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.

公开(公告)号：SE0400592L

公开(公告)日：2004-03-10

申请号：SE0400592

申请日：2004-03-10

Applicant: INTERDIGITAL TECH CORP

Inventor： AVIS GRAHAM M ,  COLLINS TERRANCE STEPHEN ,  SCHROEDER MARTIN KEITH ,  KIERNAN BRIAN GREGORY ,  MECHLING JONATHAN WILLIS ,  FLETCHER THOMAS E ,  AVIS WENDELINE R ,  SAFFEE GREGORY T ,  JOHNSON KARLE J

IPC: H04B7/00 ,  H04B7/26 ,  H04L12/56 ,  H04M20060101 ,  H04W24/00 ,  H04W28/06 ,  H04W72/04 ,  H04W74/04 ,  H04W84/08 ,  H04W84/14 ,  H04W88/08 ,  H04W92/02 ,  H04W92/12 ,  H04Q7/20

Abstract: The base station includes a communication circuit for enabling simultaneous communications between a number of ports and a number of the subscriber stations over a given communication channel having multiple sequentially repetitive time slots. An exchange is included to connect the communication circuit to the external communication network ports. A remote-connection process is coupled to the communication circuit by the exchange and by a base-station control channel occupying a selected one of the time slots for monitoring the status of the other time slots. The connection processor causes the communication circuit and the exchange to complete a connection between a given communication network port and a given subscriber station over a time slot assigned in response to the monitored status in accordance with a predetermined assignment routine.

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.

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.

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

公开(公告)号：HK83494A

公开(公告)日：1994-08-26

申请号：HK83494

申请日：1994-08-18

Applicant: INTERDIGITAL TECH CORP

Inventor： AVIS GRAHAM M ,  COLLINS TERRENCE STEPHEN ,  SCHROEDER MARTIN KEITH ,  KIERNAN BRIAN GREGORY ,  MECHLING JONATHAN WILLIS ,  FLETCHER THOMAS E ,  AVIS WENDELINE R ,  SAFFEE GREGORY T ,  JOHNSON KARLE J

IPC: H04B7/00 ,  H04B7/26 ,  H04L12/56 ,  H04M20060101 ,  H04W24/00 ,  H04W28/06 ,  H04W72/04 ,  H04W74/04 ,  H04W84/08 ,  H04W84/14 ,  H04W88/08 ,  H04W92/02 ,  H04W92/12 ,  H04Q11/04

Abstract: The base station includes a communication circuit for enabling simultaneous communications between a number of ports and a number of the subscriber stations over a given communication channel having multiple sequentially repetitive time slots. An exchange is included to connect the communication circuit to the external communication network ports. A remote-connection process is coupled to the communication circuit by the exchange and by a base-station control channel occupying a selected one of the time slots for monitoring the status of the other time slots. The connection processor causes the communication circuit and the exchange to complete a connection between a given communication network port and a given subscriber station over a time slot assigned in response to the monitored status in accordance with a predetermined assignment routine.

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.

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.

公开(公告)号：DE3845018B4

公开(公告)日：2008-04-30

申请号：DE3845018

申请日：1988-04-15

Applicant: INTERDIGITAL TECH CORP

Inventor： AVIS GRAHAM M ,  COLLINS TERRANCE STEPHEN ,  SCHROEDER MARTIN KEITH ,  KIERNAN BRIAN GREGORY ,  MECHL JONATHAN WILLIS ,  FLETCHER THOMAS E ,  AVIS WENDELINE R ,  SAFFEE GREGORY T ,  JOHNSON KARLE J

IPC: H04J3/00 ,  H04B7/00 ,  H04B7/26 ,  H04L12/00 ,  H04L12/56 ,  H04M20060101 ,  H04W24/00 ,  H04W28/06 ,  H04W72/04 ,  H04W74/04 ,  H04W84/08 ,  H04W84/14 ,  H04W88/08 ,  H04W92/02 ,  H04W92/12

Abstract: The base station includes a communication circuit for enabling simultaneous communications between a number of ports and a number of the subscriber stations over a given communication channel having multiple sequentially repetitive time slots. An exchange is included to connect the communication circuit to the external communication network ports. A remote-connection process is coupled to the communication circuit by the exchange and by a base-station control channel occupying a selected one of the time slots for monitoring the status of the other time slots. The connection processor causes the communication circuit and the exchange to complete a connection between a given communication network port and a given subscriber station over a time slot assigned in response to the monitored status in accordance with a predetermined assignment routine.

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.