Minimization of PAPR in MIMO-OFDM Systems by Tone Reservation Techniques and Pilot Tones
In this paper a method that mixes tone reservation (TR) techniques and phase information of the pilot tones to efficiently reduce the peak to average power ratio (PAPR) of the multiple input multiple output (MIMO) orthogonal frequency division multiplexing (OFDM) signals is presented. First, we utilize convex optimization techniques to design dummy symbols to unused or reserved set of subcarriers to reduce the PAPR of the transmitted data in an OFDM symbol. Then, to the pilot tones dedicated for channel estimation, we design phase information to further reduce the PAPR. To design phase information of the pilot tones in MIMO-OFDM systems, we resort to the previously proposed cross entropy (CE) optimization techniques used for pilot phase design in single input single output (SISO) OFDM systems. Simulation results show that, by mixing the dummy symbols and pilot phase information the PAPR of the MIMOOFDM signals can be effectively reduced.
Emmanuel MANASSEH Shuichi OHNO Yong JIN
Dept. of Artificial Complex Systems Engineering, Hiroshima University 1-4-1 Higashi-Hiroshima, Japan Dept. of Artificial Complex Systems Engineering, Hiroshima University1-4-1 Higashi-Hiroshima, Japan
国际会议
2011亚太信号与信息处理协会年度峰会(APSIPAASC 2011)
西安
英文
1-4
2011-10-18（万方平台首次上网日期，不代表论文的发表时间）