I used gnuradio in channel sounding experiments during the summer. I did
not use gr-sounder. Rather, I designed my own transmitter and receiver
block diagrams using GRC.
You can do both sliding correlator and frequency domain channel sounding
using GNUradio. Sliding correlator method directly generates the channel
impulse response. Frequency domain sounding allows you to find the
response through inverse FFT procedure. There might be other methods
am unaware of.
In general, the frequency domain channel sounding method gives you the
channel strengths at different carrier frequencies.Let’s say, your
frequency band is 700-720 MHz region. You can transmit a sinusoid from
transmitter that repeatedly hops at 700, 701, 702, …, 720, 700, 701,
720 MHz. Your receiver’s carrier frequency should hop repeatedly in the
same list. If you can time synchronize your Tx & Rx, you will know the
loss by taking FFT and observing the strength of the floating points in
desired FFT bin.
On Fri, Nov 16, 2012 at 3:30 PM, daviko [email protected] wrote:
Muhammad Nazmul I.
Electrical & Computer Engineering
Wireless Information & Networking Laboratory