专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US10257014B2 Method and system for controlling phase of a signal 有权
公开(公告)号：US10257014B2
公开(公告)日：2019-04-09
申请号：US15763481
申请日：2016-10-06
申请人： Ariel-University Research and Development Company Ltd.
发明人： Shmuel Sternklar , Moshe Ben-Ayun
IPC分类号： H04L27/36 , G01R25/04 , H03C3/40
摘要： A method of amplifying a phase shift, comprises: receiving an input signal in response to an output signal; generating a reference signal; varying a modulation of at least one of the signals such that a ratio between modulation amplitudes of the input and reference signals is at least 0.9 and at most 1.1, and a phase difference between the reference and the input signals is from about 0.9 pi to about 1.1 pi; forming an output signal which comprises a sum of the reference and input signals, following the variation; and filtering the output signal by a bandpass filter to form a filtered output signal, wherein a bandwidth of the bandpass filter is selected such that XG

2. 发明申请

US20190020531A1 TRANSMISSION SYSTEM AND METHOD 审中-公开
公开(公告)号：US20190020531A1
公开(公告)日：2019-01-17
申请号：US16029274
申请日：2018-07-06
申请人： FUJITSU LIMITED
发明人： Yi Ge , Takeshi Hoshida , Hisao Nakashima , YUICHI AKIYAMA
IPC分类号： H04L27/36 , H03C3/40 , H04L1/00 , H04L25/49 , H03F1/00
CPC分类号： H04L27/364 , H03C3/40 , H03C5/00 , H03F1/00 , H03F3/24 , H03F2200/336 , H04B1/0475 , H04L1/0042 , H04L1/0047 , H04L25/03828 , H04L25/49
摘要： A transmission system includes a first transponder including a first I/Q modulator, and a second transponder including a second I/Q modulator, and configured to communicate with the first transponder using a frequency modulation scheme, wherein the first transponder is configured to set a first phase rotation mode in a first state for first light signal output from the first I/Q modulator, and transmit, to the second transponder, a first command to specify a second phase rotation mode for second light signal output from the second I/Q modulator, and the second transponder is configured to set, in response to the first command, the second phase rotation mode in a state specified by the first command.

3. 发明授权

US10057103B2 All digital multi-channel RF transmitter for paralel magnetic resonance imaging with SSB modulation 有权
公开(公告)号：US10057103B2
公开(公告)日：2018-08-21
申请号：US15504096
申请日：2016-01-28
申请人： Aselsan Elektronik Sanayi ve Ticaret Anonim Sirketi
发明人： Bulent Sen , Filiz Ece Sagcan , Aylin Bayram
IPC分类号： H03M3/00 , H04L27/36 , H03C3/40 , H04L27/233 , H03D3/00
CPC分类号： H04L27/362 , G01R33/3607 , G01R33/4835 , G01R33/5612 , G01R33/5659 , H03C3/40 , H03D3/007 , H03F2200/331 , H03M3/40 , H04L27/2332
摘要： In the present invention, an all digital, multi channel RF transmitter is utilized for a parallel magnetic resonance imaging (MRI) device, MRI signal generation, modulation and amplification are employed entirely digitally in the proposed RF transmitter, which enables each transmit channel to be easily and individually reconfigured in both amplitude and phase. Individual channel control ensures a homogeneous magnetic field in the multi channel RF coil in MRI. Besides the homogeneous magnetic field generation, multi-frequency MRI signal generation is made easy by the present invention with very high frequency resolution. Multi-frequency enables faster image acquisition which reduces MRI operation time. Digital Weaver Single Side Band (SSB) modulation is also incorporated into the all digital transmitter to suppress unwanted bands of Double Side Band (DSB) MRI signals. The power amplifier in the MRI transmitter does not amplify the unwanted band so that SSB modulation leads to higher power efficiency.

4. 发明申请

US20180198573A1 SYSTEMS AND METHODS FOR ASYNCHRONOUS RE-MODULATION WITH ADAPTIVE I/Q ADJUSTMENT 审中-公开
公开(公告)号：US20180198573A1
公开(公告)日：2018-07-12
申请号：US15806065
申请日：2017-11-07
申请人： Aviat U.S., Inc.
发明人： Emerick Vann , Yen-Fang Chao , Youming Qin , Roland Matian
IPC分类号： H04L1/20 , H04L27/38 , H04L1/00 , H04B1/30 , H03C3/40 , H04B1/16 , H04B1/28 , H04B1/00 , H03D7/16 , H03D3/00 , H04B1/10
CPC分类号： H04L1/206 , H03C3/406 , H03D3/009 , H03D7/168 , H04B1/0014 , H04B1/10 , H04B1/16 , H04B1/28 , H04B1/30 , H04L1/0036 , H04L1/203 , H04L1/208 , H04L27/38 , H04L27/3854
摘要： Various embodiments provide for systems and methods for signal conversion of one modulated signal to another modulated signal using demodulation and then re-modulation. According to some embodiments, a signal receiving system may comprise an I/Q demodulator that demodulates a first modulated signal to an in-phase (“I”) signal and a quadrature (“Q”) signal, an I/Q signal adjustor that adaptively adjusts the Q signal to increase the signal-to-noise ratio (SNR) of a transitory signal that is based on a second modulated signal, and an I/Q modulator that modulates the I signal and the adjusted Q signal to the second modulated signal. To increase the SNR, the Q signal may be adjusted based on a calculated error determined for the transitory signal during demodulation by a demodulator downstream from the I/Q modulator.

5. 发明申请

US20180109411A1 ALL DIGITAL MULTI-CHANNEL RF TRANSMITTER FOR PARALEL MAGNETIC RESONANCE IMAGING WITH SSB MODULATION 审中-公开
公开(公告)号：US20180109411A1
公开(公告)日：2018-04-19
申请号：US15504096
申请日：2016-01-28
申请人： Aselsan Elektronik Sanayi ve Ticaret Anonim Sirketi
发明人： Bulent SEN , Filiz Ece SAGCAN , Aylin BAYRAM
IPC分类号： H04L27/36 , H03C3/40 , H03D3/00 , H03M3/00 , H04L27/233
CPC分类号： H04L27/362 , G01R33/3607 , G01R33/4835 , G01R33/5612 , G01R33/5659 , H03C3/40 , H03D3/007 , H03F2200/331 , H03M3/40 , H04L27/2332
摘要： In the present invention, an all digital, multi channel RF transmitter is utilized for a parallel magnetic resonance imaging (MRI) device, MRI signal generation, modulation and amplification are employed entirely digitally in the proposed RF transmitter, which enables each transmit channel to be easily and individually reconfigured in both amplitude and phase. Individual channel control ensures a homogeneous magnetic field in the multi channel RF coil in MRI Besides the homogeneous magnetic field generation, multi-frequency MRI signal generation is made easy by the present invention with very high frequency resolution. Multi-frequency enables faster image acquisition which reduces MRI operation time. Digital Weaver Single Side Band (SSB) modulation is also incorporated into the all digital transmitter to suppress unwanted bands of Double Side Band (DSB) MRI signals. The power amplifier in the MRI transmitter does not amplify the unwanted band so that SSB modulation leads to higher power efficiency.

6. 发明授权

US09525514B2 System and method for decoding block of data received over communication channel 有权
标题翻译：用于解码通过通信信道接收的数据块的系统和方法
公开(公告)号：US09525514B2
公开(公告)日：2016-12-20
申请号：US14604871
申请日：2015-01-26
申请人： Mitsubishi Electric Research Laboratories, Inc.
发明人： Kyeong Jin Kim , Philip Orlik , Toshiaki Koike-Akino
IPC分类号： H04L27/08 , H01Q11/12 , H04L1/00 , H04B7/04 , H03C3/40 , H04L25/02 , H04L25/03
CPC分类号： H04L1/0054 , H03C3/40 , H04B7/0413 , H04L25/0246 , H04L25/03216 , H04L25/03286 , H04L25/03891
摘要： A method decodes a block of data received over a communication channel. The method determines an initial estimate of bits in the block using a QR decomposition (QRD-M) method decoding the bits in the block sequentially by reducing an accumulated distance between the initial estimate and the bits of the block. Then, the method determines the block using a likelihood ascent (LAS) method that iteratively updates the bits of the block starting from the initial estimate.
摘要翻译：一种方法对通过通信信道接收的数据块进行解码。该方法使用QR分解（QRD-M）方法来确定块中比特的初始估计，其通过减少初始估计与块的比特之间的累积距离来顺序地解码块中的比特。然后，该方法使用从初始估计开始迭代地更新块的比特的似然上升（LAS）方法来确定块。

7. 发明申请

US20050225400A1 Voltage-controlled oscillator and quadrature modulator 有权
标题翻译：压控振荡器和正交调制器
公开(公告)号：US20050225400A1
公开(公告)日：2005-10-13
申请号：US10521099
申请日：2003-08-19
申请人： Akihiko Yoneya
发明人： Akihiko Yoneya
IPC分类号： H03K3/354 , H03C3/40 , H03K3/03 , H03K3/282 , H03L7/099 , H04L27/36 , H03B1/00
CPC分类号： H03K3/0315 , H03C3/40 , H03L7/0995
摘要： A ring oscillator of an even number of stages of inverting/summing amplifiers that adds, to an input of each of the amplifiers, a signal from one such of the amplifiers as to be distant by an even number of stages therefrom, to realize a desired oscillation operation, thereby directly generating signals having phases shifted by 90 degrees from each other. Further, the signals in the ring oscillator are complementary to each other, so that by arranging these signals close to each other in a wiring, it is possible to realize low sensitivity to a mixed external signal.
摘要翻译：一个反相/相加放大器的偶数阶段的环形振荡器，其中每个放大器的输入端将来自一个这样的放大器的信号从一个这样的放大器延伸到远离它们的偶数级，以实现期望的从而直接产生具有彼此偏移90度的相位的信号。此外，环形振荡器中的信号彼此互补，使得通过在布线中布置这些信号彼此靠近，可以实现对混合外部信号的低灵敏度。

8. 发明授权

US06940916B1 Wideband analog quadrature modulator/demodulator with pre-compensation/post-compensation correction 有权
标题翻译：具有预补偿/后补偿校正的宽带模拟正交调制器/解调器
公开(公告)号：US06940916B1
公开(公告)日：2005-09-06
申请号：US09771144
申请日：2001-01-26
申请人： William Dean Warner , Soon Sun Shin , Andrew S. Wright
发明人： William Dean Warner , Soon Sun Shin , Andrew S. Wright
IPC分类号： H03C3/40 , H03D3/00 , H04L5/12 , H04L23/02 , H04L27/00
CPC分类号： H03D3/009 , H03C3/40 , H03D3/008 , H04L27/0014 , H04L2027/0016 , H04L2027/0018 , H04L2027/0024
摘要： The present invention is related to methods and apparatus that compensate for quadrature impairments of an analog quadrature modulator and/or demodulator over a relatively wide signal bandwidth. One embodiment pre-distorts baseband signals in a quadrature modulator compensation signal processor (QMCSP) to negate the quadrature impairment of an analog quadrature modulator and corrects a received baseband signal in a quadrature demodulator compensation signal processor (QDCSP) to cancel the quadrature impairment of an analog quadrature demodulator. The QMCSP and the QDCSP contain adaptive digital filter correction structures that pre-compensate and post-compensate, respectively, for the quadrature impairments introduced by the analog quadrature modulator and the analog quadrature demodulator over a relatively wide bandwidth. A phase shifter advantageously shifts the phase of a local oscillator signal to the analog quadrature demodulator to distinguish quadrature impairments introduced by the modulation path from quadrature impairments introduced by the demodulation path.
摘要翻译：本发明涉及在相对宽的信号带宽上补偿模拟正交调制器和/或解调器的正交损伤的方法和装置。一个实施例在正交调制器补偿信号处理器（QMCSP）中对基带信号进行预失真以消除模拟正交调制器的正交损伤，并校正正交解调器补偿信号处理器（QDCSP）中的接收基带信号以消除正交调制器补偿信号处理器模拟正交解调器。 QMCSP和QDCSP包含自适应数字滤波器校正结构，分别对模拟正交调制器和模拟正交解调器在相对宽的带宽上引入的正交损耗进行预补偿和后补偿。移相器有利地将本地振荡器信号的相位移动到模拟正交解调器，以将由调制路径引入的正交损耗与由解调路径引入的正交损耗区分开。

9. 发明申请

US20050123025A1 Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations 有权
标题翻译：使用通用频率转换技术的无线局域网（WLAN），包括多相实施例和电路实现
公开(公告)号：US20050123025A1
公开(公告)日：2005-06-09
申请号：US11041422
申请日：2005-01-25
申请人： David Sorrells , Michael Bultman , Robert Cook , Richard Looke , Charley Moses , Gregory Rawlins , Michael Rawlins
发明人： David Sorrells , Michael Bultman , Robert Cook , Richard Looke , Charley Moses , Gregory Rawlins , Michael Rawlins
IPC分类号： H03C3/40 , H03D3/00 , H03D7/00 , H04L12/28 , H04L12/56 , H04B1/69
CPC分类号： H03D3/006 , H03C3/40 , H03D7/00 , H04W84/12 , H04W88/02
摘要： Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal generator, a demodulation/modulation facilitation module, and a MAC interface. The WLAN receiver includes at least one universal frequency translation module that frequency down-converts a received EM signal. In embodiments, the UFT based receiver is configured in a multi-phase embodiment to reduce or eliminate re-radiation that is caused by DC offset. The WLAN transmitter includes at least one universal frequency translation module that frequency up-converts a baseband signal in preparation for transmission over the wireless LAN. In embodiments, the UFT based transmitter is configured in a differential and multi-phase embodiment to reduce carrier insertion and spectral growth.
摘要翻译：本文描述了频率转换及其应用，包括RF调制解调器和无线局域网（WLAN）应用。在实施例中，WLAN发明包括天线，LNA / PA模块，接收机，发射机，控制信号发生器，解调/调制促进模块和MAC接口。 WLAN接收机包括至少一个对所接收的EM信号进行下变频的通用频率转换模块。在实施例中，基于UFT的接收机被配置在多相实施例中以减少或消除由DC偏移引起的再辐射。 WLAN发射机包括至少一个通用频率转换模块，其对基带信号进行频率上变频，以准备通过无线LAN进行传输。在实施例中，基于UFT的发射机被配置在差分和多相实施例中以减少载波插入和频谱增长。

10. 发明申请

US20050099222A1 Electronically programmable multimode circuit 有权
公开(公告)号：US20050099222A1
公开(公告)日：2005-05-12
申请号：US10705252
申请日：2003-11-10
申请人： Jeffrey Yang , Matt Nishimoto , Xing Lan , Michael Battung , Robert Wang , Yun-Ho Chung
发明人： Jeffrey Yang , Matt Nishimoto , Xing Lan , Michael Battung , Robert Wang , Yun-Ho Chung
IPC分类号： H03C3/40 , H03F1/02 , H03F3/21 , H03F3/72 , H03K17/62
CPC分类号： H03F3/72 , H03C3/40 , H03F1/0277 , H03F3/211 , H03F2200/372
摘要： An electronically programmable multimode circuit is described. More particularly, the present invention is an electronically programmable multimode circuit that includes a first path and a second path wherein a mode and a signal directional flow direction is controlled through the selective biasing of the first path and the second path. A multimode circuit is produced that contains modes such as a phase shifter mode, an IQ modulation mode, an amplifier mode, a mixer mode, and a multiplier mode.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式