频谱聚合技术在OFDM系统中的研究和实现

Research and Realization of Spectrum Aggregation Technology in OFDM System

正交频分复用技术能够抵抗多径衰落和符号间干扰,但是其数据传输速率在有限的频谱资源下会受到影响。频谱聚合通过将离散或者间断连续的多个小频段扩展成更宽的频段来提高数据传输率。理论研究证明将频谱聚合技术应用在OFDM系统上可以提高频谱容量,文中介绍了OFDM和频谱聚合的原理,以及基于QPSK链路的系统各个模块的设计和实现,MATLAB仿真结果表明结合频谱聚合技术和OFDM技术的通信系统能够提高数据的传输速率和正确率。

Orthogonal frequency division multiplexing （OFDM） technology could effectively resist the mul- tipath fading and inter-symbol interference, but its message transmission rate is affected by limited spec- trum resource. Spectrum aggregation technology could raise message transmission rate by extending discrete bands or multiple continuous bands into a wider band. The theory indicates that the spectrum aggregation technology applied in OFDM technology could improve the system capacity. Thus, this paper gives the principles of OFDM technology and spectrum aggregation technology and proposes the design and realization of various modules based on QPSK periodic line. MATLAB simulation results indicate that the pro- posed communication system combined with spectrum aggregation technology and OFDM technology could improve the data transfer rate and the accuracy.