降低OFDM传输系统峰平功率比的改进方法

Improved ways to reduced the PAPR of OFDM system

OFDM在抗多径衰落、带宽利用率等方面具有得天独厚的优势.然而由于OFDM信号是多个子载波信号的叠加,因此峰平功率比较高,极大地限制了它的广泛应用.本文首先介绍了两种降低OFDM峰平功率比的方法,然后提出了对这两种方法的改进设想.

OFDM has the excellent ability to overcome multipath delay spread and uses the bandwidth efficiently. But because OFDM signal has N subcarriers added together, it has higher peaktoaverage power (PAPR). This limits the application of OFDM signal remarkably. In this paper, two methods of reducing the PAPR are introduced, and corresponding improved methods are given.