상세정보
학술지
Modulation and Pre-Equalization Method to Minimize Time Delay in Equalization Digital On-Channel Repeater
- 발행일
- 200806
- 출처
- IEEE Transactions on Broadcasting, v.54 no.2, pp.249-256
- ISSN
- 0018-9316
- 출판사
- IEEE
- 협약과제
- 08MR3800, 지상파 DTV 분산중계 기술개발, 김흥묵
- 초록
- This paper presents novel modulation and pre-equalization methods to minimize a signal processing time delay in the Equalization Digital On-Channel Repeater (EDOCR) for the ATSC terrestrial digital TV system. The proposed modulation method uses Equi-Ripple (ER) filter for Vestigial Side Bands (VSB) pulse shaping instead of conventional Square Root Raised Cosine (SRRC) filter. And the proposed pre-equalization method calculates pre-equalizer filter coefficients by comparing a baseband signal as a reference signal and a demodulated repeater output signal, and then creates new VSB pulse shaping filter coefficients by the convolution of the ER filter and the pre-equalizer filter coefficients. The new VSB pulse shaping filter minimizes the time delay of EDOCR by adjusting the number of its pre-taps and also compensates the linear distortions due to the use of the ER filter and mask filter. © 2008 IEEE.
- KSP 제안 키워드
- Filter coefficients, Modulation method, Pre-equalizer, Processing time delay, Pulse shaping filter, Reference signal, Root raised cosine(RRC), Signal Processing, baseband signal, digital TV, pre-equalization