摘要
DF-OFDM技术必将成为现代无线通信的核心技术,但合理的资源分配仍然是必须要解决的问题之一。在移动通信系统抗信道衰落和提高信道容量方面,协作通信是一种很好的解决方案。针对改进型的多中继DF-OFDM系统中子载波匹配的问题,应用了固定子载波匹配和自适应子载波匹配两种方法,后者是以匈牙利算法为基础的。通过仿真比较了这两种方法对系统信道容量性能的影响,结果表明自适应子载波匹配方法更能有效提高信道容量。
DF-OFDM technique will become the core technology of mobile communication,but reasonable power allocation is one of the problems to be solved.Cooperative transmission is an efficient solution to resist wireless channel fading and increase channel capacity in the mobile communication systems.Aiming at improved subcarrier pairing of DF-OFDM multi-relay system,such two methods as fixed subcarrier pairing and adaptive subcarrier pairing are presented,and the latter is based on Hungarian algorithm.Finally,the simulation is performed to compare the effect of these two methods on performance of system channel capacity.The simulation results show that the adaptive subcarrier pairing method can more effectively improve the channel capacity.
出处
《无线电通信技术》
2013年第4期22-24,共3页
Radio Communications Technology
