公开(公告)号：US20080075161A1

公开(公告)日：2008-03-27

申请号：US11951742

申请日：2007-12-06

申请人： Farrokh Abrishamkar ,  John Smee ,  Seguei Glazko

发明人： Farrokh Abrishamkar ,  John Smee ,  Seguei Glazko

IPC分类号： H03H7/30 ,  H03H7/40

CPC分类号： H04L23/02 ,  H04L25/03057 ,  H04L2025/03375 ,  H04L2025/0349 ,  H04L2025/03611

摘要： A decision feedback equalizer includes a chip estimate buffer that forms chip estimates into a vector. A CCK decoder decodes the vector of chip estimates, and a CCK encoder, connected with the CCK decoder, re-encodes the vector of chip estimates into a valid CCK code word. At the same time, a chip slicer provides direct sliced chips from the chip estimates. An update module then forms a hybrid vector from the valid CCK code-word and the direct sliced chips for input to the feedback filter of the decision feedback equalizer. The hybrid feedback filter input vector reflects the CCK coding gain of its re-encoded portion thereby reducing the estimated chip error rate to improve the performance of the decision feedback equalizer.

摘要翻译： 判决反馈均衡器包括将码片估计形成向量的码片估计缓冲器。 CCK解码器解码芯片估计的向量，并且与CCK解码器连接的CCK编码器将芯片估计的向量重新编码为有效的CCK码字。 同时，芯片切片机从芯片估计提供直接切片芯片。 然后，更新模块从有效的CCK码字和直接切片的芯片形成混合矢量，以输入到判决反馈均衡器的反馈滤波器。 混合反馈滤波器输入矢量反映其重新编码部分的CCK编码增益，从而降低估计的芯片误码率，以提高判决反馈均衡器的性能。

公开(公告)号：US20080025444A1

公开(公告)日：2008-01-31

申请号：US11869609

申请日：2007-10-09

申请人： J. Walton ,  John Ketchum ,  John Smee ,  Mark Wallace ,  Steven Howard

发明人： J. Walton ,  John Ketchum ,  John Smee ,  Mark Wallace ,  Steven Howard

IPC分类号： H04L1/02

CPC分类号： H04B7/043 ,  H04B1/71072 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04B17/309 ,  H04L5/023 ,  H04W16/28

摘要： An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector used by the terminal to transmit on the uplink. An “effective” uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set (e.g., with highest overall throughput) for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing on its received symbol streams in accordance with a receiver spatial processing technique to recover the data symbol streams transmitted by the selected terminals.

公开(公告)号：US20080025425A1

公开(公告)日：2008-01-31

申请号：US11869457

申请日：2007-10-09

申请人： J. Walton ,  John Ketchum ,  John Smee ,  Mark Wallace ,  Steven Howard

发明人： J. Walton ,  John Ketchum ,  John Smee ,  Mark Wallace ,  Steven Howard

IPC分类号： H04L27/28

CPC分类号： H04B7/043 ,  H04B1/71072 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04B17/309 ,  H04L5/023 ,  H04W16/28

摘要： An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector used by the terminal to transmit on the uplink. An “effective” uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set (e.g., with highest overall throughput) for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing on its received symbol streams in accordance with a receiver spatial processing technique to recover the data symbol streams transmitted by the selected terminals.

摘要翻译： 获得每个终端的上行链路信道响应矩阵，并对其进行分解，得到终端在上行链路上使用的导向矢量。 基于其导向向量及其信道响应矩阵，为每个终端形成“有效”上行链路信道响应向量。 基于其有效信道响应向量来评估多组终端，以确定用于上行链路传输的最佳集合（例如具有最高总吞吐量）。 每个选择的终端利用其导向向量对其数据符号流执行空间处理，并将其空间处理的数据符号流发送到接入点。 多个选择的终端通过其相应的MIMO信道同时将其数据符号流发送到接入点。 接入点根据接收机空间处理技术对其接收到的符号流执行接收机空间处理，以恢复由所选终端发送的数据符号流。

公开(公告)号：US20060142041A1

公开(公告)日：2006-06-29

申请号：US11192787

申请日：2005-07-29

申请人： Stefano Tomasin ,  Henry Pfister ,  Jilei Hou ,  John Smee

发明人： Stefano Tomasin ,  Henry Pfister ,  Jilei Hou ,  John Smee

IPC分类号： H04B7/00

CPC分类号： H04W52/146 ,  H04B1/7103 ,  H04B2201/70701

摘要： A method and system for interference cancellation (IC). One aspect relates to traffic interference cancellation. Another aspect relates to joint IC for pilot, overhead and data. Another aspect relates to improved channel estimation. Another aspect relates to adaptation of transmit subchannel gains.

摘要翻译： 一种用于干扰消除（IC）的方法和系统。 一方面涉及交通干扰消除。 另一方面涉及用于飞行员，间接费用和数据的联合IC。 另一方面涉及改进的信道估计。 另一方面涉及发射子信道增益的适应。

公开(公告)号：US20060141933A1

公开(公告)日：2006-06-29

申请号：US11192503

申请日：2005-07-29

申请人： John Smee ,  Henry Pfister ,  Jilei Hou ,  Stefano Tomasin

发明人： John Smee ,  Henry Pfister ,  Jilei Hou ,  Stefano Tomasin

IPC分类号： H04B1/00

CPC分类号： H04B1/7107 ,  H04B1/7105 ,  H04B1/7115 ,  H04B2001/71077 ,  H04B2201/70701 ,  H04L25/0212

摘要： A method and system for interference cancellation (IC). One aspect relates to traffic interference cancellation. Another aspect relates to joint IC for pilot, overhead and data. Another aspect relates to improved channel estimation. Another aspect relates to adaptation of transmit subchannel gains.

公开(公告)号：US20060030352A1

公开(公告)日：2006-02-09

申请号：US10942590

申请日：2004-09-15

申请人： Kiran Kiran ,  John Smee

发明人： Kiran Kiran ,  John Smee

IPC分类号： H04B7/00

CPC分类号： H04W52/08 ,  H04W52/243 ,  H04W52/26 ,  H04W52/367

摘要： Systems and techniques for wireless communications are disclosed. The systems and techniques include the generation of a signal, the setting of an average transmit power of the signal transmission as a function of a first threshold relating to out-of-band emissions, the clipping of the signal as a function of a second threshold relating to peak transmit power, and the transmission of the signal over a wireless medium.

摘要翻译： 公开了用于无线通信的系统和技术。 该系统和技术包括信号的产生，作为与带外发射相关的第一阈值的函数的信号传输的平均发射功率的设置，作为第二阈值的函数的信号的削波 涉及峰值发射功率，以及通过无线介质传输信号。

公开(公告)号：US20080107048A1

公开(公告)日：2008-05-08

申请号：US11963016

申请日：2007-12-21

申请人： Ahmad Jalali ,  John Smee ,  Mark Wallace

发明人： Ahmad Jalali ,  John Smee ,  Mark Wallace

IPC分类号： H04J3/00

CPC分类号： H04L1/0032 ,  H04B7/0434 ,  H04B7/0626 ,  H04L1/0003 ,  H04L1/0013 ,  H04L1/0026 ,  H04L1/0034 ,  H04L1/06 ,  H04L5/0023 ,  H04L25/0204 ,  H04L25/0224 ,  H04L25/0226 ,  H04L25/03343 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03426

摘要： Techniques to process data for transmission in a time division duplexed (TDD) communication system. In one aspect, the frequency response of a forward link is estimated at a base station based on reverse link transmissions (e.g., pilots) from a terminal. Prior to a data transmission on the forward link, the base station determines a reverse transfer function based on the pilots transmitted by the terminal, “calibrates” the reverse transfer function with a calibration function to derive an estimate of a forward transfer function, and preconditions modulation symbols based on weights derived from the forward transfer function. In another aspect, the terminal estimates the “quality” of the forward link and provides this information to the base station. The base station then uses the information to properly code and modulate data prior to transmission such that the transmitted data can be received by the terminal at the desired level of performance.

摘要翻译： 在时分双工（TDD）通信系统中处理用于传输的数据的技术。 在一个方面，基于来自终端的反向链路传输（例如，导频）在基站处估计前向链路的频率响应。 在前向链路上的数据传输之前，基站基于终端发送的导频来确定反向传递函数，使用校准函数“校准”反向传递函数来导出正向传递函数的估计，以及前提条件 基于从前向传递函数导出的权重的调制符号。 在另一方面，终端估计前向链路的“质量”，并将该信息提供给基站。 然后，基站使用该信息在发送之前对数据进行适当的编码和调制，使得所发送的数据能够以期望的性能水平由终端接收。

公开(公告)号：US07099384B1

公开(公告)日：2006-08-29

申请号：US09654177

申请日：2000-09-01

申请人： Ahmad Jalali ,  John Smee ,  Parag Agashe

发明人： Ahmad Jalali ,  John Smee ,  Parag Agashe

IPC分类号： H03H7/30 ,  H03H7/40 ,  H03K5/159

CPC分类号： H04W52/343 ,  H04B7/005 ,  H04B7/0617 ,  H04W52/40

摘要： In a CDMA data communication system capable of variable rate data transmission, a time-division power assignment cyclically reduces the carrier power level to at least one sector to reduce interference in neighboring sectors. The base station determines a time-division power assignment for each sector and generates signals according to the power assignment. The mobile unit generates filter coefficients corresponding to each power level. The mobile unit estimates Carrier Signal-to-Interference (C/I) to determine a data rate for each power level. Previous iterations of the equalizer are stored and used to refine future estimates.

摘要翻译： 在能够进行可变速率数据传输的CDMA数据通信系统中，时分功率分配循环地将载波功率电平降低到至少一个扇区，以减少相邻扇区的干扰。 基站确定每个扇区的时分功率分配，并根据功率分配产生信号。 移动单元产生对应于每个功率电平的滤波器系数。 移动单元估计载波信号到干扰（C / I）以确定每个功率电平的数据速率。 均衡器的先前迭代被存储并用于改进未来的估计。

公开(公告)号：US20060141934A1

公开(公告)日：2006-06-29

申请号：US11192769

申请日：2005-07-29

申请人： Henry Pfister ,  Jilei Hou ,  John Smee ,  Stefano Tomasin

发明人： Henry Pfister ,  Jilei Hou ,  John Smee ,  Stefano Tomasin

IPC分类号： H04B1/00 ,  H04B17/00

CPC分类号： H04B1/7103

摘要： A method and system for interference cancellation (IC). One aspect relates to traffic interference cancellation. Another aspect relates to joint IC for pilot, overhead and data. Another aspect relates to improved channel estimation. Another aspect relates to adaptation of transmit subchannel gains.

公开(公告)号：US20060072533A1

公开(公告)日：2006-04-06

申请号：US10960312

申请日：2004-10-06

申请人： John Smee ,  Jilei Hou ,  Kiran Kiran ,  Naga Bhushan ,  Rashid Attar

发明人： John Smee ,  Jilei Hou ,  Kiran Kiran ,  Naga Bhushan ,  Rashid Attar

IPC分类号： H04B7/216

CPC分类号： H04L1/1887 ,  H04L1/1812

摘要： Methods and apparatuses to selectively assign interlace preference factors to a plurality of user terminals to use a plurality of interlaces. These methods and apparatuses may improve capacity compared to a system that allows each user terminal to transmit data in every interlace.

摘要翻译： 用于选择性地将交错偏好因子分配给多个用户终端以使用多个交织的方法和装置。 与允许每个用户终端在每个交织中传输数据的系统相比，这些方法和装置可以提高容量。