| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 221 | Pole loop transmission circuit | JP2001346713 | 2001-11-12 | JP3698669B2 | 2005-09-21 | グンテル，クラウト; シャオピン，ツァング; シュテファン，ヘルジンガー; マルティン，シモン; ミヒャエル，アサム |
| 222 | How cancellation from the amplitude modulation of Rf amplifier to the phase modulation | JP2000587434 | 1999-11-16 | JP3524498B2 | 2004-05-10 | キャンプ、ウィリアム、オー、ジュニア; ゴア、チャールズ; シュラング、ジェフリー、エイ; マンナーシュトラーレ、ヤコブ |
| 223 | Transmitter and method for reducing adjacent channel power | JP2003037576 | 2003-02-17 | JP2003289256A | 2003-10-10 | HOLMQVIST PETER BO |
| <P>PROBLEM TO BE SOLVED: To provide a transmitter for improving spectral characteristics by reducing an out of band special emission. <P>SOLUTION: The transmitter 25 includes a phase modulator 35 for modifying a phase of a reception signal, a power amplifier 45 for receiving and amplifying the phase modified signal, and an amplitude modulator 50 for receiving the amplified phase-modified signal and modifying the amplitude of the amplified phase-modified signal. Since the phase and amplitude modulation are performed sepalately in order to minimize an amplitude distortion without complicating the design of the phase modulator, the out of band spectral emission of the transmitted output signal is removed by the combined effect of the phase and amplitude modulation. The transmitter 25 can store the phase shift and amplitude modulation information in a table for a variety of different input data sequences, such that the phase shift and amplitude modulation information need merely be looked in the table as opposed to being calculated in response to each digital signal input. <P>COPYRIGHT: (C)2004,JPO | ||||||
| 224 | Quadrature modulator having a carrier leakage compensation | JP2000607325 | 2000-03-06 | JP2002540665A | 2002-11-26 | ペーター、ストローエト; リシ、モヒンドラ |
| (57)【要約】 セットアンドフォーゲットの搬送波漏れ補償を有する直角変調器。 直角変調器は、同相および直角枝路を含む。 同相および直角枝路において、リアルタイムディジタル信号がアナログ信号に変換され、そのアナログ信号がフィルタ処理され、フィルタ処理されたアナログ信号が搬送波信号および搬送波信号の９０度位相シフトされたものでそれぞれ変調される。 変調された同相および直角信号が、直角振幅変調信号を形成するように加えられる。 好ましくは、直角変調器の電源を投入する時に、同相および直角枝路において、搬送波漏れが測定される。 測定された搬送波漏れは比較器に供給され、搬送波漏れがそれぞれの同相および直角枝路で最小である時に、比較器は切り換わる。 直角変調器の電源を投入する時に、ステートマシンが、同相および直角枝路に補償信号を注入する信号発生器を始動させ、その結果、同相および直角枝路の直流オフセットが減少し、それによって、同相および直角枝路の搬送波漏れを減少させる。 比較器が切り換わる時に、ステートマシンは対応する信号発生器を制御することを停止させるように命令され、その時に、その信号発生器の出力信号は凍結される。 | ||||||
| 225 | Circuit and method for linearizing the amplitude modulation in the power amplifier | JP2000583157 | 1999-11-04 | JP2002530917A | 2002-09-17 | アルパイア、ドメニコ; キャンプ、ウイリアム、オー、ジュニア; ゴア、チャールズ; シラング、ジェフリー; ボエシュ、ロナルド、ディ |
| (57)【要約】 送信すべきＲＦ入力信号を発生する発振器をＲＦ増幅器が含んでいる。 前記ＲＦ入力信号を電力増幅回路が受信し、該ＲＦ入力信号を増幅してＲＦ出力信号を発生する。 前記発振器および前記電力増幅回路には増幅器制御回路が作動的に関連しており、この増幅制御回路はＲＦ出力信号の所望する振幅を示す制御信号を発生するための手段を含む。 メモリ手段は前記制御信号に対しＲＦ出力信号の実際の振幅を相関化する補正情報を記憶する。 所望する振幅に対する補正情報に応答して変更された制御信号を使って制御手段が電力増幅回路の電源電圧を変えるようになっている。 | ||||||
| 226 | Method and apparatus for generating a linear modulation signal using polar spatial modulation | JP2000575213 | 1999-10-06 | JP2002527921A | 2002-08-27 | ヘカン エリクソン，; ベニート リンドフ， |
| (57)【要約】 極座標空間変調システムにおいて線形変調信号を生成するための装置および方法。 送信のための信号は位相成分と振幅成分とに分離され、位相変調器において搬送波信号が位相成分で変調され、このときに位相歪みを生じる。 補償回路が、振幅成分を修正することで位相変調器により生じた位相歪みを補償する。 位相変調された搬送波信号は、補償された振幅成分によって変調されて線形変調信号を生成する。 | ||||||
| 227 | Polar loop transmission circuit | JP2001346713 | 2001-11-12 | JP2002208864A | 2002-07-26 | ASAM MICHAEL; HERZINGER STEFAN; KRAUT GUNTHER; SIMON MARTIN; ZHANG XIAOPIN |
| PROBLEM TO BE SOLVED: To provide a polar loop transmission circuit having only small energy demand, which is suitable for transmission in mobile radio system accompanied by phase modulation and amplitude modulation and transmission in a time slot. SOLUTION: A transmission signal and a feedback signal in the transmission circuit are decomposed into polar elements (phase and amplitude) and they are compared with each other for phase modulation and amplitude modulation. An amplitude modulator AM is placed behind an oscillator VCO and is constituted of a non-linear amplifier operated in a saturation state. An amplifier PV, arranged in a feedback route RK, makes the output signal of the amplitude modulator AM to attenuated. The transmission circuit shows phase modulation and amplitude modulation and is volatile for a future mobile object radio system conforming, for example to known GSM standard. COPYRIGHT: (C)2002,JPO | ||||||
| 228 | Vector modulation system, vector modulator | JP27338991 | 1991-09-25 | JP3226577B2 | 2001-11-05 | トーマス・エム・ヒギンズ・ジュニア; マーカス・ケイ・ダシルバ; ロバート・ジェイ・コンレイ |
| 229 | Radio frequency signal generator | JP2000176120 | 2000-05-09 | JP2001045079A | 2001-02-16 | WILSON NIGEL; HILLUM RICK A |
| PROBLEM TO BE SOLVED: To provide a radio frequency signal generator that can generate a broadband fluctuated envelope radio frequency signal with less noise. SOLUTION: This radio frequency amplifier uses an offset phase locked loop to generate a radio frequency signal from a base band signal. In order that the phase locked loop can process a signal with a prescribed amplitude, the signal is given to limiters 5, 19 before being applied to a phase comparator 6. Applying envelope modulation (16) to an output of an RF amplifier stage 11 can restore an envelope. | ||||||
| 230 | It is multiplex broadcasting equipment | JP2981097 | 1997-01-30 | JP3088322B2 | 2000-09-18 | 俊幸 竹ヶ原 |
| 231 | Balanced modulator - transmission device | JP52344294 | 1994-04-14 | JPH08509333A | 1996-10-01 | ティモシー ピー ハーリック |
| (57)【要約】 本発明は、抑制キャリア出力を発生しない少なくとも１つの個々の振幅変調器（230）を有する平衡型変調器を提供する。 その一例は、単一の振幅変調器（230）を使用し、そのキャリア入力は、極性検出器（220）の出力に基づいて遅延素子（260）により半波長だけ選択的に遅延され、そしてその振幅入力は、変調入力信号の絶対値を受け取る。 上記変調器を含み、直角振幅変調又は単一側波帯変調が行われる。 | ||||||
| 232 | Modulator | JP183589 | 1989-01-06 | JP2513289B2 | 1996-07-03 | NAGATA YOSHIAKI |
| 233 | Wide band iq modulator provided with automatic rc/cr quadrature phase network | JP20764894 | 1994-08-31 | JPH07183929A | 1995-07-21 | MAAKASU KEI DATSUSHIRUBUA; ANDORIYUU EMU TEIITSUERU |
| PURPOSE: To generate the quadrature phase of equal amplitude over wide range frequencies by providing a quadrature phase network for responding to a control signal depending on frequency. CONSTITUTION: An RF signal 24 is impressed to CR/RC phase shift networks (NW) 48 and 49. The NW 48 and 49 respectively output quadrature phase shift signals ϕi67 and ϕq66 through CR/RC phase shifters 61 and 60 in response to analog control signals Vci50 and Vcq51. The signals ϕi and ϕq are inputted to a linear amplifier 52 and level signals Di55 and Dq59 are outputted by level detectors 55 and 58. The signals Di55 and Dq59 control the NW 48 and 49 so as to turn the difference of Di55 and Dq59 to zero through a servo system for driving the signals Vci50 and Vcq51. This control can be performed by impressing the signals Vci and Vcq to the gate of MESFET consisting of variable resistors Ri65 and Rq62 at the phase shifters 61 and 60. Thus, the quadrature phase shift of equal amplitude can be provided in spite of frequency. | ||||||
| 234 | Transmission apparatus for transmitting communication traffic efficiently through a phase modulated carrier signal | JP24538689 | 1989-09-22 | JPH0693705B2 | 1994-11-16 | グレゴリー・ジョン・アーンスト; ダニエル・マックレイト・フラリー・ジュニア |
| 235 | JPH04500897A - | JP51090890 | 1990-08-01 | JPH04500897A | 1992-02-13 | |
| 236 | JPH046128B2 - | JP17872881 | 1981-11-06 | JPH046128B2 | 1992-02-04 | TAKAGI AI |
| 237 | Modulator | JP183589 | 1989-01-06 | JPH02182060A | 1990-07-16 | NAGATA YOSHIAKI |
| PURPOSE: To always improve a transmission spectrum characteristic with high accuracy by making a band of a transmission signal sufficiently narrow so as to apply initial setting and then passing through a normal signal at application of power or when a sample timing of a demodulator output is largely deviated. CONSTITUTION: A switching circuit 115 selects signals 111-I, 111-Q, then a delay till a signal returns to an input terminal 105 from an output terminal 104 is negligibly small in comparison with a time of a signal band. A signal conversion circuit 120 receiving the signals 111-I, 111-Q outputs complex signals 121-I, 121-Q, which represent addition of distortion to compensate the nonlinearity characteristic of an amplifier. The input signals 111-I, 111-Q are inputted to a subtraction circuit 160 through a variable delay circuit 161 together with outputs 151-I, 151-Q of AD converters. When an output of the subtractor circuit is not 0, a correction quantity generating circuit 170 multiplies (p) with the output of the subtractor circuit 160, an adder circuit 180 adds the output of the circuit 120 and the output of the correction quantity generating circuit, resulting signals 171-I, 171-Q are outputted to rewrite the content of the signal conversion circuit 120. COPYRIGHT: (C)1990,JPO&Japio | ||||||
| 238 | Modulator | JP6128085 | 1985-03-26 | JPS61220546A | 1986-09-30 | NAGATA YOSHIAKI |
| PURPOSE:To prevent deterioration of the transmission spectrum by distorting in advance not only the symbol point but also the waveform of a signal between the symbol points. CONSTITUTION:A shift register 120 stores the data for a share of K-pieces of signals (K is a constant <=1). A ROM 130 receives the output from a counter 110 and outputs the transmission signal waveform sampled for a duration of one symbol correspondent to a shift pattern, and in a RAM 140, it is made a complex signal waveform and outputted. The output from the RAM 140 is converted to an analog data by a D/A converter 150, modulated by a modulator 160, and outputted from a terminal 102 to a non-linear amplifier that is not shown in the figure. Also, the output from the non-linear amplifier inputted from a terminal 103 is in part demodulated by a demodulator 165, and digitized by an A/D converter 155. A subtracting circuit 170 compares said output from the converter 155 and that from the ROM 130. The output from the circuit 170 is multiplied by a constant P (constant<=1) by a correction-amount generating circuit 180, is added to the output from the RAM 140 by an adder 190. And the output from the adder 190 is written in the RAM 140. | ||||||
| 239 | Modulator | JP5713885 | 1985-03-20 | JPS61214843A | 1986-09-24 | NAGATA YOSHIAKI |
| PURPOSE:To perform compensation which does not degrade a transmission spectrum, by rewriting adaptively contents of a memory in accordance with the output of a correcting signal generating circuit. CONSTITUTION:Signals 111-I and 111-Q inputted from terminals 101 and 102 are distorted by a memory 120 for the purpose of compensating the nonlinearity of an amplifier to output complex signals 121-I and 121-Q, and these signals are converted to analog signals, and the output of an oscillator 141 is modulated in an orthogonal modulator 140 and is inputted to the amplifier from an output terminal 104. A part of the amplifier output is inputted from an input terminal 103, and demodulated complex base band signals 149-I and 149-Q are sampled and quantized by an A/D converter 150 and are subtracted from signals 111-I and 111-Q by a subtractor 160, and subtraction results are multiplied by P in a correcting quantity generating circuit 170 and are added to the output of a RAM 120 in an adding circuit 180 to output signal 171-I and 171-Q, and contents of the memory are rewritten. | ||||||
| 240 | High frequency modulation circuit | JP4041384 | 1984-03-05 | JPS60185475A | 1985-09-20 | YAMAGUCHI YOSHITADA |
| PURPOSE: To cope with a receiver of the different system and to attain economy by providing plural modulation circuits of different system switchingly in a device modulating a reproducing signal from a VTR or the like and applying the result to the receiver so as to reproduce the recorded picture. CONSTITUTION: The plural sound subcarrier modulation circuits OM and G in response to the television system of the receivers in use are provided, and they are switched corresponding to the receiver in use by using the 1st switching transistors Q 1, Q 4 and Q 7. Further, a modulation means comprising a block L mixing the modulated sound subcarrier signal and a video signal so as to modulate a carrier from a carrier oscillator COSC is provided and the modulation system of the modulation means is switched in response to the system of the receiver in use by using the 2nd switching means comprising blocks J, K. Thus, the economical constitution is attained in comparison with the case with an exclusive modulation circuit provided at each television system. COPYRIGHT: (C)1985,JPO&Japio | ||||||
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