Title :
A PTS-OFDM Phase-Superimposed over Pilot Symbols
Author :
Han, Tae-Young ; Kim, Nam ; Choi, Jung-Hun ; Lee, Jae-Hwan
Author_Institution :
Dept. of Inf. & Comput. Eng., Chungbuk Nat. Univ., Cheongju
Abstract :
This paper presents a technique to estimate the side information superimposed over the pilot and data symbols in an orthogonal frequency division multiplexing system using the partial transmit sequences (PTS-OFDM) in order to reduce the peak-to-average power ratio. The phases of the rotation vector are added to those of the pilot symbols and those of the data symbols by interlaying them between any two pilot symbols. The receiver restores the data symbols by utilizing the channel estimation of the pilot symbols. Therefore, the bandwidth efficiency is improved by not using the subcarriers that are assigned for the reduction of the PAPR. Also, the enormous increase of the bit error rate which would be caused by incorrectly receiving the side information, i.e. the phases of the rotation vector, is prevented. The simulation results of the bit error rate performance for the BPSK are given using the COST-207 channel model.
Keywords :
OFDM modulation; channel estimation; error statistics; COST-207 channel model; bandwidth efficiency; bit error rate; channel estimation; data symbols; orthogonal frequency division multiplexing system; partial transmit sequences; peak-to-average power ratio; pilot symbols; rotation vector; side information; AWGN; Baseband; Bit error rate; Channel estimation; Frequency estimation; Information technology; OFDM; Partial transmit sequences; Peak to average power ratio; Research and development; Channel Estimation; OFDM; PAPR; PTS;
Conference_Titel :
Advanced Communication Technology, 2008. ICACT 2008. 10th International Conference on
Conference_Location :
Gangwon-Do
Print_ISBN :
978-89-5519-136-3
DOI :
10.1109/ICACT.2008.4493941
