公开(公告)号：US06788668B1

公开(公告)日：2004-09-07

申请号：US09515222

申请日：2000-02-29

Applicant: Yogendra Champaklal Shah ,  Reza Aghazadeh-Alavi ,  Karim Nassiri Toussi ,  Sharad D. Sambhwani

Inventor： Yogendra Champaklal Shah ,  Reza Aghazadeh-Alavi ,  Karim Nassiri Toussi ,  Sharad D. Sambhwani

IPC: H04B7216

CPC classification number: H04W52/029 ,  H04B2201/70709 ,  H04J13/0025 ,  H04J13/10 ,  Y02D70/00

Abstract: In one embodiment, the present invention is a method for conserving power supplied to a linear feedback shift register (LFSR) long code (LC) generator, the method including steps of operating the LC generator during pre-assigned time slots; shutting off the LC generator during standby periods between the pre-assigned time slots; and priming starting states of the LC generator for synchronization with pre-assigned time slots following a standby period. This embodiment of the present invention enables power to be removed from the LFSR LC generator as well as the LFSR clock. Because the accuracy of the LFSR clock is usually derived from a system master transistor-controlled crystal oscillator (TCXO), and because the LFSR clock operates at a relatively high rate, the TCXO can also be powered down to conserve power. A low frequency, low power clock source can then be used instead of the higher powered clock source and TCXO to maintain operation of the mobile during the mobile sleep state.

Abstract translation: 在一个实施例中，本发明是一种用于节省提供给线性反馈移位寄存器（LFSR）长码（LC）发生器的功率的方法，该方法包括在预分配时隙期间操作LC发生器的步骤; 在预分配的时隙之间的待机期间关闭LC发生器; 以及启动LC发生器的启动状态，以在等待时间段之后与预分配的时隙同步。 本发明的该实施例使得能够从LFSR LC发生器以及LFSR时钟中去除功率。 由于LFSR时钟的精度通常来自系统主晶体管控制晶体振荡器（TCXO），并且由于LFSR时钟以较高的速率工作，因此TCXO也可以掉电以节省功耗。 然后可以使用低频，低功率时钟源而不是较高功率的时钟源和TCXO，以在移动睡眠状态期间保持移动设备的操作。

公开(公告)号：US20040097204A1

公开(公告)日：2004-05-20

申请号：US10712693

申请日：2003-11-13

Inventor： Peter Jung ,  Jorg Plechinger ,  Michael Schneider ,  Tideya Kella ,  Thomas Ruprich

IPC: H04B001/00 ,  H03D001/00 ,  H04L027/06

CPC classification number: H04B1/712 ,  H04B1/7117 ,  H04B2201/70709

Abstract: In a method for multi-subscriber detection using a RAKE receiver structure, one or more RAKE fingers is or are deactivated in order to reduce the power consumption of the RAKE receiver structure during operation. This makes it possible to considerably reduce the signal processing complexity for equalization, since only those energy-relevant areas of the channel impulse response which are required to ensure a required quality of service (QoS) are included in the JD algorithm.

Abstract translation: 在使用RAKE接收机结构的多用户检测的方法中，为了在操作期间降低RAKE接收机结构的功耗，一个或多个RAKE指状态被去激活或被去激活。 这使得可以显着地降低用于均衡的信号处理复杂度，因为只有那些在确保所需的服务质量（QoS）所需的信道脉冲响应的那些能量相关区域被包括在JD算法中。

公开(公告)号：US06724738B1

公开(公告)日：2004-04-20

申请号：US09648963

申请日：2000-08-25

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

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

IPC: H04B7216

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。 使用非实时时钟对样本进行相关，以使信号处理与芯片速率分离。 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：US06636557B2

公开(公告)日：2003-10-21

申请号：US09947344

申请日：2001-09-07

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

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

IPC: H04B169

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 defects a synchronization phase from high-order small bits of the N bits and outputs synchronozation 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成N位的数字信号的A / D转换器，以及从N位的高阶小位缺陷同步相位的搜索器，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：US20030086381A1

公开(公告)日：2003-05-08

申请号：US10273478

申请日：2002-10-18

Inventor： Stephen E. Terry ,  Robert A. DiFazio

IPC: G08C017/00 ,  H04J003/00

CPC classification number: H04B7/2618 ,  H04B7/2643 ,  H04B2201/70709 ,  H04J13/00 ,  H04W52/0216 ,  Y02D70/25 ,  Y02D70/449

Abstract: A system and method that achieve power savings by turning off all or some of the baseband processing for codes and timeslots that have not been transmitted due to full DTX. When full DTX is detected by reception of a Special Burst (SB), the receiver is turned off for all timeslots and frames for the duration of the Special Burst Scheduling Period (SBSP). The transmitter schedules transmissions following any idle period to start on the boundary of the SBSP. The receiver determines the SBSP and if the transmitter initiates transmissions according to SBSP by reception of several initial full DTX cycles.

Abstract translation: 通过关闭由于完整的DTX而未被发送的代码和时隙的全部或部分基带处理来实现功率节省的系统和方法。 当通过接收到特殊突发（SB）检测到完整的DTX时，在特殊突发调度周期（SBSP）的持续时间内，接收机关闭所有时隙和帧。 发射机在任何空闲时段之后调度传输，以在SBSP的边界开始。 接收机确定SBSP，并且发射机通过接收几个初始的完整DTX周期，根据SBSP发起发射。

公开(公告)号：US20020110099A1

公开(公告)日：2002-08-15

申请号：US10090498

申请日：2002-03-04

Applicant: InterDigital Technology Corporation

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

IPC: 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 method of using a user equipment (UE) in a wireless time division duplex communication system. The system uses code division multiple access and communicates using communication bursts. Each communication burst has a unique channelization code and a midamble code which is uniquely related to the channelization code, each such midamble code being uniquely related to one or more channelization code. The UE receives communication bursts and detects each midamble code in a received communication burst. The UE determines the channelization codes related to each detected midamble based on a mapping of midamble codes to related channelization codes. The UE detects channelization codes in the received communication burst from among the determined channelization codes. The UE recovers data from the received communication burst based on in part the detected channelization codes. Where all midamble codes are uniquely related to one channelization code, the UE recovers data from the received communication burst based on in part the determined channelization codes without the additional channelization code detection step.

Abstract translation: 一种在无线时分双工通信系统中使用用户设备（UE）的方法。 该系统使用码分多址，并使用通信脉冲进行通信。 每个通信突发具有唯一的信道化码和与信道化码唯一相关的中间码，每个这样的中间码与唯一的一个或多个信道化码有关。 UE接收通信突发并检测接收到的通信突发中的每个中间码。 UE根据中间码编码与相关信道化码的映射，确定与每个检测到的中间码相关的信道化码。 UE从确定的信道化码中检测接收到的通信突发中的信道化码。 基于部分检测到的信道化码，UE从接收到的通信脉冲串中恢复数据。 在所有中间码编码与一个信道化码唯一相关的情况下，UE部分地基于所确定的信道化码，而不用附加的信道化码检测步骤，从接收到的通信脉冲串中恢复数据。

公开(公告)号：US20020097698A1

公开(公告)日：2002-07-25

申请号：US10090372

申请日：2002-03-04

Applicant: InterDigital Technology Corporation

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 user equipment (UE) for a wireless time division duplex communication system which uses code division multiple access. The system communicates using communication bursts, each communication burst having a unique channelization code and a midamble code which is uniquely related to the channelization code. Each such midamble code being uniquely related to one or more channelization code. The UE has an antenna for receiving communication bursts and a midamble detector which detects each midamble code in a received communication burst. A logic block determines the channelization codes related to each detected midamble based on a mapping of midamble codes to related channelization codes. A channelization code detector detects channelization codes in the received communication burst from among channelization codes determined by said logic block. A multiuser detection device recovers data from the received communication burst based on in part the channelization codes detected by said channelization code detector. Where all midamble codes are uniquely related to one channelization code, the multiuser detection device recovers data from the received communication burst based on in part the determined channelization codes without the need for the channelization code detector.

Abstract translation: 一种用于无线时分双工通信系统的用户设备（UE），其使用码分多址。 该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与信道化码唯一相关的中间码。 每个这样的中间码代码与一个或多个信道化代码唯一相关。 UE具有用于接收通信突发的天线和在接收的通信突发中检测每个中间码的中置码检测器。 逻辑块基于中间码编码与相关信道化码的映射来确定与每个检测到的中间码相关的信道化码。 信道化码检测器从由所述逻辑块确定的信道化码中检测接收到的通信脉冲串中的信道化码。 多用户检测装置部分地基于由所述信道化码检测器检测到的信道化码，从接收的通信脉冲串中恢复数据。 在所有中间码编码与一个信道化码唯一相关的情况下，多用户检测装置部分地基于所确定的信道化码而不需要信道化码检测器从接收到的通信脉冲串中恢复数据。

公开(公告)号：US20020051484A1

公开(公告)日：2002-05-02

申请号：US09947344

申请日：2001-09-07

Applicant: KOKUSAI ELECTRIC CO. LTD

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

IPC: H04K001/00

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

Abstract: There is disclosed a despreading circuit which can reduce a circuit scale and power consumption. In the despreading circuit of the present invention, A/D converter converts a CDMA modulated analog signal to a digital signal of N bits, a searcher 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, and the sliding correlator despreads the N bit digital signal outputted by the A/D converter and transmits the resulting correlation output as a demodulated signal to the outside.

Abstract translation: 公开了可以减小电路规模和功耗的解扩电路。 在本发明的解扩电路中，A / D转换器将CDMA调制的模拟信号转换成N位的数字信号，搜索器从N位的高阶小位检测同步相位，并将同步相位信息输出到 控制电路根据相位信息，向滑动相关器发送允许去扩频的信号，并且滑动相关器对由A / D转换器输出的N位数字信号进行解扩，并将得到的相关输出作为 解调信号到外部。

公开(公告)号：US6151353A

公开(公告)日：2000-11-21

申请号：US883160

申请日：1997-06-26

Applicant: Daniel David Harrison ,  Jerome Johnson Tiemann

Inventor： Daniel David Harrison ,  Jerome Johnson Tiemann

IPC: G01S1/00 ,  G01S5/00 ,  G01S5/14 ,  G01S19/25 ,  G06F17/15 ,  H04B1/16 ,  H04B1/707 ,  H04B1/708 ,  H04B1/7107 ,  H04L27/30 ,  G01S1/44 ,  G01S3/52 ,  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 ,  H04W52/0283

Abstract: A direct sequence spread spectrum receiver samples an incoming signal and stores the sample in memory. Prior to sampling and storage, the incoming signal is translated to an IF signal. Also prior to storage, the IF signal is corrected for a frequency offset signal. The frequency offset may be caused by many sources, Doppler shift or local oscillator error, for example. Once the signal is corrected for the frequency offset, the signal sample is stored in memory. The signal sample is read from memory as necessary to process the signal. 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样本存储在存储器中。 在采样和存储之前，输入信号被转换为IF信号。 同样在存储之前，针对频率偏移信号校正IF信号。 频率偏移可能由许多来源引起，例如多普勒频移或本地振荡器误差。 一旦对频率偏移校正了信号，信号样本将被存储在存储器中。 根据需要从存储器读取信号采样以处理信号。 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。

公开(公告)号：US6028887A

公开(公告)日：2000-02-22

申请号：US883419

申请日：1997-06-26

Applicant: Daniel David Harrison ,  Jerome Johnson Tiemann

Inventor： Daniel David Harrison ,  Jerome Johnson Tiemann

IPC: G01S1/00 ,  G01S5/00 ,  G01S19/34 ,  G06F17/15 ,  H04B1/16 ,  H04B1/707 ,  H04B1/708 ,  H04B1/7107 ,  H04B15/00 ,  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 stores the sample in memory. Power is then inhibited to the tuner of the receiver to minimize power consumption. The signal sample may be read from memory when necessary to process the signal without further signal acquisition. Power to other receiver sections may be selectively controlled to minimize power consumption. Such a receiver is useful in global positioning satellite (GPS) signal processing where the receiver has a limited power supply.

Abstract translation: 直接序列扩频接收机对输入信号进行采样并将样本存储在存储器中。 然后，功率被禁止接收机的调谐器以最小化功耗。 当需要处理信号而无需进一步的信号采集时，可以从存储器读取信号样本。 可以选择性地控制对其他接收机部分的功率以最小化功率消耗。 这种接收机在接收机具有有限电源的全球定位卫星（GPS）信号处理中是有用的。