公开(公告)号：WO1994029985A1

公开(公告)日：1994-12-22

申请号：PCT/US1994006358

申请日：1994-06-03

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LEE, Edward, K., B. ,  CADD, Jimmy ,  FULGHUM, Tracy, L. ,  BABAYI, Robert, S.

IPC: H04L09/00

CPC classification number: H04L7/04 ,  H04B1/7097 ,  H04J13/00 ,  H04L7/041 ,  H04L7/046

Abstract: In a CDMA communication system (100) capable of communicating between a receiver (20) and a transmitter (10) direct sequence spread spectrum communication signals (30), a system and method for synchronizing receiver bit timing and transmitter timing. Transmitter (10) transmits a training bit sequence (31) followed by a transmitter bit timing sequence (33). The receiver (20) adaptively determines a representation of a despreading chip sequence using a tapped delay line equalizer (400). Receiver bit timing offset is determined based on the representation of the despreading chip sequence and the transmitter bit timing sequence (33).

Abstract translation: 在能够在接收机（20）和发射机（10）之间进行通信的直接序列扩频通信信号（30）的CDMA通信系统（100）中，用于同步接收机比特定时和发射机定时的系统和方法。 发送器（10）发送训练比特序列（31），接着是发送器比特定时序列（33）。 接收器（20）使用抽头延迟线均衡器（400）自适应地确定解扩展码片序列的表示。 基于去扩展码片序列和发射机比特定时序列的表示来确定接收机比特定时偏移（33）。

公开(公告)号：WO1994021064A1

公开(公告)日：1994-09-15

申请号：PCT/US1994001628

申请日：1994-02-17

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  FULGHUM, Tracy, L. ,  LEE, Edward, K., B. ,  CADD, Jimmy, W.

IPC: H04K01/00

CPC classification number: H04J13/16

Abstract: A code division multiple access (CDMA) communication system (10) for reuse of available spreading codes includes a first communication device (100) and a second communication device (106). The first and second communication devices (100, 106) are capable of identifying spreading codes and operating frequencies that are optimum for their respective radios. The identity of the optimum spreading code and the frequency of the optimum frequency is communicated from one communication device (100) to another (106), hence allowing the two devices to communicate with each other using their respective optimum codes and frequencies. These codes and frequencies may be periodically updated to provide reusability of codes. By dynamically updating codes and frequencies without the use of a central station, the efficiency and reusability of codes in the CDMA system (10) is significantly enhanced.

Abstract translation: 用于重用可用扩展码的码分多址（CDMA）通信系统（10）包括第一通信设备（100）和第二通信设备（106）。 第一和第二通信设备（100,106）能够识别对于它们各自的无线电是最佳的扩展码和工作频率。 最佳扩展码的标识和最佳频率的频率从一个通信设备（100）传送到另一个（106），从而允许两个设备使用它们各自的最佳代码和频率彼此通信。 可以周期性地更新这些代码和频率以提供代码的可重用性。 通过在不使用中心站的情况下动态地更新代码和频率，CDMA系统（10）中的代码的效率和可重用性显着增强。

公开(公告)号：EP0721713A1

公开(公告)日：1996-07-17

申请号：EP95912066.0

申请日：1994-09-26

Applicant: MOTOROLA, INC.

Inventor： LEE, Edward, K., B.

IPC: H04B1 ,  H04L25

CPC classification number: H04B1/7097 ,  H04L25/03038

Abstract: In an adaptive CDMA receiver (20), a Direct Sequence Spread Spectrum (DS-SS) received signal and a reference signal are equalized by minimizing the error between them. The received signal includes a desired DS-SS communication signal comprising binary bits coded with spreading chip sequences. The received signal is sampled at a chip rate to produce sampled received signals which are correlated with each other. The received samples are partially de-correlated by employing an orthogonal transformation algorithm to provide de-correlated subspace elements and correlated subspace elements. The adaptive equalization process is based on de-correlated and correlated subspace elements. Tap coefficients of a despreading equalizer (400) are updated for the de-correlated and correlated elements individually and collectively, respectively. This selective updating of tap coefficients provides for fast convergence and minimum error.

公开(公告)号：EP0701753B1

公开(公告)日：2001-09-26

申请号：EP94921246.8

申请日：1994-06-03

Applicant: MOTOROLA, INC.

Inventor： LEE, Edward, K., B. ,  CADD, Jimmy ,  FULGHUM, Tracy, L. ,  BABAYI, Robert, S.

IPC: H04L9/00 ,  H04L27/30 ,  H04B1/66

CPC classification number: H04L7/04 ,  H04B1/7097 ,  H04J13/00 ,  H04L7/041 ,  H04L7/046

公开(公告)号：WO1996007234A1

公开(公告)日：1996-03-07

申请号：PCT/US1995010565

申请日：1995-08-18

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LEE, Edward, K., B. ,  HECK, Joseph, P.

IPC: H03C05/00

CPC classification number: H03K9/06 ,  H03D3/007 ,  H04L27/2332

Abstract: A communication device (100) includes first (104) and second (108) mixers for producing first in-phase and quadrature phase component, respectively. Additional zero-crossing points are efficiently generated by adding and subtracting the in-phase and quadrature components in a summer (116) and a subtractor (118), respectively. The additional zero-crossing points are generated by the formation of second in-phase and quadrature components. A zero-crossing detector (128) is used for detecting zero crossings using the first and second in-phase components and the first and second quadrature phase components.

Abstract translation: 通信设备（100）包括分别用于产生第一同相和正交相分量的第一（104）和第二（108）混频器。 通过在加法器（116）和减法器（118）中相加和减去同相和正交分量来分别有效地产生附加的过零点。 通过形成第二同相和正交分量来产生额外的过零点。 过零检测器（128）用于使用第一和第二同相分量以及第一和第二正交相位分量来检测过零点。

公开(公告)号：WO1995009493A1

公开(公告)日：1995-04-06

申请号：PCT/US1994010828

申请日：1994-09-26

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LEE, Edward, K., B.

IPC: H04J13/00

CPC classification number: H04B1/7097 ,  H04L25/03038

Abstract: In an adaptive CDMA receiver (20), a Direct Sequence Spread Spectrum (DS-SS) received signal and a reference signal are equalized by minimizing the error between them. The received signal includes a desired DS-SS communication signal comprising binary bits coded with spreading chip sequences. The received signal is sampled at a chip rate to produce sampled received signals which are correlated with each other. The received samples are partially de-correlated by employing an orthogonal transformation algorithm to provide de-correlated subspace elements and correlated subspace elements. The adaptive equalization process is based on de-correlated and correlated subspace elements. Tap coefficients of a despreading equalizer (400) are updated for the de-correlated and correlated elements individually and collectively, respectively. This selective updating of tap coefficients provides for fast convergence and minimum error.

Abstract translation: 在自适应CDMA接收机（20）中，直接序列扩频（DS-SS）接收信号和参考信号通过最小化它们之间的误差而被均衡。 所接收的信号包括期望的DS-SS通信信号，包括用扩展码片序列编码的二进制位。 接收的信号以码片速率被采样以产生彼此相关的采样的接收信号。 通过使用正交变换算法来提供解相关的子空间元素和相关的子空间元素，所接收的样本被部分去相关。 自适应均衡过程基于去相关和相关的子空间元素。 解扩均衡器（400）的抽头系数分别针对逐个和集体的去相关和相关元素进行更新。 抽头系数的这种选择性更新提供快速收敛和最小误差。

公开(公告)号：WO1996005679A1

公开(公告)日：1996-02-22

申请号：PCT/US1995010334

申请日：1995-08-14

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LEE, Edward, K., B.

IPC: H04L27/14

CPC classification number: H04L27/1563

Abstract: A communication device (100) includes mixers (104 and 108) which mix a local oscillator (112, 106) with a received signal to produce in-phase (i) and quadrature (q) components. The direction of the phase of the signal is detected as it crosses the i and q axes. The direction of the phase rotation is kept track of by a bi-directional counter (123) in order to demodulate multi-level digital signals. A positive rotation increments the bi-directional counter (123). Conversely, a negative direction decrements the counter (123). The final count of the counter (123) is used by a decision device (124) to establish the content of the received information signal.

Abstract translation: 通信设备（100）包括将本地振荡器（112,106）与接收信号混合以产生同相（i）和正交（q）分量的混频器（104和108）。 当信号的相位与i轴和q轴交叉时，检测相位的方向。 通过双向计数器（123）跟踪相位旋转的方向，以解调多电平数字信号。 正旋转增加双向计数器（123）。 相反，负方向使计数器（123）递减。 由判定装置（124）使用计数器（123）的最终计数来建立所接收的信息信号的内容。

公开(公告)号：WO1996005652A1

公开(公告)日：1996-02-22

申请号：PCT/US1995010369

申请日：1995-08-14

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LEE, Edward, K., B.

IPC: H03D03/00

CPC classification number: H04L27/2332 ,  H03D3/007 ,  H03D7/165 ,  H03D2200/0064

Abstract: A communication device (100) includes mixers (104 and 108) which mix a local oscillator (112, 106) with a received signal to produce in-phase (i) and quadrature (q) components. The direction of the phase of the signal is detected at the i and q zero crossings. Next, the speed with which the phase rotation angle travels from one zero crossing to another is monitored via a controller (126). The controller (126) manipulates the speed and the direction of the phase rotation angle in order to establish the contents of the received information signal.

Abstract translation: 通信设备（100）包括将本地振荡器（112,106）与接收信号混合以产生同相（i）和正交（q）分量的混频器（104和108）。 在i和q过零点处检测信号的相位方向。 接下来，经由控制器（126）监视相位旋转角度从一个零交叉行进到另一个过零点的速度。 为了建立所接收的信息信号的内容，控制器（126）操纵相位旋转角度的速度和方向。

公开(公告)号：WO1995004413A1

公开(公告)日：1995-02-09

申请号：PCT/US1994008172

申请日：1994-07-20

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  LEE, Edward, K., B.

IPC: H04K01/00

CPC classification number: H04B1/7097 ,  H04L7/0062

Abstract: In an adaptive CDMA receiver (20), a DS-SS received signal and a reference signal are equalized by minimizing the error between them. The received signal includes a desired DS-SS communication signal comprising binary bits coded with spreading chip sequences. The received signal is sampled at a chip rate to produce sampled received signals which are correlated with each other. The received samples are de-correlated by employing an orthogonal transformation algorithm to provide de-correlated elements corresponding to the received samples. The equalization process is accelerated by minimizing the error based on the de-correlated elements.

Abstract translation: 在自适应CDMA接收机（20）中，DS-SS接收信号和参考信号通过最小化它们之间的误差而相等。 所接收的信号包括期望的DS-SS通信信号，包括用扩展码片序列编码的二进制位。 接收的信号以码片速率被采样以产生彼此相关的采样的接收信号。 通过采用正交变换算法来对接收到的样本进行去相关，以提供与接收样本相对应的去相关元素。 通过基于去相关元素最小化误差来加速均衡过程。

公开(公告)号：EP0712553B1

公开(公告)日：2002-12-11

申请号：EP94924477.6

申请日：1994-07-20

Applicant: MOTOROLA, INC.

Inventor： LEE, Edward, K., B.

IPC: H04K1/00 ,  H04B1/707

CPC classification number: H04B1/7097 ,  H04L7/0062