Chunk-based User Selection and Resource Allocation in Distributed Secure MISO- OFDMA Systems
The user selection and resource allocation problem for the downlink of Orthogonal Frequency Division Multiple Access (OFDMA) wireless systems is investigated.It is assumed that the Base Station (BS) consists of multiple antennas in a distributed Antenna System (DAS),while a single antenna is available to each user.The considered problem is modeled as an optimization problem which takes into account a multiple antenna eavesdropper and artificial noise generation for secure communications.Also,the user selection unit is not the subcarrier,as in conventional OFDMA systems,but a set of subcarriers (chunk).User selection based on chunk,power,secrecy data rate are optimized for security capacity in the proposed suboptimal but efficient algorithm.Simulation and complexity comparison are provided to show the benefits of chunk-based resource allocation to DASs.
User selection distributed antenna system MISO-OFDMA chunks physical-layer security artificial noise
Bo Wu Yong Ding
Zhongzhou University, Zhengzhou, China, 450044;Wuhan University, Wu Han, China, 430072 Zhongzhou University, Zhengzhou, China, 450044
国际会议
沈阳
英文
814-817
2012-07-27（万方平台首次上网日期，不代表论文的发表时间）