Results 21 to 30 of about 494,961 (258)

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

Multiple Access Outerbounds and the Inseparability of Parallel Interference Channels [PDF]

IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008
It is known that the capacity of parallel (multi-carrier) Gaussian point-to-point, multiple access and broadcast channels can be achieved by separate encoding for each subchannel (carrier) subject to a power allocation across carriers. In this paper we show that such a separation does not apply to parallel Gaussian interference channels in general.
Viveck R. Cadambe, Syed Ali Jafar
openaire   +2 more sources

Partial Interference and Its Performance Impact on Wireless Multiple Access Networks

EURASIP Journal on Wireless Communications and Networking, 2010
To determine the capacity of wireless multiple access networks, the interference among the wireless links must be accurately modeled. In this paper, we formalize the notion of the partial interference phenomenon observed in many recent wireless ...
Ka-Hung Hui, Wing Cheong Lau, Onching Yue   +2 more
doaj   +2 more sources

Interference mitigation for non-orthogonal multiple access in heterogeneous networks

Wireless Networks, 2023
Non-orthogonal multiple access (NOMA) technique is a promising alternative for enhancing network sum-rate while increasing the interference experienced by the users. In heterogeneous networks, the signal of a NOMA user is affected by three types of interference; intra-cell, inter-cell, and inter-tier.
Can Altay, Mutlu Koca
openaire   +2 more sources

Combining precoding and equalization for interference cancellation in MU-MIMO systems with high density users

EURASIP Journal on Wireless Communications and Networking, 2022
In multiple users (MU) multiple input multiple output (MIMO) systems, the non-orthogonal multiple access (NOMA) method can provide multiple access. However, a spectrum efficiency of NOMA method is restricted because of remaining an interference signal of
Nguyen Thu Phuong, Vu Van Son, Pham Thanh Hiep   +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

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

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

Multiple access interference rejection code: LS code

Journal of Communications and Networks, 2003
A new code, LS code, was proposed for the IMT-2000 CDMA system. The code has special properties during a specific time interval: 1) perfect autocorrelation, and 2) perfect crosscorrelation. Perfect autocorrelation means maximum autocorrelation for zero time-offset and zero autocorrelation for all other times during a specific time interval.
Dong Wook Roh, Dong Ku Kim
openaire   +2 more sources

Jointly Optimizing Resource Allocation, User Scheduling, and Grouping in SBMA Networks: A PSO Approach

Entropy
Blind Interference Alignment (BIA) and Sparse Code Multiple Access (SCMA) offer the potential for massive connectivity but face limitations. Our recently proposed Sparsecode-and-BIA-based Multiple Access (SBMA) scheme synergizes their strengths ...
Jianjian Wu, Chanzi Liu, Xindi Wang, Chi-Tsun Cheng, Qingfeng Zhou   +4 more
doaj   +1 more source