Results 31 to 40 of about 6,450,359 (383)
Hardware Distortion Correlation Has Negligible Impact on UL Massive MIMO Spectral Efficiency [PDF]
IEEE Transactions on Communications, 2018 This paper analyzes how the distortion created by hardware impairments in a multiple-antenna base station affects the uplink spectral efficiency (SE), with a focus on massive multiple input multiple output (MIMO). This distortion is correlated across the
Emil Björnson +2 more
semanticscholar +1 more source
Spectral Efficiency of Multipair Massive MIMO Two-Way Relaying With Hardware Impairments [PDF]
IEEE Wireless Communications Letters, 2017 We consider a multipair massive multiple-input multiple-output (MIMO) two-way relaying system, where multiple pairs of single-antenna devices exchange data with the help of a relay employing a large number of antennas ${N}$ .
Jiayi Zhang +4 more
semanticscholar +1 more source
Enhancement of Spectral Efficiency FSO Links Using Linear Polarizer-Based MLPolSK Detection
IEEE Access, 2020 This paper proposes the enhancement of spectral efficiency (SE) by linear polarizer based multilevel linear polarization shift keying (MLPolSK) detection in free-space optical (FSO) communication.
Yan-Qing Hong +2 more
doaj +1 more source
On the relation between energy efficiency and spectral efficiency of multiple-antenna systems [PDF]
, 2013 Motivated by the increasing interest in energy-efficient communication systems, the relation between energy efficiency (EE) and spectral efficiency (SE) for multiple-input-multiple-output (MIMO) systems is investigated in this paper.
Chen, Yan +4 more
core +1 more source
IEEE Access, 2018 In this paper, we investigate the resource allocation problem for achieving spectral efficiency (SE) and energy efficiency (EE) tradeoff with users' minimum rate requirements in hybrid multi-carrier non-orthogonal multiple access (MC-NOMA) systems which ...
Zhengyu Song, Qiang Ni, Xin Sun
doaj +1 more source
Spectrally efficient multiplexing of chaotic light [PDF]
Optics Letters, 2010 We numerically demonstrate multiplexing and demultiplexing of two distinct chaotic optical signals with strongly overlapped spectra, which are generated by mutually coupled external-cavity semiconductor lasers. Demultiplexing is performed by complete chaos synchronization, while the lasers at the receiving end are optically injected with the same ...
Rontani, Damien +3 more
openaire +3 more sources
Binary CPMs With Improved Spectral Efficiency [PDF]
IEEE Communications Letters, 2016 We design new continuous phase modulation (CPM) formats which are based on the combination of a proper precoder with binary input and a ternary CPM. The proposed precoder constrains the signal phase evolution in order to increase the minimum Euclidean distance, and to limit the bandwidth expansion due to the use of a ternary CPM.
Messai, Malek +4 more
openaire +3 more sources
IEEE Access, 2019 To fully utilize the system resources and enhance the user experience, two types of offloading mechanisms are designed for massive MIMO (multiple-input-multiple-out) enabled heterogeneous cellular networks (HCNs).
Tianqing Zhou +6 more
doaj +1 more source
Spectral Efficiency and Energy Efficiency of OFDM Systems: Impact of Power Amplifiers and Countermeasures [PDF]
, 2013 In wireless communication systems, the nonlinear effect and inefficiency of power amplifier (PA) have posed practical challenges for system designs to achieve high spectral efficiency (SE) and energy efficiency (EE).
Ho, Chin Keong +2 more
core +1 more source
A Comprehensive Performance Evaluation of Universal Filtered Multi-Carrier Technique
IEEE Access, 2019 The Internet of Things (IoT) and machine-to-machine (M2M) communication will play an important role in future communications, but there is currently no ultra-reliable low-latency wireless communication theory that guides its design.
Shanlin Wei +3 more
doaj +1 more source