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 Abstract— We characterize the total degrees of freedom (DoF) of the full-rank MIMO X channel with arbitrary number of antennas at each node. We elucidate that the existing outer bound is tight for any antenna configuration and provide transmit and receive filter designs that attain this outer bound. The proposed achievable scheme exploits channel(More)
This paper deals with the design of nonregenerative relaying transceivers in cooperative systems where channel state information (CSI) is available at the relay station. The conventional nonregenerative approach is the amplify and forward (A&F) approach, where the signal received at the relay is simply amplified and retransmitted. In this paper, we(More)
This article is the result of an initiative between the European Federation of Pharmaceutical Industries Associations (EFPIA) and the European Centre for the Validation of Alternative Methods (ECVAM). Its objectives are to provide the researcher in the safety evaluation laboratory with an up-to-date, easy-to-use set of data sheets to aid in the study design(More)
BACKGROUND Data on the effectiveness of sleeve gastrectomy in improving or resolving type 2 diabetes mellitus (T2DM) and the metabolic syndrome (MS) are scarce. METHODS A twelve-month prospective study on the changes in glucose homeostasis and the MS in 91 severely obese T2DM subjects undergoing laparoscopic SG (SG; n = 39) or laparoscopic Roux-en-Y(More)
CONTEXT The mechanisms underlying weight loss after Roux-en-Y gastric bypass (RYGBP) are not well understood. OBJECTIVE The objective of the study was to assess the changes in active glucagon-like peptide 1 (GLP-1) and total peptide YY (PYY) after RYGBP and examine their relationship with changes in hunger and satiety. DESIGN This was a prospective(More)
OBJECTIVE To identify the rates and the predictors of long-term remission and the recurrence of type 2 diabetes mellitus (T2DM) after Roux-en-Y gastric bypass (RYGBP) or sleeve gastrectomy (SG). BACKGROUND The durability of the improvement of T2DM after bariatric surgery is not well characterized. METHODS One hundred fifty-three subjects with T2DM(More)
BACKGROUND The prevalence of obesity in Spain is on the rise with the consequent increase in bariatric surgery. Studies in non-Mediterranean populations have shown that micronutrient deficits are present before surgery. However, there is no data on this topic in a Spanish population. METHODS We evaluated food intake and the prevalence of nutritional(More)
This paper deals with the problem of estimating the position of a user equipment operating in a wireless communication network. In particular, we present a new positioning method based on the angles of arrival (AOA) measured in several radio links between that user equipment and different base stations. The proposed AOA-based method leads us to a(More)
In this paper we develop a new linear approach to identify the parameters of a moving average (MA) model from the statistics of the output. First, we show that, under some constraints, the impulse response of the system can be expressed as a linear combination of cumulant slices. Then, this result is used to obtain a new well-conditioned linear method to(More)