Power and Subcarrier Allocation for Physical-Layer Security in OFDMA-Based Broadband Wireless Networks
نویسندگان
چکیده
منابع مشابه
Thesis for Master’s Degree QoS Aware Subcarrier and Power Allocation in OFDMA Systems for Broadband Wireless Applications
Wireless broadband technologies are anticipated to flourish in the next few years, due to the increasing demand for wireless connectivity and the need to support enhanced services and applications in local or wide area environments. The primary goal in a communications system is Quality of Service (QoS) provisioning, which is synonymous to achieving an acceptable data transmission rate, signal-...
متن کاملA Comparison between Different Meta-Heuristic Techniques in Power Allocation for Physical Layer Security
Node cooperation can protect wireless networks from eavesdropping by using the physical characteristics of wireless channels rather than cryptographic methods. Allocating the proper amount of power to cooperative nodes is a challenging task. In this paper, we use three cooperative nodes, one as relay to increase throughput at the destination and two friendly jammers to degrade eavesdropper&rsqu...
متن کاملPower and Subcarrier Allocation Scheme for Uplink OFDMA
In this contribution, we propose a power and subcarrier allocation scheme for uplink orthogonal frequency division multiple access (OFDMA) based on the capacity difference between different users. The scheme works iteratively and performs three major tasks. In the first step, the subcarrier with largest capacity difference of two active users is found. Then, the subcarrier selection of these tw...
متن کاملResource Allocation Algorithm with Dynamic Subcarrier Assignment in OFDMA-based Wireless Networks
The allocation of available resources is one of the main issues in multi-user systems. Dependence of system capacity on radio link quality is an additional obstacle of efficient resource allocation in wireless networks. Combinations of two opposite approaches – fair resource allocation and system capacity maximization are used to solve this problem in practice. This paper proposes a resource al...
متن کاملEfficient Subcarrier and Power Allocation Algorithm in OFDMA Uplink System
This letter focuses on uplink transmission in OFDMA systems. A subcarrier and power allocation problem is formulated that maximizes the throughput of OFDMA uplink systems while satisfying each user’s power constraints. A greedy algorithm known to be the most efficient algorithm for this problem can provide a high quality near-optimal solution, but has the disadvantage of incurring a long comput...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Information Forensics and Security
سال: 2011
ISSN: 1556-6013,1556-6021
DOI: 10.1109/tifs.2011.2159206