摘要
结合新型双向多跳网络协议和正交频分复用技术,研究旨在保证通信质量情况下的自适应比特和功率分配算法,其目的是以较小发送功率和较高频谱效率完成通信。通过凸优化理论推导出最优功率分配算法,并提出一种基于贪婪原则的自适应比特分配算法,能够以较低的复杂度在实际工程中完成部署。仿真分析表明,提出的双向多跳算法是传统多跳协议频谱效率的2倍,所需发送功率是平均资源分配算法的1/3。
In Orthogonal Frequency Division Multiplexing（OFDM）-based two-way multihop system, the adaptive bit and power allocation with guaranteed quality of service（QoS） is investigated to complete the two-way commu- nication with the lower power consumption and higher spectral efficiency. Based on convex theory, the closed- form formulation of optimal power allocation is derived. Then, a greedy-based bit allocation algorithm is pro- posed, which can be implemented in practical scenario with low complexity. The simulation shows that the pro- posed algorithm has twice spectral efficiency than the traditional muhihop protocol, while the transmit power is 1/3 of average allocation algorithm.
出处
《电讯技术》
北大核心
2013年第3期307-311,共5页
Telecommunication Engineering
