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公开(公告)号：US08625656B2
公开(公告)日：2014-01-07
申请号：US12717598
申请日：2010-03-04
CPC分类号： H04L25/0202 , H04B1/71072 , H04L25/0224 , H04L25/0226 , H04L25/0238
摘要： Techniques for deriving channel estimates with different channel estimation filters are described. In one scheme, a filter selection metric is determined for a signal to be recovered, a channel estimation filter is selected based on the filter selection metric, and a channel estimate is derived with the selected channel estimation filter. In another scheme, a first channel estimate is derived with a first channel estimation filter having a first filter response, a first signal is recovered with the first channel estimate, and interference due to the first signal is estimated and removed. A second channel estimate is derived with a second channel estimation filter having a second filter response that is different from the first filter response.
摘要翻译： 描述了使用不同信道估计滤波器导出信道估计的技术。 在一个方案中，为要恢复的信号确定滤波器选择度量，基于滤波器选择度量来选择信道估计滤波器，并且使用所选择的信道估计滤波器导出信道估计。 在另一方案中，利用具有第一滤波器响应的第一信道估计滤波器导出第一信道估计，用第一信道估计恢复第一信号，并且估计和去除由于第一信号引起的干扰。 使用具有与第一滤波器响应不同的第二滤波器响应的第二信道估计滤波器导出第二信道估计。
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公开(公告)号：US08615200B2
公开(公告)日：2013-12-24
申请号：US12888999
申请日：2010-09-23
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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143.发明授权Apparatus and method for receiving packet data on a subset of carrier frequencies in a wireless communication system 有权一种用于在无线通信系统中的载波频率子集上接收分组数据的装置和方法公开(公告)号：US08593981B2
公开(公告)日：2013-11-26
申请号：US12884528
申请日：2010-09-17
CPC分类号： H04L27/2647 , H04B1/713
摘要： A remote station for a wireless communication system including a base station is disclosed. The remote station includes a front end structure configured to receive packet data in parallel on a subset of carrier frequencies. Each packet data is preceded by a header field for identifying the remote station as the recipient of the packet data and the subset of carrier frequencies is based on a set of a corresponding number of multiple carrier frequencies.
摘要翻译： 公开了一种用于包括基站的无线通信系统的远程站。 远程站包括前端结构，其被配置为在载波频率的子集上并行地接收分组数据。 每个分组数据之前都有一个头部字段，用于将远程站识别为分组数据的接收者，而载波频率的子集是基于相应数量的多个载波频率的集合。
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公开(公告)号：US08493942B2
公开(公告)日：2013-07-23
申请号：US11492609
申请日：2006-07-24
IPC分类号： H04B7/216
CPC分类号： H04L25/0236 , H04B1/7107 , H04B2201/70701
摘要： Techniques for recovering transmissions on data and control channels with interference cancellation are described. A receiver derives a first interference estimate for a first channel based on a first channel estimate and cancels the first interference estimate from an input signal. The receiver thereafter derives a second interference estimate for the first channel based on a second channel estimate and cancels the second interference estimate in place of the first interference estimate from the input signal. The receiver may derive the first channel estimate based on pilot symbols and may derive the second channel estimate based on a correctly decoded packet. The second channel estimate may be of higher quality than the first channel estimate.
摘要翻译： 描述了用于在具有干扰消除的数据和控制信道上恢复传输的技术。 接收机基于第一信道估计导出第一信道的第一干扰估计，并从输入信号中消除第一干扰估计。 接收机此后基于第二信道估计得出第一信道的第二干扰估计，并且从输入信号中取代第二干扰估计代替第一干扰估计。 接收机可以基于导频符号导出第一信道估计，并且可以基于正确解码的分组导出第二信道估计。 第二信道估计可以具有比第一信道估计更高的质量。
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公开(公告)号：US08493873B2
公开(公告)日：2013-07-23
申请号：US12141000
申请日：2008-06-17
申请人： Durga Prasad Malladi
发明人： Durga Prasad Malladi
IPC分类号： G01R31/08
CPC分类号： H04L5/0019 , H04L1/0028 , H04L1/165 , H04L5/0051
摘要： A resource block can include all symbols in a slot for each, generally a multiple of 12, sub-carrier in the resource block. A slot is typically 0.5 milliseconds (ms) and includes 7 symbols for short cyclic prefix (CP) and 6 symbols for long CP. The resource block can include a SRS channel as well as other channels such as an acknowledgement (ACK) channel and a channel quality indication (CQI) channel. Although defined as a separate physical channel the SRS can be multiplex with uplink channels. In accordance therewith, an SRS can be detected in a slot of a 1.0 ms sub-frame constituting two slots, typically one slot but not the other including the SRS. The structure of the slot can be modified to facilitate the multiplexing by, e.g., replacing an existing symbol with the SRS, and a length and a type of a time domain orthogonal spreading code can be determined for each slot as a function of SRS presence.
摘要翻译： 资源块可以包括在资源块中的每个，通常为12个子载波的倍数的时隙中的所有符号。 一个时隙通常为0.5毫秒（ms），包括短循环前缀（CP）的7个符号和长CP的6个符号。 资源块可以包括SRS信道以及诸如确认（ACK）信道和信道质量指示（CQI）信道的其他信道。 虽然定义为单独的物理信道，但SRS可以与上行链路信道进行复用。 根据此，可以在构成两个时隙（通常为一个时隙但不包括SRS的另一个时隙）的1.0ms子帧的时隙中检测SRS。 可以修改时隙的结构以通过例如用SRS替换现有符号来促进复用，并且可以根据SRS存在来确定每个时隙的时域正交扩展码的长度和类型。
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146.发明授权Multi-carrier incremental redundancy for packet-based wireless communications 失效用于基于分组的无线通信的多载波增量冗余公开(公告)号：US08488710B2
公开(公告)日：2013-07-16
申请号：US13072964
申请日：2011-03-28
CPC分类号： H04L5/0055 , H04L1/0045 , H04L1/04 , H04L1/08 , H04L1/1819 , H04L1/1845 , H04L1/1893 , H04L5/0053 , H04L5/06 , H04L27/18
摘要： In a particular embodiment, a method of providing redundancy for error recovery in multi-carrier wireless communications includes transmitting a primary version of information via a first carrier, transmitting a first portion of a redundancy version of the information via a second carrier, and transmitting a second portion of the redundancy version of the information via a third carrier. The primary version is encoded using a first encoding scheme and the redundancy version is encoded using a second encoding scheme. The primary version, the first portion, and the second portion are transmitted substantially simultaneously.
摘要翻译： 在特定实施例中，提供用于多载波无线通信中的错误恢复的冗余的方法包括：经由第一载波发送信息的主要版本，经由第二载波发送信息的冗余版本的第一部分，以及发送 通过第三载体的信息的冗余版本的第二部分。 使用第一编码方案对主版本进行编码，并且使用第二编码方案对冗余版本进行编码。 主要版本，第一部分和第二部分基本上同时传输。
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公开(公告)号：US08472456B2
公开(公告)日：2013-06-25
申请号：US12142368
申请日：2008-06-19
CPC分类号： H04W72/1247 , H04L47/14 , H04L47/2433 , H04L47/50 , H04L47/626 , H04W52/12
摘要： Method and apparatus for a channel sensitive scheduler for scheduling transmissions in a communication system. The scheduler is defined by a priority function of the channel condition as determined by amount of transmission power needed by a mobile station. In one embodiment the channel condition is determined based on the transmission pilot power of each mobile station and is used to calculate a priority value for each mobile station. The mobile stations are then scheduled to transmit based on the priority value.
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公开(公告)号：US08437380B2
公开(公告)日：2013-05-07
申请号：US12902992
申请日：2010-10-12
CPC分类号： H04L25/0202 , H04B1/71072 , H04L25/0224 , H04L25/0226 , H04L25/0238
摘要： Techniques for deriving channel estimates with different channel estimation filters are described. In one scheme, a filter selection metric is determined for a signal to be recovered, a channel estimation filter is selected based on the filter selection metric, and a channel estimate is derived with the selected channel estimation filter. In another scheme, a first channel estimate is derived with a first channel estimation filter having a first filter response, a first signal is recovered with the first channel estimate, and interference due to the first signal is estimated and removed. A second channel estimate is derived with a second channel estimation filter having a second filter response that is different from the first filter response.
摘要翻译： 描述了使用不同信道估计滤波器导出信道估计的技术。 在一个方案中，为要恢复的信号确定滤波器选择度量，基于滤波器选择度量来选择信道估计滤波器，并且使用所选择的信道估计滤波器导出信道估计。 在另一方案中，利用具有第一滤波器响应的第一信道估计滤波器导出第一信道估计，用第一信道估计恢复第一信号，并且估计和去除由于第一信号引起的干扰。 使用具有与第一滤波器响应不同的第二滤波器响应的第二信道估计滤波器导出第二信道估计。
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149.发明申请公开(公告)号：US20130039236A1
公开(公告)日：2013-02-14
申请号：US13561915
申请日：2012-07-30
申请人： Durga Prasad Malladi
发明人： Durga Prasad Malladi
IPC分类号： H04B1/18
CPC分类号： H04L27/2604 , H04L5/023 , H04L27/183 , H04L27/3488
摘要： System(s) and method(s) are provided to transmit simultaneously a first and a second communication channel in a single-carrier waveform format with disparate error rate requirements. First channel and second channel are coded individually to form an alphabet for a first and second constellation. Prior to transmission, bits of information of the first and second channels are modulated with a hierarchical modulation constellation is generated through a combination of a first a second constellation; each constellation is assigned a configurable weight (e.g., a “hierarchic weight”) that is expressed in terms of a configurable energy ratio. The energy ratio determines the resilience of bits associated with the first and second channel. Bit mapping within the first and second constellation provides redundancy to mitigate error rate within each quadrant of the hierarchical constellation. Hierarchical modulation of more than two channels can be accomplished through the same principal of individual coding and constellation composition.
摘要翻译： 提供了系统和方法，以不同的错误率要求以单载波波形格式同时传输第一和第二通信信道。 第一通道和第二通道被分别编码以形成用于第一和第二星座的字母表。 在发送之前，通过第一和第二星座的组合产生分层调制星座来调制第一和第二信道的信息比特; 每个星座被分配以可配置能量比表示的可配置权重（例如，分级权重）。 能量比确定与第一和第二通道相关联的位的弹性。 第一和第二星座内的比特映射提供冗余以减轻分层星座的每个象限内的错误率。 可以通过相同的个体编码和星座组成原理来实现多于两个信道的分层调制。
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150.发明授权Frequency selective and frequency diversity transmissions in a wireless communication system 有权无线通信系统中的频率选择和频率分集传输公开(公告)号：US08369424B2
公开(公告)日：2013-02-05
申请号：US11777885
申请日：2007-07-13
申请人： Durga Prasad Malladi
发明人： Durga Prasad Malladi
CPC分类号： H04W72/0453 , H04B1/7143 , H04L5/0007 , H04L5/0037 , H04L5/0062 , H04W72/06
摘要： Techniques for efficiently supporting frequency selective scheduling (FSS) and frequency diversity scheduling (FDS) are described. In one design, a first transmission for an FSS user may be mapped to a subband selected for this user from among at least one subband in a first frequency region of the system bandwidth. The first transmission may be mapped to a fixed portion or different portions of the selected subband in different time intervals. A second transmission for an FDS user may be mapped across multiple subbands in a second frequency region of the system bandwidth. The second transmission may be mapped to different subbands or different resource blocks in the second frequency region in different time intervals. Each time interval may correspond to a symbol period, a slot, a subframe, etc. The frequency hopping may be performed based on a fixed hopping pattern or a pseudo-random hopping pattern.
摘要翻译： 描述了有效支持频率选择调度（FSS）和频率分集调度（FDS）的技术。 在一种设计中，用于FSS用户的第一传输可以被映射到在系统带宽的第一频率区域中的至少一个子带中为该用户选择的子带。 可以以不同的时间间隔将第一传输映射到所选子带的固定部分或不同部分。 用于FDS用户的第二传输可以被映射在系统带宽的第二频率区域中的多个子带上。 第二传输可以以不同的时间间隔映射到第二频率区域中的不同子带或不同的资源块。 每个时间间隔可以对应于符号周期，时隙，子帧等。跳频可以基于固定跳频模式或伪随机跳频模式来执行。
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