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1.发明授权Subscriber rf telephone system for providing multiple speech and/or data signals simultaneously over either a signal or a plurality of rf channels 失效用户rf电话系统，用于在信号或多个频道上同时提供多个语音和/或数据信号
公开(公告)号：US5022024B1
公开(公告)日：1999-06-22
申请号：US34930189
申请日：1989-05-08
Applicant: INTERDIGITAL TECH CORP
Inventor： PANETH ERIC , HANDZEL MARK J , MORLEY STEVEN A , AVIS GRAHAM M
IPC: H04L29/02 , H04B7/005 , H04B7/04 , H04B7/08 , H04B7/26 , H04J3/00 , H04J3/06 , H04J3/16 , H04J4/00 , H04L1/00 , H04L1/06 , H04L1/16 , H04L1/18 , H04L5/14 , H04L5/22 , H04L12/56 , H04L27/18 , H04M20060101 , H04M1/00 , H04M3/00 , H04M11/00 , H04M11/06 , H04Q3/42 , H04Q3/58 , H04Q3/62 , H04Q11/04 , H04W4/18 , H04W12/02 , H04W12/10 , H04W28/04 , H04W28/06 , H04W28/14 , H04W28/24 , H04W28/26 , H04W36/06 , H04W36/12 , H04W40/02 , H04W52/00 , H04W56/00 , H04W72/04 , H04W72/12 , H04W74/00 , H04W74/04 , H04W76/02 , H04W84/00 , H04W84/08 , H04W84/14 , H04W88/02 , H04W88/08
CPC classification number: H04W84/14 , H04B7/04 , H04B7/0865 , H04J3/0647 , H04J3/0682 , H04L1/0001 , H04L1/0003 , H04L1/0007 , H04L1/0026 , H04L1/0057 , H04L1/0061 , H04L1/0084 , H04L1/06 , H04L1/08 , H04L1/1642 , H04L1/18 , H04L1/188 , H04L1/1887 , H04L5/143 , H04W4/18 , H04W24/00 , H04W28/06 , H04W28/14 , H04W28/24 , H04W28/26 , H04W36/12 , H04W40/02 , H04W52/0216 , H04W52/20 , H04W56/00 , H04W72/02 , H04W72/04 , H04W72/042 , H04W72/044 , H04W72/0446 , H04W72/0453 , H04W72/12 , H04W74/04 , H04W76/02 , H04W84/00 , H04W88/08 , Y02D70/00 , Y02D70/30 , Y02D70/444
Abstract: A master station communicates with the main network, whilst a set of mobile or fixed sub stations of voice or data users share the channel using time division multiplexing. The number of time division channels available depends on the quality of the transmission links, power and modulation index. The rate of errors is detected to maintain a specified condition of operation. When all available channels are occupied a busy signal is transmitted by the master station. The effect of multiplexing on the sub-links gives apparent simultaneous bidirectional transmission.
Abstract translation: 主站与主网络通信，而一组语音或数据用户的移动或固定子站利用时分复用共享信道。 可用的时分信道数量取决于传输链路的质量，功率和调制指数。 检测到错误率以维持指定的操作条件。 当所有可用信道占用时，主站发送忙信号。 多路复用对子链路的影响提供了明显的同时双向传输。
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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：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.
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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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Patent Agency Ranking
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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公开(公告)号：DK172084B1
公开(公告)日：1997-10-13
申请号：DK130088
申请日：1988-03-10
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 , H04Q7/30
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.
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9.发明专利
公开(公告)号：CA1339157C
公开(公告)日：1997-07-29
申请号：CA615508
申请日：1989-10-04
Applicant: INTERDIGITAL TECH CORP
Inventor： AVIS GRAHAM M , COLLINS TERRANCE STEPHEN , SCHROEDER MARTIN KEITH , KIERNAN BRIAN GREGORY , MECHLING JONATHAN WILLIS
Abstract: A base station in a subscriber communication network for communicating signals between subscriber stations and an external communication network having a plurality of ports. The base station includes a communication circuit for enabling simultaneous communications between a plurality of the ports and a plurality of subscriber stations over a given communication channel having multiple sequentially repetitive time slots, with predetermined time slots being assigned respectively to predetermined subscribers stations; a remote-connection processor for directing communications between the time slot assigned to a given subscriber station and a given external communication network port; and an exchange for connecting the communication circuit to the external communication network ports. The exchange includes a central concentrator for directing signals from predetermined external network ports to predetermined sequentially repetitive time slots in a bit stream generated by the central concentrator, and for directing signals to predetermined external network ports from predetermined sequentially repetitive time slots in a bit stream received by the central concentrator; and the remote-connection processor directs signal transfer between given sequentially repetitive time slots of the bit streams and given sequentially repetitive time slots of the communication channel. The remote-connection processor includes a remote concentrator for directing signals from predetermined remote ports to predetermined sequentially repetitive time slots in a bit stream generated by the remote concentrator and transmitted to the central concentrator, and for directing signals to predetermined remote ports from predetermined sequentially repetitive time slots in the bit stream generated by the central concentrator; and a buffer unit connected to the remote ports for directing signals between predetermined remote ports and predetermined communication channel time slots. The exchange may be located remotely from the communication circuit; and the bitstream may be transmitted between the exchange and the communication circuit by microwave.
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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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