Acta Metallurgica Sinica(English letters) ›› 2007, Vol. 14 ›› Issue (4): 41-45.doi: 1005-8885 (2007) 04-0041-05

• Wireless • Previous Articles     Next Articles

Inter-antenna and subblock shifting and inversion for peak- to-average power ratio reduction in MIMO-OFDM systems

WANG Yi; TAO Xiao-feng   

  1. Key Laboratory of Universal Wireless Communications (Beijing University of Posts and Telecommunications) Ministry of Education, Wireless Technology Innovation Institute
  • Received:2007-01-08 Revised:1900-01-01 Online:2007-12-24
  • Contact: WANG Yi


In this article, an inter-antenna inter-subblock shifting and inversion (IASSI) scheme is proposed to reduce the peak-to-average power ratio (PAPR) in multi-input multi- output orthogonal frequency division multiplexing (MIMO- OFDM) systems. It exploits multiple antennas and subblocks to provide additional degrees of freedom to benefit the system. To reduce the implementation complexity of the proposed scheme, two simple suboptimal schemes are further presented based on the minimum current maximum criterion; one adopts sequential search and the other employs random binary grouping. The simulation results exhibit the effectiveness of these proposed schemes.

Key words:

peak-to-average power ratio; inter-antenna and subblock shifting and inversion; sequential search; random binary grouping; multi-input multi-output; orthogonal frequency division multiplexing