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Thus far, attention has been paid to phenomena wherein the cardiovascular system and respiratory movement system have worked in coordination with one another, which has been studied. On the other hands, the earlier studies have hinted at the importance of considering mental and physical health from a holistic perspective, while taking into consideration the principles that prescribe the chaotic behavior...
In this paper a trained timing synchronization method using a matched filter and Carrier Frequency Offset synchronization method based on a modified correlation scheme is implemented in hardware for Orthogonal Frequency Division Multiplexing. MATLAB System Generator is used to target a Virtex-6 FPGA on the ML605 Xilinx evaluation board, with an optimized number of board resources utilized. A complex...
Nowadays concurrent programming is in large demand. The inherent support for concurrency is therefore increasingly important in programming languages. As for C++, an abundance of standard concurrency constructs have been supported since C++11. However, to date there is little work investigating how these constructs are actually used in developing real software. In this paper, we perform an empirical...
In military confrontation, traditional underwater acoustic communication techniques with fixed frequency and modulation fashion are likely to result in the exposure of the submarine's position. It is helpful for enhance the submarine's concealment to use the sea background noise as carrier to perform communication. In this paper, a novel covert underwater communication method based on sea lion sounds...
Military communications face increasingly congested environments requiring spectrally efficient approaches capable of contending with many users and interference. We evaluate the over-the-air performance of recently designed minimum total squared correlation (MinTSC) signature sets compared to maximal length pseudorandom binary spreading sequences (m/PN) under a variety of interference conditions...
In a prior work, we derived the LLRTD metric for frame synchronization over a binary symmetric channel (BSC), where data frames are of unknown and unequal lengths and with synchronization words aperiodically inserted, data symbols have a known, unequal distribution. The performance of the metric was evaluated using simulations. Here we provide an analytical performance evaluation for the LLRTD metric...
In this paper, a pilot-aided frequency synchronization scheme for orthogonal frequency division multiplexing (OFDM) systems is proposed. A maximum likelihood (ML) estimator based on Double Dwell Synchronization (DDS) is employed for offset estimation and correction. The proposed DDS scheme provides an accurate estimate over a wide estimation range with reduced computational complexity for both AWGN...
This paper presents the implementation of Orthogonal Frequency-Division Multiplexing receiver blocks as accelerators using a template-based Coarse-Grained Reconfigurable Array (CGRA) device. The CGRA operates with a Reduced Instruction-Set Computing (RISC) processor so that the overall system yields the benefits of general- and special-purpose processing. The accelerators are designed by crafting...
In recent years, communications systems through mains, known as PLC (Powerline Communication), have received a lot of interest as part of intelligent networks or smart grids, as well as for multimedia applications at homes. In broadband PLC, systems using multicarrier modulations allow the mitigation of selective frequency fading in the channel. Nevertheless, these modulations require accurate time...
Monitoring pregnancy using noninvasive recordings of uterine contractions is still an unsolved issue. Here, we propose a new way to tackle this problem using the electrohysterographic (EHG) signals recorded during pregnancy and labor. The new approach is based on the analysis of the propagation of the uterine electrical activity. The proposed pipeline includes i) the computation of the statistical...
In distributed networks such as wireless ad hoc networks, local and lossy logs are often available on individual nodes. We propose REFILL, which analyzes lossy and unsynchronized logs collected from individual nodes and reconstructs the network behaviors. We design an inference engine based on protocol semantics to abstract states on each node. Further we leverage inherent and implicit event correlations...
In this paper, the problems involving frame synchronization and convolutional code identification for CCSDS link protocol are tackled. By combining the correlation of convolutional codeword and the theory of association rule mining, a new joint frame synchronization and code identification method is presented. It uses sequence position association to identify periodic frequent sequences and then match...
Device-to-device (D2D) proximity services has been one of the key topics in Release 12 of 3GPP LTE and most of its technical specifications were recently concluded. Among them, synchronization procedure is a crucial step required for devices to proceed with any further operation such as discovery and communication. Once the devices are synchronized, other operations can be initiated. Technical details...
In this study, we implemented orthogonal frequency division multiplexing (OFDM) based communication with universal serial peripheral device known USRP. We aim to study synchronization related problems of OFDM based system in real environment. The timing, phase and channel estimation are done. Their effects to the system performance are discussed. The results show that by using right tools, synchronization...
We examined the use of mutual information (MI) and the instantaneous phase of the analytic signal to address synchronization of uterine pressure (UP) and fetal heart rate (FHR). MI was used to assess the UP-FHR coupling because it is suitable for non-linear systems with non-Gaussian noise. Estimating degree of synchronicity and UP-FHR delay length is useful since they are physiological correlates...
We discuss the use of a metric based on the amplitude variation of a channel in the signal bandwidth to predict whether or not a digital wireless communication test system receiver will be able to demodulate a test signal. This metric is compared to another method consisting of the correlation calculated across the channel. A logistic regression analysis is used to provide a normalized assessment...
As an overlay cognitive radio, transform domain communication system (TDCS) has been proposed to support reliable communications with low probability of interception. However, most of research on TDCS assume perfect synchronization to simplify algorithm design. In this paper, we present a low complexity symbol timing offset (STO) and carrier frequency offset (CFO) estimation method for practical TDCS...
Test case prioritization for regression testing is an approach that schedules test cases to improve the efficiency of service-oriented workflow application testing. Most of existing prioritization approaches range test cases according to various metrics (e.g., Statement coverage, path coverage) in different application context. Service-oriented workflow applications orchestrate web services to provide...
A base station (BS) in an LTE cellular network, transmits primary synchronization signal (PSS) in every frame to facilitate synchronization. PSS are derived from Zadoff-Chu (ZC) sequences. User equipment (UE) determines physical layer identity and frame timing of BS transmissions, by PSS acquisition. The techniques to detect PSS are typically based on cross-correlating the received signal with local...
While hand trajectory has been successfully modeled for single arm reaching movement, few works have considered the bimanual reaching movement and no study has modeled the dyadic reaching movement. In a bimanual task, both hands belong to the same person, while in a dyadic task each hand belongs to a different person. In this paper, we study both bimanual and dyadic reaching movements and show that...
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