-
公开(公告)号：US09755708B2
公开(公告)日：2017-09-05
申请号：US12424318
申请日：2009-04-15
IPC分类号： H04L5/16 , H04B7/0413 , H04B7/06 , H04L1/18 , H04B7/04
CPC分类号： H04B7/0413 , H04B7/0465 , H04B7/0478 , H04B7/0615 , H04L1/1867
摘要： A user equipment device has a control information decoder configured to receive and decode an uplink scheduling grant. A transmit module is configured to receive a rank indicator (RI) extracted by the decoder and adapt a transmission rank in response to the RI. At least two transmit antennas are configured to transmit according to the RI.
-
82.发明授权公开(公告)号：US09565001B2
公开(公告)日：2017-02-07
申请号：US12129932
申请日：2008-05-30
CPC分类号： H04L5/0048 , H04J11/0069 , H04L5/0007 , H04L5/0023 , H04L5/0053 , H04L5/0092 , H04L27/2613 , H04L27/2626 , H04L27/2655 , H04L27/2657 , H04L27/2675
摘要： Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter is for use with a base station in a cellular communication system and includes a partitioning unit configured to provide first and second groups of guard subcarriers that partition a synchronization portion from data portions in a downlink synchronization signal. The transmitter also includes a transmit unit configured to transmit the downlink synchronization signal. Additionally, the receiver is for use with user equipment in a cellular communication system and includes a receive unit configured to receive a downlink synchronization signal. The receiver also includes a processing unit configured to provide a synchronization portion based on employing first and second groups of guard subcarriers that partition the synchronization portion from data portions of the downlink synchronization signal.
摘要翻译： 本公开的实施例提供发射机，接收机和操作发射机和接收机的方法。 在一个实施例中，发射机用于蜂窝通信系统中的基站，并且包括分配单元，其被配置为提供在下行链路同步信号中从数据部分划分同步部分的第一组和第二组保护子载波。 发射机还包括被配置为发送下行链路同步信号的发射单元。 此外，接收机用于蜂窝通信系统中的用户设备，并且包括被配置为接收下行链路同步信号的接收单元。 接收机还包括一个处理单元，该处理单元被配置为基于使用从下行链路同步信号的数据部分划分同步部分的第一和第二组保护子载波来提供同步部分。
-
83.发明授权Computer generated sequences for downlink and uplink signals in wireless communication systems 有权无线通信系统中下行链路和上行链路信号的计算机生成序列公开(公告)号：US09344314B2
公开(公告)日：2016-05-17
申请号：US12108448
申请日：2008-04-23
CPC分类号： H04W56/001 , H04J13/0059 , H04J13/0062 , H04L5/0007 , H04L5/0048 , H04L27/2613 , H04L27/2655 , H04W72/0413
摘要： The present disclosure provides a base station transmitter, a user equipment transmitter and methods of operating the base station and user equipment transmitters. In one embodiment, the base station transmitter is for use with a cellular communication system and includes a synchronization unit configured to provide a randomly-generated constant amplitude zero autocorrelation (random-CAZAC) sequence corresponding to a downlink synchronization signal. Additionally, the base station transmitter also includes a transmit unit configured to transmit the downlink synchronization signal using the random-CAZAC sequence. In another embodiment, the user equipment transmitter is for use with a cellular communication system and includes a reference signal unit configured to provide a random-CAZAC sequence for an uplink reference signal corresponding to a one resource block allocation of the user equipment. The user equipment transmitter also includes a transmit unit configured to transmit the uplink reference signal using the random-CAZAC sequence.
摘要翻译： 本公开提供了一种基站发射机，用户设备发射机和操作基站和用户设备发射机的方法。 在一个实施例中，基站发射机用于蜂窝通信系统，并且包括配置成提供与下行链路同步信号相对应的随机生成的恒幅零自相关（random-CAZAC）序列的同步单元。 此外，基站发射机还包括被配置为使用随机CAZAC序列发送下行链路同步信号的发射单元。 在另一实施例中，用户设备发射机用于蜂窝通信系统，并且包括参考信号单元，该参考信号单元被配置为针对与用户设备的一个资源块分配对应的上行链路参考信号提供随机CAZAC序列。 用户设备发射机还包括被配置为使用随机CAZAC序列来发送上行链路参考信号的发射单元。
-
公开(公告)号：US08917756B2
公开(公告)日：2014-12-23
申请号：US13403223
申请日：2012-02-23
IPC分类号： H04B1/69 , H04B1/707 , H04B1/713 , H04B1/7083 , H04B1/7073 , H04J13/00 , H04J13/12
CPC分类号： H04B1/7083 , H04B1/70735 , H04J13/00 , H04J13/12
摘要： A wireless communication system. The system comprises transmitter circuitry (BST1), the transmitter circuitry comprising encoder circuitry (50) for transmitting a plurality of frames (FR). Each of the plurality of frames comprises a primary synchronization code (PCS) and a second synchronization code (SSC). The encoder circuitry comprises of circuitry (501) for providing the primary synchronization code in response to a first sequence (32). The encoder circuitry further comprises circuitry (502) for providing the secondary synchronization code in response to a second sequence (54) and a third sequence (56). The second sequence is selected from a plurality of sequences. Each of the plurality of sequences is orthogonal with respect to all other sequences. The third sequence is a subset of bits from the first sequence.
-
公开(公告)号：US08670458B2
公开(公告)日：2014-03-11
申请号：US13421593
申请日：2012-03-15
CPC分类号： H04L12/2838 , H04B3/54 , H04B3/56 , H04B2203/5416 , H04B2203/5466 , H04L12/413 , H04L2012/2843
摘要： Systems and methods for designing, using, and/or implementing slotted channel access techniques in network communications are described. In some embodiments, a method may include selecting one of a plurality of time slots within a contention access period (CAP), each of the plurality of time slots having a predetermined duration, and transmitting a packet during the selected time slot. For example, the time slot may be selected randomly or based on a round-robin algorithm. In some implementations, the duration of each of the plurality of time slots may correspond and/or be equal to: (a) a duration of a data packet of maximum size, (b) a sum of durations of a request-to-send packet, an interframe space, and a clear-to-send packet, and/or (c) a duration of a guaranteed time slot (GTS) or contention free period (CFP) request packet, as prescribed by a given communication protocol or standard.
摘要翻译： 描述了在网络通信中设计，使用和/或实现时隙信道接入技术的系统和方法。 在一些实施例中，一种方法可以包括选择争用访问周期（CAP）中的多个时隙中的一个，多个时隙中的每个时隙具有预定的持续时间，并且在所选择的时隙期间发送分组。 例如，可以随机地或基于循环算法选择时隙。 在一些实现中，多个时隙中的每一个的持续时间可以对应于和/或等于：（a）最大大小的数据分组的持续时间，（b）请求发送的持续时间之和 分组，帧间间隔和清除发送分组，和/或（c）由给定通信协议或标准规定的保证时隙（GTS）或无争用周期（CFP）请求分组的持续时间 。
-
公开(公告)号：US20130049939A1
公开(公告)日：2013-02-28
申请号：US13593428
申请日：2012-08-23
IPC分类号： G08C19/12
CPC分类号： H04L12/413 , H04B3/54 , H04B3/542 , H04B2203/5408 , H04B2203/5433 , H04L69/02
摘要： Systems and methods for enhanced carrier sense multiple access (CSMA) protocols are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method may include attempting to access a communications channel to transmit a frame after a backoff time proportional to a randomly generated number within a contention window (CW), the CW having an initial value carried over from a previous transmission of a different frame. Additionally or alternatively, some of techniques described herein may facilitate the spreading of the time over which devices attempt to transmit packets, thereby reducing the probability of collisions using, for example, Additive Decrease Multiplicative Increase (ADMI) mechanisms.
-
公开(公告)号：US20120320932A1
公开(公告)日：2012-12-20
申请号：US13528667
申请日：2012-06-20
申请人： GANG XU , RAMANUJA VEDANTHAM , KUMARAN VIJAYASANKAR , ANAND G. DABAK , TARKESH PANDE , IL HAN KIM , XIAOLIN LU
发明人： GANG XU , RAMANUJA VEDANTHAM , KUMARAN VIJAYASANKAR , ANAND G. DABAK , TARKESH PANDE , IL HAN KIM , XIAOLIN LU
CPC分类号： H04L69/22 , H04B3/54 , H04B3/542 , H04B2203/5408
摘要： A method of powerline communications including a first node and at least a second node on a PLC channel in a PLC network. The first node sends a physical layer (PHY) data frame on the PLC channel including a preamble, PHY header, a MAC header and a MAC payload. The PHY header includes a destination address field having a destination address therein. The second node receives the data frame. The second node compares its network address to the destination address before decoding the MAC header and MAC payload, providing power savings by allowing the second node to not decode the MAC header or MAC payload if its network address does not match the destination address in the PHY header of the data frame.
摘要翻译： 一种电力线通信方法，包括PLC网络中PLC通道上的第一节点和至少第二节点。 第一节点在PLC信道上发送物理层（PHY）数据帧，包括前导码，PHY头，MAC头和MAC有效载荷。 PHY标头包括其中具有目的地地址的目的地地址字段。 第二个节点接收数据帧。 第二节点在解码MAC报头和MAC有效载荷之前将其网络地址与目标地址进行比较，通过允许第二节点如果其网络地址与PHY中的目标地址不匹配，则不解码MAC报头或MAC有效载荷，从而提供功率节省 数据帧的头。
-
公开(公告)号：US20120320931A1
公开(公告)日：2012-12-20
申请号：US13524505
申请日：2012-06-15
IPC分类号： H04L12/413
CPC分类号： H04L12/413 , G05B15/02 , G05B19/052 , G05B2219/15018
摘要： A method of powerline communications (PLC) in a PLC network having a plurality of nodes including a first node and a second node. A first node receives a PLC signal from the second node. The first node decodes a media access control (MAC) frame of the PLC signal to determine a frame size of the MAC frame. Based on the frame size, dynamic selection of a Response Inter-Frame Space (RIFS) value from at least two candidate RIFS values and a Contention Inter-frame Space (CIFS) value from at least two candidate CIFS values is provided.
摘要翻译： 一种具有包括第一节点和第二节点的多个节点的PLC网络中的电力线通信（PLC）的方法。 第一节点从第二节点接收PLC信号。 第一节点解码PLC信号的媒体访问控制（MAC）帧以确定MAC帧的帧大小。 基于帧大小，提供来自至少两个候选RIFS值的响应帧间空间（RIFS）值和来自至少两个候选CIFS值的竞争帧间空间（CIFS）值的动态选择。
-
公开(公告)号：US20120257682A1
公开(公告)日：2012-10-11
申请号：US13442248
申请日：2012-04-09
申请人： ANAND G. DABAK , GANG XU
发明人： ANAND G. DABAK , GANG XU
IPC分类号： H04B3/54
CPC分类号： H04B3/54 , H04B2203/542
摘要： A method of power line communications includes obtaining timing information for an AC mains signal transmitted on a power line in a power line communication (PLC) system that includes at least one receiver and at least one other device connected on the power line which provides variable loading during cycles of the AC mains signal. A first loading interval within at least a first cycle of the cycles having lower loading and at least a second loading interval within said first cycle having higher loading are identified using the timing information. At least one data packet is transmitted only during the first loading interval over the power line to the receiver.
摘要翻译： 电力线通信的方法包括获得在包括至少一个接收器的电力线通信（PLC）系统中的电力线上传输的AC电力信号的定时信息，以及连接在电力线上的至少一个其他设备，其提供可变负载 在交流电源信号的周期。 使用定时信息来识别在具有较高负载的所述第一周期内具有较低负载和至少第二负载间隔的周期的至少第一周期内的第一加载间隔。 至少一个数据分组仅在电力线上的第一加载间隔期间被发送到接收机。
-
公开(公告)号：US08223867B2
公开(公告)日：2012-07-17
申请号：US09777203
申请日：2001-02-05
CPC分类号： H04L1/1664 , H04L1/0026 , H04L1/0054 , H04L1/006 , H04L1/1614 , H04L1/1819 , H04L1/1835 , H04L1/1874 , H04L1/188 , H04W24/00 , H04W24/06 , H04W28/04 , H04W28/06 , H04W28/22 , H04W48/16 , H04W72/02 , H04W84/10
摘要： A data encoding algorithm can be used (120) to generate overhead bits from original data bits, and the original data bits and overhead bits can be transmitted in respectively separate transmissions (121, 123), if the overhead bits are needed. At the receiver, the original data bits can be determined (125) from the received overhead bits, or the received data bits and the received overhead bits can be combined and decoded together (126) to produce the original data bits.
摘要翻译： 可以使用数据编码算法（120）从原始数据位产生开销比特，并且如果需要开销比特，则原始数据比特和开销比特可以分别在分别的传输（121,123）中发送。 在接收机处，可以从接收的开销比特确定原始数据比特（125），或者将接收的数据比特和接收的开销比特组合并解码（126）以产生原始数据比特。
-
-
-
-
-
-
-
-
-
搜索结果
249 条记录 (耗时 0.02 秒)
