公开(公告)号：US20070237067A9

公开(公告)日：2007-10-11

申请号：US10744351

申请日：2003-12-22

申请人： Mohammad Borran ,  Prabodh Varshney ,  Hannu Vilpponen ,  Panayiotis Papadimitriou

发明人： Mohammad Borran ,  Prabodh Varshney ,  Hannu Vilpponen ,  Panayiotis Papadimitriou

IPC分类号： H04J11/00

CPC分类号： H04L25/03834 ,  H04L5/026 ,  H04L25/0204 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0246 ,  H04L25/025 ,  H04L27/2602 ,  H04L27/2644 ,  H04L27/265

摘要： A apparatus and method for improved performance in radio telecommunications systems, and in particular multi-carrier code division multiple access (MC-CDMA) networks that employ pulse-shaping filters on the transmit side of a radio link. In order to more accurately transmit a radio signal bearing a symbol sequence, the modulated and spread information stream is upsampled using a technique that involves inserting zeros in the frequency domain. A corresponding downsampling procedure on the receive side permits reconstruction of the transmitted symbols. A new channel estimation algorithm may also be used, and the improved channel estimation advantageously employed to obtain more faithful symbol detection.

摘要翻译： 一种在无线电电信系统中改进性能的装置和方法，特别是在无线电链路的发射侧使用脉冲整形滤波器的多载波码分多址（MC-CDMA）网络。 为了更准确地发送携带符号序列的无线电信号，使用涉及在频域中插入零的技术对经调制和扩展的信息流进行上采样。 在接收侧的相应的下采样过程允许重传发送的符号。 还可以使用新的信道估计算法，并且有利地采用改进的信道估计来获得更忠实的符号检测。

公开(公告)号：US20050018598A1

公开(公告)日：2005-01-27

申请号：US10744351

申请日：2003-12-22

申请人： Mohammad Borran ,  Prabodh Varshney ,  Hannu Vilpponen ,  Panayiotis Papadimitriou

发明人： Mohammad Borran ,  Prabodh Varshney ,  Hannu Vilpponen ,  Panayiotis Papadimitriou

IPC分类号： H04J11/00 ,  H04L5/02 ,  H04L25/02 ,  H04L25/03 ,  H04L27/26

CPC分类号： H04L25/03834 ,  H04L5/026 ,  H04L25/0204 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224 ,  H04L25/0246 ,  H04L25/025 ,  H04L27/2602 ,  H04L27/2644 ,  H04L27/265

摘要： A apparatus and method for improved performance in radio telecommunications systems, and in particular multi-carrier code division multiple access (MC-CDMA) networks that employ pulse-shaping filters on the transmit side of a radio link. In order to more accurately transmit a radio signal bearing a symbol sequence, the modulated and spread information stream is upsampled using a technique that involves inserting zeros in the frequency domain. A corresponding downsampling procedure on the receive side permits reconstruction of the transmitted symbols. A new channel estimation algorithm may also be used, and the improved channel estimation advantageously employed to obtain more faithful symbol detection.

摘要翻译： 一种在无线电电信系统中改进性能的装置和方法，特别是在无线电链路的发射侧使用脉冲整形滤波器的多载波码分多址（MC-CDMA）网络。 为了更准确地发送携带符号序列的无线电信号，使用涉及在频域中插入零的技术对经调制和扩展的信息流进行上采样。 在接收侧的相应的下采样过程允许重传发送的符号。 还可以使用新的信道估计算法，并且有利地采用改进的信道估计来获得更忠实的符号检测。

公开(公告)号：US20060107161A1

公开(公告)日：2006-05-18

申请号：US10971681

申请日：2004-10-21

申请人： Prabodh Varshney ,  Mohammad Borran

发明人： Prabodh Varshney ,  Mohammad Borran

IPC分类号： H04L1/00 ,  H03M13/00 ,  G08C25/00 ,  G06F11/00 ,  G06F11/30

CPC分类号： H03M13/2707 ,  H03M13/098 ,  H03M13/1102 ,  H03M13/1111 ,  H03M13/1148 ,  H03M13/1185 ,  H03M13/2903 ,  H03M13/2906 ,  H03M13/296 ,  H03M13/3905 ,  H03M13/6306 ,  H03M13/6362

摘要： A generalized zigzag code is described where the code segments (each including one parity bit and information bits) of a block are not necessarily of uniform length. For coding rates in which the average code segment length is not an integer, all code segment lengths may be identical. The number of code segments depends on the coding rate and number of information bits in a block. At the encoder, parity bits are added to each string of information bits in a block to yield the code segments. For a punctured code, concatenated or not, the encoder may remove or not generate the punctured parity bits. At a decoder that operates at a rate different from the code rate of a received block, null parity bits are inserted. The received block has a number of code segments. The decoder increases the number of code segments by the addition of null parity bits, thereby reducing the coding rate to the rate of the decoder. Methods and apparatuses are detailed.

摘要翻译： 描述了广义的之字形代码，其中块的代码段（每个包括一个奇偶校验位和信息位）不一定具有均匀的长度。 对于平均代码段长度不是整数的编码速率，所有代码段长度可以相同。 代码段的数量取决于块中的编码率和信息位的数量。 在编码器处，奇偶校验位被添加到块中的每个信息比特串，以产生代码段。 对于打孔代码，连接或不连接，编码器可以去除或不产生穿孔奇偶校验位。 在以与接收块的码率不同的速率操作的解码器处，插入空奇偶校验位。 接收的块具有多个代码段。 解码器通过添加空奇偶校验位来增加代码段的数量，从而将编码率降低到解码器的速率。 方法和装置详细。

公开(公告)号：US20050094740A1

公开(公告)日：2005-05-05

申请号：US10699386

申请日：2003-10-31

申请人： Mohammad Borran ,  Prabodh Varshney ,  Jorma Lilleberg

发明人： Mohammad Borran ,  Prabodh Varshney ,  Jorma Lilleberg

IPC分类号： H04K1/10 ,  H04L20060101

CPC分类号： H04L27/34 ,  H04L1/0625 ,  H04L1/0631 ,  H04L1/0656

摘要： A multi-level space time signal constellation that is optimized for use with a multi-carrier, multi-path communication scheme includes points on a first level separated from points on a mutually exclusive second level by a minimum distance that is based on a conditional probability distribution, preferably a Kullback-Leibler (KL) distance. Points within one level may be separated by a Euclidean distance, but spherical levels are rotated relative to one another to maximize a minimum inter-level KL distance. A receiver uses pilot symbols to estimate the channels and two-stage symbol detection, determining in one stage the constellation level and in another stage the point in the level. The receiver calculates a likelihood function based on a conditional distribution which does not reduce to the Euclidean-based nearest-neighbor detector. A single stored constellation may be scaled based on received signal to noise ratio. Each constellation defines n=2M real dimensions, wherein M is the number of transmit antennas.

摘要翻译： 优化用于多载波多路径通信方案的多级时空信号星座包括在相互排斥的第二级别上的点之间的第一级上的点与基于条件概率的最小距离的点 分布，最好是Kullback-Leibler（KL）距离。 一个级别内的点可以通过欧几里德距离分开，但是球面水平相对于彼此旋转以使最小跨越距离KL距离最大化。 接收机使用导频符号来估计信道和两级符号检测，在一个阶段中确定星座级别，在另一级中确定该级别中的点。 接收机基于不减少到基于欧几里德的最近邻检测器的条件分布来计算似然函数。 可以基于接收到的信噪比来缩放单个存储的星座。 每个星座定义n = 2M个实际维度，其中M是发射天线的数量。

公开(公告)号：US20060193391A1

公开(公告)日：2006-08-31

申请号：US11285590

申请日：2005-11-21

申请人： Mohammad Borran ,  Behnaam Aazhang ,  Prabodh Varshney

发明人： Mohammad Borran ,  Behnaam Aazhang ,  Prabodh Varshney

IPC分类号： H04K1/10

CPC分类号： H04L1/1845 ,  H04L1/0026 ,  H04L1/1803 ,  H04L1/1893 ,  H04L27/2601

摘要： A first data symbol that includes a kth data bit is received over a multicarrier system. A first channel quality parameter is estimated for the first data symbol. A second data symbol that includes a retransmitted kth data bit is received. A second channel quality parameter for the second data symbol is estimated. A probable value of the kth data bit is determined based on both the first channel quality parameter and the second channel quality parameter. In response to an ARQ for data symbols communicated over a multicarrier system, the following are performed: determining channel quality parameters, each of the channel quality parameters corresponding to at least one of the transmitted data symbols; selecting a subset of the channel quality parameters exhibiting a worst quality; constructing a block of data symbols corresponding to the subset; and communicating the block of data symbols over a plurality of subcarriers.

摘要翻译： 通过多载波系统接收包括第k个第数据位的第一数据符号。 对于第一数据符号估计第一信道质量参数。 包含重传的第k个第数据位的第二数据符号被接收。 估计第二数据符号的第二信道质量参数。 基于第一信道质量参数和第二信道质量参数来确定第k个数据比特的可能值。 响应于通过多载波系统传送的数据符号的ARQ，执行以下操作：确定信道质量参数，每个信道质量参数对应于所发送的数据符号中的至少一个; 选择显示最差质量的信道质量参数的子集; 构造对应于该子集的数据符号块; 以及在多个子载波上传送数据符号块。

公开(公告)号：US20080019314A1

公开(公告)日：2008-01-24

申请号：US11761798

申请日：2007-06-12

申请人： Alexei Gorokhov ,  Aamod Khandekar ,  Tamer Kadous ,  Mohammad Borran ,  Rajat Prakash

发明人： Alexei Gorokhov ,  Aamod Khandekar ,  Tamer Kadous ,  Mohammad Borran ,  Rajat Prakash

IPC分类号： H04Q7/00

CPC分类号： H04L5/0016 ,  H04B1/7075 ,  H04L5/0026 ,  H04L5/0053 ,  H04L25/0226 ,  H04L25/03866 ,  H04L27/2613 ,  H04L27/2657

摘要： Techniques to transmit pilot on a CDMA segment on the reverse link in a wireless communication system are described. A terminal generates a scrambling sequence based on its pilot information. The pilot information may be used for the entire duration of a call by the terminal and for all sectors with which the terminal communicates during the call. The terminal generates pilot symbols based on the scrambling sequence, maps the pilot symbols to the CDMA segment, generates OFDM symbols with the mapped pilot symbols, and sends the OFDM symbols to one or more sectors. A base station processes received OFDM symbols to obtain received symbols for the CDMA segment. The base station generates the scrambling sequence based on the pilot information for the terminal and processes the received symbols with the scrambling sequence to obtain at least one parameter (e.g., received signal strength) for the terminal.

摘要翻译： 描述了在无线通信系统中在反向链路上的CDMA分段上发送导频的技术。 终端根据其导频信息产生加扰序列。 导频信息可以用于终端和呼叫期间终端通信的所有扇区的呼叫的整个持续时间。 终端基于加扰序列生成导频符号，将导频符号映射到CDMA分段，用映射的导频符号生成OFDM符号，并将OFDM符号发送到一个或多个扇区。 基站处理接收到的OFDM符号以获得CDMA段的接收符号。 基站根据终端的导频信息生成加扰序列，并用加扰序列处理接收到的符号，以获得终端的至少一个参数（例如，接收信号强度）。

公开(公告)号：US20110255522A9

公开(公告)日：2011-10-20

申请号：US11768135

申请日：2007-06-25

申请人： Alexei Gorokhov ,  Aamod Khandekar ,  Mohammad Borran ,  Rajat Prakash

发明人： Alexei Gorokhov ,  Aamod Khandekar ,  Mohammad Borran ,  Rajat Prakash

IPC分类号： H04Q7/24

CPC分类号： H04L1/0045 ,  H04L1/0061 ,  H04L1/0072 ,  H04L1/0078

摘要： Various methods and systems receiving information from an access point over a wireless link in order to reduce processing and/or transmission overhead are disclosed. Such methods and systems may include the processing of a received packet using a descrambling operation on at least a portion of the packet's information based on a MAC-ID associated with an access terminal to produce at least a first processed packet, and determining whether the received packet is targeted to the access terminal based on the first processed packet.

摘要翻译： 公开了通过无线链路从接入点接收信息以减少处理和/或传输开销的各种方法和系统。 这样的方法和系统可以包括基于与接入终端相关联的MAC-ID，使用对分组信息的至少一部分的解扰操作来处理接收到的分组，以产生至少第一处理分组，以及确定是否接收到 分组基于第一处理分组被定向到接入终端。

公开(公告)号：US20070197254A1

公开(公告)日：2007-08-23

申请号：US11620033

申请日：2007-01-04

申请人： Mohammad Borran ,  Aamod Khandekar ,  Avneesh Agrawal ,  Tingfang Ji

发明人： Mohammad Borran ,  Aamod Khandekar ,  Avneesh Agrawal ,  Tingfang Ji

IPC分类号： H04B7/00 ,  H04Q7/20

CPC分类号： H04W52/247 ,  H04W52/146 ,  H04W52/241 ,  H04W52/243 ,  H04W52/246 ,  H04W52/36 ,  H04W52/54

摘要： Systems and methodologies are described that facilitate serving sector directed transmit power control in a wireless communication environment. Under certain conditions, an access point can have better data with which to determine appropriate power levels than an individual terminal. Accordingly, an access point can transmit power control information to one or more terminals supported by the access point overriding normal power determination procedures. In particular, power control information can be included within an assignment message that designates resources (e.g., frequency, time) assigned to a terminal. Power control information can be based upon SNR, quality of service requirements, interference information, any other relevant information or any combination thereof.

摘要翻译： 描述了在无线通信环境中促进服务于扇区定向发射功率控制的系统和方法。 在某些条件下，接入点可以具有比单个终端确定适当功率级别的更好的数据。 因此，接入点可以将功率控制信息发送到由接入点支持的一个或多个终端覆盖正常功率确定过程。 特别地，功率控制信息可以被包括在指定分配给终端的资源（例如，频率，时间）的分配消息内。 功率控制信息可以基于SNR，服务质量要求，干扰信息，任何其他相关信息或其任何组合。

公开(公告)号：US20070047495A1

公开(公告)日：2007-03-01

申请号：US11261159

申请日：2005-10-27

申请人： Tingfang Ji ,  Mohammad Borran

发明人： Tingfang Ji ,  Mohammad Borran

IPC分类号： H04B7/216

CPC分类号： A61K31/501 ,  H04L1/1812 ,  H04W36/18

摘要： A terminal communicates with a serving base station and at least one soft handoff (SHO) base station for soft handoff on the reverse link in a wireless communication system. In one design, the serving base station schedules the terminal for transmission on the reverse link, forms an assignment for the terminal, and generates signaling for the terminal. The assignment indicates communication parameter(s) to be used by the terminal for transmission on the reverse link. The signaling contains sufficient information to allow the SHO base station(s) to receive and process the transmission from the terminal. The serving base station sends the signaling via a backhaul to the SHO base station(s). Each SHO base station receives the signaling via the backhaul, receives the transmission from the terminal via the reverse link, and processes the transmission in accordance with the signaling to recover the data sent in the transmission.

摘要翻译： 终端在无线通信系统中与反向链路上的服务基站和至少一个软切换（SHO）基站进行软切换通信。 在一种设计中，服务基站在反向链路上调度终端进行传输，形成终端的分配，并为终端生成信令。 分配表示终端用于反向链路传输的通信参数。 信令包含足够的信息，以允许SHO基站从终端接收和处理传输。 服务基站通过回程将信令发送到SHO基站。 每个SHO基站经由回程接收信令，经由反向链路从终端接收传输，并根据该信令处理该传输，以恢复传输中发送的数据。

公开(公告)号：US20080014979A1

公开(公告)日：2008-01-17

申请号：US11761267

申请日：2007-06-11

申请人： Alexei Gorokhov ,  Aamod Khandekar ,  Tamer Kadous ,  Mohammad Borran

发明人： Alexei Gorokhov ,  Aamod Khandekar ,  Tamer Kadous ,  Mohammad Borran

IPC分类号： H04Q7/20

CPC分类号： H04W52/16 ,  H04W52/146 ,  H04W52/241 ,  H04W52/243 ,  H04W52/244 ,  H04W52/325 ,  H04W52/40

摘要： Techniques for controlling transmit power of a terminal are described. The terminal may send a first transmission (e.g., for pilot or signaling) on the reverse link, receive feedback (e.g., a power control command or an erasure indicator) for the first transmission, and adjust a reference power level based on the feedback. The terminal may also receive interference information and possibly other parameters such as a pilot quality indicator (PQI), an offset factor, and a boost factor from a sector. The terminal may determine transmit power for a second transmission to the sector based on the interference information, the reference power level, and/or the other parameters. The terminal may receive the feedback from one sector and may send the second transmission with CDMA or OFDMA to the same sector or a different sector.

摘要翻译： 描述用于控制终端的发射功率的技术。 终端可以在反向链路上发送第一传输（例如，用于导频或信令），接收用于第一传输的反馈（例如，功率控制命令或擦除指示符），并且基于反馈来调整参考功率电平。 终端还可以从扇区接收干扰信息和可能的其它参数，例如导频质量指示符（PQI），偏移因子和增强因子。 终端可以基于干扰信息，参考功率电平和/或其他参数来确定对扇区的第二传输的发射功率。 终端可以从一个扇区接收反馈，并且可以将具有CDMA或OFDMA的第二传输发送到同一扇区或不同扇区。