现代电子技术Issue(2)：1-4,4.
基于SFBC MIMO-OFDM系统的峰均比抑制算法
PAPR restraint algorithm based on SFBC MIMO-OFDM system
摘要
Abstract
Compared with STBC MIO⁃OFDM system,SFBC MIMO⁃OFDM system which is adopted by TD⁃LTE system has better ability to resist damages of multipath time⁃varying fading channel. Because of the fact that peak⁃to⁃average power ratio (PAPR)of SFBC MIMO⁃OFDM system is too high,an algorithm of space⁃frequency transformation between sub⁃blocks with low complexity is proposed. In the frequency domain , equal partitioning into sub⁃blocks generated from space⁃frequency block coding (SFBC) sequence of each antenna is conducted. For generation of candidate sequences,inversion cross of the corre⁃sponding sub⁃blocks between antennas are performed and PAPR minimal sequence is selected from candidate sequences. In the time domain,successive cyclic shifting of sub⁃blocks in each antenna are executed synchronously to do further selection of opti⁃mal PAPR sequence for transmission. With analysis on the characteristics of IFFT and SFBC,the complexity of PAPR algorithm can be further reduced. The simulation results prove that the scheme is valid and reliable in the premise of ensuring the orthogo⁃nality of SFBC.关键词
正交频分复用/多输入/多输出/空频分块码/峰均功率比/空间自由度Key words
orthogonal frequency division multiplexing/multi-input multi-output orthogonal/space-frequency block coding/peak-to-average power ratio/spacial freedom分类
信息技术与安全科学引用本文复制引用
张博,李辉,程伟..基于SFBC MIMO-OFDM系统的峰均比抑制算法[J].现代电子技术,2015,(2):1-4,4.基金项目
国家自然科学基金（61171155）；陕西省自然科学基金 （）
