Proceedings ArticleDOI
Design & Comparison of Lossless Polyphase Decomposition using Filter Bank for Onboard Digital Signal Processing Payload
Krishna K. Wadiwala,Janki S. Padalia,Neerai Mishra,Deepak Mishra +3 more
- pp 2407-2412
TLDR
The M-channel transmultiplexer's for geo communication satellite are design and simulation in this paper and a comparison of the MDFT and DCT approaches are also described.Abstract:
The M-channel transmultiplexer's for geo communication satellite are design and simulation in this paper. The mathematical description has been discussed in detail. Modified Discrete Fourier Transform(MDFT) and andcosined Discrete Transform(DCT) have chosen for advanced communication satellite. MDFT and DCT provide perfect reconstruction. The theory of filter bank satisfying the perfect reconstruction using proto FIR filter of length N= 2*M*m+1; where M = No. of channel. A new set of objective functions has been derived to satisfy the transmultiplexer's requirements based on these approaches. This work is done under the technology development program of ISRO. In this paper a comparison of the MDFT and DCT approaches are also described.read more
Citations
More filters
TDM-FDM Transmultiplexer: Digital Polyphase and FFT
TL;DR: The cascading of a discrete Fourier transform processor and a digital polyphase network is shown to reduce the computation rate in frequency multiplexing-demultiplexing systems to a value close to minimum.
References
More filters
Journal ArticleDOI
Cosine-modulated FIR filter banks satisfying perfect reconstruction
TL;DR: A novel design procedure is presented based on the two-channel lossless lattice that enables the design of a large class of FIR (finite impulse response)-PR filter banks, and includes the N=2M case.
Journal ArticleDOI
TDM-FDM Transmultiplexer: Digital Polyphase and FFT
M. Bellanger,J. Daguet +1 more
TL;DR: The cascading of a discrete Fourier transform processor and a digital polyphase network is shown to reduce the computation rate in frequency multiplexing-demultiplexing systems to a value close to minimum.
Journal ArticleDOI
Modified DFT filter banks with perfect reconstruction
Tanja Karp,Norbert J. Fliege +1 more
TL;DR: In this paper, a modified discrete Fourier transform DFT (MDFT) filter bank is proposed for subband image coding applications, where all analysis and synthesis filters obtained by appropriate complex modulation of a low-pass prototype filter are linear phase.
TDM-FDM Transmultiplexer: Digital Polyphase and FFT
TL;DR: The cascading of a discrete Fourier transform processor and a digital polyphase network is shown to reduce the computation rate in frequency multiplexing-demultiplexing systems to a value close to minimum.
Proceedings ArticleDOI
MDFT filter banks with perfect reconstruction
Tanja Karp,Norbert J. Fliege +1 more
TL;DR: It is shown that the MDFT filter bank structure provides a cancellation of all odd alias spectra and it is demonstrated that even perfect reconstruction can be obtained by an appropriate filter design.