Stochastic Networked Computation

In this paper, the stochastic networked computation (SNC) paradigm for designing robust and energy-efficient systems-on-a-chip in nanoscale process technologies, where robust computation is treated as a statistical estimation problem is presented. The benefits of SNC are demonstrated by employing it to design an energy-efficient and robust pseudonoise-code acquisition system for the wireless CDMA2000 standard (http://www.3gpp2.org). Simulations in IBM´s 130-nm CMOS process show that the SNC-based architecture enhances the average probability of detection (P_Det) in the presence of process variations by two to three orders of magnitude, reduces power by 31%-39%, and reduces the variation in P_Det by one to two orders of magnitude at a typical false-alarm rate of 5% over a conventional architecture. SNC performance in the presence of voltage overscaling and across technology nodes (90, 65, 45, and 32 nm) is also studied.