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1. 发明申请

US20080235311A1 SIMPLIFIED EQUALIZATION FOR CORRELATED CHANNELS IN OFDMA 有权
标题翻译： OFDMA中相关通道的简化均衡
公开(公告)号：US20080235311A1
公开(公告)日：2008-09-25
申请号：US12052248
申请日：2008-03-20
申请人： Petru Cristian Budianu , Hemanth Sampath , Alexei Gorokhov , Dhananjay A. Gore
发明人： Petru Cristian Budianu , Hemanth Sampath , Alexei Gorokhov , Dhananjay A. Gore
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。

2. 发明申请

US20120155425A1 PILOT DESIGN FOR IMPROVED CHANNEL AND INTERFERENCE ESTIMATION 有权
标题翻译：用于改进通道和干扰估计的试验设计
公开(公告)号：US20120155425A1
公开(公告)日：2012-06-21
申请号：US13402537
申请日：2012-02-22
申请人： Petru Cristian Budianu , Dhananjay A. Gore , Alexei Gorokhov
发明人： Petru Cristian Budianu , Dhananjay A. Gore , Alexei Gorokhov
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。

3. 发明授权

US08612502B2 Simplified equalization for correlated channels in OFDMA 有权
标题翻译： OFDMA中相关频道的简化均衡
公开(公告)号：US08612502B2
公开(公告)日：2013-12-17
申请号：US12052248
申请日：2008-03-20
申请人： Petru Cristian Budianu , Hermanth Sampath , Alexei Gorokhov , Dhananjay A. Gore
发明人： Petru Cristian Budianu , Hermanth Sampath , Alexei Gorokhov , Dhananjay A. Gore
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。

4. 发明授权

US08130867B2 Pilot design for improved channel and interference estimation 有权
标题翻译：用于改进通道和干扰估计的导频设计
公开(公告)号：US08130867B2
公开(公告)日：2012-03-06
申请号：US11691243
申请日：2007-03-26
申请人： Petru Cristian Budianu , Dhananjay A. Gore , Alexei Gorokhov
发明人： Petru Cristian Budianu , Dhananjay A. Gore , Alexei Gorokhov
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。

5. 发明申请

US20080232484A1 METHOD AND APPARATUS FOR IMPROVED ESTIMATION OF SELECTIVE CHANNELS IN AN OFDMA SYSTEM WITH DEDICATED PILOT TONES 有权
标题翻译：用于改进在具有专用引航权的OFDMA系统中选择性信道估计的方法和装置
公开(公告)号：US20080232484A1
公开(公告)日：2008-09-25
申请号：US11690658
申请日：2007-03-23
申请人： Petru Cristian Budianu , Alexei Gorokhov , Dhananjay A. Gore
发明人： Petru Cristian Budianu , Alexei Gorokhov , Dhananjay A. Gore
IPC分类号： H04B3/10
CPC分类号： H04L25/0228 , H04L5/0051 , H04L25/021 , H04L25/0226 , H04L25/0248 , H04L25/03866
摘要： The present disclosure provides a method and apparatus of channel estimation for a wireless communication system. Dedicated pilot symbols transmitted over at least one time-frequency region for at least one user are received. Channel parameters are estimated for the at least one time-frequency region based on the received dedicated pilot symbols.
摘要翻译：本公开提供了一种用于无线通信系统的信道估计的方法和装置。接收通过至少一个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，估计对于至少一个时间 - 频率区域的信道参数。

6. 发明申请

US20080165891A1 PILOT DESIGN FOR IMPROVED CHANNEL AND INTERFERENCE ESTIMATION 有权
标题翻译：用于改进通道和干扰估计的试验设计
公开(公告)号：US20080165891A1
公开(公告)日：2008-07-10
申请号：US11691243
申请日：2007-03-26
申请人： Petru Cristian Budianu , Dhananjay A. Gore , Alexei Gorokhov
发明人： Petru Cristian Budianu , Dhananjay A. Gore , Alexei Gorokhov
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。

7. 发明授权

US08315660B2 User power offset estimation using dedicated pilot tones for OFDMA 有权
标题翻译：使用OFDMA专用导频音的用户功率偏移估计
公开(公告)号：US08315660B2
公开(公告)日：2012-11-20
申请号：US11675055
申请日：2007-02-14
申请人： Petru Cristian Budianu , Dhananjay A. Gore , Alexei Y. Gorokhov
发明人： Petru Cristian Budianu , Dhananjay A. Gore , Alexei Y. Gorokhov
IPC分类号： H04B7/00
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。

8. 发明申请

US20080192868A1 USER POWER OFFSET ESTIMATION USING DEDICATED PILOT TONES FOR OFDMA 有权
标题翻译：用于OFDMA的专用导频音的用户功率偏移估计
公开(公告)号：US20080192868A1
公开(公告)日：2008-08-14
申请号：US11675055
申请日：2007-02-14
申请人： Petru Cristian Budianu , Alexei Gorokhov , Dhananjay Ashok Gore
发明人： Petru Cristian Budianu , Alexei Gorokhov , Dhananjay Ashok Gore
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。

9. 发明授权

US07751510B2 Simplified channel and interference estimation with dedicated pilot tones for OFDMA 有权
标题翻译：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
申请人： Petru Cristian Budianu , Dhananjay Ashok Gore , Alexei Gorokhov
发明人： Petru Cristian Budianu , Dhananjay Ashok Gore , Alexei Gorokhov
IPC分类号： H03D1/04 , H04B1/10
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。

10. 发明授权

US08792922B2 Uplink scheduling for fairness in channel estimation performance 失效
标题翻译：上行链路调度在信道估计性能方面的公平性
公开(公告)号：US08792922B2
公开(公告)日：2014-07-29
申请号：US11680233
申请日：2007-02-28
申请人： Petru Cristian Budianu , Alexei Gorokhov , Dhananjay Ashok Gore , Ravi Palanki
发明人： Petru Cristian Budianu , Alexei Gorokhov , Dhananjay Ashok Gore , Ravi Palanki
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。

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