公开(公告)号：US20030043766A1

公开(公告)日：2003-03-06

申请号：US09883740

申请日：2001-06-18

Inventor： John G. McDonough ,  Juncheng C. Liu ,  Yan Hui ,  Chunhao Chen

IPC: G08C017/00 ,  H04B007/216

CPC classification number: H04B1/70756 ,  H04B2201/70709

Abstract: A sleep control system and method are provided that permit a reference clock and the direct sequence spread spectrum (DSSS) modem in a mobile station receiver to be turned off and turned back on at arbitrary points in time while still maintaining accurate base station system time. Accurate timing is made possible through a number of techniques including precise initial calibration using a rising edge/falling edge averaging system, determining the sleep clock and reference clock frequencies, and the determination of the frequency drift of the sleep clock that occurred during the previous sleep interval.

Abstract translation: 提供一种睡眠控制系统和方法，其允许移动台接收机中的参考时钟和直接序列扩频（DSSS）调制解调器在任意时间点被关闭并重新接通，同时仍保持精确的基站系统时间。 通过包括使用上升沿/下降沿平均系统的精确初始校准，确定睡眠时钟和参考时钟频率以及确定在先前睡眠期间发生的睡眠时钟的频率漂移的许多技术，可以实现准确的定时 间隔。

公开(公告)号：US20020061052A1

公开(公告)日：2002-05-23

申请号：US09966753

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.

Abstract translation: 在具有至少两个手指的接收器中，手指跟踪多径信道的至少一个路径，方法包括以下步骤：形成两个手指中的至少两个手指的手指块并联合跟踪所述手指块的手指。 联合跟踪的步骤包括以下步骤：产生手指块的手指的联合移动的一组可能方向中的每一个的方向度量，根据预定标准选择方向度量之一，以及移动手指的手指 按所选方向度量标示的方向阻塞。

公开(公告)号：US06393010B1

公开(公告)日：2002-05-21

申请号：US09136699

申请日：1998-08-19

Applicant: Stein A. Lunby ,  Edward G. Tiedemann, Jr. ,  Jack M. Holtzman ,  Daisuke Terasawa

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

IPC: H04B7216

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

Abstract: 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. The total transmit power signal can be determined and the time offset can be selected according to the total transmit power signal to minimize a peak level of the total transmit power signal. Determining the total transmit power signal for a plurality of differing time offsets and selecting one of the time offsets according to the total transmit power signal is also taught. A fixed time offset or a randomly selected offset between the communication signals can be provided.

Abstract translation: 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。 可以确定总发射功率信号，并且可以根据总发射功率信号选择时间偏移，以使总发射功率信号的峰值电平最小化。 还教导了确定多个不同时间偏移量的总发射功率信号，并根据总发射功率信号选择一个时间偏移量。 可以提供通信信号之间的固定时间偏移或随机选择的偏移。

公开(公告)号：US20020054581A1

公开(公告)日：2002-05-09

申请号：US09997621

申请日：2001-11-29

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 in an idle mode and also request additional channels. 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上电时，而不是当前主动发送或接收数据。 这些维护子信道允许基站和用户单元在空闲模式下保持同步和时间同步，并且还请求附加信道。 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：US06314130B1

公开(公告)日：2001-11-06

申请号：US09301116

申请日：1999-04-28

Applicant: Lev Smolyar ,  Danny Yellin ,  Doron Rainish

Inventor： Lev Smolyar ,  Danny Yellin ,  Doron Rainish

IPC: H04L2730

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.

Abstract translation: 在具有至少两个手指的接收器中，手指跟踪多径信道的至少一个路径，方法包括以下步骤：形成两个手指中的至少两个手指的手指块并联合跟踪所述手指块的手指。 联合跟踪的步骤包括以下步骤：产生手指块的手指的联合移动的一组可能方向中的每一个的方向度量，根据预定标准选择方向度量之一，以及移动手指的手指 按所选方向度量标示的方向阻塞。

公开(公告)号：US06301292B1

公开(公告)日：2001-10-09

申请号：US09290398

申请日：1999-04-13

Applicant: Ichiro Imaizumi ,  Tetsuhiko Miyatani ,  Shunji Abe ,  Kenzo Urabe ,  Hitoshi Kato

Inventor： Ichiro Imaizumi ,  Tetsuhiko Miyatani ,  Shunji Abe ,  Kenzo Urabe ,  Hitoshi Kato

IPC: H04L2730

CPC classification number: H04B1/70753 ,  H04B1/7095 ,  H04B2201/70709

Abstract: A despreading circuit which can reduce a circuit scale and power consumption is described. The circuit includes an A/D converter which converts a CDMA modulated analog signal to a digital signal of N bits, and a searcher which detects a synchronization phase from high-order small bits of the N bits and outputs synchronization phase information to a control circuit. The control circuit transmits a signal for allowing despreading to be performed to a sliding correlator based on the phase information. The sliding correlator despreads the N bit digital signal outputted by the A/D converter and outputs the resulting correlation output as a despreading signal.

Abstract translation: 描述了可以减小电路规模和功耗的解扩电路。 该电路包括将CDMA调制的模拟信号转换为N位的数字信号的A / D转换器，以及从N位的高阶小位检测同步相位的搜索器，并将同步相位信息输出到控制电路 。 控制电路根据相位信息，向滑动相关器发送允许解扩的信号。 滑动相关器对由A / D转换器输出的N位数字信号进行解扩，并输出所得的相关输出作为解扩信号。

公开(公告)号：US20010024426A1

公开(公告)日：2001-09-27

申请号：US09775969

申请日：2001-02-02

Inventor： Ariela Zeira ,  Eldad Zeira ,  Alexander Reznik ,  Stephen E. Terry

IPC: H04Q007/00 ,  H04B007/216

CPC classification number: H04B1/7103 ,  H04B1/707 ,  H04B1/70735 ,  H04B1/7105 ,  H04B2001/70935 ,  H04B2201/70701 ,  H04B2201/70709 ,  H04J13/00 ,  H04J13/16

Abstract: A wireless time division duplex communication system using code division multiple access has a base station and user equipments. The system communicates using communication bursts. Each communication burst has a unique channelization code and a midamble code. Each midamble code is mapped to a set of at least one channelization code. For each communication burst to be transmitted in a time slot from the base station, the midamble code mapped to that burst's channelization code is determined. Communication bursts are generated and transmitted in the time slot. Each burst has the determined midamble code for its channelization code. The user equipment receives the bursts and determines each received midamble code. The user equipment determines the channelization codes of the transmitted communication bursts based on in part a result of the determining of each received midamble code.

Abstract translation: 使用码分多址的无线时分双工通信系统具有基站和用户设备。 系统使用通信突发进行通信。 每个通信突发具有唯一的信道化码和中间码。 每个中间码代码被映射到一组至少一个信道化码。 对于要在基站的时隙中发送的每个通信突发，确定映射到该突发的信道化码的中间码。 在时隙中生成和发送通信突发。 每个突发具有确定的其信道化码的中间码码。 用户设备接收突发并确定每个接收到的中间码。 用户设备部分地基于确定每个接收到的中间码的结果来确定所发送的通信脉冲串的信道化码。

公开(公告)号：US20010002904A1

公开(公告)日：2001-06-07

申请号：US09730376

申请日：2000-12-05

Applicant: Tantivy Communications, Inc.

Inventor： James A. Proctor JR.

IPC: H04J003/16 ,  H04J003/22

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：US06175561B1

公开(公告)日：2001-01-16

申请号：US09368267

申请日：1999-08-03

Applicant: Brian D. Storm ,  Christopher P. La Rosa

Inventor： Brian D. Storm ,  Christopher P. La Rosa

IPC: H04J1300

CPC classification number: H04B1/70752 ,  H04B1/70756 ,  H04B1/7077 ,  H04B1/7117 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04B2201/70703 ,  H04B2201/70709

Abstract: A searcher receiver (114) includes a sample buffer (202) which stores signal samples loaded using a real time clock. A real time linear sequence generator (RT LSG) (206) stores an initial state and is clocked using the real time clock. The contents of the RT LSG are loaded into a non-real time linear sequence generator (NRT LSG) (208) when sample processing begins Samples are correlated using a non-real time clock to allow signal processing to be uncoupled from the chip rate. The analog front end (108) may be powered down or tuned to another frequency during non-real time processing.

Abstract translation: 搜索器接收器（114）包括采样缓冲器（202），其存储使用实时时钟加载的信号样本。 实时线性序列发生器（RT LSG）（206）存储初始状态，并使用实时时钟计时。 当样本处理开始时，RT LSG的内容被加载到非实时线性序列发生器（NRT LSG）（208）中。使用非实时时钟将样本相关，以使信号处理与码片速率脱离。 在非实时处理期间，模拟前端（108）可以掉电或调谐到另一频率。

公开(公告)号：US6118808A

公开(公告)日：2000-09-12

申请号：US883159

申请日：1997-06-26

Applicant: Jerome Johnson Tiemann ,  Daniel David Harrison

Inventor： Jerome Johnson Tiemann ,  Daniel David Harrison

IPC: G01S1/00 ,  G01S5/00 ,  G01S5/14 ,  G01S19/25 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S19/42 ,  G06F17/15 ,  H04B1/06 ,  H04B1/16 ,  H04B1/707 ,  H04B1/708 ,  H04B1/7107 ,  H04L7/04 ,  H04K1/00 ,  G01S5/02

CPC classification number: H04B1/708 ,  G01S19/29 ,  G01S19/30 ,  G01S19/34 ,  G01S19/37 ,  G01S5/0027 ,  G01S5/0036 ,  G06F17/15 ,  H04B1/707 ,  H04B1/71075 ,  G01S19/42 ,  G01S5/0054 ,  H04B2201/70709

Abstract: A direct sequence spread spectrum receiver samples an incoming signal and translates the signal to an IF signal. The IF signal is sampled and stored in memory. In one embodiment, the memory consists of two memory banks which alternately receive sample segments. During a write period to one of the memory banks, the other memory bank supplies its output to a processor. This continues in a ping-pong manner. In another embodiment, a single memory bank is filled and read as necessary, the receiver ignoring incoming signal until the processor has completed processing the sample available at the output of the memory. Such a receiver is useful in global positioning satellite (GPS) signal processing where the incoming signal contains several satellite transmissions encoded with CDMA encoding.

Abstract translation: 直接序列扩频接收机对输入信号进行采样，并将信号转换为IF信号。 IF信号被采样并存储在存储器中。 在一个实施例中，存储器由两个交替地接收采样段的存储器组成。 在对其中一个存储体的写入周期期间，另一个存储器组件将其输出提供给处理器。 这样一来乒乓的方式。 在另一个实施例中，根据需要填充和读取单个存储器组，接收器忽略输入信号，直到处理器已经完成处理在存储器的输出处可用的采样。 这样的接收机在全球定位卫星（GPS）信号处理中是有用的，其中输入信号包含用CDMA编码编码的几个卫星传输。