Results 11 to 20 of about 122,557 (242)

Electron-Mediator-Free Microfluidic Photocatalytic Coenzyme Regeneration with 100% Conversion Efficiency within 126 S. [PDF]

Adv Sci (Weinh)
Discover a groundbreaking mediator‐free photocatalytic method for coenzyme NAD(P)H regeneration using BiOBr nanosheets in a microfluidic chip. This study achieves 100% NAD+ to NADH conversion in 126 s, maintaining >87% efficiency over 32 h. Explore how photocatalysis and microfluidics combine to offer a sustainable, scalable solution for green ...
Chai Y, Wan L, Pang Z, Li X, Jia Z, Jiang H, Tsoi CC, Jia H, Shen J, Zhang Z, Long J, Xie F, Chen Y, Zhang X.   +13 more
europepmc   +2 more sources

Robust or nonrobust: On MC-DS-CDMA acquisition in LEO satellite communications

Digital Communications and Networks, 2023
Low Earth Orbit (LEO) satellite communications can provide global coverage in the sixth generation communication (6G) networks. To combat the strong Partial Band Interferences (PBIs) and multipath fading in LEO satellite communication systems, the ...
Entong Meng, Xiangyuan Bu, Jihong Yu, Jianping An, Xuanhe Yang   +4 more
doaj   +1 more source

Navigation With Cellular CDMA Signals—Part I: Signal Modeling and Software-Defined Receiver Design

IEEE Transactions on Signal Processing, 2018
A software-defined receiver (SDR) for navigation using cellular code-division multiple access (CDMA) signals is presented. The cellular forward link signal structure is described, and models for the transmitted and received signals are developed ...
Joe J. Khalife, Kimia Shamaei, Z. Kassas
semanticscholar   +1 more source

Performance Analysis of Multiple Input Multiple Output (MIMO) Multi-Carrier Code-Division Multiple Access (MC-CDMA) Combined with Quasi-Orthogonal Space Time Block Coding (QO-STBC) in Rayleigh Fading Channel

Positron, 2022
The need for a communication system with a higher data rate and mobility grows along with information and communication technology development. Combining MC-CDMA with the MIMO system and supporting the system with a good transmit diversity technique is a
Eka Kusumawardhani, Rina Pudji Astuti, Nachwan Mufti Adriansyah, Fitri Imansyah, Leonardus Sandy Ade Putra   +4 more
doaj   +1 more source

Blind multi-user combining at the base station for asynchronous CDMA systems [PDF]

, 1996
This paper studies the potential benefits of antenna arrays in cellular CDMA communications and proposes a powerful scheme to undertake the array processing at the base station in CDMA mobile systems.
Fernández Rubio, Juan Antonio, Muñoz Medina, Olga   +1 more
core   +1 more source

Sequence Design for Cognitive CDMA Communications under Arbitrary Spectrum Hole Constraint [PDF]

IEEE Journal on Selected Areas in Communications, 2014
To support interference-free quasi-synchronous code-division multiple-access (QS-CDMA) communication with low spectral density profile in a cognitive radio (CR) network, it is desirable to design a set of CDMA spreading sequences with zero-correlation ...
Su Hu, Zilong Liu, Y. Guan, Wenhui Xiong, G. Bi, Shaoqian Li   +5 more
semanticscholar   +1 more source

On the variable capacity property of CC/DS-CDMA systems [PDF]

, 2006
A complete complementary code based direct sequence code division multiple access (CC/DS-CDMA) system has been proposed recently as a potential candidate for beyond third generation (B3G) wireless communications.
Chen, HH, Song, YH, Wang, LP, Yang, Y
core   +1 more source

Detection Schemes With Low-Resolution ADCs and Spatial Oversampling for Transmission With Higher-Order Constellations in Terahertz Band

IEEE Access
In this work, we consider Terahertz (THz) communications with low-resolution uniform quantization and spatial oversampling at the receiver side, corresponding to a single-input multiple-output (SIMO) transmission.
Christian Forsch, Peter Zillmann, Osama Alrabadi, Stefan Brueck, Wolfgang Gerstacker   +4 more
doaj   +1 more source

MULTICHANNEL M-ARY BI-ORTHOGONAL KEYING

Information and Telecommunication Sciences, 2015
The new method of Multichannel M-ary Bi-Orthogonal Keying, its operating principle and performance studying are introduced in this paper. Utilized spectral efficiency and BER performance of this method are also studied in comparison with DS-CDMA. Overall
Kateryna P. Kovalchuk, Oleksandr V. Mazurenko   +1 more
doaj   +1 more source

Successive AF/DF Relaying in the Cooperative DS-CDMA Uplink: Capacity Analysis and its System Architecture [PDF]

, 2013
A successive relaying aided network (SRAN) is designed for a multi-user spread-spectrum scenario conceived for noncoherent (NC) detection in order to convert the typical 50% half-duplex relaying-induced throughput loss to a potential user-load reduction ...
Hanzo, Lajos, Li, Li, Wang, Li
core   +1 more source