Results 61 to 70 of about 7,314 (217)
IET Radar, Sonar &Navigation, Volume 18, Issue 12, Page 2447-2453, December 2024.A method is presented to passively synchronise data records via GNSS raw signals in a single record requiring only a GNSS antenna, an analogue‐to‐digital converter and computation hardware. The clock bias is estimated via the common view method with either full raw signal correlation or software‐based code correlation of individual signals from the GPS,
Erik Busley +3 more
wiley +1 more source
IET Communications, Volume 18, Issue 17, Page 1071-1078, October 2024.The study integrates dimmable constant weight polar‐coded non‐orthogonal multiple access (CWPC‐NOMA) with orthogonal space‐time block coding (OSTBC) for visible light communication (VLC). The proposed scheme enhances spectral efficiency and reliability while optimizing resource utilization and leveraging transmit diversity.
Oluwaseyi Paul Babalola, Vipin Balyan
wiley +1 more source
Ant-Colony-Based Multiuser Detection for MC DS-CDMA Systems
, 2007 In this contribution we present a novel ant colony optimization (ACO) based multi-user detector (MUD) designed for synchronous multi-carrier direct sequence code division multiple access (MC DSCDMA) systems. The operation of the ACO-based MUD is based on
Hanzo, L, Xu, C, Yang, L-L
core +1 more source
Investigating the relation between optimum guard interval and channel delay spread for a MC-CDMA system [PDF]
, 2012 This paper demonstrates a novel approach to determining the optimum guard interval for a multicarrier code division multiple access (MC-CDMA) system. Analytical expressions for useful and interference power are derived as a basis for comparison.
Gokalp, H, Kurnaz, C
core +1 more source
IET Science, Measurement &Technology, Volume 18, Issue 8, Page 429-442, October 2024.The impact of high‐power electromagnetic on the power amplifier inside the conductive enclosure has been investigated. By using the finite difference delay modelling numerical method as a stable method followed by the vector fitting method, the electromagnetic problem has become a circuit problem, which allows examining the response of the power ...
Ali Kalantarnia, Abdollah Mirzabeigi
wiley +1 more source
Crest Factor Reduction in MC-CDMA Employing Carrier Interferometry Codes
EURASIP Journal on Wireless Communications and Networking, 2004 This paper addresses signal compactness issues in MC-CDMA employing carrier interferometry codes using the measure of crest factor (CF). Carrier interferometry codes, applied to N -carrier MC-CDMA systems, enable 2N users to simultaneously share the
Natarajan Balasubramaniam +1 more
doaj +2 more sources
, 2005 —In multicarrier code-division multiple-access (MCCDMA), the total system bandwidth is divided into a number of subbands, where each subband may use direct-sequence (DS) spreading and each subband signal is transmitted using a subcarrier frequency.
Hanzo, L., Yang, L-L.
core
Initial synchronisation of wideband and UWB direct sequence systems: single- and multiple-antenna aided solutions [PDF]
, 2012 This survey guides the reader through the open literature on the principle of initial synchronisation in single-antenna-assisted single- and multi-carrier Code Division Multiple Access (CDMA) as well as Direct Sequence-Ultra WideBand (DS-UWB) systems ...
Hanzo, Lajos, Won, SeungHwan
core +1 more source
Advanced Functional Materials, Volume 34, Issue 38, September 18, 2024.A composite co‐assembled dehydropeptide‐based gel is designed for the orthogonal triggered release of doxorubicin and methotrexate. The incorporation of mesoporous silica‐coated gold nanorods and magnetic liposomes within the gel allows for the combined effects of sequential drug release through photothermia and magnetic hyperthermia, resulting in ...
Sérgio R. S. Veloso +13 more
wiley +1 more source
MAP Channel-Estimation-Based PIC Receiver for Downlink MC-CDMA Systems
EURASIP Journal on Wireless Communications and Networking, 2008 We propose a joint MAP channel estimation and data detection technique based on the expectation maximization (EM) method with paralel interference cancelation (PIC) for downlink multicarrier (MC) code division multiple access (CDMA) systems in the ...
Erdal Panayırcı +3 more
doaj +2 more sources