摘要
OFDM信号大的峰均功率比以及过零点,通过一些模拟器件后,由于它们的非线性,会使信号严重失真,降低了整个系统的性能,文中提出了一种全新的OFDM信号预失真方法,将幅度和相位预失真结合起来,用以减小峰均功率比和避免信号过零点,在一定的条件下,该方法达到了设计目的,同时对抗干扰能力影响不大。
High PARA and zero-crossing would let the OFDM signal distort heavily when passing some analogous modules due to their nonlinearity,thus reduce the performance of the whole system. This paper proposes a new approach to pre-distort OFDM on magnitude and phase for reducing PARA and avoiding zero-crossing. Simulations indicate that under some conditions,it’s viable and has little influence on the error performance.
出处
《通信技术》
2007年第10期9-11,共3页
Communications Technology
