Title :
Rejection of co-channel interference in the TDS-OFDM-based DTTB system
Author :
Liu, Guanghui ; Wang, Zhengning ; Ju, Tailiang ; Wang, Mingzhen
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
For the TDS-OFDM-based DTTB system, the receiver is extremely sensitive to the co-channel interference (CCI) introduced by analogue television (TV) service. Utilizing the line synchronization mechanism of analogue TV signal, the CCI is detected by means of the time-domain autocorrelation of the received signal. In this paper, we present a scheme of notch filtering to reject the CCI in the time domain, which considerably enforces the immunity of the TDS-OFDM receiver to the CCI. And the solution is verified in Chinese DTTB system, and simulation results indicate that the notch filtering improve the robustness against the CCI about 20dB in terms of signal interference ratio (SIR).
Keywords :
OFDM modulation; cochannel interference; digital video broadcasting; interference suppression; notch filters; time-domain analysis; Chinese digital terrestrial television broadcasting standard; TDS-OFDM receiver; TDS-OFDM-based DTTB system; analogue TV signal; analogue television service; cochannel interference rejection; line synchronization mechanism; notch filtering; orthogonal frequency-division multiplexing; signal interference ratio; time domain synchronous OFDM; time-domain autocorrelation; Decoding; Demodulation; Digital video broadcasting; Filtering; OFDM; Receivers; Robustness;
Conference_Titel :
Intelligent Signal Processing and Communication Systems (ISPACS), 2010 International Symposium on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-7369-4
DOI :
10.1109/ISPACS.2010.5704696
