无线协作多播系统中基于中断概率的资源优化算法

发布时间：2018-05-30 14:36

本文选题：多播 + 协作分集　；参考：《四川大学学报(工程科学版)》2014年06期

【摘要】：针对OFDMA的无线协作多播系统中,由于信道瞬时衰落的影响,不能保证所有多播数据成功传输的问题,从优化系统频域和功率的资源出发,提出在最小化多播传输中断概率时的联合子载波和功率分配优化算法。在子载波分配阶段采用比例协作子载波分配算法,实现吞吐量和公平性的折中。在功率分配阶段采用迭代功率分配算法,有效地利用了有限的功率。仿真结果表明:提出的协作算法的中断概率明显小于传统非协作算法的中断概率;在协作算法中有功率分配算法的中断概率小于没有功率分配算法的中断概率。提出的资源优化算法能很好地克服信道瞬时衰落的影响,保证多播数据的成功传输。
[Abstract]:In the wireless cooperative multicast system of OFDMA, due to the influence of channel instantaneous fading, all multicast data can not be transmitted successfully. In order to optimize the system frequency domain and power resources, A joint subcarrier and power allocation optimization algorithm is proposed to minimize the outage probability of multicast transmission. In the phase of subcarrier allocation, a proportional cooperative subcarrier allocation algorithm is used to achieve the tradeoff between throughput and fairness. In the phase of power allocation, iterative power allocation algorithm is used to utilize the limited power effectively. The simulation results show that the outage probability of the proposed algorithm is obviously smaller than that of the traditional uncooperative algorithm, and the outage probability of the power allocation algorithm is less than that of the non-power allocation algorithm. The proposed resource optimization algorithm can overcome the influence of channel transient fading and ensure the successful transmission of multicast data.
【作者单位】：大连理工大学信息与通信工程学院;中国刑事警察学院公安情报系;
【基金】：国家自然科学基金资助项目(61172058) 高等学校博士学科点专项科研基金资助项目(20120041110011)
【分类号】：TN929.5

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