John B. Stephensen wrote: > FPGAs are useful for signal processing as you can do many operations in > parallel. FIR filter, FFT and CORDIC modules are available in the free > development software from Xilinx. They are very good for processing > wideband signals or digitizing an entire amateur band and then filtering > the result. Unfortunately, the starter kit has only low-speed > low-resolution ADCs and DACs. > > 73, > > John > KD6OZH
Speed and resolution are, of course, relative :) While those chips are capable of crunching on half the HF spectrum at once, I was thinking initially of just audio (for which the on-board converters would be fine) - kind of a super-TNC, with capabilities (speed/bandwidth) similar to Pactor-III with no patents, open-source software, and significantly lower hardware costs. Sound card modes, of course, have gained popularity due to their flexibility and low cost - but can't handle the tight timing needed for pactor-type modes. It just seemed to me that something like a commercially-available low-cost FPGA board might be able to get the best of both worlds. Yeah, I'm suggesting a minor paradigm shift. Scary. 73, Paul / K9PS
