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Source code

Details

Name: hilbert_transformer
Created: Dec 28, 2008
Updated: Apr 3, 2013
SVN Updated: Apr 5, 2013

Other project properties

Category: DSP core
Language: VHDL
Development status: Stable
Additional info: Design done , FPGA proven
WishBone Compliant: No
License: LGPL

Description

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.

Screenshot of Modelsim-Simulation

If you find something interesting, feel free to contact me: pluto[at]ls68.de