公开(公告)号：JP2002026776A

公开(公告)日：2002-01-25

申请号：JP2001155235

申请日：2001-05-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MHIRSI KARIM ,  MUIRHEAD DAVID STUART ,  WOOD STEVEN ANDREW

IPC: H04B1/707 ,  H04B1/7115 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To provide a universal mobile phone system, adopting the WCDMA (wideband code division multiple access) technology or a wireless communication system which adopts the third generation general partnership program. SOLUTION: A code, in an incoming signal from a different source, is specified, using a code adaptive filter to apply cross-correlation on the code. A multiplexer samples signals from P-sets of sources at a rate of a multiple of P, with respect to a chip rate of the code in the incoming signal. The multiplexer applies time multiplex processing to the received signal and supplies the result to one delay line, consisting of N-stages and having P-sets of elements. Each stage stores one sampling value from among P-sets of sources. The selected element of each stage provides an output to an input, corresponding to a dot product summing chain of the code adaptive filter, so as to establish cross-correlation to each incoming signal.

公开(公告)号：JP2002190773A

公开(公告)日：2002-07-05

申请号：JP2001284225

申请日：2001-09-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LEE JUNG AH ,  WOOD STEVEN ANDREW ,  WROCLAWSKI GREGORY J ,  WYNN WOODSON DALE

IPC: H04B1/10 ,  H04B1/707 ,  H04B7/26

Abstract: PROBLEM TO BE SOLVED: To solve problems that a signal supplied to a shift register when a mobile station is moving at a high speed is quickly faded, phase distortion is introduced, the correlation of input signals or input sequences is lost, a low correlator output is generated when the input sequence is correlated with an expected sequence, the low correlator output does not exceed a detection threshold, and the received sequence cannot be detected. SOLUTION: A signal having a known sequence in a high speed fading environment is detected by using segmented correlator architecture. The input sequence of a sample or data is segmented to blocks correlated with individual segments of the known or expected sequence. The sum of correlator outputs is formed by adding the outputs of individual correlators. The absolute value of the sum is compared with a threshold to determine the detection time of the know input sequence. When the input sequence is segmented and the obtained segments are individually correlated with each other, action causing the loss of correlation of signals is reduced in the whole sequence.

公开(公告)号：JP2002111540A

公开(公告)日：2002-04-12

申请号：JP2001284240

申请日：2001-09-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LEE JUNG AH ,  WOOD STEVEN ANDREW ,  WROCLAWSKI GREGORY J ,  WYNN WOODSON DALE

IPC: H04B1/7075 ,  H04B1/709 ,  H04B1/707

Abstract: PROBLEM TO BE SOLVED: To solve the problem where when a mobile station is moving at high speed, a signal supplied to a shift register is subjected to fading at a high speed, where a sequence received by the shift register is damaged partially so as to generate a low fast-Hadamard transform(FHT) output, and where the FHT output to be compared with a threshold does not exceed the threshold and that a received signature sequence cannot be detected or discriminated. SOLUTION: A segmented correlator and an FHT architecture are used, and a known sequence is detected and discriminated in a high-speed fading environment. A sample or data input sequence is segmented into a block. Respective blocks are detected individually by using a correlator/FHT segment. Each sequence, which discriminates the output of each correlator/FHT segment, is added to the corresponding output of another correlator/FHT segment. Each sum is compared with the threshold, and whether a specific sequence is detected and discriminated is determined.

公开(公告)号：DE69930224T2

公开(公告)日：2006-12-14

申请号：DE69930224

申请日：1999-12-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GARYANTES MICHAEL FRANCIS ,  LU YUE ,  SABEL LESLEY PHILLIP ,  WOOD STEVEN ANDREW ,  ZANCAN MARIO

IPC: H04B1/707

Abstract: According to the present invention there is provided a method of recovering transmitted symbols in the receiver of a spread spectrum system, comprising: receiving a signal including multi-path components associated with a transmitted symbol; de-spreading successive portions of the received signal to provide a symbol estimate based on each multi-path, wherein at least one multi-path of the transmitted symbol is contained in separate portions, the de-spreading step further comprising determining a partial estimate of the transmitted symbol for the at least one multi-path component based on each part of the multi-path contained in each separate portion; and summing said partial estimates.

公开(公告)号：DE60028015T2

公开(公告)日：2007-04-19

申请号：DE60028015

申请日：2000-06-06

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MHIRSI KARIM ,  MUIRHEAD DAVID STUART ,  WOOD STEVEN ANDREW

IPC: H04B1/707 ,  H04B1/7115 ,  H04B7/02 ,  H04B7/08 ,  H04B7/26

Abstract: A third generation general partnership program radio communication system or a universal mobile telephone system employs a wide band code division multiple access system. The codes in various incoming signals from different sources are identified by cross correlation using a code matched filter. A multiplexer, samples the signals from each of the P sources at P times the chip rate of the codes in the incoming signals. The mutliplexer time multiplexes the received signals and feeds them to single delay line consisting of N stages each having P elements. Each stage will thus store one sample from each of the P sources. A selected element in each stage has an output which feeds a corresponding input of a code matched filter dot-product adder chain to enable a cross-correlation to be established for each incoming signal in turn.

公开(公告)号：AU1849999A

公开(公告)日：1999-09-16

申请号：AU1849999

申请日：1999-03-01

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ALLPRESS STEPHEN ALAN ,  WOOD STEVEN ANDREW ,  LIN JIE ,  FREIBERG LORENZ FRED ,  CAO QIANG

IPC: H04J3/00 ,  H04B7/26 ,  H04J3/16 ,  H04W36/00 ,  H04W48/12 ,  H04W72/14 ,  H04B7/212

Abstract: A time division multiple access communication system is disclosed, in which down link data are transmitted over a data channel in repeated time frames each containing a plurality of time slots. Down link set up information is transmitted over a control channel to indicate from which time slot a user terminal should extract data. Each frame on the data channel includes a user packet flag to indicate whether or not each time slot in the frame contains data. Each user terminal is responsive to the set up information and to the user packet flags to extract data from its assigned time slot in those frames which the slot is indicated to contain data.

公开(公告)号：AT326794T

公开(公告)日：2006-06-15

申请号：AT00304776

申请日：2000-06-06

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MHIRSI KARIM ,  MUIRHEAD DAVID STUART ,  WOOD STEVEN ANDREW

IPC: H04B1/707 ,  H04B1/7115 ,  H04B7/26 ,  H04B7/02 ,  H04B7/08

Abstract: A third generation general partnership program radio communication system or a universal mobile telephone system employs a wide band code division multiple access system. The codes in various incoming signals from different sources are identified by cross correlation using a code matched filter. A multiplexer, samples the signals from each of the P sources at P times the chip rate of the codes in the incoming signals. The mutliplexer time multiplexes the received signals and feeds them to single delay line consisting of N stages each having P elements. Each stage will thus store one sample from each of the P sources. A selected element in each stage has an output which feeds a corresponding input of a code matched filter dot-product adder chain to enable a cross-correlation to be established for each incoming signal in turn.

公开(公告)号：BR9901069A

公开(公告)日：1999-12-28

申请号：BR9901069

申请日：1999-03-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ALLPRESS STEPHEN ALAN ,  LIN JIE ,  WOOD STEVEN ANDREW ,  CAO QIANG ,  FREIBERG LORENZ FRED

IPC: H04J3/00 ,  H04B7/26 ,  H04J3/16 ,  H04W36/00 ,  H04W48/12 ,  H04W72/14

Abstract: A time division multiple access communication system is disclosed, in which down link data are transmitted over a data channel in repeated time frames each containing a plurality of time slots. Down link set up information is transmitted over a control channel to indicate from which time slot a user terminal should extract data. Each frame on the data channel includes a user packet flag to indicate whether or not each time slot in the frame contains data. Each user terminal is responsive to the set up information and to the user packet flags to extract data from its assigned time slot in those frames which the slot is indicated to contain data.

公开(公告)号：ID22173A

公开(公告)日：1999-09-09

申请号：ID990150

申请日：1999-02-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： ALLPRESS STEPHEN ALAN ,  CAO QIANG ,  FREIBERG LORENZ FRED ,  LIN JIE ,  WOOD STEVEN ANDREW

IPC: H04B7/26 ,  H04J3/16 ,  H04J3/00 ,  H04W36/00 ,  H04W48/12 ,  H04W72/14

Abstract: A time division multiple access communication system is disclosed, in which down link data are transmitted over a data channel in repeated time frames each containing a plurality of time slots. Down link set up information is transmitted over a control channel to indicate from which time slot a user terminal should extract data. Each frame on the data channel includes a user packet flag to indicate whether or not each time slot in the frame contains data. Each user terminal is responsive to the set up information and to the user packet flags to extract data from its assigned time slot in those frames which the slot is indicated to contain data.

公开(公告)号：DE60028015D1

公开(公告)日：2006-06-22

申请号：DE60028015

申请日：2000-06-06

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MHIRSI KARIM ,  MUIRHEAD DAVID STUART ,  WOOD STEVEN ANDREW

IPC: H04B1/707 ,  H04B1/7115 ,  H04B7/02 ,  H04B7/08 ,  H04B7/26

Abstract: A third generation general partnership program radio communication system or a universal mobile telephone system employs a wide band code division multiple access system. The codes in various incoming signals from different sources are identified by cross correlation using a code matched filter. A multiplexer, samples the signals from each of the P sources at P times the chip rate of the codes in the incoming signals. The mutliplexer time multiplexes the received signals and feeds them to single delay line consisting of N stages each having P elements. Each stage will thus store one sample from each of the P sources. A selected element in each stage has an output which feeds a corresponding input of a code matched filter dot-product adder chain to enable a cross-correlation to be established for each incoming signal in turn.