Sundance FC108 v.1.1 - Manual (Page 6)

FC108 - Polyphase filterbank v1.1
Fast
Polyphase filterbank product manual
December 2005 www.sundance.com - 6 -
Resources usage and performances
Device Slices Multipliers 18x18
Block RAMs
18Kb
Fmax
Virtex-II Pro
XC2VP40 -7
5,901 36 157 125.0MHz
Virtex-II
XC2V8000
5,230 36 157 106.7 MHz
Table2 : Resources usage and performances
Testbench and Matlab programs
The Filterbank core package comprises a VHDL testbench and two Matlab programs to
generate data and check results.
Filterbank_TB.vhd
: This testbench is designed to work with the Filterbank core. It extracts
the core parameters from the ‘settings.txt’ file and load the filter taps from the ‘filter_taps.txt’
file. The input data are also read from a file (‘data_in.txt’) and continuously sent to the core
once started. Upon the simulation completion, the results are written to the ‘data_out.txt’ file.
Please make sure that the file paths in the testbench VHDL file are pointing to the folder where
the files are being stored.
filterbank_in.m
: This Matlab program generates the parameters, filter taps and data in format
expected by the core (see Data format). The filterbank core data and the filter taps are saved in
an ASCII format respectively in the ‘data_in.txt’ and ‘filter_taps.txt’ files. A third file,
‘settings.txt’, contains the parameters for thefilterbank core simulation.
Please make sure that the file paths in the FFT_test.m Matlab program are pointing to the same
files as the VHDL testbench.
filterbank_out.m
: This Matlab program reads the files generated by the filterbank_in.m
program as well the results of the simulation from the ‘data_out.txt’ file. It then performs the
data processing as per Equation 4 and calculates for each data batch the Signal To Noise Ratio
(SNR) that is written to the ‘SNR.txt’ file.
Please make sure that the file paths in the FFT_test.m Matlab program are pointing to the same
files as the VHDL testbench.