We present linear transceiver design strategies for large-scale multiple-input multiple-output downlink systems when the user nodes have multiple receive antennas, and they receive multiple streams. First, we propose a matched-filtering-based optimal power allocation method using the sum-rate maximization criterion and utilizing the favorable propagation property of large-scale antenna systems....

In this paper, we evaluate the performance of multicast OFDM systems with single and multiple transmit antennas. We have shown that it is possible to increase the data rate of multicast OFDM systems by selecting the users with good channel for each subcarrier. For the single transmit antenna case, the resource allocation has been applied using the two-step algorithm where subcarrier allocation ...

Bitand power allocation techniques for Multiple-Input Multiple-Output (MIMO) systems are investigated for minimizing the overall bit-error rate (BER) at a fixed data rate. In this work optimal power allocation (PA) technique based on the Lagrange multiplier method is studied and compared with suboptimal solutions. Our results obtained by computer simulations show that power allocation works ver...

Cross-layer design approaches are critical to efficiently utilize radio resources. Resource allocation decision is made by assuming a single user. Multiple access scheme used is an Orthogonal Frequency Division Multiple Access (OFDM). With the goal of choosing best error detection technique, various techniques are compared. A resource allocation algorithm is required to efficiently allocate pow...

Hubs are facilities to collect arrange and distribute commodities in telecommunication networks, cargo delivery systems, etc. In this paper, an uncapacitated phub center problem in case of single allocation and also multiple allocation will be introduced in which travel times or transportation costs are considered as fuzzy parameters. Then, by proposing new methods, the presented problem is con...

A new guideline for proper allocation of multipoles in the multiple multipole method (MMP) is proposed. In an ‘a posteriori’ approach, subspace fitting (SSF) is used to find the best location of multipole expansions for the two dimensional dielectric scattering problem. It is shown that the best location of multipole expansions (regarding their global approximating power) coincides with the med...

Increasing the short circuit current due to the penetration of distributed generations (DGs) in various voltage levels and meshed topology is a basic problem in power systems. Using fault current limiter (FCL) is an efficient approach to mitigate the exceeded short circuit levels. In this paper, a new approach is presented for multiple FCLs locating to decrease short circuit levels in meshed ne...

In this paper, we explore a new resource called multi-target diversity to optimize the performance of multiple input multiple output (MIMO) radar with widely separated antennas for detecting multiple targets. In particular, we allocate antennas of the MIMO radar to probe different targets simultaneously in a flexible manner based on the performance metric of relative entropy. Two antenna alloca...

The pDSL technology is used for providing multiple, high-speed broadband links over power lines in the indoor environment. This work addresses the problem of bandwidth allocation between the various links of a pDSL network and proposes an algorithm for determining the allocation of the various subchannels during network activation and periodically during the normal network operation. The paper ...

This paper considers the problem of power allocation between the two senders in the multiple access channel. Two power allocation criteria are developed. In particular, in the first criterion, the total available power is allocated between the two users such that the two users have the same achievable rate. In addition, the second criterion allocates the total available power such that the sum ...