Pulse or digital communications – Receivers – Interference or noise reduction
Reexamination Certificate
2007-05-29
2011-11-01
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Receivers
Interference or noise reduction
C375S229000, C375S230000, C375S231000, C375S232000, C375S233000, C375S234000, C375S235000, C375S236000, C375S279000, C375S280000, C375S281000, C375S282000, C375S283000, C375S286000, C375S316000, C375S322000, C375S327000, C375S329000, C375S330000, C375S331000, C375S332000, C375S333000, C375S340000, C375S348000
Reexamination Certificate
active
08050368
ABSTRACT:
A novel and useful apparatus for and method of nonlinear adaptive phase domain equalization for multilevel phase coded demodulators. The invention improves the immunity of phase-modulated signals (PSK) to intersymbol interference (ISI) such as caused by transmitter or receiver impairments, frequency selective channel response filtering, timing offset or carrier frequency offset. The invention uses phase domain signals (r, θ) rather than the classical Cartesian quadrature components (I, Q) and employs a nonlinear adaptive equalizer on the phase domain signal. This results in significantly improved ISI performance which simplifies the design of a digital receiver.
REFERENCES:
patent: 3969674 (1976-07-01), Tracey
patent: 5115452 (1992-05-01), Cupo
patent: 5222101 (1993-06-01), Ariyavisitakul et al.
patent: 5841816 (1998-11-01), Dent et al.
patent: 6687292 (2004-02-01), Garcia
patent: 7031382 (2006-04-01), Hessel et al.
patent: 7277493 (2007-10-01), Lai
Lerner Gregory
Tsfati Yossi
Brady III Wade James
Fan Chieh M
Neerings Ronald O.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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