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公开(公告)号：JPH10290188A
公开(公告)日：1998-10-27
申请号：JP3049698
申请日：1998-01-28
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
IPC: H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
Abstract: PROBLEM TO BE SOLVED: To attain miniaturization and price-down and to improve performance by comparing the training signal of the time multiplexed I and Q sampled with a desired output and generating a frequency correct signal for synchronism error and frequency output error correction. SOLUTION: The input of the line 116 includes the time multiplexed I and Q samples in the form of two paired complex samples per the symbol, and is inputted to a MODEM processor 40 and demodulated. The demodulated I and Q samples are applied to an equalizer module and minimize the error energy of received data stream, the correction error energy of delayed data stream, the correction error energy of selected data stream and data stream energy from upside and downside adjacent channels. The training signal for this purpose is generated and impressed and a weight coefficient is provided and stored in an RAM 32 so that a high-stability equalizer composed of a little parts is provided.
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公开(公告)号：SE518848C2
公开(公告)日：2002-11-26
申请号：SE9402221
申请日：1994-06-23
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
IPC: H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38 , H04L27/01
Abstract: A subscriber unit for a wireless digital telephone system is disclosed. An equalizer for receiving I and Q samples is disclosed which is in the form. The I and Q samples are complex sample pairs provided at a frequency. The equalizer receives a training signal in the form of complex I and Q sample pairs. A training signal is affected by undesirable characteristics that might be present in the I and Q samples. A comparator compares the actual input training signal with the desired output to obtain a set of weighting coefficients for the equalizer to produce the desired output. A frequency correction circuit provides a corrected frequency signal for the frequency of the sample pairs from the weighting coefficients.
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公开(公告)号：SE9902040D0
公开(公告)日：1999-06-03
申请号：SE9902040
申请日：1999-06-03
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHCLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
IPC: H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38 , H04L
Abstract: A subscriber unit for a wireless digital telephone system is disclosed. An equalizer for receiving I and Q samples is disclosed which is in the form. The I and Q samples are complex sample pairs provided at a frequency. The equalizer receives a training signal in the form of complex I and Q sample pairs. A training signal is affected by undesirable characteristics that might be present in the I and Q samples. A comparator compares the actual input training signal with the desired output to obtain a set of weighting coefficients for the equalizer to produce the desired output. A frequency correction circuit provides a corrected frequency signal for the frequency of the sample pairs from the weighting coefficients.
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公开(公告)号：IE67263B1
公开(公告)日：1996-03-06
申请号：IE383691
申请日：1986-11-18
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
IPC: H04J20060101 , H04J3/12 , H04L20060101 , H04L27/00 , H04L27/20 , H04Q7/00
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公开(公告)号：SE9402221L
公开(公告)日：1994-06-23
申请号：SE9402221
申请日：1994-06-23
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
IPC: H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38 , H04L27/01
Abstract: A subscriber unit for a wireless digital telephone system is disclosed. An equalizer for receiving I and Q samples is disclosed which is in the form. The I and Q samples are complex sample pairs provided at a frequency. The equalizer receives a training signal in the form of complex I and Q sample pairs. A training signal is affected by undesirable characteristics that might be present in the I and Q samples. A comparator compares the actual input training signal with the desired output to obtain a set of weighting coefficients for the equalizer to produce the desired output. A frequency correction circuit provides a corrected frequency signal for the frequency of the sample pairs from the weighting coefficients.
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Patent Agency Ranking
公开(公告)号：SE9402221D0
公开(公告)日：1994-06-23
申请号：SE9402221
申请日：1994-06-23
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
IPC: H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38
Abstract: A subscriber unit for a wireless digital telephone system is disclosed. An equalizer for receiving I and Q samples is disclosed which is in the form. The I and Q samples are complex sample pairs provided at a frequency. The equalizer receives a training signal in the form of complex I and Q sample pairs. A training signal is affected by undesirable characteristics that might be present in the I and Q samples. A comparator compares the actual input training signal with the desired output to obtain a set of weighting coefficients for the equalizer to produce the desired output. A frequency correction circuit provides a corrected frequency signal for the frequency of the sample pairs from the weighting coefficients.
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公开(公告)号：SE0400130D0
公开(公告)日：2004-01-23
申请号：SE0400130
申请日：2004-01-23
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
IPC: H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38 , H04Q7/32 , H04M1/03
Abstract: A subscriber unit for a wireless digital telephone system is disclosed. An equalizer for receiving I and Q samples is disclosed which is in the form. The I and Q samples are complex sample pairs provided at a frequency. The equalizer receives a training signal in the form of complex I and Q sample pairs. A training signal is affected by undesirable characteristics that might be present in the I and Q samples. A comparator compares the actual input training signal with the desired output to obtain a set of weighting coefficients for the equalizer to produce the desired output. A frequency correction circuit provides a corrected frequency signal for the frequency of the sample pairs from the weighting coefficients.
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公开(公告)号：SE0400130A
公开(公告)日：2004-01-23
申请号：SE0400130
申请日：2004-01-23
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
IPC: H04B7/26 , H03D3/00 , H03D7/16 , H03H17/06 , H03L7/095 , H04B1/38 , H04B1/50 , H04B7/005 , H04L27/152 , H04L27/18 , H04L27/22 , H04L27/233 , H04M1/00 , H04M1/253 , H04M1/725 , H04M11/06 , H04Q7/20 , H04Q7/38 , H04Q7/32 , H04M1/03
CPC classification number: H04M1/72502 , H03D3/006 , H03D3/007 , H03D7/161 , H03D7/165 , H03D2200/005 , H03D2200/0052 , H03D2200/0058 , H03D2200/0062 , H03D2200/0082 , H03H17/0657 , H03L7/095 , H04B1/50 , H04L27/1525 , H04L27/2338
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公开(公告)号：DE3644066C2
公开(公告)日：2000-03-02
申请号：DE3644066
申请日：1986-12-22
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
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公开(公告)号：DK199801517A
公开(公告)日：1998-11-19
申请号：DKPA199801517
申请日：1998-11-19
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , AVIS GRAHAM M , EARLAM SANDRA J K , JOHNSON KARLE J , SMETANA BRUCE A , WESTLING GREGORY L
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