Voice Over IP

ANOTHER EXAMPLE OF DSP CODE

The previous example is a bit difficult to read and takes some thought for a programmer to use. Let us take a look at another example which may be a bit easier to analyze. The code shown in Figure 3-9 is from an analog device's ASP-21xx DSP and I guide you to [STEV98] ^[6] if you need more information on these operations.

^[6] [STEV98] Stevens, Jeff. "DSPs in Communications,"IEEE Spectrum, September 1998.

Figure 3-9. FIR filter routine [STEV98]

The example shown deals with the FIT operation introduced earlier. One of the most important functions in communication DSPs is signal filtering. This concept is simple in that ...