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    Adaptive thresholds for high speed downlink shared control channel (HS-SCCH) (part I) detection schemes
    13.
    发明授权
    Adaptive thresholds for high speed downlink shared control channel (HS-SCCH) (part I) detection schemes 有权
    高速下行链路共享控制信道（HS-SCCH）（第一部分）检测方案的自适应阈值

    公开(公告)号：US07680216B2

    公开(公告)日：2010-03-16

    申请号：US10408941

    申请日：2003-04-08

    申请人： Suparna Datta ,  Anand G. Dabak ,  Timothy M. Schmidl

    发明人： Suparna Datta ,  Anand G. Dabak ,  Timothy M. Schmidl

    IPC分类号： H04L25/06

    CPC分类号： H04L1/0072 ,  H03M13/3738 ,  H03M13/41 ,  H04L1/0054 ,  H04L1/0069

    摘要： A technique is provided for implementing adaptive thresholds associated with HS-SCCH detection schemes; and when applied to any HS-SCCH detection scheme, the resulting false alarm probability curves are more robust to amplitude variations of the different shared control channels. The technique has low computational complexity and low storage requirements for the estimator. Such lower complexity detection schemes have been found to outperform more complex schemes when adaptive thresholds are applied.

    摘要翻译： 提供了一种用于实现与HS-SCCH检测方案相关联的自适应阈值的技术; 并且当应用于任何HS-SCCH检测方案时，所得到的假警报概率曲线对于不同共享控制信道的幅度变化更加鲁棒。 该技术对于估计器具有低计算复杂度和低存储要求。 在应用自适应阈值时，已经发现这种较低复杂度的检测方案优于更复杂的方案。

    Multi-mode radio piconet/scatternet
    14.
    发明授权
    Multi-mode radio piconet/scatternet 有权
    多模式收音机微微网/散网

    公开(公告)号：US07502591B2

    公开(公告)日：2009-03-10

    申请号：US09942192

    申请日：2001-08-29

    申请人： Anand G. Dabak ,  Timothy M. Schmidl ,  Mohammed Nafie

    发明人： Anand G. Dabak ,  Timothy M. Schmidl ,  Mohammed Nafie

    IPC分类号： H04B7/00

    CPC分类号： H04W92/02 ,  H04W84/12 ,  H04W84/18 ,  H04W88/06

    摘要： A communication system 100 allows for heterogeneous piconets/scattenets 100 where in multiple modes 110, 112 of transmission, one of Bluetooth 110 and one or more other modes of transmission 112 are possible. While at the same time maintaining synchronization between all the different modes of transmission 110, 112 in a given piconet and across a scatternet 100. This allows for a communication device that can communicate using a plurality of transmission modes depending on the communication needs of the device.

    摘要翻译： 通信系统100允许异构微微网/散射100，其中在多模式110,112的传输，蓝牙110和一个或多个其它传输模式112之一是可能的。 同时在给定的微微网和跨网络100的同时保持所有不同的传输模式110,112之间的同步。这允许根据设备的通信需要使用多种传输模式进行通信的通信设备 。

    Reduced hopping sequences for a frequency hopping system
    15.
    发明授权
    Reduced hopping sequences for a frequency hopping system 有权
    用于跳频系统的减少跳频序列

    公开(公告)号：US07440484B2

    公开(公告)日：2008-10-21

    申请号：US09838606

    申请日：2001-04-19

    申请人： Timothy M. Schmidl ,  Anand G. Dabak ,  Mohammed Nafie ,  Oren E. Eliezer

    发明人： Timothy M. Schmidl ,  Anand G. Dabak ,  Mohammed Nafie ,  Oren E. Eliezer

    IPC分类号： H04B1/713

    CPC分类号： H04B1/7143 ,  H04B1/715 ,  H04B2001/7154 ,  H04L1/0001 ,  H04L1/12 ,  H04L5/023 ,  H04W24/00 ,  H04W28/06 ,  H04W84/20

    摘要： A frequency hopping system such as a Bluetooth system (300) can reduce the number of RF channels it hops during a normal hopping sequence cycle providing for a Reduced Hopping Sequence (RHS). A communication unit operating in the system such as the Bluetooth master unit (302) determines if any of the RF channels has interference. If any of the channels has interference, the Bluetooth master sends a message to one or more slave units (304, 306) informing them of which channels will be removed from the hopping sequence due to potential interference problems. The units will then use the new RHS for their transmissions, thus avoiding the interference problems (e.g., both avoiding interference in the system's receivers and avoiding creating interference on frequencies that are already occupied by other neighboring systems).

    摘要翻译： 诸如蓝牙系统（300）的跳频系统可以减少在针对缩减跳跃序列（RHS）的正常跳频序列周期期间跳频的RF信道的数量。 在诸如蓝牙主机单元（302）的系统中操作的通信单元确定是否有任何RF信道具有干扰。 如果任何信道具有干扰，则蓝牙主机向一个或多个从单元（304,306）发送消息，通知它们由于潜在的干扰问题而将哪些信道从跳频序列中移除。 然后，这些单元将使用新的RHS进行传输，从而避免干扰问题（例如，既避免系统接收机中的干扰，又避免在其他相邻系统已经占用的频率上产生干扰）。

    Multiuser detection for wireless communications systems in the presence of interference
    17.
    发明授权
    Multiuser detection for wireless communications systems in the presence of interference 有权
    在存在干扰的情况下对无线通信系统进行多用户检测

    公开(公告)号：US07302233B2

    公开(公告)日：2007-11-27

    申请号：US10732978

    申请日：2003-12-11

    申请人： Eko N. Onggosanusi ,  Timothy M. Schmidl ,  Anand G. Dabak

    发明人： Eko N. Onggosanusi ,  Timothy M. Schmidl ,  Anand G. Dabak

    IPC分类号： H04B17/00

    CPC分类号： H04L25/0204 ,  H04L25/0228 ,  H04L25/0244

    摘要： System and method for detecting transmissions from multiple users in a digital wireless communications system in the presence of interference. A preferred embodiment comprises derotating a received signal by a specified amount, determining channel estimates, which can include the determination of the number of users (interferers plus a desired user), and extracting information transmitted by the desired user from the received signal. Successive and parallel multiuser detection schemes are provided for extracting the information from the received signal.

    摘要翻译： 用于在存在干扰的情况下在数字无线通信系统中检测来自多个用户的传输的系统和方法。 优选实施例包括将接收到的信号扭曲指定量，确定信道估计，其可以包括确定用户数量（干扰源加上期望的用户），以及从接收到的信号中提取期望用户发送的信息。 提供了连续和并行的多用户检测方案，用于从接收信号中提取信息。

    Linear single-antenna interference cancellation receiver
    18.
    发明授权
    Linear single-antenna interference cancellation receiver 有权
    线性单天线干扰消除接收机

    公开(公告)号：US07295636B2

    公开(公告)日：2007-11-13

    申请号：US10747461

    申请日：2003-12-29

    申请人： Eko N. Onggosanusi ,  Anand G. Dabak ,  Timothy M. Schmidl

    发明人： Eko N. Onggosanusi ,  Anand G. Dabak ,  Timothy M. Schmidl

    IPC分类号： H03D1/04

    CPC分类号： H04L25/0202

    摘要： System and method for interference cancellation in a digital wireless communications system. A preferred embodiment comprises sampling a received signal wherein the received signal is real-valued, rotating the sampled received signal by a specified amount, extracting in-phase and quadrature phase streams from the rotated, sampled received signal, applying an interference suppression filter and combining the filtered streams. The output of the combining operation can be de-correlated (by whitening) if there is excessive correlation.

    摘要翻译： 数字无线通信系统中干扰消除的系统和方法。 优选实施例包括对接收信号进行采样，其中接收到的信号是实值的，将采样的接收信号旋转指定量，从旋转的采样的接收信号中提取同相和正交相位流，应用干扰抑制滤波器和组合 过滤的流。 如果存在过度的相关性，组合操作的输出可以被去相关（通过白化）。

    Wireless communications system with combining of multiple paths selected from correlation to the primary synchronization channel
    20.
    发明授权
    Wireless communications system with combining of multiple paths selected from correlation to the primary synchronization channel 有权
    无线通信系统，具有从与主同步信道相关选择的多个路径的组合

    公开(公告)号：US06829290B1

    公开(公告)日：2004-12-07

    申请号：US09669394

    申请日：2000-09-26

    申请人： Timothy M. Schmidl ,  Alan Gatherer ,  Srinath Hosur ,  Anand G. Dabak

    发明人： Timothy M. Schmidl ,  Alan Gatherer ,  Srinath Hosur ,  Anand G. Dabak

    IPC分类号： H04B169

    CPC分类号： H04B1/7115 ,  H04B1/709 ,  H04B1/7117 ,  H04B2201/70707

    摘要： A wireless receiver (UST). The receiver comprises at least one antenna (ATU) for receiving a plurality of frames (FR) in a form of a plurality of paths. Each of the plurality of frames comprises a plurality of time slots (SLN), and each of the plurality of time slots comprises a plurality of symbols. Further, each of the plurality of paths has a corresponding sample position, wherein the plurality of symbols comprise a primary synchronization code symbol (PSC). The receiver further comprises circuitry (52) for correlating a primary synchronization code across a group of the plurality of symbols, and circuitry for identifying a plurality of path positions within the group. Each of the plurality of path positions corresponds to a respective one of a plurality of largest-amplitude paths represented within the group as detected in response to the circuitry for correlating. Finally, the receiver comprises circuitry for combining (54, 58) the plurality of largest-amplitude paths in response to identification of those paths by the circuitry for identifying.

    摘要翻译： 无线接收器（UST）。 接收机包括用于接收多个路径形式的多个帧（FR）的至少一个天线（ATU）。 多个帧中的每一个包括多个时隙（SLN），并且多个时隙中的每一个包括多个符号。 此外，多个路径中的每一个具有对应的采样位置，其中多个符号包括主同步码符号（PSC）。 接收机还包括用于将多个符号组中的主同步码相互关联的电路（52）以及用于识别组内的多个路径位置的电路​​。 多个路径位置中的每一个对应于响应于用于相关的电路检测到的在组内表示的多个最大幅度路径中的相应一个路径位置。 最后，接收机包括用于响应于用于识别的电路的那些路径的识别来组合（54,58）多个最大幅度路径的电路。