JPS60169963U - Transmitter for digital signal transmission - Google Patents
Transmitter for digital signal transmissionInfo
- Publication number
- JPS60169963U JPS60169963U JP5753384U JP5753384U JPS60169963U JP S60169963 U JPS60169963 U JP S60169963U JP 5753384 U JP5753384 U JP 5753384U JP 5753384 U JP5753384 U JP 5753384U JP S60169963 U JPS60169963 U JP S60169963U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- digital signal
- transmitter
- amplifier
- points
- 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
Landscapes
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第1図は本考案の送信機の概要を示すブロック図、第2
図および第4図はそれぞれ本考案の送信機における直交
変調器の第1および第2の実施例を示すブロック図、第
3図および第5図はそれぞ 。
れ本考案の送信機における直交変調器の第1および第2
の実施例に対する信号点配置および軌跡を示す複素振幅
平面図、第6図は本考案の送信機における増幅器の実施
例を示すブロック図、第7図は増幅器の入出力特性を説
明するための図である。これらの図において、120は
直交変調器、130.250,450は局部発振器、1
31゜240.455は位相差分離回路、132,23
1.232,441,442,443,444はミクサ
、140は増幅器、150,540は信号比較回路、1
60は送信アンテナ、221,222.431,432
,433.434は低域通過フィルタ、260,460
は加算回路、520は位相可変回路、530は利得可変
増幅器、541.542は振幅検波器、543は減算回
路、544は位相検波器である。Figure 1 is a block diagram showing an overview of the transmitter of the present invention, Figure 2
4 and 4 are block diagrams respectively showing first and second embodiments of a quadrature modulator in a transmitter of the present invention, and FIGS. 3 and 5, respectively. The first and second quadrature modulators in the transmitter of the present invention
FIG. 6 is a block diagram showing an embodiment of the amplifier in the transmitter of the present invention, and FIG. 7 is a diagram for explaining the input/output characteristics of the amplifier. It is. In these figures, 120 is a quadrature modulator, 130, 250, 450 is a local oscillator, 1
31°240.455 is a phase difference separation circuit, 132, 23
1. 232, 441, 442, 443, 444 are mixers, 140 is an amplifier, 150, 540 is a signal comparison circuit, 1
60 is a transmitting antenna, 221, 222. 431, 432
, 433.434 is a low pass filter, 260, 460
520 is an adder circuit, 520 is a variable phase circuit, 530 is a variable gain amplifier, 541, 542 is an amplitude detector, 543 is a subtraction circuit, and 544 is a phase detector.
Claims (1)
調器出力を増幅する増幅器とからなるディジタル信号伝
送用送信器であって、前記直交変調器は複素振幅平面上
で規定される信号点を位相の順番に並べて、位相につい
て順次1個おきに取って得られる信号点の全体を第1の
信号点グループとし、残りの信号点の全体を第2の信号
点グループとするとき、第1の信号点のグループと第2
の信号点グループのうちの送信ディジタル信号に対応す
る1つの信号点を時間的に交互に選択する直交変調器で
あり、前記増幅器はその入力信号とその出力信号の振幅
あるいは位相あるいはこれらの双方を比較して得られる
誤差信号によって帰還制御を施す構成の増幅器であるこ
とを特徴とするディジタル信号伝送用送信機。A transmitter for digital signal transmission comprising a quadrature modulator that receives a transmitted digital signal as a modulation input and an amplifier that amplifies the output of the modulator, the quadrature modulator converting signal points defined on a complex amplitude plane into phases. The first signal point group is the first signal point group, and the remaining signal points are the second signal point group. Group of points and second
The amplifier is a quadrature modulator that temporally alternately selects one signal point corresponding to a transmitted digital signal from a group of signal points, and the amplifier modulates the amplitude and/or phase of its input signal and its output signal. 1. A transmitter for digital signal transmission, characterized in that it is an amplifier configured to perform feedback control using an error signal obtained by comparison.
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5753384U JPS60169963U (en) | 1984-04-19 | 1984-04-19 | Transmitter for digital signal transmission |
US06/722,256 US4817116A (en) | 1984-04-17 | 1985-04-12 | Digital radio communication system utilizing quadrature modulated carrier waves |
AU41074/85A AU589119B2 (en) | 1984-04-17 | 1985-04-12 | Digital radio communication system utilizing quadrature modulated carrier waves |
NO85851489A NO169269C (en) | 1984-04-17 | 1985-04-15 | DIGITAL RADIO COMMUNICATION SYSTEM |
CA000479247A CA1236168A (en) | 1984-04-17 | 1985-04-16 | Digital radio communication system utilizing quadrature modulated carrier waves |
SE8501861A SE460326B (en) | 1984-04-17 | 1985-04-16 | DIGITAL RADIO COMMUNICATION SYSTEM USING QUADRATURE-MODULATED EMERGENCIES |
FI851513A FI80175C (en) | 1984-04-17 | 1985-04-16 | Digital telecommunication system where quadrature modulated carrier signals are used |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5753384U JPS60169963U (en) | 1984-04-19 | 1984-04-19 | Transmitter for digital signal transmission |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60169963U true JPS60169963U (en) | 1985-11-11 |
JPH0543555Y2 JPH0543555Y2 (en) | 1993-11-02 |
Family
ID=30582153
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5753384U Granted JPS60169963U (en) | 1984-04-17 | 1984-04-19 | Transmitter for digital signal transmission |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60169963U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012023512A (en) * | 2010-07-14 | 2012-02-02 | Nec Corp | Receiver and transmitter |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3900823A (en) * | 1973-03-28 | 1975-08-19 | Nathan O Sokal | Amplifying and processing apparatus for modulated carrier signals |
JPS5637756A (en) * | 1979-09-05 | 1981-04-11 | Nec Corp | Transmitting device for time-division multiple connection system |
-
1984
- 1984-04-19 JP JP5753384U patent/JPS60169963U/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3900823A (en) * | 1973-03-28 | 1975-08-19 | Nathan O Sokal | Amplifying and processing apparatus for modulated carrier signals |
JPS5637756A (en) * | 1979-09-05 | 1981-04-11 | Nec Corp | Transmitting device for time-division multiple connection system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012023512A (en) * | 2010-07-14 | 2012-02-02 | Nec Corp | Receiver and transmitter |
Also Published As
Publication number | Publication date |
---|---|
JPH0543555Y2 (en) | 1993-11-02 |
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