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公开(公告)号：US20090054093A1
公开(公告)日：2009-02-26
申请号：US12190386
申请日：2008-08-12
IPC分类号： H04B7/00
CPC分类号： H04L25/0208 , H04B7/061 , H04L1/0026 , H04L1/0693 , H04L25/0224
摘要： Systems and methodologies are described that facilitate employing downlink precoding based on uplink sounding channel measurement and channel reciprocity in time division duplex or time division multiplex systems. In particular, mechanism are provided that enable downlink precoding in situations where user equipment antenna configuration includes an unequal number of transmit chains and receive chains. A mobile device transmits modulated sounding reference signals on each antenna during a calibration stage. The mobile device then transmits non-modulated sounding reference signals during a normal mode. A base station utilizes the modulated and non-modulated sounding reference signals to restore a downlink channel estimate employed in downlink precoding.
摘要翻译： 描述了有助于在时分双工或时分复用系统中基于上行链路探测信道测量和信道互易性采用下行链路预编码的系统和方法。 特别地，提供了在用户设备天线配置包括不等数量的发射链和接收链的情况下实现下行链路预编码的机制。 移动设备在校准阶段期间在每个天线上发送调制的探测参考信号。 移动设备然后在正常模式期间发送未调制的探测参考信号。 基站利用调制和未调制的探测参考信号来恢复在下行链路预编码中采用的下行链路信道估计。
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公开(公告)号：US07493132B2
公开(公告)日：2009-02-17
申请号：US10367498
申请日：2003-02-14
IPC分类号： H04B7/00
CPC分类号： H04W28/22 , H04L1/0002 , H04L1/0034 , H04L1/1809 , H04L1/1816 , H04L1/203 , H04W52/146 , H04W52/26 , H04W52/40
摘要： Techniques are provided herein to mitigate the effects of link imbalance for the uplink between a terminal (or UE) and multiple base stations (or Node Bs). An uplink transmission rate is selected based on an adjusted nominal uplink transmission rate and the difference between power control commands from different nodes.
摘要翻译： 本文提供了技术来减轻终端（或UE）和多个基站（或节点B）之间的上行链路的链路不平衡的影响。 基于经调整的标称上行传输速率和来自不同节点的功率控制命令之间的差异来选择上行传输速率。
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公开(公告)号：US20090016459A1
公开(公告)日：2009-01-15
申请号：US12027972
申请日：2008-02-07
CPC分类号： H04W28/18 , H04L1/001 , H04L1/0033 , H04L1/0072 , H04L1/0079 , H04L1/06 , H04L5/0007 , H04L27/2601
摘要： Systems, methodologies, and devices are described that can facilitate bandwidth efficient non-coherent signaling for uplink control channel transmissions. A communication device (e.g., a mobile device, base station) can be configured to utilize or generate a set of complex orthogonal codewords to facilitate transmission of control channel information using non-coherent signaling in a bandwidth efficient manner. A complex orthogonal codeword set can comprise a first subset of codewords where such codewords have a desirable cross-correlation property and another subset(s) of codewords that can include expurgated codewords, where the expurgated codewords can include discarded codewords and/or codeword pairs that produce a worst-case cross-correlation property. The codeword set and subsets are determined based at least in part on a predefined codeword criterion. A portion of the discarded codewords can be used for other purposes, such as erasure decoding, interference-level estimation, and/or multi-mode control channel operation.
摘要翻译： 描述了可以促进用于上行链路控制信道传输的带宽有效的非相干信令的系统，方法和设备。 通信设备（例如，移动设备，基站）可以被配置为利用或生成一组复杂的正交码字，以便以带宽有效的方式使用非相干信令来传输控制信道信息。 复数正交码字集合可以包括这样的码字的第一子集，其中这些码字具有期望的互相关属性，并且另一个码字子集可以包括被排除的码字，其中被排除的码字可以包括丢弃的码字和/或码字对， 产生最坏情况的互相关属性。 至少部分地基于预定义的码字标准来确定码字集合和子集。 丢弃的码字的一部分可以用于其它目的，例如擦除解码，干扰电平估计和/或多模式控制信道操作。
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公开(公告)号：US20080316977A1
公开(公告)日：2008-12-25
申请号：US12145012
申请日：2008-06-24
申请人： Durga Prasad Malladi
发明人： Durga Prasad Malladi
IPC分类号： H04B7/216
CPC分类号： H04L1/0071 , H04L1/0041 , H04L1/0052 , H04L1/04
摘要： Systems and methodologies are described that facilitate employing a hybrid transmission structure in a wireless communication environment. Each transport block (e.g., MAC PDU) can be split into multiple code blocks. Moreover, each of the code blocks can be further divided into two or more code block segments. Further, code block segments from a given code block can be transmitted over a channel during disparate time slots of a subframe. Also, within a given subframe, code block segments corresponding to differing code blocks can be transmitted sequentially in time. Utilization of the foregoing can enable employment of a pipelined decoder structure at a receiver while allowing for optimization of time/frequency diversity.
摘要翻译： 描述了有助于在无线通信环境中采用混合传输结构的系统和方法。 每个传输块（例如，MAC PDU）可被分成多个码块。 此外，每个代码块可以进一步分为两个或更多个代码块段。 此外，来自给定代码块的代码块段可以在子帧的不同时隙期间通过信道发送。 此外，在给定子帧中，可以及时地顺序地发送与不同码块对应的码块段。 利用前述可以使得能够在接收机处采用流水线解码器结构，同时允许优化时间/频率分集。
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公开(公告)号：US20080279170A1
公开(公告)日：2008-11-13
申请号：US12116081
申请日：2008-05-06
申请人： Durga Prasad Malladi , Hao Xu , Zhifei Fan
发明人： Durga Prasad Malladi , Hao Xu , Zhifei Fan
CPC分类号： H04L5/0051 , H04L5/0017 , H04L5/0039 , H04L5/0041
摘要： Techniques for sending control information in a wireless communication system are described. In an aspect, a user equipment (UE) may send data for control information in a resource block with frequency division multiplexing (FDM) and may send pilot in the resource block with frequency-domain code division multiplexing (CDM). The UE may determine multiple groups of subcarriers to use to send data in multiple symbol periods of the resource block based on a predetermined pattern or a pseudo-random hopping pattern. Each group may include consecutive subcarriers to support localized FDM. The multiple groups may include different subcarriers to provide frequency diversity and possibly interference averaging. The UE may send modulation symbols for data (e.g., in the time domain) on the multiple groups of subcarriers in the multiple symbol periods. The UE may send a reference signal sequence for pilot on multiple subcarriers in each symbol period for pilot.
摘要翻译： 描述用于在无线通信系统中发送控制信息的技术。 一方面，用户设备（UE）可以通过频分复用（FDM）在资源块中发送用于控制信息的数据，并且可以使用频域码分复用（CDM）在资源块中发送导频。 UE可以基于预定模式或伪随机跳频模式来确定用于在资源块的多个符号周期中发送数据的多个子载波组。 每个组可以包括连续的子载波以支持本地化的FDM。 多个组可以包括不同的子载波以提供频率分集和可能的干扰平均。 UE可以在多个符号周期中的多个子载波组上发送用于数据（例如，在时域中）的调制符号。 UE可以在用于导频的每个符号周期中在多个子载波上发送用于导频的参考信号序列。
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86.发明申请公开(公告)号：US20080267317A1
公开(公告)日：2008-10-30
申请号：US11971801
申请日：2008-01-09
申请人： Durga Prasad Malladi
发明人： Durga Prasad Malladi
CPC分类号： H04L27/2607 , H04L5/0007 , H04L5/0048 , H04L5/0058
摘要： Systems and methodologies are described that facilitate multiplexing unicast reference symbols and multicast transmissions in the same transmission time interval. In particular, mechanisms are provided that enable multiplexing unicast reference symbols to single frequency network transmissions that utilize a longer cyclic prefix duration. Unicast reference symbols are sent in a first symbol of a slot containing both unicast and single frequency network transmissions. The frequency utilized for the unicast reference symbols is staggered between the first symbol and a subsequent symbol in a sub-frame.
摘要翻译： 描述了在同一传输时间间隔内有助于复用单播参考符号和多播传输的系统和方法。 特别地，提供了使单播参考符号复用到利用较长循环前缀持续时间的单频网络传输的机制。 单播参考符号在包含单播和单频网络传输的时隙的第一符号中发送。 用于单播参考符号的频率在子帧中的第一符号和后续符号之间交错。
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公开(公告)号：US20080225993A1
公开(公告)日：2008-09-18
申请号：US12045501
申请日：2008-03-10
申请人： Durga Prasad Malladi , Dung N. DOAN
发明人： Durga Prasad Malladi , Dung N. DOAN
CPC分类号： H04L5/005 , H04B2201/70701 , H04L5/0007 , H04L5/0051 , H04L25/0224
摘要： Systems and methodologies are described that facilitate employing a hybrid pilot configuration in a wireless communications network. A hybrid pilot configuration includes common pilot symbols and dedicated pilots multiplexed together within a time transmission interval. The multiplexed pilot symbols can be received and utilized to demodulate channels. Common pilot symbols can be employed to demodulate control channels and dedicated pilot symbols can be utilized to demodulate data channels. Moreover, the dedicated pilot symbols can be employed to generate a channel estimate. The common pilot channels can be utilized in combination with the dedicated pilot symbols to augment the channel estimate.
摘要翻译： 描述了有助于在无线通信网络中采用混合导频配置的系统和方法。 混合导频配置包括在时间传输间隔内多路复用在一起的公共导频符号和专用导频。 多路复用导频符号可被接收并用于解调信道。 可以采用公共导频符号来解调控制信道，并且可以使用专用导频符号来解调数据信道。 此外，可以采用专用导频符号来产生信道估计。 公共导频信道可以与专用导频符号结合使用，以增加信道估计。
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公开(公告)号：US20080132281A1
公开(公告)日：2008-06-05
申请号：US11841578
申请日：2007-08-20
CPC分类号： H04B7/0686 , H04B7/0413 , H04B7/0465 , H04B7/063 , H04B7/0632 , H04B7/0634 , H04B7/0874 , H04B17/24 , H04B17/336 , H04W72/1231
摘要： An apparatus and method to dynamically schedule user devices in a wireless communication system in single-user multiple-input multiple-output (SU-MIMO) or multiple-user multiple-input multiple-output (MU-MIMO) modes of operation. The dynamic scheduling employs an efficient differential reporting of channel state information that reduces uplink feedback overhead, whereby a base layer value of a channel quality indicator (CQI) is reported in conjunction with a CQI offset value. Antenna subset selection is also reported. The offset value reflects gains by detection with successive interference cancellation if multiple antennas are reported (rank>1), while it reflects the actual offset between single-layer SU-MIMO CQI and MU-MIMO CQI if a single antenna is reported. Scheduled SU-MIMO mode of operation is optimized for a user reporting either a single antenna or multiple antennas, whereas MU-MIMO operation is optimized for a user reporting a single antenna.
摘要翻译： 一种在单用户多输入多输出（SU-MIMO）或多用户多输入多输出（MU-MIMO）操作模式中的无线通信系统中动态调度用户设备的装置和方法。 动态调度使用减少上行链路反馈开销的信道状态信息的有效差分报告，由此结合CQI偏移值报告信道质量指示符（CQI）的基本层值。 天线子集选择也被报道。 如果报告多个天线（秩> 1），则偏移值反映通过连续干扰消除的检测的增益，而如果报告单个天线，其反映单层SU-MIMO CQI与MU-MIMO CQI之间的实际偏移。 为报告单个天线或多个天线的用户优化了调度的SU-MIMO操作模式，而针对报告单个天线的用户优化了MU-MIMO操作。
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公开(公告)号：US20070254679A1
公开(公告)日：2007-11-01
申请号：US11681156
申请日：2007-03-01
申请人： Juan Montojo , Durga Prasad Malladi
发明人： Juan Montojo , Durga Prasad Malladi
IPC分类号： H04Q7/20
CPC分类号： H04L5/0091 , H04L5/0007 , H04L5/0053 , H04L5/006 , H04L5/0064 , H04L25/03866 , H04W68/025
摘要： Techniques for paging user equipments (UEs) in a wireless communication system are described. In one aspect, a cell sends a paging indicator to a UE, monitors for an acknowledgement from the UE, and sends a page message to the UE if an acknowledgement is received from the UE. The cell may receive channel quality information from the UE and may send the page message with link adaptation and/or HARQ to improve performance. In another aspect, a cell sends a paging indicator on a shared control channel to a UE and sends a page message on a shared data channel to the UE. The paging indicator and page message may be sent from multiple cells to the UE. Alternatively, the paging indicator may be sent from multiple cells to the UE, and the page message may be sent from a single cell to the UE.
摘要翻译： 描述了无线通信系统中的寻呼用户设备（UE）的技术。 一方面，小区向UE发送寻呼指示符，监视来自UE的确认，并且如果从UE接收到确认，则向UE发送寻呼消息。 小区可以从UE接收信道质量信息，并且可以发送具有链路适配和/或HARQ的寻呼消息以提高性能。 另一方面，小区在共享控制信道上发送寻呼指示符给UE，并在共享数据信道上向UE发送寻呼消息。 寻呼指示符和寻呼消息可以从多个小区发送到UE。 或者，寻呼指示符可以从多个小区发送到UE，并且寻呼消息可以从单个小区发送到UE。
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公开(公告)号：US07257377B2
公开(公告)日：2007-08-14
申请号：US10368765
申请日：2003-02-18
申请人： Durga Prasad Malladi , Josef Blanz , Yongbin Wei
发明人： Durga Prasad Malladi , Josef Blanz , Yongbin Wei
CPC分类号： H04L25/0242
摘要： A method for improving channel estimation in a wireless communication system is disclosed. A wireless signal that includes a plurality of multipath components is received. N channel estimates are then obtained, where N is any positive integer greater than one. Each channel estimate of the N channel estimates corresponds to a different multipath component of the plurality of multipath components. The effects of interference between the plurality of multipath components on the N channel estimates is then reduced.
摘要翻译： 公开了一种在无线通信系统中改善信道估计的方法。 接收包括多个多径分量的无线信号。 然后获得N个信道估计，其中N是大于1的任何正整数。 N信道估计的每个信道估计对应于多个多径分量的不同的多径分量。 然后减少在N个信道估计上的多个多径分量之间的干扰的影响。
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