DiComLab
  Digital Communications Laboratory
 Home  |  People  |  Research  |  IP-cores  |  HW demonstrators  |  Lab resources  |  Contact 


FPGA-based Vectorial Spectrum Analizer

This Spectrum Analyzer is implemented in the Virtex II Xilinx device available in the XtremeDSP kit. The analyzer is based on the Fast Fourier Transform computation. A 1024-point FFT is used. It can analyze signals up to 30 MHz (limited by the ADC sample frequency, 65 MHz) with a resolution of 10 kHz and its dynamic range is 74 dB. A spectral zoom by a factor of 2 or 4, together with four windows (rectangular, Hamming, Blackmann-Harris and Flattop) are selectable and the spectrum can be visualized in linear or logarithmic scale (dBs). The subsystem to computes the modulus and phase is preformed by a vectoring mode CORDIC with circular coordinates, and the subsystem to computes the &ldqou;log(x)” function is implemented with a vectoring mode CORDIC with hyperbolic coordinates.

Block diagram of the Spectrum Analizer

Prototype

FPGA resources

FPGA resources No.
Slices
15543
Multipliers (MULT18x18)
940

Block RAM (BRAM)

37

 

 Home  |  People  |  Research  |  IP-cores  |  HW demonstrators  |  Lab resources  |  Contact 

©2012, Digital Communications Laboratory.