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Implementation and Verification of Linear Phase filter with Variable Cutoff Frequency for PCM/FM transmission  

Lee Sang-Rae (한국항공우주연구원 우주발사체기술실 전자그룹)
Ra Sung-Woong (충남대학교 전자공학과 영상통신연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.7C, 2006 , pp. 713-724 More about this Journal
Abstract
The purpose of this study is to design, implement and verify the pre-modulation filter with the variable -3dB cutoff frequency and linear phase response for bandlimiting the allocation of radio frequency bandwidth for PCM/FM transmission. For the design of this required filter, the digital FIR filter, DAC system and tuneable 2nd order LPF have been constructed and simulated according to the attenuation characteristic requirement of the amplitude frequency response by each stage. From these results, we have implemented the filter and verified the analog conversion hardware part which is composed of DAC system and tuneable 2nd order LPF for the interpolation of the discrete sequences. Especially this paper proposes and carries out the verification processes using the tone generator and the calibration procedures for more precise frequency response of the filter.
Keywords
FIR; DAC; LPF; verification; calibration;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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