公开(公告)号：US07376209B2

公开(公告)日：2008-05-20

申请号：US10456148

申请日：2003-06-06

申请人： June Namgoong ,  Jun Ma ,  Mingxi Fan ,  Naga Bhushan ,  Peter Black

发明人： June Namgoong ,  Jun Ma ,  Mingxi Fan ,  Naga Bhushan ,  Peter Black

IPC分类号： H03D1/00 ,  H04L27/06

CPC分类号： H03M13/3927 ,  H03M13/2957 ,  H03M13/658 ,  H04L1/0045 ,  H04L1/0066 ,  H04L1/1812 ,  H04L1/1825 ,  Y10S370/912

摘要： A method and an apparatus for scaling demodulated data symbols contained in a packet to generate scaled log-likelihood ratios for Turbo decoding are disclosed. A packet consists of one or more subpackets depending on the type of packet. Each subpacket is identified by a subpacket identification number. The payload size of the packet and the subpacket identification number may be determined by decoding a reverse rate indicator (RRI) channel. A scale factor which is associated with a specific subpacket identification number and a specific payload size results in a performance measure that is closest to an expected performance measure. The scale factor is used for scaling the demodulated data symbols to generate scaled log-likelihood ratios for Turbo decoding.

摘要翻译： 公开了一种用于缩放分组中包含的解调数据符号以产生用于Turbo解码的缩放对数似然比的方法和装置。 数据包由一个或多个子数据包组成，具体取决于数据包的类型。 每个子分组由子分组标识号码标识。 可以通过解码反向速率指示符（RRI）信道来确定分组的有效载荷大小和子分组标识号码。 与特定子分组标识号和特定有效载荷大小相关联的比例因子导致最接近预期性能测量的性能度量。 缩放因子用于缩放解调的数据符号以产生用于Turbo解码的缩放的对数似然比。

公开(公告)号：US20080008136A1

公开(公告)日：2008-01-10

申请号：US11858840

申请日：2007-09-20

申请人： Roberto Padovani ,  Peter Black ,  Nagabhushana Sindhushayana

发明人： Roberto Padovani ,  Peter Black ,  Nagabhushana Sindhushayana

IPC分类号： H04J3/00

CPC分类号： H04B7/2687 ,  H04B1/707 ,  H04B2201/70701 ,  H04J3/0644 ,  H04W52/325

摘要： A pilot reference transmission scheme well suited for high data rate wireless communication systems is disclosed. To maximize the amount of interference from transmissions from neighboring transmission sources (e.g., access points or base stations) during the pilot interval, and hence minimize the amount of interference from non-transmitting sources during the data intervals, the pilot references are transmitted in bursts at predetermined time intervals, and the pilot bursts from the access points are synchronized. This results in maximum interference contributions from non-transmitting neighboring access points, facilitating reliable estimation of worst case carrier-to-interference (C/I), and further allows the receiving devices (e.g., access terminals) to easily recognize the bursts as pilot reference. In one embodiment, each access point transmits the pilot bursts at or near its maximum transmit power level and no user-specific data is transmitted during the pilot bursts.

摘要翻译： 公开了一种非常适合高数据速率无线通信系统的导频参考传输方案。 为了在导频间隔期间使来自相邻传输源（例如，接入点或基站）的传输的干扰量最大化，并且因此在数据间隔期间最小化来自非发射源的干扰量，导频参考以突发 并且来自接入点的导频突发是同步的。 这导致来自非发射相邻接入点的最大干扰贡献，促进对最差情况下的载波干扰（C / I）的可靠估计，并且还允许接收设备（例如，接入终端）容易地将突发识别为导频 参考。 在一个实施例中，每个接入点在其最大发射功率电平处或其附近发射导频脉冲串，并且在导频突发期间不发送用户特定数据。

公开(公告)号：US20070060165A1

公开(公告)日：2007-03-15

申请号：US11486513

申请日：2006-07-13

申请人： Peter Black ,  Rashid Attar ,  Ramin Rezaiifar ,  Parag Agashe ,  Mingxi Fan ,  Roberto Rimini ,  Jun Ma

发明人： Peter Black ,  Rashid Attar ,  Ramin Rezaiifar ,  Parag Agashe ,  Mingxi Fan ,  Roberto Rimini ,  Jun Ma

IPC分类号： H04Q7/20

CPC分类号： H04B7/264 ,  H04L1/16 ,  H04L5/023

摘要： A method and system for providing asymmetric modes of operation in multi-carrier wireless communication systems. A method may assign a long code mask (LCM) to an information channel associated with a plurality of forward link carriers to transmit data from an access network to an access terminal; and multiplex the information channel on a reverse link carrier. The information channel may include one of data source channel (DSC), data rate control (DRC) and acknowledgment (ACK) information, and the multiplexing may be code division multiplexing (CDM). The AN may instruct the AT on whether to multiplex the DSC information based on feedback from the AT. The method may further offset the ACK information on the reverse link to reduce the reverse link peak to average, CDM the information channel on an I-branch and on a Q-branch, and transmit the code division multiplexed information channel on the reverse link carrier.

摘要翻译： 一种用于在多载波无线通信系统中提供不对称操作模式的方法和系统。 方法可以将长码掩码（LCM）分配给与多个前向链路载波相关联的信息信道，以将数据从接入网络传输到接入终端; 并在反向链路载波上复用信息信道。 信息信道可以包括数据源信道（DSC），数据速率控制（DRC）和确认（ACK）信息之一，并且复用可以是码分复用（CDM）。 AN可以根据AT的反馈来指示AT是否复用DSC信息。 该方法还可以抵消反向链路上的ACK信息，以减少反向链路峰值平均，CDM在I分支和Q分支上的信道，并在反向链路载波上发送码分多路复用信息信道 。

公开(公告)号：US20060146918A1

公开(公告)日：2006-07-06

申请号：US11368115

申请日：2006-03-03

申请人： Peter Black ,  Nagabhushana Sindhushayana

发明人： Peter Black ,  Nagabhushana Sindhushayana

IPC分类号： H04B1/707

CPC分类号： H04B7/082 ,  H03L7/089 ,  H03L7/091 ,  H03L7/093

摘要： Techniques for deriving sample timing for multiple signal instances received on multiple antennas for a given propagation path. In one scheme, a DLL is maintained for each path, and each DLL tracks the timing of the best signal instance for the assigned path. In another scheme, a DLL is maintained for each path, and each DLL tracks the average timing of the multiple signal instances for the assigned path. To reduce timing jitter, the SINR of a signal instance may be estimated for a number of different time offsets. The loop filter for the DLL is initially updated in the normal manner. If a change in the time offset used for the sample timing is detected, then the SINRs for the new and prior offsets are compared. The new time offset is used if the associated SINR is better. Otherwise, the prior time offset is retained and used.

公开(公告)号：US20060050743A1

公开(公告)日：2006-03-09

申请号：US11216872

申请日：2005-08-30

申请人： Peter Black ,  Rohit Kapoor ,  Serafin Spindola ,  Mehmet Yavuz

发明人： Peter Black ,  Rohit Kapoor ,  Serafin Spindola ,  Mehmet Yavuz

IPC分类号： H04J3/06

CPC分类号： H04L12/66 ,  G10L19/005 ,  H04J3/0632 ,  H04L29/06027 ,  H04L47/10 ,  H04L47/2416 ,  H04L47/28 ,  H04L47/29 ,  H04L47/30 ,  H04L49/90 ,  H04L49/9094 ,  H04L65/80

摘要： Adaptive De-Jitter Buffer for Voice over IP (VoIP) for packet switch communications. The de-jitter buffer methods and apparatus presented avoid playback of underflows while balancing end-to-end delay. In one example, the de-jitter buffer is recalculated at the beginning of each talkspurt. In another example, talkspurt packets are compressed upon receipt of all remaining packets.

摘要翻译： 用于分组交换通信的用于IP语音（VoIP）的自适应去抖动缓冲器。 所提供的去抖动缓冲器方法和装置避免了下溢的重放，同时平衡了端到端延迟。 在一个示例中，在每个话音突峰的开始处重新计算去抖动缓冲器。 在另一个示例中，在接收到所有剩余的分组时，话音分组被压缩。

公开(公告)号：US20080080363A1

公开(公告)日：2008-04-03

申请号：US11940757

申请日：2007-11-15

申请人： Peter Black ,  Gadi Karmi ,  Nagabhushana Sindhushayana

发明人： Peter Black ,  Gadi Karmi ,  Nagabhushana Sindhushayana

IPC分类号： H04J11/00

CPC分类号： H04L1/0038 ,  H04B1/707 ,  H04B2201/70701 ,  H04B2201/70703 ,  H04J13/00 ,  H04J13/0048 ,  H04J13/10 ,  H04L1/0003 ,  H04L1/0025 ,  H04L1/08

摘要： A variable rate transmission system transmits a variable rate data packet including an accompanying rate indication signal indicative of the transmission rate of the variable data packet. The data packet can be spread using a long pseudonoise (PN) code, the mask of which can be selected in accordance with the transmission rate of the variable rate data packet. A preamble, providing the transmission rate, can be punctured into an outgoing pilot signal. The rate indication signal can be encoded in accordance with a set of orthogonal functions that are part of the indication of the transmission rate of the data packet.

摘要翻译： 可变速率传输系统发送包括指示可变数据分组的传输速率的伴随速率指示信号的可变速率数据分组。 可以使用长的伪噪声（PN）码扩展数据分组，其可以根据可变速率数据分组的传输速率来选择其掩码。 提供传输速率的前导码可以被打孔到输出导频信号中。 速率指示信号可以根据作为数据分组的传输速率的指示的一部分的一组正交函数进行编码。

公开(公告)号：US20080032740A1

公开(公告)日：2008-02-07

申请号：US11871638

申请日：2007-10-12

申请人： Abhay Joshi ,  James Hutchison ,  Peter Black ,  Simon Turner ,  Thunyachate Ekvetchavit

发明人： Abhay Joshi ,  James Hutchison ,  Peter Black ,  Simon Turner ,  Thunyachate Ekvetchavit

IPC分类号： H04B1/38 ,  H04M1/00

CPC分类号： H04W48/18 ,  H04W88/06 ,  Y02D70/1224

摘要： Techniques to efficiently attempt acquisition of a packet data system (e.g., an IS-856 system). If a terminal has acquired one or more channels in a voice/data system (e.g., an IS-2000 system), then it can attempt acquisition on channels in the packet data system that are co-located with the acquired channels in the voice/data system. Multiple acquisition modes may be used, and on-going acquisition attempts on the co-located channels may be performed using one acquisition mode at a time in order to reduce power consumption. Acquisition attempts may be performed in a “ping-pong” manner to improve the likelihood of acquisition. For a ping-pong search, an acquisition attempt is made on the most recently acquired channel prior to an acquisition attempt on each of the remaining channels. Received signal strength estimates may also be obtained for selected channels and may be used to determine whether or not to attempt acquisition on these channels.

摘要翻译： 有效地尝试采集分组数据系统（例如，IS-856系统）的技术。 如果终端已经在语音/数据系统（例如，IS-2000系统）中获取了一个或多个信道，则它可以尝试在分组数据系统中与语音/数据系统中所获取的信道共同位置的信道上的采集， 数据系统 可以使用多个采集模式，并且可以一次使用一个采集模式来执行同位置信道上的持续采集尝试，以便降低功耗。 收购尝试可以以“乒乓”方式进行，以提高获取的可能性。 对于乒乓搜索，在对每个剩余通道进行采集尝试之前，在最近获取的通道上进行采集尝试。 也可以对所选择的信道获得接收的信号强度估计，并且可以用于确定是否尝试在这些信道上进行采集。

公开(公告)号：US20070142074A1

公开(公告)日：2007-06-21

申请号：US11313320

申请日：2005-12-21

申请人： Peter Black ,  Mingxi Fan ,  Yeliz Tokgoz

发明人： Peter Black ,  Mingxi Fan ,  Yeliz Tokgoz

IPC分类号： H04B7/00 ,  H04M1/00

CPC分类号： H04B7/061 ,  H01Q3/24 ,  H01Q3/26 ,  H04B7/022 ,  H04B7/0404 ,  H04B7/0617 ,  H04B7/0623 ,  H04B7/0854 ,  H04B17/24 ,  H04W52/325 ,  H04W52/40 ,  H04W52/42

摘要： A method and system for reverse link transmit beam-forming. One method comprises using a plurality of antennas at an access terminal to wirelessly transmit signals to one or more base stations; receiving an input indicating a reverse link signal quality at the one or more base stations; and adjusting at least one of a gain and a phase of a signal to be transmitted on one or more antennas. The input may be a reverse power control (RPC) value sent from one or more base stations or a measurement of the closed-loop pilot transmit power.

摘要翻译： 反向链路发射波束形成的方法和系统。 一种方法包括在接入终端处使用多个天线将信号无线地发送到一个或多个基站; 在所述一个或多个基站处接收指示反向链路信号质量的输入; 以及调整要在一个或多个天线上发送的信号的增益和相位中的至少一个。 输入可以是从一个或多个基站发送的反向功率控制（RPC）值或闭环导频发射功率的测量。

公开(公告)号：US20070127374A1

公开(公告)日：2007-06-07

申请号：US11555075

申请日：2006-10-31

申请人： Peter Black

发明人： Peter Black

IPC分类号： H04L12/26 ,  H04L5/16

CPC分类号： H04L65/4038 ,  H04L12/1822 ,  H04L12/189 ,  H04L29/06027 ,  H04N7/141 ,  H04N21/41407 ,  H04N21/6131 ,  H04N21/6181 ,  H04N21/6405 ,  H04W4/06

摘要： A system and method for providing group communication services is disclosed. Each of a plurality of group communication devices coverts media, such as video, audio, image and/or data into data packets suitable for transmission over a data network, such as the Internet. The data packets are selectively transmitted through the data network to a communications manager. The communications manager acts as a configurable switch, allowing communications from any communication device to be selectively routed to the plurality of communication devices based on the types of the communication devices and/or the requests received from the corresponding users. The communications manager further allows users of other communication systems and devices to participate in group communications with each other.

摘要翻译： 公开了一种用于提供组通信服务的系统和方法。 多个组通信设备中的每一个将诸如视频，音频，图像和/或数据的媒体覆盖成适合于诸如因特网的数据网络传输的数据分组。 选择性地通过数据网络将数据分组传送到通信管理器。 通信管理器用作可配置交换机，允许来自任何通信设备的通信基于通信设备的类型和/或从相应用户接收到的请求而选择性地路由到多个通信设备。 通信管理器还允许其他通信系统和设备的用户彼此参与群组通信。

公开(公告)号：US20060062322A1

公开(公告)日：2006-03-23

申请号：US11047347

申请日：2005-01-28

申请人： June Namgoong ,  Hao Xu ,  Peter Black ,  Srikant Jayaraman

发明人： June Namgoong ,  Hao Xu ,  Peter Black ,  Srikant Jayaraman

IPC分类号： H04B15/00 ,  H04K1/10 ,  H04L27/28

CPC分类号： H04L1/20 ,  H04B1/1027 ,  H04L27/2647

摘要： Noise variance estimation in wireless communications. Noise variance estimation includes receiving a signal including an OFDM symbol having, in-band tones including in-band pilot tones, and band-edge tones including band-edge pilot tones and guard tones, estimating an effective noise variance for the in-band tones using the in-band pilot tones and channel estimates for the in-band pilot tones, and estimating an effective noise variance for the band-edge tones using the band-edge pilot tones, channel estimates for the band-edge pilot tones, and the guard tones.

摘要翻译： 无线通信中的噪声方差估计。 噪声方差估计包括接收包括具有包括带内导频音频的带内音调和包括带边导频音和保护音的带边音调的OFDM符号的信号，估计带内音调的有效噪声方差 使用带内导频音调和频带内导频音调的估计，以及使用带边导频音估计带边音调的有效噪声方差，对带边导频音进行信道估计，以及 守卫色调。