公开(公告)号：FR2693060B1

公开(公告)日：1995-05-19

申请号：FR9307969

申请日：1993-06-30

Applicant: MOTOROLA INC

Inventor： STERN MORTON ,  CSAPO JOHN S ,  BORTH DAVID E ,  LYNK JR CHARLES N ,  HAUG JOHN R ,  SCHORMAN ERIC R ,  WA RASKY PHILLIP D ROZANSKI JR

IPC: H04B7/26 ,  H04W88/10 ,  H04L5/00 ,  H04B7/204

Abstract: The dual mode communication network comprises a first communication system having a frame structure and a first traffic channel protocol and a second communication system having the frame structure and a second traffic channel protocol. In the network, only one of the first and second traffic channel protocols supports forward error correction coding.

公开(公告)号：CA2146864A1

公开(公告)日：1994-05-26

申请号：CA2146864

申请日：1993-10-07

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  HAUG JOHN R ,  RASKY PHILLIP D ,  CHIASSON GREGORY M

IPC: G06F11/10 ,  H03M13/23 ,  H03M13/27 ,  H04B7/26 ,  H04L1/00 ,  H04L1/02 ,  H04L1/06 ,  H04W88/06 ,  H04B7/00 ,  H04L1/20

Abstract: -A dual mode radio communication unit (102, 104) for a digital communication system is provided having an error controller including an error detection encoder (111) and a forward error correction encoder (112) which encode an input information signal into an error protected data bit stream. In addition, the communication unit includes a mode selector which enables either the error detection encoder or the forward error correction encoder used with a particular mode of operation of the communication unit. Further, a corresponding dual mode radio communication unit is provided having an error controller for generating estimated information signal samples according to a group of algorithms consisting of either an error detection algorithm (261) or an error correction algorithm (202). In addition, the corresponding communication unit includes a mode selector (141) for receiving a signal according to a particular one of the group of algorithms which is associated with a particular mode of operation of the corresponding communication unit.

公开(公告)号：CA2106692A1

公开(公告)日：1994-04-08

申请号：CA2106692

申请日：1993-09-22

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  HAUG JOHN R ,  RASKY PHILLIP D

IPC: H04W36/14 ,  H04W36/30 ,  H04W48/18 ,  H04W60/00 ,  H04W76/04 ,  H04W92/02 ,  H04B7/26

Abstract: METHOD OF REGISTERING/REASSIGNING A CALL IN A DUAL MODE COMMUNICATION NETWORK Registration operates by sensing (106) the availability of a first communication system. A quality factor of a channel of the system is measured (111). A channel of the first system is selected if the quality factor of the channel exceeds a threshold (113). If selected, the subscriber attempts to register the call (114). If the registration fails, the availability of a second communication system is sensed (107). A quality factor of a channel of the second system is measured (111) and selected (113), if the quality factor exceeds a threshold. The subscriber will then attempt to register (114) with the second system. Reassignment operates by determining if the first system has reached a capacity limit (126). If it has, it determines if a channel on the second system is available (128). If available, a transfer of the call from the first to the second system will be attempted (132).

公开(公告)号：ITRM930419A1

公开(公告)日：1994-01-01

申请号：ITRM930419

申请日：1993-06-25

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  CSAPO JOHN S ,  HAUG JOHN R ,  LYNK JR CHARLES N ,  RASKY PHILLIP D ,  ROZANSKI JR WALTER J ,  SCHORMAN ERIC R ,  STERN MORTON

IPC: H04B20060101 ,  H04B7/26 ,  H04W88/10

公开(公告)号：CA2003580C

公开(公告)日：1993-11-09

申请号：CA2003580

申请日：1989-11-22

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  KEPLER JAMES F M

IPC: H04L27/14 ,  H04L27/00 ,  H04L27/18 ,  H04L27/227 ,  H04B1/16

Abstract: There is provided a method of and apparatus for Automatic Frequency Control (AFC) in the presence of data. It comprises removing the effects of data modulated onto the carrier, detecting the frequency difference between the carrier frequency and the phase of the reference oscillator, and adjusting the frequency of the reference oscillator to eliminate the frequency difference. It is further characterized by digitizing the modulated carrier in quadrature, sampling the modulated carrier in quadrature at a multiple of the modulated bit rate, rotating phases toward arctangent (I/Q)=0 to remove the effects of quadrature data (I/Q) modulated onto the carrier, detecting the frequency difference between the carrier frequency and the frequency of a Voltage Controlled type of reference oscillator with a phase trajectory estimator, adjusting the frequency of the reference oscillator by the frequency difference, and establishing and generating the requisite correction voltage for a Voltage Controlled type of reference oscillator (VCO) with the phase trajectory estimator.

公开(公告)号：SE9303204D0

公开(公告)日：1993-10-01

申请号：SE9303204

申请日：1993-10-01

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  HAUG JOHN R ,  RASKY PHILLIP D

IPC: H04B7/26 ,  H04W74/04

公开(公告)号：ITRM920121A1

公开(公告)日：1993-08-24

申请号：ITRM920121

申请日：1992-02-24

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  EYUBOGLU M VEDAT ,  LING FUYUN ,  RASKY PHILLIP D

IPC: H03H17/00 ,  H03H15/00 ,  H03H21/00 ,  H03M13/00 ,  H03M13/23 ,  H04B1/10 ,  H04B1/12 ,  H04B3/14 ,  H04B7/005 ,  H04J20060101

公开(公告)号：BR9204765A

公开(公告)日：1993-07-06

申请号：BR9204765

申请日：1992-02-12

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  RASKY PHILIP D ,  LING FUYUN ,  EYUBOGLU M VEDAT

IPC: H03H15/00 ,  H03H17/00 ,  H03H21/00 ,  H03M13/00 ,  H03M13/23 ,  H04B1/10 ,  H04B1/12 ,  H04B3/14 ,  H04B7/005 ,  H03M13/12

Abstract: A signal weighting system for associating a confidence level with portions of a communication signal transmitted upon a multipath channel and received by a receiver. A signal received by the receiver is equalized by an equalizer circuit, such as a maximum likelihood sequence estimator, and the equalized signal generated thereby is supplied to an adaptive filter which is synthesizes portions of the multipath channel. The signal received by the receiver is altered responsive to values of a filtered, equalized signal generated by the adaptive filter.

公开(公告)号：ITRM920475D0

公开(公告)日：1992-06-22

申请号：ITRM920475

申请日：1992-06-22

Applicant: MOTOROLA INC

Inventor： RASKY PHILLIP D ,  MUELLER BRUCE D ,  BAUM KEVIN L ,  BORTH DAVID E ,  WINTER ERIC H

IPC: H04B3/04 ,  H04B7/00 ,  H04B7/005 ,  H04B7/08 ,  H04L1/02 ,  H04L25/06 ,  H04L27/01 ,  H04L27/22

Abstract: A system and method for correcting for Rayleigh interference of a signal transmitted upon a multi-path channel. The system adaptively calculates values of channel gain and noise variance of the channel upon which the signal is transmitted, and generates signals indicative of such calculations which are supplied to a decoder. The system may be utilized to form a portion of a coherent, or noncoherent receiver which receives encoded and differentially-encoded signals.

公开(公告)号：BR9105733A

公开(公告)日：1992-05-19

申请号：BR9105733

申请日：1991-04-09

Applicant: MOTOROLA INC

Inventor： ARENS JOHN W ,  BORTH DAVID E ,  KEPLER JAMES F

IPC: H04B1/16 ,  H03G3/20 ,  H04B1/30 ,  H04B7/005 ,  H04L27/14 ,  H04L27/22

Abstract: There is provided a mechanism for Automatic Gain Control in a receiver. It comprises: determining, within a certain dynamic range, the difference in power between the desired signal and a signal received, and providing open loop gain control for the signal in response to the differential so determined, scaled by the receiver's gain characteristics, such that the signal is positioned within dynamic range so as to reduce saturation and noise.