公开(公告)号：NO20054274L

公开(公告)日：2005-09-15

申请号：NO20054274

申请日：2005-09-15

Applicant: INTERDIGITAL TECH CORP

Inventor： HAIM JOHN W ,  DIFAZIO ROBERT A ,  BECKER PETER EDWARD ,  SUPPLEE STEPHAN SHANE ,  BUCHERT RYAN SAMUEL ,  NASUTI TONINO ,  TIMMERMAN CHAYIL S

IPC: H04B1/707 ,  H04B7/216

Abstract: Multi-user detection (MUD) performance is optimized to eliminate redundant use of power during processing. An overbuilt A-matrix, i.e., a system response matrix, is provided. The overbuilt A-matrix uses all possible codes, e.g., all codes identified in a candidate code list (CCL) provided by blind code detection (BCD). The overbuilt A-matrix is passed to the MUD which extracts only those rows or columns required for codes that have actually been received, thus eliminating the need to recompute whitening matched filter (WMF) outputs that do not correspond to the actually received code.

公开(公告)号：CA2517221A1

公开(公告)日：2004-09-16

申请号：CA2517221

申请日：2004-03-01

Applicant: INTERDIGITAL TECH CORP

Inventor： NASUTI TONINO ,  BECKER PETER EDWARD ,  HAIM JOHN W ,  DIFAZIO ROBERT A ,  BUCHERT RYAN SAMUEL ,  TIMMERMAN CHAYIL S ,  SUPPLEE STEPHAN SHANE

IPC: H04B1/707 ,  H04B7/216

Abstract: Multi-user detection (MUD) performance is optimized to eliminate redundant use of power during processing. An overbuilt A-matrix, i.e., a system response matrix, is provided. The overbuilt A-matrix uses all possible codes, e.g., all codes identified in a candidate code list (CCL) provided by blind code detection (BCD). The overbuilt A-matrix is passed to the MUD which extracts only those rows or columns required for codes that have actually been received, thus eliminating the need to recompute whitening matched filter (WMF) outputs that do not correspond to the actually received code.

公开(公告)号：CA2485575A1

公开(公告)日：2003-11-20

申请号：CA2485575

申请日：2003-05-01

Applicant: INTERDIGITAL TECH CORP

Inventor： BUCHERT RYAN ,  NASUTI TONINO ,  TIMMERMAN CHAYIL S

IPC: H04J13/00 ,  H04L25/03 ,  H03D1/04

Abstract: Method and apparatus for performing midamble cancellation (14) to remove midamble interference from the convolution tail of data field (I) and the first W-1 chips of the midamble field which results from the delay spread of the multipath channel and for cancelling the first W-1 chip midamble spread in the data field (II), which are performed substantially simultaneously. The received burst, typical a TDD burst, is stored, the midamble interference an d the corresponding parts in the received burst are removed and the resulting burst is applied to a multi-user detector (20) to obtain the symbol sequence s.