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ThinkMind // CTRQ 2012, The Fifth International Conference on Communication Theory, Reliability, and Quality of Service // View article ctrq_2012_3_10_10024
Software Digital-Down-Converter Design and Optimization for DVB-T Systems
 Authors: Shu-Ming Tseng Jian-Cheng Yu Zheng-Hau Lin Keywords: DVB-T; DDC; Decimate; Real-time. Abstract: In this paper, a novel Digital-Down-Converter (DDC) architecture for PC-based software Digital Video Broadcasting-Terrestrial (DVB-T) receiver is proposed. The sampling rate of A/D is 192/7 MHz and the order of the lowpass FIR filter is seven (8 coefficients) in DDC. Furthermore, the Combining of the Mixer and Filter (CMF) is also proposed, including the pre-processing of mixer and filter coefficients and storing the results in a look-up table. If the input data of length is N, the proposed CMF scheme has 2N multiplications, while the previous architecture, which does not pre-process the mixer and filter coefficient together in advance, has 3N multiplications. Finally, the algorithms also are optimized in assembly code to satisfy DVB-T real-time reception requirement. Pages: 57 to 61 Copyright: Copyright (c) IARIA, 2012 Publication date: April 29, 2012 Published in: conference ISSN: 2308-4022 ISBN: 978-1-61208-192-2 Location: Chamonix, France Dates: from April 29, 2012 to May 4, 2012
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