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This work demonstrates the distributed joint selfoptimization of power and decoding order, to alleviate uplink intercell interference in a heterogeneous network, with signal to interference ratio constraints. This problem can be formulated as a potential game of coupled action space among the basestations. However, best response dynamics of this game require global channel knowledge at all cells....
Future mobile communication networks will require enhanced network efficiency and reduced system overhead due to their user density and high data rate demanding applications of the mobile devices. Research on Blind Interference Alignment (BIA) and Topological Interference Management (TIM) has shown that optimal Degrees of Freedom (DoF) can be achieved, in the absence of Channel State Information (CSI)...
In-Band Full-Duplex (FDX) and MultiPacket Reception (MPR) are two transmission technologies that can be used together to improve the overall network capacity. However, the FDX Self-Interference Cancellation (SIC) techniques only filter part of the transmitted signal from the reception. This paper analyses how the FDX SIC residual noise influences the performance of MPR systems. It considers power...
This paper investigates the performance and design of successive interference cancellation (SIC) receiver for downlink non-orthogonal multiple access (NOMA) combined with 2-by-2 open-loop single-user (SU)-MIMO. Compared to NOMA with 1-by-2 SIMO (Single Input Multiple Output), for NOMA with 2-by-2 SU-MIMO we have to deal with both inter-user and interstream interference at the receiver of each user...
Successive interference cancellation (SIC), which allows one to recover additional information from otherwise lost collision signals, has been proposed in a variety of communication systems. In this paper, we introduce a random access protocol operating on channel supporting SIC that achieves a maximum stable throughput (MST) of 1. To the best of our knowledge, the highest MST achieved on such a channel...
The achievable rate region of a K-user Gaussian multiple access channel (GMAC) is well known. Several schemes have been proposed to achieve some points in this region with minimal encoding and decoding complexities such as successive interference cancelation and successive integer forcing. But these schemes require coordination among the nodes or with the base station for choosing the rates of transmission...
In dense wireless scenarios, and particularly under high traffic loads, the design of efficient random access protocols is necessary. Some candidate solutions are based on Direct-Sequence Spread Spectrum (DS-SS) combined with a Successive Interference Cancellation (SIC) demodulator, but the performance of these techniques is highly related to the distribution of the users received power. In that context,...
ALOHA-type protocols became a popular solution for distributed and uncoordinated multiple random access in wireless networks. However, such distributed operation of the Medium Access Control (MAC) layer leads to sub-optimal utilization of the shared channel. One of the reasons is the occurrence of collisions when more than one packet is transmitted at the same time. These packets cannot be decoded...
This paper focuses on the beneficial effects brought by the presence of multiple receivers to a slotted Aloha scheme. Starting from an analytical angle, we review and compare some recent results that characterize the throughput of such systems under different channel models, based on the assumption that incoming powers at receivers follow an i.i.d. distribution. While practical in some scenarios,...
LTE in unlicensed bands (LTE-U) holds the promise of alleviating the licensed spectra scarcity and enhancing capacity by utilizing the unlicensed spectra. However, once LTE-U accesses an unlicensed band, there is almost no any opportunity for unlicensed systems (e.g. 802.11 WLAN) with inferior control abilities and CSMA/CA, to access that any more. In order to solve this unfair coexistence problem,...
As a promising multiple access techniques for 5th generation (5G) wireless systems, non-orthogonal multiple access (NOMA) has received many attentions recently. In this paper, we study the NOMA based downlink multi-user beamforming system, where the base station (BS) tries to transmit information to multiple user clusters and each beam serves one user cluster compromising of two users simultaneously...
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