公开(公告)号：US20070291714A1

公开(公告)日：2007-12-20

申请号：US11621987

申请日：2007-01-10

申请人： Rajiv Laroia ,  Frank Lane ,  Junyi Li ,  Tom Richardson

发明人： Rajiv Laroia ,  Frank Lane ,  Junyi Li ,  Tom Richardson

IPC分类号： H04Q7/24

CPC分类号： H04W40/244 ,  H04J3/0602 ,  H04L5/0016 ,  H04L5/0035 ,  H04L5/0048 ,  H04L27/2601 ,  H04L27/261 ,  H04W8/005 ,  H04W16/14 ,  H04W28/04 ,  H04W28/18 ,  H04W36/16 ,  H04W36/24 ,  H04W40/24 ,  H04W48/08 ,  H04W48/16 ,  H04W48/20 ,  H04W52/0229 ,  H04W52/04 ,  H04W72/02 ,  H04W76/14 ,  H04W84/042 ,  H04W84/18 ,  H04W88/02 ,  H04W88/04 ,  H04W88/06 ,  H04W88/10 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/22 ,  Y02D70/23

摘要： Methods and apparatus supporting efficient paging in a wireless communications system supporting both access node based communications and peer to peer communications are described. Paging timing intervals are set aside in the timing structure such that multi-mode wireless terminals can monitor, e.g., in an infrastructure band, for pages from a base station whether the wireless terminal is operating in a base station attachment point mode or is operating in a peer to peer communications mode. Wireless terminals operating in a peer to peer mode, e.g., using a non-infrastructure band, suspends peer to peer communications during the paging intervals. The time periods, in which the wireless terminal checks pages are, in some embodiments, predetermined, so that both the wireless terminal and base station are synchronized on when a page should be delivered. This synchronization helps reduce the wastage of session time in the peer to peer sessions.

摘要翻译： 描述了支持基于接入节点的通信和对等通信的无线通信系统中的有效寻呼的方法和装置。 在定时结构中设置寻呼定时间隔，使得多模式无线终端可以例如在基础设施频带中监视来自基站的页面，无论无线终端是以基站附着点模式操作还是在基站工作 对等通信模式。 以对等方式工作的无线终端，例如使用非基础设施频段，在寻呼间隔期间暂停对等通信。 在一些实施例中，无线终端检查页面的时间段是预定的，使得无线终端和基站在页面应该被递送时同步。 该同步有助于减少对等会话中会话时间的浪费。

公开(公告)号：US07289050B1

公开(公告)日：2007-10-30

申请号：US11477139

申请日：2006-06-27

申请人： Rajiv Laroia ,  Tom Richardson ,  Frank A. Lane

发明人： Rajiv Laroia ,  Tom Richardson ,  Frank A. Lane

IPC分类号： H03M3/00

CPC分类号： H03M7/3006 ,  H03M3/386 ,  H03M3/50 ,  H03M7/3017 ,  H03M7/3028 ,  H03M7/3031 ,  H03M7/304

摘要： Methods and apparatus for implementing and/or using amplifiers and performing various amplification related operations are described. The methods are well suited for use with, but not limited to, switching type amplifiers. The methods and apparatus described herein allow for the use of switching amplifiers while reducing and/or compensating for distortions that the use of such amplifiers would normally create. The described methods and apparatus can be used alone or in combination with various novel signaling schemes which can make it easier to compensate for the non-ideal behavior of switching amplifiers in such a way as to enable practical application in wireless transmission and/or other applications.

摘要翻译： 描述了用于实现和/或使用放大器并执行各种放大相关操作的方法和装置。 这些方法非常适用于但不限于开关型放大器。 本文描述的方法和装置允许使用开关放大器，同时减少和/或补偿通常使用这种放大器的失真。 所描述的方法和装置可以单独使用或与各种新颖的信令方案组合使用，这可以使得更容易以这样的方式补偿开关放大器的非理想行为，使得无线传输和/或其他应用中的实际应用 。

公开(公告)号：US20070242765A1

公开(公告)日：2007-10-18

申请号：US11486881

申请日：2006-07-14

申请人： Vladimir Parizhisky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Vladimir Parizhisky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04K1/10

CPC分类号： H04L27/2613 ,  H04L5/023 ,  H04L27/2614 ,  H04L27/2655

摘要： A composite signal includes a high power beacon signal and low power corresponding wideband synchronization signal and is communicated over a time interval exceeding a single OFDM transmission time interval. A base station transmits one or more different such composite broadcast signals in a recurring timing structure. Each different potential beacon signal, e.g., a single tone signal, is paired with a unique wideband synchronization signal. A wideband synchronization signal includes at least some predetermined null tones and at least some predetermined non-null tones. For a given wideband synchronization signal, the predetermined null tones carry predetermined modulation symbol values, A wireless terminal receives a composite signal, identifies a beacon, determines a corresponding known wideband synchronization signal, compares received to known wideband synchronization signals, and determines at least one of a timing adjustment, frequency adjustment and channel estimation.

摘要翻译： 复合信号包括高功率信标信号和低功率对应的宽带同步信号，并且在超过单个OFDM传输时间间隔的时间间隔上传送。 基站以循环定时结构发送一个或多个不同的这种复合广播信号。 每个不同的潜在信标信号，例如单个音调信号，与唯一的宽带同步信号配对。 宽带同步信号至少包括一些预定的无效音调和至少一些预定的非空音调。 对于给定的宽带同步信号，预定的空音携带预定的调制符号值，A无线终端接收复合信号，识别信标，确定对应的已知宽带同步信号，将已接收的已知宽带同步信号进行比较，并确定至少一个 定时调整，频率调整和信道估计。

公开(公告)号：US20070206554A1

公开(公告)日：2007-09-06

申请号：US11621985

申请日：2007-01-10

申请人： Rajiv Laroia ,  Frank Lane ,  Junyi Li ,  Tom Richardson

发明人： Rajiv Laroia ,  Frank Lane ,  Junyi Li ,  Tom Richardson

IPC分类号： H04Q7/24

CPC分类号： H04W40/244 ,  H04J3/0602 ,  H04L5/0016 ,  H04L5/0035 ,  H04L5/0048 ,  H04L27/2601 ,  H04L27/261 ,  H04W8/005 ,  H04W16/14 ,  H04W28/04 ,  H04W28/18 ,  H04W36/16 ,  H04W36/24 ,  H04W40/24 ,  H04W48/08 ,  H04W48/16 ,  H04W48/20 ,  H04W52/0229 ,  H04W52/04 ,  H04W72/02 ,  H04W76/14 ,  H04W84/042 ,  H04W84/18 ,  H04W88/02 ,  H04W88/04 ,  H04W88/06 ,  H04W88/10 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/22 ,  Y02D70/23

摘要： Wireless devices, e.g., in a cognitive radio network, discover and use locally available usable spectrum for communication. Beacon signaling facilitates available spectrum discovery, spectrum usage coordination, and device identification. A wireless terminal, which may have entered a new area and powered up, monitors to detect for the presence of beacon signals in a communications band. When the wireless terminal fails to detect a beacon, the wireless terminal assumes that the spectrum is available and transmits its user beacon signal thereby providing notification of its presence in the area to other wireless terminals. The wireless terminal maintains a coordinated timing relationship between its beacon transmit interval and beacon detect interval, which are performed on an ongoing basis. The combination of beacon TX interval and beacon monitoring interval represents a small fraction of total time, allowing for power conservation. The coordinated timing relationship, known to peers, facilitates efficient peer-peer communications session establishment.

摘要翻译： 无线设备，例如在认知无线电网络中，发现并使用本地可用的可用频谱进行通信。 信标信号便于可用的频谱发现，频谱使用协调和设备识别。 可能已进入新区域并加电的无线终端监视以检测通信频带中信标信号的存在。 当无线终端无法检测到信标时，无线终端假设频谱可用，并发送其用户信标信号，从而向其他无线终端提供其在该区域中的存在的通知。 无线终端在其信标发送间隔和信标检测间隔之间保持协调的定时关系，其在持续的基础上执行。 信标TX间隔和信标监测间隔的组合代表总时间的一小部分，从而实现节能。 对等体已知的协调定时关系有助于高效的对等通信会话建立。

公开(公告)号：US20070165728A1

公开(公告)日：2007-07-19

申请号：US11333759

申请日：2006-01-17

申请人： Vladimir Parizhsky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li

发明人： Vladimir Parizhsky ,  Rajiv Laroia ,  Alexander Leonidov ,  Tom Richardson ,  Junyi Li

IPC分类号： H04K1/10

CPC分类号： H04L27/2613 ,  H04L27/2607 ,  H04L27/2655 ,  H04W48/08 ,  H04W52/325 ,  H04W56/00 ,  H04W56/003 ,  H04W88/08

摘要： A base station generates and transmits a multi-symbol beacon/timing synchronization signal. The multi-symbol beacon/timing synchronization signal includes: (i) an initial symbol including a body portion and a cyclic prefix, the cyclic prefix preceding the body portion and being generated from an end portion of the body portion and (ii) an extension symbol, which immediately follows the initial symbol. The extension symbol includes a first copy of the body portion beginning at the start of the extension symbol. The first copy of the body portion is immediately followed by a truncated portion, which is a copy of an initial portion of the body portion. The multi-symbol beacon/timing synchronization signal includes a single high power beacon tone, a plurality of low power tones comprising the synchronization signal, and a plurality of intentional Null tones. Each tone designation remains the same for both the initial symbol and the extension symbol.

摘要翻译： 基站生成并发送多符号信标/定时同步信号。 多符号信标/定时同步信号包括：（i）包括主体部分和循环前缀的初始符号，主体部分之前的循环前缀，并且从主体部分的端部生成，以及（ii）扩展 符号，紧跟着初始符号。 扩展符号包括从扩展符号开始开始的主体部分的第一副本。 主体部分的第一份副本后面紧跟着截面部分，该部分是主体部分的初始部分的副本。 多符号信标/定时同步信号包括单个高功率信标音调，包括同步信号的多个低功率音调以及多个有意的空音调。 对于初始符号和扩展符号，每个音色指定保持相同。

公开(公告)号：US20050233752A1

公开(公告)日：2005-10-20

申请号：US11004156

申请日：2004-12-03

申请人： Rajiv Laroia ,  Junyi Li ,  Tom Richardson

发明人： Rajiv Laroia ,  Junyi Li ,  Tom Richardson

IPC分类号： H04W36/28 ,  H04L5/02 ,  H04L27/26 ,  H04W16/00 ,  H04W16/02 ,  H04W16/24 ,  H04W28/18 ,  H04W48/12 ,  H04Q7/20

CPC分类号： H04L27/2602 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0037 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/023 ,  H04W16/12 ,  H04W16/24 ,  H04W24/02 ,  H04W48/12 ,  H04W52/143 ,  H04W52/322 ,  H04W52/386 ,  H04W92/20

摘要： Methods and apparatus for implementing a multi-carrier communications system are described. Various approaches to a phased system deployment and system configurations resulting from different levels of deployment are described. In addition mobile node and methods of operating mobile nodes in communications systems that may have different levels of deployment in different cells are described.

摘要翻译： 描述了用于实现多载波通信系统的方法和装置。 描述了由不同级别的部署引起的分阶段系统部署和系统配置的各种方法。 另外，描述了可能在不同小区中具有不同级别的部署的通信系统中的移动节点和操作方法。

公开(公告)号：US20070242639A1

公开(公告)日：2007-10-18

申请号：US11487260

申请日：2006-07-14

申请人： Alexander Leonidov ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

发明人： Alexander Leonidov ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li ,  Murari Srinivasan

IPC分类号： H04B7/216

CPC分类号： H04L27/2608

摘要： Improved ways of communicating assignment signals using flash signaling are described, e.g., for wireless terminals with low SNR, that are more robust against large variation of channel gains due to e.g., frequency selective fading and fast fading in time. Coding and modulation methods and apparatus that have excellent properties against symbol erasures are described. The use of flash signaling provides an improved assignment channel having strong performance on the fading channel without compromising the performance on the AWGN channel. In one exemplary embodiment, the coding and modulation method can tolerate up to 5 erased symbols out of 8 transmitted symbols. One embodiment reduces or minimizes the sector interference on the flash assignment by improving or maximizing orthogonality between different sectors. In addition, one embodiment describes improved ways of swapping flash assignment tone-symbols in the presence other high priority signals, like sector pilots and sector null pilots.

摘要翻译： 例如，对于具有低SNR的无线终端，使用闪信号进行传送分配信号的改进方式对于由于例如频率选择性衰落和时间上的快速衰落而导致的信道增益的大变化更加鲁棒。 描述了具有针对符号擦除的优异特性的编码和调制方法和装置。 闪光信令的使用提供了在衰落信道上具有强性能的改进的分配信道，而不损害AWGN信道上的性能。 在一个示例性实施例中，编码和调制方法可以容忍8个发送的符号中多达5个擦除的符号。 一个实施例通过改善或最大化不同扇区之间的正交性来减少或最小化闪存分配上的扇区干扰。 此外，一个实施例描述了在存在其他高优先级信号（如扇区导频和扇区空导频）时交换闪存分配音调符号的改进方式。

公开(公告)号：US08213538B2

公开(公告)日：2012-07-03

申请号：US11945720

申请日：2007-11-27

申请人： Thomas Richardson ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li

发明人： Thomas Richardson ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li

IPC分类号： H04L27/04

CPC分类号： H04L5/023 ,  H04B1/713 ,  H04B7/068 ,  H04B7/0691 ,  H04L1/06 ,  H04L25/0202 ,  H04L25/4902 ,  H04L27/2604 ,  H04W52/28 ,  H04W52/325

摘要： Methods and apparatus for improving the utilization of air link resources in a wireless communications system, e.g., an OFDM MIMO system, including a base station with multiple transmit antennas are described. Superposition signaling in the downlink is employed. The superimposed signal includes a first transform result signal and a second lower power signal. The first transform result signal is generated from a first signal, which uses position modulation, e.g., including null components and high power non-null components. Different components of the first transform result signal are directed to different transmit antennas. The first transform result signal communicates information to a first wireless terminal, e.g., a weak receiver. The non-null received elements of the first transform result signal are utilized by a second wireless terminal, e.g., a superior receiver, as pilots to determine a channel estimate. The second wireless terminal uses the determined channel estimate to demodulate received second signals.

摘要翻译： 描述了在包括具有多个发射天线的基站的无线通信系统（例如OFDM MIMO系统）中改善空中链路资源的利用的方法和装置。 采用下行链路中的叠加信令。 叠加信号包括第一变换结果信号和第二较低功率信号。 第一变换结果信号从使用位置调制的第一信号产生，例如包括零分量和高功率非零分量。 第一变换结果信号的不同组件被引导到不同的发射天线。 第一变换结果信号将信息传送到第一无线终端，例如弱接收机。 第一变换结果信号的非零接收元件由第二无线终端（例如，上级接收机）用作导频以确定信道估计。 第二无线终端使用确定的信道估计来解调所接收的第二信号。

公开(公告)号：US07773703B2

公开(公告)日：2010-08-10

申请号：US11229068

申请日：2005-09-16

申请人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

发明人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

IPC分类号： H03D1/04

CPC分类号： H04L25/062 ,  H04L27/2647

摘要： Special DC tone treatment in a wireless communications system, e.g., an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit on other downlink tones. Wireless terminals measure received signal on the downlink DC tone during the time of suspended DC tone transmission, estimate self-interference and apply a correction to other received downlink DC tones. In the uplink DC tone interference is a composite of the assigned wireless terminal transmitter's baseband/RF conversion self-interference and air link noise. During one symbol interval of an N symbol interval dwell, the uplink DC tone is reserved for a special modulation symbol, which is a predetermined function of the other N-1 modulation symbols. At the base station, its receiver receives a set of modulation symbols conveyed by the uplink DC tone for a dwell, calculates the average DC component and corrects the received N-1 modulation symbols.

摘要翻译： 讨论了无线通信系统（例如，OFDM系统）中的特殊DC音调处理。 在下行链路中，无线终端接收机在来自RF /基带转换的DC音调下引入自干扰。 基站通常在下行链路DC音调下不发送，同时在其他下行链路音调上继续发送。 无线终端在暂停的直流音调传输期间测量下行链路直流音上的接收信号，估计自干扰并对其他接收的下行链路直流音调进行校正。 在上行链路中，直流音干扰是指定的无线终端发射机的基带/ RF转换自干扰和空中链路噪声的组合。 在N个符号间隔驻留的一个符号间隔期间，上行链路DC频调被保留用于作为其他N-1个调制符号的预定函数的特殊调制符号。 在基站，其接收机接收由上行链路DC频调传送的一组调制符号进行驻留，计算平均DC分量并校正接收到的N-1个调制符号。

公开(公告)号：US20070010226A1

公开(公告)日：2007-01-11

申请号：US11229348

申请日：2005-09-16

申请人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

发明人： Rajiv Laroia ,  Junyi Li ,  Hui Jin

IPC分类号： H04B1/10 ,  H04B7/00

CPC分类号： H04L27/2647 ,  H04B1/12 ,  H04L25/061

摘要： Special DC tone treatment in a wireless communications system, e.g., an OFDM system, is discussed. In the downlink, a wireless terminal receiver introduces self-interference at the DC tone from the RF/baseband conversion. A base station every so often does not transmit on the downlink DC tone while continuing to transmit on other downlink tones. Wireless terminals measure received signal on the downlink DC tone during the time of suspended DC tone transmission, estimate self-interference and apply a correction to other received downlink DC tones. In the uplink DC tone interference is a composite of the assigned wireless terminal transmitter's baseband/RF conversion self-interference and air link noise. During one symbol interval of an N symbol interval dwell, the uplink DC tone is reserved for a special modulation symbol, which is a predetermined function of the other N−1 modulation symbols. At the base station, its receiver receives a set of modulation symbols conveyed by the uplink DC tone for a dwell, calculates the average DC component and corrects the received N−1 modulation symbols.

摘要翻译： 讨论了无线通信系统（例如，OFDM系统）中的特殊DC音调处理。 在下行链路中，无线终端接收机在来自RF /基带转换的DC音调下引入自干扰。 基站通常在下行链路DC音调下不发送，同时在其他下行链路音调上继续发送。 无线终端在暂停的直流音调传输期间测量下行链路直流音上的接收信号，估计自干扰并对其他接收的下行链路直流音调进行校正。 在上行链路中，直流音干扰是指定的无线终端发射机的基带/ RF转换自干扰和空中链路噪声的组合。 在N个符号间隔驻留的一个符号间隔期间，上行链路DC频调被保留用于作为其他N-1个调制符号的预定函数的特殊调制符号。 在基站，其接收机接收由上行链路DC频调传送的一组调制符号进行驻留，计算平均DC分量并校正接收到的N-1个调制符号。