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    Method and apparatus for enhancing communication reception at a wireless communication terminal
    51.
    发明授权
    Method and apparatus for enhancing communication reception at a wireless communication terminal 失效
    一种用于增强无线通信终端的通信接收的方法和装置

    公开(公告)号：US6131016A

    公开(公告)日：2000-10-10

    申请号：US920138

    申请日：1997-08-27

    申请人： Lawrence Joel Greenstein ,  Nelson Ray Sollenberger

    发明人： Lawrence Joel Greenstein ,  Nelson Ray Sollenberger

    IPC分类号： H04B7/06 ,  H04L1/06 ,  H04L27/26 ,  H04Q7/38

    CPC分类号： H04L1/06 ,  H04B7/061 ,  H04B7/0626 ,  H04L5/0023 ,  H04L5/0051 ,  H04L5/006 ,  H04L5/0091 ,  H04L2025/03414 ,  H04L2025/03426 ,  H04L2025/03802 ,  H04L25/0228 ,  H04L25/03343

    摘要： A system provides transmit diversity with feedback to enhance the reception of communication signals at a wireless communication terminal. Multiple antennae are provided at the base station. The multiple antennae transmit multi-carrier information signals such as OFDM including pilot tones. The wireless communication terminal receives the pilot tones and performs processing on those tones to detect the relationship between the information signals transmitted from the various antennae of the base station. A feedback signal, based on the comparison of the pilot tones communicates back to the base station information about the channels of the respective transmit antennae to the terminals. The base station modifies the transmission processing associated with the various transmit antennae based upon the feedback signal. The modified processing improves the reception of the information signals at the wireless communication terminal.

    摘要翻译： 系统提供具有反馈的发射分集以增强无线通信终端处的通信信号的接收。 在基站提供多个天线。 多个天线发射诸如OFDM的多载波信息信号，包括导频音调。 无线通信终端接收导频音，并对这些音调进行处理，以检测从基站的各个天线发送的信息信号之间的关系。 基于导频音的比较的反馈信号将关于各终端的各个发射天线的信道的基站信息通信回来。 基站根据反馈信号修改与各种发送天线相关联的发送处理。 经修改的处理改善了无线通信终端处的信息信号的接收。

    System and method for dynamically assigning channels for wireless packet communications
    52.
    发明授权
    System and method for dynamically assigning channels for wireless packet communications 失效
    用于动态分配无线分组通信信道的系统和方法

    公开(公告)号：US6052594A

    公开(公告)日：2000-04-18

    申请号：US846712

    申请日：1997-04-30

    申请人： Justin Che-I Chuang ,  Nelson Ray Sollenberger

    发明人： Justin Che-I Chuang ,  Nelson Ray Sollenberger

    IPC分类号： H04L12/28 ,  H04L12/56 ,  H04W24/00 ,  H04W68/00 ,  H04W72/06 ,  H04W72/08 ,  H04W72/10 ,  H04W74/00 ,  H04Q7/20

    CPC分类号： H04W72/085 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/0064 ,  H04W68/00 ,  H04W72/06 ,  H04W72/10

    摘要： A method and system for controlling media access in which a paging message is transmitted from a base station to a wireless station when a data packet is received for downlink transmission to the wireless station. The base station is one of a plurality of base stations and the wireless station is associated with the base station. In response to the paging message, a level of each of a plurality of pilot frequency signals is detected at the wireless station. Each pilot frequency corresponds to a downlink traffic channel and is transmitted by base stations to which the downlink traffic channel is assigned. The wireless station generates a list of preferred traffic channels based on a priority order of traffic channels and on detected levels of the pilot frequency signals, and transmits the list to the associated base station. A downlink traffic channel is assigned for downlink transmitting the received data packet to the wireless station based on the list of preferred traffic channels and updates a channel priority order list at the base station.

    摘要翻译： 一种用于控制媒体接入的方法和系统，其中当接收到用于下行链路传输到无线站的数据分组时，寻呼消息从基站发送到无线站。 基站是多个基站之一，无线站与基站相关联。 响应于寻呼消息，在无线站处检测多个导频信号中的每一个的电平。 每个导频对应于下行链路业务信道，并由下行业务信道被分配到的基站发送。 无线站基于业务信道的优先级顺序和导频信号的检测级别生成优选业务信道的列表，并将该列表发送到相关联的基站。 下行链路业务信道被分配用于基于优选业务信道的列表将接收到的数据分组发送到无线站的下行链路业务信道，并且更新基站处的信道优先级顺序列表。

    Tap selectable decision feedback equalizer
    53.
    发明授权
    Tap selectable decision feedback equalizer 失效
    点击可选决策反馈均衡器

    公开(公告)号：US5946351A

    公开(公告)日：1999-08-31

    申请号：US777335

    申请日：1996-12-27

    申请人： Sirikiat Ariyavisitakul ,  Nelson Ray Sollenberger

    发明人： Sirikiat Ariyavisitakul ,  Nelson Ray Sollenberger

    IPC分类号： H04L7/04 ,  H04L25/03 ,  H03H7/30 ,  H03H7/40 ,  H03K5/159

    CPC分类号： H04L25/03057 ,  H04L7/04

    摘要： A decision feedback equalizer receiver that assigns a number F of feedforward filter taps and optimizes digital receiver performance in multipath channel environments, where F is an integer less than a memory length of a radio channel. The feedforward filter taps are assigned to delay times corresponding to an optimum burst timing parameter delay time, d(0), and to F-1 time delays based on "tap SNR indices." For an Uncorrelated Inter-Symbol-Interference (UISI) case, the F-1 time delays are the first F-1 rank ordered time delays are selected as the feedforward tap delay times. For a general case, a combination of the UISI case and an analytical two cluster case is obtained by selecting the first F-2 rank ordered time delays and a 2D time delay, where D is the delay time corresponding to the largest estimated tap SNR index.

    摘要翻译： 分配前馈滤波器抽头数量F的判决反馈均衡器接收器，并且在多径信道环境中优化数字接收器性能，其中F是小于无线电信道的存储器长度的整数。 前馈滤波器抽头被分配给对应于最佳突发定时参数延迟时间d（0）的延迟时间，并分配给基于“抽头SNR指数”的F-1时间延迟。 对于不相关的符号间干扰（UISI）情况，F-1时间延迟是第一个F-1等级有序时间延迟作为前馈抽头延迟时间。 对于一般情况，通过选择第一F-2秩有序时间延迟和2D时间延迟来获得UISI情况和分析两个群集情况的组合，其中D是对应于最大估计抽头SNR指数的延迟时间 。

    Combined simulcasting and dedicated services in a wireless communication system
    55.
    发明授权
    Combined simulcasting and dedicated services in a wireless communication system 有权
    在无线通信系统中组合的联播和专用服务

    公开(公告)号：US07787407B2

    公开(公告)日：2010-08-31

    申请号：US12321555

    申请日：2009-01-22

    申请人： Zoran Kostic ,  Nelson Ray Sollenberger ,  James F. Whitehead

    发明人： Zoran Kostic ,  Nelson Ray Sollenberger ,  James F. Whitehead

    IPC分类号： H04H20/71 ,  H04J3/16 ,  H04J3/22

    CPC分类号： H04W72/005 ,  H04B7/18523 ,  H04H20/67 ,  H04L5/023 ,  H04W52/0206 ,  H04W52/0216 ,  H04W72/0446 ,  H04W84/042 ,  Y02D70/164 ,  Y02D70/26 ,  Y02D70/446

    摘要： An efficient method for providing both dedicated and simulcast services over a common wireless infrastructure is described. The services can be available to a single terminal as well as to a multiplicity of terminals simultaneously. The method uses time division multiplexing and orthogonal frequency division multiple access for simulcasting information and transmitting dedicated message information from a plurality of base stations forming a cellular pattern over the same wireless frequency channel. The method comprises the steps of constructing frames for transmission by the plurality of base stations comprising control information, simulcast information and dedicated message information within predetermined time slots of the frames and allocating the simulcast information and the dedicated message information to time slots of the same frame predetermined by the control information of the frame. The underlying modulation technology used is OFDM and thereby the channel delay-dispersion is minimized.

    摘要翻译： 描述了通过公共无线基础设施提供专用和联播服务的有效方法。 这些服务可以同时用于单个终端以及多个终端。 该方法使用时间复用和正交频分多址接入用于同播信息，并且通过同一无线频率信道从形成蜂窝模式的多个基站发送专用消息信息。 该方法包括以下步骤：在帧的预定时隙内构成包括控制信息，联播信息和专用消息信息的多个基站的帧，并将同播信息和专用消息信息分配给同一帧的时隙 由帧的控制信息预先设定。 所使用的基础调制技术是OFDM，从而最小化信道延迟分散。

    METHOD AND SYSTEM FOR REDUCTION OF PEAK-TO-AVERAGE POWER RATIO OF TRANSMISSION SIGNALS COMPRISING OVERLAPPING WAVEFORMS
    56.
    发明申请
    METHOD AND SYSTEM FOR REDUCTION OF PEAK-TO-AVERAGE POWER RATIO OF TRANSMISSION SIGNALS COMPRISING OVERLAPPING WAVEFORMS 有权
    用于减少包含重叠波形的传输信号的峰值平均功率比的方法和系统

    公开(公告)号：US20100040089A1

    公开(公告)日：2010-02-18

    申请号：US12605264

    申请日：2009-10-23

    申请人： LEONARD JOSEPH CIMINI, JR. ,  Nelson Ray Sollenberger

    发明人： LEONARD JOSEPH CIMINI, JR. ,  Nelson Ray Sollenberger

    IPC分类号： H04L27/00 ,  H04B7/00 ,  H04L27/28 ,  H04J13/00 ,  H01Q11/12

    CPC分类号： H04L27/2623 ,  H04B1/0475 ,  H04B7/2628 ,  H04B2201/70706 ,  H04L27/2614 ,  H04L27/2621

    摘要： The present invention provides a method and system for reducing the peak to average power ratio (PAP) of a signal with low computational complexity. According to one embodiment, the present invention is applied to reduce the PAP of an OFDM signal. According to an alternative embodiment, the present invention, is applied to reduce the PAP of a CDMA signal. Rather than seeking the optimum solution, which involves significant computational complexity, the present invention provides for a number of sub-optimal techniques for reducing the PAP of an OFDM signal but with much lower computational complexity. In particular, according to one embodiment utilizing the PTS approach, an iterative technique is used to assign phase factors to each of a set of partial transmit sequences from a set of possible phase factors. Experimental results using the iterative technique showed only a slight degradation (1 dB) from the optimal approach using the same number of subblocks and subcarriers. In an alternative embodiment, which avoids feedback required by the iterative approach, a sequence of phase factors are generated randomly and assigned to each of a set of partial transmit sequences. This procedure is repeated for a pre-determined number of trials and the random sequence generating the lowest PAP is selected. In a third embodiment, a set of phase factors is generated using a structured sequence such as a Walsh sequence.

    摘要翻译： 本发明提供一种降低计算复杂度低的信号的峰均功率比（PAP）的方法和系统。 根据一个实施例，本发明应用于减少OFDM信号的PAP。 根据替代实施例，本发明被应用于减少CDMA信号的PAP。 本发明不是寻求涉及大量计算复杂度的最佳解决方案，而是提供了许多用于减少OFDM信号的PAP但具有低得多的计算复杂度的次优技术。 特别地，根据利用PTS方法的一个实施例，使用迭代技术来从一组可能的相位因子将相位因子分配给一组部分发送序列中的每一个。 使用迭代技术的实验结果显示，使用相同数量的子块和子载波的最优方法仅显示轻微的退化（1 dB）。 在避免迭代方法所需的反馈的替代实施例中，随机产生一系列相位因子并分配给一组部分发送序列中的每一个。 对于预定数量的试验重复该过程，并且选择产生最低PAP的随机序列。 在第三实施例中，使用诸如沃尔什序列的结构化序列来生成一组相位因子。