-
1.发明授权公开(公告)号：US08457221B2
公开(公告)日：2013-06-04
申请号：US11852250
申请日：2007-09-07
IPC分类号： H04K1/10
CPC分类号： H04L5/0053 , H04L1/1692 , H04L5/0007
摘要： Techniques for transmitting signaling with localized spreading are described. In one design, a transmitter (e.g., a base station) spreads multiple signaling symbols to obtain multiple sets of output symbols and further maps the multiple sets of output symbols to multiple time frequency blocks. The spreading may be localized to each time frequency block. Prior to the spreading, the transmitter may scale the multiple signaling symbols with multiple gains determined based on the transmit power for these signaling symbols. The transmitter may scramble the scaled signaling symbols to obtain scrambled symbols and may spread the scrambled symbols to obtain the multiple sets of output symbols. The transmitter may map each set of output symbols to a respective time frequency block.
摘要翻译： 描述了使用局部扩展发送信令的技术。 在一种设计中，发射机（例如，基站）扩展多个信令符号以获得多组输出符号，并将多组输出符号进一步映射到多个时间频率块。 扩展可以被定位到每个时间频率块。 在扩展之前，发射机可以根据这些信令符号的发射功率确定的多个增益来缩放多个信令符号。 发射机可以加密缩放的信令符号以获得加扰符号，并且可以扩展加扰符号以获得多组输出符号。 发射机可以将每组输出符号映射到相应的时间频率块。
-
公开(公告)号：US08792922B2
公开(公告)日：2014-07-29
申请号：US11680233
申请日：2007-02-28
IPC分类号： H04B15/00
CPC分类号： H04W72/1231 , H04W72/1268
摘要： Systems and methodologies are described that facilitate mitigation of interference through uplink scheduling in a wireless communication environment. Access points can assign multiple terminals to a single tile or segment of shared resource (e.g., a time frequency region) to maximize the number of terminals supported. However, combinations of certain types of terminals can cause a significant increase in interference. In particular, allocating multiple terminals having a relatively high velocity (e.g., terminals located in moving vehicles) to a single tile can cause an unacceptable increase in interference. To mitigate interference, high velocity terminals can be identified. Once identified, terminals can be allocated to the available tiles based at least in part upon avoiding combinations that result in a significant increase in interference.
摘要翻译： 描述了通过无线通信环境中的上行链路调度促进减轻干扰的系统和方法。 接入点可以将多个终端分配给单个瓦片或共享资源段（例如，时间频率区域），以最大化所支持的终端的数量。 然而，某些类型的终端的组合可能导致干扰的显着增加。 特别地，将具有较高速度的多个终端（例如，位于移动车辆中的终端）分配到单个瓦片可能导致不可接受的干扰增加。 为了减轻干扰，可以确定高速终端。 一旦被识别，终端可以至少部分地基于避免导致干扰显着增加的组合而被分配给可用的瓦片。
-
公开(公告)号：US20080205333A1
公开(公告)日：2008-08-28
申请号：US11680233
申请日：2007-02-28
IPC分类号： H04Q7/00
CPC分类号： H04W72/1231 , H04W72/1268
摘要： Systems and methodologies are described that facilitate mitigation of interference through uplink scheduling in a wireless communication environment. Access points can assign multiple terminals to a single tile or segment of shared resource (e.g., a time frequency region) to maximize the number of terminals supported. However, combinations of certain types of terminals can cause a significant increase in interference. In particular, allocating multiple terminals having a relatively high velocity (e.g., terminals located in moving vehicles) to a single tile can cause an unacceptable increase in interference. To mitigate interference, high velocity terminals can be identified. Once identified, terminals can be allocated to the available tiles based at least in part upon avoiding combinations that result in a significant increase in interference.
摘要翻译： 描述了通过无线通信环境中的上行链路调度促进减轻干扰的系统和方法。 接入点可以将多个终端分配给单个瓦片或共享资源段（例如，时间频率区域），以最大化所支持的终端的数量。 然而，某些类型的终端的组合可能导致干扰的显着增加。 特别地，将具有较高速度的多个终端（例如，位于移动车辆中的终端）分配到单个瓦片可能导致不可接受的干扰增加。 为了减轻干扰，可以确定高速终端。 一旦被识别，终端可以至少部分地基于避免导致干扰显着增加的组合而被分配给可用的瓦片。
-
公开(公告)号：US09264183B2
公开(公告)日：2016-02-16
申请号：US12446709
申请日：2007-10-24
申请人： Alexei Gorokhov , Aamod Khandekar , Naga Bhushan , Petru Christian Budianu , Ravi Palanki , Siddhartha Mallik
发明人： Alexei Gorokhov , Aamod Khandekar , Naga Bhushan , Petru Christian Budianu , Ravi Palanki , Siddhartha Mallik
CPC分类号： H04L1/1671 , H04L1/1858 , H04W76/10
摘要： Systems and methodologies are described that facilitate establishing a forward link acknowledgement channel and transmitting acknowledgment signals thereupon. In particular, the signals can be spread within contiguous channel clusters in a tile where the signals in the cluster are mutually orthogonal to one another. Additionally, the signals can be multiplexed over a plurality of frequency regions. In this regard, the acknowledgment signals are diverse with respect to frequency and interference; moreover, the signals can be received and decoded even where one of the channels experiences high interference. Furthermore, the acknowledgement signals can also communicate a channel deassignment value, which allows devices to utilize persistent channels in communicating data to one another.
摘要翻译： 描述了有助于建立前向链路确认信道并在其上发送确认信号的系统和方法。 特别地，信号可以在其中簇中的信号彼此相互正交的瓦片中的相邻信道簇内扩展。 另外，可以在多个频率区域上复用信号。 在这方面，确认信号在频率和干扰方面是不同的; 此外，即使在一个信道经受高干扰的情况下也可以接收和解码信号。 此外，确认信号还可以传送信道去分配值，这允许设备利用持久信道将数据彼此通信。
-
公开(公告)号：US20120155425A1
公开(公告)日：2012-06-21
申请号：US13402537
申请日：2012-02-22
IPC分类号： H04W72/04
CPC分类号： H04L25/0202 , H04L5/0023 , H04L5/0048
摘要： Techniques for transmitting pilot and for processing received pilot to obtain channel and interference estimates are described. A terminal may generate pilot symbols for a first cluster in a time frequency block based on a first sequence and may generate pilot symbols for a second cluster in the time frequency block based on a second sequence. The first and second sequences may include common elements arranged in different orders and may be considered as different versions of a single sequence. The terminal may transmit the pilot symbols in their respective clusters. A base station may obtain received pilot symbols from multiple clusters in the time frequency block. The base station may form each of multiple basis vectors with multiple versions of the sequence assigned to the terminal and may process the received pilot symbols with the multiple basis vectors to obtain a channel estimate for the terminal.
摘要翻译： 描述用于发送导频和处理接收导频以获得信道和干扰估计的技术。 终端可以基于第一序列在时间频率块中生成用于第一簇的导频符号，并且可以基于第二序列在时间频率块中生成用于第二簇的导频符号。 第一和第二序列可以包括以不同顺序排列的公共元素，并且可以被认为是单个序列的不同版本。 终端可以在它们各自的簇中发送导频符号。 基站可以在时间频率块中从多个簇获得接收到的导频符号。 基站可以形成分配给终端的序列的多个版本的多个基本向量中的每一个，并且可以用多个基本向量处理所接收的导频符号以获得终端的信道估计。
-
6.发明申请公开(公告)号：US20080192868A1
公开(公告)日：2008-08-14
申请号：US11675055
申请日：2007-02-14
IPC分类号： H04L27/06
CPC分类号： H04W52/34
摘要： A method of user power offset estimation for a wireless communication system is disclosed. Dedicated pilot symbols transmitted over at least one time-frequency region for a user are received. Power offset of the user is estimated based on the received dedicated pilot symbols.
摘要翻译： 公开了一种用于无线通信系统的用户功率偏移估计的方法。 接收通过用户的至少一个时间 - 频率区域发送的专用导频符号。 基于所接收的专用导频符号来估计用户的功率偏移。
-
公开(公告)号：US08612502B2
公开(公告)日：2013-12-17
申请号：US12052248
申请日：2008-03-20
IPC分类号： G06F7/38
CPC分类号： H04L5/023 , H04L25/0232 , H04L25/0244 , H04L25/03019 , H04L27/2647 , H04L2025/03414 , H04L2025/03426
摘要： Systems and methodologies are described that facilitate equalization of received signals in a wireless communication environment. Multiple transmit and/or receive antennas and utilize MIMO technology to enhance performance. A single tile of transmitted data, including a set of modulation symbols, can be received at multiple receive antennas, resulting in multiple tiles of received modulation symbols. Corresponding modulation symbols from multiple received tiles can be processed as a function of channel and interference estimates to generate a single equalized modulation symbol. Typically, the equalization process is computationally expensive. However, the channels are highly correlated. This correlation is reflected in the channel estimates and can be utilized to reduce complex equalization operations. In particular, a subset of the equalizers can be generated based upon the equalizer function and the remainder can be generated using interpolation. In addition, the equalizer function itself can be simplified.
摘要翻译： 描述了促进无线通信环境中的接收信号的均衡的系统和方法。 多个发射和/或接收天线并利用MIMO技术来提高性能。 可以在多个接收天线处接收包括一组调制符号的传输数据的单个瓦片，从而导致接收到的调制符号的多个瓦片。 来自多个接收瓦片的相应调制符号可以作为信道和干扰估计的函数来处理，以生成单个均衡调制符号。 通常，均衡过程在计算上是昂贵的。 然而，这些渠道是高度相关的。 该相关性反映在信道估计中，并且可以用于减少复数均衡操作。 特别地，可以基于均衡器功能生成均衡器的子集，并且可以使用插值来生成余数。 此外，均衡器功能本身可以简化。
-
公开(公告)号：US08130867B2
公开(公告)日：2012-03-06
申请号：US11691243
申请日：2007-03-26
IPC分类号： H04L27/00
CPC分类号： H04L25/0202 , H04L5/0023 , H04L5/0048
摘要： Techniques for transmitting pilot and for processing received pilot to obtain channel and interference estimates are described. A terminal may generate pilot symbols for a first cluster in a time frequency block based on a first sequence and may generate pilot symbols for a second cluster in the time frequency block based on a second sequence. The first and second sequences may include common elements arranged in different orders and may be considered as different versions of a single sequence. The terminal may transmit the pilot symbols in their respective clusters. A base station may obtain received pilot symbols from multiple clusters in the time frequency block. The base station may form each of multiple basis vectors with multiple versions of the sequence assigned to the terminal and may process the received pilot symbols with the multiple basis vectors to obtain a channel estimate for the terminal.
摘要翻译： 描述用于发送导频和处理接收导频以获得信道和干扰估计的技术。 终端可以基于第一序列在时间频率块中生成用于第一簇的导频符号，并且可以基于第二序列在时间频率块中生成用于第二簇的导频符号。 第一和第二序列可以包括以不同顺序排列的公共元素，并且可以被认为是单个序列的不同版本。 终端可以在它们各自的簇中发送导频符号。 基站可以在时间频率块中从多个簇获得接收到的导频符号。 基站可以形成分配给终端的序列的多个版本的多个基本向量中的每一个，并且可以用多个基本向量处理所接收的导频符号以获得终端的信道估计。
-
9.发明授权Simplified channel and interference estimation with dedicated pilot tones for OFDMA 有权用于OFDMA的专用导频音调的简化信道和干扰估计公开(公告)号：US07751510B2
公开(公告)日：2010-07-06
申请号：US11493643
申请日：2006-07-25
CPC分类号： H04L25/023 , H04B17/345 , H04L5/0007 , H04L5/0016 , H04L5/0032 , H04L5/0051 , H04L25/0204 , H04L25/021 , H04L25/0224 , H04L25/0248 , H04L25/03866 , H04L27/2647
摘要： Estimation of channel characteristics and interference level in a time-varying multi-carrier multi-user systems is carried out concurrently. To perform the estimation, a multitude of data symbols and dedicated pilot symbols are transmitted over the channel. The estimate of the interference level is used to estimate the channel parameters.
摘要翻译： 并行执行时变多载波多用户系统中的信道特性和干扰电平的估计。 为了执行估计，通过信道发送多个数据符号和专用导频符号。 干扰电平的估计用于估计信道参数。
-
公开(公告)号：US20080235311A1
公开(公告)日：2008-09-25
申请号：US12052248
申请日：2008-03-20
IPC分类号： G06F17/17
CPC分类号： H04L5/023 , H04L25/0232 , H04L25/0244 , H04L25/03019 , H04L27/2647 , H04L2025/03414 , H04L2025/03426
摘要： Systems and methodologies are described that facilitate equalization of received signals in a wireless communication environment. Multiple transmit and/or receive antennas and utilize MIMO technology to enhance performance. A single tile of transmitted data, including a set of modulation symbols, can be received at multiple receive antennas, resulting in multiple tiles of received modulation symbols. Corresponding modulation symbols from multiple received tiles can be processed as a function of channel and interference estimates to generate a single equalized modulation symbol. Typically, the equalization process is computationally expensive. However, the channels are highly correlated. This correlation is reflected in the channel estimates and can be utilized to reduce complex equalization operations. In particular, a subset of the equalizers can be generated based upon the equalizer function and the remainder can be generated using interpolation. In addition, the equalizer function itself can be simplified.
摘要翻译： 描述了促进无线通信环境中的接收信号的均衡的系统和方法。 多个发射和/或接收天线并利用MIMO技术来提高性能。 可以在多个接收天线处接收包括一组调制符号的传输数据的单个瓦片，从而导致接收到的调制符号的多个瓦片。 来自多个接收瓦片的相应调制符号可以作为信道和干扰估计的函数来处理，以生成单个均衡调制符号。 通常，均衡过程在计算上是昂贵的。 然而，这些渠道是高度相关的。 该相关性反映在信道估计中，并且可以用于减少复数均衡操作。 特别地，可以基于均衡器功能生成均衡器的子集，并且可以使用插值来生成余数。 此外，均衡器功能本身可以简化。
-
-
-
-
-
-
-
-
-
搜索结果
359 条记录 (耗时 0.028 秒)
