JPS63114330A - Privacy communication equipment - Google Patents
Privacy communication equipmentInfo
- Publication number
- JPS63114330A JPS63114330A JP25918086A JP25918086A JPS63114330A JP S63114330 A JPS63114330 A JP S63114330A JP 25918086 A JP25918086 A JP 25918086A JP 25918086 A JP25918086 A JP 25918086A JP S63114330 A JPS63114330 A JP S63114330A
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- Prior art keywords
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- frequency
- reference signal
- circuit
- secret
- Prior art date
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 34
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- 238000000034 method Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 14
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 13
- 230000010355 oscillation Effects 0.000 description 13
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 8
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Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は搬送波除去単側帯波変調方式による無線通信装
置（以下ＳＳＢ通信装置とする）に用いる周波数変換手
段による秘話装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a privacy device using a frequency conversion means used in a wireless communication device (hereinafter referred to as an SSB communication device) based on a carrier removal single sideband modulation method.
（従来の技術）
ＳＳＢ通信装置に用いる秘話装置は送信側で音声信号を
時系列ごとに法則性をもたせて周波数変換する変換方法
、あるいは、時系列の入れ換えと周波数変換を併用して
法則性をもたせ変換する方法（この２つの変換方法を周
波数変換方式という）によって変換した信号を送出し、
受信側では送信側の法則性に従って逆変換を行い音声信
号を復元する手段がとられている。(Prior art) The confidential communication device used in SSB communication equipment uses a conversion method in which frequency conversion is performed on the transmitting side by imparting regularity to the audio signal for each time series, or a conversion method in which regularity is achieved by combining time series swapping and frequency conversion. Sends a signal converted by a method of converting (these two conversion methods are called frequency conversion method),
On the receiving side, means are taken to restore the audio signal by performing inverse conversion according to the rules on the transmitting side.
（発明が解決しようとする問題点）
このような周波数変換方式による秘話装置を用いたＳＳ
Ｂ通信装置による通話を行った場合、送信側と受信側と
に周波数偏差があるときは、受信側で逆変換を行った音
声信号はこの周波数偏差による影響によって解読困難あ
るいは解読不能となる。これを第６図〜第９図によって
説明する。(Problems to be solved by the invention) SS using a confidential communication device using such a frequency conversion method
When a telephone conversation is made using the B communication device, if there is a frequency deviation between the transmitting side and the receiving side, the voice signal that has been inversely converted on the receiving side becomes difficult or impossible to decipher due to the influence of this frequency deviation. This will be explained with reference to FIGS. 6 to 9.
第６図は送信側での秘話装置の入力音声信号であり周波
数変換前のデータ配列を示すもので、横軸は周波数分布
、縦軸はレベルをあられす。周波数軸のデータを図のよ
うに１．２．３．４．５．６．７．８とする。この周波
数軸のデータとレベルを１→３．２→４．５→７．６→
８という法則で周波数変換を行うと第７図のようなデー
タ配列となる。送信側の秘話装置ではこのように周波数
変換を行い暗号化された送信秘話信号を変調信号として
出力しＳＳＢ通信装置によって送信する。FIG. 6 shows the input audio signal of the confidential communication device on the transmitting side, and shows the data array before frequency conversion, with the horizontal axis representing the frequency distribution and the vertical axis representing the level. Let the frequency axis data be 1.2.3.4.5.6.7.8 as shown in the figure. Change the data and level of this frequency axis from 1 → 3.2 → 4.5 → 7.6 →
If frequency conversion is performed using the rule of 8, a data array as shown in FIG. 7 will be obtained. The secret communication device on the transmitting side performs frequency conversion in this way and outputs the encrypted transmission secret signal as a modulated signal, which is then transmitted by the SSB communication device.
受信側のＳＳＢ通信装置では暗号化された変調信号を検
波し復調信号として受信側の秘話装置に出力する。とこ
ろでＳＳＢ通信装置からは搬送波が送信されないため送
信側の変調信号と受信側の復調信号の間で周波数偏差を
生ずることがあり、この偏差がΔｆであったとき受信側
の復調信号の周波数分布とレベルは第７図のように周波
数偏差Δｆだけ図の横軸に偏位した３゛、４゛、１゛、
２′、７゛、８゛、５゛、６゛のような周波数分布とレ
ベルになる。The SSB communication device on the receiving side detects the encrypted modulated signal and outputs it as a demodulated signal to the private communication device on the receiving side. By the way, since a carrier wave is not transmitted from the SSB communication device, a frequency deviation may occur between the modulated signal on the transmitting side and the demodulated signal on the receiving side, and when this deviation is Δf, the frequency distribution of the demodulated signal on the receiving side As shown in Figure 7, the levels are 3゛, 4゛, 1゛, which are offset from the horizontal axis of the diagram by the frequency deviation Δf.
The frequency distribution and level will be 2', 7', 8', 5', and 6'.
受信側の秘話装置でこの復調信号を送信側の周波数変換
とは逆の法則によって変換すると第９図のように１′、
２゛、３゛、４゛、５゛、６′、７１．８゛、９゛のよ
うになり、第６図の周波数分布とレベルとは異った配列
となり、送信側の元の入力音声信号の復元はできないこ
とになる。When this demodulated signal is converted by the receiver's confidential communication device using the opposite law to the transmitter's frequency conversion, it becomes 1', as shown in Figure 9.
2゛, 3゛, 4゛, 5゛, 6', 71.8゛, 9゛, which is a different arrangement from the frequency distribution and level in Figure 6, and the original input audio on the transmitting side This means that the signal cannot be restored.
送信側と受信側の周波数偏差を補正する手段として、Ｓ
ＳＢ通信装置にはタラリファイヤーなどの周波数偏差補
正手段が設けられているが、周波数変換方式による秘話
装置を用いたときは補正用の信号も周波数変換を受ける
ため補正繰作は困難であり、また、補正操作時は秘話装
置によって周波数変換手段をとったとしても、周波数偏
差がＳＳＢ通信装置の電源投入後に経時変化するものが
あり、特に、通信の相手方が複数であるときは、その相
手方によってもそれぞれ周波数偏差が異り、補正のため
の繰作が煩雑となる。As a means of correcting the frequency deviation between the transmitting side and the receiving side, S
SB communication equipment is equipped with a frequency deviation correction means such as a tallifier, but when using a secret communication device using a frequency conversion method, the correction signal is also subjected to frequency conversion, making it difficult to perform correction operations. Even if a frequency conversion means is used by a confidential communication device during correction operation, the frequency deviation may change over time after the SSB communication device is powered on, and especially when there are multiple communication partners, the frequency deviation may change depending on the other party. Each frequency deviation is different, and the correction procedure becomes complicated.
本発明はＳＳＢ通信装置の周波数偏差が経時的に変化す
る場合および通信の相手方が複数であることによりそれ
ぞれ異る周波数偏移をもつ場合であってもＳＳＢ通信装
置の補正振作を必要とせず、復元した音声信号が周波数
偏差の影響を受けない秘話装置を提供しようとするもの
である。The present invention does not require corrective motion of the SSB communication device even when the frequency deviation of the SSB communication device changes over time or when there are multiple communication partners, each having a different frequency deviation. The present invention aims to provide a confidential communication device in which the restored audio signal is not affected by frequency deviation.
（問題を解決するための手段）
本発明の原理図を第１図、第２図に示す。以下図によっ
て説明する。第１図は秘話装置の送信側のブロック図で
あり、マイク回路１で通信音を電気信号に変換して音声
信号ＩＡとして出力する。(Means for solving the problem) The principle diagram of the present invention is shown in FIGS. 1 and 2. This will be explained below using figures. FIG. 1 is a block diagram of the transmission side of the confidential communication device, in which a microphone circuit 1 converts communication sound into an electrical signal and outputs it as an audio signal IA.
この音声信号ＩＡ中の必要な周波数帯域幅の成分のみを
音声信号ろ波回路（以下音声Ｂ−Ｐ−Ｆとする）２で通
過させて帯域信号２Ａとして出力する。この帯域信号２
Ａを変換回路１１で法則回路５からの出力である法則信
号５Ａに従って周波数変換を行い暗号化された送信秘話
信号４Ａを出力する。基準信号発生回路６では送信秘話
信号４Ａの周波数帯幅の領域外であってＳＳＢ通信装置
の通信周波数幅内にある特定の周波数を基準信号ｆｏと
して発生し、付加回路７でこの基準信号ｆｏと送信秘話
信号４Ａを同時に出力する。変調帯域ろ波回路９（以下
変調Ｂ−Ｐ−Ｆとする）ではＳＳＢ通信装置の有する通
信周波数帯幅を゛有しその池の不要波成分を除去して変
調信号９Ａを出力する。この変調信号９ＡをＳＳＢ通信
装置によって無線周波数として送信する。Only the components of the necessary frequency bandwidth in this audio signal IA are passed through an audio signal filtering circuit (hereinafter referred to as audio B-P-F) 2 and output as a band signal 2A. This band signal 2
A is frequency-converted by a conversion circuit 11 according to a law signal 5A output from a law circuit 5, and an encrypted transmission secret signal 4A is output. The reference signal generation circuit 6 generates a specific frequency outside the frequency band of the transmitted confidential signal 4A and within the communication frequency width of the SSB communication device as the reference signal fo, and the additional circuit 7 generates a reference signal fo. A secret transmission signal 4A is output at the same time. A modulation band filter circuit 9 (hereinafter referred to as modulation B-P-F) has a communication frequency bandwidth possessed by the SSB communication device, removes unnecessary wave components therein, and outputs a modulated signal 9A. This modulated signal 9A is transmitted as a radio frequency by the SSB communication device.
第２図は秘話装置の受信側のブロック図である。FIG. 2 is a block diagram of the reception side of the private communication device.
ＳＳＢ通信装置によって受信された電波は検波・復調さ
れ、秘話装置に復調信号３１として入力される。この復
調信号３１は変調信号９Ａに対して周波数偏差６１分だ
け偏移している。Radio waves received by the SSB communication device are detected and demodulated, and input as a demodulated signal 31 to the private communication device. This demodulated signal 31 is shifted by a frequency deviation of 61 with respect to the modulated signal 9A.
変調Ｂ−Ｐ−Ｆ３１は送信側変調Ｂ−Ｐ−Ｆ９と同じも
のであり、不要波を除去し変調信号３２Ａを出力する。The modulation B-P-F 31 is the same as the transmitting side modulation B-P-F 9, and removes unnecessary waves and outputs a modulated signal 32A.
周波数制御ｎ１２は送信側で付加した基準信号「０を中
心周波数とする周波数偏差Δｆを検出してこの偏差分Δ
ｆによる影響を除去した受信秘話信号４２Ａを出力する
。法則回路４４と変換回路１３によって送信側とは逆の
法則信号４４Ａによって周波数変換を行い、暗号化され
た信号を復元した帯域信号４５Ａを出力する。音声Ｂ−
Ｐ−Ｆ４６は送信側の音声Ｂ−Ｐ−Ｆと同一のもので不
要周波数成分を除去し、受信音声信号４６Ａを出力する
。スピーカー回路４７は受信音声信号４６を電気信号か
ら（作 用）
送信側の秘話装置において、送信秘話信号の周波数幅外
の周波数に設定した基準信号を附加して送信秘話信号と
ともに変調信号としてＳＳＢ通信装置によって送信し、
受信側の秘話装置では、既知の周波数である基準信号と
受信信号中に含まれる送信側の基準信号の周波数偏差量
を周波数制御回路で検出して、その周波数偏差量だけ受
信秘話信号の周波数を偏移させることにより、ＳＳＢ通
、信装置によって生じる周波数偏差の影響を除去するこ
とができることになる。Frequency control n12 detects the frequency deviation Δf with the center frequency of the reference signal “0” added on the transmitting side, and calculates this deviation Δ.
A received secret signal 42A from which the influence of f has been removed is output. The law circuit 44 and the conversion circuit 13 perform frequency conversion using a law signal 44A opposite to that on the transmitting side, and output a band signal 45A that is a restored encrypted signal. Audio B-
The P-F 46 is the same as the audio B-P-F on the transmitting side, removes unnecessary frequency components, and outputs the received audio signal 46A. The speaker circuit 47 converts the received audio signal 46 from an electrical signal (operation). In the transmitter's confidential communication device, a reference signal set to a frequency outside the frequency range of the transmitted confidential signal is added, and the signal is converted into a modulated signal together with the transmitted confidential signal for SSB communication. transmitted by the device;
In the receiver's encrypted communication device, a frequency control circuit detects the frequency deviation between the reference signal, which is a known frequency, and the transmitter's reference signal included in the received signal, and changes the frequency of the received encrypted signal by the detected frequency deviation. By shifting, it is possible to eliminate the influence of frequency deviations caused by SSB communications and communication equipment.
（実 施 例）
第３図・第４図は本発明の実施例を示す図であり、第１
図、第２図と同一のものは符号も同一のものを用いる。(Example) Figures 3 and 4 are diagrams showing examples of the present invention.
The same reference numerals are used for the same parts as in FIG.
第３図は送信側の秘話装置のブロック図であり、第４図
は受信側のブロック図である。FIG. 3 is a block diagram of the secret communication device on the transmitting side, and FIG. 4 is a block diagram of the receiving side.
第３図において、マイク回路１はマイクロフォンであり
通話音を電気信号に変換して送信音声信号ＩＡとして出
力し、ＳＳＢ通信装置がシンプレックス方式であるとき
は、ＳＳＢ通信装置の送信・受信状態を制御する制御手
段（図示せず）をもつ。In FIG. 3, the microphone circuit 1 is a microphone that converts the call sound into an electrical signal and outputs it as a transmission audio signal IA, and when the SSB communication device is of the simplex method, controls the transmission/reception status of the SSB communication device. It has control means (not shown) to
音声Ｂ−Ｐ−Ｆ２は特定の通過周波数帯域をもつ帯域ろ
波回路であり、オペアンプなどによるアクティブフィル
ターで構成される。ＳＳＢ通信装置において音声情報を
伝達するための周波数帯域は０．３ＫＨ２〜３ ＫＨ２
であればよいのであるが、基準信号「０を付加するため
音声Ｂ−Ｐ−Ｆ２の通過帯域周波数は０．４Ｋ）１２！
〜３ ＫＨ２に選定し、それ以外の不要成分を除去し帯
域信号２Ａとして出力する。The audio B-P-F2 is a bandpass filter circuit having a specific pass frequency band, and is composed of an active filter using an operational amplifier or the like. The frequency band for transmitting voice information in SSB communication equipment is 0.3 KH2 to 3 KH2
However, the passband frequency of the audio B-P-F2 is 0.4K because the reference signal ``0'' is added) 12!
~3 KH2, remove other unnecessary components, and output as a band signal 2A.
時間・周波数変換回路３では入力した帯域信号２Ａを音
声Ｂ−Ｐ−Ｆ２の最高通過周波数の約２〜３倍の周波数
でサンプリングしＡ／Ｄ変換をした後、時間領域データ
列を周波数領域データ列に、例えば７−リエ変換などの
手法を用いて、帯域信号の全周波が含まれる周波数幅を
帯域信号の周波数の幅に限定した周波数領域データ列に
変換する。The time-frequency conversion circuit 3 samples the input band signal 2A at a frequency approximately 2 to 3 times the highest passing frequency of the audio B-P-F 2, performs A/D conversion, and converts the time-domain data string into frequency-domain data. The frequency domain data string is converted into a frequency domain data string in which the frequency width including all frequencies of the band signal is limited to the frequency width of the band signal using a technique such as the 7-lier transform.
このデータ列はこの時点では周波数の低い順に並んでい
るが、配列変換回路４で法則面′＃１５の法則信号５Ａ
に従って並び換え暗号化された秘話信号４Ａを出力する
。At this point, this data string is arranged in descending order of frequency, but in the array conversion circuit 4, the law signal 5A of law surface '#15 is processed.
The secret signal 4A is rearranged and encrypted according to the following.
基準信号発生回路６では基準信号ｆｏを発生する。A reference signal generation circuit 6 generates a reference signal fo.
この基準信号ｆｏの周波数は送信秘話信号４Ａ周波数幅
外の領域とし、かつ、ＳＳＢ通信装置による周波数偏差
Δｆの最大値（±５０１１２程度）によって偏移を受け
たとしても送信秘話信号４Ａの周波数幅内に偏移しない
程度であってＳＳＢ通信装置の通信周波数幅内に選定す
る。本実施例では基準信号ｆｏを２００ ＨＺとする。The frequency of this reference signal fo is in a region outside the frequency width of the transmitted confidential signal 4A, and even if it is shifted by the maximum value of the frequency deviation Δf (approximately ±50112) due to the SSB communication device, the frequency width of the transmitted confidential signal 4A is The frequency should be selected within the communication frequency width of the SSB communication device and within the communication frequency width of the SSB communication device. In this embodiment, the reference signal fo is set to 200 Hz.
この基準信号ｆｏは安定性をもたせるため、水晶振動子
によって発振したものを分周して得る。In order to provide stability, this reference signal fo is obtained by frequency-dividing the signal oscillated by a crystal resonator.
基準信号ｆｏは、例えば、ＯＲゲートなどに上って構成
した付加回路７によって送信秘話信号４Ａに付加する。The reference signal fo is added to the transmitted secret signal 4A by an additional circuit 7 configured by, for example, an OR gate.
次に周波数領域データ列を時間領域データ列に周波数時
間変換回路８で変換して、変調Ｂ−Ｐ−Ｆ９へ出力する
。Next, the frequency-domain data string is converted into a time-domain data string by a frequency-time conversion circuit 8 and output to the modulation B-P-F 9.
変調Ｂ−Ｐ−Ｆ９は音声Ｂ−Ｐ−Ｆ２と同様の素子で構
成するが、通過帯域幅は基準信号ｆｏとｆ。The modulation B-P-F9 is composed of the same elements as the audio B-P-F2, but the passband width is the same as that of the reference signals fo and f.
を中心とする最大周波数偏差Δｆｍの通過帯酸分、つま
り、ｔｏ±Δｆｍを通過させる分だけ音声Ｂ−Ｐ・Ｆ２
より広くする。本実施例では０．１５ＫｌｌＺ〜３ＫＨ
２とする。変ｍＢ−Ｐ−Ｆ９の出力である変調信号９Ａ
はＳＳＢ通信装置１０の変調信号入力部に接続されて秘
話性のあるＳＳＢ電波として送信される。The maximum frequency deviation Δfm centering on the pass band, that is, the audio B-P・F2 by the amount that passes to±Δfm.
Make it wider. In this example, 0.15KllZ to 3KH
Set it to 2. Modulated signal 9A which is the output of variable mB-P-F9
is connected to the modulated signal input section of the SSB communication device 10 and transmitted as a confidential SSB radio wave.
受信側では第４図に示すようにＳＳＢ通信装置３１に上
って検波して衣調された復調信号３１Ａを受信側秘話装
置の変調Ｂ−Ｐ−Ｆ３２に入力する。この復調信号３１
ＡはＳＳＢ通信装置の送信側と受信側とで周波数偏差Δ
ｆの偏移を受けているものとする。On the receiving side, as shown in FIG. 4, a demodulated signal 31A which has been detected and modulated by the SSB communication device 31 is inputted to the modulation B-P-F 32 of the receiving side private communication device. This demodulated signal 31
A is the frequency deviation Δ between the transmitting side and the receiving side of the SSB communication device.
It is assumed that a deviation of f is applied.
変調Ｂ−Ｐ−Ｆ３２は送信側で用いた変調Ｂ−Ｐ・Ｆ９
と同じ特性および構成とした帯域ろ波回路であり、不要
波成分を除去して変調信号３２Ａを出力する。Modulation B-P-F32 is modulation B-P・F9 used on the transmitting side
This is a bandpass filter circuit having the same characteristics and configuration as , and outputs a modulated signal 32A by removing unnecessary wave components.
第１混合回路３３は局部発振回路３４の局部発振周波数
ｒ１と変調信号３２Ａとを混合して高周波の混合信号３
３Ａを得る。この混合信号３３Ａは局部発振周波数ｆ１
を中心として変調信号３２Ａの周波数だけ上下の周波数
を基本成分とする周波数成分をもつ。高周波Ｂ−Ｐ−Ｆ
３５は局部発振周波数ｆ１より変調信号３２Ａ分だけ高
い周波数成分のみをと９だし、その池の不要波を除去す
るろ波回路である。The first mixing circuit 33 mixes the local oscillation frequency r1 of the local oscillation circuit 34 and the modulation signal 32A to generate a high frequency mixed signal 3.
Get 3A. This mixed signal 33A has a local oscillation frequency f1
It has a frequency component whose basic component is a frequency above and below by the frequency of the modulation signal 32A with the center at . High frequency B-P-F
Reference numeral 35 denotes a filter circuit that extracts only the frequency component 9 that is higher than the local oscillation frequency f1 by the amount of the modulation signal 32A, and removes unnecessary waves in the filter.
このように変調信号３２Ａを一旦高い周波数にすること
によって、周波数偏差Δ「を抽出してこの成分を除去す
るための回路、つまり周波数制御部の構成を簡単にし、
しかも安定な作動とすることができる。By temporarily increasing the frequency of the modulation signal 32A in this way, the configuration of the circuit for extracting the frequency deviation Δ' and removing this component, that is, the frequency control section, is simplified.
Moreover, stable operation can be achieved.
修正制御回路３６、基準信号検出回路（以下検出Ｂ−Ｐ
−Ｆとする）、位相比較回路３８、受信基準信号回路３
９、電圧制御発振回路（以下■ＣＯとする）４０１無信
号検出回路５０は周波数制御部を構成する。ＶＣＯ・４
０は局部発振周波ｌｆｌを中心として位相比較回路３８
から出力される制御信号３８Ａによって周波数が変化す
るｖＣＯ周波数ｆ２を出力する発振回路である。検出Ｂ
−Ｐ−Ｆ３７は基準信号ｆｏを中心として（±Δｆｍ）
の帯域幅をもつる波回路である。受信基準信号回路３９
は基準信号ｆｏと等しい周波数の受信基準信号ｒｐを出
力する発振回路であり、位相比較回路３８で検出Ｂ−Ｐ
−Ｆ３７の出力周波数との位相比較を行う。検出Ｂ−Ｐ
−Ｆの出力信号とｆｐとの位相が等しいとき、位相比較
回路３８の制御信号３８Ａ（！ＶＯを出力し、このとき
ｖＣＯ・４０は局部発振周波数ｆ１と等しい周波数をＦ
２として出力する。検出Ｂ−Ｐ−Ｆの出力が（ｆｏ＋Δ
ｆ）のとき、つまり、周波数偏差が（＋Δ「）のときは
制御信号３８Ａは（ｖＯ＋ΔＶ）となり、ＶＣｏ・４０
はＦ２として（ｆｌ−Δｆ）を発振することにより、修
正制御回路３６の出力は周波数偏差（＋Δｆ）による偏
移が除去されたものとなる。周波数偏差が（−Δｆ）で
あるときは（＋Δｆ）のときの逆の作動をする。Correction control circuit 36, reference signal detection circuit (hereinafter referred to as detection B-P)
-F), phase comparator circuit 38, reception reference signal circuit 3
9. Voltage controlled oscillation circuit (hereinafter referred to as ■CO) 401 No signal detection circuit 50 constitutes a frequency control section. VCO・4
0 is the phase comparator circuit 38 centered on the local oscillation frequency lfl.
This is an oscillation circuit that outputs a vCO frequency f2 whose frequency changes depending on the control signal 38A output from the oscillation circuit. Detection B
-P-F37 is centered around the reference signal fo (±Δfm)
It is a wave circuit with a bandwidth of . Reception reference signal circuit 39
is an oscillation circuit that outputs a reception reference signal rp having the same frequency as the reference signal fo, and the phase comparison circuit 38 detects B-P.
-Compare the phase with the output frequency of F37. Detection B-P
- When the phase of the output signal of -F and fp are equal, the control signal 38A (!VO) of the phase comparator circuit 38 is output, and at this time, vCO.40 outputs a frequency equal to the local oscillation frequency f1.
Output as 2. The output of detection B-P-F is (fo+Δ
f), that is, when the frequency deviation is (+Δ''), the control signal 38A becomes (vO+ΔV), and VCo・40
By oscillating (fl-Δf) as F2, the output of the correction control circuit 36 has the deviation due to the frequency deviation (+Δf) removed. When the frequency deviation is (-Δf), the operation is opposite to that when the frequency deviation is (+Δf).
また、検出Ｂ−Ｐ−Ｆ３７と基準信号発生回路３９の両
出力を入力する無信号検出回路５０は、検出Ｂ・Ｐ−Ｆ
３７からの出力がないとき、すなわち周波数偏差Δｆが
（±へｆａｎ）を超える偏移であるとき、または、基準
信号ｆｏが受信されないときはｖＣｏ・４０の発振周波
数を保持するための回路である。Further, a no-signal detection circuit 50 inputting both outputs of the detection B-P-F 37 and the reference signal generation circuit 39 has a detection B-P-F
This is a circuit for holding the oscillation frequency of vCo·40 when there is no output from 37, that is, when the frequency deviation Δf exceeds (±to fan), or when the reference signal fo is not received. .
無信号検出回路５０は本装置を起動後、最初の基準検出
Ｂ−Ｐ−Ｆの出力が入力するまで、位相比較回路３８の
制御信号３８ＡをＶｏに保つ信号を出力し、基準検出Ｂ
−Ｐ−Ｆの入力があった後に無信号となったと艶は、無
信号となる直前の位相比較回路３８の制御信号３８Ａを
（Ｖｏ±Δ■）に保持する信号を位相比較回路３８に与
える。After starting this device, the no-signal detection circuit 50 outputs a signal that keeps the control signal 38A of the phase comparison circuit 38 at Vo until the output of the first reference detection B-P-F is input, and
-When there is no signal after the P-F input, a signal is given to the phase comparator circuit 38 to maintain the control signal 38A of the phase comparator circuit 38 at (Vo±Δ■) immediately before the no signal is generated. .
（１歪制御回路３６の出力の一部は、また音声Ｂ・Ｐ−
Ｆ４１の入力として与える。音声Ｂ−Ｐ−Ｆ４１は送信
側で用いた音声Ｂ−Ｐ−Ｆと同様の特性と構成として、
修正制御回路３６で生ずる不要周波数成分や基準信号ｆ
ｏを除去する。(Part of the output of the 1 distortion control circuit 36 is also the audio B/P-
Give as input to F41. The audio B-P-F41 has the same characteristics and configuration as the audio B-P-F used on the transmitting side.
Unnecessary frequency components and reference signal f generated in the correction control circuit 36
Remove o.
以降は送信側とは逆の処理を行えばよい。すなわち、時
間・周波数変換回路４２で周波数データ列を得る。次の
配列変換回路４３で法則回路４４の法則信号４４Ａによ
って送信側とは逆の配列変換を行い、受信秘話信号４５
Ａを得て次に周波数・時間変換回路４５で、周波数デー
タ列を時間データ列に変換することによって送信側で送
出した元の帯域信号４５Ａが得られるにの帯域信号４５
Ａを送信側の音声Ｂ−Ｐ−Ｆ２と同一の特性と構成をも
つ音声Ｂ・Ｐ−Ｆ４６を通過させることにより、不要波
成分が除去された受信音声信号４６Ａを得る。この受信
音声信号４６Ａは周波数制御部で周波数偏差Δｆによる
ＦＡ３９が除去されているので、スピーカー回路４７を
駆動することによってもとの通話内容を忠実に再生する
ことができる。From then on, the process on the sending side can be reversed. That is, the time/frequency conversion circuit 42 obtains a frequency data string. The next array conversion circuit 43 performs an array conversion opposite to that on the transmitting side using the law signal 44A of the law circuit 44, and the received confidential message 45
After obtaining A, the frequency/time conversion circuit 45 converts the frequency data string into a time data string to obtain the original band signal 45A sent out on the transmitting side.
By passing A through a voice B-P-F 46 having the same characteristics and configuration as the voice B-P-F2 on the transmitting side, a received voice signal 46A from which unnecessary wave components have been removed is obtained. Since the received audio signal 46A has the FA 39 caused by the frequency deviation Δf removed by the frequency control section, by driving the speaker circuit 47, the original content of the call can be faithfully reproduced.
以上の実施例においては、送信側と受信側とを別々のも
のとしたが、ＳＳＢ通信装置が送信・受信機能が一体で
構成され、シンプレックス通話方式である場合には本実
施例１こよる秘話装置も送信側と受信側とを一体に構成
する。In the above embodiments, the transmitting side and the receiving side are separate; however, if the SSB communication device has the transmitting and receiving functions integrated and uses a simplex communication system, this embodiment The device also has a transmitting side and a receiving side integrated.
また、このように一体に構成した場合、送信側・受信側
の音声Ｂ−Ｐ−Ｆ２と４６、時間・周波数変換回路３と
４２、配列変換回路４と４３、周波数・時間変換回路８
と４５、変調Ｂ−Ｐ−Ｆ９と３２、基準信号発生回路６
と３９は同しものでよいため、各回路を１回路ずつの構
成とし、ＳＳＢ通信装置の送信・受信に応じて切換え使
用する構成とすることができる。In addition, in the case of an integrated configuration like this, the audio B-P-Fs 2 and 46 on the transmitting side and receiving side, the time/frequency conversion circuits 3 and 42, the array conversion circuits 4 and 43, and the frequency/time conversion circuit 8
and 45, modulation B-P-F9 and 32, reference signal generation circuit 6
and 39 may be the same, so each circuit can be configured to have one circuit, and can be switched and used depending on the transmission/reception of the SSB communication device.
（変形実施例） 本発明は次のような変形実施ができる。(Modification example) The present invention can be implemented in the following modifications.
（１）前記実施例では基準信号ｆｏを０．２ＫＨ２と送
信秘話信号４Ａの低領域側にしたが、高領域側の例えば
２．９Ｋ１１２としてもよい。このときは音声Ｂ・Ｐ−
Ｆ２．４．４６のそれぞれの通過帯域幅を０．３ＫＨ２
〜２．７ＫＨ２、変調Ｂ −Ｐ −Ｆノ通過帯域幅ヲ０
．３ＫＩＩＺ〜３．０ＫＩＩＺとする。このとき音声信
号の高領域側はカットされるが、通話音の内容が損なわ
れることはない。(1) In the above embodiment, the reference signal fo is set to 0.2KH2, which is in the low range of the transmitted confidential signal 4A, but it may be set to the high range, for example, 2.9K112. At this time, the audio B・P−
Each passband width of F2.4.46 is 0.3KH2
~2.7KH2, modulation B-P-F passband width 0
．． 3KIIZ to 3.0KIIZ. At this time, the high range side of the audio signal is cut, but the content of the call sound is not impaired.
（２） 第３図に破線で示す上うに送信側に信号判断回
路２０、遅延回路２１を設ける。信号判断回路２０はコ
ンパレーターなどを用いて基準レベルを雑音レベルより
高く設定して、帯域信号２Ａが入力されている間だけ基
準信号発生回路６を動作させる信号を出力する。遅延回
路２１では、帯域信号２Ａを数１０ミリ秒程度遅延させ
、受信側において、周波数制御部で生じる位相比較動作
の時間遅れによって、通話内容の冒頭がとぎれないよう
にする。(2) A signal judgment circuit 20 and a delay circuit 21 are provided on the transmitting side as indicated by broken lines in FIG. The signal determination circuit 20 uses a comparator or the like to set the reference level higher than the noise level, and outputs a signal that operates the reference signal generation circuit 6 only while the band signal 2A is input. The delay circuit 21 delays the band signal 2A by several tens of milliseconds to prevent the beginning of the conversation from being interrupted on the receiving side due to the time delay in the phase comparison operation caused by the frequency control section.
（３）前記変形実施例（２）において、信号判断回路２
０の出力を帯域信号２Ａが入力された冒頭の短時間だけ
出力させる。この出力時間を前記変形実施例の遅延回路
２１の遅延時間と同じ程度とする。(3) In the modified embodiment (2), the signal judgment circuit 2
The output of 0 is output only for a short time at the beginning when the band signal 2A is input. This output time is approximately the same as the delay time of the delay circuit 21 of the modified embodiment.
この場合はＳＳＢ通信方式の省電力送信の特長を充分生
かすことができる。In this case, the power-saving transmission feature of the SSB communication method can be fully utilized.
（４） ＳＳＢ通信装置がシンプレックス通話方式で
あるときは、ＳＳＢ通信装置の送信・受信切換制御信号
を前記変形実施例の（２）（３）の信号判断回路２０の
入力とし、（２）の実施例のときは送信中、または、（
３）の実施例にあっては送信開始の短時間だけ基準信号
ｆｏを送出する。(4) When the SSB communication device is a simplex call system, the transmission/reception switching control signal of the SSB communication device is input to the signal judgment circuit 20 in (2) and (3) of the modified embodiment, and In the example, it is sending, or (
In the embodiment 3), the reference signal fo is sent out only for a short time at the start of transmission.
（５）第５図はＳＳＢ通信装置がシンブレツク久通信方
式であるときの他の実施例の要部ブロック図であり、信
号判断回路２０に帯域信号２ＡとＳＳＢ通信装置から送
信・受信切換制御信号を入力し、基準信号発生回路６に
信号判断出力２０Ａを与える。このとぎはＳＳＢ通信装
置のマイクロフォンに設けられｔこマイクボタンなどを
押すことにより、送信・受信切換信号が入力し、信号判
断回路２０は基準信号発生回路６を動作させる信号を出
力するが、帯域信号２Ａが入力したと外は不動作信号を
出力する。信号判断回路２０は、入力の送信・受信切換
信号が入力後に帯域信号２Ａがあった時だけ、基準信号
発生回路６を動作させる信号を出力するように条件判断
も行わせる。これによりマイクボタンを押した始端時の
み基準信号ｆｏを送信する。(5) FIG. 5 is a block diagram of main parts of another embodiment when the SSB communication device uses the single-break communication method, and the signal judgment circuit 20 receives the band signal 2A and the transmission/reception switching control signal from the SSB communication device. is input, and a signal judgment output 20A is given to the reference signal generation circuit 6. This switch is provided on the microphone of the SSB communication device, and by pressing the microphone button or the like, a transmission/reception switching signal is input, and the signal judgment circuit 20 outputs a signal that operates the reference signal generation circuit 6. When signal 2A is input, the outside outputs a non-operation signal. The signal determination circuit 20 also performs condition determination so as to output a signal for operating the reference signal generation circuit 6 only when the band signal 2A is present after the input transmission/reception switching signal is input. As a result, the reference signal fo is transmitted only at the beginning when the microphone button is pressed.
（６）受信側において、ＳＳＢ通信装置の申開周波出力
を直接修正制御回路３６の入力とする。このとき、ｖＣ
Ｏ周波数ｆ２はＳＳＢ通信装置の中間周波数±Δ「を出
力するようにする。このようにしたときは、秘話装置の
受信側での変調Ｂ−Ｐ・Ｆ３２、第１混合回路３３、局
部発振回路３４、高周波Ｂ−Ｐ−Ｆ３５は不要である。(6) On the receiving side, the open frequency output of the SSB communication device is directly input to the correction control circuit 36. At this time, vC
The O frequency f2 is set to output the intermediate frequency ±Δ of the SSB communication device. When this is done, the modulation B-P・F 32, the first mixing circuit 33, and the local oscillation circuit on the reception side of the private communication device 34, high frequency B-P-F 35 is unnecessary.
（発明の効果）
以上のように、本発明は送信側の秘話装置において基準
信号を付加して送信し、受信側でこの基準信号によって
、送信側と受信側の周波数偏差を補正するため、煩雑な
操作が不要であり、ことに通信の相手方が多数の場合で
あっても周波数偏差の影響を受けない安定な秘話通信装
置を提供できるという特長がある。(Effects of the Invention) As described above, the present invention adds a reference signal to the transmitted data in the secret communication device on the transmitting side, and uses this reference signal on the receiving side to correct the frequency deviation between the transmitting side and the receiving side. The present invention has the advantage of providing a stable confidential communication device that does not require any manual operation and is not affected by frequency deviation even when there are many communication partners.
第１図・第２図は本発明の原理を示すブロック図、第３
図・第４図は実施例を示すブロック図、第５図は池の１
つの実施例の要部ブロック図、第６図〜第９図は周波数
分布図である。
ＩＡ ：送信音声信号 ２Ａ：帯域信号４Ａ ：送信秘
話信号 ５Ａ：法則信号ｆｏ：基準信号 ９Ａ：変
調信号
３１Ａ：復調信号 ｆｌ：局部発振信号ｒｐ：受信
基準信号 ３８Ａ：制御信号４４Ａ：法則信号 ４
２Ａ：受信秘話信号４６Ａ：受信音声信号
５’４’ Ｊ’２’７’６’５′６” Ｈ’
２・、・４’５’６’ゲ８゜手続補正書（方式）
昭和６２年 ２月２０ 日Figures 1 and 2 are block diagrams showing the principle of the present invention, and Figure 3 is a block diagram showing the principle of the present invention.
Figure 4 is a block diagram showing the embodiment, Figure 5 is the pond 1
Main part block diagrams of the two embodiments, and FIGS. 6 to 9 are frequency distribution diagrams. IA: Transmission audio signal 2A: Band signal 4A: Transmission confidential signal 5A: Law signal fo: Reference signal 9A: Modulation signal 31A: Demodulation signal fl: Local oscillation signal rp: Reception reference signal 38A: Control signal 44A: Law signal 4
2A: Received confidential message signal 46A: Received audio signal 5'4'J'2'7'6'5'6''H'
2.,・4'5'6'ge8゜Procedural amendment (method) February 20, 1988
Claims (1)
て送信秘話信号を作り、この秘話信号により限定された
通信周波数帯幅の搬送波抑圧単側波帯送信波を変調して
送信し、この送信波の受信信号を復調して得られる復調
信号を受信秘話信号とし、この受信秘話信号を前記特定
の方法と逆の法則によって周波数変換することにより受
信音声信号を得る秘話装置において、 （ａ）前記送信秘話信号の周波数帯幅を前記通周波数帯
幅よりも僅か狭く設定する秘話信号幅設定手段と、 （ｂ）前記送信秘話信号の周波数帯幅外にあり、かつ、
前記通信周波数幅内にある特定の周波数の信号を基準信
号として発生する基準信号発生手段と、 （ｃ）前記送信秘話信号に前記基準信号を付加した信号
により前記変調を行って前記送信波を得る変調手段と、 （ｄ）前記復調信号から前記送信秘話信号部分を検出し
て前記受信秘話信号として得るとともに前記基準信号を
検出して検出基準信号を得る信号検出手段と、 （ｅ）前記基準信号と同一の周波数の信号を受信基準信
号として発生し、この受信基準信号に対する前記検出基
準信号の位相もしくは周波数の偏差を検出した信号にも
とづいて制御信号を得る制御信号手段と、 （ｆ）前記制御信号により前記受信秘話信号中の前記偏
差に相当する偏差分を除去して前記受信音声信号を得る
修正変換制御手段と を具備することにより前記変調変調から前記復調までの
間に生じた周波数偏差による前記受信音声信号の解読困
難や解読不能を除去し得るようにしたことを特徴とする
秘話装置。[Claims] The frequency of the transmitted audio signal is frequency-converted according to a specific law to create a transmitted secret signal, and the carrier-suppressed single sideband transmission wave of a limited communication frequency band is modulated by this secret signal. and a demodulated signal obtained by demodulating the received signal of the transmitted wave as a received secret speech signal, and a secret speech device that obtains a received voice signal by frequency converting the received secret speech signal according to a law opposite to the specific method. , (a) a confidential signal width setting means for setting the frequency bandwidth of the transmitted confidential signal to be slightly narrower than the pass frequency bandwidth; (b) located outside the frequency band of the transmitted confidential signal, and
a reference signal generating means for generating a signal of a specific frequency within the communication frequency width as a reference signal; (c) performing the modulation with a signal obtained by adding the reference signal to the transmission secret signal to obtain the transmission wave; modulating means; (d) signal detection means for detecting the transmitted secret signal part from the demodulated signal to obtain the received secret signal and detecting the reference signal to obtain a detection reference signal; (e) the reference signal. (f) control signal means for generating a signal having the same frequency as a reception reference signal as a reception reference signal and obtaining a control signal based on a signal that detects a phase or frequency deviation of the detection reference signal with respect to the reception reference signal; and a correction conversion control means for obtaining the received audio signal by removing a deviation corresponding to the deviation in the received secret speech signal, so that the frequency deviation generated between the modulation modulation and the demodulation is corrected. A confidential communication device, characterized in that it is possible to eliminate difficulty or inability to decipher the received audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25918086A JPS63114330A (en) | 1986-10-30 | 1986-10-30 | Privacy communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25918086A JPS63114330A (en) | 1986-10-30 | 1986-10-30 | Privacy communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63114330A true JPS63114330A (en) | 1988-05-19 |
Family
ID=17330475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25918086A Pending JPS63114330A (en) | 1986-10-30 | 1986-10-30 | Privacy communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63114330A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003244104A (en) * | 2002-02-21 | 2003-08-29 | Ntt Advanced Technology Corp | Method for preventing information reproduction by leakage electromagnetic wave and information devices |
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|---|---|---|---|---|
| JPS51123503A (en) * | 1975-04-21 | 1976-10-28 | Nippon Telegr & Teleph Corp <Ntt> | Secret call system equipped with frequency correction function |
| JPS60210042A (en) * | 1984-04-02 | 1985-10-22 | Japan Radio Co Ltd | Privacy telephone device |
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- 1986-10-30 JP JP25918086A patent/JPS63114330A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51123503A (en) * | 1975-04-21 | 1976-10-28 | Nippon Telegr & Teleph Corp <Ntt> | Secret call system equipped with frequency correction function |
| JPS60210042A (en) * | 1984-04-02 | 1985-10-22 | Japan Radio Co Ltd | Privacy telephone device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003244104A (en) * | 2002-02-21 | 2003-08-29 | Ntt Advanced Technology Corp | Method for preventing information reproduction by leakage electromagnetic wave and information devices |
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