Asma Selmi

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Mobile radio communication systems employ either Adaptive Modulation and Coding (AMC) combined with an Automatic Repeat reQuest (ARQ) protocol, or Power Control (PC) to handle channel variations, but never a combination of these link adaptation techniques. In this paper we propose a novel scheme which optimally combines PC with AMC, using the ARQ protocol.(More)
In this paper, we develop an energy efficient cross-layer design which optimally combines Adaptive Modulation (AMC) and Coding and Power Control (PC), at the physical layer, with type-I Hybrid Automatic Repeat reQuest (HARQ-I) protocol, at the data link layer. The objective is to maximize the average throughput efficiency under a prescribed average transmit(More)
Adaptive modulation and coding (AMC), power control (PC) and automatic repeat request protocols (ARQ) represent very important link adaptation (LA) techniques for future generations of wireless communication systems. In order to improve the efficiency of these systems, some combination schemes of these LA techniques have been proposed in the literature.(More)
Two representational abilities, expressive and receptive language and symbolic play, were assessed in multiple formats in hearing and deaf 2-year-old children of hearing and deaf mothers. Based on maternal report, hearing children of hearing and deaf mothers produced more words than deaf children of hearing mothers, hearing children of hearing mothers more(More)
In this paper, we present a throughput optimized cross-layer design for multiple-input multiple-output (MIMO) wireless systems. The proposed design efficiently combines power control (PC), adaptive modulation and coding (AMC) and MIMO technology at the physical layer, with an automatic repeat request (ARQ) protocol at the data-link layer. Both basic ARQ and(More)
In this paper, we are interested in the optimal redistribution of the available budget in average transmit power per packet among potential packet transmission attempts for improved Automatic Repeat reQuest (ARQ) protocol. A conventional ARQ protocol was combined in [5], with both Adaptive Modulation and Coding (AMC) and Power Control (PC) to improve(More)
BACKGROUND The physical activity during adolescence seems to correlate with bone mass at the end of the growth period. aim : To determine the effect of handball regularly practiced by teenage girls on the anthropometric parameters and bone mineral density. METHODS Cross-sectional case-control, made in the rheumatology department of the Rabta hospital, has(More)
In this paper, we develop an energy efficient cross-layer design which optimally combines adaptive modulation and coding (AMC) and power control (PC), at the physical layer, with type-I hybrid automatic repeat request protocol (HARQ-I), at the data link layer. The objective is to maximize the average throughput efficiency under a prescribed average transmit(More)
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