Sublinear Latency for Simplified Successive Cancellation Decoding of Polar Codes [article]

Marco Mondelli, Seyyed Ali Hashemi, John Cioffi, Andrea Goldsmith
2020 arXiv   pre-print
This work analyzes the latency of the simplified successive cancellation (SSC) decoding scheme for polar codes proposed by Alamdar-Yazdi and Kschischang. It is shown that, unlike conventional successive cancellation decoding, where latency is linear in the block length, the latency of SSC decoding is sublinear. More specifically, the latency of SSC decoding is O(N^1-1/μ), where N is the block length and μ is the scaling exponent of the channel, which captures the speed of convergence of the
more » ... to capacity. Numerical results demonstrate the tightness of the bound and show that most of the latency reduction arises from the parallel decoding of subcodes of rate 0 or 1.
arXiv:1909.04892v2 fatcat:dx2fizupsjggvil7frk6vkglom