In this work it is shown that three pairs of the factors appear to be the key, i.e. main factors of a natural classification of protein amino acids, i.e. canonical amino acids within the amino acid (genetic) code. First pair: the factors of the habit (habitus) of an amino acid molecule (size and polarity). Second pair: the factors of the association (type of the amino acid – enzyme reactivity a...

Polar code is a breakthrough in coding theory. Using list successive cancellation decoding with large list size L, polar codes can achieve excellent error correction performance. The L partial decoded vectors are stored in the path memory and updated according to the results of list management. In the stateof-the-art designs, the memories are implemented with registers and a large crossbar is u...

This work identifies information-theoretic quantities that are closely related to the required list size on average for successive cancellation (SCL) decoding implement maximum-likelihood over general binary memoryless symmetric (BMS) channels. It also provides upper and lower bounds these can be computed efficiently very long codes. For erasure channel (BEC), we provide a simple method estimat...

Spread spectrum communication is a new theory and modulation technique, and different from the conventional communication system. A good correlation property and large linear period of Pseudo-random sequence is the basis of spread spectrum communication systems intern CDMA (code division multiple access communication systems). Out of several techniques to implement direct sequence spread Spectr...

A NON-ASYMPTOTIC APPROACH TO THE ANALYSIS OF COMMUNICATION NETWORKS: FROM ERROR CORRECTING CODES TO NETWORK PROPERTIES MAY 2013 ALI ESLAMI B.Sc., SHARIF UNIVERSITY OF TECHNOLOGY M.Sc., SHARIF UNIVERSITY OF TECHNOLOGY Ph.D., UNIVERSITY OF MASSACHUSETTS AMHERST Directed by: Professor Hossein Pishro-Nik This dissertation has its focus on two different topics: 1. non-asymptotic analysis of polar co...

Polar codes are considered the latest major breakthrough in coding theory. Polar codes were introduced by Arıkan in 2008. In this letter, we show that the binary polar codes are the same as the optimized codes for bitwise multistage decoding (OCBM), which have been discovered before by Stolte in 2002. The equivalence between the techniques used for the constructions and decodings of both codes ...

A method to construct nonasymmetric distributed source coding (DSC) scheme using polar codes which can achieve any point on the dominant face of the Slepian–Wolf (SW) rate region for sources with uniform marginals is considered. In addition to nonasymmetric case, we also discuss and show explicitly how asymmetric and single source compression is done using successive cancellation (SC) polar dec...