Efficient Implementation of a Demultiplexer Based on a Multirate Filter Bank for the Skyplex Satellites DVB System

In this paper, an extensive comparison among alternative algorithms for the implementation of a digital demultiplexer has been carried out. The computational complexity, the performances and the accuracy with respect to the quantization effects (quantization noise and coefficient quantization) have been evaluated for the different algorithms. The selected digital architecture has been designed to be compliant with the Eutelsat specifications for the Skyplex Digital Video Broadcast (DVB) television system (Re, M., Cardarilli, G.C., Del Re, A. and Lojacono R. (2000) “FPGA Implementation of a Demux based on a multirate filter bank”. International Symposium on Circuits and Systems 2000, 5 (May), 353–356). At present, a more expensive and complex analog structure, based on six Surface Acoustic Wave (SAW) filters, is used. The new digital architecture has been mapped on six Altera Flex 10K-100 devices. The final test bed, that includes a complete interface to the demodulator, has been implemented on a four-layers PCB.