Communications: directive radio wave systems and devices (e.g. – With particular circuit – Complex signal
Patent
1998-02-26
1999-02-16
Pihulic, Daniel T.
Communications: directive radio wave systems and devices (e.g.,
With particular circuit
Complex signal
G01S 740
Patent
active
058725385
ABSTRACT:
I/Q imbalance correction is performed directly in the frequency domain by exploiting the symmetry properties of the discrete Fourier transform (DFT) of a real signal, taking the in-phase component as the real part and the quadrature component as the imaginary part. Amplitudes of ordered real and imaginary spectral components are respectively summed with reverse-ordered real and imaginary spectral components, the sums complex multiplied with correction values derived through calibration and selected in accordance with a maximum magnitude spectral component and the results of the complex multiplication summed with the real and imaginary spectral components. Simplified processing architecture and improved performance for a given level of processing power is thus provided.
REFERENCES:
patent: 3950750 (1976-04-01), Churchill et al.
patent: 4003054 (1977-01-01), Goldstone
patent: 4122488 (1978-10-01), Martin
patent: 4484194 (1984-11-01), Arvidsson
patent: 4489392 (1984-12-01), Lewis
patent: 4616229 (1986-10-01), Taylor, Jr.
patent: 4876489 (1989-10-01), Cawthorne
patent: 5105195 (1992-04-01), Conrad
patent: 5150128 (1992-09-01), Kongelbeck
patent: 5369411 (1994-11-01), Lisle, Jr.
Lockheed Martin Corporation
Pihulic Daniel T.
LandOfFree
Frequency domain correction of I/Q imbalance does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency domain correction of I/Q imbalance, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency domain correction of I/Q imbalance will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2066066