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公开(公告)号：DE68923881D1
公开(公告)日：1995-09-21
申请号：DE68923881
申请日：1989-05-22
Applicant: MOTOROLA INC
Inventor： LEITCH CLIFFORD , STEEL FRANCIS
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公开(公告)号：DE68923881T2
公开(公告)日：1996-04-11
申请号：DE68923881
申请日：1989-05-22
Applicant: MOTOROLA INC
Inventor： LEITCH CLIFFORD , STEEL FRANCIS
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公开(公告)号：DE3889106T2
公开(公告)日：1994-10-13
申请号：DE3889106
申请日：1988-01-11
Applicant: MOTOROLA INC
Inventor： STEEL FRANCIS , LEITCH CLIFFORD , SUAREZ JOSE
IPC: H04L23/02 , H04L25/03 , H04L27/20 , H04L27/34 , H04L27/36 , H04L27/38 , H04L25/49 , H04L5/12 , H04B1/02
Abstract: A method and apparatus are provided for generating a uniquely shaped prototype digital pulse which is transmitted with minimal frequency spectrum consumption and yet a relatively high bit rate. Such uniquely shaped digital pulse is stored in a memory included in a transmitter until transmission is desired, at which time a positive of the pulse is transmitted to correspond to a first logic level or the negative of the pulse is transmitted to correspond to a second logic level.
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公开(公告)号：DE69228773T2
公开(公告)日：1999-10-07
申请号：DE69228773
申请日：1992-06-29
Applicant: MOTOROLA INC
Inventor： SIWIAK KAZIMIERZ , LEITCH CLIFFORD , SCHWENDEMAN ROBERT
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公开(公告)号：DE69228773D1
公开(公告)日：1999-04-29
申请号：DE69228773
申请日：1992-06-29
Applicant: MOTOROLA INC
Inventor： SIWIAK KAZIMIERZ , LEITCH CLIFFORD , SCHWENDEMAN ROBERT
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Patent Agency Ranking
公开(公告)号：DE3853782T2
公开(公告)日：1995-11-23
申请号：DE3853782
申请日：1988-12-16
Applicant: MOTOROLA INC
Inventor： LEITCH CLIFFORD
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公开(公告)号：DE69030198T2
公开(公告)日：1997-10-02
申请号：DE69030198
申请日：1990-07-09
Applicant: MOTOROLA INC
Inventor： LEITCH CLIFFORD
Abstract: A method is described for transmitting digital data with minimum splatter and for recovering the same with a conventional frequency modulated (FM) receiver to obtain data having minimum intersymbol interference. The method utilizes an optimized prototype pulse which has been predistorted to match the inverse characteristics of the post detection low pass filter in a conventional FM receiver. When the optimized electric pulse is received and processed by the post detection low pass filter of the conventional FM receiver, a pulse shape exhibiting minimal intersymbol interference is produced.
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公开(公告)号：DE69030198D1
公开(公告)日：1997-04-17
申请号：DE69030198
申请日：1990-07-09
Applicant: MOTOROLA INC
Inventor： LEITCH CLIFFORD
Abstract: A method is described for transmitting digital data with minimum splatter and for recovering the same with a conventional frequency modulated (FM) receiver to obtain data having minimum intersymbol interference. The method utilizes an optimized prototype pulse which has been predistorted to match the inverse characteristics of the post detection low pass filter in a conventional FM receiver. When the optimized electric pulse is received and processed by the post detection low pass filter of the conventional FM receiver, a pulse shape exhibiting minimal intersymbol interference is produced.
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公开(公告)号：DE3853782D1
公开(公告)日：1995-06-14
申请号：DE3853782
申请日：1988-12-16
Applicant: MOTOROLA INC
Inventor： LEITCH CLIFFORD
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公开(公告)号：DE3889106D1
公开(公告)日：1994-05-19
申请号：DE3889106
申请日：1988-01-11
Applicant: MOTOROLA INC
Inventor： STEEL FRANCIS , LEITCH CLIFFORD , SUAREZ JOSE
IPC: H04L23/02 , H04L25/03 , H04L27/20 , H04L27/34 , H04L27/36 , H04L27/38 , H04L25/49 , H04L5/12 , H04B1/02
Abstract: A method and apparatus are provided for generating a uniquely shaped prototype digital pulse which is transmitted with minimal frequency spectrum consumption and yet a relatively high bit rate. Such uniquely shaped digital pulse is stored in a memory included in a transmitter until transmission is desired, at which time a positive of the pulse is transmitted to correspond to a first logic level or the negative of the pulse is transmitted to correspond to a second logic level.
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