Filtered-OFDM系统的次优接收机设计与验证

Design and Verification of Sub-Optimum Receiver for Filtered-OFDM System

提出了一种针对基于子带滤波的正交频分复用(f-OFDM)系统的次优接收机算法。针对限幅滤波的滤波多载波信号,提出充分利用失真信号部分的方法,通过减少欧氏距离的方式最小化失真的影响,在保证系统复杂度的同时提升了系统的性能。同时,通过软件无线电搭建了原型验证平台,对滤波多载波的非线性接收机处理算法进行了验证。计算机仿真及验证结果表明:新的算法使得误码率(BER)性能得到了提升。

In this paper, a sub-optimum receiver for filtered-orthogonal frequency division multiplexing(f-OFDM) system is proposed. The new receiver will make full use of the nonlinear distortion of filtered-OFDM signals, improving system performance by reducing the Euclidean distance between received signals and decoded signals, while the system complexity won't increase a lot. A experimental platform by software defined radio to verify the validity of new algorithm is also set up. The results show that the new algorithm improve bit error rate(BER)performance greatly.