A time-reversal (TR) approach with multiple signal classification (MUSIC) provides super-resolution for detection and localization using multistatic data collected from an array antenna system. The theory of TR-MUSIC assumes that the number of antenna elements is greater than that of scatterers (targets). Furthermore, it requires many sets of frequencydomain data (snapshots) in seriously noisy ...

In this letter, a random chessboard coding metasurface is designed to reduce radar cross section (RCS). We select wideband and polarization-independent 2-bit unit cell arrange the proposed metasurface. Combining super cells by convolution operations sequence using particle swarm optimization method, thus, reflected waves can be diffused uniformly. Compared with conventional metasurfaces, increa...

Cooling indoor spaces in hot weather conditions requires a significant amount of energy. To reduce energy consumption, light control windows and facades buildings is great way. In this study, we propose facile method to fabricate flexible cholesteric liquid crystal (CLC) polymer reflector that can the reflection infrared (IR) selectively without interfering with visible light. end, fabricated s...

This research focuses on the design of a super wideband (SWB) antenna and its two-port multiple input output (MIMO) configurations. The is designed to cover spectrum ranging from 1.42 GHz 40 GHz, with additional feature tri-notch band functionality. respective spectrums 3.5 5.8 10.5 which are worldwide assigned for 5th generation (5G), sub-6-GHz applications, Wireless local area network (WLAN),...

The pomising uses of near infrared (NIR) phosphor converted light emitting diodes (pc-LEDs), including non-destructive testing and biological implementations, are endless. It is still difficult to create wideband NIR phosphors with sufficient heating steadiness for a variety uses. study herein introduces the Sr3Ga2Ge4O14:Cr3+, its creation procedure through expreiments as well influneces on LED...

The performance of automatic speech recognition based on coded-decoded speech heavily depends on the quality of the transmitted signals, determined by channel impairments. This paper examines relationships between speech recognition performance and measurements of speech quality and intelligibility over transmission channels. Different to previous studies, the effects of super-wideband transmis...

This paper describes a multichannel super-heterodyne signal analyzer, called the Spectrum Analysis Solution (SAS), which performs multi-purpose spectrum sensing to support spectrally adaptive and cognitive radar applications. The SAS operates from ultrahigh frequency (UHF) to the S-band and features a wideband channel with eight narrowband channels. The wideband channel acts as a monitoring cha...

This paper describes wideband directional channel measurements conducted at the 5.2 GHz carrier frequency in two different indoor scenarios. Based on the measurement results, a new statistical wideband indoor channel model which incorporates both the clustering of multipath components (MPCs) and the correlation between the spatial and temporal domains is proposed. MPC parameters are estimated u...