Hi Mangesh,
To increase throughput, here are some of the things you should consider:
1. Improve C/I ( reduce interference)
2. Reduce no. of users per PDCH
3. Check PCU congestion/Utilization
Which vendor are you using? Also, you said you have 2PDCH per sector, what does that mean? Are these 2PDCHs dedicated? Semi-dedicated?
Regards,
SHELDON