The Hilbert Transform is an important component in communication systems, e.g. for single sideband modulation/demodulation, amplitude and phase detection, etc. It can be formulated as filtering operation which makes it possible to approximate the Hilbert Transform with a digital filter. Due to the non-causal and infinite impulse response of that filter, it is not that easy to get a good approximation with low hardware resource usage. Therefore, different filters with different complexities have been implemented.
The detailed discussion can be found in "Digital Hilbert Transformers or FPGA-based Phase-Locked Loops" (http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=4629940).
The design is fully pipelined for maximum throughput.
FEATURES
• 16 bit PIPE Spec PCI Express Testbench
• Link training
• Initial Flow Control
• Packet Classes for easy to build PHY,DLLP and TLP packets
• DLLP 16 bit CRC and TLP LCRC generation
• Sequence Number generation and checking
• ACK TLP packets
• Scrambling
• MemRd MemWr CfgRd CfgWr TLPs
H=CIRCLE(CENTER,RADIUS,NOP,STYLE)
This routine draws a circle with center defined as
a vector CENTER, radius as a scaler RADIS. NOP is
the number of points on the circle. As to STYLE,
use it the same way as you use the rountine PLOT.
Since the handle of the object is returned, you
use routine SET to get the best result.
My first project written in Quartus II by using VHDL, executed some tasks that display word on 7-segments LED through the simulated 5-to-1 multiplexer. My code is easy to acquire and may be help usefull.
