The existing research on deep learning for radar signal intra–pulse modulation classification is mainly based supervised leaning techniques, which performance relies a large number of labeled samples. To overcome this limitation, self–supervised framework, contrastive (CL), combined with the convolutional neural network (CNN) and focal loss function proposed, called CL––CNN. A two–stage trainin...

Abstract— In this research, a single phase Z-source cascading Multilevel Inverter, Nine-level inverter topologies with a trinary DC sources are offered. The recommended topologies are expanded by cascading a full bridge inverter with dissimilar DC sources. This paper recommends advanced pulse with modulation technique as a switching scheme. In this PWM technology, trapezoidal modulation techniq...

The performance of dual heard pulse interval modulation (DH-PIM) employing least mean square error equaliser (LMSE) in diffuse infrared indoor environment is presented. The work is based on the ceiling bounce channel model and the Monte Carlos simulation. A 3-tap LMSE equaliser is used and results are compared with unequalised DH-PIM and with DHPIM employing linear zero forcing equaliser (L-ZFE...

Trends in modern communication systems place high demands on low power consumption, high speed transmission and anti-interference characteristics. Therefore impulse radio ultra–wideband (IR-UWB) [1] radio systems have recently gained increased popularity. Since IR-UWB symbols are transmitted with short pulses (< 2 ns), in IR-UWB systems, energy has been spread over the frequency bands of up to ...

This paper presents analysis, simulation and implementation of Space vector pulse width modulation (SVPWM) inverter. Principles of the SVPWM is introduced and analyzed. Modeling of the switching intervals and control signal generators are introduced. Implementation and Experimental results of SVPWM inverter are presented to realize the validity of the SVPWM technique. Key-Words: Inverter – Puls...

Time hopping ultra wideband (TH-UWB) communication promises to be a viable technique to build a relatively simple, low-cost and 1ow-power transceiver that can be used for short range high speed wireless communication over the multipath channel. The successful deployment of TH-UWB systems strongly depends on the development of pulse waveforms, modulation techniques and system complexity. The TH-...