| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 21 | Quadrature modulator with adaptive suppression of carrier leakage | EP94309180.1 | 1994-12-09 | EP0661801B1 | 1998-09-23 | Blodgett, James Russell |
| 22 | Quadrature modulator with adaptive suppression of carrier leakage | EP94309180.1 | 1994-12-09 | EP0661801A1 | 1995-07-05 | Blodgett, James Russell |
A carrier leakage suppression circuit (306) adaptively suppresses carrier leakage in a signal processing device (304) which modulates a carrier signal (346) with an in-phase baseband signal (342) and a quadrature baseband signal (344) to generate a radio frequency (RF) output signal (350). The carrier leakage suppression circuit operates by imparting (by 308) a first signature (354) to the in-phase baseband signal and a second signature to the quadrature baseband (by 310) signal prior to modulation (in 312, 316) of the carrier signal. In-phase and quadrature carrier leakage components in the RF output signal are isolated and measured (in 320,322,324,326) by respectively correlating (in 328,330) the RF output signal with the first and second signatures. An in-phase offset (368) and a quadrature offset (366) are generated as a function of the measurement of the in-phase and quadrature carrier leakage components. The in-phase baseband signal is combined (in 308) with the in-phase offset and the quadrature baseband signal is combined (in 310) with the quadrature offset to thereby suppress carrier leakage due to the in-phase baseband signal and the quadrature baseband signal. |
||||||
| 23 | Système de transmission à modulation d'amplitude à porteuse supprimée, conservant la polarité du signal transmis | EP90460045.9 | 1990-12-07 | EP0433198A1 | 1991-06-19 | Lanoiselée, Marc |
Le domaine de l'invention est celui de la transmission de signaux de tous types, analogiques et/ou numériques. Plus précisément, l'invention concerne des systèmes de transmission à modulation d'amplitude exigeant de bonnes performances vis à vis du bruit induit par le canal de transmission. Le système de transmission de l'invention comprend à l'émission, des moyens (11, 13) de modulation d'amplitude à porteuse supprimée d'un signal utile (12), et des moyens (11, 15, 16) de modulation d'amplitude en quadrature de phase avec ledit signal utile modulé d'un signal de service (14), permettant, à la réception, de lever l'ambiguité sur la polarité du signal utile démodulé. Ainsi, il permet la transmission de signaux en modulation à porteuse supprimée, donc avec un bon rapport signal sur bruit, sans perdre la polarité du signal. Les émetteurs et récepteurs selon l'invention permettent également la transmission et la réception des signaux modulés en MAPS, en MABLR ou en MAPSBLR. |
||||||
| 24 | 주파수 호핑 통신용 ＩＣ | KR1020070038971 | 2007-04-20 | KR100819589B1 | 2008-04-07 | 스기야마요시까즈; 이꾸따이사오; 가쯔베유사꾸 |
| 초광대역의 528㎒의 대역폭을 갖는 복수의 신호를 고속으로 절환 가능하고, 또한 밴드 중심 주파수 및 밴드수를 임의로 설정·절환이 가능한, 주파수 호핑 통신의 기술을 제공한다. 무선 송수신 장치(100)는, 초광대역 신호를 고속으로 절환하는 UWB 방식의 주파수 호핑 통신 기능을 포함한다. 본 장치에서는, 국부 발진 회로(1)에서의 SSB 믹서(31)의 제어와 함께, DDS(30)의 주파수의 절환에 의해, 고속으로 주파수 호핑한다. 본 장치는, DDS(30)에 NCO 데이터(150)를 설정하여 출력의 사상 직교 신호(40)를 절환하고, 위상 절환 스위치(34)의 제어에 의해 SSB 믹서(31)의 입력 단자(70)의 신호 입력을 절환한다. SSB 믹서(31)의 출력 단자로부터, 제1 및 제2 사상 직교 신호를 혼합한 합 성분 또는 차 성분 중 어느 하나를 출력한다. 국부 발진 회로, 사상 직교 신호, SSB 믹서, 위상 절환 스위치, DDS | ||||||
| 25 | dc offset removal circuit using a 1-bit signal converter for the modulator | JP2008509261 | 2005-08-19 | JP4582360B2 | 2010-11-17 | ウォーキントン ロバート |
| 26 | dc offset removal circuit using a 1-bit signal converter for the modulator | JP2008509261 | 2005-08-19 | JP2009505450A | 2009-02-05 | ウォーキントン ロバート |
| 変調器の出力信号におけるキャリア・リーク（搬送波漏れ）を補償するために用いられるＤＣオフセット除去回路は、変調器に加えられる情報信号の符号を抽出する符号抽出部と、変調器の出力信号に対して包絡線検波を行い、結果として得られる包絡線を出力する包絡線検波部と、包絡線の傾斜に対して極性検出を行うスロープ検出部と、符号抽出の結果と極性検出の結果とに基づいてキャリア・リークを補償するためのＤＣオフセット除去信号を生成する信号処理部と、を有する。 信号処理部は、好ましくは、情報信号の符号を包絡線の傾斜の極性に乗算し、乗算の結果を累算することによって、ＤＣオフセット除去信号を計算する。 | ||||||
| 27 | Rc / cr broadband iq modulator with automatic quadrature network | JP20764894 | 1994-08-31 | JP3648272B2 | 2005-05-18 | アンドリュー・エム・ティーツェル; マーカス・ケイ・ダッシルヴァ |
| 28 | Carrier leakage suppression circuit of the quadrature phase modulator and carrier leakage suppression method | JP1328895 | 1995-01-04 | JP3022231B2 | 2000-03-15 | ラッセル ブロジェット ジェイムズ |
| 29 | Circuit and method for carrier leak suppression of orthogonal phase modulator | JP1328895 | 1995-01-04 | JPH0870327A | 1996-03-12 | JIEIMUZU RATSUSERU BUROJIETSUT |
| PURPOSE: To suppress a carrier leak by mixing an I-phase base-band signal with an I-phase offset and also mixing a Q-phase base-band signal with a Q- phase offset. CONSTITUTION: A carrier leak suppressing circuit 306 includes a pseudo-noise generator 340 which has code length N. An I code signal 354 is generated by extracting a phase shifter 370 at a bit position 3 and a Q-phase code signal 352 is generated by extracting the phase shifter 370 at a bit position N-1. Signals 354 and 352 represent spectrum spread codes. Signals 352 and 354 are added to the I-phase base-band signal 342 and Q-phase base-band signal 344 so as to separate an I-phase and a Q-phase component. The signals 354 and 352 are generated by a generator 340 while having lower power levels than the signals 342 and 344 so as to evade interference with modulating operation performed by a Q-phase modulator 30. | ||||||
| 30 | Modulation system | JP11601478 | 1978-09-22 | JPS5547707A | 1980-04-04 | FUJISAKI HITOSHI |
| PURPOSE: To realize the modulator wide in the dynamic range and less in the carrier leakage and harmonics, by using the transistor pair coupling the emitter to the input section. CONSTITUTION: Carrier is differentially fed to the base of two sets of differential amplifiers QE and QF via NAM (non additive mixing) circuits QA∼QD coupling the emitters and collectors and the output from the circuits QA and QB is fed to the differential amplifier COMP. The modulation signal is inputted to the circuit QA via the emitter follower. The carroer leakage depends on the dfference of VBE of each pair transistor (e.g., Q 14 and Q 13), but it can be decreased by circuit integration. The production of harmonics can be avoided with the symmetry of circuit and sufficient dynamic range can be given with the combination of PNP transistor and NPN transistor. COPYRIGHT: (C)1980,JPO&Japio | ||||||
| 31 | JPS386663B1 - | JP464960 | 1960-02-15 | JPS386663B1 | 1963-05-22 | |
| 32 | 위상 및 진폭 검출을 이용한 자동 직교 네트워크 | KR1020130145298 | 2013-11-27 | KR1020150061322A | 2015-06-04 | 켈리에프.게리슨; 레이몬드엘.베이스; 고든에이.올슨; 제프리디.얼스 |
| 진폭및 위상검출을이용한자동직교네트워크는입력오실레이터신호에대한직교신호를생성하며, 상기직교신호는그들간에진폭이동일하며이상적직교위상을가진다. RC 회로는하나의직교경로를제공하고, CR 회로는또 다른직교경로를제공한다. RC/CR 회로로부터의출력은진폭제어신호를생성하도록검출되는진폭이다. 상기출력은또한제한된진폭이며, 리미터출력간의위상이위상제어신호를생성하도록검출된다. 진폭및 위상제어신호는, 직교신호가동일한진폭이고이상적직교위상이되도록 RC/CR 회로를자동으로조절하여 RC/CR 회로에대한각각의제어신호를생성하도록조합된다. | ||||||
| 33 | 저조파 필터뱅크가 적용된 스위치 모드 전력증폭기를 포함하는 ＣＬＡＳＳ Ｓ 송신기 | KR1020120004870 | 2012-01-16 | KR1020130084101A | 2013-07-24 | 구현철; 임종균 |
| PURPOSE: A class S transmitter including a switch mode power amplifier to which a subharmonic filter bank is applied is provided to comprise the output of a bandpass signal delta modulator (BPSDM) as a subharmonic for a sampling frequency and to pass through subharmonic bands in order to transfer the signal to a load side. CONSTITUTION: A BPSDM (100) converts an analog input signal having high peak to average power ratio (PAPR) into a quantized digital signal. A switch mode power amplifier (SMPA) (200) amplifies the digital signal modulated through the BPSDM. The SMPA includes a subharmonic filter bank for passing through subharmonic bands. A band pass filter (BPF) (300) restores the input signal to the original analog signal. | ||||||
| 34 | 주파수 호핑 통신용 ＩＣ | KR1020070038971 | 2007-04-20 | KR1020070104292A | 2007-10-25 | 스기야마요시까즈; 이꾸따이사오; 가쯔베유사꾸 |
| An IC for frequency hopping communication is provided to hop a plurality of UWB(Ultra Wide Band) signals at high speed and to select and set up a band center frequency and a band number freely and arbitrarily. An IC for frequency hopping communication comprises a DDS(Direct Digital Synthesizer)(30), a fixed frequency oscillator(32), an SSB(Single Side Band) mixer(31). The DDS(30), synchronized with a reference clock, outputs the first four-phase orthogonal signals, of which their phases respectively are different at angles of 90 degrees, at a frequency based on frequency setup parameters. The fixed frequency oscillator(32) outputs the second four-phase orthogonal signals, of which their phases respectively are different at angles of 90 degrees. The SSB mixer(31) inputs the first four-phase orthogonal signals and the second four-phase orthogonal signals respectively to an RF signal input port and a local oscillation signal input port and outputs either a sum component frequency or a difference component frequency to an output port. | ||||||
| 35 | DIGITAL MODULATOR AND DIGITAL-TO-ANALOG CONVERSION TECHNIQUES ASSOCIATED THEREWITH | US15350460 | 2016-11-14 | US20170250652A1 | 2017-08-31 | Elmar Wagner |
| Some embodiments disclosed herein relate to a transmitter. The transmitter includes a digital modulator adapted to provide a digital modulated RF signal based on a multi-bit representation of data and a multi-bit representation of a carrier wave. A digital-to-analog converter (DAC) is adapted to generate an analog modulated RF signal based on the digital modulated RF signal. A resonant circuit coupled to an output of the DAC and adapted to filter undesired frequency components from the analog modulated RF signal. | ||||||
| 36 | SINGLE-SIDEBAND TRANSMITTER USING CLASS-S AMPLIFIER | US14380936 | 2013-03-15 | US20160056848A1 | 2016-02-25 | Peter Kiss; Said E. Abdelli; Donald R. Laturell; James F. MacDonald; Steven C. Pinault; Ross S. Wilson |
| An SSB transmitter includes a digital-to-digital converter generating first and second real signal components as a function of a complex input signal supplied to the transmitter, and a digital Hilbert transformation module coupled with the digital-to-digital converter and operative to generate first and second transformed signals as a function of the first and second real signal components. The transmitter further includes first and second bit-stream generators operative to generate first and second analog signals as a function of the first and second transformed signals, respectively. The transmitter includes first and second amplifiers. The first amplifier is operative to generate a first amplified signal as a function of the first analog signal. The second amplifier is operative to generate a second amplified signal as a function of the second analog signal. An analog hybrid coupler is connected with the first and second amplifiers and operative to perform an analog Hilbert transformation. | ||||||
| 37 | Suppressed carrier harmonic amplitude modulator | US13802665 | 2013-03-13 | US08907738B1 | 2014-12-09 | Dennis R Seguine |
| A circuit includes a switched modulator stage combining an information signal with a square wave carrier to produce a first modulated signal; and a second modulation stage forming additional steps in the first modulated signal to produce a second modulated signal. | ||||||
| 38 | Digital Modulator and Digital-to-Analog Conversion Techniques Associated Therewith | US12699560 | 2010-02-03 | US20110188604A1 | 2011-08-04 | Elmar Wagner |
| Some embodiments disclosed herein relate to a transmitter. The transmitter includes a digital modulator adapted to provide a digital modulated RF signal based on a multi-bit representation of data and a multi-bit representation of a carrier wave. A digital-to-analog converter (DAC) is adapted to generate an analog modulated RF signal based on the digital modulated RF signal. A resonant circuit coupled to an output of the DAC and adapted to filter undesired frequency components from the analog modulated RF signal. | ||||||
| 39 | RF transceiver using hopping frequency synthesizer | US11737802 | 2007-04-20 | US07805123B2 | 2010-09-28 | Yoshikazu Sugiyama; Isao Ikuta; Yusaku Katsube |
| A technique of frequency hopping communication capable of high-speed switching of a plurality of signals having ultra-wide band 528 MHz bandwidth at high-speed and setting and switching a band center frequency and the number of bands arbitrary is provided. A radio transceiver has a frequency hopping communication function of UWB system for switching the ultra wide band signal. In the device, high-speed frequency hopping is realized by controlling an SSB mixer in a local oscillator circuit and switching the frequency of a DDS. The device sets NCO data to the DDS and switches a quadrature phase signal of an output, and switches a signal input of an input terminal of the SSB mixer by a control of a phase switching switch. One of a sum component and a difference component of a mixture of first and second quadrature phase signals is outputted from the output terminal of the SSB mixer. | ||||||
| 40 | Method and apparatus for RF carrier suppression in a multi-modulator transmitter | US10349638 | 2003-01-23 | US20040146118A1 | 2004-07-29 | Sumit A. Talwalkar; John R. Melton; Mahibur Rahman; Vance Peterson |
| A method for suppressing a carrier in a quadrature modulator includes applying a first set of four correction signal pairs to a quadrature modulator and detecting a first set of four output signals, identifying a first optimum correction signal pair among the first set of four correction signal pairs, and applying the first optimum correction signal pair to the quadrature modulator for suppressing a carrier. An apparatus for suppressing a carrier in a quadrature modulator includes an amplifier, a radio frequency detector coupled to the amplifier, an analog-to-digital converter coupled to the radio frequency detector, a correction circuit coupled to the analog-to-digital converter; the correction circuit performing a search algorithm during a training period and determining a pair of channel correction values for suppressing a carrier; and a pair of summers coupled to the correction circuit. | ||||||
QQ群二维码
意见反馈
意见反馈