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1.发明申请METHODS AND SYSTEMS FOR FREQUENCY DOMAIN GAIN CONTROL IN OFDM MIMO SYSTEMS 失效OFDM MIMO系统中频域增益控制的方法与系统公开(公告)号：US20100202571A1
公开(公告)日：2010-08-12
申请号：US12688760
申请日：2010-01-15
IPC分类号： H04L27/06
CPC分类号： H04L25/03159 , H04L25/0246 , H04L25/03292 , H04L25/03299 , H04L27/2647 , H04L2025/03426 , H04W52/42
摘要： Certain embodiments of the present disclosure provide a method for frequency-domain gain control in system utilizing orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO). The proposed method reduces the complexity of the system while maximizing the internal accuracy of the OFDM MIMO decoder and preserving the performance of the system.
摘要翻译： 本公开的某些实施例提供了一种利用正交频分复用（OFDM）多输入多输出（MIMO）的系统中的频域增益控制的方法。 所提出的方法降低了系统的复杂性，同时最大化了OFDM MIMO解码器的内部精度并保持了系统的性能。
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公开(公告)号：US08923424B2
公开(公告)日：2014-12-30
申请号：US12711128
申请日：2010-02-23
申请人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
发明人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
CPC分类号： H04L25/03229 , H04B7/0413 , H04L25/03242 , H04L25/03318 , H04L2025/0342 , H04L2025/03426
摘要： Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.
摘要翻译： 本文描述了为了解复用用于多信道无线通信的接收的无线数据流而提供降低的复杂度或提高的精度。 作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。 在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。 在其他示例中，可以对该子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。 根据至少另一个示例，算法的对数项可以用非对数函数来近似，例如查找表，串联展开，多项式近似等。 这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。
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公开(公告)号：US20110206151A1
公开(公告)日：2011-08-25
申请号：US12711128
申请日：2010-02-23
申请人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
发明人： Michael L. McCloud , Matthias Brehler , Ju Won Park , Jong Hyeon Park , Je Woo Kim , Inyup Kang , Brian C. Banister
CPC分类号： H04L25/03229 , H04B7/0413 , H04L25/03242 , H04L25/03318 , H04L2025/0342 , H04L2025/03426
摘要： Providing for reduced complexity or improved accuracy in de-mapping received wireless data streams for multi-channel wireless communication is described herein. By way of example, a low-complexity likelihood algorithm can be employed to de-map data bits from the wireless data streams. In one particular example, the likelihood algorithm can approximate a received bit with a subset of received wireless symbols correlated the bit, reducing algorithm complexity. In other examples, a limited set of received wireless symbols can be employed for the subset, further reducing algorithm complexity. According to at least one other example, logarithmic terms of the algorithm can be approximated with non-logarithmic functions, such as a look-up table, series expansion, polynomial approximation, or the like. These approximations can enhance symbol de-mapping accuracy while maintaining or improving processing overhead for a wireless receiver.
摘要翻译： 本文描述了为了解复用用于多信道无线通信的接收的无线数据流而提供降低的复杂度或提高的精度。 作为示例，可以采用低复杂度似然算法来从无线数据流解映射数据比特。 在一个特定示例中，似然算法可以用接收到的无线符号的子集近似接收到的比特，从而降低算法的复杂度。 在其他示例中，可以对该子集采用有限的一组接收到的无线符号，进一步降低了算法的复杂度。 根据至少另一个示例，算法的对数项可以用非对数函数来近似，例如查找表，串联展开，多项式近似等。 这些近似可以增强符号解映射精度，同时保持或改善无线接收机的处理开销。
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4.发明授权Methods and systems for frequency domain gain control in OFDM MIMO systems 失效OFDM MIMO系统中频域增益控制的方法和系统公开(公告)号：US08284875B2
公开(公告)日：2012-10-09
申请号：US12688760
申请日：2010-01-15
IPC分类号： H04L27/06
CPC分类号： H04L25/03159 , H04L25/0246 , H04L25/03292 , H04L25/03299 , H04L27/2647 , H04L2025/03426 , H04W52/42
摘要： Certain embodiments of the present disclosure provide a method for frequency-domain gain control in system utilizing orthogonal frequency division multiplexing (OFDM) multiple input multiple output (MIMO). The proposed method reduces the complexity of the system while maximizing the internal accuracy of the OFDM MIMO decoder and preserving the performance of the system.
摘要翻译： 本公开的某些实施例提供了一种利用正交频分复用（OFDM）多输入多输出（MIMO）的系统中的频域增益控制的方法。 所提出的方法降低了系统的复杂性，同时最大化了OFDM MIMO解码器的内部精度并保持了系统的性能。
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5.发明授权Smooth edge distortion in broadband channel interpolation via virtual pilot extrapolation 失效通过虚拟导频外推的宽带信道插值中的平滑边缘失真公开(公告)号：US08611340B2
公开(公告)日：2013-12-17
申请号：US12614435
申请日：2009-11-08
IPC分类号： H04L5/02
CPC分类号： H04L25/0202 , H04L25/022 , H04L25/024 , H04L25/0242
摘要： In the basic transform domain (linear filtering interpolation) technique for channel estimation at the receiver in a wireless communication system, the improvement of providing channel estimation at the receiver with computational efficiency, comprising: extending the pilot support to move the effective edges of the pilot data further from the channel span of interest, that corresponds to data transmission.
摘要翻译： 在无线通信系统中在接收机处进行信道估计的基本变换域（线性滤波插值）技术中，改进了在接收机处以计算效率提供信道估计的方法，包括：扩展导频支持以移动导频的有效边缘 从感兴趣的信道跨度进一步的数据，对应于数据传输。
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6.发明申请SMOOTH EDGE DISTORTION IN BROADBAND CHANNEL INTERPOLATION VIA VIRTUAL PILOT EXTRAPOLATION 失效宽带通道插入中的平滑边缘畸变通过虚拟导弹提取公开(公告)号：US20100195518A1
公开(公告)日：2010-08-05
申请号：US12614435
申请日：2009-11-08
CPC分类号： H04L25/0202 , H04L25/022 , H04L25/024 , H04L25/0242
摘要： In the basic transform domain (linear filtering interpolation) technique for channel estimation at the receiver in a wireless communication system, the improvement of providing channel estimation at the receiver with computational efficiency, comprising: extending the pilot support to move the effective edges of the pilot data further from the channel span of interest, that corresponds to data transmission.
摘要翻译： 在无线通信系统中在接收机处进行信道估计的基本变换域（线性滤波插值）技术中，改进了在接收机处以计算效率提供信道估计的方法，包括：扩展导频支持以移动导频的有效边缘 从感兴趣的信道跨度进一步的数据，对应于数据传输。
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7.发明申请DOWNLINK FLOW CONTROL BY ADDING NOISE TO A RECEIVER TO REDUCE PHYSICAL LAYER THROUGHPUT 审中-公开通过向收件人添加噪声来降低物理层的下行流量控制公开(公告)号：US20120176922A1
公开(公告)日：2012-07-12
申请号：US13344322
申请日：2012-01-05
IPC分类号： H04W24/00
CPC分类号： H04W28/0205 , H04L1/0017 , H04L1/20 , H04W72/1226
摘要： Aspects of the present disclosure relate to wireless communications and techniques and apparatus for downlink flow control at the physical layer of a user equipment (UE). Aspects generally include monitoring one or more parameters related to the UE and intentionally reducing channel quality based on the one or more parameters to trigger downlink flow control. According to aspects, channel quality may be reduced by degrading receiver performance and/or intentionally adding noise to a signal.
摘要翻译： 本公开的方面涉及在用户设备（UE）的物理层处的用于下行链路流量控制的无线通信和技术和装置。 方面通常包括监视与UE有关的一个或多个参数，并基于一个或多个参数有意降低信道质量以触发下行链路流控制。 根据方面，可以通过降低接收机性能和/或有意地向信号添加噪声来减少信道质量。
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8.发明授权Iterative interference canceler for wireless multiple-access systems with multiple receive antennas 有权具有多个接收天线的无线多址系统的迭代干扰消除器公开(公告)号：US08121176B2
公开(公告)日：2012-02-21
申请号：US12916389
申请日：2010-10-29
CPC分类号： H04B1/7115 , H04B1/71075 , H04B1/712 , H04B7/0845 , H04B7/0894 , H04B2201/70702 , H04J11/0063
摘要： This invention teaches to the details of an interference canceling receiver for canceling intra-cell and inter-cell interference in coded, multiple-access, spread spectrum transmissions that propagate through frequency selective communication channels to a multiplicity of receive antennas. The receiver is designed or adapted through the repeated use of symbol-estimate weighting, subtractive cancellation with a stabilizing step-size, and mixed-decision symbol estimates. Receiver embodiments may be designed, adapted, and implemented explicitly in software or programmed hardware, or implicitly in standard RAKE-based hardware either within the RAKE (i.e., at the finger level) or outside the RAKE (i.e., at the user or subchannel symbol level). Embodiments may be employed in user equipment on the forward link or in a base station on the reverse link. It may be adapted to general signal processing applications where a signal is to be extracted from interference.
摘要翻译： 本发明教导了用于消除通过频率选择通信信道传播到多个接收天线的经编码的多址扩频传输中的小区内和小区间干扰的干扰消除接收机的细节。 通过重复使用符号估计加权，具有稳定步长的减法消除和混合判决符号估计来设计或调整接收机。 接收器实施例可以在软件或编程硬件中明确设计，适应和实现，或隐含地在RAKE（即，在手指级）或RAKE外部（即在用户或子信道符号处）内的基于标准RAKE的硬件中 水平）。 可以在前向链路上的用户设备或反向链路上的基站中采用实施例。 它可以适用于要从干扰中提取信号的一般信号处理应用。
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9.发明申请公开(公告)号：US20110149943A1
公开(公告)日：2011-06-23
申请号：US12825146
申请日：2010-06-28
CPC分类号： H04L27/2662 , H04L25/0212 , H04L27/2665
摘要： Techniques for performing time tracking in a communication system utilizing a cyclic prefix are described. In an aspect, a receiver may detect for large timing errors based on early and late received samples obtained with early and late FFT windows, respectively. The receiver may derive first and second channel impulse response (CIR) estimates based on the early and late received samples, respectively, determine an early channel energy based on the first CIR estimate, determine a late channel energy based on the second CIR estimate, compute an update amount based on the early and late channel energies, and update the FFT window position based on the update amount. In another aspect, the receiver may perform time tracking with an inner time tracking loop (TTL) and an outer TTL. The receiver may update the FFT window position in coarse steps with the outer TTL and in fine steps with the inner TTL.
摘要翻译： 描述了在利用循环前缀的通信系统中执行时间跟踪的技术。 在一方面，接收机可以分别基于早期和晚期FFT窗口获得的早期和晚期接收样本来检测大的定时误差。 接收机可以基于早期和晚期接收的采样分别导出第一和第二信道脉冲响应（CIR）估计，基于第一CIR估计确定早期信道能量，基于第二CIR估计确定后期信道能量，计算 基于早期和晚期信道能量的更新量，并且基于更新量来更新FFT窗口位置。 在另一方面，接收机可以利用内部时间跟踪环（TTL）和外部TTL来执行时间跟踪。 接收机可以以外部TTL以粗略的步骤更新FFT窗口位置，并以内部TTL进行微调。
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公开(公告)号：US08218697B2
公开(公告)日：2012-07-10
申请号：US12707507
申请日：2010-02-17
申请人： Tommy Guess , Michael L. McCloud , Louis L. Scharf
发明人： Tommy Guess , Michael L. McCloud , Louis L. Scharf
CPC分类号： H04L1/0631 , H04L1/0048 , H04L1/005 , H04L5/023 , H04L25/0328 , H04L27/2647
摘要： An OFDMA-MIMO receiver performs a recursive interference cancellation across several correlated subbands and several receive antenna elements to demodulate complex source symbols for several users that have been coded across several subbands and transmit antennas. The iterative parallel interference canceller (PIC) is configured to work in the presence of both spatial and frequency structure introduced by the transmitter space-frequency mapping and the actual frequency selective wireless channel. The interference canceller uses mixed decisions, confidence weights, and stabilizing step sizes in a PIC receiver, which may be used with a successive decoding architecture in a receiver that employs a combination of modulation level interference cancellation with successive decoding.
摘要翻译： OFDMA-MIMO接收机在几个相关子带和若干接收天线元件之间执行递归干扰消除，以解调多个已经在多个子带和发射天线上编码的用户的复数源符号。 迭代并行干扰消除器（PIC）被配置为在存在由发射机空间频率映射和实际频率选择性无线信道引入的空间和频率结构的情况下工作。 干扰消除器在PIC接收机中使用混合决策，置信权重和稳定步长，其可以与采用调制级干扰消除与连续解码的组合的接收机中的连续解码架构一起使用。
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