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Multiuser OFDM with adaptive subcarrier, bit, and power allocation
TLDR
The results show that the proposed algorithm outperforms multiuser OFDM systems with static time-division multiple access (TDMA) or frequency-divisionmultiple access (FDMA) techniques which employ fixed and predetermined time-slot or subcarrier allocation schemes. Expand
Alternating Minimization Algorithms for Hybrid Precoding in Millimeter Wave MIMO Systems
TLDR
Treating the hybrid precoder design as a matrix factorization problem, effective alternating minimization (AltMin) algorithms will be proposed for two different hybrid precoding structures, i.e., the fully-connected and partially-connected structures, and simulation comparisons between the two hybrid precode structures will provide valuable design insights. Expand
A Survey on Mobile Edge Computing: The Communication Perspective
TLDR
A comprehensive survey of the state-of-the-art MEC research with a focus on joint radio-and-computational resource management and recent standardization efforts on MEC are introduced. Expand
Cooperative Communications for Cognitive Radio Networks
TLDR
The use of cooperative spectrum sensing in cognitive radio systems to enhance the reliability of detecting primary users and a cognitive space-time-frequency coding technique that can opportunistically adjust its coding structure by adapting itself to the dynamic spectrum environment are considered. Expand
A robust timing and frequency synchronization for OFDM systems
TLDR
A robust symbol-timing and carrier-frequency synchronization scheme applicable to orthogonal frequency-division-multiplexing systems is presented and a new performance measure is introduced for timing estimation, based on the plot of signal to timing-error-induced average interference power ratio against the timing estimate shift. Expand
Group Sparse Beamforming for Green Cloud-RAN
TLDR
This paper proposes a new framework to design a green Cloud-RAN, which is formulated as a joint RRH selection and power minimization beamforming problem, and proposes a greedy selection algorithm, shown to provide near-optimal performance. Expand
Optimization of cooperative spectrum sensing with energy detection in cognitive radio networks
TLDR
The optimal voting rule for any detector applied to cooperative spectrum sensing is derived and the detection threshold when energy detection is employed, and a fast spectrum sensing algorithm is proposed for a large network which requires fewer than the total number of cognitive radios while satisfying a given error bound. Expand
Dynamic Computation Offloading for Mobile-Edge Computing With Energy Harvesting Devices
TLDR
A low-complexity online algorithm is proposed, namely, the Lyapunov optimization-based dynamic computation offloading algorithm, which jointly decides the offloading decision, the CPU-cycle frequencies for mobile execution, and the transmit power for computation offload and is shown to be asymptotically optimal via rigorous analysis. Expand
Channel estimation for OFDM transmission in multipath fading channels based on parametric channel modeling
TLDR
It is demonstrated that the use of the parametric channel model can effectively reduce the signal subspace dimension of the channel correlation matrix for the sparse multipath fading channels and, consequently, improve the channel estimation performance. Expand
Cooperative Spectrum Sensing for Cognitive Radios under Bandwidth Constraints
TLDR
A censoring method with quantization is employed to decrease the average number of sensing bits to the common receiver by censoring the collected local observations so as to detect the primary user accurately. Expand
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