To-do List of TD Channel Estimation

1. Combine Mi and 1/Mi buffers (done)
2. Handle decimal dot position in overall data path (done)
3. Decimal dot alignment for data combination from S buffer and Alpha filter (done)
4. Noise power calculation in DwPTS mode (done)
5. Control path in Test mode (done)
6. Modify bit-width of Alpha, ThrhldGain, Weight to 12bits (done)
7. Timing closure in 208MHz (done)
8. Performance improvement
9. FFT overflow times for last stage