【摘要】 高峰均比已成为SFBCMIMO-OFDM系统推向实用的主要障碍。针对此问题,提出了一种SFBCMIMO-OFDM系统峰均比抑制的新方法,多相旋转交换PIP(polyphase inversion and permutation)方法。该方法将所有发射天线看作一个整体,通过对序列进行2次分割、旋转、交换,既充分利用了各天线子载波之间的共轭和圆周移位特性,又可以结合FFT的运算特性,最大程度上降低了算法复杂度。仿真结果证明了该方法的有效性。更多还原

【Abstract】 The high PAPR is the major drawback of SFBC MIMO-OFDM systems to its practicability. To deal with this problem, a novel method was proposed to reduce the PAPR of SFBC MIMO-OFDM systems. It was called PIP(polyphase inversion and permutation) method. The method treated all transmit antennas as a whole. By dividing, rotating, and shifting the sequence twice, the method fully made use of the character of conjugation and shifting of all the antennas’ sub-carriers. Meanwhile, PIP method could reduce the complexity of calculation by using the character of IFFT. The simulation result proves the method to be efficient.更多还原