DocumentCode :
729589
Title :
A novel transmission scheme employing virtual subcarrier in TDS-OFDM system
Author :
Shuai Zhang ; Chao Zhang ; Changyong Pan
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
fYear :
2015
fDate :
17-19 June 2015
Firstpage :
1
Lastpage :
3
Abstract :
The Chinese digital terrestrial/television multimedia broadcasting (DTMB) standard adopts time-domain synchronous orthogonal frequency division multiplexing (TDS-OFDM) as the modulation technology. TDS-OFDM system uses time domain PN sequences as frame header and thus has to employ square root raised cosine (SRRC) filters to perform spectrum shaping. In order to ensure synchronization performance, the system needs oversampling and symbol timing recovery (STR), which is sensitive to sampling position offset and increases the implementation complexity. In this paper, a novel transmission scheme utilizing virtual subcarrier is proposed to mitigate this problem. The proposed system does not require oversampling and SRRC filters. Compared with the conventional TDS-OFDM system, simulation results prove that the proposed scheme has better performance in presence of sampling position offset in various multipath channels.
Keywords :
OFDM modulation; digital multimedia broadcasting; filtering theory; multipath channels; time-domain analysis; Chinese digital terrestrial-television multimedia broadcasting; DTMB standard; SRRC filters; TDS-OFDM system; frame header; modulation technology; multipath channels; sampling position offset; spectrum shaping; square root raised cosine filters; symbol timing recovery; synchronization performance; time domain PN sequences; time-domain synchronous orthogonal frequency division multiplexing; transmission scheme; virtual subcarrier; Broadcasting; Discrete Fourier transforms; Frequency-domain analysis; Multimedia communication; OFDM; Synchronization; Time-domain analysis; Next generation of Broadcasting system; Signal processing for transmission; TDS-OFDM; Virtual subcarrier;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Broadband Multimedia Systems and Broadcasting (BMSB), 2015 IEEE International Symposium on
Conference_Location :
Ghent
Type :
conf
DOI :
10.1109/BMSB.2015.7177232
Filename :
7177232
Link To Document :
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