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1. 发明申请

WO2012088280A2 AUTOMATIC FREQUENCY CONTROL UNDER LOW SIGNAL-TO-NOISE CONDITIONS 审中-公开
标题翻译：低信噪比条件下的自动频率控制
公开(公告)号：WO2012088280A2
公开(公告)日：2012-06-28
申请号：PCT/US2011/066507
申请日：2011-12-21
申请人： MICROCHIP TECHNOLOGY INCORPORATED , NÈMETH, Jòzsef G. , KOVÀCS, Péter, Szilveszter
发明人： NÈMETH, Jòzsef G. , KOVÀCS, Péter, Szilveszter
IPC分类号： H04L27/00
CPC分类号： H04L27/0014 , H04L2027/0046 , H04L2027/0065 , H04L2027/0071 , H04L2027/0095
摘要： A method for determining the carrier frequency offset and the corresponding sample-to- sample phase shift present in the sampled digital signal from the radio of a wireless transceiver is specified. The method divides the CFO range to be covered into a number of intervals and creates, from the received signal, as many parallel derived streams as there are interval endpoints, pre -compensating ("back rotating") the input by the sample-to-sample phase shift corresponding to the particular endpoint. It computes the magnitude and phase values of the correlation of a preamble pattern period with the preamble segment of each derived stream in parallel and uses the largest resulting magnitude value(s) to zoom in on the actual CFO present in the input stream. In order to improve accuracy in the presence of noise and provided there is still input preamble left to work on, it repeats the search for a shorter interval centered on the CFO value located in the first run. The finally located CFO value and the phase value from the corresponding correlation computation then determine the actual CFO and the corresponding sample-to-sample phase shift to be applied for pre- compensation ("back rotation") in an open-loop AFC.
摘要翻译：规定了用于确定来自无线收发器的无线电的采样数字信号中存在的载波频率偏移和相应的采样至采样相移的方法。该方法将要覆盖的CFO范围划分为多个区间并且根据接收到的信号来创建与间隔端点一样多的并行导出流，由样本到输出的预补偿（“反向旋转”）输入 - 对应于特定端点的样本相移。它并行计算前导码模式周期与每个派生数据流的前导段的相关性的幅度和相位值，并使用最大的结果幅度值放大输入流中存在的实际CFO。为了提高存在噪声时的准确性，并且仍然需要输入前导码，请重复搜索以第一次运行中CFO值为中心的较短间隔。最终定位的CFO值和来自对应的相关性计算的相位值然后确定实际CFO以及要应用于开环AFC中的预补偿（“反向旋转”）的对应样本 - 样本相移。

2. 发明申请

WO2009069876A1 RECURSIVE DEMODULATION APPARATUS AND METHOD 审中-公开
标题翻译：回归解调装置和方法
公开(公告)号：WO2009069876A1
公开(公告)日：2009-06-04
申请号：PCT/KR2008/004402
申请日：2008-07-29
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE , HAHM, Young Kwon , JIN, Eun Sook , SONG, Yun Jeong , LEE, Soo In
发明人： HAHM, Young Kwon , JIN, Eun Sook , SONG, Yun Jeong , LEE, Soo In
IPC分类号： H03D3/00
CPC分类号： H04L27/38 , H04L2027/003 , H04L2027/0046 , H04L2027/0067
摘要： A recursive demodulation apparatus is provided. Therecursive demodulation apparatus, including: a segment generation unit dividing data symbols with a residual frequency or phase error into a predetermined number of data symbols, and generating a plurality of segments, each of the plurality of segments including the predetermined number of data symbols; and a phase error correction unit sequentially correcting a phase error of each of the data symbols, included in the each of the plurality of segments, for each segment.
摘要翻译：提供递归解调装置。一种解调装置，包括：段生成单元，将具有残差频率或相位误差的数据符号划分为预定数量的数据符号，并生成多个段，所述多个段中的每一个包括预定数目的数据符号; 以及相位误差校正单元，对于每个段，顺序地校正包括在所述多个段中的每一个中的每个数据符号的相位误差。

3. 发明申请

WO2006078860A8 STORAGE EFFICIENT SLIDING WINDOW SUM 审中-公开
标题翻译：存储高效滑动窗口SUM
公开(公告)号：WO2006078860A8
公开(公告)日：2007-08-09
申请号：PCT/US2006001969
申请日：2006-01-19
申请人： MARVELL WORLD TRADE LTD
发明人： WANG CINDY CHUN , XU XIANGYANG SIMON , CHEN XIAOCHU
IPC分类号： H04B1/69
CPC分类号： H04L27/22 , H03K2005/00241 , H04L27/2275 , H04L2025/03401 , H04L2027/0046 , H04L2027/0063
摘要： A delay buffer includes a first shift register (50) receiving input data and having a shift signal input port. The first shift register right shifts the input data responsive to a shift signal on the shift signal input port. The shift signal is determined based on an effective bit width of the input data. A first delay line (56) receives the shifted data from the first shift register while a second delay line (58) of equal length to the first delay line receives the shift signal. A second shift register (60) receives the output from the first delay line and receives the output of the second delay line on a shift signal input port (62). The second shift register then left shifts the data contained therein according to the shift signal.
摘要翻译：延迟缓冲器包括接收输入数据并具有移位信号输入端口的第一移位寄存器（50）。第一移位寄存器根据移位信号输入端口上的移位信号，右移位输入数据。基于输入数据的有效位宽来确定移位信号。第一延迟线（56）从第一移位寄存器接收移位的数据，而与第一延迟线等长的第二延迟线（58）接收移位信号。第二移位寄存器（60）接收来自第一延迟线的输出，并接收移位信号输入端口（62）上的第二延迟线的输出。然后，第二移位寄存器根据移位信号移位其中包含的数据。

4. 发明申请

WO2006092641A1 ACQUISITION OF A WIRELESS REVERSE LINK SIGNAL AFFECTED BY DOPPLER FREQUENCY DRIFT 审中-公开
标题翻译：无线反向链路信号的获取受多普勒频率干扰影响
公开(公告)号：WO2006092641A1
公开(公告)日：2006-09-08
申请号：PCT/IB2005/000517
申请日：2005-03-01
申请人： NOKIA CORPORATION , ZHENGDI, Qin , VALIO, Harri
发明人： ZHENGDI, Qin , VALIO, Harri
IPC分类号： H04B1/707 , H04L27/00
CPC分类号： H04L27/0014 , H04B1/7075 , H04L2027/0046 , H04L2027/0067
摘要： The invention relates to supporting an acquisition of a signal, wherein the signal comprises a sequence of complex valued samples, wherein the acquisition comprises an integration of the complex valued samples in subsequent integration intervals, and wherein the signal may be subject to a frequency drift. In order to enable an improved acquisition, a phase angle is estimated in the signal in a respective integration interval (step 504). The samples are adjusted based on the estimated phase angle in a respective integration interval (step 505). Only the adjusted samples from a plurality of integration intervals are then integrated (step 507, 508).
摘要翻译：本发明涉及支持对信号的获取，其中所述信号包括一系列复值样本，其中所述获取包括所述复值样本在随后的积分间隔中的积分，并且其中所述信号可能经历频率漂移。为了能够进行改进的采集，在相应的积分间隔中在信号中估计相位角（步骤504）。基于相应积分间隔中的估计相位角来调整样本（步骤505）。然后仅集成来自多个积分间隔的经调整的样本（步骤507,508）。

5. 发明申请

WO2006020741A3 METHOD AND APPARATUS FOR IMPLEMENTING SPACE FREQUENCY BLOCK CODING 审中-公开
标题翻译：实现空间频率编码的方法和装置
公开(公告)号：WO2006020741A3
公开(公告)日：2006-06-01
申请号：PCT/US2005028487
申请日：2005-08-11
申请人： INTERDIGITAL TECH CORP , KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
发明人： KWAK JAEYOUNG , OLESEN ROBERT LIND , BULTAN AYKUT , ZEIRA ELDAD , KOO CHANG-SOO , OZLUTURK FATIH , HUANG YUEJIN , PASAD KALPENDU R
IPC分类号： H04J99/00 , H04L27/08
CPC分类号： H04L1/0606 , H04B7/0417 , H04B7/0626 , H04B7/0632 , H04B7/066 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L5/0007 , H04L5/0023 , H04L5/006 , H04L27/156 , H04L27/2626 , H04L2027/0046 , Y02D50/10
摘要： The present invention is related to a method and apparatus for implementing space frequency block coding (SFBC) in an orthogonal frequency division multiplexing (OFDM) wireless communication system. The present invention is applicable to both a closed loop mode and an open loop mode. In the closed loop mode, power loading and eigen-beamforming are performed based on channel state information (CSI). A channel coded data stream is multiplexed into two or more data streams. Power loading is performed based on the CSI on each of the multiplexed data streams. SFBC encoding is performed on the data streams for each of the paired subcarriers. Then, eigen-beamforming is performed based on the CSI to distribute eigenbeams to multiple transmit antennas. The power loading may be performed on two or more SFBC encoding blocks or on each eigenmodes. Additionally, the power loading may be performed across subcarriers or subcarrier groups for weak eigenmodes.
摘要翻译：本发明涉及一种用于在正交频分复用（OFDM）无线通信系统中实现空间频率块编码（SFBC）的方法和装置。本发明适用于闭环模式和开环模式。在闭环模式中，基于信道状态信息（CSI）执行功率负载和特征波束形成。信道编码数据流被多路复用为两个或多个数据流。基于每个复用数据流上的CSI执行功率加载。对每个配对子载波的数据流执行SFBC编码。然后，基于CSI执行特征波束形成，以将本征束分布到多个发射天线。功率加载可以在两个或更多个SFBC编码块上或在每个本征模上执行。另外，对于弱本征模式，可以跨子载波或子载波组执行功率负载。

6. 发明申请

WO2005096578A1 METHOD AND APPARATUS FOR USE IN CARRIER RECOVERY IN A COMMUNICATIONS SYSTEM 审中-公开
标题翻译：用于通信系统中载波恢复的方法和装置
公开(公告)号：WO2005096578A1
公开(公告)日：2005-10-13
申请号：PCT/US2004/008743
申请日：2004-03-22
申请人： THOMSON LICENSING S.A. , BELOTSERKOVSKY, Max
发明人： BELOTSERKOVSKY, Max
IPC分类号： H04L27/227
CPC分类号： H03L7/10 , H04L27/2273 , H04L2027/0028 , H04L2027/0046 , H04L2027/0057 , H04L2027/0067 , H04L2027/0073 , H04L2027/0079
摘要： A receiver includes a digital phase locked loop (PLL) for performing carrier recovery. The digital PLL further includes a phase error estimator driven by hard decisions and an integrator, which accumulates a phase error signal provided by the phase error estimator. To reduce the acquisition time, the digital PLL is run in an open-loop mode during which an estimate of the carrier frequency offset is determined as a function of the phase error signal. After the estimate of the carrier frequency offset is determined, the integrator is pre-loaded with the determined estimate and the digital PLL is run in a closed-loop mode.
摘要翻译：接收机包括用于执行载波恢复的数字锁相环（PLL）。数字PLL还包括由硬判决驱动的相位误差估计器和累积由相位误差估计器提供的相位误差信号的积分器。为了减少采集时间，数字PLL以开环模式运行，在该模式期间，载波频率偏移的估计被确定为相位误差信号的函数。在确定了载波频率偏移的估计之后，积分器对所确定的估计进行预加载，并且数字PLL以闭环模式运行。

7. 发明申请

WO2005086444A1 METHOD AND APPARATUS FOR CARRIER RECOVERY IN A COMMUNICATIONS SYSTEM 审中-公开
标题翻译：通信系统中载波恢复的方法和装置
公开(公告)号：WO2005086444A1
公开(公告)日：2005-09-15
申请号：PCT/US2004/004702
申请日：2004-02-19
申请人： THOMSON LICENSING S.A. , KOSLOV, Joshua
发明人： KOSLOV, Joshua
IPC分类号： H04L27/00
CPC分类号： H04L27/0014 , H04L27/3488 , H04L2027/0046
摘要： A satellite communications system comprises a transmitter, a satellite transponder and a receiver. The transmitter transmits an uplink layered modulation signal having an upper layer and a lower layer to the satellite transponder, which broadcasts the layered modulation signal downlink to one, or more, receivers. The receiver receives the layered modulation signal (the received signal) and performs demodulation and decoding of the lower layer signal component thereof by using a recovered carrier to derotate the received signal, wherein the recovered carrier is developed by a carrier recovery process driven by soft decisions with respect to the upper layer signal component of the received signal.
摘要翻译：卫星通信系统包括发射机，卫星转发器和接收机。发射机将具有上层和下层的上行分层调制信号发送到卫星转发器，卫星转发器向下一个或多个接收机广播分层调制信号。接收机接收分层调制信号（接收信号），并通过使用恢复的载波对其接收信号进行解调，对其下层信号分量进行解调和解码，其中通过软判决驱动的载波恢复过程来形成恢复的载波相对于接收信号的上层信号分量。

8. 发明申请

WO2003058839A1 RAKE RECEIVER WITH INDIVIDUAL FINGER COMPENSATOR(S) 审中-公开
标题翻译：具有独立手指补偿器的接收器（S）
公开(公告)号：WO2003058839A1
公开(公告)日：2003-07-17
申请号：PCT/IB2002/005352
申请日：2002-12-09
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , XU, Luzhou , WANG, Dong
发明人： XU, Luzhou , WANG, Dong
IPC分类号： H04B1/707
CPC分类号： H04B1/712 , H04B1/7117 , H04B2201/70701 , H04L2027/0046
摘要： Rake receivers in code division multiple access (CDMA) telecommunication comprise fingers (1,2,3) with each finger processing signal components for a particular transmission path to be able to better synchronize with a RF signal received via different paths, and a combiner (4) for combining the results originating from said fingers, and a compensator in the form of a controlled oscillator in a feedback loop. By locating a finger compensator (20-25) in a finger, said finger can handle complex situations, like Doppler shifts under high-speed conditions. Preferably, most or all fingers each comprise such a finger compensator, in which case said feedback loop can be avoided. Such a finger compensator can be hardware, software or a mixture of both when comprising a filter (21) plus an amplitude normalizer (22) between two arithmetical modules (20,25) for multiplying an input symbol signal with a conjugated previous input symbol signal and an output symbol signal with a previous output symbol signal.
摘要翻译：码分多址（CDMA）通信中的耙式接收机包括手指（1,2,3），每个手指处理信号分量用于特定传输路径，以便能够更好地与经由不同路径接收的RF信号同步，以及组合器 4）用于组合来自所述手指的结果，以及在反馈回路中以受控振荡器的形式的补偿器。通过将手指补偿器（20-25）定位在手指中，所述手指可以处理复杂的情况，如在高速条件下的多普勒频移。优选地，大多数或全部手指均包括这种手指补偿器，在这种情况下可以避免所述反馈回路。当包括在两个算术模块（20,25）之间的过滤器（21）加上幅度归一化器（22）时，这种手指补偿器可以是硬件，软件或两者的混合，用于将输入符号信号与共轭先前输入符号信号以及具有先前输出符号信号的输出符号信号。

9. 发明申请

WO02058250A3 CARRIER PHASE RECOVERY SYSTEM FOR ADAPTIVE BURST MODEMS AND LINK HOPPING RADIO NETWORKS 审中-公开
标题翻译：用于自适应BURST模式和链接无线电网络的载波相位恢复系统
公开(公告)号：WO02058250A3
公开(公告)日：2003-05-30
申请号：PCT/US0201153
申请日：2002-01-16
申请人： RADIANT NETWORKS PLC
发明人： RAFIE MANOUCHEHR S , SHAH TUSHAR , HWANG SYANG-MYAU , LU JUN
IPC分类号： H04B1/713 , H04L27/00 , H04L27/38 , H04L27/233
CPC分类号： H04L27/0014 , H04L27/3818 , H04L2027/003 , H04L2027/0046 , H04L2027/0053 , H04L2027/0087
摘要： A method for a carrier phase recovery apparatus in a multiple-link hopping radio system includes hopping among a plurality of radio links to receive bursts of radio signals on the plurality of radio links and determining channel information for each radio link from a received burst on the radio link. Further, the method includes storing the determined channel information and using the determined channel information for the radio link to reliably recover the carrier phase of a next received burst on the radio link.
摘要翻译：一种用于多链路跳频无线电系统中的载波相位恢复装置的方法，包括多个无线电链路之间的跳频，以在多个无线电链路上接收无线电信号的突发，并且从所接收的突发中确定每个无线电链路的信道信息无线电链路。此外，该方法包括存储所确定的信道信息并使用所确定的无线电链路的信道信息来可靠地恢复无线链路上的下一个接收突发的载波相位。

10. 发明申请

WO1998017037A1 METHOD AND APPARATUS FOR DECISION DIRECTED DEMODULATION USING ANTENNA ARRAYS AND SPATIAL PROCESSING 审中-公开
标题翻译：使用天线阵列和空间处理的决策指导解调的方法和装置
公开(公告)号：WO1998017037A1
公开(公告)日：1998-04-23
申请号：PCT/US1997018745
申请日：1997-10-10
申请人： ARRAYCOMM, INC. , BARRATT, Craig , FARZANEH, Farhad , PARISH, David, M.
发明人： ARRAYCOMM, INC.
IPC分类号： H04L27/22
CPC分类号： H04L1/06 , H04L27/2332 , H04L2027/003 , H04L2027/0046 , H04L2027/0095
摘要： A method and apparatus for generating a reference signal (631) for use in an alternating projection loop which is part of demodulation in a base station of a wireless communication system, the reference signal (631) relaxed to minimize the effect of frequency offset and amplitude variations, the base station including an array of antennas (110.1-110.4). The alternating projection loop demodulates in the presence of co-channel interference and includes correction for time alignment and/or frequency offset.
摘要翻译：一种用于产生参考信号（631）的方法和装置，用于在无线通信系统的基站中作为解调的一部分的交替投影环路中使用，参考信号（631）放宽以最小化频率偏移和振幅的影响变化，基站包括天线阵列（110.1-110.4）。在存在同信道干扰的情况下，交替投影环路进行解调，并且包括用于时间对准和/或频率偏移的校正。

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