Low-Complexity Soft-Output Decoding of Polar Codes

The state-of-the-art soft-output decoder for polar codes is a message-passing algorithm based on belief propagation, which performs well at the cost of high processing and storage requirements. In this paper, we propose a low-complexity alternative for soft-output decoding of polar codes that offers...

Full description

Saved in:
Bibliographic Details
Published in:IEEE journal on selected areas in communications Vol. 32; no. 5; pp. 958 - 966
Main Authors: Fayyaz, Ubaid U., Barry, John R.
Format: Journal Article
Language:English
Published: New York IEEE 01.05.2014
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Belief propagation
Blocking
Channels
Complexity
Complexity theory
Decoders
Decoding
Iterative decoding
Memory management
Polar codes
Receivers
soft-output decoding
State of the art
turbo equalization
ISSN:0733-8716, 1558-0008
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The state-of-the-art soft-output decoder for polar codes is a message-passing algorithm based on belief propagation, which performs well at the cost of high processing and storage requirements. In this paper, we propose a low-complexity alternative for soft-output decoding of polar codes that offers better performance but with significantly reduced processing and storage requirements. In particular we show that the complexity of the proposed decoder is only 4% of the total complexity of the belief propagation decoder for a rate one-half polar code of dimension 4096 in the dicode channel, while achieving comparable error-rate performance. Furthermore, we show that the proposed decoder requires about 39% of the memory required by the belief propagation decoder for a block length of 32768.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 14
ObjectType-Article-1
ObjectType-Feature-2
content type line 23
ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2014.140515