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    Spread spectrum receiver and related method
    235.
    发明申请
    Spread spectrum receiver and related method 有权
    扩频接收机及相关方法

    公开(公告)号：US20020039381A1

    公开(公告)日：2002-04-04

    申请号：US10003058

    申请日：2001-11-02

    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

    Inventor： Saul R. Dooley ,  Andrew T. Yule ,  Martin S. Wilcox

    IPC: H04K001/00 ,  H04B015/00 ,  H04L027/30

    CPC classification number: H04B1/70758 ,  H04B2001/70706 ,  H04B2201/7071

    Abstract: A method and apparatus (1A) for receiving a spread spectrum signal at a mobile communications terminal, including the step of processing the signal for the purposes of signal acquisition and signal tracking, monitoring movement of the mobile terminal and deriving a signal indicative of a characteristic of movement of the mobile terminal, and further including changing the mode of the processing of the incoming spectrum signal in response to the signal indicating the said characteristic of movement of the mobile terminal.

    Abstract translation: 一种用于在移动通信终端处接收扩展频谱信号的方法和装置（1A），包括为了信号采集和信号跟踪而处理信号的步骤，监测移动终端的移动并导出指示特征的信号 并且还包括响应于指示移动终端的所述移动特性的信号来改变输入频谱信号的处理模式。

    Radio frequency communication network having adaptive communication parameters
    238.
    发明申请
    Radio frequency communication network having adaptive communication parameters 审中-公开
    具有自适应通信参数的射频通信网络

    公开(公告)号：US20010050943A1

    公开(公告)日：2001-12-13

    申请号：US09799340

    申请日：2001-03-05

    Inventor： Ronald L. Mahany

    IPC: H04B001/69

    CPC classification number: H04L1/0001 ,  H04B1/69 ,  H04B1/707 ,  H04B1/713 ,  H04B17/0085 ,  H04B17/318 ,  H04B2201/7071 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0014 ,  H04L1/0025 ,  H04L1/0071 ,  H04L1/0075 ,  H04L29/06 ,  H04L69/24 ,  H04W28/06 ,  H04W28/065 ,  H04W28/18

    Abstract: Improved apparatus for a radio communication network having a multiplicity of mobile transceiver units selectively in communication with a plurality of base transceiver units which communicate with one or two host computers for storage and manipulation of data collected by bar code scanners or other collection means associated with the mobile transceiver units. The radio network is adaptive in that in order to compensate for the wide range of operating conditions a set of variable network parameters are exchanged between transceivers in the network. These parameters define optimized communication on the network under current network conditions. Examples of such parameters include: the length and frequency of the spreading code in direct-sequence spread spectrum communications; the hop frame length, coding, and interleaving in frequency-hopping spread spectrum communications; the method of source encoding used; and the data packet size in a network using data segmentation. The invention is preferably to be applicable as an upgrade of an existing data capture system wherein a large number of hand-held transceiver units operate over an extensive area to gather data in various places, requiring the use of multiple base stations. In a variety of such installations such as warehouse facilities, distribution centers, and retail establishments, it may be advantageous to utilize not only multiple bases capable of communication with a single host, but with multiple hosts as well.

    Abstract translation: 一种用于无线电通信网络的改进装置，其具有选择性地与多个基站收发器单元通信的多个移动收发机单元，所述多个基站收发器单元与一个或两个主计算机通信，用于存储和操纵由条形码扫描器或与其相关联的其他收集装置收集的数据 移动收发单元。 无线网络是适应性的，为了补偿广泛的操作条件，在网络中的收发器之间交换一组可变网络参数。 这些参数定义了当前网络条件下网络上的优化通信。 这些参数的示例包括：直接序列扩频通信中的扩展码的长度和频率; 跳频扩频通信中的跳帧长度，编码和交织; 使用源编码的方法; 以及使用数据分段的网络中的数据分组大小。 本发明优选地适用于现有数据采集系统的升级，其中大量手持式收发器单元在广泛的区域上操作以在需要使用多个基站的各个地方收集数据。 在诸如仓库设施，配送中心和零售机构的各种这样的安装中，可能有利的是不仅利用能够与单个主机通信的多个基站，而且利用多个主机。

    Reverse link correlation filter in wireless communication systems
    239.
    发明申请
    Reverse link correlation filter in wireless communication systems 有权
    无线通信系统中的反向链路相关滤波器

    公开(公告)号：US20010030990A1

    公开(公告)日：2001-10-18

    申请号：US09738934

    申请日：2000-12-15

    Applicant: TANTIVY Communications Inc.

    Inventor： Antoine J. Rouphael ,  John E. Hoffmann ,  George Rodney Nelson JR. ,  Samir K. Patel ,  James A. Proctor JR. ,  Daniel I. Riley

    IPC: H04K001/00 ,  H04B015/00 ,  H04L027/30

    CPC classification number: H04B1/707 ,  H04B1/7105 ,  H04B1/712 ,  H04B2201/70703 ,  H04B2201/70705 ,  H04B2201/7071

    Abstract: A single, common correlation filter (CF) core is provided in a wireless system using CDMA. A plurality of channels with different data rates are provided in the wireless system. The channels provided in the wireless system include the access channel, the maintenance channel, and the traffic channel in which information (e.g., pilot or data symbols or both) is transmitted at the tier 1, tier 2 and tier 3 rates. The data rate for transmitting the information is programmable by digital signal processor (DSP). A user-unique code, such as a PN code, is applied to the information being transmitted in the channels of the wireless system. The information is QPSK modulated and transmitted in any one of the channels at any data rate. The transmitted information is correlated at the smallest data rate (i.e., the tier 1 rate) in the correlation filter (CF) of the wireless system by time multiplexing delayed versions of the PN code to the correlation filter core. The correlated information is then demultiplexed and pilot aided QPSK demodulated. The demodulated information is summed at the proper integer multiple of the tier 1 rate to achieve the tier 2 and tier 3 rates. The three strongest multipaths (in terms of the received power) are selected in a window or time period for optimal information recovery. Furthermore, three outputs from the demodulated information can be provided and combined for temporal diversity. Spatial diversity is achieved by providing a plurality of antennas at each receiver and a single, common correlation filter at each of the plurality of antennas of the receivers in the wireless system.

    Abstract translation: 在使用CDMA的无线系统中提供单个公共相关滤波器（CF）核。 在无线系统中提供具有不同数据速率的多个信道。 在无线系统中提供的信道包括接入信道，维护信道和业务信道，信道（例如，导频或数据符号或两者）以层1，层2和层3速率被传输。 用于传输信息的数据速率可由数字信号处理器（DSP）编程。 诸如PN码的用户唯一码被应用于在无线系统的频道中发送的信息。 该信息以任何数据速率在任何一个信道中进行QPSK调制和传输。 所发送的信息通过将PN码的延迟版本时间复用到相关滤波器核心，以无线系统的相关滤波器（CF）中的最小数据速率（即，层1速率）相关。 然后将相关信息解复用并进行导频辅助QPSK解调。 解调信息以1级速率的适当整数倍相加，以实现2级和3级速率。 在窗口或时间段中选择三个最强的多路径（以接收功率计），以获得最佳信息恢复。 此外，可以提供来自解调信息的三个输出并将其组合用于时间分集。 通过在每个接收机处提供多个天线以及在无线系统中的接收机的多个天线的每个天线处提供单个公共相关滤波器来实现空间分集。

    Integrated beamforming/rake/mud CDMA receiver architecture
    240.
    发明申请
    Integrated beamforming/rake/mud CDMA receiver architecture 失效
    集成波束成形/耙/泥CDMA接收机架构

    公开(公告)号：US20010028675A1

    公开(公告)日：2001-10-11

    申请号：US09778854

    申请日：2001-02-08

    Inventor： Scott Bierly ,  Marc Harlacher ,  Robert Smarrelli ,  Aaron Weinberg

    IPC: H04K001/00

    CPC classification number: H04B1/708 ,  H04B1/7093 ,  H04B1/7117 ,  H04B2001/70706 ,  H04B2201/7071

    Abstract: A spread-spectrum demodulator architecture is presented which utilizes parallel processing to accomplish rapid signal acquisition with simultaneous tracking of multiple channels, while implementing an integrated multi-element adaptive beamformer, Rake combiner, and multi-user detector (MUD). A matched filter computational architecture is utilized, in which common digital arithmetic elements are used for both acquisition and tracking purposes. As each channel is sequentially acquired by the parallel matched filter, a subset of the arithmetic elements are then dedicated to the subsequent tracking of that channel. Additionally, multiple data inputs and delay lines are present, connecting the sampled baseband data streams of numerous RF bands and antenna elements with the arithmetic elements. The matched filter/despreader processing is virtually independent of channel origin or utilization; e.g., CDMA users, RF bands, beamformer elements, or Rake Fingers. Integration of the beamformer weighting computation with the demodulator results in substantial savings by sharing the existing circuitry performing carrier tracking and AGC. An optimal demodulator solution can be achieved through unified nullspace/timenull processing, by providing all observables (element snapshots, Rake Fingers, carrier/symbol SNR/phase, etc.), for multiple channels, to a single adaptive algorithm processor that can beamform, Rake, and perform joint detection (MUD).

    Abstract translation: 提出了一种扩频解调器架构，其采用并行处理来实现多个信道同时跟踪的快速信号采集，同时实现集成多元自适应波束形成器Rake组合器和多用户检测器（MUD）。 使用匹配滤波器计算体系结构，其中通用数字算术元件用于采集和跟踪目的。 当每个通道由并行匹配滤波器顺序地获取时，算术元件的子集然后被专用于该通道的后续跟踪。 此外，存在多个数据输入和延迟线，将多个RF频带的采样基带数据流和天线元件与算术元件连接。 匹配的滤波器/解扩器处理实际上与信道起始或利用无关; 例如CDMA用户，RF频带，波束形成器元件或者Rake Fingers。 波束形成器加权计算与解调器的集成通过共享执行载波跟踪和AGC的现有电路实现了显着的节省。 通过统一的“空间/时间”处理，可以通过为多个通道提供所有可观察（元素快照，Rake Fingers，载波/符号SNR /相位等））到单个自适应算法处理器来实现最佳解调器解决方案， beamform，Rake，并进行联合检测（MUD）。

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