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

EP2713572B1 METHOD, DEVICE, AND SYSTEM FOR FREQUENCY OFFSET ESTIMATION AND CHANNEL ESTIMATION 有权
公开(公告)号：EP2713572B1
公开(公告)日：2018-07-11
申请号：EP12734432.3
申请日：2012-02-29
申请人： Huawei Technologies Co., Ltd.
发明人： CAI, Meng
IPC分类号： H04L27/26 , H04L25/02
CPC分类号： H04B1/1027 , H04B7/0413 , H04B2001/1072 , H04L25/0204 , H04L25/0212 , H04L25/0228 , H04L27/0014 , H04L2027/0046 , H04L2027/0065 , H04L2027/0089
摘要： Embodiments of the present invention provide a method, an apparatus, and a system for frequency offset estimation and channel estimation, relate to the field of wireless communication technologies, and can increase the accuracy of frequency offset estimation and channel estimation in a distributed microwave MIMO system. The method for frequency offset estimation and channel estimation includes: when interference signals in received data are not obtained, performing frequency offset estimation on the received data, and obtaining a frequency offset estimation result; after the interference signals in the received data are obtained, performing frequency offset estimation on the received data according to the interference signals, and obtaining a frequency offset estimation result; performing channel estimation on the received data according to the frequency offset estimation result, and obtaining a channel estimation result; obtaining the interference signals according to the frequency offset estimation result and the channel estimation result, where the interference signals are used as parameters of the frequency offset estimation.

2. 发明授权

EP2843896B1 CARRIER WAVE REPRODUCTION DEVICE AND CARRIER WAVE REPRODUCTION METHOD 有权
标题翻译：载波再现装置和载波再现方法
公开(公告)号：EP2843896B1
公开(公告)日：2018-04-04
申请号：EP13780986.9
申请日：2013-04-23
申请人： NEC Corporation
发明人： KAMIYA, Norifumi , SASAKI, Eisaku
IPC分类号： H04L27/38 , H04L1/00 , H04L27/00 , H04L27/22
CPC分类号： H04L1/0036 , H04L1/0045 , H04L27/0014 , H04L27/22 , H04L27/3818 , H04L27/3836 , H04L2027/0024 , H04L2027/0046 , H04L2027/0061 , H04L2027/0067 , H04L2027/0087
摘要： The present invention provides a carrier wave reproduction device in which bit-error characteristics are improved without decreasing transmission capacity. The carrier wave reproduction device is equipped with an interpolation filter that estimates a phase error for a received symbol on the basis of a pilot symbol included in the received symbol, a first phase rotation machine that rotates a phase of the received symbol in response to the phase error estimated by the interpolation filter and then outputs the rotated symbol as a first output symbol, a phase error compensating unit that compensates for the phase error remaining in the first output symbol and then outputs the result of the compensation as a second output symbol, a QAM symbol demapping unit that calculates both a first bit string corresponding to the first output symbol and a second bit string corresponding to the second output signal, and an error correction decoder which performs error correction on the bit error in the first bit string and outputs the result. The phase error compensating unit refers to the first bit string after error correction has been performed thereon and then compensates for the phase error remaining in the first output symbol.

3. 发明公开

EP3084973A1 USING MULTIPLE CORRELATORS TO DETERMINE SIGNAL SENT AND FREQUENCY OFFSET 审中-公开
标题翻译： VERWENDUNG MEHRERER KORRELATOREN ZUR BESTIMMUNG EINES GESENDETEN SIGNALS UND FREULENZVERSATZES
公开(公告)号：EP3084973A1
公开(公告)日：2016-10-26
申请号：EP14812793.9
申请日：2014-12-10
申请人： Nordic Semiconductor ASA
发明人： ENGELIEN-LOPES, David Alexandre , WICHLUND, Sverre , CORBISHLEY, Phil
IPC分类号： H04B1/708 , H04B1/7087 , H04L7/04
CPC分类号： H04B1/7087 , H04B17/336 , H04B2201/69 , H04L5/006 , H04L27/0014 , H04L27/227 , H04L2027/0026 , H04L2027/0034 , H04L2027/0046 , H04W4/80
摘要： A digital radio receiver is adapted to receive radio signals modulated using continuous phase modulation. The receiver includes components for receiving analogue radio signals having various carrier frequencies and a plurality of correlators corresponding to different bit sequences. Each of the plurality of correlators share a common estimator for estimating a frequency offset between the radio signals carrier frequencies and nominal carrier frequencies. The receiver further includes components allowing the estimator to determine which of the correlators produce the most optimal output signal.
摘要翻译：数字无线电接收机54适于接收使用连续相位调制调制的无线电信号。接收机包括用于接收具有载波频率的模拟无线电信号的装置，多个相关器6,8分别对应于不同的比特序列，共享用于估计所述载波频率和标称载波频率之间的频率偏差的公共估计器4，以及用于确定所述相关器6,8中的哪一个产生期望的输出信号的装置12。

4. 发明公开

EP3016339A1 CYCLE SLIP DETECTION METHOD AND DEVICE, AND RECEIVER 有权
标题翻译： TAKTAUSFALLDETEKTIONSVERFAHREN UND -ORRICHTUNG SOWIEEMPFÄNGER
公开(公告)号：EP3016339A1
公开(公告)日：2016-05-04
申请号：EP13889762.4
申请日：2013-07-15
申请人： Huawei Technologies Co., Ltd.
发明人： LIU, Ling , LI, Liangchuan
IPC分类号： H04L27/227
CPC分类号： H04L27/0014 , H04B10/6165 , H04L27/3827 , H04L2027/0046 , H04L2027/0067 , H04L2027/0095
摘要： The present invention provides a cycle-slip detection method and apparatus, and a receiver. If an absolute value of a first difference obtained by subtracting a phase of the first symbol in the k th training sequence cycle from a phase of the last symbol in the (k-1) th training sequence cycle in a received signal is greater than a cycle-slip determining threshold, it is determined that a cycle-slip occurs in the k th or (k-1) th training sequence cycle. Further, if a second difference obtained by subtracting a phase of the first symbol in the (k+1) th training sequence cycle from a phase of the last symbol in the k th training sequence cycle is greater than the cycle-slip determining threshold, and signs of the first difference and the second difference are opposite, it is determined that a cycle-slip occurs in all symbols in the k th training cycle; or if no, it is determined that a cycle-slip occurs in a data symbol in the (k-1) th training sequence cycle, and a position of the cycle-slip is located. In the present invention, a position at which a cycle-slip occurs can be accurately determined, to avoid a problem of burst continuous bit errors in a received signal caused by the cycle-slip.
摘要翻译：本发明提供了一种循环滑移检测方法和装置以及接收器。如果通过从接收信号中的第（k-1）训练序列周期中的最后一个符号的相位减去第k个训练序列周期中的第一符号的相位获得的第一差异的绝对值大于确定在第k或第（k-1）训练序列周期中发生循环滑移。此外，如果从第k个训练序列周期中的最后一个符号的相位减去第（k + 1）个训练序列周期中的第一符号的相位获得的第二个差异大于循环滑移确定阈值，并且第一差异和第二差异的符号相反，确定在第k个训练周期中的所有符号中出现循环滑移; 或者如果否，则确定在第（k-1）训练序列周期中的数据符号中发生循环滑移，并且定位循环滑移的位置。在本发明中，可以精确地确定发生周期滑移的位置，以避免由循环滑移引起的接收信号中的连续比特错误的突发问题。

5. 发明授权

EP1728372B8 METHOD AND APPARATUS FOR USE IN CARRIER RECOVERY IN A COMMUNICATIONS SYSTEM 有权转让
标题翻译：方法和设备中使用的载波恢复中的通信系统
公开(公告)号：EP1728372B8
公开(公告)日：2013-02-20
申请号：EP04821868.9
申请日：2004-03-22
申请人： Thomson Licensing
发明人： BELOTSERKOVSKY, Max
IPC分类号： H04L27/227 , H03L7/10
CPC分类号： H03L7/10 , H04L27/2273 , H04L2027/0028 , H04L2027/0046 , H04L2027/0057 , H04L2027/0067 , H04L2027/0073 , H04L2027/0079

6. 发明公开

EP1941689A1 SYSTEM AND METHOD OF FREQUENCY ACQUISITION 审中-公开
标题翻译：系统和方法FREQUENZAKQUISITON
公开(公告)号：EP1941689A1
公开(公告)日：2008-07-09
申请号：EP06836588.1
申请日：2006-10-27
申请人： Qualcomm Incorporated
发明人： BREHLER, Matthias , CHALLA, Raghu , MAHAJAN, Amit , SIMIC, Emilija, M.
IPC分类号： H04L27/00 , G01S1/00
CPC分类号： H04L27/0014 , G01S19/235 , G01S19/29 , H04L2027/0046 , H04L2027/0065
摘要： A system, method and device for frequency acquisition. In particular, the embodiments allow for a mobile telephone to simultaneously receive data and/or voice signals while acquiring a GPS signal for its navigation feature. The system, method and device of the present embodiments employ a digital rotator and a local oscillator in concert to acquire the respective signals, correct any frequency errors associated with those signals, and maintain a local timing reference suitable for receiving and transmitting data through a mobile network while simultaneously providing an accurate location through a GPS system.

7. 发明授权

EP1745625B1 CARRIER PHASE AMBIGUITY CORRECTION VIA DC OFFSET 有权
标题翻译：载波相位MEHRDEUTIGKEITSKORREKTUR关于直流偏移
公开(公告)号：EP1745625B1
公开(公告)日：2008-01-23
申请号：EP05740304.0
申请日：2005-04-28
申请人： Thomson Licensing
发明人： EDDE, Gabriel, Alfred , MARKMAN, Ivonete
IPC分类号： H04L25/06
CPC分类号： H04L25/067 , H04L25/061 , H04L27/02 , H04L2027/0046 , H04L2027/0063 , H04L2027/0091
摘要： A receiver comprises a carrier tracking loop (CTL), a filter, a look-up table and a rotator. The CTL provides a baseband signal having in-phase and quadrature signal components. The filter provides a DC-offset level associated with each component to the look-up table, which, in response thereto, provides a phase adjustment signal to the rotator. The latter then rotates the baseband signal as a function of the phase adjustment signal for correcting for carrier phase ambiguity.

8. 发明公开

EP1192745A4 APPARATUS OF COMPENSATING FOR FREQUENCY OFFSET USING PILOT SYMBOL IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM 审中-公开
标题翻译： DEVICE FOR RATE提交补偿使用导频信号。在正交频分复用系统
公开(公告)号：EP1192745A4
公开(公告)日：2007-12-26
申请号：EP00942487
申请日：2000-07-05
申请人： SAMSUNG ELECTRONICS CO LTD
发明人： KIM HYE-JEONG
IPC分类号： H04J11/00 , H04L27/26 , H04B1/707 , H04B1/7087 , H04J13/00 , H04L7/00 , H04L27/00
CPC分类号： H04L27/0014 , H04B1/692 , H04L27/2659 , H04L27/266 , H04L27/2675 , H04L27/2678 , H04L2027/0026 , H04L2027/0046 , H04L2027/0065 , H04L2027/0087
摘要： An apparatus of compensating for a frequency offset using a guard interval and a pilot symbol, which are inserted at a transmitter, in an OFDM (Orthogonal Frequency Division Multiplexing) system. The OFDM system receives an OFDM signal in which a pilot symbol is inserted in data of a frame unit at regular intervals and a guard interval is inserted in a data symbol. In the system, a first carrier synchronizer receives a data symbol stream obtained by converting the OFDM signal to digital data, and detects a guard interval of each data symbol, to compensate for a coarse frequency offset. A fast Fourier transform part OFDM-demodulates a signal output from the first carrier synchronizer. A second carrier synchronizer detects the pilot symbol from the demodulated data symbol stream to compensate for a fine frequency error.

9. 发明授权

EP1505786B1 Verfahren und Vorrichtung zum Schätzen der Frequenz und/oder der Phase einer digitalen Signalfolge 有权
标题翻译：用于估计的频率和/或数字信号序列的相位的方法和装置
公开(公告)号：EP1505786B1
公开(公告)日：2007-12-12
申请号：EP04015133.4
申请日：2004-06-28
申请人： Rohde & Schwarz GmbH & Co. KG
发明人： Schmidt, Kurt, Dr.
IPC分类号： H04L27/00
CPC分类号： H04L27/0014 , H04L2027/0046 , H04L2027/0067

10. 发明公开

EP1641205A2 Schaltung und Verfahren zur Trägerrückgewinnung 有权
标题翻译： Schaltung und Verfahren zurTrägerrückgewinnung
公开(公告)号：EP1641205A2
公开(公告)日：2006-03-29
申请号：EP05018145.2
申请日：2005-08-22
申请人： Micronas GmbH
发明人： Steinbach, Ingo
IPC分类号： H04L27/152
CPC分类号： H04L27/0014 , H03L7/0805 , H04L2027/0032 , H04L2027/0046 , H04L2027/0057
摘要： Die Erfindung bezieht sich auf ein Verfahren zur Trägerrückgewinnung für einen Synchron-Demodulator (SD), bei dem ein Eingangssignal (in) bereitgestellt wird, ein Träger (tr) für das bereitgestellte Eingangssignal (in) rekonstruiert wird und das Eingangssignal (in) und der Träger (tr) gemischt werden, um ein auszugebendes Mischsignal (i, q) zu erzeugen, wobei zum Bereitstellen eines Ausgangssignals (io, qo) ein restlicher Phasenfehler des mischsignals (i, q) mittels einer Phasenverschiebung korrigiert wird. Außerdem wird eine entsprechende Schaltung zum Durchführen eines solchen Verfahrens vorgeschlagen.
摘要翻译：该方法涉及提供输入信号。重建提供的输入信号的载波。混合输入信号和载波以提供输出的混合信号。为了提供输出信号，通过相移校正残留在混合信号中的相位误差。独立权利要求也涵盖了载体恢复的电路。

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