Management of narrow directional beams is critical for mm-wave communication systems. Translational or rotational motion the user can cause misalignment transmit and receive with base station losing track mobile. Reacquiring take about one second in 5G New Radio systems significantly impair performance applications, besides being energy intensive. It therefore important to manage continually ma...

Subspace methods are essential to high-resolution environment sensing in the emerging unmanned systems, if further combined with millimeter-wave (mm-Wave) massive multi-input multi-output (MIMO) technique. The estimation of signal/noise subspace, as one critical step, is yet computationally complex and presents a particular challenge when developing low-complexity automotive radars. In this wor...

The output power of a cw Nd:YAG laser was stabilized in a dc-coupled feedback loop with a low-noise multiphotodiode detector and an electro-optic amplitude modulator in the frequency band from 1 Hz to 1 kHz. For the first time, to our knowledge, an independently measured relative power noise of 2.4 x 10(-9) Hz(-1/2) at 10 Hz was achieved, fulfilling the power stability requirements of the Advan...

This paper presents an improved indoor localization system based on RF and ultrasonic signal which we named SNSH system. This system composes of a transmitter mounted in a mobile target, and a series of receiver nodes which are managed by a coordinator. By measuring Time Delay of Arrival (TDoA) of RF and ultrasonic signal from the transmitter, distance from target to receiver node is calculated...

Here we present the design of the fast-ion collective Thomson scattering receiver for millimeter wave radiation installed at ASDEX Upgrade, a tokamak for fusion plasma experiments. The receiver can detect spectral power densities of a few eV against the electron cyclotron emission background on the order of 100 eV under presence of gyrotron stray radiation that is several orders of magnitude st...

Abstract Increasing data rates in wireless communications are accompanied with the need for new unoccupied and unregulated bandwidth electromagnetic spectrum. Higher carrier frequencies lower THz frequency range might offer solution future indoor communication systems of 100 Gbit/s beyond that cannot be located elsewhere. In this review, we discuss propagation channel measurements an extremely ...