Convex optimization–based multi-user detection in underwater acoustic sensor networks
International Journal of Distributed Sensor Networks, 2018 Multi-carrier code-division multiple access is an important technical means for high-performance underwater acoustic sensor networks. Nevertheless, severe multiple access interference is a huge challenge.
Jianping Wang +4 more
doaj +1 more source
Variable-Weight Optical Code Division Multiple Access System using Different Detection Schemes
Journal of Telecommunications and Information Technology, 2016 In this paper a Variable Weight OCDMA (VWOCDMA) system using KS code with Direct Decoding (DD), Complementary Subtraction (CS) and AND subtraction detections is proposed.
Saleh Seyedzadeh +2 more
doaj +1 more source
Multiple Access Techniques for Bipolar Optical Code Division in Wireless Optical Communications
IEEE Access, 2020 In this paper, multiple access techniques for bipolar optical code division are proposed for application in wireless optical communications. First, several fiber Bragg gratings (FBGs) and optical circulators are used to encode optical signals.
Hsu-Chih Cheng +4 more
doaj +1 more source
Multiple access based on three-stage modulation in multi-band OFDM-UWB system
Tongxin xuebao, 2007 According to the characteristics of multi-band orthogonal frequency-division multiplexing ultra-wideband（OFDM-UWB） system,a multiple access based on three-stage modulation（TSM-MA） was proposed.It combined multi-carrier code division multiple access（MC ...
BAO Zhi-hua +3 more
doaj +2 more sources
Carrier Sense Random Packet CDMA Protocol in Dual-Channel Networks [PDF]
, 2015 Code resource wastage is caused by the reason that many hopping frequency (FH) sequences are unused, which occurs under the condition that the number of the actual subnets needed for the tactical network is far smaller than the networking capacity of ...
Cui, P. +5 more
core +2 more sources
Defining Roles in Pediatric Palliative Care: Perspectives From Oncology and Palliative Care Teams
Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Early integration of pediatric palliative care (PPC) is associated with improved symptom management, quality of life, and healthcare utilization for children with cancer. Despite this, variation persists in how PPC is understood, operationalized, and integrated within pediatric oncology programs. In particular, ambiguity surrounding
Leeat Granek +13 more
wiley +1 more source
Chaotic Spread Spectrum Technology for Optical Code Division Multiple Access Passive Optical Network
Guangtongxin yanjiu, 2021 Aiming at the problem of capacity in Wavelength Division Multiplexing-Passive Optical Network (WDM-PON), Optical Code Division Multiple Access WDM-PON (OCDMA-WDM-PON) based on chaotic spread spectrum is proposed to expand the capacity and rate, ensuring ...
Li-wei YANG +4 more
doaj +1 more source
Spatial Modulated Multicarrier Sparse Code-Division Multiple Access [PDF]
IEEE Transactions on Wireless Communications, 2020 This paper proposes a novel spatial-modulated multicarrier sparse code-division multiple access (SM/MC-SCDMA) system for achieving massive connectivity in device-centric wireless communications. In our SM/MC-SCDMA system, the advantages of both MC signalling and SM are amalgamated to conceive a low-complexity transceiver.
Yusha Liu +4 more
openaire +3 more sources
, 2007 The network performance of a frequency division duplex and time division duplex (TDD) code division multiple access (CDMA)-based system is investigated using system parameters similar to those of the Universal Mobile Telecommunication System.
Blogh, J.S., Hanzo, L., Ni, S.
core +1 more source
Area spectral efficiency of soft-decision space–time–frequency shift-keying-aided slow-frequency-hopping multiple access [PDF]
, 2012 Slow-frequency-hopping multiple access (SFHMA) can provide inherent frequency diversity and beneficially randomize the effects of cochannel interference.
Hanzo, Lajos, Ngo, Hoang Anh
core +1 more source