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학술대회 Efficient Coarse Frequency Synchronizer using Serial Correlator for DVB-S2
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박장웅, 윤형진, 선우명훈, 김판수, 장대익
International Symposium on Circuits and Systems (ISCAS) 2008, pp.1520-1523
08MR2900, 21GHz대역 위성방송 전송기술개발, 장대익
This paper proposes an efficient coarse frequency synchronizer for digital video broadcasting - second generation (DVB-S2). The input signal requirement of acquisition range for coarse frequency estimator in the DVB-S2 is around 짹1.5625Mhz, which corresponds to 6.25% of the symbol rate at 25Mbaud. At the process of analyzing the robust algorithm among data-aided approaches, we find that the Luise & Reggiannini (L&R) algorithm is the most promising one for coarse frequency estimation with respect to estimation performance and complexity. However, it requires many multipliers and adders to compute output values of correlators. We propose an efficient architecture identifying the serial correlator with the buffer and multiplexers. The proposed coarse frequency synchronizer can reduce the hardware complexity about 92% of the direct implementation. The proposed architecture has been implemented and verified on the Xilinx Virtex II FPGA. ©2008 IEEE.
KSP 제안 키워드
DVB-S2, Digital video broadcasting, Frequency Estimation, Hardware complexity, Input signal, Second generation(2G), Xilinx virtex, data-aided, efficient architecture, estimation performance, frequency estimator