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Pareto Optimal Power Control Scheduling for OFDMA Networks

Pareto Optimal Power Control Scheduling for OFDMA Networks

引用

IEEE Vehicular Technology Conference

作者： Harald Burchardt Sinan Sinanovic Gunther Auer Harald Haas Institute for Digital Communications Joint Research Institute for Signal and Image Processing The University of Edinburgh DOCOMO Euro-Labs

ISBN: (纸本)9781467318808

In this paper, a novel scheduling mechanism that enhances both network spectral and energy efficiency is presented. In Pareto Optimal Scheduling (POS), mobile stations (MSs) are scheduled based on path gains such that the sufficient conditions for Pareto optimal power control (POPC) are fulfilled. This is performed in such a manner to maximise the number of concurrently transmitting MSs. Furthermore, a Stepwise Removal (SR) algorithm is introduced for the situation where links do not meet the sufficient conditions for power control. In this case, links are removed in order for other MSs to achieve their signal-to-interference-plus-noise ratio (SINR) targets. The targets of these remaining MSs are updated to prevent losses in system spectral efficiency caused by the link removals. Large network simulation results show that significant gains in spectral efficiency can be achieved over standard power control techniques, while additionally providing substantially improved energy efficiency.

关键词： Power control spectral efficiency Sufficient conditions Energy efficiency OFDMA Simulation results Control technology

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An energy saving base station employing spatial modulation

An energy saving base station employing spatial modulation

引用

IEEE International Workshop on Computer-Aided Modeling, Analysis, and Design of Communication Links and Networks, CAMAD

作者： Athanasios Stavridis Sinan Sinanovic Marco Di Renzo Harald Haas Peter Grant Institute for Digital Communications Joint Research Institute for Signal and Image Processing Institute for Signal and Image Processing University of Edinburgh UK French National Center for Scientific Research (CNRS) University of Paris Sud-XI France

In this paper, we evaluate the energy efficiency of a multi-antenna Base Station (BS) employing Spatial Modulation (SM). Taking advantage of the single Radio Frequency (RF) chain configuration of SM, we show that SM offers a significant total power reduction compared to other multi-RF chain Multiple-Input Multiple-Output (MIMO) architectures. For the same RF transmit power, we demonstrate that the total power saving of SM scales linearly with the number of RF chains required by other MIMO schemes. Furthermore, we clarify that for the same ergodic capacity, SM has a significant advantage in energy efficiency compared to the studied multi-RF chain MIMO configurations. In addition, for a number of transmit antennas larger than two, we establish that SM results in higher ergodic capacity than Space-Time Block-Coding (STBC), combined with significant power saving. For a BS with 8 transmit antenna, the achieved power saving of SM can reach up to almost 90%. Finally, based on simulation results, we demonstrate that the energy efficiency (bits/J) of the studied MIMO schemes exhibits a maximum as function of ergodic capacity, and it is further shown that this maximum is several times higher in SM compared to the studied state-of-the-art MIMO schemes.

关键词： Power demand Radio frequency MIMO Transmitting antennas

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Pareto Optimal SINR Scheduling for Femto-cell Deployment in Wireless Networks

Pareto Optimal SINR Scheduling for Femto-cell Deployment in ...

引用

IEEE Vehicular Technology Conference

ISBN: (纸本)9781467318808

In this paper, Pareto Femto-Cell Scheduling (PFCS), a novel scheduling mechanism for randomly deployed femto-cells, is presented. Here, the signal-to-interference-plus-noise ratio (SINR) targets of femto-users are adapted such that the sufficient conditions for Pareto optimal power control (POPC) are fulfilled. Furthermore, interference from full bandwidth users is managed such that as many mobile stations (MSs) as possible can transmit. Due to the random nature of femto-base station (FBS) deployment, interference graphs are used to group femto-cells (and hence, users) such that target spectral efficiencies can be achieved at Pareto optimum power. Simulation results show that PFCS achieves significant system capacity gains over other SINR-target-based power allocation techniques, while maximising coverage in dense mobile environments. Furthermore, substantial power savings can be achieved.

关键词： Wireless networks SINR system capacity power splitting Power factor correction spectral efficiency deployment Sufficient conditions Coverage Interference graphs

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Optimal Power Allocation in Spatial Modulation OFDM for Visible Light Communications

Optimal Power Allocation in Spatial Modulation OFDM for Visi...

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IEEE Conference on Vehicular Technology (VTC)

作者： Xiao Zhang Svilen Dimitrov Sinan Sinanovic Harald Haas Institute for Digital Communications Joint Research Institute for Signal and Image Processing School of Engineering University of Edinburgh Edinburgh UK

This paper constructs a model for Optical Spatial Modulation Orthogonal Frequency Division Multiplexing (O-SM-OFDM). It investigates the effects of different power allocation schemes on bit error ratio (BER) performance. Optical features such as the DCO technique, the LED non-linearity and the indoor optical channel are considered. Under power constraint, when making power difference between transmitters, we discussed trade-off between the accuracy of the spatial domain bits detection and that of signal domain bits detection. We investigated the relationship between transmitter power surplus, spatial BER, signal BER, system total BER and signal to noise ratio (SNR). The optimal point of transmission power difference is found to be around 11.5 dB.

关键词： Optical transmitters Bit error rate Optical receivers Light emitting diodes Optical modulation

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An enhanced solutioning design for military tactical voice communication systems

An enhanced solutioning design for military tactical voice c...

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Wee-Tong Lim Hargobind Singh Sinan Sinanović Harald Haas Faculty of Engineering National University of Singapore Singapore Joint Research Institute for Signal Image Processing University of Edinburgh UK

ISBN: (纸本)9781457721182

Great emphasis has always been placed on military communication especially in the wireless spectrum. There is a need for more robust links with higher probability of intercept at the reception end and lower bit error rate (BER) at the transmission front. This is coupled with the requirement to have minimum exposure to loss or distortion of information. In this paper, we propose an enhanced solutioning design based on receiver and transmitter implementation to develop a wider encompassing solution. The receiver implementation will include the integration of a Speech Enhancement System (SES) where methods for noise estimation and reduction will be briefly introduced. The emphasis is on the employment of Arc-Tangent Square Root (ATSR) nonlinear device in the speech enhancement module for harmonic regeneration. For transmitter implementation, we propose a new modulation scheme - Simultaneous Spatial Modulation (SSM) - that reduces power consumption for the same bit error rate (BER) or given the same power, reduces transmission error, thereby increasing the rate of effective communication. Simulation results are presented to verify the effectiveness of the proposed modulation scheme.

关键词： Decision support systems Conferences Industrial electronics Harmonic analysis

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Distributed and autonomous resource allocation for femto-cellular networks

Distributed and autonomous resource allocation for femto-cel...

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Asilomar Conference on signals, Systems & Computers

作者： Harald Burchardt Zubin Bharucha Harald Haas Institute for Digital Communications Joint Research Institute for Signal and Image Processing University of Edinburgh Edinburgh UK DaCOMa Euro-Laboratories Munich Germany

ISBN: (纸本)9781467350501

A distributed and autonomous technique for resource and power allocation in femto-cell networks is presented. Resource blocks (RBs) are assigned to the user(s) in each cell individually without coordination between base stations (BSs). The allocatability of each resource is determined using only local information: · the user's required rate; · the quality of the desired signal; · the level of interference incident on each RB; and · the frequency-selective fading on each RB. Using fuzzy logic, these inputs are combined to determine which RBs are most suitable for allocation in a particular cell. A comprehensive study of this system yields a staggering system performance improvement over state-of-the-art interference coordination techniques.

关键词： RBs Femto-Cellular Networks improvement ion microprobe analysis Resource utilization Rubidium power splitting

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Comparison of the statistical properties of the LTE-A and IMT-A channel models

Comparison of the statistical properties of the LTE-A and IM...

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IEEE Conference on Wireless Communications and Networking

作者： Qi Yao Yi Yuan Ammar Ghazal Cheng-Xiang Wang Longyuan Luan Xiaofeng Lu Joint Research Institute for Signal and Image Processing Heriot-Watt University Edinburgh UK Huawei Technologies Company Limited Xi'an China

For the design and performance evaluation of advanced wireless communication systems employing multiple-input multiple-output (MIMO) technologies, realistic MIMO channel models with a good tradeoff between accuracy and complexity are indispensable. This paper compares the statistical properties of the two latest standardized MIMO channel models: Long Term Evolution-Advanced (LTE-A) and IMT-Advanced (IMT-A) channel models. Closed-from expressions are derived for the spatial cross-correlation function (CCF), temporal autocorrelation function (ACF), envelope level-crossing rate (LCR), average fading duration (AFD), power delay profile (PDP), and frequency correlation function (FCF) for both models. Simulation results are provided which can match the corresponding theoretical derivations very well, demonstrating the correctness of both theoretical and simulation results. The LTE-A channel model is simple but has significant flaws in terms of the accuracy. It can only support system bandwidths up to 50 MHz, not the claimed 100 MHz, and only describes the average spatial-temporal properties of MIMO channels. The IMT-A channel model is complex with more model parameters but has better accuracy. It allows us to simulate the variations of different MIMO channel realizations and can indeed support system bandwidths up to 100 MHz.

关键词： Channel models MIMO Correlation Antennas Simulation Accuracy Arrays

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A sample-mode packet delay variation filter for IEEE 1588 synchronization

A sample-mode packet delay variation filter for IEEE 1588 sy...

引用

International Conference on ITS Telecommunications (ITST)

作者： Margaret Anyaegbu Cheng-Xiang Wang William Berrie Joint Research Institute for Signal and Image Processing School of EPS Heriot-Watt University Edinburgh UK TES Electronic Solutions Limited Edinburgh UK

Recent studies have shown that the delay distribution of IEEE 1588 synchronization traffic varies with the characteristics and amount of the background traffic in the network, and influences the choice of packet selection filters. In this paper, we characterize the delay profile of an Ethernet cross-traffic network statically loaded with one of the ITU-T network models and a larger Ethernet inline traffic loaded with uniformly-sized packets. We also propose an iterative sample-mode packet delay variation (PDV) filter and use numerical simulations in OPNET to illustrate the performance of the filter in the networks. We compare the performance of the proposed PDV filter with those of the existing sample minimum, mean, and maximum filters and observe that the sample-mode filtering algorithm is able to match or outperform other types of filters, at different levels of network load.

关键词： Delay Synchronization Matched filters Filtering algorithms Optical filters Clocks

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Structure Optimisation of Spatial Modulation over Correlated Fading Channels

Structure Optimisation of Spatial Modulation over Correlated...

引用

IEEE Global Communications Conference

作者： Xiping Wu Sinan Sinanovic Marco Di Renzo Harald Haas Institute for Digital Communications Joint Research Institute for Signal and Image Processing School of Engineering The University of Edinburgh French National Centre for Scientific Research (CNRS) Laboratory for Signals and Systems (LSS) Ecole Superieure Electricite (SUPELEC)

ISBN: (纸本)9781467309202

A unique characteristic of spatial modulation (SM) is the three dimensional constellation diagram. This enables to trade-off traditional signal constellation diagrams with spatial constellation diagrams where the latter is denned by the physical antenna array. In this paper we investigate the optimum pairs of signal and spatial constellation sizes with respect to average bit error probability (ABEP) and energy efficiency. The analysis is performed for varying antenna correlations and channel conditions. Both numerical and closed-form results are presented which show that a significant performance gain can be obtained when the optimal constellation pairs are used.

关键词： Constellation diagram SPATIAL MODULATION correlated fading channel CONSTELLATIONS ABER Antenna arrays Energy efficiency

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Secrecy Capacity of Space Keying with Two Antennas

Secrecy Capacity of Space Keying with Two Antennas

引用

IEEE Vehicular Technology Conference

作者： Sinan Sinanovic Nikola Serafimovski Marco Di Renzo Harald Haas Institute for Digital Communications Joint Research Institute for Signal and Image Processing School of Engineering The University of Edinburgh French National Centre for Scientific Research (CNRS) Laboratory for Signals and Systems (LSS) Ecole Superieure d'Electricite (SUPELEC)

ISBN: (纸本)9781467318808

Spatial modulation (SM) and space shift keying (SSK) use only one out of several transmit antennas at a time to transmit data via an antenna index. In such a system, the information is encoded by exploiting channel randomness i.e. the fact that channels between different transmit and receive antennas are random. This difference is used to distinguish among the transmit antennas. While SSK uses only antenna index to transmit data, SM also uses ordinary signal modulation. In wireless secrecy systems, one of the key performance measures is secrecy capacity. It specifies the rate at which the transmitter can communicates on the main link to the desired receiver while this information cannot be decoded by the eavesdropper. We investigate SM and SSK in the context of wireless secrecy capacity when the underlying modulation and the difference between the legitimate and eavesdropper signal to noise ratios (SNRs) are varied.

关键词： transmitting antennas Privacy ANTENNA Samarium STIFF SKIN SYNDROME signal modulation signal to noise ratios keying TRANSMITTING Random Number Generators

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