A Novel Stochastic Polar Architecture for All-Digital Transmission

A novel architecture of an all-digital transmitter is proposed in this paper, introducing stochastic computation to a single-bit polar topology. The proposed architecture exploits the benefits of stochastic computing to simplify the design of an all-digital transmitter and minimize hardware complexity. Complexity reduction is achieved by implementing a digital oscillator as a cosine function in the stochastic domain instead of resorting to LUT-based or CORDIC-based implementations. An evaluation of the introduced all-digital polar architecture shows that the power spectral density of the transmitted passband signal is similar to that of a conventional transmitter. Synthesis of the proposed stochastic-enabled transmitter at a 28-nm FDSOI technology node reveals its minimal complexity requirements and 87.13% area reduction compared to conventional implementations.