JPH01200844A - System for converting frequency - Google Patents

System for converting frequency

Info

Publication number
JPH01200844A
JPH01200844A JP8825188A JP2518888A JPH01200844A JP H01200844 A JPH01200844 A JP H01200844A JP 8825188 A JP8825188 A JP 8825188A JP 2518888 A JP2518888 A JP 2518888A JP H01200844 A JPH01200844 A JP H01200844A
Authority
JP
Japan
Prior art keywords
frequency
circuit
circuits
variable frequency
variable
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.)
Pending
Application number
JP8825188A
Other languages
Japanese (ja)
Inventor
Hiroshi Kazama
宏志 風間
Kazuhiko Seki
和彦 関
Tatsuro Shomura
正村 達郎
Kimitoshi Funekawa
舟川 公敏
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP8825188A priority Critical patent/JPH01200844A/en
Publication of JPH01200844A publication Critical patent/JPH01200844A/en
Pending legal-status Critical Current

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  • Time-Division Multiplex Systems (AREA)

Abstract

PURPOSE:To reduce the number of frequency oscillating circuits to the number of hopping carriers or below and to decrease a hardware quantity by providing plural variable frequency oscillating circuits to be set at arbitrary frequencies, a frequency control circuit, etc. CONSTITUTION:For each of variable frequency oscillating circuits 11-14, an output frequency is arbitrarily set by the control signal of a frequency control circuit 17, and the signals of output frequencies f1-f4 of the circuits 11-14 are inputted to an oscillator switching circuit 15. Next, the circuit 15 selects one of input signals, and the signal is inputted to a frequency converting circuit 16. The frequency changes of the circuits 11-14 are executed while the circuits 11-14 are not selected by the circuit 15, and the frequency setting and the selection switching of the circuit 15 are controlled in a time slot unit. Thus, since an arbitrary frequency can be outputted and the number of circuits 11-14 can be reduced to the number of hopping carriers or below, the hardware quantity can be decreased.

Description

【発明の詳細な説明】 「産業上の利用分野」 本発明は、複数のタイムスロットに時分割された複数の
周波数を用いて通信する場合のキャリアホッピング方式
に関するものである。
DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a carrier hopping method when communicating using a plurality of frequencies time-divided into a plurality of time slots.

「従来の技術」 従来のキャリアホッピング方式には、第3図に示した周
波数変換部が用いられている。図中1〜4はN個の固定
周波数発振回路、5は選択回路、6は周波数変換回路で
あり、次のようにして周波数変換を行っている。N個の
固定周波数発振回路1〜4の出力周波数f+−fnの信
号は選択回路5に入力され、選択回路5は、それらのN
波の信号のうちl波fiの信号を選択する。この選択さ
れた周波数fiの信号は周波数変換回路6に入力され、
この周波数変換回路6は、IF周波数をf。F。
"Prior Art" The conventional carrier hopping method uses a frequency converter shown in FIG. 3. In the figure, 1 to 4 are N fixed frequency oscillation circuits, 5 is a selection circuit, and 6 is a frequency conversion circuit, which performs frequency conversion in the following manner. The signals of output frequency f+-fn of the N fixed frequency oscillation circuits 1 to 4 are input to the selection circuit 5, and the selection circuit 5
The l-wave fi signal is selected from among the wave signals. This signal of the selected frequency fi is input to the frequency conversion circuit 6,
This frequency conversion circuit 6 converts the IF frequency to f. F.

RF周波数をfRFとして、次式による周波数変換を行
う。
With the RF frequency as fRF, frequency conversion is performed using the following equation.

f IF+ f t= f RF     ・・・・・
・(1)このような構成において、キャリアホッピング
を行うため、即ちRF周波数fRFを変化させるために
は、IF周波数f xyが固定であるため、選択回路5
によって固定周波数発振回路1〜4の出力周波数f1〜
fnの信号を任意に選択切替して、周波数fiを変化さ
せている。
f IF+ f t= f RF...
(1) In such a configuration, in order to perform carrier hopping, that is, to change the RF frequency fRF, since the IF frequency fxy is fixed, the selection circuit 5
The output frequency f1 of fixed frequency oscillation circuits 1 to 4 is determined by
The frequency fi is changed by arbitrarily selecting and switching the fn signal.

「発明が解決しようとする課題」 このような従来の方法では、ホッピングするキャリア数
をMとすると、全てのキャリアにホッピングするために
は、固定周波数発振回路がM個必要となり、ハードウェ
ア量が増大するという欠点があった。
``Problem to be solved by the invention'' In such a conventional method, if the number of carriers to be hopped is M, in order to hop to all carriers, M fixed frequency oscillation circuits are required, which increases the amount of hardware. The disadvantage was that it increased.

本発明の目的は、周波数発振回路の個数をホッピングキ
ャリア数以下に削減したキャリアホッピング方式用の周
波数変換部を提供することにあり、従来技術の欠点であ
ったハードウェア量の増大を改善する。
An object of the present invention is to provide a frequency converter for a carrier hopping method in which the number of frequency oscillation circuits is reduced to less than the number of hopping carriers, thereby improving the increase in the amount of hardware, which is a drawback of the prior art.

「課題を解決するための手段」 本発明の周波数変換方式は、 1系統の送受信装置で、複数のタイムスロットに時分割
されたM波の周波数を用いて通信する方式において、任
意の周波数に設定可能であるN個(1<N<M)の可変
周波数発振回路と、該可変周波数発振回路の周波数を制
御する周波数制御回路と、前記N個の可変周波数発振回
路の出力信号のうちl出力信号を選択する選択回路と、
該選択回路の出力により周波数を変換する周波数変換回
路によって構成され、前記可変周波数発振回路の周波数
変更を、前記選択回路で選択されていない間に、必要に
応じてタイムスロット単位で行うことを特徴とする。
"Means for Solving the Problems" The frequency conversion method of the present invention is a method for communicating using M-wave frequencies that are time-divided into multiple time slots using one system of transmitting/receiving equipment, and can be set to any frequency. N possible variable frequency oscillation circuits (1<N<M), a frequency control circuit that controls the frequency of the variable frequency oscillation circuit, and l output signal among the output signals of the N variable frequency oscillation circuits. A selection circuit that selects
It is comprised of a frequency conversion circuit that converts the frequency based on the output of the selection circuit, and is characterized in that the frequency of the variable frequency oscillation circuit is changed in units of time slots as necessary while the variable frequency oscillation circuit is not selected by the selection circuit. shall be.

「作用」 本発明の周波数変換方式は、キャリアホッピング方式用
の周波数変換部の周波数発振器として、任意の周波数が
設定可能な複数の可変周波数発振器を用い、可変周波数
発振回路の周波数変更を、選択回路で選択されていない
間に、必要に応じてタイムスロット単位で行うことによ
り、従来の方式に比して周波数発振回路の個数を削減す
る。
"Operation" The frequency conversion method of the present invention uses a plurality of variable frequency oscillators that can set arbitrary frequencies as frequency oscillators of the frequency conversion section for the carrier hopping method, and changes the frequency of the variable frequency oscillation circuit by using a selection circuit. The number of frequency oscillation circuits can be reduced compared to the conventional system by performing this in units of time slots as necessary while the frequency oscillation circuit is not selected.

「実施例」 第1図゛は本発明の詳細な説明するための図であって、
図中11〜14はN個の可変周波数発振回路、15は選
択回路、16は周波数変換回路、I7は周波数設定回路
である。第2図は、選択されている可変周波数発振回路
と出力周波数の関係を説明するための図である。
"Example" FIG. 1 is a diagram for explaining the present invention in detail,
In the figure, 11 to 14 are N variable frequency oscillation circuits, 15 is a selection circuit, 16 is a frequency conversion circuit, and I7 is a frequency setting circuit. FIG. 2 is a diagram for explaining the relationship between the selected variable frequency oscillation circuit and the output frequency.

可変周波数発振回路11−14のそれぞれは、周波数設
定回路17の制御信号により出力周波数が任意に設定さ
れる発振回路である。N個の可変周波数発振回路11〜
14の出力周波数f、−fnの信号は選択回路15に入
力され、選択回路15によってn波の信号のうちl波f
iの信号が選択される。この選択された周波数fiの信
号は周波数変換回路16に入力され、重連した(1)式
によって周波数変換される。
Each of the variable frequency oscillation circuits 11 to 14 is an oscillation circuit whose output frequency is arbitrarily set by a control signal from the frequency setting circuit 17. N variable frequency oscillation circuits 11~
14 output frequencies f and -fn are input to the selection circuit 15, which selects the l-wave f out of the n-wave signals.
The i signal is selected. This signal of the selected frequency fi is input to the frequency conversion circuit 16 and frequency converted using the multiplexed equation (1).

このような構成において、可変周波数発振回路の周波数
を設定してから希望周波数が出力されるまでの周波数設
定時間をtとすると、可変周波数発振回路から周波数f
工を出力終了後、側周波数f、の設定を行うと、時間を
後に周波数f、が出力できることになる。そこで、可変
周波数発振回路の周波数変更を、その可変周波数発振回
路が選択回路15によって選択されていない間に行い、
そして周波数設定と選択回路5の選択切替をタイムスロ
ット単位で制御する。これにより、任意の周波数を出力
することが可能となる。また、任意の時間に任意の1キ
ヤリアにホッピングする場合に必要となる可変周波数発
振回路の最少個数は、タイムスロット長をτとすると、
〔(t/τ)十夏〕以上の最小の整数となる。
In such a configuration, if t is the frequency setting time from setting the frequency of the variable frequency oscillation circuit until the desired frequency is output, then the frequency f from the variable frequency oscillation circuit is
If the side frequency f is set after outputting the signal, the frequency f can be output after a certain period of time. Therefore, the frequency of the variable frequency oscillation circuit is changed while the variable frequency oscillation circuit is not selected by the selection circuit 15,
Then, frequency setting and selection switching of the selection circuit 5 are controlled in units of time slots. This makes it possible to output any frequency. In addition, the minimum number of variable frequency oscillator circuits required for hopping to any one carrier at any time is as follows, where τ is the time slot length.
It is the smallest integer greater than or equal to [(t/τ) ten summers].

ここで、1例として(((1/τ)+1〕以上の最小の
整数)=3の場合において選択されている可変周波数発
振回路と出力周波数の関係を第3図に示す。ただし、可
変周波数発振回路をA、B、Cとし、それぞれの設定周
波数をf1〜f8の8波とする。タイムスロット1で周
波数f1を設定した可変周波数発振回路Aを選択し、タ
イムスロット2で周波数f、を使用する場合は、可変周
波数発振回路Aとは別の周波数ftを設定した可変周波
数発振回路Bを選択する。このように連続したタイムス
ロットで異なる周波数を出力するには、可変周波数発振
回路A、B、Cの選択を替えなければならないが、タイ
ムスロット1で使用した可変周波数発振回路−Aは、時
間tの間隔をあけたタイムスロット4では別層波数f4
を設定した発振回路として使用することができる。した
がって、第2図に示したように3個の可変周波数発振回
路A、B、Cによってf 、 −f 、の8周波数の出
力が可能となる。
Here, as an example, the relationship between the selected variable frequency oscillation circuit and the output frequency in the case of ((minimum integer greater than or equal to (1/τ) + 1) = 3 is shown in Figure 3. However, the variable frequency The oscillation circuits are A, B, and C, and the set frequencies of each are 8 waves f1 to f8.In time slot 1, variable frequency oscillator circuit A with frequency f1 is selected, and in time slot 2, frequency f is selected. When using variable frequency oscillation circuit A, select variable frequency oscillation circuit B which has a different frequency ft than variable frequency oscillation circuit A. In order to output different frequencies in consecutive time slots in this way, variable frequency oscillation circuit A, Although the selection of B and C must be changed, the variable frequency oscillator circuit A used in time slot 1 has a different layer wave number f4 in time slot 4 with an interval of time t.
It can be used as an oscillation circuit with Therefore, as shown in FIG. 2, the three variable frequency oscillation circuits A, B, and C can output eight frequencies of f, -f.

なお、ここでは8周波数の場合を例に挙げたが、可変周
波数発振回路の可変周波数範囲内であれば、同波でも設
定が可能である。
Although the case of 8 frequencies is taken as an example here, the same wave can be set as long as it is within the variable frequency range of the variable frequency oscillation circuit.

「発明の効果」 以上説明したように、本発明の周波数変換方式は、キャ
リアホッピング方式用の周波数変換部の周波数発振器と
して、任意の周波数が設定可能な複数の可変周波数発振
器を用い、可変周波数発振回路の周波数変更を、選択回
路で選択されていない間に、必要に応じてタイムスロッ
ト単位で行うことにより、周波数発振回路の個数をホッ
ピングキャリア数以下に削減でき、ハードウェア量の軽
減を図ることができる。
"Effects of the Invention" As explained above, the frequency conversion method of the present invention uses a plurality of variable frequency oscillators that can set any frequency as the frequency oscillator of the frequency conversion section for the carrier hopping method, and performs variable frequency oscillator. To reduce the number of frequency oscillation circuits to less than the number of hopping carriers and reduce the amount of hardware by changing the frequency of the circuit in time slot units as necessary while the circuit is not selected by the selection circuit. Can be done.

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

第1図および第2図は本発明の詳細な説明するための図
であって、第1図はブロック構成図、第2図は選択され
た可変周波数発振回路と出力周波数との関係の説明図で
ある。 第3図は従来のキャリアホッピング方式に用いられてい
た周波数変換部の構成例の説明図である。 11−14・・・・・・可変周波数発振回路、15・・
・・・・選択回路、  I6・・・・・・周波数変換回
路、17・・・・・・周波数設定回路。 \峻。 第1図 第2図 一τ−−− 1 −
1 and 2 are diagrams for explaining the present invention in detail, in which FIG. 1 is a block diagram, and FIG. 2 is an explanatory diagram of the relationship between a selected variable frequency oscillation circuit and an output frequency. It is. FIG. 3 is an explanatory diagram of a configuration example of a frequency converter used in the conventional carrier hopping method. 11-14...Variable frequency oscillation circuit, 15...
... Selection circuit, I6 ... Frequency conversion circuit, 17 ... Frequency setting circuit. \Shun. Fig. 1 Fig. 2 1 τ--- 1 -

Claims (1)

【特許請求の範囲】[Claims] 1系統の送受信装置で、複数のタイムスロットに時分割
されたM波の周波数を用いて通信する方式において、任
意の周波数に設定可能であるN個(1<N<M)の可変
周波数発振回路と、該可変周波数発振回路の周波数を制
御する周波数制御回路と、前記N個の可変周波数発振回
路の出力信号のうち1出力信号を選択する選択回路と、
該選択回路の出力により周波数を変換する周波数変換回
路によって構成され、前記可変周波数発振回路の周波数
変更を、前記選択回路で選択されていない間に、必要に
応じてタイムスロット単位で行うことを特徴とする周波
数変換方式。
N variable frequency oscillator circuits (1<N<M) that can be set to any frequency in a method of communicating using M-wave frequencies time-divided into multiple time slots using a single transmitting/receiving device. a frequency control circuit that controls the frequency of the variable frequency oscillation circuit; and a selection circuit that selects one output signal from among the output signals of the N variable frequency oscillation circuits;
It is comprised of a frequency conversion circuit that converts the frequency based on the output of the selection circuit, and is characterized in that the frequency of the variable frequency oscillation circuit is changed in units of time slots as necessary while the variable frequency oscillation circuit is not selected by the selection circuit. Frequency conversion method.
JP8825188A 1988-02-05 1988-02-05 System for converting frequency Pending JPH01200844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8825188A JPH01200844A (en) 1988-02-05 1988-02-05 System for converting frequency

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8825188A JPH01200844A (en) 1988-02-05 1988-02-05 System for converting frequency

Publications (1)

Publication Number Publication Date
JPH01200844A true JPH01200844A (en) 1989-08-14

Family

ID=12158998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8825188A Pending JPH01200844A (en) 1988-02-05 1988-02-05 System for converting frequency

Country Status (1)

Country Link
JP (1) JPH01200844A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02214236A (en) * 1989-02-14 1990-08-27 Toyo Commun Equip Co Ltd Frequency hopping device
JPH05504248A (en) * 1990-02-06 1993-07-01 モトローラ・インコーポレーテッド Interconnection and processing systems to enable frequency hopping

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62261239A (en) * 1986-05-07 1987-11-13 Fujitsu Ltd High speed hopping system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62261239A (en) * 1986-05-07 1987-11-13 Fujitsu Ltd High speed hopping system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02214236A (en) * 1989-02-14 1990-08-27 Toyo Commun Equip Co Ltd Frequency hopping device
JPH05504248A (en) * 1990-02-06 1993-07-01 モトローラ・インコーポレーテッド Interconnection and processing systems to enable frequency hopping

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