Results 21 to 30 of about 238,917 (261)

Cochannel interference cancelation for multiple access systems

Journal of Systems Engineering and Electronics, 2007
Abstract Many properties of frequency-hopped spread-spectrum multiple access (FH/SSMA), such as, robust-ness against frequency selective fading and jamming make it a preferred multiple access communication scheme. But cochannel interference (CCI) can seriously harm the system's performance. On the basis of the analysis of the CCI pattern of frequency
Wang Xia, Zhu Shihua, Sun Delong
openaire   +1 more source

Capacity bounds for multiple access-cognitive interference channel [PDF]

EURASIP Journal on Wireless Communications and Networking, 2011
Motivated by the uplink scenario in cellular cognitive radio, this study considers a communication network in which a point-to-point channel with a cognitive transmitter and a Multiple Access Channel (MAC) with common information share the same medium and interfere with each other.
Mirmohseni, Mahtab, Akhbari, Bahareh, Aref, Mohammad Reza   +2 more
openaire   +1 more source

Cognition and Cooperation in Interfered Multiple Access Channels

Entropy, 2017
In this work, we investigate a three-user cognitive communication network where a primary two-user multiple access channel suffers interference from a secondary point-to-point channel, sharing the same medium. While the point-to-point channel transmitter—
Jonathan Shimonovich, Anelia Somekh-Baruch, Shlomo Shamai (Shitz)   +2 more
doaj   +1 more source

D2D user and cellular user communication scheme based on NOMA

Dianzi Jishu Yingyong, 2023
LTE network adopts non orthogonal multiple access to enhance network capacity and D2D to improve spectral efficiency. Allowing D2D users to share the spectrum resources of cellular users using non orthogonal multiple access technology can alleviate the ...
Zhu Liyuan, Wang Bin, Wang Wennai
doaj   +1 more source

Heuristic Radio Resource Management for Massive MIMO in Satellite Broadband Communication Networks

IEEE Access, 2021
The advent of technologies allowing the implementation of flexible satellite payloads is opening up great opportunities to efficiently cope with non-uniform traffic conditions.
Piero Angeletti, Riccardo De Gaudenzi
doaj   +1 more source

Time-Hopping Multiple-Access for Backscatter Interference Networks [PDF]

GLOBECOM 2017 - 2017 IEEE Global Communications Conference, 2017
Future Internet-of-Things (IoT) is expected to wirelessly connect tens of billions of low- complexity devices. Extending the finite battery life of massive number of IoT devices is a crucial challenge. The ultra-low-power backscatter communications (BackCom) with the inherent feature of RF energy harvesting is a promising technology for tackling this ...
Wanchun Liu, Kaibin Huang, Xiangyun Zhou, Salman Durrani   +3 more
openaire   +1 more source

Non-Orthogonal Multiple Access for Large-Scale 5G Networks: Interference Aware Design

IEEE Access, 2017
Non-orthogonal multiple access (NOMA) is promoted as a key component of 5G cellular networks. As the name implies, NOMA operation introduces intracell interference (i.e., interference arising within the cell) to the cellular operation.
Konpal Shaukat Ali, Hesham Elsawy, Anas Chaaban, Mohamed-Slim Alouini   +3 more
doaj   +1 more source

The Kalman Filtering Blind Adaptive Multi-user Detector Based on Tracking Algorithm of Signal Subspace

Information, 2015
Multi-user detection is an effective method to reduce multiple access interference in code division multiple access (CDMA) systems. This paper discusses a signal subspace based blind adaptive multiuser detector and a Kalman filtering blind adaptive ...
Liqing Zhou, Henry Leung, Peng Xu, Guobao Ru, Quansheng Zhao, Da Xu   +5 more
doaj   +1 more source

Joint power control and user grouping for uplink power domain non-orthogonal multiple access

International Journal of Distributed Sensor Networks, 2021
Orthogonal multiple access schemes based on assignment of communication resource blocks among multiple contenders, although widely available, still necessitate an upper limit on the number of concurrent users for minimization of multiple-user ...
Bilal Ur Rehman, Mohammad Inayatullah Babar, Arbab Waheed Ahmad, Hesham Alhumyani, Gamil Abdel Azim, Rashid A. Saeed, Sayed Abdel Khalek   +6 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, Eddy Wijanto, Tzu-Chieh Lien, Po-Han Lai, Shin-Pin Tseng   +4 more
doaj   +1 more source