Pulse or digital communications – Systems using alternating or pulsating current – Angle modulation
Reexamination Certificate
2007-03-13
2007-03-13
Tran, Khanh (Department: 2611)
Pulse or digital communications
Systems using alternating or pulsating current
Angle modulation
C370S210000, C708S404000
Reexamination Certificate
active
10022166
ABSTRACT:
A method and device are described for generating two output signals (I; Q) each substantially identical to a square-wave input signal (A) from a local oscillator (2), wherein the first output signal (I) may have a certain time shift with respect to the input signal (A), and wherein the second output signal (Q) is shifted over T1/4 [mod T1] with respect to the first output signal (I), T1being the period of the input signal (A). To generate the first output signal (I), Fourier components (S1(ω1), S3(ω3), S5(ω5), S7(ω7), S9(ω9), S11(ω11) etc) of the input signal are combined. To generate the second output signal (Q), Fourier components (S1(ω1), S5(ω5), S9(ω9) etc) of the input signal are phase shifted over +90° while Fourier components (S3(ω3), S7(ω7), S11(ω11) etc) of the input signal are phase shifted over −90°, and the thus shifted Fourier components of the input signal are combined.
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NXP B.V.
Tran Khanh
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