公开(公告)号：US20030142639A1

公开(公告)日：2003-07-31

申请号：US10061874

申请日：2002-01-31

Inventor： Joseph Cheung ,  Gregory B. Foerster ,  Inyup Kang ,  Tao Li ,  Bruce R. Meagher ,  Shimman Patel ,  Christopher Patrick ,  Pillappakkam B. Srinivas ,  Srinivas Varadarajan ,  Jian Wei

IPC: H04B007/212

CPC classification number: H04B1/707 ,  H04B1/7075 ,  H04B2201/70709

Abstract: A pilot searcher for CDMA and GPS signals. In one aspect, the searcher is operated in conjunction with a sample buffer in a nullreal-timenull or nulloff-linenull mode. The writing/reading of samples to/from the buffer may be performed in a TDM manner via a common port, and samples may be decimated and packed prior to storing in the buffer. In another aspect, the overall search for pilots is partitioned into a number of tasks, with each task corresponding to a search over a given sample segment and based on a particular set of parameter values. The tasks may be stored in a queue and performed one at a time based on their order in the queue. Prior to performing a new task, the parameter values for that task is downloaded to a set of configuration registers. The parameters may be ordered and linked such that only new values are downloaded.

Abstract translation: 用于CDMA和GPS信号的导频搜索器。 在一个方面，搜索器与“实时”或“离线”模式的采样缓冲器结合操作。 可以通过公共端口以TDM方式执行对/从缓冲器的读取/从缓冲器的读取/读取，并且可以在存储在缓冲器中之前对样本进行抽取和打包。 在另一方面，对导频的总体搜索被划分成多个任务，其中每个任务对应于在给定采样段上的搜索并且基于特定参数值集合。 任务可以存储在队列中，并根据队列中的顺序一次执行一次。 在执行新任务之前，将该任务的参数值下载到一组配置寄存器。 可以对参数进行排序和链接，以便仅下载新值。

公开(公告)号：US20030128744A1

公开(公告)日：2003-07-10

申请号：US10338714

申请日：2003-01-09

Inventor： Soo-Bok Yeo ,  Sang-Min Bae ,  Ji-Won Ha ,  Jong-Han Kim

IPC: H04K001/00

CPC classification number: H04L1/20 ,  H04B1/70755 ,  H04B2201/70709 ,  H04L1/201

Abstract: An apparatus for detecting a frame transmission period in a CDMA mobile communication system supporting a discontinuous transmission mode. A first frame detector performs primary frame detection by calculating a signal-to-interference ratio (SIR) using traffic symbol energy, pilot symbol energy and noise energy measured for a predetermined time period, and comparing the SIR with a predetermined frame detection threshold value. A decoder calculates a symbol error rate (SER) by decoding symbols received for the predetermined time period. A second frame detector selects an SER threshold value according to frame detection information from the first frame detector, and compares the selected SER threshold value with the SER to determine whether a frame has been transmitted.

Abstract translation: 一种在支持不连续传输模式的CDMA移动通信系统中检测帧传输周期的装置。 第一帧检测器通过使用在预定时间段内测量的业务符号能量，导频符号能量和噪声能量，并将SIR与预定帧检测阈值进行比较来计算信号干扰比（SIR）来执行主帧检测。 解码器通过解码在预定时间段内接收到的符号来计算符号错误率（SER）。 第二帧检测器根据来自第一帧检测器的帧检测信息选择SER阈值，并将所选择的SER阈值与SER进行比较，以确定帧是否已被发送。

公开(公告)号：US20030104849A1

公开(公告)日：2003-06-05

申请号：US10306492

申请日：2002-11-27

Inventor： Kazuhiro Arimitsu

IPC: H04Q007/20 ,  H04B007/00 ,  H04M001/00 ,  H04B001/38

CPC classification number: H04W52/029 ,  H04B2201/70709 ,  H04W52/0261 ,  Y02D70/1262 ,  Y02D70/144 ,  Y02D70/164 ,  Y02D70/24

Abstract: In a CDMA mobile terminal, the power supply voltage of the mobile terminal is compared with a first threshold voltage, and frequency monitor is performed at a normal rate if the power supply voltage is higher than the first threshold voltage, and frequency monitor is performed at 1/N of the normal rate if the power supply voltage is lower than the first threshold voltage, where N is equal to or greater than 2. Additionally, the power level of an RF signal received by the mobile terminal is compared with a first reference level, and frequency monitor is performed at the normal rate if the power level of the RF signal is lower than the first reference level, and frequency monitor is performed at 1/N of the normal rate if the power level of the RF signal is higher than the first reference level.

Abstract translation: 在CDMA移动终端中，将移动终端的电源电压与第一阈值电压进行比较，并且如果电源电压高于第一阈值电压，则以正常速率执行频率监视，并且在 如果电源电压低于第一阈值电压，其中N等于或大于2，则为正常速率的1 / N。此外，将移动终端接收的RF信号的功率电平与第一参考 如果RF信号的功率电平低于第一参考电平，则以正常速率执行电平和频率监视，并且如果RF信号的功率电平更高，则以正常速率的1 / N执行频率监视 比第一个参考水平。

公开(公告)号：US06539049B1

公开(公告)日：2003-03-25

申请号：US09322240

申请日：1999-05-28

Applicant: John G. McDonough ,  Tien Q. Nguyen ,  David (Daching) Chen

Inventor： John G. McDonough ,  Tien Q. Nguyen ,  David (Daching) Chen

IPC: H04B1707

CPC classification number: H04B1/707 ,  H04B2201/70709

Abstract: An integrated circuit device includes a clock generator having a primary input for coupling to a primary reference frequency source, a secondary input for coupling to a secondary reference frequency source, and an output that produces a primary digital transceiver clock signal having a frequency of chiprate (S)(n) in a primary mode, and a secondiary digital transceiver clock signal having a frequency of chiprate in a secondary power saving mode. A chiprate divider connected to the output of the clock generator produces a primary mode enable signal that has a frequency of chiprate when in a primary mode. A long PN generator and a short PN generator each have a clock input that is coupled to the output of the clock generator. A first multiplexer output produces the primary mode enable signal in a primary mode, and the secondary mode enable signal in a secondary mode. A clock calibrator measures the frequency difference between 1/(S)(n) times the frequency of the primary digital transceiver clock signal and the frequency of the secondary digital transceiver clock signal as a function of time. A secondary mode timer indicates the amount of time the secondary mode is in effect. A controller calculates the cumulative resluting frequency error, and produces a signal for advancing or retarding a master timer to reduce the frequency error between the long PN generator and the short PN generator on the one hand, and the CDMA network time on the other hand.

Abstract translation: 集成电路器件包括时钟发生器，该时钟发生器具有用于耦合到主参考频率源的主输入端，用于耦合到次参考频率源的辅助输入端和产生具有频率为chiprate的主数字收发器时钟信号的输出端 S）（n），以及具有次级功率节省模式下的码片频率的二次数字收发器时钟信号。 连接到时钟发生器的输出的芯片分频器分频器产生主模式使能信号，当初级模式时，该模式使能信号具有芯片速率的频率。 长PN发生器和短PN发生器各自具有耦合到时钟发生器的输出的时钟输入。 第一多路复用器输出在主模式中产生主模式使能信号，并且辅助模式使能辅助模式使能信号。 时钟校准器测量主数字收发器时钟信号的频率1 /（S）（n）与辅助数字收发器时钟信号的频率之间的频率差，作为时间的函数。 辅助模式定时器指示辅助模式有效的时间量。 一个控制器计算累积停止频率误差，并产生用于前进或延迟主定时器的信号，一方面减小长PN发生器与短PN发生器之间的频率误差，另一方面产生CDMA网络时间。

公开(公告)号：US20020163898A1

公开(公告)日：2002-11-07

申请号：US10179121

申请日：2002-06-24

Applicant: Tantivy Communications, Inc.

Inventor： James A. Proctor JR.

IPC: H04B007/216

CPC classification number: H04B7/2628 ,  H04B1/7075 ,  H04B1/70754 ,  H04B2001/70706 ,  H04B2201/70703 ,  H04B2201/70709 ,  H04B2201/70715 ,  H04J13/0022 ,  H04J13/004 ,  H04J13/16 ,  H04J13/18 ,  H04L1/0007 ,  H04L1/165 ,  H04L1/1809 ,  H04L7/06 ,  H04L25/14 ,  H04L27/2601 ,  H04Q11/0428 ,  H04Q2213/13098 ,  H04Q2213/13202 ,  H04Q2213/13204 ,  H04Q2213/13209 ,  H04Q2213/13216 ,  H04Q2213/1327 ,  H04Q2213/13298 ,  H04Q2213/13332 ,  H04Q2213/1336 ,  H04Q2213/13389 ,  H04W24/00 ,  H04W28/20 ,  H04W28/22 ,  H04W56/00 ,  H04W56/0045 ,  H04W56/0075 ,  H04W72/0413 ,  H04W72/044 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/0466 ,  H04W74/00 ,  H04W74/04 ,  H04W76/28 ,  H04W84/14

Abstract: A service option overlay for a CDMA wireless communication in which multiple allocatable subchannels are defined on a reverse link by assigning different code phases of a given long pseudonoise (PN) code to each subchannel. The instantaneous bandwidth needs of each on-line subscriber unit are then met by dynamically allocating none, one, or multiple subchannels on an as needed basis for each network layer connection. The system efficiently provides a relatively large number of virtual physical connections between the subscriber units and the base stations on the reverse link for extended idle periods such as when computers connected to the subscriber units are powered on, but not presently actively sending or receiving data. These maintenance subchannels permit the base station and the subscriber units to remain in phase and time synchronism. This in turn allows fast acquisition of additional subchannels as needed by allocating new code phase subchannels. Preferably, the code phases of the new channels are assigned according to a predetermined code phase relationship with respect to the code phase of the corresponding maintenance subchannel.

公开(公告)号：US06452913B1

公开(公告)日：2002-09-17

申请号：US09515487

申请日：2000-02-29

Applicant: James A. Proctor, Jr.

Inventor： James A. Proctor, Jr.

IPC: H04J316

CPC classification number: H04B7/2628 ,  H04B1/7075 ,  H04B1/70754 ,  H04B2001/70706 ,  H04B2201/70703 ,  H04B2201/70709 ,  H04B2201/70715 ,  H04J13/0022 ,  H04J13/004 ,  H04J13/16 ,  H04J13/18 ,  H04L1/0007 ,  H04L1/165 ,  H04L1/1809 ,  H04L7/06 ,  H04L25/14 ,  H04L27/2601 ,  H04Q11/0428 ,  H04Q2213/13098 ,  H04Q2213/13202 ,  H04Q2213/13204 ,  H04Q2213/13209 ,  H04Q2213/13216 ,  H04Q2213/1327 ,  H04Q2213/13298 ,  H04Q2213/13332 ,  H04Q2213/1336 ,  H04Q2213/13389 ,  H04W24/00 ,  H04W28/20 ,  H04W28/22 ,  H04W56/00 ,  H04W56/0045 ,  H04W56/0075 ,  H04W72/0413 ,  H04W72/044 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/0466 ,  H04W74/00 ,  H04W74/04 ,  H04W76/28 ,  H04W84/14

Abstract: A service option overlay for a CDMA wireless communication in which multiple allocatable subchannels are defined on a reverse link by assigning different code phases of a given long pseudonoise (PN) code to each subchannel. The instantaneous bandwidth needs of each on-line subscriber unit are then met by dynamically allocating none, one, or multiple subchannels on an as needed basis for each network layer connection. The system efficiently provides a relatively large number of virtual physical connections between the subscriber units and the base stations on the reverse link for extended idle periods such as when computers connected to the subscriber units are powered on, but not presently actively sending or receiving data. These maintenance subchannels permit the base station and the subscriber units to remain in phase and time synchronism. This in turn allows fast acquisition of additional subchannels as needed by allocating new code phase subchannels. Preferably, the code phases of the new channels are assigned according to a predetermined code phase relationship with respect to the code phase of the corresponding maintenance subchannel.

Abstract translation: 一种用于CDMA无线通信的服务选项覆盖，其中通过向每个子信道分配给定长伪噪声（PN）码的不同码相位，在反向链路上定义多个可分配子信道。 然后通过根据需要基于每个网络层连接动态分配一个，一个或多个子信道来满足每个在线订户单元的瞬时带宽需求。 系统有效地在用户单元和反向链路上的基站之间提供相对大量的虚拟物理连接，用于延长的空闲周期，例如当连接到订户单元的计算机被接通而不是当前主动发送或接收数据时。 这些维护子信道允许基站和用户单元保持同步和时间同步。 这又允许通过分配新的码相子信道来快速获取附加的子信道。 优选地，根据相应维护子信道的码相位的预定码相位关系来分配新信道的码相位。

公开(公告)号：US20020101833A1

公开(公告)日：2002-08-01

申请号：US10084021

申请日：2002-02-25

Inventor： Stein A. Lunby ,  Edward G. Tiedemann JR. ,  Jack M. Holtzman ,  Daisuke Terasawa

IPC: H04B007/185 ,  H04B007/212

CPC classification number: H04B1/707 ,  H04B1/7097 ,  H04B2201/70701 ,  H04B2201/70706 ,  H04B2201/70709 ,  H04W52/30

Abstract: The invention is a method for limiting the peak transmit power in a CDMA communication system including the steps transmitting a first communication signal having a first high transmit power region and transmitting a second communication signal having a second high transmit power region. One of the first and second communication signals is time offset to prevent the first and second high transmit power regions from occurring simultaneously. Time shifting only a portion of one of the first and second communications signals is also taught. The first and second communication signals can also include respective first and second low transmit power regions. The time offset can be selected to align one of the first and second high transmit power regions with one of the first and second low transmit power regions.

Abstract translation: 本发明是一种用于限制CDMA通信系统中的峰值发射功率的方法，包括发送具有第一高发射功率区域的第一通信信号和发射具有第二高发射功率区域的第二通信信号的步骤。 第一和第二通信信号之一是时间偏移，以防止第一和第二高发射功率区域同时发生。 还教导了仅移动第一和第二通信信号之一的一部分的时移。 第一和第二通信信号还可以包括相应的第一和第二低发射功率区域。 可以选择时间偏移以使第一和第二高发射功率区域中的一个与第一和第二低发射功率区域中的一个对准。

公开(公告)号：US20020093920A1

公开(公告)日：2002-07-18

申请号：US09954667

申请日：2001-09-14

Inventor： Arthur J. Neufeld ,  Ehren Van Meller ,  De-Gang Richard Yao

IPC: G08C017/00

CPC classification number: H04W52/0229 ,  H04B1/70756 ,  H04B2201/70709 ,  H04W68/025 ,  Y02D70/40

Abstract: Techniques to process data sporadically transmitted at designated times in a wireless communication system, such as paging indicator (PI) bits on the quick paging channel in cdma2000. These techniques support a sleep cycle that may start at virtually anytime and having a sleep duration selected based on a fine time increment. The increment is selected such that the finger processors and symbol combiner of a rake receiver may be easily moved to the proper positions upon waking up from a sleep. Techniques are also provided to align the symbol combiner timing to that of a particular multipath in the received signal, if necessary. With these techniques, a terminal may perform a sleep between a pair of assigned PI bits and may wake up and process a single PI bit.

Abstract translation: 在无线通信系统中在指定时间偶尔发送数据的技术，例如cdma2000中快速寻呼信道上的寻呼指示符（PI）位。 这些技术支持睡眠周期，其可以在几乎任何时间开始并具有基于精细时间增量选择的睡眠持续时间。 选择增量使得当从睡眠唤醒时，耙式接收器的手指处理器和符号组合器可以容易地移动到适当的位置。 如果需要，还提供技术以将符号组合器定时与接收信号中的特定多径的定时对准。 利用这些技术，终端可以在一对分配的PI比特之间执行休眠，并且可以唤醒并处理单个PI比特。

公开(公告)号：US20020061056A1

公开(公告)日：2002-05-23

申请号：US09966736

申请日：2001-10-01

Inventor： Lev Smolyar ,  Daniel Yellin ,  Doron Rainish

IPC: H04K001/00

CPC classification number: H04B1/7117 ,  H04B1/7085 ,  H04B2201/70709

Abstract: In a receiver having at least two fingers, the fingers tracking at least one path of a multipath channel, a method includes the steps of forming a finger block of at least two of the two fingers and jointly tracking the fingers of said finger block. The step of jointly tracking includes the steps of generating direction metrics of each of a set of possible directions of joint movement of the fingers of the finger block, selecting one of the direction metrics according to a predetermined criterion, and moving the fingers of the finger block in the directions indicated by the selected direction metric.

公开(公告)号：US06363101B1

公开(公告)日：2002-03-26

申请号：US09277164

申请日：1999-03-26

Applicant: Shigeyuki Sudo ,  Osamu Hasegawa ,  Toshiya Eguchi

Inventor： Shigeyuki Sudo ,  Osamu Hasegawa ,  Toshiya Eguchi

IPC: H04J1304

CPC classification number: H04B1/70756 ,  H04B1/707 ,  H04B1/7075 ,  H04B2201/70709 ,  H04W52/029 ,  Y02D70/26 ,  Y02D70/40

Abstract: A receiver for the CDMA system, in order to reduce a power consumption during a suspension period of intermittent receiving operation, monitors a suspension period t1 by means of a low-power timer 51 so that a VC-TCXO 1, a reference signal group generation unit 2 and a receiving unit 3 are turned off and a modem unit 4 is set to a sleep state. Upon resumption of receiving operation, a high-accuracy timer 44 is supplied with a start (d) to require counting of time t3 and a part of a received signal is stored. A PN code phase of stored data is calculated in a PN code phase calculator 46 during a period t3 to obtain an indication value i for a phase deviation. State vectors for short code and long code and further a reception time t4 are calculated on the basis of the indication value i to be set. When the high-accuracy timer 44 counts t3 and produces 0V(d), demodulation operation by a rake demodulation unit 40, a demultiplexing unit 41 and a descrambler unit 42 is started in accordance with the setting and is continued during the reception time t4.

Abstract translation: 用于CDMA系统的接收机为了在间歇接收操作的暂停时段期间降低功率消耗，通过低功率定时器51监视暂停时段t1，使得VC-TCXO 1，参考信号组生成 单元2和接收单元3被关闭，并且调制解调器单元4被设置为睡眠状态。 在恢复接收操作时，高精度定时器44被提供有开始（d），以需要时间t3的计数，并且存储接收信号的一部分。 在期间t3期间，在PN码相位计算器46中计算存储数据的PN码相位，以获得相位偏差的指示值i。 基于要设定的指示值i计算短代码和长码的状态向量以及进一步的接收时间t4。 当高精度定时器44计数t3并产生0V（d）时，根据该设置开始由前置解调单元40，解复用单元41和解扰单元42的解调操作，并在接收时间t4期间继续。