Polar codes for discrete alphabets
Eren Şaşoğlu · 2012
An open problem in polarization theory is whether all memoryless channels and sources with composite (that is, non-prime) alphabet sizes can be polarized with deterministic, Arıkan-like methods. This paper answers the question in the affirmative by giving a method to polarize all discrete memoryless channels and sources. The method yields codes that retain the low encoding and decoding complexity of binary polar codes.