公开(公告)号：AU6887891A

公开(公告)日：1991-06-13

申请号：AU6887891

申请日：1990-11-07

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

IPC: H04B7/08 ,  H04L1/06

Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

公开(公告)号：GR3026368T3

公开(公告)日：1998-06-30

申请号：GR980400553

申请日：1998-03-13

Applicant: MOTOROLA INC

Inventor： SMITH JOHN M ,  SCHULER JOSEPH J

IPC: H01Q3/24 ,  H04W88/08 ,  H04Q7/36

Abstract: An antenna switching system for handling high traffic sectors in a cellular radiotelephone system. The system switches the cell's base station transmitters (210) to sectors that have more mobile traffic than they can handle. The additional transmitters (210) increase the number of frequencies in the overloaded sector, thereby allowing a greater amount of mobile traffic to use the cell.

公开(公告)号：PL167072B1

公开(公告)日：1995-07-31

申请号：PL28773990

申请日：1990-11-13

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

IPC: H04B7/08 ,  H04L1/06

Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

公开(公告)号：CA1322033C

公开(公告)日：1993-09-07

申请号：CA616439

申请日：1992-07-15

Applicant: MOTOROLA INC

Inventor： JENSEN OLE H ,  LITTLE RICHARD I ,  SCHULER JOSEPH J

IPC: H03G3/20

Abstract: Power Amplifier for a Radio Frequency Signal A power amplifier is provided for amplifying a radio frequency signal such as in a burst modulation manner for use in GSM cellular radio The amplifier has means, such as a ROM (16), for producing a predetermined sequence of values in response to a control pulse. Means (21) are provided for converting each value into a power control signal, and control means (9) are provided for controlling the amplifier output power in accordance with said power control signal. In this manner, the power/time characteristic can be made to take the form of a raised cosine. The invention also provides power selection means for selecting a nominal output level from a plurality of discrete levels and for selecting power sub-levels offset from said selected level. An indication is recorded as to which sub-level best represents the nominal power level.

公开(公告)号：CA1317648C

公开(公告)日：1993-05-11

申请号：CA613572

申请日：1989-09-27

Applicant: MOTOROLA INC

Inventor： JENSEN OLE H ,  LITTLE RICHARD I ,  SCHULER JOSEPH J

IPC: H03G3/20 ,  H04B7/005 ,  H04J3/12 ,  H03F3/19 ,  H03F3/20

Abstract: Power Amplifier for a Radio Frequency Signal A power amplifier is provided for amplifying, a radio frequency signal such as in a burst modulation manner for use in GSM cellular radio The amplifier has means, such as a ROM (16), for producing a predetermined sequence of values in response to a control pulse. Means (21) are provided for converting each value into a power control signal, and control means (9) are provided for controlling the amplifier output power in accordance with said power control signal. In this manner, the power/time characteristic can be made to take the form of a raised cosine. The invention also provides power selection means for selecting a nominal output level from a plurality of discrete levels and for selecting power sub-levels offset from said selected level. An indication is recorded as to which sub-level best represents the nominal power level.

公开(公告)号：MX9102720A

公开(公告)日：1992-06-01

申请号：MX9102720

申请日：1991-12-19

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD P ,  KOTZIN MICHAEL D ,  SCHULER JOSEPH J

IPC: H04B7/005 ,  H04B1/10 ,  H04L25/02 ,  H04L25/03 ,  H04L25/30 ,  H04L27/01 ,  H04L27/38 ,  H04H3/00

Abstract: An equalization system for equalizing a corrupted signal is disclosed. The equalization system includes a complex matched filter (400) and a maximum likelihood sequence estimator (MLSE) (405) for removing the effects of phase shift, amplitude variations, intersymbol interference, etc. resulting from multi-pathing and noise contributed by the receiver front end. The system estimates a correlation signal C(t) (505) and synchronizes C(t) 505 to maximize its energy as seen on the taps of the complex matched filter (400). Taps having amplitude coefficients below a predetermined threshold are set to zero to produce a modified CIR estimate. The modified CIR estimate which has had the effects of noise virtually eliminated, is then used to construct the complex matched filter (400) and is also used as input to the MLSE (405) to produce a better equalized data signal.

公开(公告)号：PL287739A1

公开(公告)日：1991-07-29

申请号：PL28773990

申请日：1990-11-13

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

IPC: H04B7/08 ,  H04L1/06 ,  H04B1/10 ,  H04L1/02

Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

公开(公告)号：CA2065739A1

公开(公告)日：1991-05-14

申请号：CA2065739

申请日：1990-11-07

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD P ,  ATKINSON FREDERICK G ,  RABE DUANE C ,  SCHULER JOSEPH J ,  WERRONEN ALTON P

IPC: H04B7/08 ,  H04L1/06

Abstract: A method and apparatus for diversity reception in a communication system is provided. A dual branch receiver (100, 101) is provided with a stored replica of expected reference information (104) so that correlation with received time-dispersed signals produces an estimate of the transmission channel's impulse response as seen by each branch (100, 101), and determines, among other things, phase error between the branch local oscillators (208, 209) and the time-dispersed signals. Matched filters (214, 215) are constructed which then coherently align the time-dispersed signals from each branch (100, 101) with that branch's local oscillator (208, 209) which constitutes a part of the signal equalization. A diversity processor (105) performs bit by bit selection on the re-aligned signals, maximal ratio combining of the re-aligned signals, or equal gain combining of the re-aligned signals, followed by a sequence estimation which uses similarly selected or combined channel distortion compensation parameters to complete the equalization process on the new signal.

公开(公告)号：WO2008082748A2

公开(公告)日：2008-07-10

申请号：PCT/US2007082153

申请日：2007-10-22

Applicant: MOTOROLA INC ,  CHIN KE-KANG ,  SCHULER JOSEPH J ,  SWENSON R SCOTT

Inventor： CHIN KE-KANG ,  SCHULER JOSEPH J ,  SWENSON R SCOTT

IPC: H03H7/40

CPC classification number: H04L25/03 ,  H04L25/02

Abstract: A wireless communication system (100), method, and base station (112) are provided for optimizing performance of a base station receiver (120). The method includes selecting an interpolation matrix (216) specially tailored for particular channel characteristics from a pre-defined set of interpolation matrices (218), using the selected interpolation matrix in a channel estimation, and applying the derived channel estimates for the data subcarriers to an equalizer (118) as a set of weights. The interpolation matrix (216) is selected by using the matrix corresponding to a received channel profile information, or by monitoring a performance metric (212) while using each interpolation matrix of a pre-defined set of matrices in the channel estimation and applying the derived channel estimates for the data subcarriers as a set of weights to the receiver equalizer (118) and selecting the matrix resulting in best performance.

Abstract translation: 提供了用于优化基站接收机（120）的性能的无线通信系统（100），方法和基站（112）。 该方法包括使用信道估计中的所选择的内插矩阵，从预先定义的一组内插矩阵（218）中选择专门针对特定信道特性定制的内插矩阵（216），并将导出的数据子载波的信道估计应用于 均衡器（118）作为一组权重。 通过使用对应于所接收的信道轮廓信息的矩阵或通过在使用信道估计中的预定义的矩阵集合的每个内插矩阵的同时监视性能度量（212）来选择内插矩阵（216） 将数据副载波的信道估计作为到接收器均衡器（118）的一组权重并选择导致最佳性能的矩阵。

公开(公告)号：WO2007106652A2

公开(公告)日：2007-09-20

申请号：PCT/US2007062588

申请日：2007-02-22

Applicant: MOTOROLA INC ,  HILL THOMAS C ,  ANDERSON JEFF S ,  CLASSON BRIAN K ,  KOTZIN MICHAEL D ,  MUTHUSWAMY SIVAKUMAR ,  SCHULER JOSEPH J

Inventor： HILL THOMAS C ,  ANDERSON JEFF S ,  CLASSON BRIAN K ,  KOTZIN MICHAEL D ,  MUTHUSWAMY SIVAKUMAR ,  SCHULER JOSEPH J

IPC: H04W28/04 ,  H04W76/02 ,  H04W92/12

CPC classification number: H04W92/12 ,  H04B7/0408 ,  H04W76/02

Abstract: A communication system (100) and a method (500) of communicating backhaul data. The communication system can include a controller (160, 225). The controller can dynamically select from a plurality of backhaul sites (120, 125) at least a first backhaul site to establish a backhaul communication link with an access point (115). The controller also can generate a control signal that indicates to the access point to beam steer a backhaul signal to the first backhaul site. The access point can include a phased array (215) that dynamically beam steers the backhaul signal in azimuth and elevation.

Abstract translation: 通信系统（100）和传送回程数据的方法（500）。 通信系统可以包括控制器（160,225）。 所述控制器可以从多个回程站点（120,125）动态地选择至少第一回程站点，以建立与接入点（115）的回程通信链路。 控制器还可以产生一个控制信号，该控制信号向接入点指示向第一个回程站点引导回程信号。 接入点可以包括相位阵列（215），其动态地将方向和高度的回程信号转向。