公开(公告)号：FR2768576B1

公开(公告)日：2004-10-29

申请号：FR9810128

申请日：1998-08-06

Applicant: MOTOROLA INC

Inventor： LAROSA CHRISTOPHER P ,  CARNEY MICHAEL J ,  BECKER CHRISTOHER J ,  EBERHARDT MICHAEL A ,  FRANK COLIN D ,  RASKY PHILLIP D

IPC: H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/69 ,  H04B7/216

Abstract: A RAKE receiver (112) includes a plurality of fingers (122, 124, 126, 128). Each finger includes a demodulator (402) for demodulating a ray of a multipath signal and a time tracking circuit (404) for controlling the time position of the finger in accordance with time position of the ray. A low delay-spread condition is detected and the positions of two adjacent fingers are controlled to prevent convergence of two or more fingers about a common time position. By maintaining finger timing separation, path diversity is exploited by the RAKE receiver even during the low delay-spread condition to improve receiver performance.

公开(公告)号：FR2768576A1

公开(公告)日：1999-03-19

申请号：FR9810128

申请日：1998-08-06

Applicant: MOTOROLA INC

Inventor： LAROSA CHRISTOPHER P ,  CARNEY MICHAEL J ,  BECKER CHRISTOHER J ,  EBERHARDT MICHAEL A ,  FRANK COLIN D ,  RASKY PHILLIP D

IPC: H04B1/7113 ,  H04B1/7115 ,  H04B1/7117 ,  H04B1/69 ,  H04B7/216

Abstract: A RAKE receiver (112) includes a plurality of fingers (122, 124, 126, 128). Each finger includes a demodulator (402) for demodulating a ray of a multipath signal and a time tracking circuit (404) for controlling the time position of the finger in accordance with time position of the ray. A low delay-spread condition is detected and the positions of two adjacent fingers are controlled to prevent convergence of two or more fingers about a common time position. By maintaining finger timing separation, path diversity is exploited by the RAKE receiver even during the low delay-spread condition to improve receiver performance.