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,...

Ngày tải lên: 11/09/2015, 10:15

... propose cooperative protocols for video transmission to better utilize system resources for performance improvement Moreover, because of the broadcast nature of the phase in cooperative transmission, ... video transmission with side information, we have obtained up to dB gain over the amplify-and-forward or decode-and-forward protocols For the multiuser case, we conce...

Ngày tải lên: 21/06/2014, 20:20

... search for λ In other words, after transforming the original optimization problem into the Lagrangian form, we can find an optimal set of configurations for a particular workload in the larger stochastic ... the stochastic allocation problem can also be used to solve the related known-workload problem For a single workload, simply setting napps = and Pr(1) = for the workload maps...

Ngày tải lên: 21/06/2014, 23:20

... 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

... impedance bandwidth The broadband design of dual and circularly polarized antennas demands precise wideband control of individual orthogonal radiated polarizations Dual linear polarization is attained ... operating bandwidth This thesis presents the broadband design of dual and circularly polarized antennas, and the bandwidth definitions are first established 1....

Ngày tải lên: 02/10/2015, 12:56

... behind DS -CDMA, followed by an overview of the existing conventional multiuser detectors The problem of multiuser detection is reformulated as one of pattern recognition, and two multiuser detectors ... Multiple-Access (CDMA) : An Overview 1.4.1 Motivation for CDMA 1.4.2 Basic Synchronous CDMA Model 1.4.3 Basic Asynchronous CDMA Model 1.5 Limitations of Conventional CDM...

Ngày tải lên: 28/11/2015, 13:33

... with quantized CSI can be formulated under feedback capacity constraints We introduce the outage throughput as the performance measure for the downlink throughput Here, we define the outage throughput ... for downlink OFDMA with finite coherence time, in Proceedings of the IEEE ISIT ‘07, 2751–2755 (2007) I Rubin, Information rates and data-compression schemes for poiss...

Ngày tải lên: 21/06/2014, 01:20

... ITERATIVE RECEIVER DESIGN FOR BROADBAND WIRELESS COMMUNICATION SYSTEMS VIA EXPECTATION MAXIMIZATION (EM) BASED ALGORITHMS THE-HANH PHAM (B Eng., Hanoi ... recommendations for future works Chapter Overview of Expectation Maximization (EM), Expectation Conditional Maximization (ECM) and Space-Alternating Generalized EM (SAGE) Algorithms 2.1 Expectat...

Ngày tải lên: 12/09/2015, 08:19

... Resource Allocation for Asymmetric Multi-Way Relay Communication over Orthogonal Channels Christoph Hausl∗1 , Onurcan ˙scan1 and Francesco Rossetto2 I¸ Institute DLR, for Communications ... optimization of the resource allocation for multi-way relay systems with asymmetric channels Moreover, we information packet ui , the decoder at Ti outputs the ˆ hard estima...

Ngày tải lên: 20/06/2014, 20:20

... Resource Allocation for Asymmetric Multi-Way Relay Communication over Orthogonal Channels Christoph Hausl∗1 , Onurcan ˙scan1 and Francesco Rossetto2 I¸ Institute DLR, for Communications ... optimization of the resource allocation for multi-way relay systems with asymmetric channels Moreover, we information packet ui , the decoder at Ti outputs the ˆ hard estima...

Ngày tải lên: 21/06/2014, 17:20

... where Ps and Pr are the total available power at the source and relay node αi and ζi are the nonnegative power allocation parameters for each orthogonal band at the source and relay node, and m ... bands available from the source and the relay are mutually orthogonal In particular, the situation where, among total k channels, there are m channels available for the...

Ngày tải lên: 21/06/2014, 18:20

... A novel modeling for the joint BS/relay assignment, optimum rate allocation, and routing scheme was proposed and formulated under a single problem for the downlink multihop cellular networks ... ←− xK J ←− (i.e., KJ ←− K ) end Algorithm 1: MMKP algorithm for resource allocation in multihop cellular with more valuable ones Therefore, in ADD phase of the algorithm, each ite...

Ngày tải lên: 21/06/2014, 22:20

... suitable for multimedia services To address this disadvantage, we propose an optimal and fair policy for multimedia resource allocation, which introduces a judicious mixture of competition and cooperation, ... paper, we have presented an optimal and fair coopetition strategy for multiuser multimedia RRA Following contributions and conclusions have been made a...

Ngày tải lên: 21/06/2014, 22:20

... Resource Allocation for Asymmetric Multi-Way Relay Communication over Orthogonal Channels Christoph Hausl∗1 , Onurcan ˙scan1 and Francesco Rossetto2 I¸ Institute DLR, for Communications ... optimization of the resource allocation for multi-way relay systems with asymmetric channels Moreover, we information packet ui , the decoder at Ti outputs the ˆ hard estima...

Ngày tải lên: 21/06/2014, 23:20