Results 81 to 90 of about 4,433,394 (276)

Reduced-rank adaptive least bit-error-rate detection in hybrid direct-sequence time-hopping ultrawide bandwidth systems

, 2011
Design of high-efficiency low-complexity detection schemes for ultrawide bandwidth (UWB) systems is highly challenging. This contribution proposes a reduced-rank adaptive multiuser detection (MUD) scheme operated in least bit-errorrate (LBER) principles ...
Ahmed, Qasim, Sheng Chen, Yang, Lie-Liang, Lie-Liang Yang, Chen, Sheng, Qasim Zeeshan Ahmed   +5 more
core   +2 more sources

Volatile Memristive Devices With Tunable Temporal Dynamics For Event‐Based Sensing

Advanced Materials, EarlyView.
Tunable volatile memristive devices can serve various neural‐inspired tasks that require different time windows of information retention. The ionic‐based volatility of the presented Pt/a‐STO/TaOx/Ta device stack can be reproducibly and controllably tuned in multiple ways.
Dimitrios Spithouris, Johannes Hellwig, Hugh Greatorex, Clemens Wittberg, Panagiotis Koutsogiannis, César Magén, Elisabetta Chicca, Regina Dittmann   +7 more
wiley   +1 more source

Performance Comparison of FH/MC DS-CDMA with Single- and Multi-Carrier DS-CDMA

, 2000
In this contribution we review the slow frequency hopping multicarrier direct-sequence code-division multiple-access (SFH/MC DS-CDMA). Then, the system's performance is ecalated and compared to that of the conventional single-carrier (SC) DS-CDMA and MC ...
Yang, L-L., Hanzo, L.
core   +1 more source

Construction method and performance analysis of chaotic frequency-hopping sequences based on Logistic-Sine-Cosine mapping

Tongxin xuebao
In order to solve the problems of low dimensional chaotic mapping, limited chaotic behavior, and discontinuous chaotic interval, a new construction method of chaotic frequency-hopping sequence was proposed.
CAO Chunjie, WANG Yinglin, SUN Yang, TAO Hongfei, YANG Haoning, SHI Jingcheng, DAI Junhao, SUN Jingzhang   +7 more
doaj  

Bioengineered Interfaces for Peripheral Nerve Sensory Restoration

Advanced Materials, EarlyView.
Half of amputees abandon their prosthetics for lack of feeling. This review charts the full path from peripheral nerve injury to restored sensation, through surgical, regenerative, noninvasive, and implanted approaches, and shows how injury type and interface material properties determine which strategy can deliver naturalistic feedback, and why ...
Sydney Swedick, Salim El Hadwe, Kesi Liang, George G. Malliaras, Damiano G. Barone   +4 more
wiley   +1 more source

FPGA-Based Hardware Encryption of Power Line Patrol Drones

Zhongguo dianli, 2019
Communication of power line patrol UAV is currently protected with frequency hopping. However, malicious adversaries can steal sequence of frequency hopping and control the patrol UAV. In view of the security protection needs of patrol UAV in the process
Hao LUO, Sheng SU, Hao YANG, Nan LIN, Chen YUAN   +4 more
doaj   +1 more source

Framework Flexibility on Water Sorption and Transport in ZIF‐90: Insights from Neural‐Network Molecular Dynamics

Advanced Materials Interfaces, EarlyView.
A DeepMD‐based molecular dynamics framework is developed to investigate water adsorption in ZIF‐90, explicitly accounting for framework flexibility. Results show that atomistic flexibility significantly influences adsorption energetics, diffusion, and structural correlations, yielding nearly constant heat of adsorption and enhanced mobility.
Nick Mackus, Ionut Tranca, Veerapandian Ponnuchamy, Silvia Gaastra‐Nedea   +3 more
wiley   +1 more source

Research on high security G function algorithm

物联网学报, 2019
The differential frequency hopping (DFH) overcomes the limitation of frequency hopping and improves the ability to resist tracking interference.The G function determines the DFH sequence and directly affects the performance of DFH communication systems ...
Rui CHEN, Zan LI, Jia SHI, Lei GUAN
doaj   +2 more sources

Frequency-Hopping Microwave Generation With a Large Time-Bandwidth Product

IEEE Photonics Journal, 2018
We propose and demonstrate an approach to generating large time-bandwidth product (TBWP) frequency-hopping (FH) microwave waveforms by using an ultra-high-quality factor (Q) silicon microring resonator (MRR) with thermal tuning.
Feng Zhou, Xu Wang, Siqi Yan, Xiao Hu, Yuguang Zhang, Huaqing Qiu, Xi Xiao, Jianji Dong, Xinliang Zhang   +8 more
doaj   +1 more source

Further combinatorial constructions for optimal frequency-hopping sequences

Journal of Combinatorial Theory, Series A, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Gennian Ge, Ryoh Fuji-Hara, Ying Miao 0001   +2 more
openaire   +2 more sources