JP2517963B2 - Mobile radio with frequency stabilization function - Google Patents
Mobile radio with frequency stabilization functionInfo
- Publication number
- JP2517963B2 JP2517963B2 JP62114534A JP11453487A JP2517963B2 JP 2517963 B2 JP2517963 B2 JP 2517963B2 JP 62114534 A JP62114534 A JP 62114534A JP 11453487 A JP11453487 A JP 11453487A JP 2517963 B2 JP2517963 B2 JP 2517963B2
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- transmission
- reception
- reference oscillator
- mobile radio
- 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 - Fee Related
Links
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Transceivers (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、例えば、UHF帯の狭帯域移動通信のよう
に、角度変調を用い、かつ、搬送波ドリフトを極めて微
小に抑える必要のある通信方式において、自動的に搬送
波周波数を所定の値に制御する機能を有する移動無線機
に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a communication method that uses angle modulation and that requires extremely small carrier drift, such as UHF band narrow band mobile communication. In the above, the present invention relates to a mobile wireless device having a function of automatically controlling a carrier frequency to a predetermined value.
（従来の技術） 通信方式における搬送波ドリフトは伝送品質を著しく
劣化させる。多チャネル切り換え機能を有する移動無線
機において搬送波周波数を安定化する従来技術として
は、〔１〕周波数弁別器のDC成分を周波数制御情報とす
るAFC、〔２〕安定な基地局送信波を受信して、この信
号をもとに、局部発振器にPLLをかける等の技術があ
る。しかしながら、これらの技術を、フェージングを伴
った移動通信特有の移動無線伝播路において、極めて高
い搬送波周波数安定度を要求される通信方式に適用しよ
うとすることは特願昭61−168004で述べたように非常な
困難を伴う。(Prior Art) Carrier wave drift in a communication system significantly deteriorates transmission quality. As a conventional technique for stabilizing a carrier frequency in a mobile radio having a multi-channel switching function, [1] AFC using the DC component of a frequency discriminator as frequency control information, [2] receiving a stable base station transmission wave Then, there is a technique such as applying a PLL to a local oscillator based on this signal. However, as described in Japanese Patent Application No. 61-168004, it is attempted to apply these techniques to a communication system that requires extremely high carrier frequency stability in a mobile radio propagation path peculiar to mobile communication with fading. With great difficulty.
そこで特願昭61−168004では、これを解決するための
手段として、高安定な基地局送信波を受信し、その周波
数を正確に測定する方法を示し、特願昭61−168005にお
いて、移動無線機の周波数安定度を飛躍的に向上させる
手段を提案した。第１図にその基本構成を示す。この構
成においては、アンテナ1.1より受信される安定な基地
局送信波を受信部1.2で周波数変換し、そのIF出力を雑
音除去手段1.3を通過させ、周波数カウンタ1.4で測定
し、その結果が所定の値となるように基準発振器1.6を
基準発振器制御部1.5を用いて制御し、周波数シンセサ
イザ1.7を基地局と同等の周波数安定度に実現するもの
である。また、1.7を、変調器1.8、ミクサ1.9、電力増
幅器1.10からなる送信部で共用する移動無線機において
は、移動無線機の送信周波数安定度も安定な基地局送信
周波数安定度と同等とすることができる。Therefore, in Japanese Patent Application No. 61-168004, as a means for solving this, a method of receiving a highly stable base station transmission wave and measuring its frequency accurately is shown. We proposed a means to dramatically improve the frequency stability of the machine. FIG. 1 shows the basic configuration. In this configuration, the stable base station transmission wave received by the antenna 1.1 is frequency-converted by the reception section 1.2, the IF output thereof is passed through the noise removing means 1.3, and the frequency counter 1.4 measures the result. The reference oscillator 1.6 is controlled by the reference oscillator control unit 1.5 so that the value becomes a value, and the frequency synthesizer 1.7 is realized with the frequency stability equivalent to that of the base station. In addition, in the case of a mobile radio that shares 1.7 with a modulator 1.8, a mixer 1.9, and a power amplifier 1.10, the transmission frequency stability of the mobile radio shall be the same as the stable base station transmission frequency stability. You can
（発明が解決しようとする問題点） ところで、送信スプリアスの減少、送受信周波数の設
定の自由度の大きさを考慮して、第２図に示すような、
受信部用シンセサイザ2.1、受信部用基準発振器2.2、変
調器を兼ねた送信部用シンセサイザ2.3、送信部用基準
発振器2.4を有する移動無線機が開発されている。この
ような移動無線機には、特願昭61−168005に示した周波
数安定化回路を適用しても、受信用基準発振器のみしか
制御できないために第２図のように周波数シンセサイザ
を２系列独立に有する移動無線機の送信周波数を安定化
することはできない。(Problems to be Solved by the Invention) By the way, considering the reduction of transmission spurious and the degree of freedom of setting transmission / reception frequency, as shown in FIG.
A mobile radio having a synthesizer 2.1 for receiver, a reference oscillator 2.2 for receiver, a synthesizer 2.3 for transmitter also serving as a modulator, and a reference oscillator 2.4 for transmitter has been developed. Even if the frequency stabilizing circuit shown in Japanese Patent Application No. 61-168005 is applied to such a mobile radio device, only two reference oscillators for reception can be controlled. It is not possible to stabilize the transmission frequency of the mobile wireless device in the above.
（発明の目的） 本発明の目的は、搬送波ドリフトを極めて微小に抑え
る必要のある、角度変調を用いた通信方式に供する移動
無線機において、送信系と受信系の２つの基準発振器の
何れも基地局の送信波と同等の安定度まで向上させる手
段を提供することにある。(Object of the Invention) An object of the present invention is to provide a mobile radio device for a communication system using angle modulation, in which it is necessary to suppress carrier drift to an extremely small level, and both of two reference oscillators, a transmission system and a reception system, are base stations. It is to provide a means for improving the stability to the same level as the transmitted wave of the station.
（問題点を解決するための手段） 本発明は、送受信部で個別の基準発振器を用いる移動
無線機において、周波数安定化回路に、受信用シンセサ
イザの基準発振器入力に切り換えスイッチを設け、送信
用基準発振器あるいは受信用基準発振器のいずれか一方
を受信用シンセサイザに接続し、選択された基準発振器
の周波数安定化動作を行い、その後に先に選択されなか
った基準発振器を受信用シンセサイザに接続し、周波数
安定化動作を行うことを特徴とする。(Means for Solving the Problems) The present invention relates to a mobile radio device that uses individual reference oscillators in a transmission / reception section, and a frequency stabilization circuit is provided with a changeover switch at a reference oscillator input of a reception synthesizer to provide a transmission reference signal. Either the oscillator or the reference oscillator for reception is connected to the synthesizer for reception, the frequency stabilization operation of the selected reference oscillator is performed, and then the previously selected reference oscillator is connected to the synthesizer for reception, and the frequency It is characterized by performing a stabilizing operation.
この発明を適用することにより、送信部及び受信部で
個別の基準発振器を持つ移動無線機においても、送信周
波数及び受信周波数のいずれも高安定な基地局送信波の
周波数安定度と同等に安定化できることが従来技術と異
なる。By applying the present invention, even in a mobile wireless device having separate reference oscillators in the transmission unit and the reception unit, both the transmission frequency and the reception frequency are stabilized at the same level as the frequency stability of the base station transmission wave. What can be done is different from the prior art.
（実施例−１） 第３図に実施例−１の構成を示す。3.1は受信用周波
数シンセサイザの制御入力を切り換えるスイッチ（SW−
Ａ）、3.2は送信／受信基準発振器制御部、3.3は基準発
振器制御信号を切り換えるスイッチ（SW−Ｂ）で3.2に
より制御される。3.4は送信用基準発振器制御信号をサ
ンプル及びホールドするサンプル／ホールド回路で3.2
により制御される。3.5は受信用基準発振器制御信号を
サンプル及びホールドするサンプル／ホールド回路で3.
2により制御される。これらが、第１図及び第２図に追
加され、第３図を構成している。Example-1 FIG. 3 shows the configuration of Example-1. 3.1 is a switch (SW−) that switches the control input of the receiving frequency synthesizer.
A) and 3.2 are transmission / reception reference oscillator control units, and 3.3 is a switch (SW-B) for switching the reference oscillator control signal, which is controlled by 3.2. 3.4 is a sample / hold circuit that samples and holds the reference oscillator control signal for transmission.
Controlled by. 3.5 is a sample / hold circuit that samples and holds the reference oscillator control signal for reception.
Controlled by 2. These are added to FIGS. 1 and 2 to form FIG.
以下、この構成を持つ移動無線機の周波数安定化動作
について説明する。基準発振器を送受信で個別に有する
場合においても、通常は2.2と2.4は同一の発信周波数を
有する基準発振器が用いられる。基準発振器の出力を分
周して、それを基準信号周波数として利用する方法で
は、見掛け上、基準発振器の周波数を送信と受信で異な
らせることが出来るが、本質的には第１図、第２図、第
３図と同じと考えられる。The frequency stabilizing operation of the mobile wireless device having this configuration will be described below. Even when the reference oscillators are individually provided for transmission and reception, the reference oscillators having the same oscillation frequency are normally used for 2.2 and 2.4. In the method of dividing the output of the reference oscillator and using it as the reference signal frequency, the frequency of the reference oscillator can be apparently made different between transmission and reception, but it is essentially shown in FIG. It is considered to be the same as FIG. 3 and FIG.
まず、3.2は3.1及び3.3をａ側に切り換え、受信用基
準発振器を特願昭61−168005に示した方法で基地局送信
波を受信しながら、受信用基準発振器の発信周波数を基
地局送信波と同等な程度まで安定化する。この過程にお
いては、3.5は基準発振器制御信号をサンプルし、その
まま、2.2に受けわたす。受信用基準発振器の安定化が
終了すると、3.2は3.5を制御し、基準発振器制御信号情
報をホールドする。次に、3.2は3.1及び3.3をｂ側に切
り換え、送信用基準発振器2.4の出力を用いて、基地局
送信波を受信しながら、前述と同様な動作により、送信
用サンプルホールド回路3.4を制御し、送信用基準発振
器の周波数安定度を基地局送信波と同等な程度に安定化
する。送信用基準発振器の3.4の安定化が終了すると、
3.2は3.4を制御して送信用基準発振器の周波数制御情報
をホールドする。First, in 3.2, 3.1 and 3.3 are switched to the side a, and while the reference oscillator for reception is receiving the transmission wave of the base station by the method shown in Japanese Patent Application No. 61-168005, the oscillation frequency of the reference oscillator for reception is set to Stabilize to the same extent as. In this process, 3.5 samples the reference oscillator control signal and passes it as is to 2.2. After stabilization of the reference oscillator for reception, 3.2 controls 3.5 to hold the reference oscillator control signal information. Next, in 3.2, 3.1 and 3.3 are switched to the b side, and the output of the transmission reference oscillator 2.4 is used to control the transmission sample-hold circuit 3.4 by the same operation as described above while receiving the base station transmission wave. , The frequency stability of the reference oscillator for transmission is stabilized to the same level as the transmission wave of the base station. After the stabilization of 3.4 of the transmission reference oscillator,
3.2 controls 3.4 to hold the frequency control information of the reference oscillator for transmission.
以上の送信側と受信側基準発振器の安定化動作の順序
は逆でも良いし、3.2が3.4と3.5に対する制御端子を有
し、3.3のSW−Ｂが省略されていても良いことは明らか
である。また特願昭61−168004で示したように、周波数
カウンタのタイムベースは送受何れの基準発振器を基準
としても同様な効果が得られる。以上の構成は特願昭61
−168004に示したように、低消費電力のCMOSディジタル
IC化が容易に達成でき、本発明の無線機自体は通常の周
波数安定機能を有さない無線機に比べて特に大型化する
わけでない。It is clear that the order of stabilizing operations of the reference oscillators on the transmitting side and the receiving side may be reversed, or 3.2 may have control terminals for 3.4 and 3.5 and SW-B of 3.3 may be omitted. . Further, as shown in Japanese Patent Application No. 61-168004, the same effect can be obtained even if the reference time oscillator of the frequency counter is used as a reference. The above configuration is Japanese Patent Application Sho 61
As shown in −168004, low power CMOS digital
An IC can be easily achieved, and the radio device of the present invention itself is not particularly large in size as compared with a radio device having no ordinary frequency stabilizing function.
このように、本実施例の効果として、従来は不可能で
あった、送信及び受信周波数の安定化を実現できる。As described above, as an effect of this embodiment, it is possible to realize stabilization of the transmission and reception frequencies, which has been impossible in the past.
また、特願昭61−168004で述べた、周波数測定精度を
さらに高める方式を本発明に適用出来ることは言うまで
もない。Further, it goes without saying that the method described in Japanese Patent Application No. 61-168004, which further improves the frequency measurement accuracy, can be applied to the present invention.
（実施例−２） 送受個別に基準発振器を有する利点の一つとして、変
調周波数特性の改善のために、送信用基準発振器にも変
調をかけることができる。即ち、第４図において変調信
号処理回路4.1は変調信号をｃとｄに分け、ｄは送信用
周波数シンセサイザに入力され、ｃは点線の部分を通ら
ずに2.3に入力される。この構成の移動無線機に実施例
−１を適用するためには、点線内に加算器4.2を加え、
4.1からの変調信号と3.4からの送信用基準発振器制御信
号を加算し、2.3の制御信号入力ｅに入力する。その他
の構成は第３図と同等となる。(Example 2) One of the advantages of having a reference oscillator for each of transmission and reception is that the transmission reference oscillator can also be modulated in order to improve the modulation frequency characteristic. That is, in FIG. 4, the modulation signal processing circuit 4.1 divides the modulation signal into c and d, d is input to the transmission frequency synthesizer, and c is input to 2.3 without passing through the dotted line portion. In order to apply Example-1 to the mobile wireless device of this configuration, adder 4.2 is added within the dotted line,
The modulated signal from 4.1 and the reference oscillator control signal for transmission from 3.4 are added and input to the control signal input e of 2.3. Other configurations are the same as those in FIG.
ここで、送信用基準発振器の出力信号ｆは角度変調さ
れていることになるが、受信用シンセサイザの基準発振
器として使用する場合は変調信号を入力しないので、特
に問題は生じない。この時、電力増幅器の電源をoffに
すること等により不要の送信を行っていないことは言う
までもない。Here, the output signal f of the reference oscillator for transmission is angle-modulated, but when used as the reference oscillator of the synthesizer for reception, since no modulation signal is input, no particular problem occurs. At this time, needless to say, unnecessary transmission is not performed by turning off the power of the power amplifier.
（発明の効果） 送信と受信で個別の基準発振器を有する移動無線機
は、送信スプリアス特性、送信周波数特性等の諸伝送特
性を高度に保ちつつ、送受信周波数間隔が異なる方式に
適用することが可能である。以上説明したように、本発
明は送信と受信で個別の基準発振器を有する移動無線機
の送受信周波数を安定化することができるので、種々の
送受信周波数構成に容易に適用可能で、極めて高い搬送
波周波数の安定度を有する移動無線機を小型、安価に提
供するうえで、極めて有効である。(Effects of the Invention) A mobile radio device having separate reference oscillators for transmission and reception can be applied to a system with different transmission / reception frequency intervals while maintaining various transmission characteristics such as transmission spurious characteristics and transmission frequency characteristics. Is. As described above, since the present invention can stabilize the transmission / reception frequency of a mobile radio device having separate reference oscillators for transmission and reception, it can be easily applied to various transmission / reception frequency configurations and has an extremely high carrier frequency. It is extremely effective in providing a small size and low cost mobile radio device having stability.
第１図は周波数安定化機能を有する従来の移動無線機で
ある。 第２図は送信及び受信で個別の基準発振器を有する従来
の移動無線機である。 第３図（Ａ）は本発明の実施例であって、送信及び受信
で個別の基準発振器を有し、送信及び受信のいずれも基
地局送信周波数の安定度と同等に安定化できる移動無線
機である。 第３図（Ｂ）は周波数シンセサイザのブロック図であ
る。 第４図は本発明の実施例であっで、送信及び受信で個別
の基準発振器を有し、送信用基準発振器に変調をかける
構成の移動無線機である。 1.1……アンテナ、1.2……受信部、 1.3……雑音除去手段、1.4……周波数カウンタ、 1.5……基準発振器、1.6……基準発振器制御部、 1.7……周波数シンセサイザ、1.8……変調器、 1.9……ミクサ、1.10……電力増幅器、 2.1……受信用周波数シンセサイザ、 2.2……受信用基準発振器、 2.3……送信用周波数シンセサイザ、 2.4……送信用基準発振器、 3.1……スイッチ（SW−Ａ） 3.2……送信／受信基準発振器制御部、 3.3……スイッチ（SW−Ｂ） 3.4……送信用サンプルホールド回路、 3.5……受信用サンプルホールド回路、 4.1……変調信号処理回路、4.2……加算器。FIG. 1 shows a conventional mobile wireless device having a frequency stabilizing function. FIG. 2 is a conventional mobile radio device having separate reference oscillators for transmission and reception. FIG. 3 (A) shows an embodiment of the present invention, in which a mobile radio device having separate reference oscillators for transmission and reception and capable of stabilizing both transmission and reception at the same level as the stability of the base station transmission frequency. Is. FIG. 3B is a block diagram of the frequency synthesizer. FIG. 4 shows an embodiment of the present invention, which is a mobile radio device having separate reference oscillators for transmission and reception, and modulating the transmission reference oscillator. 1.1 …… antenna, 1.2 …… reception section, 1.3 …… noise removal means, 1.4 …… frequency counter, 1.5 …… reference oscillator, 1.6 …… reference oscillator control section, 1.7 …… frequency synthesizer, 1.8 …… modulator, 1.9 …… Mixer, 1.10 …… Power amplifier, 2.1 …… Receive frequency synthesizer, 2.2 …… Receive reference oscillator, 2.3 …… Transmit frequency synthesizer, 2.4 …… Transmit reference oscillator, 3.1 …… Switch (SW− A) 3.2 …… Transmission / reception reference oscillator controller, 3.3 …… Switch (SW-B) 3.4 …… Transmission sample hold circuit, 3.5 …… Reception sample hold circuit, 4.1 …… Modulation signal processing circuit, 4.2… … Adder.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭63−26020（ＪＰ，Ａ) 特開 昭63−26037（ＪＰ，Ａ) 特開 昭63−256010（ＪＰ，Ａ) 昭和62年電子情報通信学会創立70周年 記念総合全国大会講演論文集 分冊10 （昭和62−３−15） Ｐ．10−75 ─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-63-26020 (JP, A) JP-A-63-26037 (JP, A) JP-A-63-256010 (JP, A) Electronic information in 1987 Proceedings of the 70th anniversary of the establishment of the Institute of Communications, Japan 10-75
Claims (1)
チャネル無線機が、送信周波数を定める送信部発振器と
して１つの周波数シンセサイザを有し、受信周波数を定
める受信部局部発振器として１つの周波数シンセサイザ
を有し、前記２つのシンセサイザの基準発振器を独立に
２ケ有し、受信周波数の測定する周波数測定回路と、そ
の出力に接続される基準発振器制御回路と、該制御部の
出力を選択的にサンプルホールドして前記２つの基準発
振器を各々制御する受信用サンプルホールド回路及び送
信用サンプルホールド回路と、受信部の周波数シンセサ
イザの制御入力として２つの基準発振器の出力の一方を
選択するスイッチとを有することを特徴とする、周波数
安定機能を有する移動無線機。1. A multi-channel radio device in a mobile communication system using angle modulation has one frequency synthesizer as a transmitter oscillator that determines a transmission frequency, and one frequency synthesizer as a receiver local oscillator that determines a reception frequency. And two independent reference oscillators of the two synthesizers, a frequency measuring circuit for measuring a reception frequency, a reference oscillator control circuit connected to the output thereof, and selectively sampling the output of the control unit. A reception sample-hold circuit and a transmission sample-hold circuit for holding and controlling each of the two reference oscillators; and a switch for selecting one of the outputs of the two reference oscillators as a control input of the frequency synthesizer of the reception unit. A mobile wireless device having a frequency stabilizing function, characterized by:
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62114534A JP2517963B2 (en) | 1987-05-13 | 1987-05-13 | Mobile radio with frequency stabilization function |
| US07/072,819 US4817197A (en) | 1986-07-18 | 1987-07-13 | Mobile communication apparatus |
| DE3750757T DE3750757T2 (en) | 1986-07-18 | 1987-07-17 | Receiver arrangement for angle-modulated signals. |
| EP87306371A EP0253680B1 (en) | 1986-07-18 | 1987-07-17 | Angle modulated signal receiving apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62114534A JP2517963B2 (en) | 1987-05-13 | 1987-05-13 | Mobile radio with frequency stabilization function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63280520A JPS63280520A (en) | 1988-11-17 |
| JP2517963B2 true JP2517963B2 (en) | 1996-07-24 |
Family
ID=14640162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62114534A Expired - Fee Related JP2517963B2 (en) | 1986-07-18 | 1987-05-13 | Mobile radio with frequency stabilization function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2517963B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996001545A1 (en) * | 1994-07-06 | 1996-01-18 | Ntt Mobile Communications Network Inc. | Mobile communication system using base station frequency correcting method |
-
1987
- 1987-05-13 JP JP62114534A patent/JP2517963B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 昭和６２年電子情報通信学会創立７０周年記念総合全国大会講演論文集分冊１０（昭和６２−３−１５）Ｐ．１０−７５ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63280520A (en) | 1988-11-17 |
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