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...

Ngày tải lên: 10/09/2015, 15:49

... 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 programm...

Ngày tải lên: 21/06/2014, 11:20

... 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,...

Ngày tải lên: 11/09/2015, 10:15

... 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...

Ngày tải lên: 16/09/2015, 15:53

... 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 ad...

Ngày tải lên: 21/06/2014, 02:20

... 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...

Ngày tải lên: 22/06/2014, 19:20

... 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...

Ngày tải lên: 22/06/2014, 19:20

... 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 technolo...

Ngày tải lên: 22/06/2014, 22:20

... 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 Lam...

Ngày tải lên: 21/06/2014, 02:20

... 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 Proc...

Ngày tải lên: 21/06/2014, 03:20

... 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 ...

Ngày tải lên: 21/06/2014, 05:20

... 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 wi...

Ngày tải lên: 21/06/2014, 05:20

... 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)...

Ngày tải lên: 21/06/2014, 05:20

... 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-se...

Ngày tải lên: 21/06/2014, 05:20