公开(公告)号：HK1066657A1

公开(公告)日：2005-03-24

申请号：HK04109358

申请日：2004-11-26

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L ,  MOSHAVI SHIMON ,  KOWALSKI JOHN

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

公开(公告)号：FI114595B

公开(公告)日：2004-11-15

申请号：FI965222

申请日：1996-12-27

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

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

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：ES2136582T3

公开(公告)日：2004-05-01

申请号：ES95925568

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：HK1055024A1

公开(公告)日：2003-12-19

申请号：HK03105298

申请日：2003-07-22

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

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

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：DK0767993T3

公开(公告)日：2003-10-06

申请号：DK95925568

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：ES2137140T3

公开(公告)日：2003-05-16

申请号：ES95927544

申请日：1995-07-05

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 ,  H04J13/02

公开(公告)号：AT223113T

公开(公告)日：2002-09-15

申请号：AT95926635

申请日：1995-06-16

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: H01Q3/38 ,  G01S3/42 ,  H01Q3/22 ,  H01Q3/26 ,  H04B1/10 ,  H04B1/26 ,  H04B1/69 ,  H04B1/707 ,  H04B7/08 ,  H04B15/00 ,  H04L1/06 ,  H04K1/00 ,  H04K1/10 ,  H04L27/30

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：CA2342454C

公开(公告)日：2002-09-03

申请号：CA2342454

申请日：1995-07-05

Applicant: INTERDIGITAL TECH CORP

Inventor： KOWALSKI JOHN ,  SCHILLING DONALD L ,  MOSHAVI SHIMON

IPC: H04B1/10 ,  H04B1/12 ,  H04B1/707 ,  H04B1/709 ,  H04B1/7093 ,  H04B1/7107 ,  H04B7/216 ,  H04L7/00 ,  H04B1/69

Abstract: A spread-spectrum CDMA interference canceler for reducing interference in a DS/CDMA receiver having N chip-code channels. The interference canceler includes a plurality of correlators, a plurality of spread-spectrum-processi ng circuits, subtracting circuits, and channel correlators. Using a plurality o f chip- code signals generated from chip codeword signal generators, the correlators despreads the spread-spectrum CDMA signal as a plurality of despread signals . The plurality of spread-spectrum-processing circuits uses a timed version of the plurality of chip-code signals generated from the delay devices, for spread- spectrum processing the plurality of despread signals. For recovering a code channel using an i th chip-code-signal, the subtracting circuits subtracts from the spread-spectrum CDMA signal, each of the N-1 spread-spectrum-processed- despread signals thereby generating a subtracted signal. The channel- correlator despreads the subtracted signal.

公开(公告)号：CA2107865C

公开(公告)日：2001-02-13

申请号：CA2107865

申请日：1993-10-06

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: G06K17/00 ,  G06Q20/04 ,  G06Q20/26 ,  G06Q20/32 ,  G06Q20/36 ,  G07F7/08 ,  H04M17/00 ,  H04B7/24 ,  G07F19/00 ,  H04M11/00

Abstract: A wireless debit card communications system comprising a radio unit, a base station, and an end station. The radio unit, for example, a radio telephone, includes a first processor, a reader for reading a credit amount and a personal access number from a debit card, and a transceiver for communicating, using radio waves, a credit signal. The base station receives and relays the credit signal over a communications channel to the end station. The end station includes a switch to generate a first control signal to allocate the credit amount of the debit card to the radio unit, and to set a radio unit access number of the radio unit to the personal access number of the debit card with a communications path through the base station. The end station also generates a second control signal for changing the credit amount and the personal access number of the debit card. The base station may be connected to a debit meter. The radio unit and the debit meter respond to the second control signal to change the credit amount and the personal access number using magnetic writers or writer processors to store an updated credit amount and personal access number on a magnetic strip on a debit card or on a chip on the debit card as the debit card is used in the radio unit. The personal access number may be used as a telephone number of the radio unit.

公开(公告)号：ES2137902T3

公开(公告)日：2000-12-01

申请号：ES92903307

申请日：1991-12-03

Applicant: INTERDIGITAL TECH CORP

Inventor： SCHILLING DONALD L

IPC: G01S5/00 ,  G01S5/14 ,  G01S13/82 ,  G01S19/16 ,  G01S19/48 ,  H04B1/707 ,  H04B1/71 ,  H04B7/005 ,  H04B7/185 ,  H04B7/216 ,  H04B7/26 ,  H04J13/00 ,  H04W16/02 ,  H04W52/34

Abstract: A spread spectrum code division multiple access (CDMA) receiver for receiving data from a spread spectrum CDMA transmitter in a same geographic region as covered by a cellular system, the cellular system communicating using a plurality of predetermined frequency bandwidths, is disclosed. The receiver is characterized by means (149, 140, 147, 141, 169, 161, 163, 330, 331, 332) for receiving a spread spectrum CDMA data signal from said CDMA transmitter, the CDMA data signal having a wide bandwidth overlaying said plurality of predetermined frequency bandwidths, means (143, 333) for notch filtering the received CDMA data signal at said plurality of predetermined frequency bandwidths, and means (145, 165, 334, 335) for recovering data from said notch filtered CDMA data signal. A method of receiving data is also disclosed.