摘要
文中提出了一种简单的方法,用来对正交频分复用(OFDM)系统中载波频率的偏移进行纠正。传统用来纠正载波频偏的方法都是从时域上进行的,文中推荐的方法是,从时域到频域变换的FFT模块入手,通过改变FFT的旋转因子来完成的。通过文中的方法,不但可以利用前项纠错的方式避免反馈,而且可以缩减复数乘法的次数以降低计算复杂度和系统功耗。仿真结果证实,这种方法对性能还有一些提高。
In this paper, a simple method for carrier offset correction in OFDM system is introduced. The traditional method is carried on time domain, and the method recommended in this paper is to correct the carrier offset by changing the twiddle factor of the FFT. Through this method, we can not only avoid the feedback by using forward error correction, but also reduce the times of complex multiplication in order to reduce the power consumption of the system. The simulation result shows this method could also improve the performance of the system.
出处
《电子测量技术》
2006年第3期148-150,共3页
Electronic Measurement Technology
