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公开(公告)号：IE67260B1
公开(公告)日：1996-03-06
申请号：IE304586
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 , WASTLING 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 , H04L27/20
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：SE528439C2
公开(公告)日：2006-11-14
申请号：SE0401973
申请日：2004-08-03
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , EARLAM SANDRA J K , SMETANA BRUCE A , AVIS GRAHAM M , JOHNSON KARLE J , WESTLING GREGORY L
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公开(公告)号：SE527060C2
公开(公告)日：2005-12-13
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
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公开(公告)号：DK175672B1
公开(公告)日：2005-01-10
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 , SMETANA BRUCE A , WESTLING GREGORY L , JOHNSON KARLE J
Abstract: A base-band processor provides control of conversion of PCM signals at one bit rate to other bit rates. It converts received digital signals to voice signals and vice versa. It also provides echo cancellation where it uses dynamic memory to store received signals. PROM's store the echo cancellation program information as well as that for utilisation of the processor as a control processor. As a control processor it signals to the frequency synthesiser the frequency of operation for communication to the base station. The processor is directly coupled to a modem processor which is able to access the base band processor memory. This processor sends its signal at a predetermined sampling rate which are converted to analogue signals. The analogue signals are subjected to a cancellation process to reduce distortion. These signals are converted to an IF for addition to the synthesiser frequency to result in an HF signal for transmission.
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公开(公告)号：SE0401973A
公开(公告)日：2004-08-03
申请号：SE0401973
申请日：2004-08-03
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , EARLAM SANDRA J K , SMETANA BRUCE A
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 , H04L27/06 , H04M1/03 , H04Q7/32
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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Patent Agency Ranking
公开(公告)号：SE9902040L
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 , H04M1/03 , H04Q7/32
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：AU570152B1
公开(公告)日：1988-03-03
申请号：AU6429786
申请日：1986-10-21
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 , H03M7/36 , H03M1/08 , H04L5/22 , H03B21/02 , H03D7/00
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：SE0401973D0
公开(公告)日：2004-08-03
申请号：SE0401973
申请日：2004-08-03
Applicant: INTERDIGITAL TECH CORP
Inventor： CRITCHLOW DAVID N , EARLAM SANDRA J K , SMETANA BRUCE A
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 , H04L27/06 , H04M1/03 , H04Q7/32
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：SE0400130L
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：IE67262B1
公开(公告)日：1996-03-06
申请号：IE383591
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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