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1. 发明申请

WO2010135060A1 TIMING ERROR ESTIMATION IN A WIMAX RECEIVER 审中-公开
标题翻译： WIMAX接收机的时序误差估计
公开(公告)号：WO2010135060A1
公开(公告)日：2010-11-25
申请号：PCT/US2010/032503
申请日：2010-04-27
申请人： MOTOROLA, INC. , YU, Xiaoyong , ROTTINGHAUS, Alan, P. , WILSON, Timothy, J.
发明人： YU, Xiaoyong , ROTTINGHAUS, Alan, P. , WILSON, Timothy, J.
IPC分类号： H04L27/26 , H04B7/04 , H04L25/02 , H04L5/00
CPC分类号： H04L27/2662 , H04L5/0051 , H04L25/0224 , H04L27/2675
摘要： A method, a system (100) and a receiver device (107) provide timing and frequency correction in a spatial division multiple access (SDMA) system. A timing and frequency correction (TFC) logic/utility (110) obtains a timing error estimate by using pilot symbols on a slot of six tiles. The TFC logic estimates (412, 418) the timing error based on pilot phase differences between unique pairs of tiles when the frequency separation of the tiles is less than a threshold value. When none of the unique pairs of tiles satisfies the threshold value, the TFC logic estimates (412, 414) timing error based on an exhaustive search for each candidate phase error value. The TFC logic performs (426) timing error correction via a timing error estimate based on pilots from the symbols received on each antenna. The TFC logic performs (428) inexplicit frequency error correction according to phase differences based on relative symbol indices.
摘要翻译：方法，系统（100）和接收机设备（107）在空分多址（SDMA）系统中提供定时和频率校正。定时和频率校正（TFC）逻辑/效用（110）通过使用六个瓦片的时隙上的导频符号来获得定时误差估计。当块的频率间隔小于阈值时，TFC逻辑基于独特的瓦片对之间的导频相位差来估计（412,418）定时误差。当没有唯一的瓦片对满足阈值时，TFC逻辑基于对每个候选相位误差值的详尽搜索来估计（412,414）定时误差。 TFC逻辑通过基于在每个天线上接收到的符号的导频的定时误差估计来执行（426）定时纠错。 TFC逻辑根据相对符号索引的相位差执行（428）非均匀频率误差校正。

2. 发明申请

WO2008055094A3 METHOD AND APPARATUS FOR SPUR CANCELLATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING COMMUNICATION SYSTEM 审中-公开
公开(公告)号：WO2008055094A3
公开(公告)日：2008-05-08
申请号：PCT/US2007/082802
申请日：2007-10-29
申请人： MOTOROLA, INC. , YU, Xiaoyong , KOVARIK, Thomas J. , ROTTINGHAUS, Alan P.
发明人： YU, Xiaoyong , KOVARIK, Thomas J. , ROTTINGHAUS, Alan P.
IPC分类号： H04B1/00
摘要： A communication device (120) that is capable of operating in an OFDM communication system provides for cancellation of in-band spurs. The communication device identifies (308) a bin of multiple bins associated with an output of an inverse transformer and comprising a spur and estimates (310) one or more spur phase parameters and a spur amplitude in association with the identified bin. In one embodiment of the present invention, the one or more spur phase parameters includes a spur initial phase and a spur change rate. When the communication device receives (314) a signal from another communication device, the communication device transforms (316) the received signal to produce a multiple parallel output signals that are each associated with a bin of the multiple bins and cancels (318) a spur in an output signal associated with the identified bin based on the estimated one or more spur phase parameters and spur amplitude.

3. 发明申请

WO2008027638A2 SYSTEM AND METHOD FOR DETERMINING A CARRIER TO INTERFERENCE-NOISE RATIO 审中-公开
标题翻译：确定载波干扰噪声比的系统和方法
公开(公告)号：WO2008027638A2
公开(公告)日：2008-03-06
申请号：PCT/US2007/070388
申请日：2007-06-05
申请人： MOTOROLA, INC. , YU, Xiaoyong , WU, Jian, J.
发明人： YU, Xiaoyong , WU, Jian, J.
IPC分类号： H04B7/216
CPC分类号： H04L1/20 , H04B17/318 , H04B17/336 , H04B17/345 , H04L5/003 , H04L27/2647
摘要： An apparatus, method, and computer program product are provided for determining a carrier to interference-noise ratio (CINR) and received signal strength indicator (RSSI) in a wireless communication system. A base station (302-304) calculates (506) a carrier power (C) of at least one user in the wireless communication system, and a noise interference (NI) (514) for one cell or sector in the wireless communication system. The carrier power (C) is divided by the noise interference (NI) to produce a value representative of the carrier to interference-noise ratio (C/NI). The received signal strength indicator (RSSI) is derived (510) by combining weighted carrier power (C) and noise interference (NI).
摘要翻译：提供了用于在无线通信系统中确定载波干扰噪声比（CINR）和接收信号强度指示符（RSSI）的装置，方法和计算机程序产品。基站（302-304）计算（506）无线通信系统中的至少一个用户的载波功率（C）以及无线通信系统中的一个小区或扇区的噪声干扰（NI）（514）。载波功率（C）除以噪声干扰（NI）以产生表示载波干扰噪声比（C / NI）的值。通过组合加权载波功率（C）和噪声干扰（NI）来导出（510）接收信号强度指示符（RSSI）。

4. 发明申请

WO2004042989A1 ITERATIVE DECODING WITH LIKELIHOOD WEIGHTING 审中-公开
标题翻译：迭代解码与LIKELIHOOD称重
公开(公告)号：WO2004042989A1
公开(公告)日：2004-05-21
申请号：PCT/EP2003/050798
申请日：2003-11-07
申请人： MOTOROLA INC , WHINNETT, Nicholas , WOOD, Steven , YU, Xiaoyong
发明人： WHINNETT, Nicholas , WOOD, Steven , YU, Xiaoyong
IPC分类号： H04L1/00
CPC分类号： H04L1/005 , H04L1/0054 , H04L1/0055 , H04L1/0066 , H04L1/0071
摘要： The invention relates to an error correcting decoder apparatus (100) and method. The decoder apparatus (100) comprises a likelihood estimator (101) which generates a sequence of bit value likelihood estimates, such as log likelihood ratios, for multi bit symbols of a data sequence. The decoder apparatus (100) further comprises a decoder element (103), such as a Maximum A Priori (MAP) or appropriate Soft Output Viterbi decoder. The decoder element (103) generates a decoded data sequence in response to the bit value likelihood estimates. The decoder apparatus (100) also comprises a weighting processor (105) which generates a weighted compensation data sequence from the decoded data sequence. The weighted compensation data is used to modify the sequence of bit value likelihood estimates. The decoding is subsequently repeated using the improved bit value likelihood estimates whereby improved decoding performance is achieved. The invention may be applied to a two decoder element decoding apparatus (200) and may specifically be applied to turbo decoders.
摘要翻译：本发明涉及一种纠错解码装置（100）及方法。解码器装置（100）包括对于数据序列的多位符号产生位值似然估计序列（例如对数似然比）的似然估计器（101）。解码器装置（100）还包括诸如最大优先（MAP）或适当的软输出维特比解码器的解码器元件（103）。解码器元件（103）响应于位值似然估计产生解码数据序列。解码装置（100）还包括加权处理器（105），其从解码数据序列生成加权补偿数据序列。加权补偿数据用于修改比特值似然估计的序列。随后使用改进的比特值似然估计重复解码，由此实现改进的解码性能。本发明可以应用于两个解码器元件解码装置（200），并且可以具体地应用于turbo解码器。

5. 发明申请

WO2010033345A2 METHOD AND SYSTEM FOR RADIO FREQUENCY (RF) GROUP DELAY COMPENSATION IN A BROADBAND SYSTEM 审中-公开
标题翻译：无线电频率（RF）群延迟补偿在宽带系统中的方法和系统
公开(公告)号：WO2010033345A2
公开(公告)日：2010-03-25
申请号：PCT/US2009/054721
申请日：2009-08-24
申请人： MOTOROLA, INC. , YU, Xiaoyong
发明人： YU, Xiaoyong
IPC分类号： H04B7/26 , H04L27/26 , H04W88/02
CPC分类号： H04L27/2657 , H04L27/2613 , H04L27/2675 , H04L2027/0067 , H04L2027/0095
摘要： A radio device (102) operable to compensate for a large RF filter group delay variation is provided. The radio device includes a receiving unit (245) operable to receive an OFDM signal that comprises pilot subcarrier signals and data subcarrier signals. The radio device further includes a group delay (GD) compensator (385), operable in frequency domain, and configured to perform phase rotation to correct a group delay individually on tones of an OFDM symbol. The phase rotation is calculated as a function of the phase shifts of the received pilot subcarrier signals and subcarrier index.
摘要翻译：提供可操作以补偿大的RF滤波器组延迟变化的无线电设备（102）。无线电设备包括接收单元（245），其可操作以接收包括导频子载波信号和数据子载波信号的OFDM信号。无线电设备还包括在频域中可操作并被配置为执行相位旋转以在OFDM符号的音调上单独校正组延迟的组延迟（GD）补偿器（385）。根据接收到的导频副载波信号和子载波索引的相移来计算相位旋转。

6. 发明申请

WO2007040893A3 METHOD AND APPARATUS FOR A LOW-DENSITY PARITY-CHECK DECODER 审中-公开
公开(公告)号：WO2007040893A3
公开(公告)日：2007-04-12
申请号：PCT/US2006/034719
申请日：2006-09-06
申请人： MOTOROLA, INC. , YU, Xiaoyong
发明人： YU, Xiaoyong
IPC分类号： H03M13/11
摘要： A low-density parity-check (LDPC) decoder (304) has a memory (308), and a processor (306). The processor is programmed to initialize (202) the LDPC decoder, calculate (204) a probability for each check node, calculate (206) a probability for each bit node, calculate soft decisions, update the bit nodes according to the calculated soft decisions, calculate (208) values from the calculated soft decisions, perform (210) a parity check on the calculated values, update (218) log-likelihood ratios (LLRs) if a bit error is detected in the calculated values, update the bit nodes according to the updated LLRs, and repeat the foregoing post initialization steps.

7. 发明申请

WO2009026050A1 METHOD AND APPARATUS FOR CARRIER POWER AND INTERFERENCE-NOISE ESTIMATION IN SPACE DIVISION MULTIPLE ACCESS AND MULTIPLE-INPUT/MULTIPLE-OUTPUT WIRELESS COMMUNICATION SYSTEMS 审中-公开
标题翻译：空间分集多路访问和多输入/多输出无线通信系统中载波功率和干扰噪声估计的方法与装置
公开(公告)号：WO2009026050A1
公开(公告)日：2009-02-26
申请号：PCT/US2008/072910
申请日：2008-08-12
申请人： MOTOROLA, INC. , YU, Xiaoyong , WU, Jian J.
发明人： YU, Xiaoyong , WU, Jian J.
IPC分类号： H04B1/10
CPC分类号： H04L27/2647 , H04B7/0845 , H04B17/26 , H04B17/309 , H04B17/318 , H04B17/336 , H04L25/03159
摘要： Estimates of carrier signal power S and interference-noise NI at the output of the equalizer in a wireless communication system is obtained by (i) determining (406) the variance, σ 2 z , of the noise at the output of the equalizer dependent upon the equalization matrix, WH and an estimate of the variance σ 2 of the noise at the receiving antennas, (ii) determining (412) the interference, σ 2 l , at the output of the equalizer dependent upon the equalization matrix, W H , a transfer function matrix, H, of transmission paths between transmitting antennas and receiving antennas, and an estimate σ 2 x of the variance of the transmitted signals and (iii) determining (410) the power, S , of the carrier signal at the output of the equalizer dependent upon W H , H and σ 2 x . The estimate of the interference-noise NI is calculated as NI = σ 2 l + σ 2 z . These values may be used to facilitate adaptation of the wireless communication system.
摘要翻译：通过以下步骤获得在无线通信系统中的均衡器的输出处的载波信号功率S和干扰噪声NI的估计：（i）确定（406）均衡器的输出处的噪声的方差s2z，这取决于均衡矩阵，WH和在接收天线处的噪声的方差s 2的估计，（ii）根据均衡矩阵WH，在均衡器的输出端确定（412）干扰s2 l，传递函数矩阵，H，发送天线和接收天线之间的传输路径，以及发射信号的方差的估计s2 x，以及（iii）根据均衡器的输出确定（410）载波信号的功率S WH，H和s2 x。干扰噪声NI的估计值计算为NI = s2 l + s2 z。这些值可以用于促进无线通信系统的适配。

8. 发明申请

WO2008027636A1 BLOCK CODEWORD DECODER WITH CONFIDENCE INDICATOR 审中-公开
标题翻译：带有信号指示器的块编码解码器
公开(公告)号：WO2008027636A1
公开(公告)日：2008-03-06
申请号：PCT/US2007/070302
申请日：2007-06-04
申请人： MOTOROLA, INC. , YU, Xiaoyong , CHEN, Xiangyang , WU, Jian J.
发明人： YU, Xiaoyong , CHEN, Xiangyang , WU, Jian J.
IPC分类号： H04L1/00
CPC分类号： H04L1/0057 , H04L25/067
摘要： A wireless transceiver (100) that produces soft decisions for received, block error correction encoded codewords and a confidence indicator signifying a likelihood of errors in the detected data. The wireless transceiver (100) processes block encrypted signals, such as feedback channel messages in a WiMax uplink. Upon receiving a signal, a soft decision is determined for received block encoded codewords. A difference is calculated between a soft decision metric for a most likely detected codeword and a soft decision metric for a next most likely detected codeword. This difference is normalized based upon the total decoder input power received over the received signal (201 ). The normalized difference is then scaled by a channel dependent factor and is time filtered. The normalized and time filtered confidence indicator output (212) is able to be provided to a wireless network controller to assess the usability of the received data.
摘要翻译：一种无线收发器（100），其产生用于接收到的块错误校正编码码字的软判决，以及表示检测到的数据中的错误的可能性的置信度指示符。无线收发器（100）处理块加密信号，例如WiMax上行链路中的反馈信道消息。在接收到信号时，确定接收的块编码码字的软判决。在最可能检测到的码字的软判决度量与下一个最可能的检测码字的软判决度量之间计算差。该差异是基于在接收信号（201）上接收的总解码器输入功率而被归一化的。然后通过信道相关因子对归一化差异进行缩放，并进行时间滤波。归一化和时间滤波的置信度指示符输出（212）能够被提供给无线网络控制器以评估所接收数据的可用性。

9. 发明申请

WO2009070441A1 DIGITAL PRE-DISTORTION FOR ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SIGNALS 审中-公开
标题翻译：正交频分多址（OFDM）信号的数字预失真
公开(公告)号：WO2009070441A1
公开(公告)日：2009-06-04
申请号：PCT/US2008/083099
申请日：2008-11-11
申请人： MOTOROLA, INC. , YU, Xiaoyong
发明人： YU, Xiaoyong
IPC分类号： H04J11/00 , H04B1/10 , H04L27/26
CPC分类号： H04L27/2624
摘要： A method (300) and a system (100) for processing an orthogonal frequency division multiplexing (OFDM) signal. At least one portion of an OFDM symbol (125) that exceeds an amplitude limiting threshold can be identified. The identified portion of the OFDM symbol (125) can be filtered to generate a pre-distortion noise (145). The OFDM symbol (125) and the pre-distortion noise (145) can be combined to generate a pre-distorted OFDM symbol (165).
摘要翻译：一种用于处理正交频分复用（OFDM）信号的方法（300）和系统（100）。可以识别超过限幅阈值的OFDM符号（125）的至少一部分。可以对OFDM符号（125）的识别部分进行滤波以产生预失真噪声（145）。可以组合OFDM符号（125）和预失真噪声（145）以产生预失真的OFDM符号（165）。

10. 发明申请

WO2008033111A2 SAMPLING OF DATA STREAMS AND SUPPORTING METHODS AND APPARATUS 审中-公开
标题翻译：数据流的采样和支持方法和设备
公开(公告)号：WO2008033111A2
公开(公告)日：2008-03-20
申请号：PCT/US2006/024605
申请日：2006-06-23
申请人： MOTOROLA, INC. , YU, Xiaoyong , KLOOS, Michael, N.
发明人： YU, Xiaoyong , KLOOS, Michael, N.
IPC分类号： H04K1/10 , H04L27/28
CPC分类号： H04L27/2657 , H04L27/2662
摘要： In the present sampling technique of a transmitted data stream, a data stream is divided (318, 504) into a predefined number of sample streams to provide a plurality of sample streams, and for at least two of these sample streams, a metric value is assessed (324, 514, 516) and compared (328, 518) to provide a selected sample stream that is likely to resemble transmitted tones as represented by the data stream. The selected sample stream is then accordingly provided (330, 520) for output.
摘要翻译：在传输数据流的当前采样技术中，数据流被划分成预定数量的采样流，以提供多个样本流，并且对于这些采样流中的至少两个，度量值是评估（324,514,516）并比较（328,518）以提供可能类似于由数据流表示的传输音调的所选样本流。然后相应地提供所选择的采样流（330,520）用于输出。

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