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公开(公告)号：JP2003179659A
公开(公告)日：2003-06-27
申请号：JP2002336319
申请日：2002-11-20
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , LERY SCOTT A , FOX JOHN M
Abstract: PROBLEM TO BE SOLVED: To provide a QAM communication system in which data can be communicated in any one of a plurality of QAM modes, such as 16-QAM, 32-QAM and 64-QAM (30). SOLUTION: A receiver (70) detects the particular QAM mode transmitted on a trial and error basis, by attempting to decode received data using different QAM modes until a synchronization condition is detected. The synchronization condition can required that a plurality of different synchronization tests be met. In a specific embodiment, a first synchronization test is met when a renormalization rate of a trellis decoder (90) is below a threshold value. A second synchronization test is met when a first synchronization word is detected in the received data. A third and final synchronization test is met when a second synchronization word is detected in the received data. In order to reduce the cost of the receiver, most of the QAM mode dependent components are implemented using look-up tables stored in PROMs. COPYRIGHT: (C)2003,JPO
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公开(公告)号：DE69329264T2
公开(公告)日：2001-04-26
申请号：DE69329264
申请日：1993-07-03
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , FOX JOHN M , LERY SCOTT A
Abstract: An interleaver (34) processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver (42). The pseudorandom interleaved data is processed at the deinterleaver (42) in a pseudorandom order corresponding to that used at the interleaver (34) means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaver on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder (44) receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are detected in data output from the deinterleaver to meet a predetermined criterion. In another embodiment, a timer is used to initiate a new starting address for the pseudorandom processing at the deinterleaver during successive time intervals. Synchronization is achieved when a start address is found that results in the detection of enough synchronization words in data output from the deinterleaver to meet a predetermined synchronization criterion.
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公开(公告)号：MX9304826A
公开(公告)日：1994-02-28
申请号：MX9304826
申请日：1993-08-09
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , FOX JOHN M , LERY SCOTT A
Abstract: An interleaver (34) processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver (42). The pseudorandom interleaved data is processed at the deinterleaver (42) in a pseudorandom order corresponding to that used at the interleaver (34) means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaver on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder (44) receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are detected in data output from the deinterleaver to meet a predetermined criterion. In another embodiment, a timer is used to initiate a new starting address for the pseudorandom processing at the deinterleaver during successive time intervals. Synchronization is achieved when a start address is found that results in the detection of enough synchronization words in data output from the deinterleaver to meet a predetermined synchronization criterion.
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公开(公告)号：NO932828A
公开(公告)日：1994-02-11
申请号：NO932828
申请日：1993-08-09
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , FOX JOHN M , LERY SCOTT A
CPC classification number: H03M13/2732 , H03M13/33
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公开(公告)号：NO931053D0
公开(公告)日：1993-03-23
申请号：NO931053
申请日：1993-03-23
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , LERY SCOTT A , FOX JOHN M
Abstract: A quadrature amplitude modulation (QAM) communication system is provided in which data can be communicated in any one of a plurality of QAM modes, such as 16-QAM, 32-QAM, and 64-QAM (30). A receiver (70) detects the particular QAM mode transmitted on a trial and error basis, by attempting to decode the received data using different QAM modes until a synchronization condition is detected. The synchronization condition can require that a plurality of different synchronization tests be met. In a specific embodiment, a first synchronization test is met when a renormalization rate of a trellis decoder (90) is below a threshold value. A second synchronization test is met when a first synchronization word is detected in the received data. A third and final synchronization test is met when a second synchronization word is detected in the received data. In order to reduce the cost of the receiver, most of the QAM mode dependent components (76, 80, 84, 90, 98, 102) are implemented using look-up tables stored in PROMs.
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Patent Agency Ranking
公开(公告)号：AT195834T
公开(公告)日：2000-09-15
申请号：AT93110651
申请日：1993-07-03
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , FOX JOHN M , LERY SCOTT A
Abstract: An interleaver (34) processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver (42). The pseudorandom interleaved data is processed at the deinterleaver (42) in a pseudorandom order corresponding to that used at the interleaver (34) means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaver on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder (44) receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are detected in data output from the deinterleaver to meet a predetermined criterion. In another embodiment, a timer is used to initiate a new starting address for the pseudorandom processing at the deinterleaver during successive time intervals. Synchronization is achieved when a start address is found that results in the detection of enough synchronization words in data output from the deinterleaver to meet a predetermined synchronization criterion.
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公开(公告)号：HK1008454A1
公开(公告)日：1999-05-07
申请号：HK98109060
申请日：1998-07-10
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , LERY SCOTT A , FOX JOHN M
Abstract: A quadrature amplitude modulation (QAM) communication system is provided in which data can be communicated in any one of a plurality of QAM modes, such as 16-QAM, 32-QAM, and 64-QAM (30). A receiver (70) detects the particular QAM mode transmitted on a trial and error basis, by attempting to decode the received data using different QAM modes until a synchronization condition is detected. The synchronization condition can require that a plurality of different synchronization tests be met. In a specific embodiment, a first synchronization test is met when a renormalization rate of a trellis decoder (90) is below a threshold value. A second synchronization test is met when a first synchronization word is detected in the received data. A third and final synchronization test is met when a second synchronization word is detected in the received data. In order to reduce the cost of the receiver, most of the QAM mode dependent components (76, 80, 84, 90, 98, 102) are implemented using look-up tables stored in PROMs.
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公开(公告)号：ES2113967T3
公开(公告)日：1998-05-16
申请号：ES93104294
申请日：1993-03-16
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , LERY SCOTT A , FOX JOHN M
Abstract: A quadrature amplitude modulation (QAM) communication system is provided in which data can be communicated in any one of a plurality of QAM modes, such as 16-QAM, 32-QAM, and 64-QAM (30). A receiver (70) detects the particular QAM mode transmitted on a trial and error basis, by attempting to decode the received data using different QAM modes until a synchronization condition is detected. The synchronization condition can require that a plurality of different synchronization tests be met. In a specific embodiment, a first synchronization test is met when a renormalization rate of a trellis decoder (90) is below a threshold value. A second synchronization test is met when a first synchronization word is detected in the received data. A third and final synchronization test is met when a second synchronization word is detected in the received data. In order to reduce the cost of the receiver, most of the QAM mode dependent components (76, 80, 84, 90, 98, 102) are implemented using look-up tables stored in PROMs.
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公开(公告)号：AU656297B2
公开(公告)日：1995-01-27
申请号：AU4132293
申请日：1993-06-17
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , FOX JOHN M , LERY SCOTT A
Abstract: An interleaver (34) processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver (42). The pseudorandom interleaved data is processed at the deinterleaver (42) in a pseudorandom order corresponding to that used at the interleaver (34) means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaver on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder (44) receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are detected in data output from the deinterleaver to meet a predetermined criterion. In another embodiment, a timer is used to initiate a new starting address for the pseudorandom processing at the deinterleaver during successive time intervals. Synchronization is achieved when a start address is found that results in the detection of enough synchronization words in data output from the deinterleaver to meet a predetermined synchronization criterion.
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公开(公告)号：AU4132293A
公开(公告)日：1994-02-17
申请号：AU4132293
申请日：1993-06-17
Applicant: GEN INSTRUMENT CORP
Inventor： PAIK WOO H , FOX JOHN M , LERY SCOTT A
Abstract: An interleaver (34) processes information in a pseudorandom order to provide pseudorandom interleaved data for communication to a deinterleaver (42). The pseudorandom interleaved data is processed at the deinterleaver (42) in a pseudorandom order corresponding to that used at the interleaver (34) means, to recover the original information. The pseudorandom processing at the deinterleaver is synchronized with the pseudorandom processing at the interleaver on a trial and error basis. In one embodiment, full synchronization occurs when a Viterbi decoder (44) receiving data from the deinterleaver has a renormalization rate within a designated threshold and when enough synchronization words are detected in data output from the deinterleaver to meet a predetermined criterion. In another embodiment, a timer is used to initiate a new starting address for the pseudorandom processing at the deinterleaver during successive time intervals. Synchronization is achieved when a start address is found that results in the detection of enough synchronization words in data output from the deinterleaver to meet a predetermined synchronization criterion.
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