摘要
介绍了一种降低OFDMA系统峰均功率比的设计方法及其实现,给出了该设计的总体结构,并采用FPGA器件实现。此设计采用预留子载波的方法来实现峰均功率比的降低。OFDMA系统首先将OFDMA符号经过基带的相关处理后,然后完成IFFT计算,降低峰均功率比功能,最后再把该符号发送给外围设备接收。另外,在整个设计实现过程中,为使得削峰处理更具有灵活性,添加了判断是否削峰的单元。
A method how to reduce the Peak-to-Average Power Ratio of OFDMA and the structure of this equipment based on FPGA are presented. The equipment used TR method to reduce PAPR. In OFDMA, the symbol would be deal with a series of processions on base band firstly, and then it would be send to this equipment to do IFFT and reduce PAPR, at last, this symbol would be send out to peripheral equipment. By the way, the equipment has added the judged unit so that the procession of reducing PAPR would be more flexible.
出处
《科学技术与工程》
2008年第8期2007-2010,2021,共5页
Science Technology and Engineering
