liu.seSearch for publications in DiVA
Change search
ReferencesLink to record
Permanent link

Direct link
VHDL Implementation of Flexible Frequency-Band Reallocation (FFBR) Network
Linköping University, Department of Electrical Engineering.
2011 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

In digital communication systems, satellites give us world wide services. These satellites should effectively use the available bounded frequency spectrum and, therefore, to carry out flexible frequency-band reallocation (FFBR), on-board signal processing implementation on FFBR network is needed. In the future, to design desired dynamic communication systems, very flexible digital signal processing structures will be needed. The hardware, in the system, shall not be changed as simple changes in the software will be made.

The purpose of this thesis is to implement an N-channel FFBR network, where N=20. A 20-channel FFBR network consists of different blocks, e.g., DFT, IDFT, complex multipliers, input/output commutators and polyphase components.

The whole 20-channel FFBR network will be implemented in VHDL. In a 20-channel FFBR network, it is a 20-point FFT/IFFT required. This 20-point FFT/IFFT is built by a combination of radix-4 and radix-5 butterflies. The Cooley-Tukey FFT algorithm is chosen to build the 20-point FFT/IFFT. The main aim is to build 20-point FFT/IFFT. There are 20 complex multipliers before the IFFT block and 20 complex multipliers after the IFFT block. In the same way, 20 complex multipliers are used before the FFT block and 20 complex multipliers are used after the FFT block. At the input/output to this FFBR network, 20 FIR filters (polyphase components) are used, respectively. 

Place, publisher, year, edition, pages
2011. , 60 p.
Keyword [en]
20-channel FFBR network, 20-point FFT/ IFFT, complex multiplier, polyphase components, radix-2, radix-5
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-69390ISRN: LiTH-ISY-EX--11/4466--SEOAI: diva2:426686
2011-05-25, Nollstället, Linköping University, 13:00 (English)
Available from: 2011-08-08 Created: 2011-06-24 Last updated: 2011-08-08Bibliographically approved

Open Access in DiVA

fulltext(1192 kB)337 downloads
File information
File name FULLTEXT01.pdfFile size 1192 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Department of Electrical Engineering
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 337 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 229 hits
ReferencesLink to record
Permanent link

Direct link