On 08/04/2011 09:52 PM, Page Jack wrote: > Hi Colby, > I know cheaper in hardware, but now I don't understand how using IIR > filter can compute the RSSI? > > The power estimate in a complex channel is computed as:
AVG(I**2 + Q**2) An IIR filter is a simple way of approximating the AVG part of that equation, and computing the absolute value is another approximation for the I**2 and Q**2 part. You'll notice in the RSSI section that it essentially computes the absolute value. -- Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
