公开(公告)号：BR9903622A

公开(公告)日：2000-09-05

申请号：BR9903622

申请日：1999-08-12

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GITLIN RICHARD DENNIS ,  MAILAENDER LAWRENCE EUGENE ,  VALENZUELA REINALDO A ,  HUANG HOWARD C

IPC: H03H17/02 ,  H04B1/10 ,  H04B1/7107 ,  H04B7/005 ,  H04J3/16 ,  H04L29/08 ,  H04B7/08 ,  H04B7/216

Abstract: A method and apparatus for increasing system capacity in a mixed-rate wireless communication are disclosed. Improvements are obtained using multiuser detection or antenna array processing techniques or both to explicitly cancel or attenuate only the high power users. Multiuser detection may be combined with antenna array processing to recover capacity appropriated by the high-power users. By mitigating the interference effects of only the high-powered users, the computational burden is manageable. An antenna array algorithm or a multiuser detection algorithm or both, are applied only to n high rate users (n

公开(公告)号：AU4245199A

公开(公告)日：2000-02-24

申请号：AU4245199

申请日：1999-08-03

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HUANG HOWARD C ,  PAPADIAS CONSTANTINOS BASIL ,  MAILAENDER LAWRENCE EUGENE

IPC: H04B1/10 ,  H04B1/7093 ,  H04B1/7103 ,  H04B1/7105 ,  H04B1/7115 ,  H04J13/04 ,  H04B7/216

Abstract: Linear space-time multiuser detectors are described that combine array processing, rake detection, and multiuser detection and that satisfy a minimum mean-squared error criteria. Both embodiments can be implemented adaptively so as to account for unknown sources of interference. The adaptive implementation of the first embodiment of a linear space-time detector requires explicit estimates of the channel coefficients. On the other hand, the adaptive implementation of the second embodiment does not require these estimates since they can be adaptively obtained. Both of these detectors provide significant performance advantages over single-user space-time detectors and over multiuser detectors which do not account for CDMA interference from unknown sources.

公开(公告)号：BR9902994A

公开(公告)日：2000-08-01

申请号：BR9902994

申请日：1999-07-27

Applicant: LUCENT TECHNOLOGIES INC

Inventor： HUANG HOWARD C ,  MAILAENDER LAWRENCE EUGENE ,  PAPADIAS CONSTANTINOS BASIL

IPC: H04B1/10 ,  H04B1/7093 ,  H04B1/7103 ,  H04B1/7105 ,  H04B1/7115 ,  H04B7/216

Abstract: Linear space-time multiuser detectors are described that combine array processing, rake detection, and multiuser detection and that satisfy a minimum mean-squared error criteria. Both embodiments can be implemented adaptively so as to account for unknown sources of interference. The adaptive implementation of the first embodiment of a linear space-time detector requires explicit estimates of the channel coefficients. On the other hand, the adaptive implementation of the second embodiment does not require these estimates since they can be adaptively obtained. Both of these detectors provide significant performance advantages over single-user space-time detectors and over multiuser detectors which do not account for CDMA interference from unknown sources.