JPS633530A - Radio communication system - Google Patents
Radio communication systemInfo
- Publication number
- JPS633530A JPS633530A JP14490786A JP14490786A JPS633530A JP S633530 A JPS633530 A JP S633530A JP 14490786 A JP14490786 A JP 14490786A JP 14490786 A JP14490786 A JP 14490786A JP S633530 A JPS633530 A JP S633530A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- channel
- data
- reception
- receiving
- 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.)
- Granted
Links
- 238000004891 communication Methods 0.000 title claims description 11
- 238000000034 method Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 4
- 239000000969 carrier Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
- Transceivers (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
この発明は、複数のチャネルを周波数多重して伝送する
無線通信方式（以下５ｃｐｃ方式と略）に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a wireless communication system (hereinafter abbreviated as 5CPC system) in which a plurality of channels are frequency-multiplexed and transmitted.
（従来の技術）
一般に５ＣＰＣ方式において、チャネルの分離は周波数
変換器やフィルタを用いて用なわれる。このため、チャ
ネルの帯域に比べて無線周波数が極めて大きな場合、周
波数変換器等は極めて高い絶対周波数精度が要求される
。この要求を満たすために、従来種々のＡＦＣ方式が用
いられて来た。(Prior Art) Generally, in the 5CPC system, channels are separated using a frequency converter or a filter. For this reason, when the radio frequency is extremely large compared to the channel band, extremely high absolute frequency accuracy is required of the frequency converter and the like. In order to meet this requirement, various AFC methods have been used in the past.
−例として、パイロットキャリアを用いる方式がある。- For example, there is a method using pilot carriers.
多数チャネルのうち特定チャネルに無変調キャリアを送
出し、送出局以外の局はその無変調キャリアを周波数基
準とする方式である。This is a method in which a non-modulated carrier is sent to a specific channel among a large number of channels, and stations other than the sending station use the non-modulated carrier as a frequency reference.
しかし、パイロットキャリアを用いるＡＦＣ方式では、
パイロツ・トキ中リア専用の送信装置及び受信装置が必
要であり、小容量の通信局に於いてその占める比率は無
視できない。However, in the AFC method using a pilot carrier,
A transmitting device and a receiving device exclusively for the pilot, middle, and rear are required, and their proportion in small-capacity communication stations cannot be ignored.
また、パイロットキャリアのために周波数帯域を通常１
チャネル分占有する事になり、本来の通信に用いるチャ
ネルが減少するという問題があった。Also, one frequency band is usually reserved for the pilot carrier.
There was a problem in that the number of channels used for original communication was reduced.
（発明が解決しようとする問題点）
このように、従来のパイロ、トキ中リアを用いる方法で
は装置規模が不要に大きくなり、又、チャネルの利用効
率が低かった。(Problems to be Solved by the Invention) As described above, in the conventional method using a pyro and a toki-naka rear, the scale of the apparatus becomes unnecessarily large, and the channel utilization efficiency is low.
そこで、この発明はパイロットキャリアを用いることな
く、良好なチャネル分離が実現できる周波多重に伝送す
る無線通信方式を提供することを目的とする。Therefore, it is an object of the present invention to provide a wireless communication system that performs frequency multiplexed transmission and can achieve good channel separation without using pilot carriers.
（問題点を解決するための手段）
この発明は、送信局側の情報送信チャネルに周波数情報
を併わせで送信する手段と、受信局側の受信チャネルよ
り周波数情報を抽出する手段と、抽出した周波数情報に
よ−て受信局側の受信周波数を制御する手段とを具備す
ることにより、前記問題点を解決する方式を提供するも
のである。(Means for Solving the Problems) This invention provides a means for simultaneously transmitting frequency information on an information transmission channel on a transmitting station side, a means for extracting frequency information from a receiving channel on a receiving station side, and a means for extracting frequency information from a receiving channel on a receiving station side. The present invention provides a method for solving the above-mentioned problems by including means for controlling the receiving frequency on the receiving station side based on frequency information.
（作 用）
ｓｃｐｃシステムに於いて送信局が複数のチャネルの送
信を行なう場合、本発明（こよれば、受信局は所望のチ
ャネルであるかどうかにかかわらず、大兄の周波数域を
設定し、その中の１チヤネルを受信、復調する（仮受信
チャネル）。(Function) When a transmitting station transmits on a plurality of channels in an SCPC system, the present invention (according to this invention, a receiving station sets a large frequency range regardless of whether it is a desired channel or not, One channel among them is received and demodulated (temporary reception channel).
受信局は、仮受信チャネルから周波数情報を抽出し、所
望のチャネル周波数との周波数差を得て受信周波数を所
望のチャネル周波数へと制御する。The receiving station extracts frequency information from the temporary reception channel, obtains a frequency difference from the desired channel frequency, and controls the reception frequency to the desired channel frequency.
これによって受信周波数精度は絶対周波数精度は不要と
なり、相対周波数精度のみが必要となる。As a result, absolute frequency accuracy is no longer necessary for reception frequency accuracy, and only relative frequency accuracy is required.
（実施例）
第１図に本発明の一実施例を示し、以下に動作を説明す
る。送信側の各チャネル（ｃｔＢ〜ｃｈ３）のデータは
、多重回路ＭＸ １〜３（１１〜１３）により各チャネ
ルの周波数情報（” ｌ″〜％ｒｓ ’ ）と多重され
、送信器ＴＸＩ〜３（２１〜２３）によって高周波信号
となり、合成器（３）によって各チャネルがまとめられ
て空中へ放射される。(Embodiment) FIG. 1 shows an embodiment of the present invention, and the operation will be described below. Data of each channel (ctB to ch3) on the transmitting side is multiplexed with frequency information ("l" to %rs') of each channel by multiplex circuits MX1 to 3 (11 to 13), and sent to transmitters TXI to 3( 21 to 23) into high-frequency signals, and the synthesizer (3) combines the channels and radiates them into the air.
受信側はＶＣＯ（７）をｆ、、ｆ３の周波数領域に大略
調整シ、ｃｈｌ〜ｃｈ３ のうち１つのチャネルを受
信する。受信データは、分離回路Ｄ ｂｉ Ｘ （５１
によってチャネルデータと周波数データ’ｆｎ”とに分
離される。On the receiving side, the VCO (7) is roughly adjusted to the frequency region f, . . . f3, and receives one channel among ch1 to ch3. The received data is sent to the separation circuit D bi X (51
is separated into channel data and frequency data 'fn'.
一方、受信側には所望のチャネル周波数（−ｆｄ″）が
入力されており、’ｆｎ“と非較器（６）によ−て比較
することによって、ｆｄを受信するためにはＶＣＯをど
れだけ制御したらよいかが知れる畦これによって正確な
受信ができるばかりでなく、ＶＣＯを高い絶対周波数精
度で制御する必要がなくなる。On the other hand, the desired channel frequency (-fd'') is input to the receiving side, and by comparing it with 'fn' by a non-comparison device (6), it is determined which VCO should be used to receive fd. This not only allows for accurate reception, but also eliminates the need to control the VCO with high absolute frequency accuracy.
周波数データは例えば尚核チャネル搬送波の絶対周波数
を表わす数値である。またはチャネル番号を表わす数値
であり、受・信側では簡単な演算あるいはテーブルを用
いて絶対周波数に変換するようにしても本発明を実施で
きる。The frequency data is, for example, a numerical value representing the absolute frequency of the core channel carrier. Alternatively, it is a numerical value representing a channel number, and the present invention can be implemented by converting it into an absolute frequency using simple calculations or a table on the receiving/receiving side.
また、本実施例で（ま受信周波数の変更はＶＣＯの制御
によって行なっているが、ディジタル処理によるチャネ
ル分離フィルタ及び復調を考えた時には、局部発振器（
第１図のＶＣＯ）を固定発振器とし、フィルタ特性及び
復調器の中心周波数をディジタル的ｆこ制御して受信周
波数を変換することもできる。In addition, in this embodiment, the reception frequency is changed by controlling the VCO, but when considering the channel separation filter and demodulation using digital processing, the local oscillator (
It is also possible to convert the receiving frequency by using the VCO in FIG. 1 as a fixed oscillator and digitally controlling the filter characteristics and the center frequency of the demodulator.
また、本実施例に於いて受信局が高精度の周波数基準を
有する場合（こは受信局は受信した周波数情報と当該チ
ャネル搬送波の周波数とを比較して誤差を計算して送信
局へ通知する事が考えられる。In addition, in this embodiment, if the receiving station has a highly accurate frequency reference (in this case, the receiving station compares the received frequency information and the frequency of the channel carrier wave, calculates the error, and notifies the transmitting station) I can think of things.
これによって送信局は高精度に送信周波数を設定する事
ができる。This allows the transmitting station to set the transmitting frequency with high precision.
また、−・般にディジタル通信に於いて通信内容の秘密
を守るために暗号化を行なう場合があるが本発明を実施
する場合にチャネルの周波数データに関しては特に暗号
化を行なわないことが考えられる。これ１こよって所望
のチャネル以外のチャネルの通信秘密を保ったままで、
本発明を実施する ′事ができる。In addition, - Generally, in digital communication, encryption is sometimes performed to protect the confidentiality of communication contents, but when implementing the present invention, it is conceivable that channel frequency data is not particularly encrypted. . As a result, while maintaining the communication secrecy of channels other than the desired channel,
It is possible to carry out the invention.
また、−般にディジタル通信に於いて誤り訂正を行なう
場合があるが、本発明を実施する場合にチャネルのデー
タと周波数情報とについて異る方式の誤り訂正を適用す
る事が考えられる。これによって本発明実施時のシステ
ム設計自由度を増大することができる。Further, although error correction is generally performed in digital communications, it is conceivable to apply different methods of error correction to channel data and frequency information when implementing the present invention. This increases the degree of freedom in system design when implementing the present invention.
本発明により、受信局は高精度の受信周波数精度を用意
する必要がな（なり、そのために従来、ＮＯイロ７ト信
号を用いていた方式に比較すると１．Ｎ６イロ７ト信号
用のチャネルが不要となって周波数資源の有効利用をす
ることができる。またパイロット信号を受信するための
装置が不要となって価格の低下を図ることができる。According to the present invention, the receiving station does not need to prepare a highly accurate reception frequency (therefore, compared to the conventional system using the NO 7 signal, the number of channels for the N6 7 signal is reduced by 1. This eliminates the need for frequency resources, allowing effective use of frequency resources.Furthermore, since a device for receiving pilot signals becomes unnecessary, costs can be reduced.
第１図は、本発明の実施例を示す図である。
１１〜１３・・・多重回路、２１〜２３・・・送信機、
３・・・合成器、４・・・受信機、５・・分離回路、６
・・・比較回路、７・・・ＶＣＯ（可変周波数発振器）
。FIG. 1 is a diagram showing an embodiment of the present invention. 11-13...Multiple circuit, 21-23...Transmitter,
3... Combiner, 4... Receiver, 5... Separation circuit, 6
...Comparison circuit, 7...VCO (variable frequency oscillator)
.
Claims (1)
信方式において、送信局は送信チャネル上に該送信チャ
ネルの周波数情報を送出し、受信局は受信チャネルより
抽出した前記周波数情報に基づいて受信を制御すること
を特徴とする無線通信方式。(1) In a wireless communication system in which multiple channels are frequency-divided and transmitted, a transmitting station transmits frequency information of the transmitting channel on a transmitting channel, and a receiving station receives data based on the frequency information extracted from the receiving channel. A wireless communication method characterized by controlling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14490786A JPH0728237B2 (en) | 1986-06-23 | 1986-06-23 | Wireless communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14490786A JPH0728237B2 (en) | 1986-06-23 | 1986-06-23 | Wireless communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS633530A true JPS633530A (en) | 1988-01-08 |
| JPH0728237B2 JPH0728237B2 (en) | 1995-03-29 |
Family
ID=15373065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14490786A Expired - Lifetime JPH0728237B2 (en) | 1986-06-23 | 1986-06-23 | Wireless communication device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0728237B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003106350A (en) * | 2001-09-28 | 2003-04-09 | Hosei Brake Ind Ltd | Parking brake for vehicle |
-
1986
- 1986-06-23 JP JP14490786A patent/JPH0728237B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003106350A (en) * | 2001-09-28 | 2003-04-09 | Hosei Brake Ind Ltd | Parking brake for vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0728237B2 (en) | 1995-03-29 |
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