Title :
Power efficiency improvement by PAPR reduction and predistorter in MIMO-OFDM system
Author :
Ngo Thi Thu Trang ; Taeyoung, Trang ; Kim, Han Nam
Author_Institution :
Dept. of Inf. & Comput. Eng., Chungbuk Nat. Univ., Cheongju
Abstract :
This paper analyzes the performance of selected mapping and partial transmit sequences in the multiinput multioutput orthogonal frequency division multiplexing (MIMO-OFDM) system using a space-time block code. The phase rotation vector, which is transmitted as side information, is considered. Simulation results show that the PAPR is decreased about 5 dB in the PTS, and about 3.5 dB in SLM, compared with the original MIMO-OFDM system, when QPSK is used. In order to conform to the linear amplifier, the input back off (IBO) of 4 dB is required for the PTS, and the IBO of 6 dB for the SLM due to the predistorter. Without the SLM or the PTS, the IBO of about 8 dB is needed
Keywords :
MIMO systems; OFDM modulation; block codes; error statistics; mobile communication; space-time codes; broadband wireless communication; multiinput multioutput system; orthogonal frequency division multiplexing; peak-to-average power ratio; phase rotation vector; predistorter; space-time block code; Bit error rate; Block codes; Degradation; Nonlinear distortion; OFDM; Partial transmit sequences; Peak to average power ratio; Power engineering and energy; Power engineering computing; Quadrature phase shift keying;
Conference_Titel :
Advanced Communication Technology, 2005, ICACT 2005. The 7th International Conference on
Conference_Location :
Phoenix Park
DOI :
10.1109/ICACT.2005.246228
