降低OFDM系统中PAPR的技术研究

正交频分复用作为一种高速信息传输技术,具有很好的抗干扰能力,但是也存在缺点,如高的峰值平均功率比.目前,为了降低硬件的复杂度和提高传输质量,有一些降低OFDM系统中高PAPR值的方法,其中最近提出的部分传输序列法是一种可以大大改善OFDM系统的PAPR性能,同时保持信号无失真的方法.本文介绍了传统的PTS,以及其存在的不足,并提出了对传统的PTS方法改进的算法.验证结果表明:同传统的PTS方法相比,该方法在传输冗余信息和硬件的实现上有所改进.

Method research on reducing PAPR for OFDM system

The orthogonal frequency division multiplexing uses as a high-speed information transmission technology, with excellent anti-interference capabilities, which also has its own shortcomings, such as high peak-to-average power ratio. In order to reduce hardware complexity and enhance the quality of transmission, there are some methods about reducing the PAPR value of OFDM system. The most recently, a kind of method of PTS is a part of transmission can be significantly improved OFDM system PAPR performance, while maintaining signal without distortion. This paper introduced the traditional PTS and its deficiencies, provided an improved method of a traditional PTS. The certification shows that redundancy in the transmission of information and hardware implementation are improved compared with the traditional method of PTS.