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


Vol. 31,  No. 7, pp. 713-724, Jul.  2006


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  Abstract

The purpose of this study is to design, implement and verify the pre-modulation filter with the variable -3㏈ 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.

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  Cite this article

[IEEE Style]

S. Lee and S. Ra, "Implementation and Verification of Linear Phase filter with Variable Cutoff Frequency for PCM/FM transmission," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 7, pp. 713-724, 2006. DOI: .

[ACM Style]

Sang-Rae Lee and Sung-Woong Ra. 2006. Implementation and Verification of Linear Phase filter with Variable Cutoff Frequency for PCM/FM transmission. The Journal of Korean Institute of Communications and Information Sciences, 31, 7, (2006), 713-724. DOI: .

[KICS Style]

Sang-Rae Lee and Sung-Woong Ra, "Implementation and Verification of Linear Phase filter with Variable Cutoff Frequency for PCM/FM transmission," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 7, pp. 713-724, 7. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880