Browse > Article

Modulation and Pre-equalization Method to minimize time delay in Equalization Digital On-Channel Repeater  

Park Sung-Ik (Radio & Broadcasting Research Division, ETRI)
Kim Heung-Mook (Radio & Broadcasting Research Division, ETRI)
Seo Jae-Hyun (Radio & Broadcasting Research Division, ETRI)
Eum Ho-Min (Radio & Broadcasting Research Division, ETRI)
Lee Yong-Tae (Radio & Broadcasting Research Division, ETRI)
Lee Jae-Young (Radio & Broadcasting Research Division, ETRI)
Lee Soo-In (Radio & Broadcasting Research Division, ETRI)
Publication Information
Journal of Broadcast Engineering / v.11, no.2, 2006 , pp. 229-241 More about this Journal
Abstract
In this paper we propose and analyze a novel modulation and pre-equalization method to minimize signal processing time delay for the Equalization Digital On-Channel Repeater (EDOCR) in ATSC (Advanced Television Systems Committee) terrestrial digital TV system. The proposed modulation method uses Equi-Ripple (ER) filter coefficients instead of conventional Square Root Raised Cosine (SRRC) after coefficients for VSB (Vestigial Side Bands) pulse shaping. And the proposed pre-equalization method calculates pre-equalizer filter coefficients by using baseband signal as reference signal and demodulated repeater output signal, then generates a new VSB pulse shaping filter coefficients by convolutioning ER filter coefficients and pre-equalizer filter coefficients. The newly generated pulse shaping filter does not have minimized time delay by adjusting the number of pre-taps of the filter, but also compensates linear distortions caused by ER filter and mask filter.
Keywords
ATSC; SFN; EDOCR; Modulator; Pre-equalizer;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 T. W. Parks and J. H. McClellan, 'Chebyshev approximation for nonrecursive digital filters with linear phase,' IEEE Trans. On Circuit Theory, Vol. CT-19, pp. 189-194, 1972
2 박성익, 음호민, 이용태, 김흥묵, 서재현, 김형남, 김승원, 'ATSC 지상파 디지털 TV 방송의 단일 주파수 망 구성을 위한 등화형 디지털 동일 채널 중계기,' 방송공학회논문지, 제9권, 제4호, pp. 371-383, 2004년
3 박성익, 음호민, 이용태, 김흥묵, 서재현, 김형남, 김승원, 'ATSC 지상파 DTV 시스템의 등화형 디지털 동일 채널 중계기를 위한 디지털 신호 처리 기술,' 방송공학회논문지, 제9권, 제4호, pp. 357-370, 2004년
4 T. W. Parks and J. H. McClellan, 'A Program for the Design of Linear Phase Finite Impulse Response Filters,' IEEE Trans. On Audio Electroacoustics, Vol. AU-20, pp. 195-199, 1972
5 S. W. Kim, Y.-T. Lee, S. I. Park, H. M. Eum, J. H. Seo, and H. M. Kim, 'Equalization Digital On-Channel Repeater in Single Frequency Networks,' IEEE Trans. on Broadcasting, Vol. 52, No. 2, June 2006
6 Transmission Measurement and Compliance for Digital Television, Doc. A/64 Rev. A, May, 2000
7 G. A. Clark, S. K. Mitra, and S. R. Parker, 'Block Implementation of Adaptive Digital Filters,' IEEE Trans. On Circuits and Systems, Vol. 28, No. 6, June 1981
8 ATSC Recommended Practice: Design Of Synchronized Multiple Transmitter Networks, Doc. A/111, Sept. 2004
9 H.-N. Kim, S. I. Park, and S. W. Kim, 'Performance Analysis of Error Propagation Effects in the DFE for ATSC DTV Receivers,' IEEE Trans. on Broadcasting, Vol. 49, Sept. 2003