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公开(公告)号：FR2696602A1
公开(公告)日：1994-04-08
申请号：FR9311649
申请日：1993-09-30
Applicant: MOTOROLA INC
Inventor： BORTH DAVID E , HAUG JOHN R , RASKY PHILLIP D
Abstract: The signalling channel is divided into two blocks of line separated by N/2 line blocks in the N line blocks multiplexed in the TDMA frame. The first block contains synchronisation information and the second block contains information on the jump sequence. Access is just gained on one carrier, among a number, to which the signalling channel and many voice channels are jumped. When the signalling frequency is changed, synchronisation is obtained and information on the jump sequence is obtained. The signalling channel has sub-channels for signal broadcast, synchronisation, personal calling, short messages, acceptance of access and broadcast data. USE/ADVANTAGE - Mobile assisted hand-over in cellular communications. Communication quality maintained at cell boundary, simpler configuration. Possible lower cost version for slower operation.
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公开(公告)号：SE9303204L
公开(公告)日：1994-04-03
申请号：SE9303204
申请日：1993-10-01
Applicant: MOTOROLA INC
Inventor： BORTH DAVID E , HAUG JOHN R , RASKY PHILLIP D
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公开(公告)号：CA2009468C
公开(公告)日：1994-02-01
申请号：CA2009468
申请日：1990-02-07
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 , H04B1/16
Abstract: FREQUENCY CONTROL APPARATUS AND METNOD FOR A DIGITAL RADIO RECEIVER of the Invention A frequency control apparatus and method is disclosed in which a frequency offset between a received signal and the local oscillator (115) of a digital receiver is corrected in substantially one step.
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公开(公告)号：CA1324833C
公开(公告)日：1993-11-30
申请号：CA526482
申请日：1986-12-30
Applicant: MOTOROLA INC
Inventor： BORTH DAVID E , GERSON IRA A , VILMUR RICHARD J , LINDSLEY BRETT L
Abstract: A channel bank speech synthesizer for reconstructing speech from externally-generated acoustic feature inforamtion without using externally-generated voicing or pitch information is disclosed. An N-channel pitch-excited channel bank synthesizer (340) is provided having a first low-frequency group of channel gain values (1 to M) and a second high-frequency group of channel gain values (M+1 to N). The first group control a first group of amplitude modualtors (950) excited by a periodic pitch pulse source (920), and the second group controls amplitude modulators excited by a noise source (930). Both groups of modulated excitation signals are applied to the bandpass filters (960) to reconstruct the speech channels, and then combined at the summation network (970) to form a reconstructed synthesized speech signal. Additionally, the pitch pulse source (920) varies the pitch pulse period such that the pitch pulse rate decreases over the length of the word.
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公开(公告)号：ITRM930419D0
公开(公告)日：1993-06-25
申请号：ITRM930419
申请日：1993-06-25
Applicant: MOTOROLA INC
Inventor： BORTH DAVID E , RASKY PHILLIP D
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.
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Patent Agency Ranking
公开(公告)号：DK110491D0
公开(公告)日：1991-06-11
申请号：DK110491
申请日：1991-06-11
Applicant: MOTOROLA INC
Inventor： BORTH DAVID E , KEPLER JAMES FRANK M
Abstract: There is provided a method of and apparatus for Automatice Frequency Control (AFC) of pure sine waves (PSW). It is characterized by discriminating to detect frequency differences between a received pure sine wave and a reference frequency (20), integrating (30) the frequency differences to average the differences, and adjusting (40) the reference frequency (80) to eliminate the frequency difference. It is further characterized by digitizing, in quadrature, the received pure sine wave (70), mixing (50) the received pure sine wave with a complex sinusoid to translate the pure sine wave to baseband, quadrature filtering (60) the mixed sine wave, cross-product discrimination (20) to detect frequency differences between a received pure sine wave and a reference frequency, integration (30) the frequency differences to average the differences, selectively (100/110) calculating the mean/variance (90) between the pure sine wave and the reference frequency, and adjusting (40) the reference frequency of a Voltage Controlled Oscillator 80 to eliminate the frequency difference.
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公开(公告)号：FI905571A0
公开(公告)日：1990-11-09
申请号：FI905571
申请日：1990-11-09
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 , H03L
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.
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公开(公告)号：SE516074C2
公开(公告)日：2001-11-12
申请号：SE9303204
申请日：1993-10-01
Applicant: MOTOROLA INC
Inventor： BORTH DAVID E , HAUG JOHN R , RASKY PHILLIP D
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公开(公告)号：GB2311702B
公开(公告)日：2000-07-26
申请号：GB9705960
申请日：1997-03-21
Applicant: MOTOROLA INC
Inventor： LING FUYUN , BORTH DAVID E , FRANK COLIN D , RASKY PHILLIP D , KEPLER JAMES F
Abstract: A receiver circuit (400, 500) receives a spread spectrum communication signal, such as a DS-CDMA signal, including a pilot channel and including a power control designator. The signal is despread and decoded. The pilot symbols on the pilot channel are provided to a channel estimator (408) for estimating the channel phase and channel gain of the communication channel. This estimate is provided to a demodulator (422) for demodulating the traffic channel symbols. The pilot symbols are provided to another channel estimator (410) for estimating channel phase and channel gain for the power control designator. This estimate is provided to a demodulator (424) for demodulating the power control designator. The traffic channel symbols are delayed a predetermined time in a delay element (420) before demodulating. The power control designator is delayed a short time or not at all in a short delay element (418) before demodulation.
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公开(公告)号：DK0389974T3
公开(公告)日：1997-12-29
申请号：DK90105506
申请日：1990-03-23
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 , H03L7/093 , H04B7/212
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.
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