公开(公告)号：US06816473B2

公开(公告)日：2004-11-09

申请号：US09791025

申请日：2001-02-21

Applicant: Fatih M. Ozluturk ,  Gary R. Lomp ,  John Kowalski

Inventor： Fatih M. Ozluturk ,  Gary R. Lomp ,  John Kowalski

IPC: H04B7216

CPC classification number: G06F13/374 ,  H03H17/0226 ,  H03H17/06 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70754 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/708 ,  H04B1/7085 ,  H04B1/709 ,  H04B1/7093 ,  H04B1/711 ,  H04B1/7115 ,  H04B1/712 ,  H04B7/2637 ,  H04B7/264 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/70707 ,  H04B2201/7071 ,  H04J13/00 ,  H04J13/10 ,  H04J13/12 ,  H04J13/16 ,  H04J2013/0037 ,  H04L1/0001 ,  H04L1/004 ,  H04L1/0042 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0059 ,  H04L5/1446 ,  H04L25/0212 ,  H04L27/206 ,  H04L27/2332 ,  H04L2027/003 ,  H04L2027/0053 ,  H04N1/00912 ,  H04N1/3333 ,  H04N2201/3335 ,  H04W52/04 ,  H04W52/08 ,  H04W52/143 ,  H04W52/146 ,  H04W52/24 ,  H04W52/241 ,  H04W52/245 ,  H04W52/247 ,  H04W52/26 ,  H04W52/262 ,  H04W52/322 ,  H04W52/325 ,  H04W52/343 ,  H04W52/346 ,  H04W52/36 ,  H04W52/367 ,  H04W52/44 ,  H04W52/50 ,  H04W52/52 ,  H04W52/54 ,  H04W52/60

Abstract: A code-division-multiple-access (CDMA) system employing spread-spectrum modulation. The CDMA system has a base station (BS), and a plurality of subscriber units. The signals transmitted between the base station and subscriber unit use spread-spectrum modulation. The improvement method for adaptive forward power control (APC) from a base station (BS) to a subscriber unit (SU), comprises the steps of sending from the base station, using spread-spectrum modulation, a BS-spreading code on a forward channel. The subscriber unit despreads the BS-spreading code on the forward channel as a despread signal, determines a first power level Pd which includes power of the despread signal plus noise and a second power level PN, which includes despread-noise power. The subscriber unit determines a first error signal e1, from the first power level Pd, the second power level PN, and a required signal-to-noise ratio SNRREQ for service type, and a second error signal e2, from a measure of total received power Pr and an automatic gain control (AGC) set point Po. The subscriber unit forms a combined error signal from the first error signal e1, the second error signal e2, a first weight a1 and a second weight a2, and hard limits the combined error signal to form a single APC bit. The APC bit is transmitted to the base station. In response to the APC bit, the base station adjusts transmitter power to the subscriber unit.

Abstract translation: 采用扩频调制的码分多址（CDMA）系统。 CDMA系统具有基站（BS）和多个用户单元。 在基站和用户单元之间传输的信号使用扩频调制。 从基站（BS）到用户单元（SU）的自适应前向功率控制（APC）的改进方法包括以下步骤：使用扩频调制从前向基站发送BS扩展码 渠道。 用户单元将前向信道上的BS扩展码解扩展为解扩信号，确定包括解扩信号加噪声功率的第一功率电平Pd和包括解扩噪声功率的第二功率电平PN。 订户单元从服务类型的第一功率电平Pd，第二功率电平PN和所需的信噪比SNRREQ以及来自所接收总数的测量的第二误差信号e2确定第一误差信号e1 功率Pr和自动增益控制（AGC）设定点Po。 订户单元形成来自第一误差信号e1，第二误差信号e2，第一权重a1和第二权重a2的组合误差信号，并且硬限制组合误差信号以形成单个APC比特。 APC位被传送到基站。 响应于APC位，基站调整发射机功率给用户单元。

公开(公告)号：US20040203557A1

公开(公告)日：2004-10-14

申请号：US10280749

申请日：2002-10-25

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： Yifeng Zhang

IPC: H04Q007/20 ,  H04M011/00 ,  H04M001/00 ,  H04B001/38

CPC classification number: H04B1/406 ,  H04B2201/7071 ,  H04L27/0008

Abstract: A transmitter and/or receiver includes a single crystal clock oscillator circuit and a sample rate converter (SRC) that selectively generates samples at an alternative frequency for subsequent transmission or decoding. A 40 MHz crystal provides the clock signal for the digital-to-analog and analog-to-digital converters that are used to convert the samples to and from analog form. In an IEEE 802.11-compatible embodiment, the 802.11a compatible 20 MHz OFDM samples are converted to and from analog form directly, whereas a sample rate converter converts the 802.11b compatible 22 MHz DSSS samples to and from 40 MHz samples to provide compatibility with the 40 MHz analog conversions.

Abstract translation: 发射机和/或接收机包括单晶时钟振荡器电路和采样率转换器（SRC），其选择性地以替代频率产生样本用于随后的传输或解码。 40 MHz晶体为数模转换器和模数转换器提供时钟信号，用于将样本转换为模拟形式和从模拟形式转换。 在IEEE 802.11兼容实施例中，802.11a兼容的20MHz OFDM样本直接从模拟形式转换，而采样率转换器将802.11b兼容的22MHz DSSS样本转换为40MHz样本，并提供与40MHz样本的兼容性 40 MHz模拟转换。

公开(公告)号：US06801564B2

公开(公告)日：2004-10-05

申请号：US09738934

申请日：2000-12-15

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

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

IPC: H04B1500

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。

公开(公告)号：US06778840B2

公开(公告)日：2004-08-17

申请号：US10210961

申请日：2002-08-02

Applicant: Fatih M. Ozluturk ,  Gary R. Lomp

Inventor： Fatih M. Ozluturk ,  Gary R. Lomp

IPC: H04Q720

CPC classification number: H04W52/36 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/708 ,  H04B7/2628 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/7071 ,  H04W52/367 ,  H04W52/50 ,  H04W52/60

Abstract: A method of controlling transmission power during the establishment of a channel in a CDMA communication system utilizes the transmission of a short code from a subscriber unit to a base station during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional spreading code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The subscriber unit quickly increases transmission power while repeatedly transmitting the short code until the signal is detected by the base station. Once the base station detects the short code, it sends an indication to the subscriber unit to cease increasing transmission power. The use of short codes limits power overshoot and interference to other subscriber units and permits the base station to quickly synchronize to the spreading code used by the subscriber unit.

Abstract translation: 在CDMA通信系统中建立信道期间控制发射功率的方法利用在初始功率提升期间从用户单元向基站传输短码。 短码是用于基站检测的序列，其具有比常规扩展码短得多的周期。 斜坡上升从低于基站检测所需功率电平的功率电平开始。 用户单元快速增加发射功率，同时重复发送短码直到基站检测到信号。 一旦基站检测到短码，它就向用户单元发送指示，以停止增加发射功率。 使用短码限制了其他用户单元的功率过冲和干扰，并允许基站快速同步到用户单元使用的扩展码。

公开(公告)号：US20040151233A1

公开(公告)日：2004-08-05

申请号：US10746535

申请日：2003-12-23

Applicant: LG Electronics Inc.

Inventor： Kyung Ho Lee

IPC: H04B001/707

CPC classification number: H04B1/711 ,  H04B1/7117 ,  H04B2201/7071

Abstract: A system and method for allocating a search resource of a base station modem is provided. The system comprises search controlling means for receiving an allocated search resource and searching a multi-path of a radio channel to produce a search result; measuring means for measuring mobility of a terminal based on the search result; and allocating means for adaptively allocating a common search resource to the search controlling means based on a measure of mobility of the terminal.

Abstract translation: 提供了一种用于分配基站调制解调器的搜索资源的系统和方法。 该系统包括搜索控制装置，用于接收分配的搜索资源并搜索无线电频道的多路径以产生搜索结果; 用于基于搜索结果测量终端的移动性的测量装置; 以及分配装置，用于基于终端的移动性的度量自适应地将搜索资源分配给搜索控制装置。

公开(公告)号：US06760365B2

公开(公告)日：2004-07-06

申请号：US10267512

申请日：2002-10-09

Applicant: Alpaslan Demir ,  Faith M. Ozluturk

Inventor： Alpaslan Demir ,  Faith M. Ozluturk

IPC: H04B1707

CPC classification number: H04B1/708 ,  H04B1/70735 ,  H04B1/7077 ,  H04B1/7093 ,  H04B2201/7071

Abstract: A User Equipment (UE) has a circuit that performs the acquisition for the low chip rate option of the Universal Mobile Telecommunication System (UMTS) Time Division Duplex (TDD) standard as formulated by the Third Generation Partnership Project (3GPP). The present invention implements the detection of the basic SYNC code; the determination of the midamble used and the detection of the superframe timing based on SYNC code modulation sequence. This enables reading of a full Broadcast Channel (BCH) message.

公开(公告)号：US06721301B2

公开(公告)日：2004-04-13

申请号：US09765016

申请日：2001-01-18

Applicant: Fatih M. Ozluturk ,  Gary R. Lomp

Inventor： Fatih M. Ozluturk ,  Gary R. Lomp

IPC: H04B7216

CPC classification number: H04B7/2637 ,  G06F13/374 ,  H03H17/0226 ,  H03H17/06 ,  H04B1/707 ,  H04B1/7075 ,  H04B1/70753 ,  H04B1/70754 ,  H04B1/70755 ,  H04B1/70758 ,  H04B1/7077 ,  H04B1/708 ,  H04B1/7085 ,  H04B1/709 ,  H04B1/7093 ,  H04B1/711 ,  H04B1/7115 ,  H04B1/712 ,  H04B7/2628 ,  H04B7/264 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/70707 ,  H04B2201/7071 ,  H04J13/00 ,  H04J13/004 ,  H04J13/0048 ,  H04J13/0077 ,  H04J13/10 ,  H04J13/107 ,  H04J13/12 ,  H04J13/16 ,  H04J2013/0037 ,  H04L1/0001 ,  H04L1/004 ,  H04L1/0042 ,  H04L1/0047 ,  H04L1/0054 ,  H04L1/0059 ,  H04L5/1446 ,  H04L25/0212 ,  H04L27/206 ,  H04L27/2332 ,  H04L2027/003 ,  H04L2027/0053 ,  H04N1/00912 ,  H04N1/3333 ,  H04N2201/3335 ,  H04W52/04 ,  H04W52/08 ,  H04W52/143 ,  H04W52/146 ,  H04W52/24 ,  H04W52/241 ,  H04W52/245 ,  H04W52/247 ,  H04W52/26 ,  H04W52/262 ,  H04W52/322 ,  H04W52/325 ,  H04W52/343 ,  H04W52/346 ,  H04W52/36 ,  H04W52/367 ,  H04W52/44 ,  H04W52/50 ,  H04W52/52 ,  H04W52/54 ,  H04W52/60 ,  Y02D10/14

Abstract: An improvement for a method and system for tracking a spreading code, used in a code division multiple access (CDMA) system. An input signal has spread-spectrum modulation. The spreading code embedded in the spread-spectrum modulation has a plurality of chips. The input signal is sampled, and half-chip offset samples are formed from the sampled input signal. An even set of the half-chip offset samples are grouped into an early set of samples, and an odd set of the half-chip offset samples are grouped into a late set of samples. Each early set of samples is multiplied by spreading codes c(n+1), c(n+2), . . . , c(n+L), to generate a first plurality of products. L is approximately equal to the number of chips of delay between the earliest and latest multipath signals. A first plurality of sums and magnitudes are computed from the first plurality of products. The first plurality of magnitudes are multiplied by a first plurality of weights, to generate a first plurality of weighted-signal values. The first plurality of weighted-signal values are summed to generate an early signal-energy value. Each late set of samples is multiplied by spreading codes c(n−1), c(n−2), . . . , c(n−L), to generate a second plurality of products. A second plurality of sums and magnitudes are computed from the second plurality of products. The second plurality of magnitudes are multiplied by a second plurality of weights, to generated a second plurality of weighted-signal values. The second plurality of weighted-signal values are summed to generate a late signal-energy value. A difference is calculated between the early signal-energy value and the late signal-energy value, thereby producing an error signal.

Abstract translation: 用于跟踪在码分多址（CDMA）系统中使用的扩展码的方法和系统的改进。 输入信号具有扩频调制。 嵌入在扩频调制中的扩展码具有多个码片。 对输入信号进行采样，并从采样输入信号形成半码片偏移采样。 半组合偏移样本的偶数组被分组为早期采样集合，并且半组合偏移样本的奇数组被分组为后期样本集合。 每个早期的样本集合乘以扩展码c（n + 1），c（n + 2）。 。 。 ，c（n + L），以产生第一多个产品。 L近似等于最早和最新的多径信号之间的延迟码片数。 从第一多个产品中计算出第一多个和值和量值。 第一多个量值乘以第一多个权重，以产生第一多个加权信号值。 将第一组多个加权信号值相加以产生早期信号能量值。 每个后期的样本集合乘以扩展码c（n-1），c（n-2）。 。 。 ，c（n-L），以产生第二多个产品。 从第二多个产品中计算第二个数量和的数量。 第二多个量值乘以第二多个权重，以产生第二多个加权信号值。 将第二多个加权信号值相加以产生后期信号能量值。 在早期的信号能量值和后期的信号能量值之间计算出差异，从而产生误差信号。

公开(公告)号：US06701431B2

公开(公告)日：2004-03-02

申请号：US09772582

申请日：2001-01-29

Applicant: Ravi Subramanian ,  Christopher Woodthorpe

Inventor： Ravi Subramanian ,  Christopher Woodthorpe

IPC: G06F9445

CPC classification number: H04B1/0003 ,  H04B1/707 ,  H04B2201/7071 ,  H04B2201/70711

Abstract: A method of generating a configuration for a configurable spread spectrum communication device is disclosed herein. The method, implemented on a computing device having a processor and a computer readable memory, starts with a first step of receiving an input identifying a desired function, and a desired operation within the desired function, to be implemented by a configurable communication device. In a subsequent step, a signal flow path for the desired operation is generated by the computing device. Next, the desired operation is mapped onto a computing element within the configurable communication device; the computing element having localized control and being function-specific. The aforementioned steps are repeated to satisfy multiple operations required to enable the desired function. Next, a configurable interconnect of the configurable electronic device is configured to enable the mapping operation and signal flow path across a computing element for each of the multiple operations which together enable the desired function.

Abstract translation: 本文公开了一种生成可配置扩频通信设备的配置的方法。 在具有处理器和计算机可读存储器的计算设备上实现的方法开始于接收标识期望功能的输入以及期望功能内的期望操作的第一步骤，以由可配置通信设备来实现。 在随后的步骤中，用于期望操作的信号流路径由计算设备产生。 接下来，将期望的操作映射到可配置通信设备内的计算元件上; 该计算元件具有局部控制并且是功能特定的。 重复上述步骤以满足实现期望功能所需的多个操作。 接下来，可配置电子设备的可配置互连被配置为使得能够跨越计算元件的映射操作和信号流路径用于多个操作中的每一个，这些操作共同实现期望的功能。

公开(公告)号：US20040032839A1

公开(公告)日：2004-02-19

申请号：US10411739

申请日：2003-04-11

Applicant: InterDigital Technology Corporation

Inventor： John David Kaewell JR. ,  Timothy Berghuis ,  Jan Meyer ,  Peter Bohnhoff ,  Alexander Reznik ,  Edward L. Hepler ,  Michael Koch ,  William C. Hackett ,  David S. Bass ,  Steven Ferrante

IPC: H04B007/216

CPC classification number: H04B1/7093 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/709 ,  H04B1/7113 ,  H04B1/7117 ,  H04B1/712 ,  H04B7/0491 ,  H04B2201/7071 ,  H04B2201/70711

Abstract: A Node-B/base station has an access burst detector. The access burst detector comprises at least one antenna for receiving signals from users and a pool of reconfigurable correlators. Each correlator correlates an inputted access burst code at an inputted code phase with an inputted antenna output. An antenna controller selectively couples any output of the at least one antenna to an input of any of the correlators. A code controller provides to an input of each correlator an access burst code. The code controller controls the inputted code phase of each controller. A sorter/post processor sorts output energy levels of the correlators.

Abstract translation: 节点B /基站具有接入脉冲串检测器。 接入脉冲串检测器包括用于从用户接收信号的至少一个天线和可重构相关器的池。 每个相关器将输入的码相位中输入的接入突发码与输入的天线输出相关。 天线控制器选择性地将至少一个天线的任何输出耦合到任何相关器的输入。 代码控制器向每个相关器的输入提供访问突发代码。 代码控制器控制每个控制器的输入代码阶段。 分拣机/后处理器对相关器的输出能量进行排序。

公开(公告)号：US06683905B1

公开(公告)日：2004-01-27

申请号：US09550566

申请日：2000-04-17

Applicant: Eric J. King ,  Michael R. Kay

Inventor： Eric J. King ,  Michael R. Kay

IPC: H03K900

CPC classification number: H04B1/406 ,  H04B2201/7071

Abstract: A common dual-mode physical layer architecture for a communications receiver is capable of receiving either frequency hopping spread spectrum signals or direct sequence spread spectrum signals. A delta-sigma modulator is configured as an oversampling A/D converter with predetermined quantization noise shaping characteristics. The respective spread spectrum signal is processed by the delta-sigma modulator and then filtered via a decimation filter such as a (sin(x))/x filter to generate a quadrature signal having sufficient resolution to meet industry standards.

Abstract translation: 用于通信接收机的常见的双模式物理层架构能够接收跳频扩频信号或直接序列扩频信号。 Δ-Σ调制器被配置为具有预定的量化噪声整形特性的过采样A / D转换器。 相应的扩频信号由delta-sigma调制器处理，然后通过诸如（sin（x））/ x滤波器的抽取滤波器进行滤波，以产生具有足够分辨率以满足行业标准的正交信号。