Results 31 to 40 of about 342,890 (187)
Nantong Daxue xuebao. Ziran kexue ban, 2023 This study focuses on the transmission performance of extremely large-scale massive multiple-input multiple-output(XL-MIMO) systems based on user visible region(VR) dimensionality reduction.
WANG Jue; JING Haitao; GAO Ruifeng; SHI Quan
doaj +1 more source
Achieving the Uniform Rate Region of General Multiple Access Channels by Polar Coding [PDF]
, 2016 We consider the problem of polar coding for transmission over $m$-user multiple access channels. In the proposed scheme, all users encode their messages using a polar encoder, while a multi-user successive cancellation decoder is deployed at the receiver.
El-Khamy, Mostafa +3 more
core +1 more source
Achievable rate regions for bi-directional relaying
, 2008 In a bi-directional relay channel, two nodes wish to exchange independent messages over a shared wireless half-duplex channel with the help of a relay. In this paper, we derive achievable rate regions for four new half-duplex protocols and compare these to four existing half-duplex protocols and outer bounds.
Kim, Sang Joon +3 more
openaire +2 more sources
Directivity-Beamwidth Tradeoff of Massive MIMO Uplink Beamforming for High Speed Train Communication
IEEE Access, 2017 High-mobility adaption and massive multiple-input multiple-output (MIMO) application are two primary evolving objectives for the next generation high-speed train (HST) wireless communication system.
Xuhong Chen +4 more
doaj +1 more source
Secrecy Rate Region Enhancement in Multiple Access Wiretap Channel
Journal of Telecommunications and Information Technology, 2022 It is commonly known that physical layer security is achieved with a trade-off in terms of the achievable rate. Hence, security constraints generate rate losses in wiretap channels.
Shahid Mehraj Shah
doaj +1 more source
Design of superposition polar coding for binary-input less-noisy broadcast channels
ICT Express, 2017 In this study, we design a superposition polar code that can achieve the capacity region of binary-input less-noisy broadcast channels asymptotically. Simulation results show that a better rate region is achievable by superposition polar coding than by ...
Sungik Choi, Sae-Young Chung
doaj +1 more source
On achievable rates for multicast in the presence of side information [PDF]
, 2008 We investigate the network source coding rate region for networks with multiple sources and multicast demands in the presence of side information, generalizing earlier results on multicast rate regions without side information.
Bakshi, Mayank, Effros, Michelle
core +1 more source
Network Coding for Line Networks with Broadcast Channels
Entropy, 2012 An achievable rate region for line networks with edge and node capacity constraints and broadcast channels (BCs) is derived. The region is shown to be the capacity region if the BCs are orthogonal, deterministic, physically degraded, or packet erasure ...
Seyed Mohammadsadegh Tabatabaei Yazdi +1 more
doaj +1 more source
Capacity Region of the Symmetric Injective K-User Deterministic Interference Channel
, 2017 We characterize the capacity region of the symmetric injective K-user Deterministic Interference Channel (DIC) for all channel parameters. The achievable rate region is derived by first projecting the achievable rate region of Han-Kobayashi (HK) scheme ...
Avestimehr, A. Salman, Kiamari, Mehrdad
core +1 more source
Cooperative Relay Broadcast Channels [PDF]
, 2005 The capacity regions are investigated for two relay broadcast channels (RBCs), where relay links are incorporated into standard two-user broadcast channels to support user cooperation.
Liang, Yingbin, Veeravalli, Venugopal V.
core +4 more sources