JPH0522189A - Transmission power control method - Google Patents
Transmission power control methodInfo
- Publication number
- JPH0522189A JPH0522189A JP3176417A JP17641791A JPH0522189A JP H0522189 A JPH0522189 A JP H0522189A JP 3176417 A JP3176417 A JP 3176417A JP 17641791 A JP17641791 A JP 17641791A JP H0522189 A JPH0522189 A JP H0522189A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- level
- transmission
- indicating
- reception
- 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.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims description 7
- 230000005856 abnormality Effects 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000002159 abnormal effect Effects 0.000 claims abstract description 5
- 230000003321 amplification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 238000005562 fading Methods 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000013075 data extraction Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Transceivers (AREA)
- Transmitters (AREA)
Abstract
(57)【要約】
【目的】対向する一方の送受信装置側から送信電力を制
御する他方の送受信装置側へ受信レベルを示す制御デー
タを伝送することなく、一方の送受信装置側での受信レ
ベルを一定にできるようにする。
【構成】レベル検出部１は、相手局の送信信号Ｓ２を受
信して受信レベルを検出し受信レベルを示す信号Ｌ１を
送出する。利得制御部２は、受信レベルを示す信号Ｌ１
と、基準設定部４が出力する基準レベルを示す信号Ｌｓ
とを比較して利得制御信号Ｌ２を生成する。可変利得増
幅部３は、利得制御信号Ｌ２に応じて送信信号Ｓ１の送
信電力を変化させる。異常検知部５は、受信レベルを示
す信号Ｌ１が異常値を示したときに異常検知信号Ａを切
替部６へ送出する。切替部６は、通常、受信レベルを示
す信号Ｌ１を選択するが、異常検知信号Ａを受けたとき
は、基準レベルを示す信号Ｌｓを選択して利得制御部２
へ送出する。
(57) [Abstract] [Purpose] The reception level on one transmission / reception device side is transmitted without transmitting control data indicating the reception level from the transmission / reception device side on the opposite side to the transmission / reception device side on the other side. Be able to keep it constant. [Structure] A level detection unit 1 receives a transmission signal S2 of a partner station, detects a reception level, and outputs a signal L1 indicating the reception level. The gain control unit 2 uses the signal L1 indicating the reception level.
And a signal Ls indicating the reference level output from the reference setting unit 4.
And are compared to generate a gain control signal L2. The variable gain amplifier 3 changes the transmission power of the transmission signal S1 according to the gain control signal L2. The abnormality detection unit 5 sends the abnormality detection signal A to the switching unit 6 when the signal L1 indicating the reception level indicates an abnormal value. The switching unit 6 normally selects the signal L1 indicating the reception level, but when receiving the abnormality detection signal A, selects the signal Ls indicating the reference level and selects the gain control unit 2.
Send to.
Description
【０００１】[0001]
【産業上の利用分野】本発明は送信電力制御方式に関
し、特にマイクロ波送受信装置等において、互いに対向
する一方の送受信装置の受信レベルが一定となるよう
に、他方の送受信装置の送信電力を制御する送信電力制
御方式に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission power control system, and more particularly, in a microwave transmission / reception device or the like, the transmission power of another transmission / reception device is controlled so that the reception level of the other transmission / reception device is constant. Transmission power control method.
【０００２】[0002]
【従来の技術】従来の送信電力制御方式は、図２に示す
ように、互いに対向する一方の送受信装置２１側で、レ
ベル検出部２２により、対向する他方の送受信装置１１
が送出する信号Ｓ１の受信レベルを検出し、制御データ
挿入部２３により、受信レベルを示す制御データを主信
号に挿入し、増幅部２４から信号Ｓ２として他方の送受
信装置１１へ送出している。2. Description of the Related Art In a conventional transmission power control method, as shown in FIG. 2, on the side of one transmitting / receiving device 21 facing each other, a level detecting section 22 controls the other transmitting / receiving device 11 facing each other.
Detects the reception level of the signal S1 transmitted by the control signal insertion section 23, inserts the control data indicating the reception level into the main signal by the control data insertion section 23, and outputs the signal S2 from the amplification section 24 to the other transmission / reception device 11.
【０００３】また、他方の送受信装置１１は、制御デー
タ抽出部１２により、受信した信号Ｓ２から受信レベル
を示す制御データを抽出し、利得制御部１３により、基
準設定部１４が設定した基準値と制御データが示す受信
レベルとを比較して可変利得増幅部１５の利得を制御
し、対向する送受信装置２１が受信する信号Ｓ１の受信
レベルが一定となるようにしている。In the other transmitter / receiver 11, the control data extraction unit 12 extracts control data indicating the reception level from the received signal S2, and the gain control unit 13 uses the reference value set by the reference setting unit 14 as the reference value. The gain of the variable gain amplifying section 15 is controlled by comparing with the reception level indicated by the control data, so that the reception level of the signal S1 received by the opposing transmission / reception device 21 becomes constant.
【０００４】[0004]
【発明が解決しようとする課題】上述した従来の送信電
力制御方式では、一方の送受信装置側には、受信レベル
を検知し、受信レベルを示す制御データを主信号に挿入
して送出する手段を設け、また、他方の送受信装置側に
は、一方の送受信装置からの制御データを受信して送信
出力を制御する手段を設けるため、装置構成が大型化す
る。また、主信号に制御データを挿入したり、主信号か
ら制御データを抽出したりするために、主信号に歪等が
発生するという問題点を有している。In the above-described conventional transmission power control system, one transmitting / receiving device has a means for detecting the reception level, inserting control data indicating the reception level in the main signal, and transmitting the control data. Since the other transmission / reception device side is provided with means for receiving the control data from one transmission / reception device and controlling the transmission output, the size of the device is increased. Further, there is a problem that distortion or the like occurs in the main signal because the control data is inserted into the main signal or the control data is extracted from the main signal.
【０００５】本発明の目的は、受信レベルを示す制御デ
ータを伝送することなく、対向する送受信装置の受信レ
ベルが一定となるように送信電力を制御できる送信電力
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 capable of controlling the transmission power so that the reception level of the opposite transmission / reception device becomes constant without transmitting control data indicating the reception level.
【０００６】[0006]
【課題を解決するための手段】本発明の送信電力制御方
式は、対向する一方の送受信装置の受信レベルが一定と
なるように他方の送受信装置の送信電力を制御する送信
電力制御方式において、前記他方の送受信装置は、前記
一方の送受信装置が送出する信号を受信して受信レベル
を示す信号を出力する受信レベル検出手段と、利得制御
信号に応じて送信電力を変化させる可変利得増幅手段
と、基準レベルを示す信号を生成する基準設定手段と、
前記基準レベルを示す信号および前記受信レベルを示す
信号を受けて比較して前記利得制御信号を生成する利得
制御手段とを備える構成である。また、前記受信レベル
を示す信号が異常値を示したことを検知する異常検知手
段と、前記基準レベルを示す信号および前記受信レベル
を示す信号を受け前記異常検知手段が異常を検知したと
きに前記基準レベルを示す信号を選択して前記利得制御
手段へ送出する切替手段とを具備して構成してもよい。The transmission power control system of the present invention is a transmission power control system for controlling the transmission power of another transmission / reception device so that the reception level of the other transmission / reception device is constant. The other transmission / reception device receives a signal transmitted by the one transmission / reception device and outputs a signal indicating a reception level, and a variable gain amplification unit that changes transmission power according to a gain control signal, Reference setting means for generating a signal indicating the reference level,
Gain control means for receiving the signal indicating the reference level and the signal indicating the reception level for comparison and generating the gain control signal. Further, the abnormality detection means for detecting that the signal indicating the reception level indicates an abnormal value, and the abnormality detection means when the abnormality detection means receives the signal indicating the reference level and the signal indicating the reception level. Switching means for selecting a signal indicating the reference level and sending it to the gain control means may be provided.
【０００７】[0007]
【実施例】次に本発明について図面を参照して説明す
る。The present invention will be described below with reference to the drawings.
【０００８】一般的に、対向局間で送受信を行う場合、
広帯域フェージング時の自局の受信レベルの変動と相手
局の受信レベルの変動はほぼ同じと見做すことができ
る。従って、相手局からの信号の受信レベルに応じて送
信電力を制御することにより、送信信号の相手局での受
信レベルを一定にすることができる。Generally, when transmitting and receiving between opposite stations,
It can be considered that the fluctuation of the reception level of the own station and the fluctuation of the reception level of the partner station during wideband fading are almost the same. Therefore, by controlling the transmission power according to the reception level of the signal from the partner station, the reception level of the transmission signal at the partner station can be made constant.
【０００９】図１は本発明の一実施例を示すブロック図
であり、送信電力を制御する側のブロック図を示してい
る。FIG. 1 is a block diagram showing an embodiment of the present invention, which is a block diagram on the side for controlling transmission power.
【００１０】ここで、レベル検出部１は、相手局からの
信号Ｓ２を受信して受信レベルを検出し、受信レベルを
示す信号Ｌ１を送出する。利得制御部２は、受信レベル
を示す信号Ｌ１と、基準設定部４が出力する基準レベル
を示す信号Ｌｓとを比較し、レベル差に応じて利得制御
信号Ｌ２を生成する。可変利得増幅部３は、利得制御信
号Ｌ２に応じて送信電力を変化させ、送信信号Ｓ１を相
手局へ送出する。このようにすることにより、広帯域フ
ェージング時、送信信号Ｓ１の相手局での受信レベルを
一定にすることができる。Here, the level detector 1 receives the signal S2 from the partner station, detects the reception level, and sends out the signal L1 indicating the reception level. The gain control unit 2 compares the signal L1 indicating the reception level with the signal Ls indicating the reference level output by the reference setting unit 4, and generates the gain control signal L2 according to the level difference. The variable gain amplifying unit 3 changes the transmission power according to the gain control signal L2 and sends the transmission signal S1 to the partner station. By doing so, the reception level of the transmission signal S1 at the partner station can be made constant during wideband fading.
【００１１】ところで、レベル検出部１に障害が発生
し、受信レベルを示す信号Ｌ１が異常なレベル低下を示
すような場合には、可変利得増幅部３の利得が異常に増
大して送信出力が過大となり、例えば隣接チャネルに妨
害を与える等の影響がでる。このような事態を防止する
ために、異常検知部５および切替部６を設けている。By the way, when the level detecting section 1 fails and the signal L1 indicating the receiving level shows an abnormal level drop, the gain of the variable gain amplifying section 3 increases abnormally and the transmission output is increased. It becomes excessively large, and influences such as interference in adjacent channels occur. In order to prevent such a situation, the abnormality detection unit 5 and the switching unit 6 are provided.
【００１２】異常検知部５は、受信レベルを示す信号Ｌ
１が異常値を示したときに異常検知信号Ａを切替部６へ
送出する。切替部６は、通常、受信レベルを示す信号Ｌ
１を選択して利得制御部２へ送出しているが、異常検知
信号Ａを受けたときは、基準レベルを示す信号Ｌｓを選
択する。利得制御部２は、所定値に送信出力を保持する
利得制御信号Ｌ２を生成して可変利得増幅部３へ送出す
る。The abnormality detecting section 5 receives a signal L indicating the reception level.
When 1 indicates an abnormal value, the abnormality detection signal A is sent to the switching unit 6. The switching unit 6 normally receives the signal L indicating the reception level.
Although 1 is selected and sent to the gain control unit 2, when the abnormality detection signal A is received, the signal Ls indicating the reference level is selected. The gain control unit 2 generates a gain control signal L2 that holds the transmission output at a predetermined value and sends it to the variable gain amplification unit 3.
【００１３】[0013]
【発明の効果】以上説明したように本発明によれば、広
帯域フェージング時、自局の受信レベルの変動と相手局
の受信レベルの変動はほぼ同じであることを利用して、
相手局からの信号の受信レベルを検出し、この受信レベ
ルと基準レベルとを比較して利得制御信号を生成し、可
変利得増幅部の利得を変化させて送信電力を制御するこ
とにより、相手局の受信レベルを一定にできる。従っ
て、従来のように、受信レベルを示すデータを主信号に
挿入して送信電力制御側に伝送しなくてもよいので、装
置構成が簡略化でき、主信号に悪影響を与えることもな
い。更に、受信レベルを示す信号の異常を検知する異常
検知部および、異常検知時に基準レベルを示す信号を選
択する切替部を設けることにより、可変利得増幅部の出
力が過大となって隣接チャネル等に妨害を与えるのを防
止できる。As described above, according to the present invention, the fact that the fluctuation of the reception level of the own station and the fluctuation of the reception level of the partner station are substantially the same during wide band fading,
By detecting the reception level of the signal from the partner station, comparing this reception level with the reference level to generate a gain control signal, and changing the gain of the variable gain amplifier to control the transmission power, the partner station The reception level of can be made constant. Therefore, it is not necessary to insert the data indicating the reception level into the main signal and transmit it to the transmission power control side as in the conventional case, so that the device configuration can be simplified and the main signal is not adversely affected. Further, by providing an abnormality detection unit that detects an abnormality in the signal indicating the reception level and a switching unit that selects the signal indicating the reference level when the abnormality is detected, the output of the variable gain amplification unit becomes excessive and the adjacent channel or the like is output. It can prevent interference.
【図１】本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】従来の送信電力制御方式の一例を示すブロック
図である。FIG. 2 is a block diagram showing an example of a conventional transmission power control method.
１ レベル検出部 ２ 利得制御部 ３ 可変利得増幅部 ４ 基準設定部 ５ 異常検知部 ６ 切替部 Ｌ１ 受信レベルを示す信号 Ｌ２ 利得制御信号 Ｌｓ 基準レベルを示す信号 1 Level detector 2 Gain control section 3 Variable gain amplifier 4 Standard setting section 5 Abnormality detector 6 switching unit Signal indicating the L1 reception level L2 gain control signal Ls signal indicating reference level
───────────────────────────────────────────────────── フロントページの続き (72)発明者 鈴木 康司 東京都港区三田一丁目４番28号日本電気ト ランスミツシヨンエンジニアリング株式会 社内 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Koji Suzuki 1-chome Mita 4-28, Minato-ku, Tokyo NEC Corporation Lance Mission Engineering Co., Ltd. In-house
Claims (2)
が一定となるように他方の送受信装置の送信電力を制御
する送信電力制御方式において、前記他方の送受信装置
は、前記一方の送受信装置が送出する信号を受信して受
信レベルを示す信号を出力する受信レベル検出手段と、
利得制御信号に応じて送信電力を変化させる可変利得増
幅手段と、基準レベルを示す信号を生成する基準設定手
段と、前記基準レベルを示す信号および前記受信レベル
を示す信号を受けて比較して前記利得制御信号を生成す
る利得制御手段とを備えることを特徴とする送信電力制
御方式。1. A transmission power control method for controlling the transmission power of another transmission / reception device so that the reception level of one transmission / reception device facing each other becomes constant, and the transmission / reception device of the other transmits the transmission power of the other transmission / reception device. Receiving level detecting means for receiving a signal for outputting a signal indicating a receiving level,
Variable gain amplifying means for changing the transmission power according to a gain control signal, reference setting means for generating a signal indicating a reference level, and receiving the signal indicating the reference level and the signal indicating the reception level for comparison, And a gain control means for generating a gain control signal.
て、前記受信レベルを示す信号が異常値を示したことを
検知する異常検知手段と、前記基準レベルを示す信号お
よび前記受信レベルを示す信号を受け前記異常検知手段
が異常を検知したときに前記基準レベルを示す信号を選
択して前記利得制御手段へ送出する切替手段とを具備す
ることを特徴とする送信電力制御方式。2. The transmission power control method according to claim 1, wherein an abnormality detecting means for detecting that the signal indicating the reception level shows an abnormal value, a signal indicating the reference level, and a signal indicating the reception level. And a switching means for selecting the signal indicating the reference level and transmitting it to the gain control means when the abnormality detection means detects an abnormality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3176417A JP2833882B2 (en) | 1991-07-17 | 1991-07-17 | Transmission power control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3176417A JP2833882B2 (en) | 1991-07-17 | 1991-07-17 | Transmission power control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0522189A true JPH0522189A (en) | 1993-01-29 |
| JP2833882B2 JP2833882B2 (en) | 1998-12-09 |
Family
ID=16013332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3176417A Expired - Lifetime JP2833882B2 (en) | 1991-07-17 | 1991-07-17 | Transmission power control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2833882B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5881343A (en) * | 1981-11-10 | 1983-05-16 | Keisatsuchiyou Chokan | Duplex transmitter and receiver for controlling transmission output according to intensity of received electric field |
| JPH0243034U (en) * | 1988-09-16 | 1990-03-26 |
-
1991
- 1991-07-17 JP JP3176417A patent/JP2833882B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5881343A (en) * | 1981-11-10 | 1983-05-16 | Keisatsuchiyou Chokan | Duplex transmitter and receiver for controlling transmission output according to intensity of received electric field |
| JPH0243034U (en) * | 1988-09-16 | 1990-03-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2833882B2 (en) | 1998-12-09 |
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