Xilinx Solution Summary

An important part of any digital system is the ability to manipulate digital data. Finite Impulse Response filters form an important part many digital systems such as cable modems, high definition television (HDTV), digital cameras, wireless communications, digital telephones, digital special effects, biomedical instrumentation etc. In fact, almost every digital system has some form of a digital filter. Like most Digital Signal Processing (DSP) functions, digital filters are best performed by utilizing a pipelined parallel architecture. The low-cost Spartan-II FPGA provides the ideal architecture to implement high performance digital filters. In fact, implementing FIR filters in the Spartan-II FPGAs provides significantly higher performance than general purpose DSPs.

Spartan-II FIR Filter features include:

• High-performance finite impulse response (FIR), half-band, Hilbert transform and interpolated filters
• Highly parameterizable
• 2-to-256 tap symmetrical impulse response
• 2-to-128 tap non-symmetrical impulse response
• 1-to-32 bit input data precision
• Signed or unsigned input data
• 1-to-32 bit coefficient precision
• 1-to-8 channels
• Coefficient symmetry exploited (symmetric/negative-symmetric) to produce compact implementations
• Data-flow style core interface and control
• High performance and density guaranteed through Relational Placed Macro (RPM) mapping and placement technology