Method and apparatus for providing the in-phase and...

Details Method and apparatus for providing the in-phase and... Method and apparatus for providing the in-phase and...

H - Electricity

04

B

325/110

H04B 1/26 (2006.01) H03D 1/22 (2006.01)

Patent

CA 1156313

TITLE METHOD AND APPARATUS FOR PROVIDING THE IN-PHASE AND QUADRATURE COMPONENTS OF A BANDPASS SIGNAL INVENTORS James P. Reilly Simon Haykin ABSTRACT OF THE DISCLOSURE The method and apparatus provides the in-phase I and quadrature Q components of a bandpass signal x(t) of center frequency fc and bandwidth 2w. The signal x(t) is heterodyned to have an intermediate center frequency fo where w ? fo ? fc. This signal is divided into two signals and each is sampled during successive periods Ts where Ts = m/fo and m is an intege. However, the instant of sampling of one signal is shifted with respect to the other by b/4fo where b is an odd integer. In the various implementations, the shift may be either positive, negative, or both, to provide the quadrature component Q, whereas the sampling of the other signal provides the in-phase component I.

369487

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