JPH02148920A - Transmission power controller for portable radio equipment - Google Patents
Transmission power controller for portable radio equipmentInfo
- Publication number
- JPH02148920A JPH02148920A JP63303417A JP30341788A JPH02148920A JP H02148920 A JPH02148920 A JP H02148920A JP 63303417 A JP63303417 A JP 63303417A JP 30341788 A JP30341788 A JP 30341788A JP H02148920 A JPH02148920 A JP H02148920A
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- Prior art keywords
- circuit
- transmission
- portable radio
- transmission power
- 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.)
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 56
- 230000005684 electric field Effects 0.000 abstract description 16
- 238000001514 detection method Methods 0.000 abstract description 7
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- 230000003321 amplification Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008451 emotion Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
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- Transceivers (AREA)
Abstract
Description
【発明の詳細な説明】
〔概要〕
携帯型無線機の送信電力制御装置に関し、送信電力を制
御することによって電池寿命を延ばすことができる携帯
型無線機の送信電力制御装置を提供することを目的とし
、
複信方式の携帯型無線機においては、受信回路より検出
される検出受信レベルと基準値とを比較する比較回路と
、該比較回路の出力レベルに応じて送信回路の送信電力
を制御する送信制御回路とを備えた構成とし、
単信方式の携帯型無線機においては、更に、送信期間に
その直前の受信期間の上記検出受信レベルを保持する保
持制御回路を備えた構成とする。[Detailed Description of the Invention] [Summary] An object of the present invention is to provide a transmission power control device for a portable radio device that can extend battery life by controlling transmission power. A duplex type portable radio device includes a comparison circuit that compares the detected reception level detected by the reception circuit with a reference value, and a comparison circuit that controls the transmission power of the transmission circuit according to the output level of the comparison circuit. In the simplex type portable radio device, the transmitter further includes a holding control circuit that holds the detected reception level of the immediately preceding receiving period during the transmitting period.
本発明は携帯型無線機に関し、特に携帯型無線機の電池
寿命を有効に利用する送信電力制御装置に関する。The present invention relates to a portable radio device, and more particularly to a transmission power control device that effectively utilizes the battery life of the portable radio device.
第８図は同時に送受信を行う従来の複信方式の携帯型無
線機の一例を示すものである。電池７は電源回路６に接
続され、該電源回路６から送信回路３に供給される電圧
Ｖｔと受信回路４に供給される電圧Ｖｒを発生させる。FIG. 8 shows an example of a conventional duplex type portable radio device that simultaneously transmits and receives data. The battery 7 is connected to a power supply circuit 6 and generates a voltage Vt supplied from the power supply circuit 6 to the transmitting circuit 3 and a voltage Vr supplied to the receiving circuit 4.
マイク８から入力された音声信号は送信回路３で変調、
増幅され、アンテナ５から送信電波となって放射される
。また、アンテナ５から入力された受信電波は、受信回
路４で増幅、復調され、スピーカ９から音声として聞く
ことができる。また、第９図は従来の単信方式の携帯型
無線機の一例を示すものである。ブレストークスイッチ
１１を押すことによって電源回路６から送信回路３に電
圧Ｖｔが供給されて送信回路３が作動して送信状態にな
るとともに、受信回路４の作動は停止される。また、ブ
レストークスイッチ１１を離すことによって電源回路６
から受信回路４に電圧Ｖｒが供給され受信回路４が作動
して受信状態となるとともに、送信回路３の作動は停止
される。音声の送受信は通常マイク兼用スピーカ１０で
行われる。The audio signal input from the microphone 8 is modulated by the transmission circuit 3,
It is amplified and radiated from the antenna 5 as a transmission radio wave. Further, the received radio waves input from the antenna 5 are amplified and demodulated by the receiving circuit 4, and can be heard as audio from the speaker 9. Further, FIG. 9 shows an example of a conventional simplex system portable radio device. By pressing the breath talk switch 11, the voltage Vt is supplied from the power supply circuit 6 to the transmitting circuit 3, and the transmitting circuit 3 is activated and becomes a transmitting state, while the operation of the receiving circuit 4 is stopped. Also, by releasing the breath talk switch 11, the power supply circuit 6
Voltage Vr is supplied to the receiving circuit 4 from the receiving circuit 4, and the receiving circuit 4 is activated and enters the receiving state, while the operation of the transmitting circuit 3 is stopped. Transmission and reception of audio is normally performed using a speaker 10 that also serves as a microphone.
第１０図は上記のような携帯型無線機１と基地局無線機
２との相対関係を示す概念図であり各無線機１又は２の
受信点の電界強度Ｅ （Ｅ２．又はＥ、２）は、平面大
地伝搬の場合次式で与えられる。FIG. 10 is a conceptual diagram showing the relative relationship between the portable radio device 1 and the base station radio device 2 as described above, and shows the electric field strength E (E2. or E, 2) at the receiving point of each radio device 1 or 2. is given by the following equation in the case of planar ground propagation.
ここで、ｈ、、ｈ、は無線機の地上からの高さ、Ｇはア
ンテナの相対利得、Ｐは送信電力、ｄは無線機間の距離
である。更に、第１１図は携帯型無線機１から放射され
る電波によって基地局無線機２の位置の電界強度Ｅｅ＋
に対する基地局無線機２の受信Ｓ／Ｎ特性を示す。無線
機間の距離ｄが短くなってくるとＥｌｌは強くなり、受
信Ｓ／Ｎも大きくなる。移動無線では通常Ｓ／Ｎが３０
ｄＢ以上であれば、雑音は殆ど気にならず、通話は全く
支障ない。Here, h, , h is the height of the radio from the ground, G is the relative gain of the antenna, P is the transmission power, and d is the distance between the radios. Furthermore, FIG. 11 shows that the electric field strength Ee+ at the position of the base station radio device 2 is increased by the radio waves radiated from the portable radio device 1.
2 shows the reception S/N characteristics of the base station radio device 2 for the following. As the distance d between the radios becomes shorter, Ell becomes stronger and the reception S/N also becomes larger. In mobile radio, the S/N is usually 30.
If it is dB or higher, the noise is almost unnoticeable and calls are not affected at all.
第８図または、第９図に示した従来の携帯型無線機の場
合、送信電力Ｐ２は一定である。従って、距離ｄが短く
なってくると基地局無線機の受信電界強度Ｅｌｌは強く
なり、基地局無線機２の受信Ｓ／Ｎは大きくなる。Ｓ／
Ｎが３０ｄＢ以上では基地局無線機２の受信電界強度Ｅ
２−（ｓ／Ｎ＝３０ｄＢとなるときの基準受信電界強度
Ｅｓより不必要に大きくなっていると言える。すなわち
、携帯型無線機１ではそれだけ、不必要に送信電力Ｐ２
が大きくなっており、消費電力Ｐｄ、を無駄使いし、電
池寿命を縮める要因になっている。In the case of the conventional portable radio shown in FIG. 8 or 9, the transmission power P2 is constant. Therefore, as the distance d becomes shorter, the received electric field strength Ell of the base station radio becomes stronger, and the reception S/N of the base station radio becomes larger. S/
When N is 30 dB or more, the received electric field strength E of the base station radio 2
It can be said that the received electric field strength Es is unnecessarily larger than the reference received electric field strength Es when 2-(s/N=30 dB. In other words, in the portable radio device 1, the transmission power P2 is unnecessarily large.
is increasing, resulting in wasted power consumption Pd, which shortens battery life.
この発明は上記従来の事情に鑑みて提案されたものであ
って、送信電力を制御することによって電池寿命を延ば
すことができる携帯型無線機の送信電力制御装置を提供
することを目的とする。The present invention has been proposed in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a transmission power control device for a portable radio device that can extend battery life by controlling transmission power.
〔課題を解決するための手段］
上記目的を達成するためにこの発明は以下のような手段
を採用している。すなわち、複信方式の携帯型無線機に
おいては、第１図に示すように受信回路４より検出され
る検出受信レベルＶｄと基準値Ｖｓとを比較する比較回
路２３と、該比較回路２３の出力レベルＶｄに応じて送
信回路３の送信電力を制御する送信制御回路２１とを備
えるようにし、また単信方式の携帯型無線機においては
、第５図に示すように更に、送信期間にその直前の受信
期間の上記検出受信レベルを下記送信制御回路２１に保
持させる保持制御回路２４とを備える構成としたもので
ある。[Means for Solving the Problems] In order to achieve the above object, the present invention employs the following means. That is, in a duplex type portable radio device, as shown in FIG. A transmission control circuit 21 is provided to control the transmission power of the transmission circuit 3 according to the level Vd, and in a simplex system portable radio device, as shown in FIG. This configuration includes a holding control circuit 24 that causes the transmission control circuit 21 described below to hold the detected reception level during the reception period.
（作 用〕
第１図に示す比較回路２３の比較基準値Ｖｓとして、基
地局無線機２の位置の電界強度Ｅｉｌ＋が基準電界強度
Ｅｓとなるときの検出受信レベルの値を設定すると、受
信検出レベルが基準値以上になったとき、比較回路２３
が送信制御回路２１を作動させる。送信制御回路２１で
は第３図に点線で示すように基地局無線機２の受信電界
強度ＥＺＩがＥｇｔ’ のようにＥｓに近い値を維持す
るように、携帯型無線機ｌの送信電力Ｐ２を制御し、そ
の結果送信電力はＰ２゛のように下がり、また、消費電
力Ｐｄ、はＰｄ、°のように下がる。(Function) If the value of the detection reception level when the electric field strength Eil+ at the position of the base station radio 2 becomes the reference electric field strength Es is set as the comparison reference value Vs of the comparison circuit 23 shown in FIG. When the level exceeds the reference value, the comparison circuit 23
activates the transmission control circuit 21. The transmission control circuit 21 controls the transmission power P2 of the portable radio device 1 so that the received electric field strength EZI of the base station radio device 2 maintains a value close to Es, such as Egt', as shown by the dotted line in FIG. As a result, the transmission power decreases as P2', and the power consumption Pd decreases as Pd,°.
単信式の携帯型無線機では、受信と送信は同時にできな
いので、受信期間中の検出受信レベルを次の送信期間中
保持する必要がある。そのために送受の切換と連動して
作動する保持制御回路が設けられる。Since a simplex type portable radio cannot receive and transmit at the same time, it is necessary to maintain the detected reception level during the reception period during the next transmission period. For this purpose, a holding control circuit is provided that operates in conjunction with switching between transmission and reception.
第１図は同時送受話を行うことができる複信方式の携帯
型無線機に本発明を適用した場合の一実施例構成図を示
すものであって、第８図の従来例と同一部分は同一符号
を付して説明を省略する。FIG. 1 shows a configuration diagram of an embodiment in which the present invention is applied to a duplex type portable radio device that can perform simultaneous transmission and reception, and the same parts as the conventional example shown in FIG. The same reference numerals are used to omit the explanation.
また、第３図、第４図は本発明の詳細な説明するための
特性図を示す。Further, FIGS. 3 and 4 show characteristic diagrams for explaining the present invention in detail.
受信回路４がＦＭタイプの場合は通常中間周波増幅段の
出力を利用して受信レベルを検出することができ、また
、受信回路４がＡＭタイプの場合は自動ゲインコントロ
ール回路の出力を利用すると受信レベルを検出すること
ができる。そこでこれ等受信回路４に内蔵される受信レ
ベル検出回路で検出された検出受信レベル信号Ｖｄは比
較回路２３に入力され、ここで基準電圧Ｖｓと比較され
てコントロール信号Ｖｃを得る。この基準電圧■Ｓは携
帯型無線機１の送信により基地局無線機２のＳ／Ｎが３
０ｄＢになるときの基地局無線機２の基準電界強度Ｅ、
に対応している。このコントロール信号Ｖｃは上記受信
電界強度ＥｌｌがＥｓより小さ（なったとき、“Ｌ″レ
ベルなり、また、受信電界強度Ｅｔ’ｌがＥＳより大き
くなったとき、“Ｈ”レベルとなって下記送信電力制御
回路２１に入力される。When the receiving circuit 4 is of the FM type, the reception level can be detected using the output of the intermediate frequency amplification stage, and when the receiving circuit 4 is of the AM type, the reception level can be detected using the output of the automatic gain control circuit. level can be detected. Therefore, the detected reception level signal Vd detected by the reception level detection circuit built in the reception circuit 4 is input to the comparison circuit 23, where it is compared with the reference voltage Vs to obtain the control signal Vc. This reference voltage ■S is transmitted by the portable radio device 1 so that the S/N of the base station radio device 2 is 3.
The reference electric field strength E of the base station radio device 2 when it becomes 0 dB,
It corresponds to This control signal Vc becomes the "L" level when the received electric field strength Ell becomes smaller than Es, and becomes the "H" level when the received electric field strength Et'l becomes greater than ES, and transmits the following data. It is input to the power control circuit 21.
第２図は送信制御回路２１の一実施例を示すものである
。基準電圧Ｖｓと検出受信電圧Ｖｄは減算回路２１ａに
入力され、ここでＶｓ−Ｖｄなる減算が行われる。この
結果は前記コントロール信号Ｖｃによって制御される選
択回路２１ｂに入力され、この選択回路２１ｂの出力は
コントロール信号Ｖｃが“Ｌ”レベルのとき、すなわち
、Ｖｄ＜Ｖｓのとき“零”となり、コントロール信号Ｖ
Ｃが“Ｈ”レベルのとき、すなわち、Ｖｄ＞Ｖｓのとき
“Ｖｓ−Ｖｄ”となる。この選択回路２１ｂの出力は加
算回路２１Ｃに入力され、ここで電源電圧Ｖｔとの和が
とられてＶｃｃ電圧として送信回路３の電力増幅段に入
力される。この構成によって、Ｖｄ＜Ｖｓのときは電源
電圧ＶｔがそのままＶｃｃ電圧となり、Ｖｄ＞Ｖｓのと
きはｖｔ＋Ｖｓ−ＶｄがＶｃｃ電圧となって送信電力Ｐ
２が第３図破線に示すように、あるいは第４図に示すよ
うに制御されることになり、このとき更に、基地局無線
機２の受信電界強度Ｅｚｔは第３図に破線で示すように
基準電界強度Ｅｓ付近を保つことになる。FIG. 2 shows an embodiment of the transmission control circuit 21. In FIG. The reference voltage Vs and the detected received voltage Vd are input to the subtraction circuit 21a, where a subtraction of Vs-Vd is performed. This result is input to the selection circuit 21b controlled by the control signal Vc, and the output of this selection circuit 21b becomes "zero" when the control signal Vc is at "L" level, that is, when Vd<Vs, and the control signal V
When C is at the "H" level, that is, when Vd>Vs, it becomes "Vs-Vd". The output of the selection circuit 21b is input to an adder circuit 21C, where the sum is calculated with the power supply voltage Vt, and the sum is input to the power amplification stage of the transmission circuit 3 as a Vcc voltage. With this configuration, when Vd<Vs, the power supply voltage Vt becomes the Vcc voltage, and when Vd>Vs, vt+Vs-Vd becomes the Vcc voltage, and the transmission power P
2 is controlled as shown by the broken line in FIG. 3 or as shown in FIG. The electric field strength will be maintained near the reference electric field strength Es.
第５図は単信方式の携帯型無線機に本発明を適用した場
合の実施例構成図を示す。第５図において第９図の従来
例と同一部分は同一符号を付して説明を省略する。また
、送信電力を制御する構成は基本的に第１図に示した構
成と同じであるが、単信方式の場合、送信と受信がブレ
ストークスイッチ１１のＯＮ、ＯＦＦに応じて交互に行
われるため、受信期間に受信回路４の受信レベル検出回
路より得られる検出受信レベルＶｄを送信期間もそのま
ま保持しておく必要があり、そのために保持制御回路２
４が設けられる。FIG. 5 shows a configuration diagram of an embodiment in which the present invention is applied to a simplex type portable radio device. In FIG. 5, parts that are the same as those in the conventional example shown in FIG. 9 are given the same reference numerals, and explanations thereof will be omitted. Furthermore, the configuration for controlling the transmission power is basically the same as the configuration shown in FIG. Therefore, it is necessary to hold the detected reception level Vd obtained by the reception level detection circuit of the reception circuit 4 during the reception period as it is during the transmission period.
4 is provided.
第６図は上記保持制御回路２４の概略を示すブロック図
であり、第７図はそのタイミングチャートである。ブレ
ストークスイッチ１１のＯＮ、ＯＦＦに対応したモード
切換信号■１ （第７図（１））が立上がり検出回路２
４ａに入力される。ここで、ブレストークスイッチ１１
がＯＮされると（送信期間になると）該立上がり検出回
路２４ａからは保持、指令信号Ｖ、（第７図（２））が
サンプルホールド回路２４ｂに入力され、ブレストーク
スイッチ１１がＯＮされる前の受信期間の検出受信レベ
ルＶｄ（第７図（６））が、該サンプルホールド回路２
４ｂに保持される。この保持された値Ｖ’ ｄ （第
７図（７））が第１図の場合の検出受信レベルＶｄに代
わって比較回路２３及び送信制御回路２１に入力され、
送信電力Ｐ２の制御に供される。FIG. 6 is a block diagram schematically showing the holding control circuit 24, and FIG. 7 is a timing chart thereof. When the mode switching signal ■1 (Fig. 7 (1)) corresponding to ON and OFF of the breath talk switch 11 rises, the detection circuit 2
4a. Here, breath talk switch 11
When turned on (in the transmission period), the hold command signal V (FIG. 7 (2)) is input from the rise detection circuit 24a to the sample hold circuit 24b, and before the breath talk switch 11 is turned on. The detected reception level Vd (FIG. 7 (6)) during the reception period of the sample hold circuit 2
4b. This held value V' d (FIG. 7 (7)) is input to the comparison circuit 23 and the transmission control circuit 21 instead of the detected reception level Vd in the case of FIG.
Used to control transmission power P2.
上記モード切換信号■１は遅延回路２４ｃにも入力され
ており、ここで上記サンプルホールド回路２４ｂが作動
するに必要な時間Ｔｄモード切換信号■１を遅延した電
源切換信号■、（第７図（３））となって電源回路６に
入力され、その結果第７図（４）、 （５１ニ示すよう
に相互にＯＮ、ＯＦＦが対向する電圧Ｖｔと電圧Ｖｒを
得る。この電圧Ｖｔが送信回路３と送信制御回路２１に
入力され、電圧Ｖｒが受信回路４に入力される。The mode switching signal ■1 is also input to the delay circuit 24c, where the power supply switching signal ■, which is delayed from the Td mode switching signal ■1 by the time necessary for the sample and hold circuit 24b to operate (see FIG. 7), is input to the delay circuit 24c. 3)) and is input to the power supply circuit 6, and as a result, voltages Vt and Vr whose ON and OFF states are opposite to each other are obtained as shown in FIG. 3 is input to the transmission control circuit 21, and voltage Vr is input to the reception circuit 4.
尚、第２図に示した送信制御回路２１はこの単信方式の
携帯形無線機１にも適用できるのは勿論である。It goes without saying that the transmission control circuit 21 shown in FIG. 2 can also be applied to this simplex type portable radio device 1.
本願発明の実施例、特に、送信制御回路２１、保持制御
回路２４は図面に示した構成以外に種々の構成のものを
使用できることは勿論である。It goes without saying that the embodiments of the present invention, particularly the transmission control circuit 21 and the holding control circuit 24, may have various configurations other than those shown in the drawings.
以上説明したように、本発明によれば、基地局無線機と
無線通話を行う携帯型無線機の送信電力を受信電界強度
に応じて変化させることにより、基地局無線機の受信性
能を損なうことなく、携帯型無線機の消費電力を少なく
することができる。As explained above, according to the present invention, by changing the transmission power of a portable radio device that performs wireless communication with a base station radio device according to the received electric field strength, it is possible to impair the reception performance of the base station radio device. Therefore, the power consumption of the portable radio device can be reduced.
すなわち、電池の有効利用を図ることになり、寿命を延
ばすことができ、あるいは、電池を小型にすることがで
きる。In other words, the battery can be used more effectively, its lifespan can be extended, or the battery can be made smaller.
第１図はこの発明を複信方式の携帯型無線機に適用した
実施例を示すブロック図、第２図は送信制御回路の構成
を示すブロック図、第３図はこの発明の詳細な説明する
特性図、第４図はこの発明の詳細な説明する特性図、第
５図はこの発明を単信方式の携帯型無線機に適用した実
施例を示すブロック図、第６図は保持制御回路の構成を
示すブロック図、第７図は単信方式の場合の動作を説明
するタイミングチャート、第８図は従来の複信方式の携
帯型無線機を示すブロック図、第９図は従来の単信方式
の携帯型無線機を示すブロック図、第１０図は２台の無
線機の相対関係を示す概略図、第１１図は受信電界強度
と受信Ｓ／Ｎとの関係を示す特性図である。
図中、
３・・・送信回路、
４・・・受信回路、
２１・・・送信制御回路、
２３・・・比較回路、
２４・・・保持制御回路、
Ｖｓ・・・基準電圧、
Ｖｄ・・・検出受信レベル。
本発明の次Ｍｋｔえ明す３刀めの…１
第
図
Ａ多眼を叱柄Ｔ３入りの労櫨明
イ米５ｒｙ）猪ｆ万江、≧４．ククィミ、グｒトヤーＹ
第
図
多忙」象づ刈の１情１衾＼ΣＨ（＃りを弐シ望（す飼第
８図
■「
］ηの膚じ（ヂＪ少ｆｆ１（阜力（ぎ＜、＠←合９第９
図Fig. 1 is a block diagram showing an embodiment in which the present invention is applied to a duplex portable radio device, Fig. 2 is a block diagram showing the configuration of a transmission control circuit, and Fig. 3 is a detailed explanation of the invention. 4 is a characteristic diagram explaining the present invention in detail, FIG. 5 is a block diagram showing an embodiment in which the present invention is applied to a simplex type portable radio, and FIG. 6 is a diagram showing a holding control circuit. A block diagram showing the configuration, Fig. 7 is a timing chart explaining the operation in the case of simplex system, Fig. 8 is a block diagram showing a conventional duplex system portable radio, and Fig. 9 is a conventional simplex system portable radio. FIG. 10 is a schematic diagram showing the relative relationship between two radio devices, and FIG. 11 is a characteristic diagram showing the relationship between received field strength and received S/N. In the figure, 3... Transmission circuit, 4... Receiving circuit, 21... Transmission control circuit, 23... Comparison circuit, 24... Holding control circuit, Vs... Reference voltage, Vd...・Detected reception level. The next Mkt of the present invention is the third sword...1 Figure A: Multi-lensed sword with T3 handle, 5ry) Ino f Mane, ≧4. Kukumi, Gutoya Y
Figure 8: Busy'' Illustrated 1 emotion \ΣH 9th
figure
Claims (1)
式の携帯型無線機において、 前記受信回路（４）より検出される検出受信レベル（Ｖ
＿ｄ）と基準値（Ｖ＿ｓ）とを比較する比較回路（２３
）と、該比較回路（２３）の出力レベル（Ｖ＿ｃ）に応
じて送信回路（３）の送信電力（Ｐ＿２）を制御する送
信制御回路（２１）と よりなることを特徴とする携帯型無線機の送信電力制御
装置。 〔２〕送信回路（３）と受信回路（４）を備えた単信方
式の携帯型無線機において、 受信回路（４）より検出される検出受信レベル（Ｖ＿ｄ
）が基準値（Ｖ＿ｓ）とを比較する比較回路（２３）と
、送信期間にその直前の受信期間の上記検出受信レベル
（Ｖ＿ｄ）を保持する保持制御回路（２４）と、上記の
ように保持された検出受信レベル（Ｖ′＿ｄ）と、前記
比較回路（２３）の出力レベル（Ｖ＿ｃ）に応じて送信
回路（３）の送信電力（Ｐ＿２）を制御する送信制御回
路（２１）と を備えた携帯型無線機の送信電力制御装置。[Scope of Claims] [1] In a duplex type portable radio device comprising a transmitting circuit (3) and a receiving circuit (4), a detected reception level (V
__d) and the reference value (V_s).
), and a transmission control circuit (21) that controls the transmission power (P_2) of the transmission circuit (3) according to the output level (V_c) of the comparison circuit (23). transmission power control device. [2] In a simplex type portable radio equipped with a transmitting circuit (3) and a receiving circuit (4), the detected reception level (V_d) detected by the receiving circuit (4)
) is compared with the reference value (V_s), a holding control circuit (24) that holds the detected reception level (V_d) of the immediately preceding reception period during the transmission period, and a transmission control circuit (21) that controls the transmission power (P_2) of the transmission circuit (3) according to the detected reception level (V'_d) and the output level (V_c) of the comparison circuit (23). Transmission power control device for portable radio equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63303417A JPH02148920A (en) | 1988-11-29 | 1988-11-29 | Transmission power controller for portable radio equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63303417A JPH02148920A (en) | 1988-11-29 | 1988-11-29 | Transmission power controller for portable radio equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02148920A true JPH02148920A (en) | 1990-06-07 |
Family
ID=17920770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63303417A Pending JPH02148920A (en) | 1988-11-29 | 1988-11-29 | Transmission power controller for portable radio equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02148920A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5710981A (en) * | 1995-05-23 | 1998-01-20 | Ericsson Inc. | Portable radio power control device and method using incrementally degraded received signals |
| US7319884B2 (en) | 2003-12-02 | 2008-01-15 | Matsushita Electric Industrial Co., Ltd. | FM radio device and transmission power control method |
| JP2014204231A (en) * | 2013-04-03 | 2014-10-27 | 株式会社デンソー | Communication device |
-
1988
- 1988-11-29 JP JP63303417A patent/JPH02148920A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5710981A (en) * | 1995-05-23 | 1998-01-20 | Ericsson Inc. | Portable radio power control device and method using incrementally degraded received signals |
| US7319884B2 (en) | 2003-12-02 | 2008-01-15 | Matsushita Electric Industrial Co., Ltd. | FM radio device and transmission power control method |
| JP2014204231A (en) * | 2013-04-03 | 2014-10-27 | 株式会社デンソー | Communication device |
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