Jun 212009

If data rate is high, then UE need to transmit data with high Tx power.
If data rate is low, then UE can transmit data with low Tx power.
Why Tx power is proportional to data rate?
There is a quality requirement Eb/No to retain.
Eb/N0 = (W/Rb)* SIR
where Rb is data rate.
If Rb is increased, then SIR also [...]
Jun 172009
For high data rate, simply send fast.
Which one is high data rate ? 2 bits for 1 second vs. 2 bits for 6 seconds.
So, if you want a high data rate, your sending rate should be fast.
Time and frequency relationship is reverse. Short time duration means wide bandwidth.
That’s why wide bandwidth is need for faster [...]

