Direct sampling type wireless receiver and method using the...

Details Direct sampling type wireless receiver and method using the... Direct sampling type wireless receiver and method using the...

2011-05-31

2011-05-31

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Receivers

C375S326000, C375S329000, C455S324000, C329S306000

Reexamination Certificate

active

07953184

ABSTRACT:
There are provided a direct sampling type wireless receiver and a method using the same that reduce nonlinearity and DC offset by using a multi-port network and a carrier frequency direct conversion method with a low sampling rate of a direct sampling method in a wireless communication receiver. A direct sampling type wireless receiver according to an aspect of the invention includes: a reference signal generation unit supplying a first reference signal having a predetermined frequency and a second reference signal having a higher frequency than the first reference signal; a down sampling unit sampling an input RF signal according to the first reference signal; an analog-to-digital converting unit converting the signal sampled by the down sampling unit into a digital signal according to the second reference signal; and a multiple-input multiple-output port unit dividing the digital signal from the analog-to-digital converting unit into a plurality of digital signals, generating a plurality of carrier signals having different phases from each other by shifting phases of the digital signals, and outputting a plurality of phase signals having different phases from each other by adding the plurality of carrier signals and the plurality of digital signals to each other.

REFERENCES:
patent: 4841544 (1989-06-01), Nuytkens
patent: 5692014 (1997-11-01), Basham et al.
patent: 5937013 (1999-08-01), Lam et al.
patent: 7302024 (2007-11-01), Arambepola
patent: 2007/0030931 (2007-02-01), Arambepola
patent: 2009/0009155 (2009-01-01), Hosokawa et al.

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