Methods and apparatus for I/Q imbalance compensation

Details Methods and apparatus for I/Q imbalance compensation Methods and apparatus for I/Q imbalance compensation

2006-06-13

2006-06-13

Bocure, Tesfaldet (Department: 2631)

Pulse or digital communications

Receivers

C375S329000

Reexamination Certificate

active

07061994

ABSTRACT:
Methods and apparatus for performing amplitude and phase imbalance correction operations on in-phase and quadrature phase signal components corresponding to a received signal are described. The imbalance correction operations relay on the use of relatively simple to implement feedback loops. The phase imbalance feedback loop relies on the tendency of transmitted symbols to be distributed uniformly around the origin of the I/Q plane if proper phase balance is present in the processed signal. Phase correction coefficients are generated over time as a function of the negated product of the processed in-phase and quadrature phase signal components. Amplitude correction coefficients are generated over time as a function of the difference in the squared values of the I and Q processed signal components.

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