調器１０５．１
０６，１０７，１０８、中間周波合成器１０９、周波数
変換器１１０、送信電力増幅器１１１、送信電力検出器
１１２、送信電力制御部１１３、基準電圧発生部１１４
、出力キャリア検出部１１６で構成されている。The multicarrier transmitter in FIG. 1 includes a modulator 105.1
06, 107, 108, intermediate frequency synthesizer 109, frequency converter 110, transmission power amplifier 111, transmission power detector 112, transmission power control section 113, reference voltage generation section 114
, and an output carrier detection section 116.
次に、この送信装置、特に送信電力制御回路の動作につ
いて説明する。先ず、入力端子１０１゜１０２．１０３
，１０４に入力された信号は変調器１０５．１０６，１
０７，１０８で複数の異なる搬送波を各々変調する。こ
れら変調器の出力変調波は中間周波合成器１０９で合成
され、周波数変換器１１０でマイクロ波帯へ周波数変換
され、送信電力増幅器１１１で電力増幅された後、２分
岐され、一方は出力端子１１５へ出力され、他の一方は
送信電力検出器１１２で検波され送信電力制御部１１３
へ入力される。出力キャリア検出部１１６では各変調器
１０５，１０６，１０７，１０８のＯＮ−ＯＦＦにより
出力キャリア数を検出し、そのキャリア数に応じて基準
電圧発生部１１４から送信電力制御部１１３へ出力する
基準電圧を変化させる。送信電力制御部１１３は、送信
電力検出器１１２から入力した送信電力を基準電圧発生
部１１４からの出力電圧と比較し送信電力増幅器１１１
を制御する。Next, the operation of this transmitter, particularly the transmission power control circuit, will be explained. First, input terminal 101゜102.103
, 104 are input to modulators 105, 106, 1
A plurality of different carrier waves are modulated at 07 and 108, respectively. The output modulated waves of these modulators are combined by an intermediate frequency synthesizer 109, frequency converted to a microwave band by a frequency converter 110, power amplified by a transmission power amplifier 111, and then branched into two branches, one of which is connected to an output terminal 115. The other one is detected by the transmission power detector 112 and sent to the transmission power control section 113.
is input to. Output carrier detection section 116 detects the number of output carriers by turning on and off each modulator 105, 106, 107, 108, and outputs a reference voltage from reference voltage generation section 114 to transmission power control section 113 according to the number of carriers. change. The transmission power control unit 113 compares the transmission power input from the transmission power detector 112 with the output voltage from the reference voltage generation unit 114 and transmits the transmission power to the transmission power amplifier 111.
control.
以上説明したように本発明は、出力キャリア検出部にお
いて送信させるキャリア数を検出し、この情報をもとに
送信電力制御部への基準電圧を変化させることにより、
送信キャリア数に応じて全送信出力を変化させ、キャリ
ア１波当りの送信出力を自動的に一定に保つことによっ
てシステム・ゲインを一定に保つことができる効果があ
る。As explained above, the present invention detects the number of carriers to be transmitted in the output carrier detection section, and changes the reference voltage to the transmission power control section based on this information.
There is an effect that the system gain can be kept constant by changing the total transmission output according to the number of transmission carriers and automatically keeping the transmission output per carrier wave constant.
第１図は本発明の一実施例のブロック図、第２図は従来
の送信電力制御回路のブロック図である。
１０１．１０２，１０３，１０４・・・・・・入力端子
、１０５．１０６，１０７，１０８・・・・・・変調器
、１０９・・・・・・中間周波合成器、１１０・・・・
・・周波数変換器、１１１・・・・・・送信電力増幅器
、１１２・・・・・・送信電力検出器、１１３・・・・
・・送信電力制御部、１１４・・・・・・基準電圧発生
部、１１５・・・・・・出力端子、１１６・・・・・・
出力キャリア検出部。
代理人 弁理士 内 原 晋FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional transmission power control circuit. 101.102, 103, 104... Input terminal, 105.106, 107, 108... Modulator, 109... Intermediate frequency synthesizer, 110...
...Frequency converter, 111... Transmission power amplifier, 112... Transmission power detector, 113...
...Transmission power control unit, 114...Reference voltage generation section, 115...Output terminal, 116...
Output carrier detection section. Agent Patent Attorney Susumu Uchihara
Claims (1)
数の変調器にて各々変調し周波数合成した後電力増幅し
て送信信号を発生するマルチキャリア送信装置における
前記送信信号の電力を検出して基準電圧と比較すること
により前記送信信号の電力を制御する送信電力制御方式
において、前記複数の変調器のＯＮ−ＯＦＦにより出力
するキャリア数を検出する出力キャリア検出部と、前記
出力キャリア検出部の出力により前記基準電圧を可変す
る手段とを備えたことを特徴とするマルチキャリア送信
装置の送信電力制御方式。A multicarrier transmitter generates a transmission signal by modulating a plurality of different carrier waves (carriers) with a plurality of signals using a plurality of modulators, frequency-synthesizing the signals, and amplifying the power.The power of the transmission signal is detected and set as a reference voltage. In the transmission power control method, the transmission power control method controls the power of the transmission signal by comparing the power of the transmission signal with an output carrier detection section that detects the number of carriers output by turning on and off the plurality of modulators; A transmission power control method for a multicarrier transmitter, comprising means for varying the reference voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29856188A JPH02143719A (en) | 1988-11-25 | 1988-11-25 | Transmission power control system for multicarrier transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29856188A JPH02143719A (en) | 1988-11-25 | 1988-11-25 | Transmission power control system for multicarrier transmission equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02143719A true JPH02143719A (en) | 1990-06-01 |
Family
ID=17861337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29856188A Pending JPH02143719A (en) | 1988-11-25 | 1988-11-25 | Transmission power control system for multicarrier transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02143719A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257415A (en) * | 1991-03-20 | 1993-10-26 | Fujitsu Limited | Automatic transmission level control device |
| US5551070A (en) * | 1993-01-28 | 1996-08-27 | Telefonaktiebolaget Lm Ericsson | Cartesian multicarrier feedback |
| JPH11163807A (en) * | 1997-09-29 | 1999-06-18 | Matsushita Electric Ind Co Ltd | Communication system, transmitter and receiver |
| JP2008109710A (en) * | 1997-09-29 | 2008-05-08 | Matsushita Electric Ind Co Ltd | Communication system |
| JP2008148343A (en) * | 1997-09-29 | 2008-06-26 | Matsushita Electric Ind Co Ltd | Communication systems |
-
1988
- 1988-11-25 JP JP29856188A patent/JPH02143719A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5257415A (en) * | 1991-03-20 | 1993-10-26 | Fujitsu Limited | Automatic transmission level control device |
| US5551070A (en) * | 1993-01-28 | 1996-08-27 | Telefonaktiebolaget Lm Ericsson | Cartesian multicarrier feedback |
| JPH11163807A (en) * | 1997-09-29 | 1999-06-18 | Matsushita Electric Ind Co Ltd | Communication system, transmitter and receiver |
| JP2008109710A (en) * | 1997-09-29 | 2008-05-08 | Matsushita Electric Ind Co Ltd | Communication system |
| JP2008148343A (en) * | 1997-09-29 | 2008-06-26 | Matsushita Electric Ind Co Ltd | Communication systems |
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