[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Discuss-gnuradio] Channel Model Block; 'epsilon'
From: |
Uzair Baig |
Subject: |
[Discuss-gnuradio] Channel Model Block; 'epsilon' |
Date: |
Mon, 26 Dec 2011 17:42:19 +0500 |
I am confused about the channel model block:
It needs the following parameters:
Creates a channel model that includes:
- AWGN noise power in terms of noise voltage
- A frequency offest in the channel in ratio
- A timing offset ratio to model clock difference (epsilon)
- Multipath taps
The 'epsilon' in particular is confusing. I have referred, it represents the inverse of the fractional interpolation ration. Now, firstly I need to know,
whether this parameter will cause delay between the Tx and Rx path ? I have tried working my way with the frac_interp_ff block and recognize, that
it doesn't return the same number of samples to me? For a value of 1, the number of samples input are more than the number of samples output!
Doesnt the interpolation mean an increase in the number of samples?
Secondly, I have connected this channel model to polyphase filter banks for clock recovery. I don't get a correct output if I increase epsilon? And
another thing, can you please share as to what does each parameter filter bank imply? ( I have read the documentation, but, cannot make much sense of it).
Regards,
UB
- [Discuss-gnuradio] Channel Model Block; 'epsilon',
Uzair Baig <=