| Performance Comparison of Channelization Schemes for Flexible Satellite Transponder with Digital Filter Banks |
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Dong-Hun Lee, Ki-Seon Kim |
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Gwangju Institute of Science and Technology |
| 디지털 필터뱅크 기반 플렉서블 위성중계기를 위한 채널화 기법의 성능비교 연구 |
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이동훈, 김기선 |
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광주과학기술원 |
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| Abstract |
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The purpose of this paper is to compare complexity and to assess flexibility of competing transponder architectures for satellite communication services. For performance comparison, we consider three channelization techniques: digital down converter(DDC) based on the use of the cascaded integrator-comb(CIC) filter, tuneable pipeline frequency transform(T-PFT) based on the tree-structure(TS) and variable oversampled complex-modulated filter banks(OCM-FB) based on the polyphase FFT(P-FFT). The comparison begins by presenting a basic architecture of each channelization method and includes analytical expressions of the number of multiplications as a computational complexity perspective. The analytical results show that DDC with CIC filter requires the heavy computational burden and the perfect flexibility. T-PFT based on the TS provides the almost perfect flexibility with the low complexity over DDC with the CIC filter for a large number of sub-channels. OCM-FB based on the P-FFT shows the high flexibility and the best computational complexity performance compared with other approaches. |
| Key Words:
Satellite Transponder, Channelization, Complexity, Flexibility |
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