Title :
Spectrum notch techniques for TDS-OFDM system
Author :
Wenbo Ding ; Fang Yang ; Jian Song ; Fei Ren ; Jia Li
Author_Institution :
Res. Inst. of Inf. Technol. & Electron. Eng. Dept., Tsinghua Univ., Beijing, China
Abstract :
In this paper, the spectrum notch technique which combines the time-domain windowing and training sequence (TS) redesigning for the time domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) system is proposed. An improved frame structure with overlapping between adjacent frames for the dual pseudo noise padded (DPNP) TDS-OFDM system is put forward to make the spectral efficiency undiminished. The simulation results show that this method can deepen the notches in the power spectrum density (PSD) compared to the conventional TDS-OFDM system by about 7 to 8 dB without any spectrum efficiency cost, which could be in accordance with the -30dB spectrum notch requirements in the spectral mask defined in HomePlugAV 1.1.
Keywords :
OFDM modulation; time-domain analysis; DPNP TDS-OFDM system; HomePlugAV 1.1; TS redesigning; dual pseudo noise padded TDS-OFDM system; frame structure; power spectrum density; spectral efficiency; spectral mask; spectrum notch technique; time domain synchronous orthogonal frequency division multiplexing system; time-domain windowing; training sequence redesigning; Broadcasting; Discrete Fourier transforms; OFDM; Synchronization; Time-domain analysis; Time-frequency analysis; TDS-OFDM; spectral mask; spectrum notch; time-domain windowing; training sequence (TS) redesigning;
Conference_Titel :
Wireless Communications and Mobile Computing Conference (IWCMC), 2013 9th International
Conference_Location :
Sardinia
Print_ISBN :
978-1-4673-2479-3
DOI :
10.1109/IWCMC.2013.6583676
