27-02-2013, 09:36 AM
OPTIMIZATION OF DSP SYSTEM BASED ON RESIDUE NUMBER SYSTEM
OPTIMIZATION OF DSP SYSTEM.pptx (Size: 333.09 KB / Downloads: 36)
OBJECTIVE
DSP system based Residue Number System (RNS) is carried.
Implementing Voltage Over Scaling technique (VOS) to residue number system - achieve high energy efficiency but soft errors are caused.
To mitigate the soft errors VOS - Joint Residue Number System (RNS)-Residue Precision Redundancy (RPR) method.
To achieve higher power reduction, low complexity, VOS JRR method.
TECHNIQUE USED
VOS Joint RNS-RPR (JRR) can achieve higher power reduction than RNS for VOS applications.
ADVANTAGE
Using information from RNS & RPR, can achieve a high recovering probability of the soft errors with low hardware complexity.
VOS
The supply voltage - scaled below the Critical Supply Voltage (CSV) for additional power saving -Voltage Over Scaling (VOS).
VOS technology in combination with the DSP based RNS system is applicable - achieving high energy efficiency.
Supply voltage is proportional to power, scaling the supply voltage – energy is saved.
RNS
Performs the parallel carry-free arithmetic algorithm.
Shorter critical path and lower hardware complexity.
VOS based RNS system can achieve higher energy efficiency.
JRR METHOD
JRR based RNS system – Joint information from RPR & RNS to correct the soft errors.
JRR - recover the soft errors in the longest critical path channel.
To analyze performance of JRR, SNR- defined.
SNR of JRR depends on the power value- residual noise power.