JPS6022830A - Heterodyne type transmitter - Google Patents
Heterodyne type transmitterInfo
- Publication number
- JPS6022830A JPS6022830A JP13026983A JP13026983A JPS6022830A JP S6022830 A JPS6022830 A JP S6022830A JP 13026983 A JP13026983 A JP 13026983A JP 13026983 A JP13026983 A JP 13026983A JP S6022830 A JPS6022830 A JP S6022830A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- signal
- comparator
- detector
- high frequency
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はＰＯＭ ＰＳＫ中間周波変調波を高周波に周波
数変換して送信するヘテロゲイン型送信機に門するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a hetero gain type transmitter that frequency converts a POM PSK intermediate frequency modulated wave to a high frequency and transmits the same.
現在、マイクロ波帯ディジタル無線機は多値ＰＳＫ変調
が主流である。−、グ、ざ相中同周波ＰｓＫ変調波（以
下ＩＦ ＰＳＫ信号と略記する）は帯域制限をうける事
により、中間周波（ＩＦ）のエンベロープにＡＭ分が生
ずる。無線機の送信スペクト２ムｔ」。Currently, multilevel PSK modulation is the mainstream for microwave band digital radio equipment. The same frequency PsK modulated wave (hereinafter abbreviated as IF PSK signal) in the −, G, and phase phases is band-limited, so that an AM component occurs in the envelope of the intermediate frequency (IF). Radio transmission spectrum 2mt.
なるべく狭い事が望まれ、無線機の非直線歪はＩＦで帯
域制限されたスペクトラムを広げる方向に作用するので
、この非直線歪ｔｅ１．極力小さくしなければならない
。この非直線歪に柚イＲする簡易で経済的な方法として
は第１図に示す如き方式がある。It is desired that the non-linear distortion is as narrow as possible, and since the non-linear distortion of the radio equipment acts in the direction of widening the band-limited spectrum by the IF, this non-linear distortion te1. It must be made as small as possible. As a simple and economical method for dealing with this non-linear distortion, there is a method as shown in FIG.
なお非直線歪にｊ」： ＡＭ−ΔＭ変換歪とＡＭ −Ｐ
Ｍ変換歪があるが、本発明ではＡ↑４−へＭ変換歪を補
償する事に目的を限定した。Note that the nonlinear distortion is: AM-ΔM conversion distortion and AM-P
Although there is M conversion distortion, the purpose of the present invention is limited to compensating for M conversion distortion to A↑4-.
第１図において、振幅変周波の一部を結合器ｌＳで取り
出し、第１の検波器３で検波してベースバンド信号とし
比較器Ｓに加える。一方、振幅変貌器／？、増幅器ｌ／
′ｌｃ通し一部を結合器／Ａで取り出し、第一の＠波器
／４で検波してベースバンド（Ｆ！号として比較器Ｓで
両者を比較し、その差分を振幅変ε１器１７に加え、振
幅変ｎ１する。この系全体としてベースバンド信号の変
化に十分追随できれば非直線歪を軽減できる。In FIG. 1, a part of the amplitude-variable wave is taken out by a coupler IS, detected by a first detector 3, and applied to a comparator S as a baseband signal. On the other hand, amplitude transformer/? , amplifier l/
A part of the signal through the 'lc is taken out by the coupler/A, detected by the first @ wave generator/4, and compared with the baseband (F!) by the comparator S, and the difference is sent to the amplitude converter ε1 17. In addition, the amplitude is changed n1.If this system as a whole can sufficiently follow changes in the baseband signal, nonlinear distortion can be reduced.
この方式の欠点としては、帰還回路全体の応答速度がベ
ースバンドの最高周波数分のｌの時間よシも十分早くな
ければいけない事と、変調器／７を使っている事から大
きな非直線歪をもつ系は改善が太きいが、比較的小さな
非直線歪をもつ系をさらに大きく改善する事は翔しいと
いう欠点があった。The disadvantages of this method are that the response speed of the entire feedback circuit must be sufficiently faster than the time l for the highest frequency of the baseband, and because it uses a modulator/7, large nonlinear distortion can occur. Although the improvement is large for systems with relatively small nonlinear distortions, it has the disadvantage that it is difficult to further improve systems with relatively small nonlinear distortions.
本発明は上記事情に鑑みてなされたものであり、従って
本発明の目的は、かかる欠点を克服し２、かつ経済的に
簡易な方法による新Ｗ１なヘテロク”イン型送信機を提
供することにある。The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to overcome such drawbacks and provide a new W1 heteroquinrox-in type transmitter by an economically simple method. be.
」ユ記目的を達成する為に、本発明に係るヘテローブ波
形がＡＭ分を持つ事を利用しこの中間周波のエンベロー
プ波形を検波する第１＜７）検波器と、中間周波を送信
高周波に変換する周波数変換器と、この周波数変換器に
より周波数変換された高周波を増幅する高周波増幅器と
、前記高面Ｐ増中Ａ器の後につづく送信高周波のエンベ
ロープを検波する第一の検波器と前記第１及びｆ４．２
の検波器の出力を比較してその差分を検出する比較器と
全備えて構成され、前記比較器の出力全前記第１の検波
器と前記周波数変換器の間に挿入された前置非直近１歪
補償器に入力し、中間周波のエンベロープ波形と高周波
のエンベロープ波形が等（２くなる様にして送（８機の
非直線歪をキャンセルする事を９徴とする。In order to achieve the purpose of this article, a 1<7) detector is provided which detects the envelope waveform of this intermediate frequency by utilizing the fact that the heterolobed waveform according to the present invention has an AM component, and converts the intermediate frequency into a transmission high frequency. a high-frequency amplifier that amplifies the high-frequency wave frequency-converted by the frequency converter; a first detector that detects the envelope of the transmitted high-frequency wave following the high-surface P amplifier A; and the first detector. and f4.2
and a comparator for comparing the outputs of the first wave detector and detecting the difference, and the first non-nearest detector is inserted between the first wave detector and the frequency converter. 1 input to the distortion compensator, and send it so that the intermediate frequency envelope waveform and the high frequency envelope waveform are equal (2) (cancelling the nonlinear distortion of 8 devices is assumed to be 9 characteristics).
次に本発明をその好ましい一実施例について図面を参照
しながら具体的に説明しよう。Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.
本発明の一実施例を第２図に示す。入力端子ｌから入力
されたＩＦ ｒｌｌＪＫ信号は、ＩＦ増幅器λにて増幅
された後に１部（ｌよ第１の検波器３にてＩＦのエンベ
ロープを検波され、遅延線ダ憂通った後に比較器Ｓに入
力される。これを径路／の検波出力と］る。An embodiment of the present invention is shown in FIG. The IF rllJK signal input from the input terminal 1 is amplified by the IF amplifier λ, and then the IF envelope is detected by the first detector 3, and after passing through the delay line, the IF rllJK signal is amplified by the IF amplifier λ. This is input to S. This is referred to as the detection output of path /.
他の］：Ｆ ＰＳＫ信号ｔ」１、前置非直線歪補償回路
（ＭｔＦｉ ＤＩｓＴｏ＋ｒｒｏｕ ）Ａに入力され１
局部発掘器ｇと混合器７と帯域通過ろ波器グからなる周
波数及換器１０にて＋１周波信号（ＲＦ倍信号に変換さ
れた後にＲＦ増幅器／／にて増幅され、送信出力端子／
Ｊに大部分出て行き、一部はｉｎ２の倹１１ｔＬ器／ス
にて、ＲＦのエンベロープ検波さｉｔだ後に比較器！に
入力される。Other]: F PSK signal t'1, input to the pre-nonlinear distortion compensation circuit (MtFi DIsTo+rrou) A1
A +1 frequency signal (converted to an RF multiplied signal by a frequency converter 10 consisting of a local excavator g, a mixer 7, and a band-pass filter g) is amplified by an RF amplifier //, and a transmission output terminal /
Most of it goes to J, and some of it goes to in2's 11tL device/s, where it is used for RF envelope detection and then a comparator! is input.
これをｔη路、２の１へ波出力とする３、比較器ｊにて
径路ｌと径路λのエンベロープ検波された波形が比較さ
れ、この差分が検出された後に低域通過ろ波器又は積分
器／４’を通してｖｉＪ置非直縄歪補ｆバ回ｙｅｓ ｔ
に入力され、そこで差分をなくする様にされる。This is output as a wave output to path tη and 1 of 2. 3. In comparator j, the envelope-detected waveforms of path l and path λ are compared, and after this difference is detected, a low-pass filter or an integrator Yes t
, and the differences are removed there.
この様に回路を構成する事により、常温ではＬＯＯＰ衾
切り開いて前置非直線歪補償回ドロ乙を非直線歪を補償
する様に設定し、温度、経時変化等の変化量をＬＯＯＰ
で補償する様にする事によって、非直線歪が比較的小さ
な送信機の歪をさらに大きく改善する事が可能である。By configuring the circuit in this way, the LOOP is opened at room temperature, and the pre-nonlinear distortion compensation circuit is set to compensate for nonlinear distortion, and the amount of change due to temperature, changes over time, etc. can be adjusted to the LOOP.
By compensating with
又、検波器Ｊ、／コ、比較器Ｓは信号スピードに追随す
る必要があるが、帰還系全体としては信号スピードに追
随する必要はなく、ｗ度変化、経時変化等のゆりくシし
た変化に追随できれば良い。In addition, although the detectors J, /, and comparator S need to follow the signal speed, the feedback system as a whole does not need to follow the signal speed, and it is not necessary to follow the signal speed due to slow changes such as degree changes or changes over time. It would be good if we could follow.
この為に、低域ろ波器又は積分器／ｌ／、を入れろ小が
できる。又、序延線りｔよｆｆ５ｔの径路と第一の径路
のｔ覗気長を合わせる事に有効な手段を提供」−る。For this purpose, it is possible to insert a low-pass filter or an integrator /l/. In addition, an effective means is provided for matching the path of the forward and extension line t to ff5t with the t peeking length of the first path.
又、検波器Ｊ、Ｉコの非直線歪と、このｉ′１情度メニ
化、経時変化等によって径路ｌ９．２の検波されたエン
ベロープ波形に変化が生じ、比較器Ｓの出力にこの差分
が出力される。これを防ぐ為にｆｉ／と氾４の検波器の
特性を揃え、かつ動作点を同一にすＺ。In addition, due to the nonlinear distortion of the detectors J and I, this i'1 sensitivity change, and changes over time, the detected envelope waveform of the path l9.2 changes, and the output of the comparator S changes due to this difference. is output. In order to prevent this, the characteristics of the fi/ and flood 4 detectors are made the same, and the operating points are made the same.
１Ｖは有効である。1V is valid.
仏 図面の筒片なｄ；７１明
第１［Σ１はｉ；ｒ来の非直線歪補償方式を説明する為
の図、第、２図は本発明に係るー＼１０ダイン型送信偽
の非直縮歪ｆｉｔ仏回）’、ｍの一実が１１例を示すブ
ロック図である。Figures 1 and 2 are diagrams for explaining the nonlinear distortion compensation method of the present invention. FIG. 12 is a block diagram showing 11 examples of direct contraction strain fit Buddha times)', m.
／・・・入力端子、−・・・ＩＦＩＩ幅器、、７．／、
２・・・検波器、り・・・遅延線、Ｓ・・・比較器、＾
・・・前置非直線歪補償器、７・・・晶庁器、Ｋ・・・
局部発振器、デ・・・帯域通、過ろ波器、１０・・・周
波ノ；（り■換器、／／・・・高周波増幅器、／３・・
・出力端子、／＜′・・・低暁、へ過ろ波器又（よ積分
器、／！ｒ、／ｌ、・・・方向性結合器、／７・・・振
梠変ｈ１器特許出願人 日本市５気株式会社/...input terminal, -...IFII width converter, 7. /,
2...Detector, R...Delay line, S...Comparator, ^
...Pre-nonlinear distortion compensator, 7...Shochoki, K...
Local oscillator, de... band pass, filter, 10... frequency converter, //... high frequency amplifier, /3...
・Output terminal, /<'... low light, filter or integrator, /!r, /l,... directional coupler, /7... oscillator transformer h1 patent Applicant: Nippon City Gokki Co., Ltd.
Claims (3)
帯域制限された事に上シ中間周波のエンベロープ波形が
ＡＭ分を持つ事を利用しこの中間周波のエンベロープ波
形を検波するｍ ／の検波器と、中間周波を送信高周波
に変換する周波数変換器と、この周波数変換器により周
波数変換された高周波を増幅する高周波増幅器と、前記
高周波増４〜器の後につづく送信高周波のエンベロープ
を検波する第ユの検波器と、前記第１及び第一の検波器
の出力を比較してその差分を検出する比較器とを備え、
前記比較器の出力を前記第１の検波器と前記周波数変換
器の間に挿入された前（１′ｌ非直線歪補償器に入力し
、中間周波のエンベロープ波形と高周波のエンベロープ
波形が等しくなる様にｌ−で送信機の非直線歪をギャン
セルする事を特徴としたヘテロゲイン型送信機。(1) PCM PSK The intermediate frequency signal converted to N'1 is band-limited, and the envelope waveform of the intermediate frequency has an AM component. This is used to detect the envelope waveform of the intermediate frequency. m/detection a frequency converter for converting an intermediate frequency into a transmission high frequency; a high frequency amplifier for amplifying the high frequency frequency converted by the frequency converter; and a frequency converter for detecting the envelope of the transmission high frequency following the high frequency amplifier a comparator that compares the outputs of the first and first detectors and detects the difference;
Before the output of the comparator is inserted between the first detector and the frequency converter (1'l), the output is input to a nonlinear distortion compensator so that the intermediate frequency envelope waveform and the high frequency envelope waveform are equal. This is a hetero gain type transmitter characterized by canceling the non-linear distortion of the transmitter with l-.
続した事を更に特徴とする特許請求範囲第（ハ項に記載
のヘテロダイン型送信機。(2) The heterodyne transmitter according to claim 3, further characterized in that a delay line is connected between the first detector and the comparator.
を実質的に同一とし、かつ動作点も実質的に同一にする
事により、前記第１と第一の検波器に起因する歪を実質
的に同一にして無視できる様にした事を更に特徴とする
特許請求範囲第（ハ項に記載のヘテロゲイン型送信機。(3) By making the detection characteristics of the first detector and the first detector substantially the same and also making the operating points substantially the same, it is possible to The hetero gain type transmitter according to claim 1 (c), further characterized in that the distortion caused by the distortion is made substantially the same so that it can be ignored.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13026983A JPS6022830A (en) | 1983-07-19 | 1983-07-19 | Heterodyne type transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13026983A JPS6022830A (en) | 1983-07-19 | 1983-07-19 | Heterodyne type transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6022830A true JPS6022830A (en) | 1985-02-05 |
Family
ID=15030250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13026983A Pending JPS6022830A (en) | 1983-07-19 | 1983-07-19 | Heterodyne type transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6022830A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01276809A (en) * | 1988-04-28 | 1989-11-07 | Toshiba Corp | Automatic gain control circuit |
| JPH0590855A (en) * | 1991-09-30 | 1993-04-09 | Nec Corp | Agc circuit |
| JP2881187B2 (en) * | 1990-10-31 | 1999-04-12 | ノーザン・テレコム・リミテッド | Radio frequency power amplifier clipping control method and transmitter for radio frequency communication system |
| EP1289129A1 (en) * | 2001-08-31 | 2003-03-05 | Hitachi Kokusai Electric Inc. | Amplifying device using predistortion |
-
1983
- 1983-07-19 JP JP13026983A patent/JPS6022830A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01276809A (en) * | 1988-04-28 | 1989-11-07 | Toshiba Corp | Automatic gain control circuit |
| JP2881187B2 (en) * | 1990-10-31 | 1999-04-12 | ノーザン・テレコム・リミテッド | Radio frequency power amplifier clipping control method and transmitter for radio frequency communication system |
| JPH0590855A (en) * | 1991-09-30 | 1993-04-09 | Nec Corp | Agc circuit |
| EP1289129A1 (en) * | 2001-08-31 | 2003-03-05 | Hitachi Kokusai Electric Inc. | Amplifying device using predistortion |
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