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. 发明申请

WO2015162009A1 PHASE NOISE TRACKING AND REDUCTION 审中-公开
标题翻译：相位噪声跟踪和减少
公开(公告)号：WO2015162009A1
公开(公告)日：2015-10-29
申请号：PCT/EP2015/057657
申请日：2015-04-09
申请人： NOKIA SOLUTIONS AND NETWORKS OY
发明人： THOMAS, Timothy , CUDAK, Mark
IPC分类号： H04L27/00 , H04L25/03
CPC分类号： H04L25/03305 , H04B17/0082 , H04B17/345 , H04L25/03006 , H04L25/03178 , H04L27/0014 , H04L27/22 , H04L2027/0016 , H04L2027/003 , H04L2027/0038 , H04L2027/0046 , H04L2027/0055 , H04L2027/0067 , H04L2027/0085 , H04W84/042
摘要： A group of data symbols for a current block of data symbols in multiple blocks received over a communication channel is equalized, based on a pilot block, to generate a group of equalized symbols. The group of equalized symbols is de-rotated as a function of a current phase estimate to determine initial de-rotated equalized symbols. The phase estimate is an estimate of phase caused by noise for blocks previous to the current block. Additionally, a phase metric is calculated from real and imaginary parts of the initial de-rotated equalized symbols, wherein the phase metric estimates phase caused by noise for the current block. The current phase estimate is updated with the phase metric. The initial de-rotated equalized symbols are de-rotated by the phase metric to determine final equalized and de-rotated symbol estimates. The final equalized and de-rotated symbol estimates are output. Apparatus, methods, and computer program products are disclosed.
摘要翻译：基于导频块，在通过通信信道接收的多个块中的当前数据符号块的一组数据符号被均衡，以生成一组均衡的符号。作为当前相位估计的函数，均衡符号组被去旋转以确定初始去旋转均衡符号。相位估计是对当前块之前的块的噪声引起的相位的估计。另外，根据初始去旋转均衡符号的实部和虚部计算相位度量，其中相位度量估计由当前块的噪声引起的相位。当前相位估计用相位量度更新。初始去旋转的均衡符号通过相位度量被去旋转以确定最终的均衡和去旋转符号估计。输出最终均衡和去旋转的符号估计。公开了装置，方法和计算机程序产品。

2. 发明申请

WO2014181075A1 CORRECTION OF QUADRATURE PHASE AND GAIN MISMATCH IN RECEIVER DOWN-CONVERSION USING A DUAL CORDIC ARCHITECTURE 审中-公开
标题翻译：使用双轨架构修正接收器下变频器中的相位和增益误差
公开(公告)号：WO2014181075A1
公开(公告)日：2014-11-13
申请号：PCT/GB2014/050153
申请日：2014-01-21
申请人： NORDIC SEMICONDUCTOR ASA , SAMUELS, Adrian, James
发明人： WICHLUND, Sverre , WEBERG, Stein, Erik , SUNDSBØ, Ingil
IPC分类号： H04L27/00 , H04L27/38
CPC分类号： H04B1/12 , H04L27/0014 , H04L27/364 , H04L27/3827 , H04L2027/003
摘要： A digital radio receiver is disclosed comprising: • a first section arranged to receive an analogue radio signal and to generate therefrom digital intermediate frequency I and Q channel samples, • a second section arranged to convert said I and Q channel samples to a lower, baseband frequency, said second section comprising: • a first coordinate rotation digital computer, CORDIC, module arranged to perform a complex rotation of the I channel samples; • a second coordinate rotation digital computer, CORDIC, module arranged to perform a complex rotation of the Q channel samples; • a phase accumulator arranged to provide an output signal representing a complex rotation to be applied to each of the I and Q channel samples, • wherein the second section is arranged such that the phase accumulator output signal is modified by a phase offset signal prior to being supplied to one of the first and second coordinate rotation digital computers, CORDICs.
摘要翻译：公开了一种数字无线电接收机，包括：•第一部分，被布置成接收模拟无线电信号并从其产生数字中频I和Q信道采样;第二部分，被布置成将所述I和Q信道样本转换成较低的基带所述第二部分包括：•第一坐标旋转数字计算机CORDIC，被布置成执行I通道样本的复旋转; •第二坐标旋转数字计算机，CORDIC模块，被布置成执行Q通道样本的复数旋转; •相位累加器，被布置成提供表示要施加到I和Q通道样本中的每一个的复数旋转的输出信号，其中第二部分被布置为使得相位累加器输出信号由相位偏移信号修改被提供给第一和第二坐标旋转数字计算机之一CORDIC。

3. 发明申请

WO2014100701A1 DATA-MODULATED PILOTS FOR PHASE AND GAIN DETECTORS 审中-公开
标题翻译：用于相位和增益检测器的数据调制型PILOTS
公开(公告)号：WO2014100701A1
公开(公告)日：2014-06-26
申请号：PCT/US2013/077164
申请日：2013-12-20
申请人： QUALCOMM INCORPORATED
发明人： GOTMAN, Maxim , GREENBERGER, Ronen , ALINA, Ziv
IPC分类号： H04L1/00 , H04L5/00 , H04L27/00
CPC分类号： H04J9/00 , H04B14/002 , H04L1/0003 , H04L1/0016 , H04L1/005 , H04L1/0086 , H04L5/005 , H04L5/006 , H04L25/067 , H04L27/0008 , H04L27/22 , H04L27/38 , H04L2027/003 , H04L2027/0055 , H04L2027/0067 , H04L2027/0085 , H04W72/082 , Y02D50/10
摘要： Methods, systems, and devices are described for mitigating an unwanted increase in a coding rate of a wireless communication signal. A plurality of symbols including a transmitted codeword is received. The plurality of symbols including a first group of data symbols with a first modulation and coding scheme and a second group of data modulated pilot symbols with a second modulation and coding scheme. Applicable demodulation schemes are adaptively switched for each group of the plurality of symbols. The second group of data modulated pilot symbols are used in lieu of pilot symbols. The second modulation and coding scheme is a more reliable modulation and coding scheme than the first modulation and coding scheme.
摘要翻译：描述了用于减轻无线通信信号的编码率的不期望的增加的方法，系统和设备。接收包括发送码字的多个符号。所述多个符号包括具有第一调制和编码方案的第一组数据符号和具有第二调制和编码方案的第二组数据调制导频符号。针对多个符号中的每个组自适应地切换适用的解调方案。使用第二组数据调制导频符号来代替导频符号。第二调制和编码方案是比第一调制和编码方案更可靠的调制和编码方案。

4. 发明申请

WO2014055569A1 RF CARRIER SYNCHRONIZATION AND PHASE ALIGNMENT METHODS AND SYSTEMS 审中-公开
标题翻译： RF载波同步和相位对准方法和系统
公开(公告)号：WO2014055569A1
公开(公告)日：2014-04-10
申请号：PCT/US2013/062935
申请日：2013-10-01
申请人： PARK, Joshua
发明人： PARK, Joshua
IPC分类号： H04L7/00 , H04L25/38
CPC分类号： H04W56/006 , G01S3/18 , H04B7/0413 , H04L7/0016 , H04L25/02 , H04L27/0014 , H04L27/364 , H04L2027/003 , H04L2027/0046 , H04L2027/0053 , H04L2027/0067 , H04W56/0035 , H04W64/006
摘要： A method comprising generating a baseband information signal by mixing a received modulated carrier signal with a local oscillator (LO) signal having an LO frequency; obtaining baseband signal samples of the baseband information signal having a baseband signal magnitude and a baseband signal phase; determining a cumulative phase measurement associated with baseband signal samples having a baseband signal magnitude greater than a threshold; and, applying a correction signal to compensate for an LO frequency offset of the LO frequency based on the cumulative phase.
摘要翻译：一种方法，包括通过将接收到的调制载波信号与具有LO频率的本地振荡器（LO）信号混合来产生基带信息信号; 获取具有基带信号幅度和基带信号相位的基带信号信号的基带信号样本; 确定与具有大于阈值的基带信号幅度的基带信号样本相关联的累积相位测量; 并且基于累积相位施加校正信号以补偿LO频率的LO频率偏移。

5. 发明申请

WO2013148471A1 RECEIVER-SIDE ESTIMATION OF AND COMPENSATION FOR SIGNAL IMPAIRMENTS 审中-公开
标题翻译：接收端信号损失估计及补偿
公开(公告)号：WO2013148471A1
公开(公告)日：2013-10-03
申请号：PCT/US2013/033360
申请日：2013-03-21
申请人： QUALCOMM INCORPORATED
发明人： VARANESE, Nicola , PIETSCH, Christian , MONTOJO, Juan
IPC分类号： H04L27/38 , H04L25/02 , H04L27/26 , H04L27/00
CPC分类号： H04L25/022 , H04L1/0001 , H04L25/0232 , H04L27/2613 , H04L27/2647 , H04L27/3854 , H04L27/3863 , H04L27/3872 , H04L2027/003 , H04L2027/0073 , H04L2027/0089 , H04L2027/0093 , H04L2027/0095
摘要： A receiver receives a repeating or periodic signal and, based on the signal, estimates a carrier frequency offset for the receiver. Based on the signal and the estimated carrier offset, an I/Q mismatch for the receiver is estimated and compensation for the estimated I/Q mismatch is performed. After compensating for the estimated receiver I/Q mismatch, the carrier frequency offset is re-estimated.
摘要翻译：接收机接收重复或周期性信号，并且基于该信号估计接收机的载波频率偏移。基于信号和估计的载波偏移，估计接收机的I / Q不匹配，并执行估计的I / Q失配的补偿。在补偿估计的接收机I / Q不匹配之后，重新估计载波频率偏移。

6. 发明申请

WO2013100891A1 FRACTIONAL SYMBOL BASED PHASE NOISE MITIGATION 审中-公开
标题翻译：基于相关符号的相位噪声缓解
公开(公告)号：WO2013100891A1
公开(公告)日：2013-07-04
申请号：PCT/US2011/067335
申请日：2011-12-27
申请人： INTEL CORPORATION , RUBIN, Amir , GUREVITZ, Assaf , PARYANTI, Gil
发明人： RUBIN, Amir , GUREVITZ, Assaf , PARYANTI, Gil
IPC分类号： H04L27/26 , H04L27/01
CPC分类号： H04B1/12 , H04L25/03159 , H04L25/03993 , H04L27/2647 , H04L27/2657 , H04L27/2671 , H04L2027/003 , H04L2027/0034 , H04L2027/0038 , H04L2027/0046 , H04L2027/0067 , H04L2027/0085
摘要： Fractional symbol based phase noise mitigation, including methods and systems to determine phase noise trajectory, or indication of phase noise, for each of multiple fractional portions of a frequency domain symbol, and modify the symbol based on the phase noise trajectories of the subsets. Multiple correction hypotheses may be generated for each fractional portion of the symbol based on pre-defined phase noise hypotheses. The correction hypotheses may include frequency domain correction hypotheses. The correction hypotheses for a subset may be evaluated to select one of the phase noise hypotheses as the trajectory for the subset. The evaluation may include applying each correction hypothesis to a corresponding equalized frequency domain symbol to generate corresponding symbol hypotheses, computing a signal quality for each symbol hypothesis, and comparing the signal qualities. Signal qualities may be determined as error vector magnitudes, and may be based on all or a subset of corresponding symbol tones.
摘要翻译：基于分数符号的相位噪声减轻，包括确定相位噪声轨迹的方法和系统，或对于频域符号的多个小数部分中的每一个的相位噪声的指示，以及基于子集的相位噪声轨迹修改符号。可以基于预定义的相位噪声假设为符号的每个小数部分生成多个校正假设。修正假设可能包括频域校正假设。可以评估子集的校正假设以选择相位噪声假设之一作为子集的轨迹。评估可以包括将每个校正假设应用于对应的均衡频域符号以产生相应的符号假设，计算每个符号假设的信号质量，以及比较信号质量。信号质量可以被确定为误差矢量幅度，并且可以基于相应符号音调的全部或一个子集。

7. 发明申请

WO2012088288A1 AUTOMATIC FREQUENCY OFFSET COMPENSATION IN ZERO-INTERMEDIATE FREQUENCY RECEIVERS USING MINIMUM-SHIFT KEYING (MSK) SIGNALING 审中-公开
标题翻译：使用最小移位键控（MSK）信号的零中频接收机中的自动频率偏移补偿
公开(公告)号：WO2012088288A1
公开(公告)日：2012-06-28
申请号：PCT/US2011/066523
申请日：2011-12-21
申请人： MICROCHIP TECHNOLOGY INCORPORATED , NÉMETH, József, G. , KOVÁCS, Péter, Szilveszter
发明人： NÉMETH, József, G. , KOVÁCS, Péter, Szilveszter
IPC分类号： H04L27/00 , H04L27/227
CPC分类号： H04L27/0014 , H04L27/2278 , H04L2027/0016 , H04L2027/003 , H04L2027/0095
摘要： Carrier frequency offset (CFO) between a transmitter and receiver signaling at 2 Mbps data rate with a 11110000 pattern as the preamble period is corrected within one preamble time period using free-running coarse and fine carrier frequency offset estimations. Two estimates for the CFO are computed, coarse and fine. The fine one is computationally accurate but may not be correct because of a potential wrap at ±180° in the computation. The coarse one is not accurate but delivers the approximate CFO value without wrap over. The comparison between the coarse and fine estimates thus may be used to detect a wrap over in the fine estimate and modify the fine estimate accordingly. Thereafter the compensated fine CFO estimation is used for carrier frequency offset (CFO) compensation.
摘要翻译：使用自由运行的粗略和精细载波频率偏移估计，在一个前同步码时间段内校正具有2Mbps数据速率的发射机和接收机信令之间的载波频率偏移（CFO），其中11110000模式作为前导码周期。计算CFO的两个估计，粗略和罚款。精细的是计算准确的，但可能不正确，因为计算中的±180°的潜在缠绕。粗略的是不准确的，但是传递近似的CFO值而不会被覆盖。因此，粗略和精细估计之间的比较可以用于检测精细估计中的换算并相应地修改精细估计。此后，补偿的精细CFO估计用于载波频率偏移（CFO）补偿。

8. 发明申请

WO2011099589A1 位相偏差・搬送波周波数偏差補償装置および位相偏差・搬送波周波数偏差補償方法审中-公开
标题翻译：相位漂移/载波波频率补偿装置和相位超前/载波波频率补偿方法
公开(公告)号：WO2011099589A1
公开(公告)日：2011-08-18
申请号：PCT/JP2011/052960
申请日：2011-02-04
申请人：日本電気株式会社 , 小笠原大作
发明人：小笠原　大作
IPC分类号： H04B10/02 , H04B10/18 , H04L27/227
CPC分类号： H04L27/223 , H04B10/611 , H04B10/6165 , H04L27/0014 , H04L2027/003 , H04L2027/0067
摘要：位相偏差・搬送波周波数偏差補償装置においては、並列処理を用いて補償処理を高速化すると、伝送特性が劣化するため、本発明の位相偏差・搬送波周波数偏差補償装置は、信号分割部と、前処理用補償回路と、複数の後処理用補償回路と、信号結合部と、補正量算出部と、信号補正部とを有し、前処理用補償回路及び後処理用補償回路は、入力された信号に対する位相補償量を算出し、位相補償量によって入力された信号を補償した補償回路出力信号と位相補償量を出力し、信号結合部は、後処理用補償回路から取得した補償回路出力信号を信号分割部に入力された順番に再配列した再配列信号を出力し、補正量算出部は、前処理用補償回路及び後処理用補償回路から取得した位相補償量に基づき補正量を算出し、信号補正部は、補正量を用いて再配列信号の位相を補正する。
摘要翻译：在相位偏移/载波频率偏移补偿装置中，使用并行处理增加补偿处理速度降低了传输特性。因此，提供了一种相位偏移/载波频率偏移补偿装置，包括信号分割单元，预处理补偿电路，多个后处理补偿电路，信号组合单元，校正量计算单元和信号校正单元其中，所述预处理补偿电路和所述后处理补偿电路相对于所述输入信号计算相位补偿量，并输出所述相位补偿量，以及补偿电路输出信号，其中，所述输入信号被所述相位补偿量补偿，信号组合单元通过按照输入到信号分割单元的顺序重新排列从后处理补偿电路获取的补偿电路输出信号来输出重新排列的信号，校正量计算单元基于从预处理补充信号校正电路和后处理补偿电路，并且信号校正单元使用校正量校正重新排列的信号的相位。

9. 发明申请

WO2011060532A1 ESTIMATING RESIDUAL CARRIER FREQUENCY OFFSET IN AN OFDM SIGNAL 审中-公开
标题翻译：在OFDM信号中估计残留载波频偏
公开(公告)号：WO2011060532A1
公开(公告)日：2011-05-26
申请号：PCT/CA2010/001801
申请日：2010-11-18
申请人： WI-LAN, INC. , LI, Lingjie , WU, Shiquan
发明人： LI, Lingjie , WU, Shiquan
IPC分类号： H04B7/208 , H04J11/00
CPC分类号： H04L27/2671 , H04L27/0014 , H04L27/266 , H04L27/2675 , H04L27/2695 , H04L2027/003 , H04L2027/0067
摘要： A residual carrier frequency offset of a signal received by a receiver, which has a local frequency oscillator that generates a carrier frequency different from a carrier frequency generated by a local frequency oscillator at a transmitter that transmitted the received signal is estimated using first and second channel impulse responses derived from first and second portions of the received signal, an estimated phase difference between the first and second channel impulse responses, and an estimate of the residual carrier frequency offset computed using the estimated phase differences. The residual carrier frequency offset is estimated after most of the carrier frequency offset has been removed from the received signal using conventional means.
摘要翻译：由发送接收信号的发射机产生与本地频率振荡器产生的载波频率不同的载波频率的接收机接收的信号的残余载波频率偏移是使用第一和第二信道从接收信号的第一和第二部分导出的脉冲响应，第一和第二信道脉冲响应之间的估计相位差以及使用估计的相位差计算出的残余载波频率偏移的估计。在使用常规方法从接收信号中去除了大部分载波频率偏移之后，估计残余载波频率偏移。

10. 发明申请

WO2010114246A3 METHOD FOR TRANSMITTING UPLINK PILOT SIGNAL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR 审中-公开
标题翻译：在无线通信系统中传输上行导频信号的方法及其装置
公开(公告)号：WO2010114246A3
公开(公告)日：2010-12-23
申请号：PCT/KR2010001780
申请日：2010-03-23
申请人： LG ELECTRONICS INC , CHOI JIN SOO , CHO HAN GYU , KWAK JIN SAM , NOH MIN SEOK , MOON SUNG HO
发明人： CHOI JIN SOO , CHO HAN GYU , KWAK JIN SAM , NOH MIN SEOK , MOON SUNG HO
IPC分类号： H04L27/26
CPC分类号： H04L27/0014 , H04L2027/003 , H04L2027/0067 , H04L2027/0087
摘要： A method for transmitting an uplink pilot signal in a wireless communication system is disclosed. The method for transmitting an uplink pilot signal in a wireless communication system includes forming a basic unit including a plurality of pilot Resource Elements (REs) and data REs and having a size of 4 subcarriers × 9 Orthogonal Frequency Division Multiple Access (OFDMA) symbols, setting the plurality of pilot REs in the basic unit, and transmitting the basic unit to a base station. Each of the REs is time-frequency resource defined by one symbol index and one subcarrier index.
摘要翻译：公开了一种用于在无线通信系统中发送上行链路导频信号的方法。用于在无线通信系统中发送上行链路导频信号的方法包括形成包括多个导频资源元素（RE）和数据RE并且具有4个子载波×9正交频分多址（OFDMA）符号的大小的基本单元，将所述多个导频RE设置在所述基本单元中，并将所述基本单元发送到基站。每个RE是由一个符号索引和一个子载波索引定义的时频资源。

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