公开(公告)号：CA2320638C

公开(公告)日：2004-04-27

申请号：CA2320638

申请日：1991-12-03

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: H04B1/7097 ,  H04B1/69 ,  H04W80/00 ,  H04B7/216 ,  H04Q7/36

Abstract: A spread spectrum CDMA communications system for communicating data and/or digitized voice between a plurality of users to a plurality of PCN units. The spread spectrum communications system is located within a same geographical region as occupied by an existing FDMA, proposed TDMA or any other mobile cellular system. The spread spectrum CDMA communications system includes a plurality of PCN-base stations and a plurality of PCN units. A PCN-base station has a comb filter (333) for notch filtering predetermined channels of the mobile cellular system, a device for converting the format of the data into a form suitable for communicating over radio waves, a spread spectrum modulator for spread spectrum processing the data, and a transmitter for transmitting the spread spectrum processed converted data from the PCN-base station to a PCN unit. The PCN-base station also has an antenna, and spread spectrum detectors (334) for recovering data communicated from the PCN units. A PCN nit has an antenna (330), and a detector coupled to the antenna for recovering data communicated from PCN-base station. The detector includes a spread spectrum demodulator (334). Also, the PCN unit has a device for converting the format of the data into a form suitable for communicating over radio waves, a spread spectrum modulator and a transmitter.

公开(公告)号：HK1055043A1

公开(公告)日：2003-12-19

申请号：HK03105523

申请日：2003-07-31

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: H04B1/707 ,  H04B1/7093 ,  H04B7/216 ,  H04B7/26 ,  H04M3/56 ,  H04W88/08 ,  H04Q ,  H04B ,  H04M ,  H04L

Abstract: A communication unit for use in a spread-spectrum communication system having a plurality of the units which allow for simultaneous communication among of a plurality of active units, each communication unit comprising a command signal generator for generating a command signal; a transmitter for transmitting communication signals at one of two frequencies and for transmitting said command signal; and a receiver for receiving communication signals at one of said two frequencies and for receiving said command signal, whereby upon initiation of said command signal, said command signal is transmitted for receipt by all active units in the system and the unit transmitting said command signal receives communication signals at a selected frequency of said two frequencies and transmits communication signals at another frequency, and whereby upon reception of said command signal from another unit in the system, the unit receiving said command signal transmits a communication signal at said selected frequency of said two frequencies and receives communication signals at said another frequency.

公开(公告)号：HK1055023A1

公开(公告)日：2003-12-19

申请号：HK03105297

申请日：2003-07-22

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: G01S3/42 ,  H01Q3/22 ,  H01Q3/38 ,  H01Q3/26 ,  H04B1/10 ,  H04B1/26 ,  H04B1/69 ,  H04B1/707 ,  H04B7/08 ,  H04B15/00 ,  H04L1/06 ,  H04B ,  H01Q

Abstract: A phased array spread spectrum system for maximizing signal strength of a spread-spectrum signal with multipath through the use of a first RF/IF section 21, a second RF/IF section 22, a first digital delay device 27, a second digital delay device 28, a first summer 29, a second summer 30, a despreader 31, a magnitude device 32, a shift register 33, and a comparator 34. The first RF/IF section 21 receives a plurality of spread-spectrum signals and the second RF/IF section 22 receives a plurality of phased versions of the plurality of spread-spectrum signals. The first and second digital delay devices 27, 28 delay the received plurality of spread-spectrum signals with respect to the plurality of phased versions of the plurality of spread-spectrum signals by a plurality of delays. The first and second summers 29, 30 combine the delayed spread-spectrum signals and the plurality of phased versions of the plurality of spread-spectrum signals as a plurality of combined signals. The despreader 31 despreads the plurality of combined signals as a plurality of despread signals. The magnitude device 32 generates a plurality of magnitude values from the plurality of despread signals. The shift register 33 stores a plurality of previous-magnitude values previously generated by the magnitude device 32 and a plurality of present magnitude values presently generated by the magnitude device 32. The comparator 34 compares the previous-magnitude values and the present-magnitude values and, responsive to the comparison, outputs a plurality of comparison signals. The first and second digital delay devices 27, 28 respond to the plurality of comparison signals by lengthening or shortening the plurality of delays.

公开(公告)号：SE0302228D0

公开(公告)日：2003-08-18

申请号：SE0302228

申请日：2003-08-18

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: H04B1/707 ,  H04B1/7093 ,  H04B7/216 ,  H04B7/26 ,  H04M3/56 ,  H04W88/08 ,  H04J13/02

Abstract: A communication unit for use in a spread-spectrum communication system having a plurality of the units which allow for simultaneous communication among of a plurality of active units, each communication unit comprising a command signal generator for generating a command signal; a transmitter for transmitting communication signals at one of two frequencies and for transmitting said command signal; and a receiver for receiving communication signals at one of said two frequencies and for receiving said command signal, whereby upon initiation of said command signal, said command signal is transmitted for receipt by all active units in the system and the unit transmitting said command signal receives communication signals at a selected frequency of said two frequencies and transmits communication signals at another frequency, and whereby upon reception of said command signal from another unit in the system, the unit receiving said command signal transmits a communication signal at said selected frequency of said two frequencies and receives communication signals at said another frequency.

公开(公告)号：AT247346T

公开(公告)日：2003-08-15

申请号：AT95925568

申请日：1995-06-16

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: H04B1/707 ,  H04B1/7093 ,  H04B7/216 ,  H04B7/26 ,  H04M3/56 ,  H04W88/08 ,  H04L12/18

Abstract: A communication unit for use in a spread-spectrum communication system having a plurality of the units which allow for simultaneous communication among of a plurality of active units, each communication unit comprising a command signal generator for generating a command signal; a transmitter for transmitting communication signals at one of two frequencies and for transmitting said command signal; and a receiver for receiving communication signals at one of said two frequencies and for receiving said command signal, whereby upon initiation of said command signal, said command signal is transmitted for receipt by all active units in the system and the unit transmitting said command signal receives communication signals at a selected frequency of said two frequencies and transmits communication signals at another frequency, and whereby upon reception of said command signal from another unit in the system, the unit receiving said command signal transmits a communication signal at said selected frequency of said two frequencies and receives communication signals at said another frequency.

公开(公告)号：HK1050966A1

公开(公告)日：2003-07-11

申请号：HK03102489

申请日：2003-04-08

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L ,  KOWALSKI JOHN ,  MOSHAVI SHIMON

IPC: H04B1/10 ,  H04B1/12 ,  H04B1/707 ,  H04B1/709 ,  H04B1/7093 ,  H04B1/7107 ,  H04B7/216 ,  H04L7/00 ,  H04J

公开(公告)号：HK1050965A1

公开(公告)日：2003-07-11

申请号：HK03102488

申请日：2003-04-08

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L ,  KOWALSKI JOHN ,  MOSHAVI SHIMON

IPC: H04B1/10 ,  H04B1/12 ,  H04B1/707 ,  H04B1/709 ,  H04B1/7093 ,  H04B1/7107 ,  H04B7/216 ,  H04L7/00 ,  H04J

公开(公告)号：SE0301545L

公开(公告)日：2003-05-27

申请号：SE0301545

申请日：2003-05-27

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: G01S3/42 ,  H01Q3/22 ,  H01Q3/38 ,  H01Q3/26 ,  H04B1/10 ,  H04B1/26 ,  H04B1/69 ,  H04B1/707 ,  H04B7/08 ,  H04B15/00 ,  H04L1/06

Abstract: A phased array spread spectrum system for maximizing signal strength of a spread-spectrum signal with multipath through the use of a first RF/IF section 21, a second RF/IF section 22, a first digital delay device 27, a second digital delay device 28, a first summer 29, a second summer 30, a despreader 31, a magnitude device 32, a shift register 33, and a comparator 34. The first RF/IF section 21 receives a plurality of spread-spectrum signals and the second RF/IF section 22 receives a plurality of phased versions of the plurality of spread-spectrum signals. The first and second digital delay devices 27, 28 delay the received plurality of spread-spectrum signals with respect to the plurality of phased versions of the plurality of spread-spectrum signals by a plurality of delays. The first and second summers 29, 30 combine the delayed spread-spectrum signals and the plurality of phased versions of the plurality of spread-spectrum signals as a plurality of combined signals. The despreader 31 despreads the plurality of combined signals as a plurality of despread signals. The magnitude device 32 generates a plurality of magnitude values from the plurality of despread signals. The shift register 33 stores a plurality of previous-magnitude values previously generated by the magnitude device 32 and a plurality of present magnitude values presently generated by the magnitude device 32. The comparator 34 compares the previous-magnitude values and the present-magnitude values and, responsive to the comparison, outputs a plurality of comparison signals. The first and second digital delay devices 27, 28 respond to the plurality of comparison signals by lengthening or shortening the plurality of delays.

公开(公告)号：SE0301545D0

公开(公告)日：2003-05-27

申请号：SE0301545

申请日：2003-05-27

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: G01S3/42 ,  H01Q3/22 ,  H01Q3/38 ,  H01Q3/26 ,  H04B1/10 ,  H04B1/26 ,  H04B1/69 ,  H04B1/707 ,  H04B7/08 ,  H04B15/00 ,  H04L1/06

Abstract: A phased array spread spectrum system for maximizing signal strength of a spread-spectrum signal with multipath through the use of a first RF/IF section 21, a second RF/IF section 22, a first digital delay device 27, a second digital delay device 28, a first summer 29, a second summer 30, a despreader 31, a magnitude device 32, a shift register 33, and a comparator 34. The first RF/IF section 21 receives a plurality of spread-spectrum signals and the second RF/IF section 22 receives a plurality of phased versions of the plurality of spread-spectrum signals. The first and second digital delay devices 27, 28 delay the received plurality of spread-spectrum signals with respect to the plurality of phased versions of the plurality of spread-spectrum signals by a plurality of delays. The first and second summers 29, 30 combine the delayed spread-spectrum signals and the plurality of phased versions of the plurality of spread-spectrum signals as a plurality of combined signals. The despreader 31 despreads the plurality of combined signals as a plurality of despread signals. The magnitude device 32 generates a plurality of magnitude values from the plurality of despread signals. The shift register 33 stores a plurality of previous-magnitude values previously generated by the magnitude device 32 and a plurality of present magnitude values presently generated by the magnitude device 32. The comparator 34 compares the previous-magnitude values and the present-magnitude values and, responsive to the comparison, outputs a plurality of comparison signals. The first and second digital delay devices 27, 28 respond to the plurality of comparison signals by lengthening or shortening the plurality of delays.

公开(公告)号：SE519437C2

公开(公告)日：2003-02-25

申请号：SE9604710

申请日：1996-12-20

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: H04B1/707 ,  H04B1/7093 ,  H04B7/216 ,  H04B7/26 ,  H04M3/56 ,  H04W88/08 ,  H04J13/04

Abstract: A communication unit for use in a spread-spectrum communication system having a plurality of the units which allow for simultaneous communication among of a plurality of active units, each communication unit comprising a command signal generator for generating a command signal; a transmitter for transmitting communication signals at one of two frequencies and for transmitting said command signal; and a receiver for receiving communication signals at one of said two frequencies and for receiving said command signal, whereby upon initiation of said command signal, said command signal is transmitted for receipt by all active units in the system and the unit transmitting said command signal receives communication signals at a selected frequency of said two frequencies and transmits communication signals at another frequency, and whereby upon reception of said command signal from another unit in the system, the unit receiving said command signal transmits a communication signal at said selected frequency of said two frequencies and receives communication signals at said another frequency.