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公开(公告)号：AU5257296A
公开(公告)日：1996-11-21
申请号：AU5257296
申请日：1996-03-21
Applicant: MOTOROLA INC
Inventor： COMROE RICHARD , FURTAW ROBERT W , GANNON MARK A , HAYNER DAVID A , STUCKMAN BRUCE E , ZIOLKO ERIC
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公开(公告)号：DE69131503T2
公开(公告)日：2000-03-23
申请号：DE69131503
申请日：1991-12-16
Applicant: MOTOROLA INC
Inventor： WILSON ALAN , CUDAK MARK , HIBEN BRADLEY , ZIOLKO ERIC , JASPER STEVEN
Abstract: A transceiver compatible with both wide channel constant envelope 4 level FSK FM modulation and narrow channel pi /4 differential QPSK linear modulation allows compatible interaction between modified constant envelope and non-constant envelope transmitters. All Nyquist filtering occurs in the transmitters, and none in the receiver.
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公开(公告)号：DE68926670T2
公开(公告)日：1996-12-19
申请号：DE68926670
申请日：1989-01-03
Applicant: MOTOROLA INC
Inventor： DABBISH EZZAT , BYRNS JOHN , MCCLAUGHRY MICHAEL , PUHL LARRY , BROWN DANIEL , ZIOLKO ERIC , BRIGHT MICHAEL
Abstract: A cryptographic apparatus for encrypting and decrypting digital words includes a mechanism that permits a cipher algorithm to be electronically stored after the manufacture of the apparatus. The storing mechanism includes at least one electrically erasable, programmable gate array containing a portion of the cipher algorithm and at least one random access memory device coupled to the array for storing digital data generated by the algorithm. A mechanism which is coupled to the gate array and memory device controls the execution of the algorithm for each digital word thereby decrypting encrypted digital words and encrypting non-encrypted digital words.
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Patent Agency Ranking
公开(公告)号：DE69131167T2
公开(公告)日：1999-11-11
申请号：DE69131167
申请日：1991-12-17
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD , KOTZIN MICHAEL , SCHULER JOSEPH , ZIOLKO ERIC
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.
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公开(公告)号：DE68926670D1
公开(公告)日：1996-07-18
申请号：DE68926670
申请日：1989-01-03
Applicant: MOTOROLA INC
Inventor： DABBISH EZZAT , BYRNS JOHN , MCCLAUGHRY MICHAEL , PUHL LARRY , BROWN DANIEL , ZIOLKO ERIC , BRIGHT MICHAEL
Abstract: A cryptographic apparatus for encrypting and decrypting digital words includes a mechanism that permits a cipher algorithm to be electronically stored after the manufacture of the apparatus. The storing mechanism includes at least one electrically erasable, programmable gate array containing a portion of the cipher algorithm and at least one random access memory device coupled to the array for storing digital data generated by the algorithm. A mechanism which is coupled to the gate array and memory device controls the execution of the algorithm for each digital word thereby decrypting encrypted digital words and encrypting non-encrypted digital words.
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公开(公告)号：DE69131503D1
公开(公告)日：1999-09-09
申请号：DE69131503
申请日：1991-12-16
Applicant: MOTOROLA INC
Inventor： WILSON ALAN , CUDAK MARK , HIBEN BRADLEY , ZIOLKO ERIC , JASPER STEVEN
Abstract: A transceiver compatible with both wide channel constant envelope 4 level FSK FM modulation and narrow channel pi /4 differential QPSK linear modulation allows compatible interaction between modified constant envelope and non-constant envelope transmitters. All Nyquist filtering occurs in the transmitters, and none in the receiver.
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公开(公告)号：DE69131167D1
公开(公告)日：1999-05-27
申请号：DE69131167
申请日：1991-12-17
Applicant: MOTOROLA INC
Inventor： LABEDZ GERALD , KOTZIN MICHAEL , SCHULER JOSEPH , ZIOLKO ERIC
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.
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公开(公告)号：AU5524796A
公开(公告)日：1996-11-21
申请号：AU5524796
申请日：1996-03-21
Applicant: MOTOROLA INC
Inventor： COMROE RICHARD , FURTAW ROBERT W , GANNON MARK A , HAYNER DAVID A , STUCKMAN BRUCE E , ZIOLKO ERIC
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