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    Simplified equalization for correlated channels in OFDMA
    1.
    发明授权
    Simplified equalization for correlated channels in OFDMA 有权
    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。

    PILOT DESIGN FOR IMPROVED CHANNEL AND INTERFERENCE ESTIMATION
    2.
    发明申请
    PILOT DESIGN FOR IMPROVED CHANNEL AND INTERFERENCE ESTIMATION 有权
    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。

    PILOT DESIGN FOR IMPROVED CHANNEL AND INTERFERENCE ESTIMATION
    3.
    发明申请
    PILOT DESIGN FOR IMPROVED CHANNEL AND INTERFERENCE ESTIMATION 有权
    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。

    Pilot design for improved channel and interference estimation
    4.
    发明授权
    Pilot design for improved channel and interference estimation 有权
    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。

    SIMPLIFIED EQUALIZATION FOR CORRELATED CHANNELS IN OFDMA
    5.
    发明申请
    SIMPLIFIED EQUALIZATION FOR CORRELATED CHANNELS IN OFDMA 有权
    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。

    Detection of time-domain sequences sent on a shared control channel
    8.
    发明授权
    Detection of time-domain sequences sent on a shared control channel 有权
    检测在共享控制信道上发送的时域序列

    公开(公告)号：US08189719B2

    公开(公告)日：2012-05-29

    申请号：US12123807

    申请日：2008-05-20

    申请人： Gwendolyn D. Barriac ,  Dhananjay A. Gore ,  Alexei Gorokhov

    发明人： Gwendolyn D. Barriac ,  Dhananjay A. Gore ,  Alexei Gorokhov

    IPC分类号： H03D1/00

    CPC分类号： H04B1/707 ,  H04L5/0007 ,  H04L5/0016 ,  H04L5/0053

    摘要： Techniques for sending and receiving signaling messages in a control segment are described. The control segment may be sent with CDM in multiple OFDM symbols. At a receiver, a received sequence is obtained for the control segment. A time-domain signaling sequence is generated based on a signaling message hypothesized to have been sent in the control segment. A correlating sequence is generated based on the signaling sequence. In one design, the signaling sequence is partitioned into multiple sub-sequences, one sub-sequence for each symbol period in which the control segment was sent. Each sub-sequence is cyclically shifted by an amount determined by a channel tap delay. The correlating sequence is then formed by concatenating all of the cyclically shifted sub-sequences. The correlating sequence may also be generated in other manners. The received sequence is correlated with the correlating sequence to determine whether the signaling message was sent in the control segment.

    摘要翻译： 描述了在控制段中发送和接收信令消息的技术。 控制段可以用多个OFDM符号中的CDM发送。 在接收机处，获得控制段的接收序列。 基于假设已经在控制段中发送的信令消息来生成时域信令序列。 基于信令序列生成相关序列。 在一种设计中，信令序列被划分成多个子序列，其中发送控制段的每个符号周期的一个子序列。 每个子序列被循环移位由通道抽头延迟确定的量。 然后通过连接所有循环移位的子序列形成相关序列。 相关序列也可以以其他方式生成。 接收到的序列与相关序列相关，以确定信令消息是否在控制段中发送。