公开(公告)号：IE62289B1

公开(公告)日：1995-01-25

申请号：IE87190

申请日：1990-03-12

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  KEPLER JAMES F

IPC: H04L27/38 ,  H03J7/02 ,  H03L20060101 ,  H03L7/00 ,  H03L7/087 ,  H04B7/26 ,  H04L27/00 ,  H04L27/227

Abstract: A frequency control apparatus for a burst-mode radio communications system (TDMA) employing a frequency correction signal transmitted as a burst to enable correction of frequency differences between the frequency of the radio carrier of a subsequent communication burst and the frequency of reception by a radio receiver, the frequency control apparatus including a variable frequency oscillator (115), for receiving a frequency correction signal burst and a digital signal processor (111) for processing a communication burst having a frequency difference between said variable frequency oscillator and the radio carrier frequency of said communication burst and for generating a singular control signal value and for applying said singular control signal value to said variable frequency oscillator (115), via an A/D converter, to correct said frequency difference.

公开(公告)号：FI940883A0

公开(公告)日：1994-02-25

申请号：FI940883

申请日：1994-02-25

Applicant: MOTOROLA INC

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

IPC: H04B7/26 ,  H04W88/10 ,  H04L

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：FI940883A

公开(公告)日：1994-02-25

申请号：FI940883

申请日：1994-02-25

Applicant: MOTOROLA INC

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

IPC: H04B7/26 ,  H04W88/10 ,  H04L

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：GB2266036A

公开(公告)日：1993-10-13

申请号：GB9310894

申请日：1992-08-14

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  MUELLER BRUCE D ,  BAUM KEVIN L

IPC: H04L25/08 ,  H03H15/00 ,  H03H17/00 ,  H03H21/00 ,  H03M13/23 ,  H04B3/04 ,  H04L25/03 ,  H04L27/22 ,  H04B15/00 ,  G06F11/10 ,  H03M13/12 ,  H04L7/00

Abstract: A Viterbi equalizer (366) for decoding a pi /4 DQPSK modulated signal. Because symbol values of adjacent symbols of a pi /4 DQPSK signal are offset in phase relative to one another, allowable values of succeeding states of a pi /4 DQPSK signal are four in number. The signal paths of the Viterbi equalizer are thereby limited in number to four allowable next- states (600) and the Viterbi equalizer (366) is operative to select certain ones of the paths connecting the states at the adjacent time intervals as survivor paths to form maximum likelihood paths thereby.

公开(公告)号：CA1321425C

公开(公告)日：1993-08-17

申请号：CA526266

申请日：1986-12-24

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  GERSON IRA A ,  LINDSLEY BRETT L

IPC: G10L13/00 ,  G10L13/04 ,  G10L15/22 ,  H04M1/27 ,  H04M1/60 ,  G10L5/00

Abstract: CM00282G A user-interactive control system for an electronic device is disclosed which synthesizes speech from speech recogniton templates to generate voice reply feedback to the user indicative of which template word was recognized. The acoustic features of the user-spoken speech are extracted by the acoustic processor (110) and applied to the training processor (170) to generate word recogniton templates stored in the template memory (160). Recognition processor (120) compares the user-spoken features to the recognition templates to provide voice command data for the device controller (130) which controls the operating parameters of the electronic device (150). The device controller also produces device status data for the synthesis processor (140) which synthesizes a speech reply signal from the word recognition templates. In the preferred embodiment, a hands-free user-interactive control system for a mobile radiotelephone is provided utilizing speech synthesis from speech recognition templates.

公开(公告)号：GB2262416A

公开(公告)日：1993-06-16

申请号：GB9217377

申请日：1992-08-14

Applicant: MOTOROLA INC

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

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

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：CA2097059A1

公开(公告)日：1993-03-31

申请号：CA2097059

申请日：1992-08-14

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  MUELLER BRUCE D ,  BAUM KEVIN L

IPC: H04L25/08 ,  H03H15/00 ,  H03H17/00 ,  H03H21/00 ,  H03M13/23 ,  H04B3/04 ,  H04L25/03 ,  H04L27/22

公开(公告)号：MX9205519A

公开(公告)日：1993-03-01

申请号：MX9205519

申请日：1992-09-28

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  MUELLER BRUCE D ,  BAUM KEVIN L

IPC: H04L25/08 ,  H03H15/00 ,  H03H17/00 ,  H03H21/00 ,  H03M13/23 ,  H04B3/04 ,  H04L25/03 ,  H04L27/22 ,  H04B1/00

公开(公告)号：MX9203905A

公开(公告)日：1993-01-01

申请号：MX9203905

申请日：1992-07-02

Applicant: MOTOROLA INC

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

IPC: H04B3/04 ,  H04B7/00 ,  H04B7/005 ,  H04B7/08 ,  H04L1/02 ,  H04L25/06 ,  H04L27/01 ,  H04L27/22 ,  H04L5/00

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：FR2673781A1

公开(公告)日：1992-09-11

申请号：FR9202413

申请日：1992-02-28

Applicant: MOTOROLA INC

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

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

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.