A new noncoherent scheme called Permutation Index Differential Chaos Shift Keying (PI-DCSK) modulation is proposed in this paper. This original design aims to enhance data security, energy and spectral efficiencies, compared its rivals. In the PI-DCSK scheme, each frame divided into two time slots which reference chaotic signal sent first slot a permuted replica of multiplied by modulating bit second slot. particular, stream at transmitter blocks n+1 bits, where n mapped bits are used select...

In this brief, a novel non-coherent modulation system called commutation code index differential chaos shift keying (CCI-DCSK) is presented. the proposed scheme, benefits of (IM) are exploited so that energy and spectral efficiencies improved. We putting forward CCI-DCSK scheme in which reference sequence along with its corresponding data bearing orthogonal version sent within same time slot to enhance efficiency. Specifically, at transmitter p additional bits mapped into repetition...

In this paper, we propose a low-complexity multi-user communication system based on frequency index modulation that suits Internet of Things applications. This aims to reduce the transmitted energy and peak-to-average-power ratio (PAPR) orthogonal frequency-division multiplexing (OFDM) systems perform without sacrificing data rate in comparison with conventional OFDM. design, OFDM-like signals are used make implementation easy by virtue fast Fourier transform (FFT). proposed scheme, an OFDM...

In this paper, a method for the vehicles detection in surroundings of an autonomous vehicle and warnings potential collision with them is presented. The method, which consists two parts, implemented robot operating system (ROS). first part used to detect environment, which, YOLO v2 algorithm, trained on newly created set images, used. algorithm configured four classes objects: car, van, truck, bus. second proposed ROS node distance assessment. particular, nodes assessment are created; one...

In this brief, a generalized closed-form approach for the evaluation of lower bound on BER differential chaos-shift-keying (DCSK) systems over multi-path Nakagami-m fading channels is presented. A derived all configurations channel model which extends to profiles covered by Nakagami model. contrast previous works where very specific models were targeted and only numerical analyses DCSK presented, we provide an that analytically unifies performance analysis more models. similar analytical...

This paper brings forward a Deep Learning (DL)-based Chaos Shift Keying (DLCSK) demodulation scheme to promote the capabilities of existing chaos-based wireless communication systems. In coherent (CSK) schemes, we need synchronization chaotic sequences, which is still practically impossible in disturbing environment. Moreover, conventional Differential (DCSK) has drawback, that for each bit, half bit duration spent sending non-information bearing reference samples. To deal with this Long...

This brief provides the mathematical analysis of Schmitt-trigger propagation-delay influence on asynchronous sigma–delta modulator (ASDM) output-signal frequency spectrum. Beside propagation delay, slew-rate impact has been also presented. Based analysis, a method for compensation proposed. The is implemented by introducing hysteresis-level modulation. first-order ASDM simulation and measurement models have proposed to verification. results confirm output spectrum improvement.

An initial condition‐index chaos shift keying modulation is proposed. This design aims to increase the spectral and energy efficiencies unprecedented levels. The proposed scheme exploits conditions generate different chaotic sequences convey extra bits per transmission. In design, input data stream formed in blocks of bits. this architecture, n are mapped into predetermined that used unique at transmitter. At receiver side, a set N correlated with received signal. index condition for which...

The paper presents a novel transmitter architecture for short-range asynchronous wireless communication, applicable to simultaneous multi-user acquisition of biological signals. analog signal, provided from an biosensor, is transformed time information using Integral Pulse Frequency Modulator (IPFM) as Time-Encoding Machine. IPFM generates time-encoded unipolar pulse train, maintaining the linear dependence output distance on input voltage. system enables continuous signals multiple sensors...

This paper analyzes performances of the Pulse Interval Modulation (PIM) scheme for impulse radio ultra-wideband (IR-UWB) communication systems. Due to PIM anisochronous nature, a tap delay line (TDL) coded division multiple access (CDMA) based on strict optical orthogonal codes (SOOC) is proposed. suitable multiuser high-speed data asynchronous transmission applications because average symbol length shorter than in Position (PPM) schemes and it needs only chip synchronization. The error...

This brief presents a tunable Impulse-Radio Ultra-Wideband (IR-UWB) pulse generator based on feedback oscillator switching. The circuit provides wide range of amplitude and width tuning, thus enabling the required shaping for desired repetition rate and/or wireless transmission range. Feedback controlled switching prevents potential omission UWB generation low energy variations at bias currents temperature range, ensuring system robustness with respect to variations. is within 0.27 Vpp 2.05...

Transmitted-reference (TR) ultra-wideband (UWB) communication systems have gained increasing popularity for the usage in low data rate application, due to its non-coherent receiver structure. In conventional TR system, non-coherency at is achieved by sending reference pulses prior data-bearing pulses. Then, side, are used as template signals correlation with Therefore, orthogonality between and obtained time division multiple access (TDMA) fashion. However, implementation of a wideband delay...

Due to high requirements on network capacity during transmission, video signals have be compressed. Compression process and transmission introduce different compression artifacts packet loss (PL) in signals, respectively. These degrade visual quality of signal thus has continuously measured monitored order assure the target service. Regarding PL artifacts, decoder's post-processing algorithm tries mitigate or completely remove impairments caused by PL. Consequently, depending error...

This paper presents limit cycle frequency jittering of a first order Asynchronous Sigma-Delta Modulator (ASDM) implemented with Schmitt trigger. Particular interest is placed on jitter trigger hysteresis voltage (hysteresis jitter). Hysteresis has been modeled in MATLAB® Simulink and the model simulation compared measurements for ordered ASDM. Both measurement show that ASDM depends jitter.

This paper presents a novel Multi Pulse Position Amplitude Modulation (MPPAM) scheme for time-hopping ultra-wideband (TH-UWB) communication system. MPPAM is combined version of the (MPPM) and (PAM) where information conveyed in position amplitude multiple pulses. The comparison between PAM (PPM) was given aspect symbol error probability over additive white Gaussian noise (AWGN) channel. It shown that with proper selection level numbers, pulses time slots can be achieved better performances...

Due to the diversity in todays communication networks, adaptability is one of key requirements development a quality multimedia streaming client. In this paper, system for verification Hybrid Broadcast Broadband TV (HbbTV) standard, with special emphasis on Moving Picture Experts Group Dynamic Adaptive Streaming over Hypertext Transfer Protocol (MPEG-DASH) functionality, given. System functionality was tested by using developed JavaScript DASH player, which structure described paper. The...

The paper presents the novel receiver architecture for short-range wireless sensor communication, based on Integral Pulse Frequency Modulator (IPFM) and Ultra-Wideband (UWB) pulse generator. UWB IPFM transmits ultra-wideband pairs with information contained in distance between consecutive pairs. Multi-user coding is performed using delay elements, where each user has unique time. At input Low Noise Amplifier (LNA) amplifies pulses detect pulse. Since narrow cannot be processed digital signal...

The multi pulse position amplitude modulation scheme for time-hopping multiple access impulse radio ultrawideband communication systems has been presented in this paper. Multi is a hybrid technique, which combines and modulation. It shown that significantly outperforms with respect to bandwidth efficiency. error probability over IEEE 802.15.3a multipath fading channels multiuser environment derived. system analysis shows the proper selection of parameters can improve performance at cost...