Filtered-OFDM系统的次优接收机设计与验证

[摘要] 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。

[关键词] 滤波器；OFDM；接收机；软件无线电

[Abstract] 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.

[Keywords] filter; OFDM; receiver; software defined radio