Radio resource allocation in wireless OFDM systems

... exploiting multiuser diversity gain In order to achieve such an increase in throughput, radio resources need to be managed in an eﬃcient way by adapting to the instantaneous conditions of radio links ... variable for user l in BS n using modulation q on subcarrier k n is omitted in single-cell or distributed systems; k is omitted in single carrier systems; q is omitted in systems using ﬁxed modulation ... deployed Chapter Introduction in radio networks These techniques can also be used in OFDM systems to support multiple mobile terminals With many subcarriers available in OFDM systems, an intuitive way...

Báo cáo hóa học: " Research Article Resource Allocation in MU-OFDM Cognitive Radio Systems with Partial Channel State Information" potx

... for multiuser OFDM cognitive radio systems, ” in Proceedings of the 2nd International Conference on Communications and Networking in China (ChinaCom ’07), pp 115–119, Shanghai, China, August 2007 ... Networking Resource Allocation with Partial Csi Note that the joint subcarrier, bit, and power allocation problem in (10)–(17) belongs to the mixed integer nonlinear programming (MINP) class [23] ... in Section and the main ﬁndings are summarized in Section System Model We consider the problem of allocating resources on the downlink of an MU-OFDM CR system with one base station (BS) serving...

OFDMA based resource allocation for wireless communication systems

... Fig.1.2 with interleaved subcarrier allocation for the two users 1.4 Motivations in OFDMA- based resource allocation The main allocation issue in OFDMA- based resource allocation is to jointly optimize ... algorithms for OFDMA- based resource allocation in systems such as Single Input Single Output (SISO) - OFDMA, Multiple Input Multiple Output (MIMO) - OFDMA, OFDMA relaying and OFDMA- based Cognitive ... c 2010 BIN DA All Rights Reserved OFDMA- BASED RESOURCE ALLOCATION FOR WIRELESS COMMUNICATION SYSTEMS BIN DA (B.Eng, HHU) A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILOSOPHY DEPARTMENT...

Resource allocation in cellular CDMA systems with cross layer optimization

... studies resource allocation in cellular CDMA systems with cross- layer optimization across the physical layer, the link layer and the network layer The analyses for the network layer and the link layer ... layer, the link layer and the network layer is investigated The cross- layer model is shown in Fig 1.4 with involving the physical layer, the link layer and the network layer In the physical layer, ... certainly produce a system utilization gain as compared to that in the segregated -layer design In the thesis, resource allocation in cellular CDMA systems with cross- layer optimization across...

báo cáo hóa học: " Cross-layer design for radio resource allocation based on priority scheduling in OFDMA wireless access network" docx

... Chen et al.: Cross-layer design for radio resource allocation based on priority scheduling in OFDMA wireless access network EURASIP Journal on Wireless Communications and Networking 2011 2011:28 ... fair scheduling in OFDMA based broadband wireless access systems IEEE Trans Broadcast 49(4), 362–370 (2003) 10 WS Jeon, DG Jeong, Combined connection admission control and packet transmission scheduling ... arranging one traffic burst for the session under scheduling would increase One way to increase the number of subchannels for allocation is to decrease the modulation level For example, in accordance...

Báo cáo hóa học: " Research Article Practical Approaches to Adaptive Resource Allocation in OFDM Systems" docx

... implementation of adaptive resource allocation in OFDMA is a disjoint subcarrier, power, and bit allocation Herein, we further simplify the optimization problem and restrict adaptive resource allocation ... potential for increasing the multiuser diversity in multiple access has resulted in an extension of the algorithm to OFDMA [24] A low-complexity implementation of the OSSA in OFDMA includes initial ... descending order in (15) Then the following lemma is valid Lemma For an OFDMA system with equal users’ bitrates operating in a Rayleigh channel, the initial subcarrier allocation according to Algorithm...

Báo cáo hóa học: " Research Article Other-Cell Interference Reducing Resource Allocation in OFDM-Based Asynchronous Cellular Systems" doc

... system model in consideration In Section 3, the proposed OCI reducing scheme is described Then, the proposed resource allocation methods are applied to OFDM-based cellular systems in Section The ... using orthogonal spreading codes The use of spreading codes can reduce the ﬂuctuation of channel and/or interference, yielding a diversity gain 4.2.1 Optimum WH code allocation Real-valued binary ... be obtained by Pxn = E xn = ASn , (A.4) where CONCLUSIONS We have proposed novel resource allocation schemes that can reduce the OCI in OFDM-based asynchronous cellular systems by reducing the...

Báo cáo hóa học: " Editorial Radio Resource Management in 3G+ Systems Alagan Anpalagan,1 Rath Vannithamby,2 Weihua " potx

... special issue a reality Alagan Anpalagan Rath Vannithamby Weihua Zhuang Sonia A¨ssa ı Alagan Anpalagan received the B.A.S., M.A.S., and Ph.D degrees in electrical engineering from the University ... research interests are in the area of radio resource management techniques and MAC and signaling layer protocols for high-speed wireless-access networks using OFDMA/CDMA technologies including 3G ... analysis; and in particular QoS-aware radio resource management, joint study of wireless physical/link layer characteristics, cross-layer resource optimization, and wireless sensor networking Prior...

báo cáo hóa học: " On the Lambert-W function for constrained resource allocation in cooperative networks" docx

... to find the optimal set of lk and μ The Lambert-W function for CDIT-based power allocation in relay networks In this section, we show how the Lambert-W Function can be used for constrained resource ... closed-form solution for resource allocation problems in wireless mesh and relay networks constitutes the principal contribution of this article The Lambert-W function for subcarrier allocation in ... resource allocation in closedform Using the Lambert-W function, resource allocation can quickly be determined since a number of popular mathematical softwares, including Maple and Matlab, contain the...

Báo cáo hóa học: " Particle swarm optimization for pilot tones design in MIMO-OFDM systems" pot

... subcarrier is increased Because increasing number of subcarrier also increase the number of pilot tones in MIMO-OFDM systems Conclusion In this article, we have proposed particle swarm optimization ... Cite this article as: Seyman and Taşpinar: Particle swarm optimization for pilot tones design in MIMO-OFDM systems EURASIP Journal on Advances in Signal Processing 2011 2011:10 Submit your manuscript ... of particle swarm optimization that has been used for the optimization of location and (or) power of pilot tones are given as follows: swarm size = 20 for 128 subcarriers and swarm size = 10 for...

Quality of Service and Resource Allocation in WiMAXFig Part 1 pdf

... QPSK 1/ 2 5.82 5.65 5.33 4.80 QPSK 3/4 8.73 8.47 8.00 7.20 16 -QAM 1/ 2 11 .64 11 .29 10 .67 9.60 16 -QAM 3/4 64-QAM 2/3 64-QAM 3/4 17 .45 16 .94 16 .00 14 .40 23.27 22.59 21. 33 19 .20 26 .18 25. 41 24.00 21. 60 ... orders@intechweb.org Quality of Service and Resource Allocation in WiMAX, Edited by Roberto C Hincapie and Javier E Sierra p cm 978-953-307-956 -1 Contents Preface IX Part Scheduling and Resource Allocation ... Quality of Service and Resource Allocation in WiMAX Edited by Roberto C Hincapie and Javier E Sierra Published by InTech Janeza Trdine 9, 510 00 Rijeka, Croatia Copyright © 2 012 InTech...

Quality of Service and Resource Allocation in WiMAXFig Part 5 pdf

... WiMAX physical layer standard OFDM_BPSK_1_2 in our simulations [24] 100 Quality of Service and Resource Allocation in WiMAX UGS 350 0 3000 Throughput 250 0 2000 150 0 1000 50 0 300 800 1400 1900 2400 ... for the remaining users under high SINR assumption 114 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH 10 3) Power minimization with individual rate constraints Now assume ... according to a particular algorithm, i.e., 97 Scheduling Algorithm and Bandwidth Allocation in WiMAX fixed allocation for UGS, EDF for rtVR, WFQ for nrtVR, and equal division of remaining bandwidth...

Quality of Service and Resource Allocation in WiMAXFig Part 6 pot

... pseudorandomly, thereby resulting in interference averaging as explained in Byeong Gi Lee & Sunghyun Choi (2008) 118 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH ... Fundamentals of resource allocation in wireless c networks: Theory and algorithms, Springer Thanabalasingham, T., Hanly, S V., Andrew, L L H & Papandriopoulos, J (20 06) Joint allocation of subcarriers and ... in a single RAT scenario Most of the research effort is thus on the vertical handovers management, in order to optimize the resource usage, maintaining an adequate quality- of- service and acting...

Quality of Service and Resource Allocation in WiMAXFig Part 7 doc

... left to the choice of the provider State of the art 3.1 Bandwidth sharing strategies: background To maintain a quality of service required by the constraining and restricting services, there are ... to C and types of service class (class and 2) If class (i.e aggreagted calls) uses I units then 154 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH the remained bandwidth ... 142 14 Quality of Service and Resource Allocation in WiMAX Will-be-set-by -IN- TECH autonomous RAT switching strategy and the assisted RAT switching strategy and we extend the investigation...

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