【作者】 罗俊平； 罗新民； 冯冀；

【Author】 Luo Junping Luo Xinmin Feng Ji (School of Electronic and Information Engineering Xi’an Jiaotong University 710049)

【机构】 西安交通大学电子与信息工程学院；

【摘要】 OFDM技术具有频谱利用率高,抗多径干扰能力强的优点。但是高峰均功率比(PAPR)特性是OFDM实用化的一个瓶颈。传统的限幅方法降低了PAPR却增大了误码率和带外泄漏功率。本文提出了一种改进的限幅算法,该算法通过修正限幅后的信号误差及使用功率掩膜来兼顾系统误码性能和带外泄漏功率。理论分析和仿真结果表明,改进的限幅算法在降低PAPR的同时,减小了系统误码率和带外泄漏功率。更多还原

【Abstract】 Orthogonal frequency division multiplexing (OFDM) has a lot of advantages, such as High bandwidth efficiency and immunity to multipath fading. However, the high peak-to-average power ratio (PAPR) has become a bottleneck of OFDM realization. The traditional clipping algorithm could reduce PAPR effectively but resulting a higher BER and out-of-band leakage power. To resolve the problem, an improved clipping algorithm is presented to reduce the PAPR of OFDM signal. Contrast to the traditional clipping algorithm, the improved clipping algorithm has a better BER performance and out-of-band power leakiness performance.更多还原