JPH0151103B2 - - Google Patents
Info
- Publication number
- JPH0151103B2 JPH0151103B2 JP58108162A JP10816283A JPH0151103B2 JP H0151103 B2 JPH0151103 B2 JP H0151103B2 JP 58108162 A JP58108162 A JP 58108162A JP 10816283 A JP10816283 A JP 10816283A JP H0151103 B2 JPH0151103 B2 JP H0151103B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- local
- local oscillator
- period
- local oscillation
- 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
Links
- 230000010355 oscillation Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 7
- 238000001228 spectrum Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/10—Arrangements for reducing cross-talk between channels
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Description
【発明の詳細な説明】
この発明は周波数チヤネルをきめられた時間系
列で切換えて通信を行う通信装置に用いられる受
信装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a receiving device used in a communication device that performs communication by switching frequency channels in a determined time sequence.
従来この種の装置として第１図に示すものがあ
つた。図において、１は空中線、２は高周波増幅
器、３は混合器、４は中間周波フイルタ、５は中
間周波増幅器、６は検波器、７は信号処理器、８
は局発切換スイツチ、９は局発信号を発振する局
部発振器で、これは使用周波数チヤネルと同じ個
数だけ設けられ、例えば、Ｎチヤネル使用の場合
は局部発振器９．１〜９．Ｎが設けられ、該局部
発振器９．１〜９．Ｎと、局発切換スイツチ８に
より局発発生器１０が構成されている。 A conventional device of this type is shown in FIG. In the figure, 1 is an antenna, 2 is a high frequency amplifier, 3 is a mixer, 4 is an intermediate frequency filter, 5 is an intermediate frequency amplifier, 6 is a detector, 7 is a signal processor, 8
9 is a local oscillator changeover switch, and 9 is a local oscillator that oscillates a local oscillator signal, and the number of these is the same as the number of frequency channels used. For example, when using N channels, local oscillators 9.1 to 9. N are provided, and the local oscillators 9.1-9. A local oscillator generator 10 is constituted by the local oscillator N and the local oscillator changeover switch 8.
また第３図は受信信号Ｆと局発信号FLの時間
関係を示す図である。 Further, FIG. 3 is a diagram showing the time relationship between the received signal F and the local oscillator signal FL .
次に動作について説明する。空中線１で受信さ
れた信号は高周波増幅器２で増幅された後、混合
器３で局部発振器９．１〜９．Ｎのいずれかから
の局発信号が混合され、しかる後中間周波フイル
タ４に供給される。局部発振器９．１〜９．Ｎは
あらかじめきめられた手順で局発切換スイツチ８
により切換えられ、これにより受信周波数チヤネ
ルに対応する局発信号が混合器３に供給される。
そして中間周波に変換された信号は中間周波増幅
器５、検波器６を経て信号処理器７に供給され、
ここで送信信号が復調される。 Next, the operation will be explained. The signal received by the antenna 1 is amplified by a high frequency amplifier 2, and then is sent to a mixer 3 by local oscillators 9.1 to 9. The local oscillator signals from any of the N are mixed and then supplied to the intermediate frequency filter 4. Local oscillators 9.1-9. N is the local switching switch 8 according to a predetermined procedure.
As a result, the local oscillator signal corresponding to the receiving frequency channel is supplied to the mixer 3.
The signal converted to an intermediate frequency is then supplied to a signal processor 7 via an intermediate frequency amplifier 5 and a wave detector 6.
Here, the transmitted signal is demodulated.
なお局部発振器９．１〜９．Ｎは局発切換スイ
ツチ８により信号処理器７の切換信号２０に応じ
て所定の手順で切換られる。ここで中間周波数を
fIFとすれば、受信信号Ｆと局発信号FLとの間に
はＦ＝FL±fIFの関係があり、この受信信号Ｆの
受信周期と局発信号FLの切換周期との関係は第
３図に示すとおりであり、図から明らかなように
両者は等しくなつている。 Note that local oscillators 9.1 to 9. N is switched by the local oscillator switch 8 in accordance with a switching signal 20 from the signal processor 7 in a predetermined procedure. Here, the intermediate frequency is
f IF , there is a relationship between the received signal F and the local signal F L as F = F L ±f IF , and the reception period of the received signal F and the switching period of the local signal F L are The relationship is as shown in FIG. 3, and as is clear from the figure, the two are equal.
従来の受信装置は以上のように構成されている
ので、局発信号の高速切換時に周波数スペクトラ
ムが拡がり、周波数チヤネルをきめられた高速時
間系列で切換えるようにした通信装置において
は、複数の通信をする場合、混信を生じ易いとい
う欠点があつた。また、混信を防止するため低速
切換にしてガード時間を設けると、今度は伝送効
率が低下するという欠点があつた。 Since conventional receiving devices are configured as described above, the frequency spectrum expands when local signals are switched at high speed, and communication devices that switch frequency channels in a determined high-speed time sequence can handle multiple communications. In this case, there was a drawback that interference was likely to occur. Furthermore, when switching at a low speed and providing a guard time to prevent interference, there is a drawback that the transmission efficiency decreases.
この発明は上記のような従来のものの欠点を除
去するためになされたもので、局発発生器を複数
個設け、局発信号の切換周期を受信高周波の時間
系列の周期より遅くし、かつ該切換周期を各局発
発生器毎にずらせることにより、局発信号のスペ
クトラムの拡がりを高速時間系列で切換えて通信
するのにさしつかえない程度に軽減できる受信装
置を提供することを目的としている。 This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and it includes a plurality of local oscillator generators, makes the switching period of the local oscillator signal slower than the period of the time series of the received high frequency, and The purpose of the present invention is to provide a receiving device capable of reducing the spread of the spectrum of a local oscillator signal to the extent that it is sufficient for communication by switching in a high-speed time series by shifting the switching period for each local oscillator generator.
以下、この発明の一実施例を図について説明す
る。第２図において第１図と同一符号は同一又は
相当部分を示し、１１ａ，１１ｂは高周波増幅器
２の出力に相互に並列に接続された第１、第２受
信検波回路で、これらは各々混合器３、中間周波
フイルタ４、中間周波増幅器５、検波器６から構
成されている。また１０ａ，１０ｂは第１、第２
局発発生器で、第１局発発生器１０ａは局発切換
スイツチ８ａ、局部発振器９．１〜９．（２Ｎ−
１）により、また第２局発発生器１０ｂは第２局
発切換スイツチ８ｂ、局部発振器９．２〜９．２
Ｎにより構成されている。 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, the same reference numerals as in FIG. 1 indicate the same or equivalent parts, and 11a and 11b are first and second receiving detection circuits connected in parallel to the output of the high frequency amplifier 2, and these are each a mixer. 3, an intermediate frequency filter 4, an intermediate frequency amplifier 5, and a wave detector 6. Also, 10a and 10b are the first and second
The first local oscillator 10a is a local oscillator, and the first local oscillator 10a has a local oscillator switch 8a and local oscillators 9.1 to 9. (2N-
1), the second local oscillator 10b is connected to the second local oscillator changeover switch 8b and the local oscillators 9.2 to 9.2.
It is composed of N.
第４図は本実施例における受信信号Ｆの受信周
期と局発信号Fa及び局発信号Fbの発振周期との
関係を示したものである。 FIG. 4 shows the relationship between the reception period of the reception signal F and the oscillation periods of the local oscillation signal Fa and the local oscillation signal Fb in this embodiment.
次に動作について説明する。空中線１で受信さ
れた受信信号Ｆは高周波増幅器２で増幅された
後、第１受信検波回路１１ａの混合器３ａで該受
信信号Ｆの時間系列の周期に比して１チヤネル分
スキツプした局発信号Faと混合されて中間周波
フイルタ４ａに供給され、さらに中間周波増幅器
５ａ、検波器６ａを経て信号処理器７に供給され
る。さらに上記受信信号Ｆは上記と同様に第２受
信検波回路１１ｂの混合器３ｂで１チヤネル分ス
キツプした局発信号Fbと混合されて中間周波フ
イルタ４ｂに供給され、さらに中間周波増幅器５
ｂ、検波器６ｂを経て信号処理器７に供給され、
該信号処理器７で上記検波器６ａからの盾記信号
と合成され、これにより送信信号に復調される。 Next, the operation will be explained. After the received signal F received by the antenna 1 is amplified by the high frequency amplifier 2, the mixer 3a of the first receiving detection circuit 11a outputs the station signal by skipping one channel compared to the period of the time series of the received signal F. The mixed signal Fa is supplied to an intermediate frequency filter 4a, and further supplied to a signal processor 7 via an intermediate frequency amplifier 5a and a wave detector 6a. Further, the received signal F is mixed with the local oscillation signal Fb skipped by one channel by the mixer 3b of the second reception detection circuit 11b in the same manner as described above, and is supplied to the intermediate frequency filter 4b, and further to the intermediate frequency amplifier 5.
b, supplied to the signal processor 7 via the detector 6b,
The signal processor 7 combines the signal with the shield signal from the detector 6a, thereby demodulating it into a transmission signal.
局発信号Fa，Fbのスキツプの様子は第４図に
示すとりであり、両信号Fa，Fbの切換周期は上
記受信信号Ｆの周期の２倍の長さであり、かつ両
信号Fa，Fbの切換周期は相互に1/2周期ずれてい
る。なお、この局部発振器９．１〜９．（２Ｎ−
１），９．２〜９．２Ｎはそそれぞれ切換スイツ
チ８ａ，８ｂにより上記信号処理器７の切換信号
２０ａ，２０ｂに応じて切換えられる。 The state of skipping of the local oscillator signals Fa and Fb is as shown in Fig. 4, and the switching period of both signals Fa and Fb is twice as long as the period of the received signal F, and both signals Fa and Fb are skipped. The switching cycles of are shifted from each other by 1/2 cycle. Note that these local oscillators 9.1 to 9. (2N-
1), 9.2 to 9.2N are switched in accordance with switching signals 20a and 20b from the signal processor 7 by respective switching switches 8a and 8b.
なお、上記実施例では、局部発振器を複数個設
け、これらを所定周期で切換えた場合について説
明したが、周波数合成器を複数個設けてもよく、
このようにしても上記実施例と同様の効果を奏す
る。 In the above embodiment, a case has been described in which a plurality of local oscillators are provided and these are switched at a predetermined period, but a plurality of frequency synthesizers may be provided.
Even in this case, the same effects as in the above embodiment can be achieved.
また、上記実施例では、局発信号の切換周期を
第１、第２局発発生器１０ａ，１０ｂ毎にずら
し、かつ切換周期を受信周期より遅くした場合に
ついて述べたが、この局発信号についてはさらに
フイルタ等による波形成形によるスペクトラム制
限をすれば更によい。 Furthermore, in the above embodiment, a case has been described in which the switching period of the local oscillator signal is shifted for each of the first and second local oscillator generators 10a and 10b, and the switching period is made slower than the receiving period. It is even better if the spectrum is limited by waveform shaping using a filter or the like.
以上のように、この発明によれば局発発生器及
び混合器を複数個設け、局発信号の切換周期を受
信周期より遅くし、かつ該切換周期を各局発発生
器毎にずらせたので、混信等に対する受信のダイ
ナミツクレンジを拡げられる効果がある。 As described above, according to the present invention, a plurality of local oscillator generators and mixers are provided, the switching period of the local oscillator signal is made slower than the receiving period, and the switching period is shifted for each local oscillator. This has the effect of expanding the dynamic range of reception against interference, etc.
第１図は従来の受信装置の系統図、第２図は本
発明の一実施例による受信装置の系統図、第３図
ａ，ｂは上記従来装置の受信信号と局発信号との
関係を説明するための図、第４図ａ，ｂ，ｃは上
記実施例の受信信号と局発信号との関係を説明す
るための図である。
２……高周波増幅器、３ａ，３ｂ……混合器、
７……信号処理器、１０ａ，１０ｂ……局発発生
器、１１ａ，１１ｂ……受信検波回路。なお図
中、同一符号は同一又は相当部分を示す。
FIG. 1 is a system diagram of a conventional receiving device, FIG. 2 is a system diagram of a receiving device according to an embodiment of the present invention, and FIGS. Figures 4a, 4b and 4c are diagrams for explaining the relationship between the received signal and the local oscillator signal in the above embodiment. 2... High frequency amplifier, 3a, 3b... Mixer,
7...Signal processor, 10a, 10b...Local generator, 11a, 11b...Reception detection circuit. In the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
通信を行う通信装置に用いられる受信装置におい
て、受信した高周波を増幅する高周波増幅器と、
該高周波増幅器の出力を局発信号と混合し信号成
分を検波出力する相互に並列接続された複数の受
信検波回路と、該各受信検波回路の混合器に各々
複数の異なる周波数の局発信号を供給する複数の
局発発生器と、上記複数の受信検波回路の出力を
入力とし送信信号を復調する信号処理器とを備
え、上記局発発生器の出力局発信号の周期を上記
時間系列の周期より遅くかつ各局発発生器毎にず
れた周期としたことを特徴とする受信装置。 ２ 上記局発発生器は、波形成形によりスペクト
ラム制限された局発信号を出力するものであるこ
とを特徴とする特許請求の範囲第１項記載の受信
装置。[Claims] 1. In a receiving device used in a communication device that performs communication by switching frequency channels in a predetermined time sequence, a high-frequency amplifier that amplifies received high-frequency waves;
A plurality of reception detection circuits connected in parallel mutually mix the output of the high frequency amplifier with a local oscillation signal and detect and output the signal components, and a plurality of local oscillation signals of different frequencies are respectively sent to the mixer of each reception detection circuit. It is equipped with a plurality of local oscillator generators that supply the local oscillator, and a signal processor that receives the outputs of the plurality of receiving detection circuits as input and demodulates the transmitted signal, A receiving device characterized in that the period is slower than the period and is shifted for each local generator. 2. The receiving device according to claim 1, wherein the local oscillation generator outputs a local oscillation signal whose spectrum is limited by waveform shaping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58108162A JPS59231940A (en) | 1983-06-14 | 1983-06-14 | Receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58108162A JPS59231940A (en) | 1983-06-14 | 1983-06-14 | Receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59231940A JPS59231940A (en) | 1984-12-26 |
| JPH0151103B2 true JPH0151103B2 (en) | 1989-11-01 |
Family
ID=14477533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58108162A Granted JPS59231940A (en) | 1983-06-14 | 1983-06-14 | Receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59231940A (en) |
-
1983
- 1983-06-14 JP JP58108162A patent/JPS59231940A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59231940A (en) | 1984-12-26 |
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