JPS6333824B2 - - Google Patents
Info
- Publication number
- JPS6333824B2 JPS6333824B2 JP17005081A JP17005081A JPS6333824B2 JP S6333824 B2 JPS6333824 B2 JP S6333824B2 JP 17005081 A JP17005081 A JP 17005081A JP 17005081 A JP17005081 A JP 17005081A JP S6333824 B2 JPS6333824 B2 JP S6333824B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- signals
- carrier wave
- control signal
- 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
- 238000000034 method Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000008054 signal transmission Effects 0.000 claims description 4
- 230000010355 oscillation Effects 0.000 description 12
- 230000007257 malfunction Effects 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/68—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for wholly or partially suppressing the carrier or one side band
Description
【発明の詳細な説明】
本発明は、抑圧搬送波による通信における呼出
あるいは制御を行うための制御信号を極めて安定
に伝送することのできる制御信号伝送方式に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control signal transmission system that can extremely stably transmit control signals for paging or controlling communications using suppressed carrier waves.
従来の抑圧搬送波による通信においては、搬送
波が抑圧されているため、送信側から送られてく
る信号を検出する際に送信周波数あるいは受信周
波数の変動が復調される信号の周波数変動とな
る。このため、信号を検出するろ波器の通信帯域
幅は送受信機の周波数安定度により決定される帯
域幅が必要となり、他の電波信号・雑音等により
誤動作の機会が多く安定した呼出あるいは制御を
行う事が困難であつた。信号周波数の検出を単独
のろ波器で行う以上、誤動作をなくすことと不動
作をなくすことは背反する関係にある。すなわち
雑音による誤動作をなくすためにフイルタの通過
帯域幅を狭めると送受信機の周波数変動によりフ
イルタの通過帯域をはずれ不動作を生じ、不動作
をなくすようにフイルタの通過帯域幅を拡げると
雑音による誤動作を生じる。このことが、抑圧搬
送波通信における信号方式の大きな欠点となつて
いた。 In conventional communication using a suppressed carrier wave, the carrier wave is suppressed, so that when a signal sent from the transmitting side is detected, fluctuations in the transmission frequency or reception frequency become frequency fluctuations in the signal to be demodulated. For this reason, the communication bandwidth of the filter that detects the signal must be determined by the frequency stability of the transmitter/receiver, and there is a high chance of malfunction due to other radio signals, noise, etc., and stable calling or control is not possible. It was difficult to do. As long as the signal frequency is detected by a single filter, there is a trade-off between eliminating malfunctions and eliminating non-operations. In other words, if you narrow the filter's passband width to eliminate malfunctions caused by noise, the frequency fluctuations of the transmitter and receiver will cause the filter to deviate from the passband, resulting in non-operation.If you widen the filter's passband width to eliminate malfunctions, malfunctions will occur due to noise. occurs. This has been a major drawback of the signaling system in suppressed carrier wave communication.
本発明は、これらの欠点を解決する為に呼出、
制御を行う制御信号を送る際に、２つの異なる周
波数の信号を使用し受信側でその２つの信号の差
の周波数を検出する事により送受信周波数変動の
影響をなくし、フイルタを狭帯域化して他の信号
雑音による誤動作を軽減し極めて安定な制御信号
の伝達を行う方式で、以下図面によつて詳細に説
明する。 The present invention seeks to solve these drawbacks.
When sending control signals to perform control, signals with two different frequencies are used, and the receiving side detects the difference in frequency between the two signals, thereby eliminating the influence of transmitting and receiving frequency fluctuations, narrowing the filter band, and other functions. This method reduces malfunctions caused by signal noise and transmits extremely stable control signals, and will be explained in detail below with reference to the drawings.
第１図は、本発明の実施例であつて１は第１発
振回路、２は第２発振回路、３は信号送出回路、
４は制御信号入力端子、５は抑圧搬送波送信機、
６は抑圧搬送波受信機、７は第１信号検出用フイ
ルタ、８は第２信号検出用フイルタ、９は信号周
波数合成回路、１０は狭帯域フイルタ、１１は信
号解読回路、１２は制御信号出力端子である。 FIG. 1 shows an embodiment of the present invention, in which 1 is a first oscillation circuit, 2 is a second oscillation circuit, 3 is a signal sending circuit,
4 is a control signal input terminal, 5 is a suppressed carrier wave transmitter,
6 is a suppressed carrier wave receiver, 7 is a first signal detection filter, 8 is a second signal detection filter, 9 is a signal frequency synthesis circuit, 10 is a narrowband filter, 11 is a signal decoding circuit, and 12 is a control signal output terminal. It is.
第２図は第１図中のＡ〜Ｉの各点での信号の状
態を示したものである。 FIG. 2 shows the signal states at each point A to I in FIG. 1.
以下に第１図に示す本発明の実施例装置の動作
を示す。第２図ａのＡ，Ｂに示される第１発振回
路１と第２発振回路２よりの周波数の異なる２つ
の信号は信号送出回路３にいて、制御信号入力端
子４より入力される第２図ｂ中に示される制御信
号に応じて変化する信号。すなわち制御信号が重
畳された第２図ｂのＣに示される信号に変換され
る。変換された信号は抑圧搬送波送信機５へ入力
され変調されて第２図ｃのＤに示される信号にな
り送信アンテナより送出される。送出された信号
は受信アンテナにより受けられ抑圧搬送波受信機
６により復調され第２図ｄのＥに示す信号が得ら
れる。復調された２つの信号は、従来の様に送信
機５の送信用搬送波の周波数の変動及び受信機６
の受信用搬送波の周波数変動の影響を受け、周波
数変動Δfを生じるが、これら２つの信号に対し
て搬送波の周波数変動の影響は同一である。 The operation of the apparatus according to the embodiment of the present invention shown in FIG. 1 will be described below. Two signals having different frequencies from the first oscillation circuit 1 and the second oscillation circuit 2 shown at A and B in FIG. A signal that changes depending on the control signal shown in b. That is, it is converted into a signal shown in C of FIG. 2b on which the control signal is superimposed. The converted signal is input to the suppressed carrier transmitter 5, where it is modulated and becomes the signal shown in D in FIG. 2c, which is transmitted from the transmitting antenna. The transmitted signal is received by the receiving antenna and demodulated by the suppressed carrier receiver 6 to obtain the signal shown at E in FIG. 2d. The two demodulated signals are processed by the frequency fluctuation of the carrier wave for transmission by the transmitter 5 and by the receiver 6 as in the conventional case.
is affected by the frequency fluctuation of the reception carrier wave, resulting in a frequency fluctuation Δf, but the influence of the frequency fluctuation of the carrier wave is the same for these two signals.
復調された信号は、従来の様に送受信機５，６
の周波数安定度から考えられる範囲の帯域幅を持
つた第１信号検出用フイルタ７と第２信号検出用
フイルタ８に入力され、それぞれ信号の周波数に
応じたフイルタを通過することにより分離され、
第２図ｅのＦ，Ｇに示す２つの信号に変換され
る。変換された２つの信号は信号周波数合成回路
９へ入力され、それら周波数の差をとつた第２図
ｆ中のＨで示す信号が出力として得られる。 The demodulated signal is sent to the transmitter/receiver 5, 6 as in the conventional case.
The signal is input to a first signal detection filter 7 and a second signal detection filter 8, each having a bandwidth within a range considered from the frequency stability of the signal, and is separated by passing through a filter corresponding to the frequency of the signal.
It is converted into two signals shown at F and G in FIG. 2e. The two converted signals are input to the signal frequency synthesis circuit 9, and the signal indicated by H in FIG. 2f, which is the difference in their frequencies, is obtained as an output.
この際、上述したように搬送波の周波数変動の
影響は、２つの信号に対して同一であるため、信
号周波数合成回路９の出力信号は、その影響を受
けず第１発振回路１と第２発振回路２の発振周波
数の差のみを忠実に再現したものとなる。信号周
波数合成回路９の出力信号は、２つの発振回路
１，２の安定度を考慮した極めて狭い帯域幅を持
つた狭帯域フイルタ１０を通過し信号解読回路１
１へ入力される。解読回路１１で解読され取出さ
れた制御信号は、制御信号出力端子１２へ出力さ
れる。 At this time, as mentioned above, the influence of the frequency fluctuation of the carrier wave is the same for the two signals, so the output signal of the signal frequency synthesis circuit 9 is not affected by the frequency fluctuation of the first oscillation circuit 1 and the second oscillation circuit 1. Only the difference in the oscillation frequency of circuit 2 is faithfully reproduced. The output signal of the signal frequency synthesis circuit 9 passes through a narrowband filter 10 which has an extremely narrow bandwidth considering the stability of the two oscillation circuits 1 and 2, and then passes through a narrowband filter 10 that takes into account the stability of the two oscillation circuits 1 and 2.
1. The control signal decoded and extracted by the decoding circuit 11 is output to the control signal output terminal 12.
第２図ｇは、信号解読回路の入力信号と出力信
号の関係を示したものであり、制御信号入力端子
４より入力された制御信号と同一の信号が制御信
号出力端子１２へ出力されることを示している。 FIG. 2g shows the relationship between the input signal and the output signal of the signal decoding circuit, and shows that the same signal as the control signal input from the control signal input terminal 4 is output to the control signal output terminal 12. It shows.
以上説明したように、抑圧搬送波送受信機の搬
送波周波数の変動の影響を受けることなく制御信
号の送受信が行える。このため２つの発振回路
１，２の周波数安定度のみを考慮した狭帯域フイ
ルタを用いて制御信号のろ波を行うことが可能と
なり雑音成分及び他の信号を含まないＳ／Ｎ比の
大きい制御信号の伝送が可能となる。 As described above, control signals can be transmitted and received without being affected by fluctuations in the carrier frequency of the suppressed carrier wave transceiver. Therefore, it is possible to filter the control signal using a narrow band filter that takes into account only the frequency stability of the two oscillation circuits 1 and 2, and control with a high S/N ratio that does not include noise components or other signals. Signal transmission becomes possible.
実施例の説明においては、送受信アンテナを介
して信号の伝送を行う無線通信を例示して本発明
の説明を行つたが、伝送方式が抑圧搬送波伝送方
式であれば同軸ケーブルを用いた有線通信その他
の媒体による通信であつても本発明を実施するこ
とにより同一の効果を得ることが可能である。 In the description of the embodiments, the present invention has been explained by exemplifying wireless communication in which signals are transmitted via transmitting and receiving antennas, but if the transmission method is a suppressed carrier wave transmission method, wired communication using a coaxial cable, etc. It is possible to obtain the same effect by implementing the present invention even when communication is performed using any medium.
以上説明したように本発明によれば抑圧搬送波
通信において回線の呼出あるいは制御に際して狭
帯域フイルタを使用することが可能となり誤動
作、不動作の少ない極めて安定した制御信号の伝
送を行うことができるという利点がある。 As explained above, according to the present invention, it is possible to use a narrowband filter when paging or controlling a line in suppressed carrier wave communication, and the advantage is that extremely stable control signal transmission with few malfunctions and non-operations can be performed. There is.
第１図は、本発明の実施例の構成を示す図、第
２図は、実施例の各点における信号の状態を示す
図。
１……第１発振回路、２……第２発振回路、３
……信号送出回路、４……制御信号入力端子、５
……抑圧搬送波送信機、６……抑圧搬送波受信
機、７……第１信号検出用フイルタ、８……第２
信号検出用フイルタ、９……信号周波数合成回
路、１０……狭帯域フイルタ、１１……信号解読
回路、１２……制御信号出力端子。
FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram showing the state of signals at each point in the embodiment. 1...First oscillation circuit, 2...Second oscillation circuit, 3
...Signal sending circuit, 4...Control signal input terminal, 5
... suppressed carrier wave transmitter, 6 ... suppressed carrier wave receiver, 7 ... first signal detection filter, 8 ... second
Signal detection filter, 9... Signal frequency synthesis circuit, 10... Narrowband filter, 11... Signal decoding circuit, 12... Control signal output terminal.
Claims (1)
数を有する信号に同一の制御信号を重畳する過程
と伝送路を介して対向して設置された抑圧搬送波
送受信装置により該２つの信号を変調、伝送及び
復調する過程と復調された２つの相異なる周波数
を有する信号よりこれらの信号の差の周波数を有
する信号を作り、狭帯域フイルタを通すことによ
り差の周波数に相当する周波数成分の信号のみを
抽出する過程と抽出された信号を解読し制御信号
を取出す過程よりなることを特徴とする抑圧搬送
波通信用制御信号伝送方式。1. In suppressed carrier wave communication, the process of superimposing the same control signal on signals having two different frequencies, and modulating, transmitting, and demodulating the two signals by suppressed carrier wave transmitting and receiving devices installed facing each other via a transmission path. A process of creating a signal having a frequency that is the difference between two demodulated signals having different frequencies, and extracting only a signal with a frequency component corresponding to the frequency of the difference by passing it through a narrow band filter. A control signal transmission method for suppressed carrier wave communication characterized by comprising a process of decoding an extracted signal and extracting a control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17005081A JPS5871737A (en) | 1981-10-26 | 1981-10-26 | Transmitting system of control signal for communication of suppressed carrier wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17005081A JPS5871737A (en) | 1981-10-26 | 1981-10-26 | Transmitting system of control signal for communication of suppressed carrier wave |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5871737A JPS5871737A (en) | 1983-04-28 |
| JPS6333824B2 true JPS6333824B2 (en) | 1988-07-07 |
Family
ID=15897685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17005081A Granted JPS5871737A (en) | 1981-10-26 | 1981-10-26 | Transmitting system of control signal for communication of suppressed carrier wave |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5871737A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100407050C (en) | 2001-11-28 | 2008-07-30 | 富士胶片株式会社 | Equipment and method for producing photo film |
| JP4901497B2 (en) * | 2007-01-19 | 2012-03-21 | 株式会社東芝 | Communication system, transmitter, receiver, communication method, transmitter detection method, communication procedure setting method |
| JP5085499B2 (en) * | 2008-10-10 | 2012-11-28 | 株式会社東芝 | Wireless communication method, system, wireless transmitter and wireless receiver |
-
1981
- 1981-10-26 JP JP17005081A patent/JPS5871737A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5871737A (en) | 1983-04-28 |
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