JPS607252A - Communication system - Google Patents
Communication systemInfo
- Publication number
- JPS607252A JPS607252A JP58115561A JP11556183A JPS607252A JP S607252 A JPS607252 A JP S607252A JP 58115561 A JP58115561 A JP 58115561A JP 11556183 A JP11556183 A JP 11556183A JP S607252 A JPS607252 A JP S607252A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- carrier wave
- auxiliary signal
- regenerated
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/22—Demodulator circuits; Receiver circuits
- H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
- H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
- H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
- H04L27/2007—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained
- H04L27/2014—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes in a piecewise linear manner during each symbol period, e.g. minimum shift keying, fast frequency shift keying
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
Description
【発明の詳細な説明】
（ａｌ 発明の技術分野
本発明は、デジタル信号によって搬送波を変ＭＡＮし、
与えられた周波数帯域内の信号に変換して伝送するデジ
タル通信方式に係り、特に多値直交振幅変調通信方式の
復調に必要な歪の少い搬゛送波の再生を容易に可能とす
る回路方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION (al) Technical Field of the Invention The present invention relates to a method of changing a carrier wave using a digital signal,
This circuit relates to digital communication systems that convert signals within a given frequency band and transmit them, and in particular enables easy reproduction of carrier waves with low distortion required for demodulation of multilevel quadrature amplitude modulation communication systems. It is related to the method.
（ｂ） 従来技術と問題点
従来、８値や１６値などの多値直交振幅ダυ１通信方式
ＱＡＭの復調ｊは、受信さｈた枦変ル１■波を中間周波
数帯（Ｉ Ｆ ？Ｆｒ ）で逓倍するなどの方法により
Ｉ９送波を再生し、これを用いてＶ調する方法が押らｈ
でいる。然し乍ら多値多位相のため伝送路において受け
る伝送歪の彩管カニ大きく、きれいなＰθ送波を抽出す
ることが困雛である。そのため被７Ａ： ｉｔ！、ｊ
（ｇ号の搬送波部分の信号成分を除去し、ここにわざと
直交性を崩して漏洩してイ８た搬送波を挿入して送信し
、受信側ではこの漏洩１針送が１を用いて被変調波を復
調する々どの方式が考案されている０
操
一方、通常の無Ａによる伝送方式では主信号の伝送とは
別に、中継区間ごとに打合せ通話や回線監視制御のため
の補助信号を挿入することが必妥である。例えば第１図
の如く主信号変調のための搬送波発振器４に、補助信号
によシ周波萎５゛変訃、（Ｆ ＩＶ＋、 ）を川けてい
る。この方式は受信側で主信号をイＡ詭する際補助信号
のＦＭによる位相変動が残り主信号の彷調特性に悪い影
響を力える。(b) Prior art and problems Conventionally, the demodulation of QAM, a multi-level orthogonal amplitude wave such as 8-value or 16-value communication system, involves converting the received wave into an intermediate frequency band (I F ?Fr ) to reproduce the I9 transmission wave by a method such as multiplying it, and use this to create a V key.
I'm here. However, due to the multi-level, multi-phase structure, the transmission distortion experienced in the transmission path is large, making it difficult to extract clean Pθ transmission waves. Therefore, 7A: it! ,j
(The signal component of the carrier wave part of the g signal is removed, and the orthogonality is intentionally broken and the leaked carrier wave is inserted and transmitted. On the receiving side, this leaked one-needle feed is modulated using 1. On the other hand, in normal A-free transmission systems, auxiliary signals for meeting calls and line monitoring and control are inserted in each relay section in addition to the main signal transmission. For example, as shown in Fig. 1, a carrier wave oscillator 4 for modulating the main signal is subjected to a frequency fluctuation of 5° (F IV +) by an auxiliary signal. When the main signal is read on the receiving side, phase fluctuations due to the FM of the auxiliary signal remain and have a negative effect on the wandering characteristics of the main signal.
（Ｃ１発明の目的
に際して伝送路の雑音の影峙を受けることの少い怜ν送
波和牛の方法をもつ通イム方式を提供することにおる。(C1) The object of the invention is to provide a communication system using a method of transmitting waves that is less affected by noise in the transmission line.
（ｄ） 発明の構成
本発明は、連続位相の２値の周波数シフトキーインク（
ＦＳＸ）変調において位相変ｉ１ｊ、ｊ指ｉ）が０５と
なる場合、すなわち通称ＭＳＫ （Ｍｉｎｉｍｕｒｎ
５ｌｌｉｆｔ Ｋｅｙｉｎｇ ）変調と呼ばわる状態の
変調を受けた４８号は、占有帯域幅が狭＜（Ｎ号の伝送
路による新刊の影響が少く、かつ周波ｇ）を２逓倍する
ことによって容易に限送波を再生することが出来る特徴
をもつ性仙に着目して４７に成される。すなわち、送信
側では一つの掬送波源を二男し、一方を主信号の多値直
交振幅変調に、他方を補助信号のＭＳＫ変Ｗ、′４に用
い両方の祉え御粘１波出力を合り′ｙシて同１１５ｒに
送出するト成とする。受信便で１袖助化刊のＭＳＫ被変
調波の周波数を２系倍してＩ・・送波を再生しこの再生
された搬送波を、主信号のや調のためのＦ」生候送波信
号とする回路構成とする。(d) Structure of the Invention The present invention provides a continuous phase binary frequency shift key ink (
FSX) modulation, when the phase change i1j, j finger i) is 05, that is, commonly known as MSK (Minimurn
5llift Keying) No. 48, which has undergone modulation in a state called modulation, has a narrow occupied bandwidth <(The influence of new publications due to the transmission path of No. N is small, and frequency g) can be easily limited by doubling it. It was created in 1947, focusing on the sex immortal, which has the characteristic of being able to regenerate. In other words, on the transmitting side, one scooped wave source is used as a second source, one is used for multilevel orthogonal amplitude modulation of the main signal, and the other is used for MSK modulation of the auxiliary signal. It is assumed that the signal is transmitted to the same 115r. In the received mail, the frequency of the MSK modulated wave published by Sosoukeka is multiplied by 2 to regenerate the I...transmission wave, and this regenerated carrier wave is used as the F'' live transmission wave for the key of the main signal. The circuit configuration is to be used as a signal.
（ｅ） 発明の灰施例 以下図面に従って本発即を説明する。(e) Ashes of invention example The present invention will be explained below with reference to the drawings.
第２図は本発明に基くディジタル辿イ１；システムの変
調器と稈訓安の一例を示す回紀図である。本図において
１００は変び１系、２００は作訴、系であり、 １伝送
路１５θによって結ばれる。ＰＣＭ笠の主信号データは
し＝！示にしていないがＶＪ列／並列変換器、ディジタ
ル／アナログ変抄器Ｗよってアナログデータ係号に変換
され例えば６４値のあ１合は各３ビツトの２系列に各々
８値のアナログデータ（Ｎ号からなる２系列のアナログ
データ（ｉ角ｌ１ｎ（邑１相信号）およびＱｉｎ（直交
信号）を生成し、変調器１０２および１０３に加えらｈ
る。変調器１０２および１０３なる２つの搬送波ＣＲが
加えられる。このチア送波ＣＲは一つの搬送波源１０１
Ｊニジ分波器１０６によって二分された搬送波信号の一
方で主信号に対するものである。（（１（の一方の搬送
波は位相同期ループ回路（ＰＬＬ＠路）の発振ｖ１０４
に加えられその中心周波数ｆｃｆ昆・送＄源１０１の周
波数に一致させと
る。ＰＬＬ ０５回路の発振器１０４はＩの他に補助信
号（２値信号）が加えられ連続位相の周波数シフトキー
イング（ＦＳＸ）変調が行われる。このＦＳＫ変潤は２
値化されて補助信号の゛１″忙対してｆｎ。FIG. 2 is a circuit diagram showing an example of a modulator and a control system of the digital trace system 1 based on the present invention. In this figure, 100 is the 1st system, and 200 is the 1st system, which are connected by 1 transmission line 15θ. Main signal data of PCM cap =! Although not shown, it is converted into an analog data code by the VJ column/parallel converter and the digital/analog converter W. For example, if 64 values are combined, 8-value analog data (N Two series of analog data (i-angle l1n (one-phase signal) and Qin (orthogonal signal) are generated and applied to modulators 102 and 103.
Ru. Two carriers CR, modulators 102 and 103, are added. This chia transmission CR has one carrier wave source 101.
One of the carrier signals split into two by the J rainbow splitter 106 corresponds to the main signal. (One carrier wave of (1) is the oscillation v104 of the phase-locked loop circuit (PLL @ path)
The center frequency of the fcf is made to match the frequency of the transmission source 101. In addition to I, an auxiliary signal (binary signal) is added to the oscillator 104 of the PLL 05 circuit, and continuous phase frequency shift keying (FSX) modulation is performed. This FSK variation is 2
It is converted into a value and the auxiliary signal "1" is used as fn.
ｏｌ＋に対してｆＩ、の周波数で搬送周波数ｆｃを中心
に挾んで確立されるが位相変調指数が０５（周波数シフ
ト量がビット−レートの半分）のときこのシフト量は１
／（２Ｔ）となる。１／Ｔにビットレートでの
ある。この状ｙ６ｆｓＫ変調信号はＭＳＫ化号信号はが
ゼロになる〕ための最小周波数間隔でちる。このＭＳＫ
伯号信号包絡線、連ワに位相、低帯域外幅側など優れた
特徴をもつ（Ｕ号であってベースバンド帯で波形整形す
ることによって非掌に厳しく帯域制御することが出来る
。従って伝送路による影響が少いため信号対雑音比の良
いｊ！；÷送波が得られる。このような悴れた特徴をも
つＭＳＫ変訃、で渉調されたそ；Ｊ栃悄号の被変欲；出
力がＰＬＬ発振器１０４よ）出力される。この神助イト
号出力は、主信号によシ変調器１０２および１０３で多
値ＱＡＭ変調された出力と合成器１０７，１．０８を介
して合成されて送出される。It is established around the carrier frequency fc at a frequency of fI for ol+, but when the phase modulation index is 05 (frequency shift amount is half the bit rate), this shift amount is 1.
/(2T). The bit rate is 1/T. This y6fsK modulated signal has a minimum frequency interval so that the MSK encoded signal becomes zero. This MSK
It has excellent characteristics such as a signal envelope, a continuous phase, and a low band width side. Because there is little influence from the signal to noise ratio, a good signal-to-noise ratio can be obtained. ;The output is output from the PLL oscillator 104). This Kamisuke Ito number output is combined with the output of the main signal subjected to multi-level QAM modulation by modulators 102 and 103 via combiners 107 and 1.08, and then sent out.
送信糸１００より送出された被変調信号ｒｖｉＯＤｏｕ
ｔは伝送路１５０を通υ受化系２００に伝送され復調器
入力ＤＥＭｉｎとなる。入力ＤＥＭｉｎね一分波器２０
８によって２つに分けられその１つＤ Ｅ Ｍ ｉ ｎ
１は主信号の往訓ｉ孔２０２および２０３に分配器２
０７を通して加えられる。もう一つの入力ＤＥＭｉｎ２
は補助信号の復Ｈｉｓ器であるディスクリミ多−夕２０
４でＦＭ彷調され祁ｊ助信号５Ｃｏｕｔを出力する。Ｄ
ＥＭｉ１２はまた、周波数逓倍器２０１で２逓培される
。Modulated signal rviODou sent out from the transmission thread 100
t is transmitted to the υ reception system 200 through the transmission line 150 and becomes the demodulator input DEMin. Input DEMin splitter 20
Divided into two by 8, one of which is D E M i n
1 is a distributor 2 to the main signal output i holes 202 and 203.
Added through 07. Another input DEMin2
is a disc limiter 20 which is an auxiliary signal restorer.
4, and outputs the FM signal 5Cout. D
EMi 12 is also doubled by frequency multiplier 201 .
位相変調指数が０５のＭ Ｓ Ｋ （８号の特徴として
２逓倍すると中心の搬送周波数が再生されるので周波数
逓倍器２０１からはトｆ送周鼓数ｆｃがゼ」生される。M S K (No. 8) with a phase modulation index of 05 is characterized by the fact that when it is doubled, the center carrier frequency is reproduced, so the frequency multiplier 201 generates the number of beats fc.
この再生搬送波ＣＲ’は一つはその壕ま同期検波器２０
２に加えられ、もう一つはフだけ位相を外らせて同期検
波器２０３に加えられて夫々主信号のＰＣ゛Ｍ出力Ｉｏ
ｕｔとＱｏｕｔとを復調出力する。This regenerated carrier wave CR' is one of its trenches and a synchronous detector 20.
2 and the other is added to the synchronous detector 203 with a phase difference of
It demodulates and outputs ut and Qout.
（ｆ） 発明の効果
実施例で詳述したごとく、本発明によれば搬送波再生は
補助信号の受信波の周波数を２逓倍するだけの簡単な回
路で、かつＭＳＫ信号の特徴によシ途中の伝送路の影響
を受けることが少いので信号対雑音比の良い搬送波が得
られるので本発明の効釆ｔｉ太きい。(f) Effects of the Invention As described in detail in the embodiments, according to the present invention, carrier wave regeneration is a simple circuit that doubles the frequency of the received wave of the auxiliary signal, and the carrier wave regeneration is performed using a simple circuit that doubles the frequency of the received wave of the auxiliary signal. Since it is less affected by the transmission path, a carrier wave with a good signal-to-noise ratio can be obtained, so the effectiveness of the present invention is great.
第１図は従来の之：訓回路、第２図ａ本発１明による変
に１□′１１回路と復訊；回路である。
図において、１００は送信系、１０１は搬送波曲、１０
２．１０３はＱＡＭ笈調器、１０４はＦＳＫ変調器、Ｚ
ｏｏは受信系、２０１は周波数２逓伯器、２０２゜２０
３は同期復調器、２０４Ｉ″ｉＦＭ復調器である。
手続補正書（自船
昭和 で１ 月 １１
５９、 ６．１１
’４’＋ｉ、許庁長宮殿
３ 補止をする古
小１゛１との閏傅 １旨’１’ｆｌ暫イ１人ｆｉｇ 所
神＜’Ｔ川用川崎山中１＋：ｉｌ＜ ｌ小ｌｌｌ中１０
１５ｆｉ地（５２２）名（う、富士通株式会社
４ 代 理 人 Ｉｆ： １ｉハ 神６〈用県川崎山中
１１；ｌメ１１ｊ・１１１１１１１０１５番地富士通株
式会社内
（１〕 明細書第５頁第６行の「補助信号」を［補助信
号ＳＣＪと補正する０
（２）明細書第７頁第８行の「だけの ・・・・・によ
シ」を以下のように補正する０
「だけの簡単な回路で行なうことできる。また、ＭＳＫ
信号の特徴により」FIG. 1 shows a conventional circuit, and FIG. 2 shows a circuit according to the present invention. In the figure, 100 is a transmission system, 101 is a carrier wave tune, 10
2.103 is QAM modulator, 104 is FSK modulator, Z
oo is the receiving system, 201 is the frequency 2 multiplier, 202゜20
3 is a synchronous demodulator, 204I''iFM demodulator. Procedural amendment (own ship Showa, January 11 59, 6.11 '4'+i, Office Director's Palace 3 1 story '1' fl temporary one person fig Tokorokami<'T river Kawasaki Yamanaka 1+:il< l Elementary junior high school 10
15fi Address (522) Name (U, Fujitsu Ltd. 4 Representative Person If: 1i Ha Kami 6〈11, Yamanaka, Kawasaki, Prefecture; 11j, 1111111015, Inside Fujitsu Ltd. (1) Page 5, Line 6 of the specification Correct the "auxiliary signal" with [auxiliary signal SCJ0 (2) Correct "only...yoshi" on page 7, line 8 of the specification as follows0 "only simple" The MSK
"Depending on the characteristics of the signal."
Claims (1)
シ同時に伝送する通信方式において、逆利用し、他方の
搬送波は補助信号入力の位相変調指数が０５となる連Ｕ
１；位相周波数シフトキーインク変調（ＦＳＫ）に利用
し、受イム側では受信された補助信号ＦＳＫ被変訓波よ
υ搬送波を再生し、この和牛搬送波によυ主信号を彷■
−することを特徴とした通信方丈。In a communication system that simultaneously transmits main signal data and auxiliary signal data using carrier wave band transmission, the other carrier is used as a series U with a phase modulation index of 05 for the auxiliary signal input.
1; Used for phase frequency shift key ink modulation (FSK), and on the receiving side, the received auxiliary signal FSK modified wave and the υ carrier wave are regenerated, and this Wagyu carrier wave is used to reproduce the υ main signal.
- A communication hojo characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58115561A JPS607252A (en) | 1983-06-27 | 1983-06-27 | Communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58115561A JPS607252A (en) | 1983-06-27 | 1983-06-27 | Communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS607252A true JPS607252A (en) | 1985-01-16 |
| JPH059979B2 JPH059979B2 (en) | 1993-02-08 |
Family
ID=14665586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58115561A Granted JPS607252A (en) | 1983-06-27 | 1983-06-27 | Communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS607252A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4852408A (en) * | 1971-11-04 | 1973-07-23 |
-
1983
- 1983-06-27 JP JP58115561A patent/JPS607252A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4852408A (en) * | 1971-11-04 | 1973-07-23 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH059979B2 (en) | 1993-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4229821A (en) | System for data transmission by means of an angle-modulated carrier of constant amplitude | |
| CA1063178A (en) | Modulation and filtering device | |
| US4355397A (en) | Full duplex communication system for voice grade channels | |
| US4092596A (en) | Data transmission and reception system | |
| US4531221A (en) | Premodulation filter for generating a generalized tamed frequency modulated signal | |
| US3522537A (en) | Vestigial sideband transmission system having two channels in quadrature | |
| US4780884A (en) | Suppressed double-sideband communication system | |
| US3723880A (en) | System for the transmission of multilevel data signals | |
| US4074199A (en) | Vestigial-sideband transmission system for synchronous data signals | |
| US3588702A (en) | Transmitter for single sideband transmission bivalent of pulse | |
| US3466392A (en) | Vestigial sideband frequency shift keying modem | |
| US4217467A (en) | Amplitude and periodic phase modulation transmission system | |
| US3718766A (en) | Wide band multiplexing system | |
| US4500856A (en) | Simplified minimum shift keying modulator | |
| US5940365A (en) | AM data multiplexing modulation apparatus | |
| US3378770A (en) | System for quadrature modulation of ternary signals with auxiliary oscillation for use in carrier regeneration at receiver | |
| US3152305A (en) | Bipolar binary digital data vestigial sideband system | |
| JPH0542863B2 (en) | ||
| CA1132270A (en) | Digital multi-level multi-phase modulation communication system | |
| US3701852A (en) | Transmission system and associated transmitters and receivers for the transmission of synchronous pulse signals | |
| JPH06311507A (en) | Differential encoding quadrature phase transition modulation method and apparatus thereof | |
| US4622683A (en) | Fast acquisition ringing filter MSK demodulator | |
| JPS607252A (en) | Communication system | |
| US4250456A (en) | Device for demodulating PSK-FM double modulated carrier signals | |
| US4166923A (en) | Amplitude- and periodic phase-modulation transmission system |