OFDM双向多跳网络的新型比特和功率分配算法

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。

A novel bit and power allocation algorithm for OFDM-based two-way multihop network

In Orthogonal Frequency Division Multiplexing(OFDM) based two way mul tihop system, the adaptive bit and power allocation with guaranteed quality of s ervice(QoS) is investigated to complete the two way communication with the lower power consumption and higher spectral efficiency. Based on convex theo ry, the closed form formulation of optimal power allocation is derived. Then, a greedy based bit allocation algorithm is proposed, which can be implemented in practical scenario with low complexity. The simulation shows that the proposed a lgorithm has twice spectral efficiency than the traditional multihop protocol, w hile the transmit power is 1/3 of average allocation algorithm.