F-OFDM系统的基带技术研究

Research on Baseband Technology of Filtered-OFDM Wireless Communication

在对传统LTE-OFDM深入研究的基础上,针对滤波OFDM(F-OFDM)技术特点,设计了数据帧格式,建立F-OFDM基带系统模型,通过对2个子带进行滤波处理,实现了各个子带波形的解耦,并仿真验证其性能。仿真结果表明:在AWGN信道下,F-OFDM系统的下行基带信号的带外衰减超过60 d B,较LTE-OFDM高28 d B,F-OFDM与LTE-OFDM的BER接近一致,与理论值的差异小于1 d B。相比LTE-OFDM系统,F-OFDM系统在保证误码率性能的前提下,大大改善了带外频谱泄漏,并进一步提高了频谱效率。

Based on the deeply research of traditional LTE-OFDM,we designed the system of FilterOFDM（ F-OFDM） with its characteristics,which defined the format of frame,and simulated the baseband system model,and filtered the two sub-band signal and de-couples the baseband signal and verified its performance. The experimental results show that： the out-band attenuation of DL baseband F-OFDM signal can reach 60 d B,which improves 28 d B over LTE-OFDM,and the BER of F-OFDM system is also similar to LTE-OFDM,which has less 1 d B than theoretical value. Compared with LTE-OFDM system,F-OFDM system improves OOB leakage,and increases the spectrum efficiency,which also improves BER performance of LTE-OFDM system.