公开(公告)号：US07359311B1

公开(公告)日：2008-04-15

申请号：US10418694

申请日：2003-04-18

申请人： Milind D. Paranjpe ,  Brian Hart ,  David J. Pignatelli ,  Ender Ayanoglu ,  Eldad Perahia ,  Philip J. Ryan ,  Bretton Lee Douglas ,  Uri Parker

发明人： Milind D. Paranjpe ,  Brian Hart ,  David J. Pignatelli ,  Ender Ayanoglu ,  Eldad Perahia ,  Philip J. Ryan ,  Bretton Lee Douglas ,  Uri Parker

IPC分类号： H04J11/00

CPC分类号： H04L27/2647 ,  H04L1/20 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0228

摘要： A method, apparatus, and carrier medium for determining channel state information (CSI) in an OFDM radio receiver. The receiver is for receiving packets of OFDM data as a result of OFDM data being transmitted. The method includes forming an estimate of the channels of the subcarriers for received OFDM data to provide frequency responses of the channels of the subcarriers, and forming a measure of quality (“channel state information,” “CSI”) for the channels of the subcarriers based on the relative strength of the frequency responses. The forming of the CSI does not require estimating the relative amount of noise or interference in each channel. The formed CSI is used in demodulating and decoding received OFDM data.

摘要翻译： 一种用于在OFDM无线电接收机中确定信道状态信息（CSI）的方法，装置和载波介质。 该接收机是用于接收OFDM数据的数据包作为发送OFDM数据的结果。 该方法包括形成用于接收的OFDM数据的子载波的信道的估计，以提供子载波的信道的频率响应，并且形成用于子载波的信道的质量度量（“信道状态信息”，“CSI”） 基于频率响应的相对强度。 CSI的形成不需要估计每个信道中的相对噪声或干扰量。 所形成的CSI用于解调和解码接收的OFDM数据。

公开(公告)号：US08625507B1

公开(公告)日：2014-01-07

申请号：US12932801

申请日：2011-03-07

申请人： Ozgur Gurbuz ,  David Pignatelli ,  David Stephenson ,  Eldad Perahia ,  Bretton Douglas ,  Ender Ayanoglu

发明人： Ozgur Gurbuz ,  David Pignatelli ,  David Stephenson ,  Eldad Perahia ,  Bretton Douglas ,  Ender Ayanoglu

IPC分类号： H04W4/00 ,  H04J3/16

CPC分类号： H04B7/0689 ,  H04B7/0413 ,  H04B7/0628 ,  H04B7/0871 ,  H04W28/22 ,  H04W84/12

摘要： An apparatus and method for operating a Multiple Input Multiple Output (MIMO)-capable subscriber node are disclosed. In one embodiment, an apparatus includes a MIMO-capable physical layer transceiver and a Medium Access Control (MAC) layer block that measures a received transmission to determine channel conditions. Upon receiving a transmission wherein said channel conditions meet specified conditions, the MAC layer block transmits a message to an access point indicating that the apparatus wants to switch between a non-MIMO mode and a MIMO mode, and upon receiving an acknowledgement, the MAC layer block switches between the non-MIMO mode and the MIMO mode. An apparatus for operating an access node is also disclosed.

摘要翻译： 公开了一种用于操作多输入多输出（MIMO）能力的用户节点的装置和方法。 在一个实施例中，一种装置包括MIMO能力的物理层收发机和媒体接入控制（MAC）层块，其测量接收到的传输以确定信道状况。 在接收到所述信道条件满足指定条件的传输时，MAC层块向接入点发送指示设备在非MIMO模式和MIMO模式之间切换的消息，并且在接收到确认时，MAC层 在非MIMO模式和MIMO模式之间进行块切换。 还公开了一种用于操作接入节点的装置。

公开(公告)号：US07301924B1

公开(公告)日：2007-11-27

申请号：US10197300

申请日：2002-07-15

申请人： Ozgur Gurbuz ,  David Pignatelli ,  David Stephenson ,  Eldad Perahia ,  Bretton Douglas ,  Ender Ayanoglu

发明人： Ozgur Gurbuz ,  David Pignatelli ,  David Stephenson ,  Eldad Perahia ,  Bretton Douglas ,  Ender Ayanoglu

IPC分类号： H04B7/216 ,  H04J3/16

CPC分类号： H04B7/0689 ,  H04B7/0413 ,  H04B7/0628 ,  H04B7/0871 ,  H04W28/22 ,  H04W84/12

摘要： The MAC layer of a wireless communication standard is modified to facilitate MIMO (multiple input multiple output) processing and thereby increase capacity and/or spectral efficiency. In one implementation, the IEEE 802.11a standard is modified in this way. A contention free period (CFP) is divided between MIMO communications and non-MIMO communications. An access point may maintain a list of nodes operating in MIMO mode and nodes operating in non-MIMO mode.

摘要翻译： 修改无线通信标准的MAC层以促进MIMO（多输入多输出）处理，从而增加容量和/或频谱效率。 在一个实现中，以这种方式修改IEEE 802.11a标准。 无竞争时段（CFP）在MIMO通信和非MIMO通信之间划分。 接入点可以保持在MIMO模式下操作的节点列表以及以非MIMO模式工作的节点。

公开(公告)号：US07929412B1

公开(公告)日：2011-04-19

申请号：US11974848

申请日：2007-10-16

申请人： Ozgur Gurbuz ,  David Pignatelli ,  David Stephenson ,  Eldad Perahia ,  Bretton Douglas ,  Ender Ayanoglu

发明人： Ozgur Gurbuz ,  David Pignatelli ,  David Stephenson ,  Eldad Perahia ,  Bretton Douglas ,  Ender Ayanoglu

IPC分类号： H04J11/00 ,  H04L1/02 ,  H04J3/16

CPC分类号： H04B7/0689 ,  H04B7/0413 ,  H04B7/0628 ,  H04B7/0871 ,  H04W28/22 ,  H04W84/12

摘要： An apparatus and method for operating a Multiple Input Multiple Output (MIMO)-capable subscriber node are disclosed. In one embodiment, an apparatus includes a MIMO-capable physical layer transceiver and a Medium Access Control (MAC) layer block that measures a received transmission to determine channel conditions. Upon receiving a transmission wherein said channel conditions meet specified conditions, the MAC layer block requests an access point for permission to switch between a non-MIMO mode and a MIMO mode, and upon receiving permission, the MAC layer block switches between the non-MIMO mode and the MIMO mode. An apparatus for operating an access node is also disclosed.

摘要翻译： 公开了一种用于操作多输入多输出（MIMO）能力的用户节点的装置和方法。 在一个实施例中，一种装置包括MIMO能力的物理层收发机和媒体接入控制（MAC）层块，其测量接收到的传输以确定信道状况。 在接收到其中所述信道条件满足指定条件的传输时，MAC层块请求接入点以允许在非MIMO模式和MIMO模式之间切换，并且在接收到许可后，MAC层块在非MIMO 模式和MIMO模式。 还公开了一种用于操作接入节点的装置。

公开(公告)号：US5717689A

公开(公告)日：1998-02-10

申请号：US541985

申请日：1995-10-10

申请人： Ender Ayanoglu

发明人： Ender Ayanoglu

IPC分类号： H04B10/20 ,  H04J3/00 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04Q7/38 ,  H04L12/54

CPC分类号： H04L69/16 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0083 ,  H04L1/1614 ,  H04L1/1664 ,  H04L1/1809 ,  H04L1/1832 ,  H04L47/10 ,  H04L47/27 ,  H04L49/205 ,  H04L49/25 ,  H04L49/3081 ,  H04L49/557 ,  H04L69/168 ,  H04L69/169 ,  H04L1/1812 ,  H04L2012/5607 ,  H04L2012/5616 ,  H04L2012/5619 ,  H04L2012/563 ,  H04L2012/5647 ,  H04L2012/5652 ,  H04L49/3009

摘要： The present invention is a reliable data link layer protocol to transport ATM cells over a wireless point-to-point link. The protocol ensures that the cells are transported reliably by use of a sliding window transport mechanism with selective repeat automatic repeat request (ARQ) and forward error correction (FEC). The protocol minimizes ATM header overhead by means of header compression and provides per-cell FEC whose size can be changed adaptively. The protocol also provides parity cells for recovery from errors that cannot be corrected using the per-cell FEC field. The number of these cells as well as the size of a window or frame can also be adaptively changed. In addition, the window can be terminated to request an immediate acknowledgment.

摘要翻译： 本发明是通过无线点对点链路传输ATM信元的可靠数据链路层协议。 该协议确保通过使用具有选择性重复自动重复请求（ARQ）和前向纠错（FEC）的滑动窗口传输机制可靠地传送小区。 该协议通过报头压缩来最大限度地减少ATM报头开销，并且提供可以自适应地改变其大小的每小区FEC。 该协议还提供用于从不能使用每小区FEC字段校正的错误进行恢复的奇偶校验单元。 这些单元的数量以及窗口或框架的大小也可以自适应地改变。 此外，可以终止窗口以请求立即确认。

公开(公告)号：US5119196A

公开(公告)日：1992-06-02

申请号：US542612

申请日：1990-06-25

申请人： Ender Ayanoglu ,  Israel Bar-David ,  Richard D. Gitlin ,  Chih-Lin I ,  Jack H. Winters

发明人： Ender Ayanoglu ,  Israel Bar-David ,  Richard D. Gitlin ,  Chih-Lin I ,  Jack H. Winters

IPC分类号： H04N5/21

CPC分类号： H04N5/211

摘要： Ghosts are canceled in received analog TV (for IDTV, EDTV, and HDTV) signals by utilizing the fact that there are short periods of time without the analog signals (the horizontal flyback interval between the lines) to process the received signal on a line-to-line basis using a finite impulse response (FIR) or an infinite impulse response (IIR) equalizer. This line-by-line processing (which can be implemented by periodic cleansing of the equalizer) overcomes the limitations of standard equalizers to allow for 40-50 dB of suppression of ghosts, even with nulls in the spectrum, as long as the ghost delay is less than the period of time without the analog signal. Furthermore, by using time inversion in combination with line-by-line processing, the stability problem of the conventional IIR equalizer is eliminated. The IIR equalizer may be implemented on a single digital integrated circuit. Alternatively, an FIR equalizer can be used which, although it may require multiple chips (i.e., more taps), can acquire and adapt to the ghosted channel more rapidly than an IIR equalizer. With line-by-line processing, FIR and IIR equalizers can eliminate any ghost with delays up to 11 .mu.sec in IDTV or EDTV. For larger delays, a standard IIR or FIR equalizer can be used as a preprocessor to eliminate small ghosts and an adaptive antenna can be used to eliminate large ghosts. Thus, with these techniques, the ghosting problem can be eliminated in all TV receivers.

公开(公告)号：US07000021B1

公开(公告)日：2006-02-14

申请号：US09976627

申请日：2001-10-12

申请人： Ramesh Radhakrishnan ,  Kushal Patel ,  Ozgur Gurbuz ,  Ender Ayanoglu ,  Arun Khanna ,  Alon Bernstein ,  Cindy Chan

发明人： Ramesh Radhakrishnan ,  Kushal Patel ,  Ozgur Gurbuz ,  Ender Ayanoglu ,  Arun Khanna ,  Alon Bernstein ,  Cindy Chan

IPC分类号： G06F15/00

CPC分类号： H04L1/1874 ,  H04L1/1614 ,  H04L1/187 ,  H04L1/1883

摘要： Systems and methods for retransmitting unsuccessfully transmitted data across a communication link. The retransmission mechanism may be applied to point to multipoint networks including wireless networks. Each packet is encapsulated in an ARQ frame and assigned a sequence number for the purpose of coordinating acknowledgments and retransmissions. Information as to which packets require retransmission is communicated in the form of a bitmap where each bit indicates an acknowledgment status for a given packet. Any missing packets in the received sequence are assumed to require retransmission.

摘要翻译： 通过通信链路重传未成功传输的数据的系统和方法。 重传机制可以应用于包括无线网络的点对多点网络。 每个数据包被封装在一个ARQ帧中，并分配一个序列号，用于协调确认和重发。 关于哪些分组需要重传的信息以位图的形式传送，其中每个位指示给定分组的确认状态。 假设接收到的序列中的任何丢失的数据包都需要重传。

公开(公告)号：US06304349B1

公开(公告)日：2001-10-16

申请号：US09109250

申请日：1998-06-30

申请人： Murat Alanyali ,  Ender Ayanoglu

发明人： Murat Alanyali ,  Ender Ayanoglu

IPC分类号： H04B1000

CPC分类号： H04Q11/0062 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0284 ,  H04Q2011/0039 ,  H04Q2011/0073 ,  H04Q2011/0086

摘要： Methods for provisioning optical communications networks employing wavelength division multiplexing (WDM) technology provide for routing and wave-length assignment of a set of connection requests. Avoiding many of the pitfalls of exactly optimum solutions, the present heuristic methods provide much shorter execution times while providing near-optimum performance. Adaptations of the basic solutions provide design of restorable networks capable of handling a specified set of failures. This approach advantageously is based on considering all failures simultaneously, and performs better than solutions in which independent designs are developed for each failure. Networks designed using these methods store configuration information for primary network configurations and for one or more restoration networks. Upon startup or upon network failures, predetermined configuration directions are applied to wavelength selective cross-connects (WSXC) at each network node to establish (or reestablish) desired network node interconnections.

摘要翻译： 提供使用波分复用（WDM）技术的光通信网络的方法提供一组连接请求的路由和波长分配。 避免许多精确解决方案的缺陷，目前的启发式方法提供了更短的执行时间，同时提供了近乎最佳的性能。 基本解决方案的修改提供了能够处理指定故障集的可恢复网络的设计。 该方法有利地基于同时考虑所有故障，并且比对于每个故障开发独立设计的解决方案更好。 使用这些方法设计的网络存储用于主要网络配置和一个或多个恢复网络的配置信息。 在启动或网络故障时，将预定的配置方向应用于每个网络节点处的波长选择性交叉连接（WSXC），以建立（或重新建立）期望的网络节点互连。

公开(公告)号：US6014385A

公开(公告)日：2000-01-11

申请号：US781968

申请日：1996-12-28

申请人： Ender Ayanoglu ,  Kai Yin Eng ,  Mark John Karol

发明人： Ender Ayanoglu ,  Kai Yin Eng ,  Mark John Karol

IPC分类号： H04J3/16 ,  H04L12/28 ,  H04L12/403 ,  H04L12/56 ,  H04Q3/00 ,  H04Q11/04

CPC分类号： H04L12/417 ,  H04L12/5602 ,  H04L2012/5672 ,  H04L2012/5679

摘要： A telecommunications system capable of transmitting an N byte packet over a common communications channel by: temporally dividing the common communications channel into time slots that have a duration equal to ##EQU1## seconds, where i is a natural number greater than one, C is a constant and R is the transmission rate of the common communications channel in bytes per second; splitting the N byte packet into i p-packets; preparing an M byte training sequence; and transmitting the M byte training sequence and the p-packets over the common communications channel in consecutive time slots.

摘要翻译： 一种电信系统，其能够通过以下方式在公共通信信道上传输N字节分组：将公共通信信道暂时划分为具有等于秒的持续时间的时隙，其中i是大于1的自然数，C是常数，并且R 是公共通信信道的传输速率，单位为字节/秒; 将N字节分组分解成i个p分组; 准备一个M字节训练序列; 并且在连续的时隙中通过公共通信信道发送M字节训练序列和p分组。

公开(公告)号：US5719883A

公开(公告)日：1998-02-17

申请号：US310029

申请日：1994-09-21

申请人： Ender Ayanoglu

发明人： Ender Ayanoglu

IPC分类号： G06F11/10 ,  H04J1/00 ,  H04L1/00 ,  H04L1/16 ,  H04L1/18 ,  H04L27/26 ,  H03M13/00

CPC分类号： H04L1/1671 ,  H04L1/0001 ,  H04L1/0065 ,  H04L1/1819 ,  H04L1/1893 ,  H04L27/2602

摘要： Increased numbers of multipath transmission errors, that are detected by the performance of cyclic redundancy checking (CRC) over time and frequency on the words of a multitone transmission block that include mapped information bits, are correctable by forward error control as a result of the iterative performance of CRC over frequency on subblocks of the transmission block using retransmitted parity checking bits. A continuous record is maintained of the frequency channels that are detected as experiencing transmission errors in order to maximize the rate of data bit transmission on frequency channels that are likely to experience a reduced number of transmission errors.

摘要翻译： 通过随着时间和频率执行循环冗余校验（CRC）检测的多路径传输错误的增加，包括映射信息位的多音频传输块的字可以通过前向错误控制作为迭代的结果来校正 使用重传的奇偶校验位在传输块的子块上执行CRC对频率的性能。 维持经过传输错误的频道的连续记录，以便最大化可能经历减少的传输错误数的频道上的数据位传输速率。