JP3043656B2 - Booster relay device - Google Patents
Booster relay deviceInfo
- Publication number
- JP3043656B2 JP3043656B2 JP9107388A JP10738897A JP3043656B2 JP 3043656 B2 JP3043656 B2 JP 3043656B2 JP 9107388 A JP9107388 A JP 9107388A JP 10738897 A JP10738897 A JP 10738897A JP 3043656 B2 JP3043656 B2 JP 3043656B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- unit
- output
- frequency
- signals
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Radio Relay Systems (AREA)
- Control Of Amplification And Gain Control (AREA)
- Amplifiers (AREA)
- Mobile Radio Communication Systems (AREA)
Description
【0001】[0001]
【発明の属する技術分野】本発明は無線中継用のブース
タ中継装置に関し、特に移動体通信システムに使用され
る多重化信号、例えば異なるキャリヤ周波数の複数のF
M信号を同時に増幅して中継するブースタ中継装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a booster repeater for radio relay, and more particularly to a multiplexed signal used in a mobile communication system, for example, a plurality of Fs having different carrier frequencies.
The present invention relates to a booster relay device for simultaneously amplifying and relaying M signals.
【0002】[0002]
【従来の技術】この種のブースタ中継装置は、ポケット
ベル、列車無線等の移動体通信のように無線周波数を利
用する無線通信分野において遠隔地に至るまで無線電波
の受信状態を良好に維持するため、受信アンテナで受信
した無線周波信号を増幅し、その受信した無線周波信号
と同一の周波数で送信アンテナから送信するものでいわ
ゆる無線中継用ブースターアンプである。2. Description of the Related Art A booster repeater of this type maintains a good reception condition of radio waves up to a remote place in a radio communication field using radio frequencies such as mobile communication such as a pager and a train radio. Therefore, a radio frequency signal received by the receiving antenna is amplified and transmitted from the transmitting antenna at the same frequency as the received radio frequency signal. This is a so-called radio relay booster amplifier.
【0003】この種のブースターアンプの一般的な回路
構成は受信アンテナと増幅器と送信アンテナとから構成
されており、受信アンテナで受信した受信信号を増幅器
で増幅した後、送信信号として送信アンテナから無線伝
送するものである。この無線中継用ブースターアンプに
おいては受信信号と送信信号との周波数は同一であり、
その中継利得Gは受信アンテナの利得をG1 、増幅器の
利得をG2 、送信アンテナの利得をG3 とする時、中継
利得G=G1 ×G2 ×G3 で表される。また、送信アン
テナと受信アンテナ間の伝搬損失をLとすると、L<G
となった時に発振現象を生起する問題がある。The general circuit configuration of this type of booster amplifier is composed of a receiving antenna, an amplifier, and a transmitting antenna. After a receiving signal received by the receiving antenna is amplified by the amplifier, the signal is transmitted from the transmitting antenna to the radio as a transmitting signal. To be transmitted. In this wireless relay booster amplifier, the frequency of the reception signal and the transmission signal is the same,
When the gain of the receiving antenna is G 1 , the gain of the amplifier is G 2 , and the gain of the transmitting antenna is G 3 , the relay gain G is represented by G = G 1 × G 2 × G 3 . Also, assuming that the propagation loss between the transmitting antenna and the receiving antenna is L, L <G
Then, there is a problem that an oscillation phenomenon occurs.
【0004】また、受信アンテナからの受信レベルは移
動体通信では変動するのでこの変動に対しアンテナ送信
レベルを安定化しなければならないという問題がありこ
れら問題を改善するものとして、例えば特開平2−90
711号公報に記載された従来例がある。[0004] Also, since the reception level from the reception antenna fluctuates in mobile communication, there is a problem that the antenna transmission level must be stabilized against this fluctuation.
There is a conventional example described in Japanese Patent Publication No. 711.
【0005】図3はこの従来例を示すブロック図であ
る。図3において、受信アンテナ40で受信された信号
は利得制御部を構成する可変減衰器41、42を介して
増幅器43の入力端子に導入され、当該増幅器43で増
幅された後、分波器44を介して送信アンテナ55に導
入される。この場合、分波器44において本線信号とし
ての増幅器43の出力信号から一部の信号が分岐され、
当該分岐された信号は検波器45を介し出力信号Vdet
としてAGC(Automatic GainCont
rol)ループ制御回路46および発振停止回路47を
構成する比較器49、54の負入力端子に導入される。FIG. 3 is a block diagram showing this conventional example. In FIG. 3, a signal received by a receiving antenna 40 is introduced into an input terminal of an amplifier 43 via variable attenuators 41 and 42 constituting a gain control unit. Through the transmission antenna 55. In this case, a partial signal is branched from the output signal of the amplifier 43 as the main signal in the demultiplexer 44,
The branched signal is output via a detector 45 to an output signal V det.
AGC (Automatic GainCont)
(roll) It is introduced to the negative input terminals of the comparators 49 and 54 constituting the loop control circuit 46 and the oscillation stop circuit 47.
【0006】比較器49、54の正入力端子には、夫
々、基準電圧発生器50、53からの基準電圧VR1、V
R2が導入されており、検波器45の出力信号Vdet と基
準電圧VR1、VR2との電圧差に応じて比較器49、54
の出力端子に、夫々、アナログ信号としての電圧信号V
C1、パルス信号としての電圧信号VC2が発生する。The positive input terminals of the comparators 49 and 54 have reference voltages V R1 and V R1 from reference voltage generators 50 and 53, respectively.
R2 is introduced, and comparators 49 and 54 are provided according to the voltage difference between the output signal V det of the detector 45 and the reference voltages V R1 and V R2.
Output terminals are respectively provided with a voltage signal V as an analog signal.
C1 and a voltage signal V C2 as a pulse signal are generated.
【0007】比較器49の出力信号VC1は減衰量制御器
48によって減衰量制御信号VA1に変換された後、可変
減衰器42の減衰量制御端子AT1に導入される。一
方、比較器54の出力信号VC2に基づき発振判定部52
によって当該無線中継用ブースターアンプが発振してい
るか否かが判定され、発振判定部52からその判定結果
に基づき判定信号VC2が減衰量制御器51に導入され
る。減衰量制御器51は判定信号VD2に基づき減衰量制
御信号VA2を発生し、可変減衰器41の減衰量制御端子
AT2に供給する。可変減衰器41は減衰量制御信号V
A2に応じてその減衰量が制御される。[0007] The output signal V C1 of the comparator 49 is converted into an attenuation control signal V A1 by the attenuation controller 48 and then introduced into the attenuation control terminal AT 1 of the variable attenuator 42. On the other hand, based on the output signal V C2 of the comparator 54, the oscillation determination unit 52
It is determined whether or not the wireless relay booster amplifier is oscillating, and a determination signal V C2 is introduced from the oscillation determining unit 52 to the attenuation controller 51 based on the determination result. Attenuation controller 51 generates the attenuation control signal V A2 based on the judgment signal V D2, and supplies the attenuation control terminal AT2 of the variable attenuator 41. The variable attenuator 41 outputs the attenuation control signal V
The amount of attenuation is controlled according to A2 .
【0008】本発明に直接関係するAGCループ制御回
路46は、検出器45の出力信号Vdet を入力し、これ
と基準電圧VR1とを比較器49で比較しその差電圧を出
力信号VC1として取出し、減衰量制御器48を介して可
変減衰器42の減衰量を可変し、入力信号のレベル変動
に対し出力信号のレベルを所定値に安定化している。The AGC loop control circuit 46, which is directly related to the present invention, receives the output signal V det of the detector 45, compares it with a reference voltage V R1 by a comparator 49, and compares the difference voltage with the output signal V C1. Then, the attenuation of the variable attenuator 42 is varied via the attenuation controller 48 to stabilize the output signal level to a predetermined value with respect to the input signal level fluctuation.
【0009】[0009]
【発明が解決しようとする課題】このように従来例にお
いては、入力レベルの変動に対し出力レベルを安定化す
るために出力レベルを検出しAGC制御で出力レベルを
安定化しているので、入力信号が周波数の異なる複数の
信号、即ち周波数多重信号であると信号数の増減によっ
て1信号当たりの出力レベルが変動するという問題があ
る。即ちこの種の多重信号はその時の通信量などで信号
数が増減した場合に、信号数トータルの出力レベルを検
出し安定化しているので1信号当たりの出力レベルは変
動してしまうという問題である。As described above, in the conventional example, the output level is detected in order to stabilize the output level with respect to the fluctuation of the input level, and the output level is stabilized by AGC control. Is a plurality of signals having different frequencies, that is, a frequency multiplexed signal, there is a problem that the output level per signal fluctuates due to the increase or decrease in the number of signals. That is, in the case of this kind of multiplexed signal, when the number of signals increases or decreases due to the amount of communication at that time, the output level of the total number of signals is detected and stabilized, so that the output level per signal fluctuates. .
【0010】また、この増幅器を用いて1信号当たりの
出力レベルを安定化しようとすると次のような問題が発
生する。一般に増幅器の飽和電力は最大出力レベルに対
し設定されるので、最多信号数の時のトータル出力レベ
ルに対し飽和電力は設定される。しかし1信号当たりの
出力レベルを安定化するとトータルの出力レベルは信号
数により変動し、信号数が減少した場合、飽和電力ある
いは消費電力が一定であるに対し出力レベルは低下する
ので電力効率が低下してしまうという問題がある。一般
にこの種の増幅器は相互変調歪の発生を抑えるために直
線性が良好なA級増幅を行っており、電力効率が悪く消
費電力が多い。反面この種の中継装置では局舎電源事情
から極力省電力化が要望されている。Further, if the output level per signal is to be stabilized using this amplifier, the following problem occurs. Generally, the saturation power of the amplifier is set for the maximum output level, so the saturation power is set for the total output level when the number of signals is the maximum. However, when the output level per signal is stabilized, the total output level fluctuates according to the number of signals, and when the number of signals decreases, the output level decreases while the saturation power or power consumption is constant, resulting in lower power efficiency. There is a problem of doing it. Generally, this type of amplifier performs class A amplification with good linearity in order to suppress the occurrence of intermodulation distortion, and has low power efficiency and large power consumption. On the other hand, in this type of relay device, power saving is demanded as much as possible due to the situation of the power supply in the office building.
【0011】[0011]
【課題を解決するための手段】本発明のブースタ中継装
置は、受信アンテナで受信した周波数の異なる無線周波
信号が複数多重化された受信信号を前記無線周波信号の
数分だけ分岐する分岐部と、前記分岐部の分岐出力信号
をそれぞれ前記無線周波信号に対応する局部発振信号で
それぞれ変調し同一の中間周波数に変換する複数の第1
の周波数変換部と、前記第1の周波数変換部の出力信号
をそれぞれ入力し不要波を除去して出力する帯域制限用
の複数の帯域濾波器と、前記帯域濾波器の出力信号を対
応する前記局部発振信号でそれぞれ変調し前記無線周波
信号の周波数に変換する複数の第2の周波数変換部と、
各前記第2の周波数変換部の出力信号を合成する合成部
と、前記合成部の出力信号を増幅し送信アンテナに出力
する飽和電力可変部を有する共通増幅器と、各前記第2
の周波数変換部の出力信号を監視し受信した前記無線周
波信号の信号数を検出する信号数検出部と、前記信号数
検出部の出力信号で前記共通増幅器の飽和電力可変部を
制御し信号数に対応した最適の飽和電力を設定するため
の制御信号を出力する飽和電力制御部とを備えている。A booster repeater according to the present invention comprises: a branching unit for branching a reception signal, in which a plurality of radio frequency signals having different frequencies received by a reception antenna are multiplexed, by the number of the radio frequency signals; A plurality of first output units each of which modulates a branch output signal of the branch unit with a local oscillation signal corresponding to the radio frequency signal and converts the signal to the same intermediate frequency.
A frequency conversion unit, a plurality of band-pass filters for inputting output signals of the first frequency conversion unit, removing unnecessary waves, and outputting the signals, and an output signal corresponding to the band-pass filter. A plurality of second frequency conversion units each of which is modulated by a local oscillation signal and converted into a frequency of the radio frequency signal;
A common amplifier having a synthesizing unit for synthesizing an output signal of each of the second frequency converting units, a saturation power variable unit for amplifying an output signal of the synthesizing unit and outputting the signal to a transmission antenna;
A signal number detection unit that monitors the output signal of the frequency conversion unit and detects the number of the received radio frequency signals, and controls the saturation power variable unit of the common amplifier with the output signal of the signal number detection unit to control the number of signals. And a saturation power control unit that outputs a control signal for setting an optimum saturation power corresponding to the above.
【0012】また、各前記第2の周波数変換部の出力側
にそれぞれ出力信号の振幅を制限するための複数の振幅
制限器を挿入しても良い。Further, a plurality of amplitude limiters for limiting the amplitude of the output signal may be inserted at the output side of each of the second frequency converters.
【0013】あるいは、受信アンテナで受信した異なる
周波数の複数の無線周波信号が多重化された受信信号を
増幅し送信アンテナに出力する飽和電力可変部を有する
共通増幅器と、前記受信信号を前記FM信号の数に分岐
する分岐部と、前記分岐部の分岐出力信号を対応する周
波数の局部発振信号でそれぞれ変調し同一の中間周波数
に変換する複数の周波数変換部と、前記周波数変換部の
出力信号からそれぞれ中間周波数を選択する複数の帯域
濾波器と、各前記帯域濾波器の出力信号を監視し受信し
た前記FM信号の信号数を検出する信号数検出部と、前
記信号数検出部の出力信号で前記共通増幅器の飽和電力
可変部を制御し信号数に対応した最適の飽和電力を設定
するための制御信号を出力する飽和電力制御部とを備え
ることでも良い。[0013] Alternatively, a common amplifier having a saturation power variable section for amplifying a reception signal in which a plurality of radio frequency signals of different frequencies received by a reception antenna are multiplexed and outputting the amplified signal to a transmission antenna; A plurality of branching units, a plurality of frequency conversion units that respectively modulate a branch output signal of the branching unit with a local oscillation signal of a corresponding frequency and convert the same into the same intermediate frequency, and output signals of the frequency conversion unit. A plurality of bandpass filters each for selecting an intermediate frequency, a signal number detection unit for monitoring the output signal of each bandpass filter and detecting the number of received FM signals, and an output signal of the signal number detection unit. The common power amplifier may further include a saturation power control unit that controls a saturation power variable unit and outputs a control signal for setting an optimum saturation power corresponding to the number of signals.
【0014】また、前記共通増幅器の出力信号のレベル
を検出する出力レベル検出部と、前記出力レベル検出部
の出力信号と前記信号数検出部の出力信号とから前記共
通増幅器の出力レベルが信号数に対応した最適レベルに
なるように制御する制御信号を前記共通増幅器へ出力す
る利得制御部と、前記共通増幅器は前記制御信号により
利得を可変する利得可変部を備えることでも良い。An output level detector for detecting the level of the output signal of the common amplifier, and the output level of the common amplifier is determined by the output signal of the output level detector and the output signal of the signal number detector. The common amplifier may include a gain control unit that outputs a control signal for controlling the gain to an optimum level corresponding to the control signal to the common amplifier, and the gain variable unit that changes a gain according to the control signal.
【0015】例えば、前記共通増幅器は出力段増幅回路
がA級増幅で前記飽和電力可変部は前記制御信号により
前記出力段増幅回路の動作点を可変するようにしても良
い。For example, in the common amplifier, the output stage amplifier circuit may be a class A amplifier, and the saturation power varying unit may vary the operating point of the output stage amplifier circuit according to the control signal.
【0016】[0016]
【発明の実施の形態】次に本発明の実施の形態について
図面を参照して説明する。Embodiments of the present invention will now be described with reference to the drawings.
【0017】図1は本発明の実施の形態例を示すブロッ
ク図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
【0018】本発明のブースタ中継装置は受信アンテナ
より異なるキャリヤ周波数の8つのFM信号波を多重化
した受信信号を入力し、各信号毎にレベルを均等化し所
定の出力レベルに増幅して送信アンテナに出力するもの
で、信号数により増幅器の飽和電力を可変するものであ
る。The booster repeater of the present invention inputs a received signal obtained by multiplexing eight FM signal waves having different carrier frequencies from the receiving antenna, equalizes the level of each signal, amplifies the level to a predetermined output level, and transmits the signal to the transmitting antenna. The saturation power of the amplifier is varied according to the number of signals.
【0019】図1において、本ブースタ中継装置は、受
信アンテナで受信した受信信号をFM信号の数分だけ8
分岐する分岐部1と、分岐部1の分岐出力信号をそれぞ
れFM信号に対応する局部発振器6の出力信号でそれぞ
れ変調し同一の中間周波数に変換する8個の周波数変換
部2a〜2hと、周波数変換部2の出力信号をそれぞれ
入力し不要波を除去して出力する帯域制限用の8個の帯
域通過濾波器3a〜3hと、帯域通過濾波器3の出力信
号を対応する局部発振器6の出力信号でそれぞれ変調し
元のFM信号の周波数に変換する8個の周波数変換部4
a〜4hと、各周波数変換部5の出力信号のレベルを均
等化する振幅制限器5a〜5hと、各振幅制限器5の出
力信号を合成する合成部8と、合成部8の出力信号を増
幅し送信アンテナに出力する飽和電力可変部を有する共
通増幅器9と、各周波数変換部4の出力信号を監視し受
信したFM信号の信号数を検出する信号数検出部10
と、信号数検出部10の出力信号で共通増幅器9の飽和
電力可変部91を制御し信号数に対応した最適の飽和電
力を設定するための飽和電力制御部11とから構成され
ている。In FIG. 1, the present booster repeater converts a received signal received by a receiving antenna into an 8
A branching unit 1 for branching, eight frequency converting units 2a to 2h for modulating respective branch output signals of the branching unit 1 with output signals of a local oscillator 6 corresponding to FM signals and converting the same to the same intermediate frequency, Eight band-pass filters 3a to 3h for inputting output signals of the converter 2 and removing unnecessary waves and outputting the signals, and output signals of the local oscillator 6 corresponding to the output signals of the band-pass filters 3 Eight frequency converters 4 for modulating each of the signals and converting them to the frequency of the original FM signal
a to 4h, amplitude limiters 5a to 5h for equalizing the level of the output signal of each frequency converter 5, a synthesizing unit 8 for synthesizing the output signals of each amplitude limiter 5, and an output signal of the synthesizing unit 8. A common amplifier 9 having a saturated power variable section for amplifying and outputting the signal to the transmitting antenna; and a signal number detecting section 10 for monitoring the output signal of each frequency converting section 4 and detecting the number of received FM signals.
And a saturation power control unit 11 for controlling the saturation power variable unit 91 of the common amplifier 9 with the output signal of the signal number detection unit 10 and setting an optimum saturation power corresponding to the number of signals.
【0020】次に動作について説明する。受信アンテナ
からの受信信号は分岐部1で8分岐され、それぞれ周波
数変換部2a〜2hに入力され各FM信号の周波数に対
応する局部発振器6a〜6hの出力信号で変調され、無
線周波帯の各FM信号は低周波帯の同一中間周波数帯に
変換される。次に帯域通過濾波器3を通過して帯域制限
を受け、帯域外の不要波を除去してC/Nを改善する。
中間周波帯の各FM信号は、次に周波数変換部4で元の
無線周波帯に変換され、次の振幅制限器5で各FM信号
はレベルが均等化され、合成部8で多重化される。帯域
制限によりC/Nを改善され、かつ振幅制限でレベルが
均等化された各FM信号は共通増幅器9で所定のレベル
に同時に増幅され送信アンテナに出力される。Next, the operation will be described. The reception signal from the reception antenna is divided into eight by the branching unit 1, and is input to the frequency conversion units 2a to 2h, respectively, and modulated by the output signals of the local oscillators 6a to 6h corresponding to the frequency of each FM signal. The FM signal is converted to the same intermediate frequency band in the low frequency band. Next, the signal passes through the band-pass filter 3 and is band-limited, and unnecessary waves outside the band are removed to improve C / N.
Each FM signal in the intermediate frequency band is then converted to the original radio frequency band by the frequency converter 4, the level of each FM signal is equalized by the next amplitude limiter 5, and multiplexed by the synthesizer 8. . Each FM signal whose C / N is improved by the band limitation and whose level is equalized by the amplitude limitation is simultaneously amplified to a predetermined level by the common amplifier 9 and output to the transmitting antenna.
【0021】一方、各振幅制限器5の出力信号は信号数
検出回路10でレベル監視されており、ここでレベル検
出により入力された信号数を検出している。信号数を示
す検出信号は飽和電力制御部11に入力され、ここで信
号数に応じて共通増幅部9の飽和電力を設定するための
制御信号を生成し、共通増幅器9の飽和電力可変部91
へ出力している。飽和電力可変部91はこの制御信号に
よりA級増幅回路を構成する出力段のバイアスなどを変
えて飽和電力を設定するようになっている。On the other hand, the level of the output signal of each amplitude limiter 5 is monitored by a signal number detection circuit 10, where the number of input signals is detected by level detection. The detection signal indicating the number of signals is input to the saturation power control unit 11, where a control signal for setting the saturation power of the common amplification unit 9 is generated according to the number of signals, and the saturation power variable unit 91 of the common amplifier 9 is generated.
Output to The saturation power variable section 91 sets the saturation power by changing the bias and the like of the output stage constituting the class A amplifier circuit according to the control signal.
【0022】次に他の実施の形態例を図2を参照して説
明する。図2は他の実施の形態例を示すブロック図であ
る。図2において、本ブースタ中継装置は、受信アンテ
ナで受信した受信信号を増幅し送信アンテナに出力する
飽和電力可変部271と利得可変部272とを有する共
通増幅器27と、受信信号を共通増幅部24へ低損失で
分岐すると同時にFM信号の数に分岐する分岐部21
と、分岐部21の分岐出力信号をそれぞれFM信号に対
応する周波数の局部発振器27a〜27hの出力信号で
それぞれ変調し同一の中間周波数に変換する8個の周波
数変換部23a〜23hと、周波数変換部23の出力信
号からそれぞれ中間周波数を選択する8個の帯域通過濾
波器24a〜24hと、各帯域濾波器24の出力信号を
監視し受信したFM信号の信号数を検出する信号数検出
部25と、信号数検出部25の出力信号で共通増幅器2
2の飽和電力可変部221を制御し信号数に対応した最
適の飽和電力2を設定するための飽和電力制御部26
と、共通増幅器22の出力信号のレベルを検出する出力
レベル検出部28と、出力レベル検出部28の出力信号
と信号数検出部25の出力信号とから共通増幅器22の
出力レベルが信号数に対応した最適レベルになるように
制御する制御信号を共通増幅器22の利得可変部22へ
出力する利得制御部29とから構成されている。Next, another embodiment will be described with reference to FIG. FIG. 2 is a block diagram showing another embodiment. 2, the booster repeater includes a common amplifier 27 having a saturation power variable section 271 and a gain variable section 272 for amplifying a received signal received by a receiving antenna and outputting the amplified signal to the transmitting antenna, and a common amplifier 24 for amplifying the received signal. Branching unit 21 that branches to the number of FM signals at the same time with low loss
Eight frequency converters 23a to 23h for respectively modulating the branch output signals of the branch unit 21 with the output signals of the local oscillators 27a to 27h having the frequencies corresponding to the FM signals and converting the same to the same intermediate frequency; Eight band-pass filters 24a to 24h each for selecting an intermediate frequency from the output signal of the unit 23, and a signal number detecting unit 25 for monitoring the output signal of each band filter 24 and detecting the number of received FM signals. And the common amplifier 2 based on the output signal of the signal number detector 25.
Saturation power control unit 26 for controlling the saturation power variable unit 221 and setting the optimum saturation power 2 corresponding to the number of signals
And an output level detector 28 for detecting the level of the output signal of the common amplifier 22, and the output level of the common amplifier 22 corresponds to the number of signals from the output signal of the output level detector 28 and the output signal of the signal number detector 25. And a gain control section 29 for outputting a control signal for controlling the gain to the optimum level to the gain variable section 22 of the common amplifier 22.
【0023】次に動作について説明する。受信アンテナ
からの受信信号は分岐部21で共通増幅部22方向と、
8分岐方向とに分岐されるが、共通増幅器22方向の分
岐は分岐損が小さく主信号への影響を軽減している。8
分岐された各受信信号は周波変換部23で局部発振器2
7の出力信号で変調され低周波で同一の中間周波数に変
換される。中間周波数に変換された各FM信号は帯域通
過濾波器24で不要波が除去されそれぞれ信号数検出部
25へ入力される。この帯域濾波器24はレベル検出が
できる簡単なもので良い。信号数検出部25でレベル検
出により各FM信号の入力が確認され受信したFM信号
の数が検出される。信号数を示す検出信号は飽和電力制
御部26へ入力され、ここで制御信号に変換され共通増
幅器の飽和電力可変部へ出力される。この制御信号によ
り図1で説明したように共通増幅器22の飽和電力が設
定される。Next, the operation will be described. The reception signal from the reception antenna is directed to the common amplification unit 22 by the branch unit 21,
The branching is performed in eight directions. The branching in the direction of the common amplifier 22 has a small branching loss and reduces the influence on the main signal. 8
Each of the branched received signals is converted by the frequency converter 23 into the local oscillator 2.
7 and converted to the same intermediate frequency at a low frequency. Each FM signal converted to the intermediate frequency is subjected to a band-pass filter 24 to remove unnecessary waves, and is input to a signal number detection unit 25, respectively. The bandpass filter 24 may be a simple one capable of level detection. The signal number detector 25 confirms the input of each FM signal by level detection and detects the number of received FM signals. The detection signal indicating the number of signals is input to the saturation power control unit 26, where it is converted into a control signal and output to the saturation power variable unit of the common amplifier. This control signal sets the saturation power of the common amplifier 22 as described with reference to FIG.
【0024】一方、共通増幅部22の出力信号の一部は
出力レベル検出部28へ入力されており、ここで出力レ
ベル値の検出を行い、出力レベル値を示す検出信号を利
得制御部29へ出力している。利得制御部28はこの出
力レベル検出部28の検出信号と信号数検出部25の検
出信号とを入力し、信号数に対応した共通増幅部22の
出力レベルを演算し、この出力レベルが一定となるよう
に制御する利得制御信号を共通増幅部22の利得可変部
222へ出力する。利得可変部222はこの利得制御信
号により利得を信号数の増減に対しては変化させず、入
力レベルの変動に対してのみ調整する。On the other hand, a part of the output signal of the common amplifying unit 22 is input to the output level detecting unit 28, where the output level value is detected, and the detection signal indicating the output level value is sent to the gain control unit 29. Output. The gain control unit 28 receives the detection signal of the output level detection unit 28 and the detection signal of the signal number detection unit 25, calculates the output level of the common amplification unit 22 corresponding to the number of signals, and determines that the output level is constant. The gain control signal for controlling the gain is output to the gain variable section 222 of the common amplifying section 22. The gain variable section 222 does not change the gain with the gain control signal with respect to the increase or decrease of the number of signals, but adjusts only the change of the input level.
【0025】即ち、以上説明したように共通増幅器22
は、入力したFM信号数に対応し最適の飽和電力と出力
レベルとが自動的に設定されるようになる。That is, as described above, the common amplifier 22
The optimum saturation power and output level are automatically set according to the number of input FM signals.
【0026】尚、図2のブースタ中継装置は図1のもの
に比べて、出力レベルの安定化において各FM信号の入
力レベルにばらつきがあった場合にこれを均等化できな
い欠点はあるが、信号数検出部分が簡略化できるので低
コスト化また小型化できる特徴がある。The booster repeater shown in FIG. 2 has a drawback that when the input level of each FM signal varies in stabilizing the output level, it cannot be equalized as compared with the booster relay apparatus shown in FIG. Since the number detection part can be simplified, there is a feature that the cost can be reduced and the size can be reduced.
【0027】また、図1および図2に示したブースタ中
継装置に図3で説明した発振停止回路を付加しても良
い。Further, the oscillation stop circuit described with reference to FIG. 3 may be added to the booster repeater shown in FIGS.
【0028】[0028]
【発明の効果】以上説明したように本発明のブースタ中
継装置は、各無線周波信号毎の出力レベルを安定化しか
つ信号数に対応した飽和電力の設定を自動的に行ってい
るので、入力信号数により1信号当たりの出力レベルが
変動することがなく、また飽和電力を信号数に対応して
設定しているので信号数が減少した場合、消費電力を減
少させ電力効率が悪化しないという効果がある。特に図
1で示した実施の形態例では各信号毎に帯域制限および
振幅制御を行っているので、電力効率の向上と共にC/
Nの改善と信号毎のレベルの均一化が得られる効果があ
る。As described above, the booster repeater of the present invention stabilizes the output level of each radio frequency signal and automatically sets the saturation power corresponding to the number of signals. The output level per signal does not fluctuate according to the number, and the saturation power is set in accordance with the number of signals. Therefore, when the number of signals decreases, the power consumption is reduced and the power efficiency is not deteriorated. is there. In particular, in the embodiment shown in FIG. 1, since the band limitation and the amplitude control are performed for each signal, the power efficiency is improved and the C / C ratio is improved.
There is an effect that N can be improved and the level of each signal can be made uniform.
【図1】本発明の実施の形態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】本発明の他の実施の形態例を示すブロック図で
ある。FIG. 2 is a block diagram showing another embodiment of the present invention.
【図3】従来例を示すブロック図である。FIG. 3 is a block diagram showing a conventional example.
1,21 分岐部 2a〜2h,4a〜4h,23a〜23h 周波数変
換部 3a〜3h 帯域通過濾波器 5a〜5h 振幅制限器 8 合成部 9,22 共通増幅器 6a〜6h,27a〜27b 局部発振器 10,25 信号数検出部 11,26 飽和電力制御部 28 出力レベル検出部 29 利得制御部1, 21 branch unit 2a to 2h, 4a to 4h, 23a to 23h frequency conversion unit 3a to 3h band-pass filter 5a to 5h amplitude limiter 8 synthesis unit 9, 22, common amplifier 6a to 6h, 27a to 27b local oscillator 10 , 25 signal number detection section 11, 26 saturation power control section 28 output level detection section 29 gain control section
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7,DB名) H03G 3/20 - 3/34 H03F 1/02 H04B 7/15 H04B 7/26 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. 7 , DB name) H03G 3/20-3/34 H03F 1/02 H04B 7/15 H04B 7/26
Claims (5)
無線周波信号が複数多重化された受信信号を前記無線周
波信号の数分に分岐する分岐部と、前記分岐部の分岐出
力信号をそれぞれ前記無線周波信号に対応する局部発振
信号でそれぞれ変調し同一の中間周波数に変換する複数
の第1の周波数変換部と、前記第1の周波数変換部の出
力信号をそれぞれ入力し不要波を除去して出力する帯域
制限用の複数の帯域濾波器と、前記帯域濾波器の出力信
号を対応する前記局部発振信号でそれぞれ変調し前記無
線周波信号の周波数に変換する複数の第2の周波数変換
部と、各前記第2の周波数変換部の出力信号を合成する
合成部と、前記合成部の出力信号を増幅し送信アンテナ
に出力する飽和電力可変部を有する共通増幅器と、各前
記第2の周波数変換部の出力信号を監視し受信した前記
無線周波信号の信号数を検出する信号数検出部と、前記
信号数検出部の出力信号で前記共通増幅器の飽和電力可
変部を制御し信号数に対応した最適の飽和電力を設定す
るための制御信号を出力する飽和電力制御部とを備える
ことを特徴とするブースタ中継装置。1. A branching unit for branching a reception signal in which a plurality of radio frequency signals having different frequencies received by a reception antenna are multiplexed into a plurality of radio frequency signals, and a branch output signal of the branching unit being transmitted to the radio unit. A plurality of first frequency converters each of which is modulated by a local oscillation signal corresponding to a frequency signal and converted into the same intermediate frequency; and an output signal of the first frequency converter is input, and unnecessary waves are removed and output. A plurality of bandpass filters for band limiting, and a plurality of second frequency conversion units for respectively modulating the output signal of the bandpass filter with the corresponding local oscillation signal and converting it to the frequency of the radio frequency signal, A common amplifier having a synthesizing unit for synthesizing an output signal of the second frequency conversion unit, a saturation power variable unit for amplifying an output signal of the synthesizing unit and outputting the signal to a transmission antenna; A signal number detection unit that monitors the output signal of the unit and detects the number of the received radio frequency signals, and controls the saturation power variable unit of the common amplifier with the output signal of the signal number detection unit to correspond to the number of signals. A booster relay device comprising: a saturation power control unit that outputs a control signal for setting an optimum saturation power.
れぞれ出力信号の振幅を制限するための複数の振幅制限
器を挿入することを特徴とする請求項1記載のブースタ
中継装置。2. The booster repeater according to claim 1, wherein a plurality of amplitude limiters for limiting the amplitude of the output signal are inserted on the output side of each of said second frequency converters.
複数の無線周波信号が多重化された受信信号を増幅し送
信アンテナに出力する飽和電力可変部を有する共通増幅
器と、前記受信信号を前記無線周波信号の数に分岐する
分岐部と、前記分岐部の分岐出力信号を対応する周波数
の局部発振信号でそれぞれ変調し同一の中間周波数に変
換する複数の周波数変換部と、前記周波数変換部の出力
信号からそれぞれ中間周波数を選択する複数の帯域濾波
器と、各前記帯域濾波器の出力信号を監視し受信した前
記無線周波信号の信号数を検出する信号数検出部と、前
記信号数検出部の出力信号で前記共通増幅器の飽和電力
可変部を制御し信号数に対応した最適の飽和電力を設定
するための制御信号を出力する飽和電力制御部とを備え
ることを特徴とするブースタ中継装置。3. A common amplifier having a variable saturation power section for amplifying a reception signal in which a plurality of radio frequency signals of different frequencies received by a reception antenna are multiplexed and outputting the amplified signal to a transmission antenna, A branch unit that branches into a number of signals, a plurality of frequency conversion units that respectively modulate a branch output signal of the branch unit with a local oscillation signal of a corresponding frequency and convert the same to the same intermediate frequency, and an output signal of the frequency conversion unit A plurality of bandpass filters for selecting an intermediate frequency from each, a signal number detection unit for monitoring the output signal of each of the bandpass filters and detecting the number of received radio frequency signals, and an output of the signal number detection unit A saturation power control unit that controls a saturation power variable unit of the common amplifier with a signal and outputs a control signal for setting an optimum saturation power corresponding to the number of signals. Booster relay device.
出する出力レベル検出部と、前記出力レベル検出部の出
力信号と前記信号数検出部の出力信号とから前記共通増
幅器の出力レベルが信号数に対応した最適レベルになる
ように制御する制御信号を前記共通増幅器へ出力する利
得制御部と、前記共通増幅器は前記制御信号により利得
を可変する利得可変部を備えることを特徴とする請求項
1あるいは3記載のブースタ中継装置。4. An output level detector for detecting a level of an output signal of the common amplifier, and an output level of the common amplifier is determined based on an output signal of the output level detector and an output signal of the signal number detector. 2. A gain control unit for outputting a control signal for controlling to an optimum level corresponding to the control signal to the common amplifier, and the common amplifier includes a gain variable unit for changing a gain by the control signal. Alternatively, the booster relay device according to 3.
増幅で前記飽和電力可変部は前記制御信号により前記出
力段増幅回路の動作点を可変することを特徴とする請求
項1,2,3あるいは4記載のブースタ中継装置。5. The common amplifier according to claim 1, wherein the output stage amplifying circuit is a class A amplifier, and the saturation power varying section varies an operating point of the output stage amplifying circuit by the control signal. 5. The booster relay device according to 3 or 4.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9107388A JP3043656B2 (en) | 1997-04-24 | 1997-04-24 | Booster relay device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9107388A JP3043656B2 (en) | 1997-04-24 | 1997-04-24 | Booster relay device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10303667A JPH10303667A (en) | 1998-11-13 |
JP3043656B2 true JP3043656B2 (en) | 2000-05-22 |
Family
ID=14457873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9107388A Expired - Fee Related JP3043656B2 (en) | 1997-04-24 | 1997-04-24 | Booster relay device |
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JP (1) | JP3043656B2 (en) |
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JP2007180597A (en) * | 2004-09-01 | 2007-07-12 | Nokia Corp | Relay device and relay method |
JP4838163B2 (en) * | 2007-02-07 | 2011-12-14 | マスプロ電工株式会社 | Television broadcast retransmission system and transmission apparatus |
JP5052325B2 (en) * | 2007-12-25 | 2012-10-17 | ホーチキ株式会社 | Relay broadcast station equipment |
JP2014165871A (en) * | 2013-02-27 | 2014-09-08 | Maspro Denkoh Corp | Television broadcast retransmission system |
-
1997
- 1997-04-24 JP JP9107388A patent/JP3043656B2/en not_active Expired - Fee Related
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JPH10303667A (en) | 1998-11-13 |
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