Rake receiver and finger management method for spread spectrum c

Details Rake receiver and finger management method for spread spectrum c Rake receiver and finger management method for spread spectrum c

1997-09-16

2000-06-20

Vo, Don N.

Pulse or digital communications

Repeaters

Testing

375200, H04B 1500, H04K 100, H04L 2730

Patent

active

060786116

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.

REFERENCES:
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5490165 (1996-02-01), Blakeney, II et al.
patent: 5577022 (1996-11-01), Padovani et al.
patent: 5590160 (1996-12-01), Ostman
patent: 5621752 (1997-04-01), Antonio et al.
patent: 5764687 (1998-06-01), Easton
patent: 5764688 (1998-06-01), Hulbert

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