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Robust field map estimation is important to many MRI applications, such as reconstruction with correction of susceptibility artifacts, MR-based temperature mapping, and water-fat separation. To enable in-vivo field map estimation with minimal scan times, multi-echo imaging sequences, which acquire multiple images in a single repetition, are gaining great interest. However, it has been observed that...
Inspired by the success of the low-density parity-check (LDPC) codes in the field of error-control coding, in this paper we propose transforming the downlink multiuser multiple-input multiple-output scheduling problem into an LDPC-like problem using the normal graph. Based on the normal graph framework, soft information, which indicates the probability that each user will be scheduled to transmit...
Magnetic amplifier is a simple and high efficiency post regulator in auxiliary output of the multiple output power supplies. The Schottky diodes must be replaced by synchronous rectifiers (SRs) in low voltage output converters to improve the efficiency. In this paper, a new gate-driver scheme is proposed to maximize the efficiency of the synchronous rectifiers combined with magnetic amplifier post...
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