We study energy detection based spectrum sensing of SU (Secondary User) in cognitive radios. Due to the time varying nature wireless channels and PU (Primary activities, SINR (Signal Interference plus Noise Ratio) at receiver changes from slot a time-slotted system. Unlike conventional detector which uses fixed threshold for sensing, we dynamically adjust according SINR. By limiting average interference within target level, objective is maximize SU's rate using an optimized policy function,...

Background. Glioma is a common tumor that originated from the brain, and molecular targeted therapy one of important treatment modalities glioma. Apatinib small-molecule tyrosine kinase inhibitor, which widely used for However, underlying mechanism has remained elusive. Recently, emerging evidence proved remarkable anticancer effects ferroptosis. In this study, new ferroptosis-related apatinib inhibiting proliferation glioma cells was investigated, facilitated further study on inhibitory...

This paper presents the design and implementation of memory-based fast Fourier transform (FFT) processors with generalized efficient, conflict-free address schemes. We unified schemes three different FFT lengths, including single-power points, common nonsingle-power points applied a prime factor algorithm. Though cases differ in terms decomposition, they are all compatible architecture by way proposed Moreover, decomposition algorithm utilizes method, named high-radix-small-butterfly (HRSB),...

The latest development in perovskite solar cell (PSC) technology has been significantly influenced by advanced techniques aimed at passivating surface defects. This work presents a new approach called thermal imprinting-assisted ion exchange passivation (TIAIEP), which delivers different to conventional solution-based methods. TIAIEP focuses on addressing imperfections solid-state films using passivator that promotes specifically the defect sites within layer. By adjusting time and...

Due to high attenuation and large path loss, it is usually very difficult measure the channel characteristics of plasma sheath from received signal. This paper proposes a novel method them reflected Using finite-difference time-domain algorithm, electron density variation its impact on transmitted signals are investigated numerically. High correlations between these two observed both amplitude phase, which enables us online estimate one signal other for measurement modeling conveniently....

We theoretically investigate transmission-type SPR sensors with novel metallic-dielectric mixed gratings by rigorous coupled-wave analysis (RCWA), compared to the conventional dielectric based structure. It is found that transmittance efficiency and full width at half-maximum (FWHM) of transmission curve can be modulated increasing or decreasing metallic part. Therefore, appropriate proportion metal part will induce enhancement factor sensor merit. Furthermore, this structure also bring...

This paper presents an amplifier with low noise, high gain, power consumption, and linearity for electrocardiogram (ECG) recording. The core of this design is a chopper-stabilized capacitive-feedback operational transconductance (OTA). proposed OTA has two-stage structure, the first stage using combination current reuse cascode techniques to obtain large gain at second operating in Class A state better linearity. additionally uses DC servo loop (DSL) improve rejection offsets. implemented...

The Inverse Synthetic Aperture Radar (ISAR) has been proven to be an effective tool for space target sensing due its capability of performing high-resolution imaging. Since the component information spacecraft is key identification and diagnosis status, ISAR images with a clear complete representation typical components are much desired. This requires selection imaging time, during which certain good projection on image plane shape feature well conserved high resolution. In addition, fully...

Fixed-complexity Sphere Decoder (FSD) is a recently proposed technique for Multiple-Input Multiple-Output (MIMO) detection. It has several outstanding features such as constant throughput and large potential parallelism, which makes it suitable efficient VLSI implementation. However, to our best knowledge, no implementation of FSD been reported in the literature, although some FPGA prototypes with pipeline architecture have developed. These solutions achieve very high but at cost hardware...

Polar codes were first proposed by E. Arıkan in 2009 and have received significant attention recent years. Successive-cancellation (SC) belief-propagation (BP) decoding algorithms been applied some researchers to polar codes. However, unlike SC-based decoders, the performance optimization of BP-based decoders has not fully explored yet, especially regard impact number iterations on complexity. In this paper, a novel early stopping criterion based partial frozen bits for code is designed. The...

In LL-SST gravity mission, the intersatellite range and range-rate data are direct observable values, while acceleration can also be derived from through digital differentiation. Using data, people could avoid solving for variational equations of satellite motion simplify observation equations, but on other side, differentiation will amplify noises finally affect solved geopotential accuracy. order to give a quantitative answer, this paper analyses detects accuracy calculated by...

Multiple‐antenna systems are a promising approach to increase the data rate of wireless communication systems. One efficient possibility is spatial multiplexing transmitted symbols over several antennas. Many different MIMO detector algorithms exist for this multiplexing. The major difference between detectors resulting communications performance and implementation complexity, respectively. Particularly closed‐loop have attained lot attention in last years. In system, reliability information...

Fixed-complexity sphere decoder (FSD) is one of the most promising techniques for implementation multiple-input multiple-output (MIMO) detection, with relevant advantages in terms constant throughput and high flexibility parallel architecture. The reported works on FSD are mainly based software level simulations a few details have been provided hardware implementation. authors present study four-nodes-per-cycle architecture several examples VLSI 4×4 systems both 16-quadrature amplitude...

This paper presents a 12-bit 270MS/s pipelined analog-to-digital converter (ADC) without employing front-end sample-and-hold amplifier. A novel strategy is established to diminish the aperture error while maintaining both original tracking time and amplifying of multiplying digital-to-analog (MDAC). It matches signal paths between comparators MDAC in first stage by using proper timing sequence high-speed dynamic comparators. The measurement results show 63.7dB SNR 76.1dBc SFDR at 120.1MHz...

This paper presents an efficient conflict-free memory address scheme for arbitrary 2k-point memory-based FFT processors. The can support in-place strategy, continuous-flow mode, and variable size long sized FFT. More over, the adjust throughput by changing computation radix parallelism of arithmetic processing units according to specific implementation requirements. We have designed a configurable 128 — 2048 point processor LTE system. From results, we see proposed has excellent flexibility,...

Abstract Perovskite solar cells (PSCs) have achieved impressive efficiency, but their commercialization is limited by issues like chemical homogeneity within the perovskite films, leading to defects and phase segregation, which severely compromise stability performance of PSCs. This study presents a novel approach overcoming these barriers employing N,N ‐methylenebisacrylamide (MBA) as multifunctional crosslinking agent structure. MBA enhances uniformity both laterally vertically, improves...

This paper presents a novel design strategy and new architecture for multi-mode interleaver/deinterleaver, which are capable to implement any of the interleaving processes defined in IEEE 802.11 a/g/n, 802.16d/e, HiperLAN/2 wireless standards. To enable comparison, 36-mode interleaver/deinterleaver fully compliant 802.11n applications is presented. The proposed implemented SMIC 0.13 um 1.08 V 1P6M CMOS technology. maximum operating frequency 350 MHz corresponding power dissipation 9.27 mW....