JPS6366095B2 - - Google Patents

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Publication number
JPS6366095B2
JPS6366095B2 JP2395483A JP2395483A JPS6366095B2 JP S6366095 B2 JPS6366095 B2 JP S6366095B2 JP 2395483 A JP2395483 A JP 2395483A JP 2395483 A JP2395483 A JP 2395483A JP S6366095 B2 JPS6366095 B2 JP S6366095B2
Authority
JP
Japan
Prior art keywords
frequency
frequencies
oscillator
intermediate frequency
local
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
Application number
JP2395483A
Other languages
Japanese (ja)
Other versions
JPS59149434A (en
Inventor
Kenichi Kunito
Masanobu Yada
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
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 Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP2395483A priority Critical patent/JPS59149434A/en
Publication of JPS59149434A publication Critical patent/JPS59149434A/en
Publication of JPS6366095B2 publication Critical patent/JPS6366095B2/ja
Granted legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/204Multiple access
    • H04B7/208Frequency-division multiple access [FDMA]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Description

【発明の詳細な説明】 本発明はデイジタル衛星通信方式に用いられる
中継装置に関するものであり、特に複数の搬送波
のパースト信号を切換再編し中継増幅するマルチ
ビーム衛星通信システムに有効な中継装置に関す
るものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a relay device used in a digital satellite communication system, and particularly to a relay device effective in a multi-beam satellite communication system that switches, rearranges, and relays and amplifies burst signals of multiple carrier waves. It is.

従来、衛星通信システムで最も多く用いられて
いる通信方式はFDM−FM−FDMA方式であつ
た。しかし、システムに参加する地球局数の増加
や通信需要の増大に対処するため、さらに高能
率、大容量でかつトラフイツクの変動に柔軟に追
従出来るデイジタル衛星通信方式の導入が検討さ
れている。その1つであるマルチビーム衛星と
TDMA技術を組み合せ、衛星内部にダイナミツ
ク・スウツチを搭載し、TDMAフレームに同期
して高速でビームの接続を切換えSS/TDMAと
呼ばれる方式が実用化されている。
Conventionally, the communication method most commonly used in satellite communication systems has been the FDM-FM-FDMA method. However, in order to cope with the increase in the number of earth stations participating in the system and the increase in communication demand, consideration is being given to introducing a digital satellite communication system that has even higher efficiency, larger capacity, and can flexibly follow traffic fluctuations. One of them is a multi-beam satellite.
A system called SS/TDMA has been put into practical use by combining TDMA technology and installing a dynamic switch inside the satellite, which switches beam connections at high speed in synchronization with the TDMA frame.

近年、更に通信需要の増大に対処する為、より
周波数の高い準ミリ波帯の周波数として使用する
マルチビーム衛星搭載用中継器の使用が検討され
ている。第1図は準ミリ波帯の搬送波を用いる
SS/TDMA方式の中継器の構成例を示してい
る。図において1〜4は受信ビーム素子であり、
同一受信ビーム内で送信局側からの送信周波数が
複合しない様に12…nが割当てられている。
5〜7は各受信ビーム毎に割当てられた受信部で
あり、8〜10は各受信部の中に配置された独立
した局部発振器であり、11は搬送波上のバース
ト信号を切換る切換回路、12〜14は所要の周
波数毎に変換し送信する送信部、15〜18は送
信ビーム素子である。
In recent years, in order to cope with the increasing demand for communications, the use of multi-beam satellite repeaters that use higher frequencies in the sub-millimeter wave band has been considered. Figure 1 uses a sub-millimeter wave band carrier wave.
An example of the configuration of an SS/TDMA repeater is shown. In the figure, 1 to 4 are receiving beam elements,
1 , 2 ...n are assigned so that the transmission frequencies from the transmitting station side do not combine within the same receiving beam.
5 to 7 are receiving sections assigned to each receiving beam, 8 to 10 are independent local oscillators placed in each receiving section, and 11 is a switching circuit for switching the burst signal on the carrier wave; Reference numerals 12 to 14 are transmitting units that convert and transmit each required frequency, and 15 to 18 are transmitting beam elements.

複数の受信部1〜4は上記に示す様に12
nなる異る周波数を受信するが、搬送波上のバ
ースト信号を切換る切換回路11の入力周波数は
共通となることが必要である。第1図の構成で共
通の中間周波数を得る為には、前記複数の受信部
内にある局部発振器8〜10の発振周波数を受信
周波数と中間周波数の差又は和に設定する必要が
ある。
The plurality of receiving units 1 to 4 are 1 , 2 , . . . as shown above.
Although n different frequencies are received, the input frequency of the switching circuit 11 that switches the burst signals on the carrier wave must be common. In order to obtain a common intermediate frequency with the configuration shown in FIG. 1, it is necessary to set the oscillation frequencies of the local oscillators 8 to 10 in the plurality of receiving sections to the difference or sum of the receiving frequency and the intermediate frequency.

また、複数の受信部内にある、発振周波数の異
る各々の局部発振器は周波数初期設定誤差や周波
数温度変化分もそれぞれ異る。この結果、受信信
号と混合して得られたそれぞれの中間周波数はほ
ぼ同一の周波数になるが、各々の中間周波数間で
の周波数のばらつきはかなり大きくなる。
In addition, local oscillators with different oscillation frequencies in the plurality of receiving sections have different frequency initial setting errors and frequency temperature changes. As a result, the respective intermediate frequencies obtained by mixing with the received signal have approximately the same frequency, but the frequency dispersion between the respective intermediate frequencies becomes considerably large.

例ば複数の受信部の受信入力周波数を30.0G
Hz、30.2GHz、30.4GHz、…とし、それぞれの受
信部内の局部発振器の発振周波数を28.0GHz、
28.2GHz、28.4GHz、…とすると、それぞれの中
間周波数は2.0GHzになる。この時、各々の局部
発振器において周波数初期設定誤差の最大偏差が
+2×10-6最小偏差が−2×10-6なる局部発振器
があり、周波数温度変化が最大の発振器と最小の
発振器間での周波数偏差が6×10-6程度あるとす
ると、中間周波数はほぼ2.0GHzであるが、各々
の中間周波数間での周波数のばらつきは約280K
Hzにもなる。
For example, the reception input frequency of multiple receivers is 30.0G.
Hz, 30.2GHz, 30.4GHz, ..., and the oscillation frequency of the local oscillator in each receiving section is 28.0GHz,
Assuming 28.2GHz, 28.4GHz,..., each intermediate frequency will be 2.0GHz. At this time, there is a local oscillator in which the maximum deviation of the frequency initial setting error is +2 × 10 -6 and the minimum deviation is -2 × 10 -6 , and the frequency temperature change is between the oscillator with the maximum and the minimum deviation. Assuming that the frequency deviation is about 6 × 10 -6 , the intermediate frequency is approximately 2.0 GHz, but the frequency variation between each intermediate frequency is approximately 280 K.
It also becomes Hz.

この様に各々の中間周波数が大きくばらついた
状態でバースト信号が切換回路に加えられると、
切換回路内で各通話路のバースト信号が切り換え
再編成された後、所要の周波数帯に変換されて送
信されるが、この再編成された送信搬送波は各バ
ースト信号毎に搬送周波数が大きく変化している
ことになる。
When a burst signal is applied to the switching circuit with each intermediate frequency widely varying in this way,
After the burst signals of each communication path are switched and reorganized in the switching circuit, they are converted to the required frequency band and transmitted, but the carrier frequency of this reorganized transmission carrier wave changes greatly for each burst signal. This means that

この様な搬送波のバースト信号を受信した受信
局では、搬送波のバースト信号を復調することに
なるが、各々のバースト信号毎に搬送周波数が大
きく変化しているので、復調器が応答することが
出来ず、通信が不能になるという欠点があつた。
A receiving station that receives such a carrier wave burst signal demodulates the carrier wave burst signal, but since the carrier frequency changes greatly for each burst signal, the demodulator cannot respond. However, there was a drawback that communication became impossible.

本発明による中継器は複数の受信ビームに対応
する複数の受信部に共通の発振器からの信号を供
給し、第2の中間周波数に近い第1の中間周波数
に変換し、この第1の中間周波数をある周波数f0
なる1つの発振器からの信号をそれぞれ逓倍して
得た信号とを混合して同一の第2の中間周波数に
変換することによつて、各々の中間周波数間の周
波数誤差を小さくすることにある。
A repeater according to the invention supplies a plurality of receivers corresponding to a plurality of receive beams with a signal from a common oscillator, converts it to a first intermediate frequency close to a second intermediate frequency, and converts the signal from a common oscillator to a first intermediate frequency close to a second intermediate frequency. at a certain frequency f 0
The objective is to reduce the frequency error between the respective intermediate frequencies by mixing the signals obtained by multiplying the signals from one oscillator and converting them into the same second intermediate frequency.

以下図面に従つて本発明の詳細を説明する。 The details of the present invention will be explained below with reference to the drawings.

第2図は本発明による準ミリ波帯の搬送波を用
いるSS/TDMA方式の中継器の構成例を示して
いる。図において19〜22は受信ビーム素子で
あり、同一受信ビーム内で送信局側からの送信周
波数が複合しない様にf1、f2、…fnが割り当てら
れている。23〜25は各受信ビーム毎に割り当
てられた受信部であり、この受信部は第1混合器
と増幅器より構成されている。26は周波数fLO1
なる信号を複数の受信部へ共通に供給する第1の
局部発振器であり、27〜29は第1の中間周波
数を第2の中間周波数へ変換する混合器である。
30は周波数fLO2なる発振器であり、31〜33
は発振器30の発振周波数を逓倍する逓倍次数の
異る逓倍器であり、各逓倍器の出力が第2局部発
振周波数となる。34は搬送波上のバースト信号
を切り換え再編成する切換回路である。35〜3
7は所要の周波数帯に信号を変換し送信する機能
を持つ送信部、38〜41は送信ビーム素子であ
る。
FIG. 2 shows an example of the configuration of an SS/TDMA repeater using sub-millimeter wave band carrier waves according to the present invention. In the figure, reference numerals 19 to 22 are receiving beam elements, and f 1 , f 2 , . 23 to 25 are receiving sections assigned to each receiving beam, and this receiving section is composed of a first mixer and an amplifier. 26 is the frequency f LO1
27 to 29 are mixers that convert the first intermediate frequency to the second intermediate frequency.
30 is an oscillator with a frequency f LO2 , and 31 to 33
are multipliers with different multiplication orders that multiply the oscillation frequency of the oscillator 30, and the output of each multiplier becomes the second local oscillation frequency. 34 is a switching circuit that switches and reorganizes the burst signals on the carrier wave. 35-3
7 is a transmitter having a function of converting a signal into a required frequency band and transmitting it, and 38 to 41 are transmitting beam elements.

複数の受信部23〜25で受信する周波数は、
送信局側の周波数が複合しない様にf1、f2、…fn
なる異る周波数が割り当てられているが、通常こ
の周波数割り当ては周波数間隔が等間隔あるいは
ある周波数の整数倍になつている場合が多い。
The frequencies received by the plurality of receivers 23 to 25 are as follows:
f 1 , f 2 ,...fn so that the frequencies on the transmitting station side do not combine
Different frequencies are assigned, but usually the frequency intervals are equal intervals or are integer multiples of a certain frequency.

SS/TDMA方式の通信システム方式を用いる
送信側の各局は基準信号源にセシウム周波数標準
器等の原子発振器や、恒温槽付水晶発振器等の高
安定で高精度の信号源を使用し、f1、f2…fnなる
信号を送信してくるので、受信部23〜25の入
力端における受信入力周波数f1、f2、…fnの誤差
は送信局部側の周波数設定誤差とドツプラー効果
によるごくわずかな周波数変化のみで、各周波数
間の周波数間隔のばらつきは極めて小さい。複数
の受信部で受信した各々の信号f1、f2、…fnは第
1の局部発振器26からの共通信号で混合され、
各々fIF1、fIF2、…fIFoなる第1中間周波数に変換
される。この際第1の中間周波数は第2の中間周
波数になるべく近く、かつ第2中間周波数と第1
の中間周波数の差がfLO2の整数倍になる様に設定
する。
Each station on the transmitting side using the SS/TDMA communication system uses a highly stable and highly accurate signal source such as an atomic oscillator such as a cesium frequency standard or a crystal oscillator with a constant temperature oven as a reference signal source . , f 2 ... fn are transmitted, so the errors in the reception input frequencies f 1 , f 2 , ... fn at the input ends of the receiving sections 23 to 25 are very small due to the frequency setting error on the transmitting local side and the Doppler effect. There is only a slight frequency change, and the variation in the frequency interval between each frequency is extremely small. The respective signals f 1 , f 2 , ... fn received by the plurality of receivers are mixed with a common signal from the first local oscillator 26,
The first intermediate frequencies are respectively f IF1 , f IF2 , . . . f IFo . At this time, the first intermediate frequency is as close as possible to the second intermediate frequency, and the second intermediate frequency and the first
Set so that the difference between the intermediate frequencies is an integral multiple of fLO2 .

複数の受信部に対しては第1の局部発振器26
が共通なので、局部発振器が持つ周波数初期設定
誤差や周波数温度変化分等の周波数誤差は各々の
第1の中間周波数に共通に現われるので、各々の
第1中間周波数の周波数間隔には影響を与えな
い。つまり第1の中間周波数の周波数間隔は受信
入力端での周波数間隔が保持されている。
A first local oscillator 26 for multiple receivers.
are common, so frequency errors such as frequency initial setting error and frequency temperature change of the local oscillator appear in common at each first intermediate frequency, so they do not affect the frequency interval of each first intermediate frequency. . In other words, the frequency interval of the first intermediate frequency is maintained at the frequency interval at the receiving input terminal.

次に発振器30からの周波数fLO2なる信号を、
第1の中間周波数と第2の中間周波数の差とfLO2
との整数倍分だけそれぞれ逓倍して得られた第2
局部発振周波数と前記第1の中間周波数をそれぞ
れ混合して、ほぼ同一周波数の第2の中間周波数
に変換する。
Next, the signal with the frequency f LO2 from the oscillator 30 is
The difference between the first intermediate frequency and the second intermediate frequency and f LO2
The second value obtained by multiplying each by an integer multiple of
The local oscillation frequency and the first intermediate frequency are mixed and converted into a second intermediate frequency having substantially the same frequency.

第1の中間周波数における各々の周波数間隔の
ばらつきは極めて小さいので、第2中間周波数に
おける、各々の周波数間の周波数差は主として発
振器30を逓倍したことにより生ずる。第3図は
発振器30と逓倍器の関係を示した図であり、3
0〜33は第2図で示すものと同じであり、42
〜44は第2局部発振器の出力端子である。つま
り、発振器30の出力を1逓倍、2逓倍、3逓倍
…して第2局部発振周波数を得ているが、逓倍次
数が1つ増加する毎に第2局部発振器の発振周波
数がfLO2増加すると共に発振器30の周波数初期
設定誤差と周波数温度変化分が加算され、周波数
誤差となつて現われる。
Since the variation in frequency intervals at the first intermediate frequency is extremely small, the frequency difference between the respective frequencies at the second intermediate frequency is mainly caused by multiplying the oscillator 30. FIG. 3 is a diagram showing the relationship between the oscillator 30 and the multiplier.
0 to 33 are the same as shown in Figure 2, and 42
-44 are output terminals of the second local oscillator. In other words, the output of the oscillator 30 is multiplied by 1, 2, 3, etc. to obtain the second local oscillation frequency, but each time the multiplication order increases by one, the oscillation frequency of the second local oscillator increases by f LO2 . At the same time, the frequency initial setting error of the oscillator 30 and the frequency temperature change are added and appear as a frequency error.

しかし、第1中間周波数は第2の中間周波数に
なるべく近く設定されているので、第2局部発振
周波数は第1図に示す局部発振周波数の約1/10〜
1/1000となり、発振器30の周波数誤差による第
2中間周波数への影響は第1図に示す場合と比較
すると約1/10〜1/1000になる。
However, since the first intermediate frequency is set as close as possible to the second intermediate frequency, the second local oscillation frequency is approximately 1/10 to 1/10 of the local oscillation frequency shown in FIG.
1/1000, and the influence on the second intermediate frequency due to the frequency error of the oscillator 30 is about 1/10 to 1/1000 compared to the case shown in FIG.

例ば受信入力周波数が30.0GHz、30.2GHz、
30.4GHz…であり、各々の受信部に共通な第1の
局部発振器26の周波数が27.8GHzであるとする
と、第1中間周波数は2.2GHz、2.4GHz、2.6GHz
…となる。第1の中間周波数の各々の周波数のば
らつきは極めて小さく無視出来る。次に発振周波
数200MHzなる発振器の信号を1逓倍、2逓倍、
3逓倍…して、各々の第1の中間周波数と混合し
周波数変換すると、2.0GHz、2.0GHz、2.0GHz…
なる第2の中間周波数が得られる。一方、200M
Hzなる発振器の周波数初期設定誤差が偏差で+2
×10-6あり、かつ周波数温度変化分が偏差で±6
×10-6あるとすると、逓倍次数が1つ異る毎に逓
倍器出力に現われる周波数誤差は偏差で+8×
10-6(周波数にすると1.6kHz)となり、この誤差
が各々の第2中間周波数における周波数誤差とな
つて現われる。しかし第1図に示す従来の中継器
構成例では切換回路の入力端における各々のバー
スト信号の搬送波の周波数のばらつきが280kHz
であつた、本発明の構成例では搬送波の周波数の
ばらつきは175分の1になる。
For example, if the receiving input frequency is 30.0GHz, 30.2GHz,
30.4 GHz... and the frequency of the first local oscillator 26 common to each receiving section is 27.8 GHz, then the first intermediate frequencies are 2.2 GHz, 2.4 GHz, 2.6 GHz.
...becomes... The variations in each of the first intermediate frequencies are extremely small and can be ignored. Next, the signal of the oscillator with an oscillation frequency of 200MHz is multiplied by 1, 2,
Multiply by 3..., mix with each first intermediate frequency, and convert the frequency to 2.0GHz, 2.0GHz, 2.0GHz...
A second intermediate frequency is obtained. Meanwhile, 200M
The initial frequency setting error of the oscillator, which is Hz, is +2 as a deviation.
×10 -6 and the frequency temperature change is ±6
×10 -6 , the frequency error that appears in the multiplier output each time the multiplication order differs by one is +8 ×
10 -6 (1.6kHz in frequency), and this error appears as a frequency error at each second intermediate frequency. However, in the conventional repeater configuration example shown in Figure 1, the frequency variation of the carrier wave of each burst signal at the input terminal of the switching circuit is 280 kHz.
However, in the configuration example of the present invention, the variation in carrier wave frequency is reduced to 1/175.

この様に複数の受信部に共通な発信器からの信
号を供給し、第2の中間周波数に近い第1の中間
周波数に変換し、この第1の中間周波数をある周
波数fLO2なる1つの発振器からの信号をそれぞれ
逓倍して得た信号とを混合して同一の第2の中間
周波数に変換することによつて、各々の第2の中
間周波数の周波数のばらつきを小さくすることが
出来る。第2の中間周波数に変換されたバースト
信号は切換え再編成して送信されるが、この再編
成された信号もバースト信号毎の搬送周波数のば
らつきは十分小さくなつているので、受信局側で
前記信号を受信してバースト信号を復調する際
に、復調器が十分に追従することが出来、SS/
TDMA方式の通信を行う上で極めて有用である。
In this way, a signal from a common oscillator is supplied to multiple receivers, converted to a first intermediate frequency close to the second intermediate frequency, and this first intermediate frequency is transmitted to one oscillator at a certain frequency f LO2 . By mixing the signals obtained by multiplying the signals from and converting them into the same second intermediate frequency, it is possible to reduce the frequency variations of the respective second intermediate frequencies. The burst signal converted to the second intermediate frequency is switched and reorganized and transmitted, but since the dispersion of the carrier frequency for each burst signal is sufficiently small, the receiving station side When receiving the signal and demodulating the burst signal, the demodulator can sufficiently track the SS/
This is extremely useful for TDMA communication.

以上の例では局部発振器が2個の場合で説明し
たが、局部発振器の数は3個以上でもよく特に規
定するものではない。また使用周波数は準ミリ波
帯で、逓倍器の逓倍次数は1逓倍以上で説明した
が、これらに関しては特に規定するものではな
い。
In the above example, the case where there are two local oscillators has been explained, but the number of local oscillators may be three or more and is not particularly specified. Further, although the frequency used is a quasi-millimeter wave band and the multiplication order of the multiplier is 1 multiplication or more, there is no particular restriction on these.

以上説明した様に、複数の受信部に共通な発振
器からの信号を供給し、第2の中間周波数に近い
第1の中間周波数に変換し、この第1の中間周波
数をある周波数f0なる1つの発振器からの信号を
それぞれ逓倍して得た信号とを混合して同一の第
2の中間周波数に変換することによつて、各々の
第2の中間周波数の周波数のばらつきは十分小さ
くすることが出来る。この為SS/TDMA方式の
通信システムに本方式を用いることにより、準ミ
リ波帯の搬送波を用いても複調器が十分に追従
し、実用に際し有益である。
As explained above, a signal from a common oscillator is supplied to a plurality of receivers, converted to a first intermediate frequency close to the second intermediate frequency, and this first intermediate frequency is converted to a certain frequency f0 , 1 By mixing the signals obtained by multiplying the signals from two oscillators and converting them to the same second intermediate frequency, the frequency variation of each second intermediate frequency can be made sufficiently small. I can do it. Therefore, by using this method in an SS/TDMA communication system, the demodulator can sufficiently follow even when a sub-millimeter wave band carrier wave is used, which is useful in practical use.

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

第1図は準ミリ波帯の搬送波を用いるSS/
TDMA方式の中継器の構成例である。第2図は
本発明による準ミリ波帯の搬送波を用いるSS/
TDMA方式の中継器の構成例である。第3図は
第2局部発振器の構成例である。 図において、1〜4……受信ビーム素子、5〜
7……受信部、8〜10……局部発振器、11…
…切換回路、12〜14……送信部、15〜18
……送信ビーム素子、19〜22……受信ビーム
素子、23〜25……受信部、26……第1局部
発振器、27〜29……混合器、30……発振
器、31〜33……逓倍器、34……切換回路、
35〜37……送信部、38〜41……送信ビー
ム素子、42〜44……逓倍器の出力端子であ
る。
Figure 1 shows SS/SS using a carrier wave in the sub-millimeter wave band.
This is an example of the configuration of a TDMA repeater. Figure 2 shows an SS/SS system using sub-millimeter wave band carrier waves according to the present invention.
This is an example of the configuration of a TDMA repeater. FIG. 3 shows an example of the configuration of the second local oscillator. In the figure, 1 to 4... receiving beam elements, 5 to
7... Receiving section, 8-10... Local oscillator, 11...
...Switching circuit, 12-14...Transmission section, 15-18
... Transmission beam element, 19-22 ... Reception beam element, 23-25 ... Receiving section, 26 ... First local oscillator, 27-29 ... Mixer, 30 ... Oscillator, 31-33 ... Multiplier device, 34...switching circuit,
35-37...Transmission section, 38-41...Transmission beam element, 42-44...Output terminal of multiplier.

Claims (1)

【特許請求の範囲】 1 複数の受信周波数をそれぞれ複数の第1の中
間周波数に変換して出力する第1の周波数変換器
と、前記複数の第1の中間周波数をそれぞれ複数
の第2の中間周波数に変換して出力する第2の周
波数変換器と、前記複数の第2の中間周波数を指
定された複数の信号に編成替えする切替回路と、
前記複数の信号を所要の周波数帯の信号に変換し
送信する回路とを有するヘテロダイン中継器にお
いて、 前記第1の周波数変換器が、前記複数の受信周
波数に対応して設けられ前記複数の受信周波数と
第1の局部発振周波数をそれぞれ混合して前記複
数の第1の中間周波数をそれぞれ発生する複数の
第1の周波数混合器と、前記複数の第1の混合器
に共通に前記第1の局部発振周波数を供給する第
1の局部発振器とを含み、 前記第2の周波数変換器が、前記複数の第1の
中間周波数に対応して設けられ前記複数の第1の
中間周波数と複数の第2の局部発振周波数をそれ
ぞれ混合して前記複数の第2の中間周波数をそれ
ぞれ発生する複数の第2の混合器と、所定の周波
数を発生する第2の局部発振器と、前記所定の周
波数をそれぞれ所望の次数逓倍して前記複数の第
2の混合器に前記複数の第2の局部発振周波数と
してそれぞれ供給する複数の周波数逓倍器とを含
み、 前記複数の第1の中間周波数と前記複数の第2
の中間周波数のそれぞれの周波数差ができるだけ
小さく、かつ前記それぞれの周波数差が前記第2
の局部発振器からの前記所定の周波数のそれぞれ
整数倍になるように前記第1の局部発振周波数を
設定したことを特徴とする内部切換機能付中継
器。
[Scope of Claims] 1. A first frequency converter that converts a plurality of reception frequencies into a plurality of first intermediate frequencies and outputs the same; a second frequency converter that converts into a frequency and outputs it; a switching circuit that rearranges the plurality of second intermediate frequencies into a plurality of designated signals;
and a circuit for converting the plurality of signals into signals of a required frequency band and transmitting the same, wherein the first frequency converter is provided corresponding to the plurality of reception frequencies, and the first frequency converter is provided corresponding to the plurality of reception frequencies, and a first local oscillation frequency, respectively, to generate the plurality of first intermediate frequencies; a first local oscillator that supplies an oscillation frequency, and the second frequency converter is provided corresponding to the plurality of first intermediate frequencies and is configured to connect the plurality of first intermediate frequencies and the plurality of second intermediate frequencies. a plurality of second mixers that generate the plurality of second intermediate frequencies by mixing the respective local oscillation frequencies; a second local oscillator that generates a predetermined frequency; and a second local oscillator that generates a predetermined frequency. a plurality of frequency multipliers which multiply the orders of the plurality of local oscillation frequencies and respectively supply the plurality of second local oscillation frequencies to the plurality of second mixers, the plurality of first intermediate frequencies and the plurality of second local oscillation frequencies.
The frequency difference between the intermediate frequencies is as small as possible, and the frequency difference between the intermediate frequencies is as small as possible.
A repeater with an internal switching function, characterized in that the first local oscillation frequency is set to be an integral multiple of each of the predetermined frequencies from the local oscillator.
JP2395483A 1983-02-16 1983-02-16 Repeater with internal switching function Granted JPS59149434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2395483A JPS59149434A (en) 1983-02-16 1983-02-16 Repeater with internal switching function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2395483A JPS59149434A (en) 1983-02-16 1983-02-16 Repeater with internal switching function

Publications (2)

Publication Number Publication Date
JPS59149434A JPS59149434A (en) 1984-08-27
JPS6366095B2 true JPS6366095B2 (en) 1988-12-19

Family

ID=12124935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2395483A Granted JPS59149434A (en) 1983-02-16 1983-02-16 Repeater with internal switching function

Country Status (1)

Country Link
JP (1) JPS59149434A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6048630A (en) * 1983-08-29 1985-03-16 Nec Corp Repeating installation provided with internal switching function
CA2157209C (en) * 1995-08-30 2001-04-10 Robert Peach Repeaters for multibeam satellites
KR100497940B1 (en) * 2003-01-06 2005-07-01 대성뉴텍(주) Wireless LAN transmitter
JP5854718B2 (en) * 2011-09-08 2016-02-09 日本無線株式会社 Satellite signal receiver
JP6049328B2 (en) * 2012-06-28 2016-12-21 日本電波工業株式会社 Frequency measuring device

Also Published As

Publication number Publication date
JPS59149434A (en) 1984-08-27

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