[PDF] Top 20 Power allocation, bit loading and sub carrier bandwidth sizing for OFDM based cognitive radio
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Power allocation, bit loading and sub carrier bandwidth sizing for OFDM based cognitive radio
... conventional OFDM systems, optimum power allo- cation that maximizes the channel capacity under a total power budget is water-filling ...when OFDM is used for the SU system in a CR scenario, ... See full document
24
Efficient Power Loading in MIMO OFDM Based Cognitive Radio Networks
... optimal power which should be allocated for an antenna of a sub-carrier by use of Equation (9) demands some complex and time con- suming ...a sub-optimal method for solving the prob- lem (P1) ... See full document
9
LDPC Coded OFDM Transmission Based on Adaptive Power Weights in Cognitive Radio Systems
... used power weights of OFDM sig- nals in CR subcarriers at the secondary transmitter to reduce the estimation errors of detected ...the power weights obtained in Phase ...interference power of ... See full document
9
Computationally Efficient Power Allocation Algorithm in Multicarrier-Based Cognitive Radio Networks: OFDM and FBMC Systems
... total power constraint with the consideration of the per subcarrier power constraint caused by the PUs interference ...subcarrier power constraint is evaluated based on the pathloss factor ... See full document
13
Subcarrier allocation based simultaneous wireless information and power transfer for multiuser OFDM systems
... wireless OFDM downlink system consisting of one cognitive base station (CBS) and k ...The OFDM system bandwidth is assumed to be equally divided into n (n ≥ k) ...of sub- carriers are ... See full document
7
Optimal Power Allocation and Power Control Parameter in OFDM Based Cognitive Radio Systems
... (OFDM)-based cognitive radio (CR) systems, the optimized algorithms for sub-carrier power allocation face the problems of complex iterative calculation and ... See full document
13
Full Filling Subcarrier Power Allocation in OFDMA Based Cognitive Radio Systems
... spectrum, OFDM-based Cogni- tive Radio (CR) has been considered widely as a solution to ameliorate spectrum ...being based on OFDMA technology, capacity of a CR system de- pends not only on ... See full document
8
Joint Fair Resource Allocation for Opportunistic Spectrum Sharing in OFDM-based Cognitive Radio Networks
... (OFDM)-based cognitive radio net- work, where the primary system leases a fraction of its sub- carriers to the secondary system in exchange for the sec- ondary users (SUs) acting as ... See full document
5
Capacity Calculation and Sub Optimal Power Allocation Scheme for OFDM Based Systems
... the power allocated to the subcarrier as well as the spectral distance between particular subcarrier ...intelligent radio resource man- agement is needed for the dynamic allocation of radio ... See full document
6
1. Different power loading allocation schemes for ofdm based cognitive radio system
... the radio frequency spectrum is a scarce natural resource so its efficient use is very ...of cognitive radio system. In this paper, various powers loading algorithm like uniform, ... See full document
10
Implementation of Energy-Efficient Resource Allocation for OFDM-Based Cognitive Radio Networks
... Resource Allocation (RA) is one of the most important problems in OFDM-based wireless ...an OFDM system, minimize the transmission power, or support more users with given ... See full document
6
Implementation of Digital Video Broadcasting Terrestrial (DVB T) using Orthogonal Frequency Division Multiplexing (OFDM) on Physical Media Dependent Sub layer
... ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING OFDM OFDM is a multi-carrier modulation technique where data symbols modulate a sub-carrier which is taken from orthogonally separated sub-carr[r] ... See full document
6
Probabilistical Robust Power Control for Cognitive Radio Networks under Interference Uncertainty Conditions
... transmit power of each user is the main source of interference to other ...the power control is necessary and naturally one of the key technologies of this ...A power allocation strategy is ... See full document
18
SEGMENTATION OF BLOOD VESSELS USING IMPROVED LINE DETECTION AND ENTROPY BASED THRESHOLDING
... MIMO OFDM systems can be viewed as simple extensions of the eigenmodes in MIMO systems in single-carrier transmission, which is suitable for the analysis of system capacity other than link adaptation ... See full document
11
OFDM sub carrier allocation algorithm for a multiple user data enhanced radio server (MUDERS) using a general purpose processor platform
... higher power than normal information- carrying ...symbols. Carrier frequency and timing offsets may manifest themselves as differences between the expected phase of the pilot data symbols and the actual ... See full document
6
Joint Beamforming, Power and Channel Allocation in Multi-User and Multi-Channel Underlay MIMO Cognitive Radio Networks K. C. Sriharipriya, R. V. Haripriya, R. Joshnadevi
... via other mobiles. Multi-hop ideas are also utilized in cellular and wireless LAN system to provide higher quality of service power savings and extended coverage. The relay channel was introduced by Van der Meulen ... See full document
7
The subcarrier multiplexing/wavelength division multiplexing for radio over fiber
... The mobile communication architecture shown that evolution from 1G to the latest generation focused to efficiency and effectively of using frequency spectrum allocation. Due to the channel allocation ... See full document
23
Performance Enhancement of Grouped MCCDMA MIMO System through Power Control Using Water Filling Game Theory under Imperfect Channel State Condition
... IWFA based power control and sub carrier group assignment ...The power distribution to each user using IWFA is modeled based on the SINR value as an objective function which is ... See full document
11
A new low-cost discrete bit loading using greedy power allocation
... Referring to Table I and Table II the com- putational complexity of both GPA and QAM- L-GPA algorithms is summarised in Table III, whereby the no. of operations is assessed for each algorithm. Both subchannels “no order” ... See full document
9
Joint sub carrier pairing and resource allocation for cognitive networks with adaptive relaying
... same OFDM cooperative system described in Section ...into OFDM with several sub- carriers whose total number is equal to ...N sub-carriers, each having a f ...interference power ... See full document
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