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...

Ngày tải lên: 16/09/2015, 15:53

... set and sends back HCM Terminate (b) Proposed soft handoff procedure Figure 6: Soft handoff algorithm and procedure 4.2 Soft handoff One of the major benefits of a CDMA system is the ability of a ... Spain, September 2004 [7] J Yao, T C Wong, and Y H Chew, Cross-layer design on the reverse and forward links capacities balancing in cellular CDMA systems,” in Proceedings...

Ngày tải lên: 22/06/2014, 22:20

... 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

... 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

... 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

... CDMA systems [14, 15, 18] However, MC -CDMA systems have not been examined in such studies In this paper, the reverse link of an MC -CDMA system with the beamforming technique in the presence of ... , (13) In this section, the outage probability of MC -CDMA systems in the presence of CFO with perfect beamforming is evaluated To start t...

Ngày tải lên: 22/06/2014, 19:20

... subcarrier fading power of other users Thus the BER of an MC-CDMA uplink channel conditioned on MC-CDMA Uplink Performance in Correlated Multipath Channels the set of subcarrier fading amplitudes ... Electronic Engineering (EEE) in Nanyang Technological University, Singapore Her research interests include channel modeling for MCM systems, performance analysis of MC-C...

Ngày tải lên: 23/06/2014, 01:20

... 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

... 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

... structure defined in the IEEE 80 2.16 standard for TDD in PMP mode is shown in Fig Each frame has a duration of Δ and is divided into uplink and downlink subframes At the beginning of a downlink subframe, ... presents the details of Block B of Fig 2, which calculates the mean service time of REQs  182 Quality of Service and Resource Allocation in WiMAX Wil...

Ngày tải lên: 21/06/2014, 05:20

... uplink channel and the UL-MAP contains the physical specifications and also the time allocation of 202 Quality of Service and Resource Allocation in WiMAX resources After the downlink and uplink ... piece of information coded in 16 bits A connection is a unidirectional mapping between a BS and a 198 Quality of Service and Resource Allocation in WiMA...

Ngày tải lên: 21/06/2014, 05:20