Results 21 to 30 of about 214,002 (340)
Maximal (v, k, 2, 1) Optical Orthogonal Codes with k = 6 and 7 and Small Lengths
Mathematics, 2023 Optical orthogonal codes (OOCs) are used in optical code division multiple access systems to allow a large number of users to communicate simultaneously with a low error probability.
Tsonka Baicheva, Svetlana Topalova
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Model division multiple access for semantic communications
Frontiers of Information Technology & Electronic Engineering, 2023 In a multi-user system, system resources should be allocated to different users. In traditional communication systems, system resources generally include time, frequency, space, and power, so multiple access technologies such as time division multiple ...
Ping Zhang +12 more
semanticscholar +1 more source
Journal of Telecommunications and Information Technology, 2023 A scheme of chaotic spreading sequence for multicarrier code division multiple access system (MC-CDMA) is proposed to estimate the transmission channel. This system spreads spectrum and identifies the channel, simultaneously.
Miloud Frikel +3 more
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Spatially Modulated Code-Division Multiple-Access for High-Connectivity Multiple Access [PDF]
IEEE Transactions on Wireless Communications, 2019 In order to take the advantages of spatial modulation (SM) and support the multiple-access (MA) communications requiring high connectivity, we integrate the SM with DS-CDMA to propose a SM/DS-CDMA scheme, which is in favor of attaining both antenna diversity and frequency diversity. Associated with the SM/DS-CDMA scheme, a range of linear and nonlinear
Peng Pan, Lie-Liang Yang
openaire +3 more sources
Studi Penentuan Spesifikasi Teknis Terminal Wideband Code Division Multiple Access (WCDMA)
Buletin Pos dan Telekomunikasi: Media Komunikasi Ilmiah, 2014 Sesuai dengan Kepmen No.504/KEP/M.KOMINFO/08/2012 tentang Izin Penyelenggaraan Jaringan Bergerak Seluler Indosat, pemerintah telah memberikan ijin kepada Indosat untuk menggelar teknologi WCDMA pada pita frekuensi 900MHz. Penggelaran teknologi WCDMA pada
Sri Ariyanti
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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
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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
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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
IEEE Photonics Journal, 2014 Light-emitting diodes (LEDs) have been deployed for various applications in our daily lives. Similarly, image sensors or cameras integrated into mobile phones have become common. Hence, visible light communication (VLC) using LED and mobile phone cameras
Shih-Hao Chen, C. Chow
semanticscholar +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
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