Tapped delay line structure

[saboo]

If I wish to emulate a wireless multi-path channel, is there a way I can bring in the tapped delay line filter structure into my LV code ? I mean, would I be able to get accurate delays, say in the order of ns for my taps ? Also, how do I model the delays ?I've been searching for help on this subject but haven't been able to find much.

[MarcusB]

If you know your filter specifications (lower/upper passband/stopband) then you can use the "Digital FIR Filter" vi to filter your channel. If you know the coefficients of the desired filter, then you can use the "FIR Filter" vi. One way you can create delay is to use the "Continuous Convolution (FIR)" vi to convolve your waveform with a shifted Kronecker delta. You can make this delay in the order of ns if the sampling frequency of the simulated channel is high enough. Have you looked at LabVIEW examples that use filtering? Check out the example "FIR Filtering and Response.vi" in the NI Example Finder.