Tree-structured MIMO FIR Filter Banks for Flexible Frequency Reallocation

Emerging digital on-board processors for communication satellites concurrently call for two tasks of a cascade of a frequency demultiplexer (FDMUX) and a frequency multiplexer (FMUX): i) mere de-and remultiplexing of an FDM signal (FDFMUX functionality) and ii) decomposition and reconstruction of a...

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Bibliographic Details
Main Authors: Abdulazim, M.N., Gockler, H.G.
Format: Conference Proceeding
Language:English
Subjects:
Artificial satellites
Bandwidth
Downlink
Filter bank
Finite impulse response filter
Frequency division multiplexing
MIMO
Sampling methods
Signal processing
Wideband
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Summary:Emerging digital on-board processors for communication satellites concurrently call for two tasks of a cascade of a frequency demultiplexer (FDMUX) and a frequency multiplexer (FMUX): i) mere de-and remultiplexing of an FDM signal (FDFMUX functionality) and ii) decomposition and reconstruction of a wideband signal (Sub-band Coding (SBC) functionality). In this paper, two FIR approaches allowing for flexible frequency reallocation, the oversampling 2times2-channel and the critically sampling 2-channel FIR SBC-FDFMUX filter banks, are investigated and compared with each other. Furthermore, tree-structured MIMO extensions of both approaches including the application of switching functions are investigated. The oversampling 2times2-channel SBC-FDFMUX filter bank moderately outperforms the critically sampling 2-channel SBC-FDFMUX filter bank in terms of computational complexity, whereas the latter is highly modular and, hence, simply realisable.
ISSN:1845-5921
DOI:10.1109/ISPA.2007.4383666