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Performance Comparison of Channelization Schemes for Flexible Satellite Transponder with Digital Filter Banks  

Lee, Dong-Hun (Gwangju Institute of Science and Technology)
Kim, Ki-Seon (Gwangju Institute of Science and Technology)
Publication Information
Journal of the Korea Institute of Military Science and Technology / v.13, no.3, 2010 , pp. 405-412 More about this Journal
Abstract
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.
Keywords
Satellite Transponder; Channelization; Complexity; Flexibility;
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