公开(公告)号：BR9900021A

公开(公告)日：2000-01-04

申请号：BR9900021

申请日：1999-01-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LUSCHI CARLO ,  MUJTABA SYED AON ,  SANDELL MAGNUS ,  STRAUCH PAUL EDWARD ,  BRINK STEPHAN TEN ,  YAN RAN-HONG

IPC: H03M7/30 ,  H03M13/29 ,  H04B14/04 ,  H04L1/22 ,  H03M13/00

Abstract: Apparatus and method for iteratively decoding a signal are provided. The apparatus includes a central pool of resources for iteratively decoding signals. The central pool may run a plurality of iterative decoding processes, each process being allocated to a signal processing unit upon request and depending upon resource availability.

公开(公告)号：CA2269580A1

公开(公告)日：1999-10-30

申请号：CA2269580

申请日：1999-04-20

Applicant: LUCENT TECHNOLOGIES INC

Inventor： STRAUCH PAUL EDWARD ,  YAN RAN-HONG ,  MUJTABA SYED AON ,  SANDELL MAGNUS ,  TEN BRINK STEPHAN ,  LUSCHI CARLO

IPC: H04L27/01 ,  H04L25/02 ,  H04L1/20 ,  H04Q7/34

Abstract: A method of estimating channel impulse response in a signal transmitted over a channel in a communication system is described. The channel estimator obtains a priori knowledge about the transmitted signal and then use the transmitted signal and the a priori knowledge to choose an estimate of channel impulse response which minimises the expected distance between the transmitted signal and a reconstructed signal. The expected distance that is minimised is a cost function; represented by E{¦¦r-Bh¦¦2r).. By using soft decision feedback, the invention minimises erroneous decision feedback which can cause error propagation. The decision are usually in the form of log likelihood ratios (LLR).

公开(公告)号：AU1321399A

公开(公告)日：1999-09-30

申请号：AU1321399

申请日：1999-01-25

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LUSCHI CARLO ,  YAN RAN-HONG ,  BRINK STEPHAN TEN ,  STRAUCH PAUL EDWARD ,  SANDELL MAGNUS ,  MUJTABA SYED AON

IPC: H03M7/30 ,  H03M13/29 ,  H04B14/04 ,  H03M13/00

Abstract: Apparatus and method for iteratively decoding a signal are provided. The apparatus includes a central pool of resources for iteratively decoding signals. The central pool may run a plurality of iterative decoding processes, each process being allocated to a signal processing unit upon request and depending upon resource availability.

公开(公告)号：CA2254644A1

公开(公告)日：1999-07-27

申请号：CA2254644

申请日：1998-11-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MUJTABA SYED AON ,  SANDELL MAGNUS ,  LUSCHI CARLO ,  TEN BRINK STEPHAN ,  YAN RAN-HONG ,  STRAUCH PAUL EDWARD

IPC: H03M7/30 ,  H03M13/29 ,  H04B14/04 ,  H03M7/00 ,  H04Q7/20 ,  H03M1/66

Abstract: Apparatus and method for iteratively decoding a signal arc provided. The apparatus includes a central pool of resources for iteratively decoding sign als. The central pool may run a plurality of iterative decoding processes, each proce ss being allocated to a signal processing unit upon request and depending upon reso urce availability.

公开(公告)号：DE60029740D1

公开(公告)日：2006-09-14

申请号：DE60029740

申请日：2000-02-16

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUZMINSKIY ALEXANDR ,  LUSCHI CARLO ,  SAMARAS KONSTANTINOS

IPC: H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04L1/06 ,  H04L12/56 ,  H04W28/04 ,  H04W74/08

Abstract: In a PRACH channel, colliding signals are resolved by use of a number of training-like symbols in the colliding data payloads. The signals are estimated by spatio temporal filters running a training-based or semi-blind algorithm, and a selection criterion is applied to the estimated signals, such as distance from the finite alphabet or the mean square error.

公开(公告)号：DE69932118D1

公开(公告)日：2006-08-10

申请号：DE69932118

申请日：1999-04-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LUSCHI CARLO ,  SANDELL MAGNUS ,  MUJTABA SYED AON ,  STRAUCH PAUL EDWARD ,  TEN BRINK STEPHAN DIPL ING ,  YAN RAN-HONG

IPC: H04L25/02 ,  H04L27/01

Abstract: A method of estimating channel impulse response in a signal transmitted over a channel in a communication system is described. The channel estimator obtains a priori knowledge about the transmitted signal, and then uses the transmitted signal and the a priori knowledge to choose an estimate of channel impulse response which minimizes the expected distance between the transmitted signal and a reconstructed signal. The expected distance that is minimized is a cost function, represented by E{∥r-Bh∥2r}. By using soft decision feedback, the invention minimizes erroneous decision feedback which can cause error propagation. The decisions are usually in the form of log likelihood ratios (LLR).

公开(公告)号：DE69923541T2

公开(公告)日：2006-02-16

申请号：DE69923541

申请日：1999-05-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： FLEWITT ADRIAN ROBERT ,  LUSCHI CARLO ,  RUMI EMAL DAHAM ,  SANDELL MAGNUS ,  STRAUCH PAUL EDWARD ,  YAN RAN

IPC: H04L25/02 ,  H04L27/00 ,  H04L27/233

公开(公告)号：GB2375272B

公开(公告)日：2003-11-19

申请号：GB0110537

申请日：2001-04-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： LUSCHI CARLO ,  STRAUCH PAUL EDWARD ,  KUZMINSKIY ALEXANDER

IPC: H04L27/00 ,  H04L27/233 ,  H04L7/02

Abstract: A frequency estimator is provided for use in a receiver of packetized data. The frequency estimator determines the signal frequency error ( ƒo) with which a data packet has been received. It does this by relating data (gn) representative of some symbols to decisions (Sn) on those symbols. These symbols include not only training symbols (Nt) but also some information symbols (Nadd).

公开(公告)号：CA2254644C

公开(公告)日：2002-08-06

申请号：CA2254644

申请日：1998-11-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MUJTABA SYED AON ,  LUSCHI CARLO ,  STRAUCH PAUL EDWARD ,  TEN BRINK STEPHAN ,  YAN RAN-HONG ,  SANDELL MAGNUS

IPC: H03M7/30 ,  H03M13/29 ,  H04B14/04 ,  H03M7/00 ,  H04Q7/20 ,  H03M1/66

Abstract: Apparatus and method for iteratively decoding a signal arc provided. The apparatus includes a central pool of resources for iteratively decoding signals. The central pool may run a plurality of iterative decoding processes, each p rocess being allocated to a signal processing unit upon request and depending upon resource availability.

公开(公告)号：BR0100346A

公开(公告)日：2001-10-02

申请号：BR0100346

申请日：2001-02-07

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUZMINSKIY ALEXANDR ,  SAMARAS KONSTANTINOS ,  LUSCHI CARLO

IPC: H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04L1/06 ,  H04L12/56 ,  H04W28/04 ,  H04W74/08 ,  H04Q7/20

Abstract: In a PRACH channel, colliding signals are resolved by use of a number of training-like symbols in the colliding data payloads. The signals are estimated by spatio temporal filters running a training-based or semi-blind algorithm, and a selection criterion is applied to the estimated signals, such as distance from the finite alphabet or the mean square error.