公开(公告)号：US06839567B2

公开(公告)日：2005-01-04

申请号：US10400343

申请日：2003-03-26

Applicant: Fatih M. Ozluturk ,  Gary R. Lomp

Inventor： Fatih M. Ozluturk ,  Gary R. Lomp

IPC: H04B1/707 ,  H04B1/7075 ,  H04B1/7077 ,  H04B1/708 ,  H04B7/005 ,  H04B7/216 ,  H04B7/26 ,  H04W52/36 ,  H04W52/50 ,  H04W52/60 ,  H04B7/00

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 base station for controlling transmission power during the establishment of a communication channel utilizes the reception of a short code 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 access code. The ramp-up starts from a power level that is lower than the required power level for detection by the base station. The power of the short code is quickly increased until the signal is detected by the base station. Once the base station detects the short code, it transmits an indication that the short code has been detected.

公开(公告)号：US20040247020A1

公开(公告)日：2004-12-09

申请号：US10482599

申请日：2003-12-23

Inventor： Diane G. Mills ,  Michael J. Kotrilk ,  Kari M. Karwedsky

IPC: H04B001/707

CPC classification number: H04B1/7107 ,  H04B1/692 ,  H04B1/7103 ,  H04B1/71075 ,  H04B2201/70702 ,  H04J11/0023 ,  H04L5/026 ,  H04L25/03159 ,  H04L27/2601 ,  H04L2025/03414

Abstract: Interference cancellation techniques for use in a wireless multicarrier communications system where signals from multiple wireless networks might be present and interfering with the detection and demodulation processes are disclosed. Interference cancellation is applied to the interfering network before removing same-system interference. By removing the contribution of all interfering systems' from a receiver's aggregate signal, the receiver is capable of detection and demodulation. Performance can be further improved by including an additional level of interference cancellation within the system of interest to separate the individual user of interest.

Abstract translation: 公开了一种用于在来自多个无线网络的信号可能存在​​并且干扰检测和解调过程的无线多载波通信系统中的干扰消除技术。 在去除同一系统干扰之前，干扰消除被应用于干扰网络。 通过从接收机的聚合信号中消除所有干扰系统的贡献，接收机能够进行检测和解调。 通过在感兴趣的系统内包括额外的干扰消除水平来分离感兴趣的个体用户，可以进一步改善性能。

公开(公告)号：US06829485B2

公开(公告)日：2004-12-07

申请号：US09955521

申请日：2001-09-12

Applicant: Farrokh Abrishamkar ,  Mark Roh

Inventor： Farrokh Abrishamkar ,  Mark Roh

IPC: H04Q720

CPC classification number: H04W68/00 ,  H04B1/7075 ,  H04B1/7115 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04W52/028 ,  H04W68/025 ,  Y02D70/40

Abstract: A system determines if a primary paging channel should be received based on an examination of a quick paging channel. A first QPCH symbol is examined (102) and the normalized pilot energy is determined (104). If the normalized pilot energy is above a first threshold (106), the symbol is demodulated and the QPCH-symbol-to-pilot-energy ratio is determined (110) and compared against another threshold (112). If the normalized pilot energy is below the first threshold, the system proceeds to the second QPCH symbol immediately. Depending on the resulting values, a second QPCH signal is examined (108), the system sleeps (114), or the system decides (116) to process the primary paging channel directly (118). If the second signal is demodulated, and if its normalized pilot energy is high enough, it also is demodulated and the ratio of the sum-of-the-combined-QPCH-symbols to the sum-of-the-combined-pilot-energies is determined (122). If this ratio exceeds a threshold (124), the primary paging channel is processed (118); otherwise the system sleeps (114).

Abstract translation: 系统基于快速寻呼信道的检查来确定是否应该接收主寻呼信道。 检查第一QPCH符号（102）并且确定归一化导频能量（104）。 如果归一化的导频能量高于第一阈值（106），则对该符号进行解调并且确定QPCH符号到导频能量比（110）并与另一阈值（112）进行比较。 如果归一化的导频能量低于第一阈值，则系统立即进入第二QPCH符号。 根据得到的值，检查第二QPCH信号（108），系统休眠（114），或者系统决定（116）直接处理主寻呼信道（118）。 如果第二信号被解调，并且如果其归一化导频能量足够高，则其也被解调，并且组合QPCH符号之和与组合导频能量之和的比率 确定（122）。 如果该比率超过阈值（124），则处理主寻呼信道（118）; 否则系统睡眠（114）。

公开(公告)号：US06819927B1

公开(公告)日：2004-11-16

申请号：US09612372

申请日：2000-07-07

Applicant: Takaaki Sato

Inventor： Takaaki Sato

IPC: H04Q720

CPC classification number: H04W24/00 ,  H04B1/7075 ,  H04B2201/70702 ,  H04W36/18 ,  H04W52/0232 ,  H04W52/0245 ,  Y02D70/40

Abstract: A mobile station is provided for autonomously detect an abrupt change of a propagation environment of a radio wave signal from a base station for servicing a peripheral cell and immediately executing a peripheral cell search. In order to execute a received signal strength indication plural times within one period of the peripheral cell search, the mobile station operates to set a cell search execution period &Dgr;t1 to a timer of a peripheral cell search controller and a RSSI measuring execution period &Dgr;t2 to a timer. The RSSI measuring unit operates to measure the RSSI in the receiving band at each RSSI measuring execution period &Dgr;t2 and immediately execute the peripheral cell search when the peripheral cell search controller determines that the RSSI has greatly varied.

Abstract translation: 提供一种移动台，用于自主地检测来自用于维护外围小区的基站的无线电波信号的传播环境的突变，并且立即执行周边小区搜索。 为了在周边小区搜索的一个周期内多次执行接收信号强度指示，移动台操作以将小区搜索执行周期Deltat1设置为周边小区搜索控制器的定时器和RSSI测量执行周期Deltat2至 定时器 RSSI测量单元操作以在每个RSSI测量执行周期Deltat2处测量接收频带中的RSSI，并且当外围小区搜索控制器确定RSSI已经大大变化时立即执行外围小区搜索。

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：US20040208143A1

公开(公告)日：2004-10-21

申请号：US10811911

申请日：2004-03-30

Applicant: SONY ERICSSON MOBILE COMMUNICATIONS JAPAN, INC.

Inventor： Taku Nagase

IPC: H04Q007/00

CPC classification number: H04B1/7115 ,  H04B1/7117 ,  H04B2201/70702 ,  H04B2201/70707

Abstract: The invention aims to decrease a processing load and power consumption for a path searcher during a soft hand-over process and fast search for multipath signals. The invention is so configured that correlation integrators 18a through 18h are divided into a group to search a base station as hand-over origin for multipath signals and another group to search a base station as hand-over destination for multipath signals. This makes it possible to simultaneously search the base stations as hand-over origin and destination for multipath signals. Consequently, a single process can search the base stations as hand-over origin and destination for multipath signals. It is possible to decrease a processing load and power consumption for the path searcher during the soft hand-over process. In addition, multipath signals can be searched fast.

Abstract translation: 本发明旨在减少在软切换过程中的路径搜索器的处理负载和功耗，并快速搜索多径信号。 本发明被配置为使得相关积分器18a至18h被划分成一组，以搜索基站作为多径信号的切换来源，另一组搜索基站作为多路径信号的切换目的地。 这使得可以同时搜索基站作为多路径信号的切换起点和目的地。 因此，单个进程可以搜索基站作为多路径信号的切换源和目的地。 可以在软切换过程中降低路径搜索器的处理负荷和功耗。 此外，可以快速搜索多路径信号。

公开(公告)号：US20040203966A1

公开(公告)日：2004-10-14

申请号：US10397524

申请日：2003-03-27

Applicant: NEC CORPORATION

Inventor： Tsutomu Tsukagoshi

IPC: H04B015/00

CPC classification number: H04W72/005 ,  H04B1/7115 ,  H04B2201/70702 ,  H04L12/1845 ,  H04L12/185 ,  H04L12/189 ,  H04W4/06 ,  H04W4/08 ,  H04W52/40 ,  H04W76/40 ,  H04W88/02 ,  H04W88/08 ,  H04W88/184 ,  Y02D70/122 ,  Y02D70/40

Abstract: A multicast communication method in a CDMA mobile communication system which is capable of reducing a transmission power in a base station system, and is capable of performing an efficient multicast operation for a large number of mobile subscribers is provided. The starting of information distribution by a multicast operation and identification information indicating a content of the information thereof are notified through a broadcast channel to a mobile subscriber. Further, through the broadcast channel, information such as a spread code or the like to be used at this time, which is necessary for actual reception of communication data, is notified. Then, in the mobile subscriber, a surround environment of the mobile subscriber is checked to determine the possibility of simultaneous receiving from a plurality of other base station systems. If possible, similar notified information is also received from other base station systems. Thus, all kinds of information regarding the spread code or the like to be used for receiving distributed information are obtained.

Abstract translation: 提供了一种CDMA移动通信系统中的能够降低基站系统的发送功率并且能够对大量移动用户进行有效的多播操作的多播通信方法。 通过多播操作的信息分发的开始和指示其信息的内容的标识信息通过广播信道被通知给移动用户。 此外，通过广播信道，通知实际接收通信数据所需的此时要使用的扩频码等信息。 然后，在移动用户中，检查移动用户的环绕环境，以确定从多个其他基站系统同时接收的可能性。 如果可能，也从其他基站系统接收类似的通知信息。 因此，获得关于用于接收分发信息的扩展码等的各种信息。

公开(公告)号：US20040165566A1

公开(公告)日：2004-08-26

申请号：US10762519

申请日：2004-01-23

Inventor： Dong-Hoon Lee ,  Sung-Jae Kim ,  Dong-Ryeol Ryu

IPC: H04B007/216

CPC classification number: H04B1/7083 ,  H04B1/709 ,  H04B2201/70702

Abstract: An integrated cell searcher of a dual mode modem, which supports different communication modes, is provided.

Abstract translation: 提供了支持不同通信模式的双模式调制解调器的集成小区搜索器。

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：US20040116122A1

公开(公告)日：2004-06-17

申请号：US10666374

申请日：2003-09-18

Applicant: InterDigital Technology Corporation

Inventor： Eldad Zeira ,  Ariela Zeira

IPC: H04Q007/20

CPC classification number: H04L1/0001 ,  H04B1/71075 ,  H04B7/022 ,  H04B2201/70701 ,  H04B2201/70702

Abstract: At least one desired communication signal is received by a receiver. The at least one desired communication signal is transmitted in a wireless format of a cell. A plurality of communication signals are received. Communication signals are selected from the plurality. The selected communication signals include each desired communication signal and at least one communication signal originating from another cell. A channel estimate is produced for each selected communication signal. Data is jointly detected for the selected communication signals.

Abstract translation: 至少一个期望的通信信号被接收机接收。 以小区的无线格式发送所述至少一个期望的通信信号。 接收多个通信信号。 从多个选择通信信号。 所选择的通信信号包括每个期望的通信信号和源自另一小区的至少一个通信信号。 为每个所选择的通信信号产生信道估计。 对所选择的通信信号共同检测数据。