JPH0334729A - Radio transmitter-receiver - Google Patents
Radio transmitter-receiverInfo
- Publication number
- JPH0334729A JPH0334729A JP1170087A JP17008789A JPH0334729A JP H0334729 A JPH0334729 A JP H0334729A JP 1170087 A JP1170087 A JP 1170087A JP 17008789 A JP17008789 A JP 17008789A JP H0334729 A JPH0334729 A JP H0334729A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- circuit
- switching
- synthesizer
- 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.)
- Pending
Links
- 230000010355 oscillation Effects 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Transceivers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高速の周波数チャンネル切替えを行なう通信に
使用する無線送受信装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wireless transmitting/receiving device used for communication that performs high-speed frequency channel switching.
従来、高周波数安定度かつ多チャンネルの周波数切替え
を必要とする、自動車電話あるいはＴＤＭＡ（時分割多
元接続〉方式用等の無線送受信装置においては、局部発
振周波数信号の発生のためには、ただ−台のＰＬＬ （
位相同期ループ）方式の周波数シンセサイザが用いられ
ていた。Conventionally, in wireless transmitting/receiving equipment for car telephones or TDMA (time division multiple access) systems, which require high frequency stability and frequency switching of multiple channels, in order to generate a local oscillation frequency signal, only - PLL (
A phase-locked loop) frequency synthesizer was used.
第４図は従来実施されている無線送受信装置の一例を示
すブロック図である。１は送信回路であり、図には示さ
れない変調された中間周波数信号（周波数ｆ ＩＦ）入
力を局部発振周波数信号（周波数 ｆＬ〉と混合し送信
信号（周波数ｆＴ）に変換する。２は受信回路であり、
受信信号人力く周波数ｆｈ）を局部発振周波数信号（周
波数ｆｔ、）と混合し中間周波数信号く周波数ｆ ＋ｐ
）に変換し復調を施す回路である。３はＰＩＮダイオー
ドスイッチ等に代表されるＲＦ（高周波）スイッチであ
り、送信時には送信回路１からの送信出力を、空中線４
へ切替え、受信回路２へは阻止し、受１工時には空中線
４からの受信信号を受信回路２へ切替え、送信回路へは
阻止する。ＲＦスイッチ３の代りにデユープレクサが用
いられることもある。FIG. 4 is a block diagram showing an example of a conventional wireless transmitting/receiving device. 1 is a transmitter circuit, which mixes a modulated intermediate frequency signal (frequency f IF) input, which is not shown in the figure, with a local oscillation frequency signal (frequency fL) and converts it into a transmit signal (frequency fT). 2 is a receiver circuit and
The received signal (frequency fh) is mixed with the local oscillation frequency signal (frequency ft, ) to generate an intermediate frequency signal (frequency f + p).
) and demodulates it. 3 is an RF (high frequency) switch typified by a PIN diode switch, etc. When transmitting, the transmitting output from the transmitting circuit 1 is connected to the antenna 4.
At the time of reception, the received signal from the antenna 4 is switched to the receiving circuit 2, and is blocked from being sent to the transmitting circuit. A duplexer may be used instead of the RF switch 3.
５はＰＬＬ方式の周波数シンセサイザであり、周波数制
御回路６からの通信チャンネルデータに従った周波数制
御信号によって所望の周波数の出力を送出し、その出力
を局部発振周波数信号として送信回路１と受信回路２と
に供給している。Reference numeral 5 denotes a PLL type frequency synthesizer, which sends out an output at a desired frequency using a frequency control signal according to the communication channel data from the frequency control circuit 6, and uses the output as a local oscillation frequency signal to be used in the transmitting circuit 1 and the receiving circuit 2. and supplies it to.
以上説明した従来の無線送受信装置においては、ただ−
台のＰＬＬ方式の周波数シンセイザで、所要の局部発振
周波数帯域内のすべての周波数信号を発生させるため、
発生する周波数の変化幅が広くなる場合があるや周波数
シンセサイザの発生周波数の切替えにおいて周波数切替
時間は主としてＰＬＬの応答時間によって制約を受ける
が、この応答時間は発生周波数の変化幅が広くなるほど
長くなる傾向がある。従って周波数シンセサイザをただ
一台しか持たない無線送受信装置は所要の局部発振周波
数帯域が広く、かつ高速の周波数切替えの必要なＴＤＭ
Ａ通信等には使用できないという欠点があった。In the conventional wireless transmitting/receiving device described above, only -
In order to generate all frequency signals within the required local oscillation frequency band with a PLL frequency synthesizer,
In some cases, the range of change in the generated frequency becomes wider, and when switching the frequency generated by a frequency synthesizer, the frequency switching time is mainly constrained by the response time of the PLL, but this response time becomes longer as the range of change in the generated frequency becomes wider. Tend. Therefore, a wireless transmitter/receiver that has only one frequency synthesizer requires a wide local oscillation frequency band and a TDM that requires high-speed frequency switching.
It had the disadvantage that it could not be used for A communications, etc.
本発明の無線送受信装置は送信回路および受信回路と前
記送信回路および受信回路に局部発振周波数信号を供給
するＰＬＬ方式の周波数シンセサイザと前記周波数シン
セサイザの出力周波数を通信チャンネルに応じて設定す
るための周波数制御回路で構成され、一定の周波数帯域
内に多数の通信チャンネルをもつ無線送受信装置におい
て、局部発振周波数帯域を複数に分割し、各分割周波数
帯域毎に設けたＰＬＬ方式の周波数シンセサイザと、前
記周波数シンセサイザの出力を選択する出力切替回路と
、入力された切替信号に従って前記出力切替回路に切替
制御信号を送出する切替制御回路を有している。The wireless transmitting/receiving device of the present invention includes a transmitting circuit, a receiving circuit, a PLL frequency synthesizer for supplying a local oscillation frequency signal to the transmitting circuit and the receiving circuit, and a frequency synthesizer for setting the output frequency of the frequency synthesizer according to a communication channel. In a wireless transmitting/receiving device that is composed of a control circuit and has a large number of communication channels within a certain frequency band, a local oscillation frequency band is divided into a plurality of parts, and a PLL type frequency synthesizer provided for each divided frequency band, and It has an output switching circuit that selects the output of the synthesizer, and a switching control circuit that sends a switching control signal to the output switching circuit in accordance with an input switching signal.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例のブロック図である。１〜４
は第５図の従来の実施例にて説明したと同じ意味を表わ
す。１０は本発明におけるＰＬＬ方式の周波数シンセサ
イザ群をあられす。FIG. 1 is a block diagram of one embodiment of the present invention. 1-4
represents the same meaning as explained in the conventional embodiment of FIG. 10 indicates a PLL type frequency synthesizer group according to the present invention.
１０１ａ、１０１ｂ、１０１ｃ、−、および１０１ｎは
第１から第ＮｔでのＮ台のＰ Ｌ Ｉ一方式の周波数シ
ンセサイザをあられす。但しＮは２以上の整数である。101a, 101b, 101c, -, and 101n represent N PLI-type frequency synthesizers from first to Nt. However, N is an integer of 2 or more.
１０２は局部発振周波数信号の出力切替回路であり、周
波数シンセサイザ１０１ａ〜１０１ｎのうちどれかの周
波数シンセサイザを選択して送信回路１および受信回路
２に接続する回路であり、高速スイッチのためＰＩＮス
イッチ等が使用される。７は周波数制御回路であり、通
信チャンネルデータに従った局部発振周波数を設定する
ために、この実施例においては周波数シンセサイザ１０
１ａ〜１ｏｉｎの発生周波数を制御するための周波数設
定信号および出力切替回路１０２の接続路を設定するた
めの切替えを制御する切替制御回路１工への切替信号の
、２種類を送出する。102 is a local oscillation frequency signal output switching circuit, which selects one of the frequency synthesizers 101a to 101n and connects it to the transmitting circuit 1 and the receiving circuit 2, and for high-speed switching, a PIN switch or the like is used. is used. 7 is a frequency control circuit, and in this embodiment, a frequency synthesizer 10 is used to set a local oscillation frequency according to communication channel data.
Two types of signals are sent: a frequency setting signal for controlling the generation frequency of 1a to 1oin, and a switching signal to the switching control circuit 1 for controlling switching for setting the connection path of the output switching circuit 102.
第２図および第３図は第一の実施例か高速の周波数切替
を可能とする事を説明する図である。FIGS. 2 and 3 are diagrams explaining that the first embodiment enables high-speed frequency switching.
第２図は送信周波数ｆＴ、受信周波数ｆＲ１局部発振周
波数ｆＬの周波数配置を示す。この周波数配置は共通局
部発振器方式のごく一般的な配置例であり、送信信号は
下側波帯を用い、受信周波数変換は下側局部発振周波数
を用い、中間周波数ｆｌＦは送・受信とも同一周波数と
する例である。FIG. 2 shows the frequency arrangement of the transmission frequency fT, the reception frequency fR1, and the local oscillation frequency fL. This frequency arrangement is a very common arrangement example of the common local oscillator system, in which the lower sideband is used for the transmission signal, the lower local oscillation frequency is used for reception frequency conversion, and the intermediate frequency flF is the same frequency for both transmission and reception. This is an example.
ここで通信帯域がＦ必要であり、通信チャンネル数がＮ
ＸＭ （但しＭは正の整数）必要であるとすれば局部発
振周波数の発生周波数は−ｆＬの付近でＦの帯域につい
て、ＮＸＭのチャンネル数だけ必要である。Here, the communication band is F and the number of communication channels is N.
If XM (where M is a positive integer) is required, the frequency at which the local oscillation frequency is generated is around -fL, and for the band F, the number of channels is NXM.
第３図は第一の実施例における局部発振周波数配置の詳
細を示したものである９周波数シンセサイザ群１０は周
波数シンセサイザ１０１ ａ 。FIG. 3 shows details of the local oscillation frequency arrangement in the first embodiment.The nine-frequency synthesizer group 10 includes a frequency synthesizer 101a.
１０１ｂ、１０１ｃ、＝・、１０１ｎとＮ台用い周波数
帯域ＦをＮで等分割ずれは、例えば１台の周波数シンセ
サイザ１０１はで分担すべき周波数帯域ＦａはＦ／Ｎと
なる。以下、周波数シンセサイザ１０１ｂ、１０１ｃ、
−＝、１０１ ｎについても同様である。そして各周波
数シンセイザにＭチャンネルの周波数を分担させる。101b, 101c, =., 101n, and the frequency band F used by N units is equally divided by N. For example, the frequency band Fa to be shared by one frequency synthesizer 101 becomes F/N. Below, frequency synthesizers 101b, 101c,
The same applies to −=, 101 n. Then, each frequency synthesizer is made to share the frequency of the M channel.
従来の実施例においてただ１台の周波数シンセサイザを
用いた場合には通信チャンネルの切替時の局部発振周波
数の周波数変化幅はｆ□よりｆ ｎｍまでＦの全周波数
変化幅が取りうる。しかし本発明の第一の実施例におけ
る局部発振周波数の周波数変化幅は例えばｆ、よりｆ
ａｍまで、すなわちＦａとなり、Ｆａ＝Ｆ／Ｎであるか
ら周波数変化幅は１．／Ｎと狭くなり、ＰＬＬの応答時
間を減少させることができ、高速の周波数切替えを可能
とすることができる。In the conventional embodiment, when only one frequency synthesizer is used, the frequency change width of the local oscillation frequency when switching communication channels can take a total frequency change width of F from f□ to f nm. However, in the first embodiment of the present invention, the frequency change width of the local oscillation frequency is, for example, f,
am, that is, Fa, and since Fa=F/N, the frequency change width is 1. /N, the response time of the PLL can be reduced, and high-speed frequency switching can be achieved.
なお本実施例においては周波数シンセサイザの出力周波
数が直接送信回路および受信回路に局部発振周波数信号
として供給されているが、場合によってはこの信号を送
信回路または受信回路のみ、あるいは両方とも周波数変
換して供給することも可能であり、通信周波数帯選択の
自由度を増すことができる。In this embodiment, the output frequency of the frequency synthesizer is directly supplied to the transmitting circuit and the receiving circuit as a local oscillation frequency signal, but in some cases, this signal may be frequency-converted for only the transmitting circuit, the receiving circuit, or both. It is also possible to supply the same frequency band, increasing the degree of freedom in selecting communication frequency bands.
以上説明したように本発明の無線送受信装置によれば通
信帯域内の通信チャンネルを高速に切替えることができ
るので、高速の周波数切替えの可能な自動車電話、ＴＤ
ＭＡ方式等に使用できその効果は多大である。As explained above, according to the wireless transmitter/receiver of the present invention, communication channels within the communication band can be switched at high speed.
It can be used in MA systems, etc., and its effects are great.
第１図は本発明の一実施例を示すブロック図、第２図お
よび第３図は第１図の実施例における周波数配置の例を
示す図、第４図は従来の実施例を示すブロック図である
。
１・・・送信回路、２・・・受信回路、３・・・ＲＦス
イッチ、４・・・空中線、５・・・周波数シンセサイザ
、６．７・・・周波数制御回路、１０・・・周波数シン
セサイザ群、１ ］、、−・・切替ｉ！ｌ制御回路、１
０１ａ。
１０１ｂ、１０］、ｃ、１０１ｎ−・−周波数シンセサ
イザ、１０２・・・出力切替回路。FIG. 1 is a block diagram showing an embodiment of the present invention, FIGS. 2 and 3 are diagrams showing an example of frequency allocation in the embodiment of FIG. 1, and FIG. 4 is a block diagram showing a conventional embodiment. It is. DESCRIPTION OF SYMBOLS 1... Transmission circuit, 2... Receiving circuit, 3... RF switch, 4... Antenna, 5... Frequency synthesizer, 6.7... Frequency control circuit, 10... Frequency synthesizer Group, 1 ],, -... Switch i! l control circuit, 1
01a. 101b, 10], c, 101n--Frequency synthesizer, 102... Output switching circuit.
Claims (1)
に局部発振周波数信号を供給するＰＬＬ方式の周波数シ
ンセサイザと前記周波数シンセサイザの出力周波数を通
信チャンネルに応じて設定するための周波数制御回路で
構成され、一定の周波数帯域内に多数の通信チャンネル
をもつ無線送受信装置において、局部発振周波数帯域を
複数に分割し、各分割周波数帯域毎に設けたＰＬＬ方式
の周波数シンセサイザと、前記周波数シンセサイザの出
力を選択する出力切替回路と、入力された切替信号に従
って前記出力切替回路に切替制御信号を送出する切替制
御回路を有することを特徴とする無線送受信装置。It consists of a transmitting circuit, a receiving circuit, a PLL type frequency synthesizer that supplies a local oscillation frequency signal to the transmitting circuit and the receiving circuit, and a frequency control circuit for setting the output frequency of the frequency synthesizer according to the communication channel. In a wireless transmitting/receiving device having a large number of communication channels within a frequency band, a local oscillation frequency band is divided into a plurality of parts, a PLL type frequency synthesizer is provided for each divided frequency band, and an output for selecting the output of the frequency synthesizer. A wireless transmitting/receiving device comprising: a switching circuit; and a switching control circuit that sends a switching control signal to the output switching circuit according to an input switching signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1170087A JPH0334729A (en) | 1989-06-30 | 1989-06-30 | Radio transmitter-receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1170087A JPH0334729A (en) | 1989-06-30 | 1989-06-30 | Radio transmitter-receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0334729A true JPH0334729A (en) | 1991-02-14 |
Family
ID=15898405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1170087A Pending JPH0334729A (en) | 1989-06-30 | 1989-06-30 | Radio transmitter-receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0334729A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5452290A (en) * | 1992-10-26 | 1995-09-19 | Motorola, Inc. | Look ahead channel switching transceiver |
-
1989
- 1989-06-30 JP JP1170087A patent/JPH0334729A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5452290A (en) * | 1992-10-26 | 1995-09-19 | Motorola, Inc. | Look ahead channel switching transceiver |
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