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BACKGROUND Intravascular stenting is the procedure of choice in the treatment of vascular stenoses. However, in infants and small children large sheaths are needed, and adult-size stents cannot be implanted. The Valeo Biliary Lifestent (Edwards Lifesciences Irvine, CA) is low profile and can be dilated up to 18-20 mm. We aimed to report on early and(More)
Wideband satellite communication systems may suffer from the slow carrier phase fluctuations due to imperfections in the transmitter and receiver oscillators. The issue is particularly relevant (as the relevant performance degradation is non-negligible) when low cost RF oscillators (LNCs) are adopted. One of the most efficient approaches is compensating for(More)
OBJECTIVES To evaluate early results, learning-curve changes, and mid-term outcome of arterial duct (AD) stenting in congenital heart disease with duct-dependent pulmonary circulation (CHD-DPC) in a high-volume, tertiary referral center. BACKGROUND In spite of wide acceptance as cost-effective alternative to surgical palliation, AD stenting indications,(More)
In up-to-date receiver architectures the gain and phase mismatch between the I and Q signal paths may degrade significantly the overall link performance. An alternative cost effective solution to expensive analog components with small tolerances, which make the I/Q mismatch effect negligible, consists in estimating and compensating it through appropriate(More)
We introduce in this paper a low-complexity joint carrier frequency and phase recovery algorithm for coherent detection/decoding of a turbo-coded 16-QAM signal. The estimator (which can be actually applied to any linear modulation scheme) is based on a pseudo-Maximum Likelihood (ML) approach, and unlike previously published works, makes iterative use of(More)
As is known, satellite positioning is based on the accurate measurement of the delay experienced by a spread-spectrum signal in the propagation from the satellite to the user receiver. The more accurate is such delay estimation, the more precise will be the determination of the user position. In this paper we derive criteria to optimize the format of the(More)