Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1997-11-26
1999-10-26
Chin, Stephen
Pulse or digital communications
Receivers
Interference or noise reduction
375350, 455296, 455 63, H03D 104, H03K 501, H04B 110, H04L 100
Patent
active
059741007
ABSTRACT:
A radio signal is digitized and filtered to derive a digitized pilot signal (210) modulated by channel amplitude and phase distortion. A numerator and a denominator are formed for dividing the digitized radio signal (208) by the digitized pilot signal, the numerator and the denominator requiring a first predetermined number of bits per sample. The bits of the numerator and the denominator are shifted (518) by equal amounts until a highest order bit of one of the numerator and the denominator is non-zero. A second predetermined number of highest order bits of the numerator are divided (524) by the second predetermined number of highest order bits of the denominator in a divider utilizing less than the first predetermined number of bits, to generate a channel compensated radio signal (536) having a minimum number of bits that can accommodate a predetermined maximum dynamic range.
REFERENCES:
patent: 5414734 (1995-05-01), Marchetto et al.
patent: 5529071 (1996-06-01), Foster
patent: 5809083 (1998-09-01), Wright
patent: 5812600 (1998-09-01), Hess et al.
Bayram Metin
Carsello Stephen Rocco
Breeden R. Louis
Chin Stephen
Motorola Inc.
Phu Phuong
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