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In this paper, we study the energy-efficient resource allocation (EERA) for heterogeneous networks, where different quality of service (QoS) requirements, including minimum-rate guarantee services and best effort (BE) services are taken into consideration. We formulate EERA scheme as a mixed-integer non-convex optimization problem, in which the power and sub- carrier allocation are jointly optimized...
Abstract-We propose a non-cooperative game- theoretic power allocation (NGPA) scheme for interference mitigation in long term evolution (LTE) uplink in this paper. We first set up the interference model employing conventional soft frequency reuse (SFR) scheme for inter-cell interference coordination (ICIC) in a nineteen-cell LTE network. Since each user may selfishly maximize its own performance in...
In this letter, we propose a low-complexity game-theoretic approach for energy-efficient resource allocation in a two-tier heterogeneous network. We measure the energy efficiency (EE) by “Revenue per Cost” in the utility domain considering both power allocation and interference coordination. Since global optimization for maximizing the overall EE is computationally expensive, we transform this nonconvex...
For orthogonal frequency-division multiplexing (OFDM) communication systems, the frequency offset caused by time-varying channels induces the loss of orthogonality among subcarriers, and results in Intercarrier Interference (ICI), which seriously degrades the performance of OFDM systems. A novel iterative detection based on parallel interference cancellation is proposed in this paper. The received...
In order to avoid tremendous attack from malicious computer programs, CAPTCHA (Completely Automated Public Turing test to tell Computers and Human Apart) mechanism has been introduced to distinguish humans and computers. Due to the fast development of pattern recognition and artificial intelligence technology, there are increasing safety loopholes concerning traditional 2D static CAPTCHAs, resulting...
While cyclic prefix (CP) is no larger than the delay span of wireless channels in an orthogonal frequency division multiplexing (OFDM) system, inter-block interference (IBI) and inter-carrier interference (ICI) will occur and the performance of the system will be deteriorated. If OFDM is designed with long enough CP, the efficiency of OFDM modulation is significantly reduced. To effectively mitigate...
For orthogonal frequency division multiplexing (OFDM) communication systems, the frequency offset in mobile radio channels distort the orthogonality between sub-carriers, which results in intercarrier interference (ICI) and seriously degrades the performance of systems. In this paper, based on ICI coefficients analysis, a novel precoder design scheme is proposed for mitigation ICI in OFDM mobile systems...
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