Digital demodulation and applications thereof

Details Digital demodulation and applications thereof Digital demodulation and applications thereof

2005-06-14

2005-06-14

Tran, Khai (Department: 2637)

Pulse or digital communications

Receivers

Angle modulation

C375S376000, C375S130000

Reexamination Certificate

active

06907089

ABSTRACT:
A digital demodulator that may be utilized in integrated radio receivers and/or integrated radios includes a mixing section, 1stand 2nddigital comb filters, phase locked loop module, and a data recovery module. The mixing section is operably coupled to produce a digital I signal and a digital Q signal from a digital intermediate frequency signal. The 1stcomb filter filters the digital I signal while the 2ndcomb filter filters the digital Q signal. The phase locked loop module produces a digital signal from the filtered I and filtered Q signals. The data recovery module interprets the digital signal to recapture a data stream.

REFERENCES:
patent: 4754340 (1988-06-01), Nakagawa et al.
patent: 6115432 (2000-09-01), Mishima et al.
patent: 6229560 (2001-05-01), Jun
patent: 6335952 (2002-01-01), Lee et al.
patent: 6694131 (2004-02-01), Lakkis
patent: 2002/0160734 (2002-10-01), Li et al.

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