Cheng JF, McEliece RJ (1996) Some high-rate near capacity codecs for the Gaussian channel. In: Proceedings of 34th Allerton conference on communications, control and computing, Allerton 14.Richardson T, Urbanke R (2001) Efficient encoding of low-density parity-check codes. IEEE Trans Inform ...
Specifically, npc parity-check bits are appended to the information payload. Some of them are assigned to the k+npc unfrozen synthetic channels with lowest polarization weight. This improves the error performance of the code. Some of them are assigned to the unfrozen-bit positions in the ...
Potential gain of low-density parity-check (LDPC) code implementation over two-track disc recording system with one-head and two-head detector is considered. Two-track system with E2PR4 in-track intersymbol interference (ISI) model is used, assuming linear symmetrical intertrack interf...
In this single kernel, one thread maps a kind of information in one codeword, and the same kind of information of all codewords is then stored sequentially. There are three kinds of information, which include: the log-likelihood ratios (LLRs) of variable nodes, the message of check nodes...
This technique also shows a tighter upper bound than any other previous bound techniques for turbo-like code with a particular interleaver and LDPC code with a particular parity check matrix.Kyuhyuk ChungDivision of Information and Computer ScienceJun Heo...
The Tanner graph is described. A girth in the Tanner graph is equivalent to a short cycle of 1- symbols in the parity check matrix. The condition called row-column constraint is introduced, in order to allow practical decoding procedures. They are based on the sum-product algorithm, which ...
1. A method for constructing a low-density parity-check (LDPC) code having a structured parity check matrix, the method comprising the steps of: constructing, in a computer processor, a base parity check matrix H=[Hd|Hp] having a plurality of elements, Hd being a data portion of the bas...
In particular, this invention relates to a decoding system using low density parity check codes. BACKGROUND OF THE INVENTION The use and implementation of computer networks has become very popular. Networks such as Local area networks (LANs), Metropolitan area networks (MANs), Wireless LANs (WLAN...
<div p-id="p-0001">Certain aspects of the present disclosure generally relate to techniques for puncturing of structured low density parity check (LDPC) codes. A method for wireless communications by
correspond to the set of parity-check constraints which define the code. Edges in the graph connect variable nodes to constraint nodes. A variable node and a constraint node are said to be neighbors if they are connected by an edge in the graph. For simplicity, we generally assume that a ...