Receiver having automatic burst mode I/Q gain and phase balance

Pulse or digital communications – Receivers

Reexamination Certificate

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Details

C375S326000, C375S322000, C375S147000, C455S313000, C455S296000

Reexamination Certificate

active

06950480

ABSTRACT:
A method and apparatus for balancing I/Q gain and I/Q phase in a signal receiver. The receiver includes an IQ coefficient calculator, an IQ balancer, and a latency time delay device. The latency time delay device delays I and Q signals by a latency time period. During the latency time the IQ coefficient calculator uses the I and Q signals during a section of the packets corresponding to the latency time period for computing correction coefficients. The IQ balancer receives the I and Q signals after the latency time period and applies the correction coefficients to the entire packet of I and Q signals.

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Ediz Cetin, Izzet Kale & Richard C. S. Morlin, “Adaptive Compensation of Analog Front-End I/Q Mismatches in Digital Receivers”, pp. IV-370 to IV373, IEEE, 2001.
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Knog-pang Pun, Jose E. Franca & C. Azeredo-Leme, “Wideband Digital Correction and I and Q Mismatch in Quadrature Radio Receivers”, ISCAS 2000—IEEE International Symposium on Circuits and Systems, May 28-31, 2000, pp. V661-V664, Geneva, Switzerland.
Ediz Cetin, Izzet Kale & Richard C. S. Morlin, “On the Structure, Convergence and Performance of an Adaptive I/Q Mismatch Corrector”, pp. 2288-2292, IEEE, 2002.

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