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Mobile phones offer the possibility to monitor and track health parameters. Our aim was to test the feasibility and accuracy of measuring beat-to-beat heart rate using smartphone accelerometers by recording the vibrations generated by the heart during its function and transmitted to the chest wall, i.e. the so-called seismocardiographic signal (SCG). Methods: 9 healthy male volunteers were studied...
Pseudo-Noise (PN) code synchronization is of crucial for receiver in direct sequence spread spectrum (DSSS) communication. What's more, acquisition and tracking are two important parts of the synchronization process. To meet the need of a lower power consumption and higher performance, there is a trend to design the digital match filter by using the field programmable gate array (FPGA) or the application...
In order to extract the horizontal synchronization information of stochastic video signal and reconstruct video image stably and automatically, the computer video signal captured from the video cable will be analyzed and the method of correlation of stochastic video signal is put forward in this paper. Without synchronization information and resolution information of the monitors, the video images...
The M-sequence has property of good self-correlative, it has pseudo random property and it is easy to be generated and copied. It mainly be applied to spread spectrum and encryption. Traditional information synchronize way based m-sequence realize information synchronize of transmitter and receiver by periodicity of spread spectrum code. When transmitter sending information in every rate, there will...
Attention is the primary cognitive process to induce a response to a stimulus. Maintaining the attentive state continuously for a prolonged period of time is known as sustained attention which is vital for performing any task. The present study aims at evaluating the activation of different brain regions while performing an attention requiring task. A standard attention task called the Visual Continuous...
Aiming at pseudo random sequence, a precise synchronization method tolerating large capture error is proposed in this paper. It firstly formulates the correlation function of the pseudo random sequence in the range of one chip period around the capture position as two straight lines and parameters of which are acquired by employing least squares (LS) algorithm. Then, intersection point of the two...
High-voltage direct current system based on voltage source converters (VSC-HVDC) is widely recognized as a feasible solution to cope with increasing electricity demand and integrate renewable energy sources. One of the most important issues still to be addressed is the protection of the system under DC line fault, especially for the situations using overhead lines due to higher fault frequency. This...
We consider low latency uplink communication where users transmit their signal using generalized frequency division multiplexing (GFDM) with K subcarriers and M sub-symbols. The proposed approach for synchronization exploits both training subcarriers and training subsymbols embedded in a GFDM symbol. A frequency domain training sequence (FD-TS) of length M is loaded on each training subcarrier, and...
The timing synchronization of OFDM/DMT systems is often based on auto-correlation algorithms. However, these algorithms do not provide a sharp correlation peak. In this work, we present a novel timing synchronization and channel estimation concept for optical block transmission systems with intensity modulation and direct detection. This concept is based on Golay complementary sequences. As these...
Coordinated animal behavior is abundant in nature, such as the uniform moving phenomenon among bird flocks, the collective evasion maneuvers of fish schools. To explore the appealing inter-individual interaction mechanism governing the abundant biological grouping behaviors, more and more efforts have been devoted to collective motion investigation in recent years. Previous research claims the existence...
In this paper, we propose a PLC synchronization method based on the correlation of PLC Preamble subcarrier in DOCSIS 3.1 Downstream system. The proposed method aims to find out the starting point of PLC Preamble OFDM symbol and to present the reference point for the allocation of pilot pattern used for channel estimation. We showed the performance of the proposed method through the maximum value detection...
The paper deals with the task of formation a joint criteria for the functional state of the person evaluation based on heart rate variability parameters and synchronization degree between the cardiovascular and respiratory systems parameter. It is shown that proposed in previous studies method of forming a criterion of synchronization based on the Fechner's correlation coefficient has a significant...
Two estimation algorithms for the spreading sequence in DSSS signals are proposed. Some of previously proposed algorithms have some drawbacks such as large computational complexity, low estimation accuracy and poor accuracy by increasing the length of spreading sequence period. In this paper by using an initial estimate of chips, we can improve recursively the final decision with low computational...
In this paper, we propose a timing synchronization method for orthogonal frequency division multiplexing (OFDM) systems by exploiting the averaged differential correlations of preamble symbol. For the designed simple preamble whose second half-symbol is the complex conjugate of the first one in the time-domain, the proposed timing synchronization method has an impulse-shaped timing metric. Simulation...
Over the last twenty years, the research community has devised sophisticated methods for retrieving secret information from side-channel emanations, and for resisting such attacks. This paper introduces a new CPU architecture called the Conjoined Microprocessor (CμP). The CμP can randomly interleave the execution of two programs at very low extra hardware cost. We developed for the CμP a preprocessor...
Non-blocking algorithms are a class of algorithms that provide guarantees of progress within a system. These progress guarantees come from the fine-grained synchronization techniques incorporated into their design. There are a number of various non-blocking designs and implementations of concurrent algorithms. However, trade-offs between performance and non-blocking algorithm design decisions are...
In this paper, analysis of correlation based functional connectivity network of electroencephalogram (EEG) signals has been done. Functional connectivity network explores the important facts about activation and synchronization among different areas of brain. Multi-channel EEG signals generated through audio-visual stimulation is used in this study. Correlated electrode pairs show the simultaneous...
Orthogonal Frequency Division Multiplexing (OFDM) is a advance bandwidth efficient digital modulation technique highly adopted for the broadband wireless services because it gives high performance in the multipath fading environments. It is very robust against narrowband interference, but it is not totally free from drawbacks. There are timing and frequency synchronization error for which this technique...
The main features for future Machine Type Communication (MTC) cellular networks enable low-power, low-cost, narrow band, and extended coverage system. To support these features, new challenges for the system design have emerged. For instance, the device shall be able to setup a call at a signal to noise ratio (SNR) of −15dB in the extended coverage mode with only one receive antenna and almost no...
Machine Type Communication (MTC) device for cellular communication is being defined by 3GPP based on LTE in Rel-12 and Rel-13. Low cost has been the major objective of the definition for Rel-12 based specification. In Rel-13, coverage enhancement of MTC devices has been the major focus along with reduced power consumption, complexity and narrow bandwidth operation. Coverage enhancement (CE) of ∼15dB...
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