Author
Hosseini, S. S., Abouei, J., Uysal, Murat
Publication Date
2015-05
Publication Place
-
IEEE
Subject
MIMO communication, Adaptive codes, Automatic repeat request, Computational complexity, Decoding, Protocols, Space-time block codes
Type
Periodical
Language
English
Digital
Yes
Manuscript
No
Library
Özyeğin University
Library Asset ID
1536-1276
Record ID
c357b6e3-2222-4b99-95ba-ff2d7dc30953
Library Location
Electrical & Electronics Engineering
Date
2015-05
Notes
Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Sample Text
This paper presents a comprehensive study on the problem of decoding complexity in a Multi-Input Multi-Output (MIMO) Hybrid Automatic Repeat reQuest (HARQ) system based on Space-Time Block Codes (STBCs). We show that there exist two classes of fast-decodable MIMO HARQ systems: independent and dependent STBC structures. For the independent class, two types of protocols namely, fixed and adaptive threshold-based are presented and their effectiveness in both computational complexity reduction and spectral efficiency preservation are discussed. For the dependent class, a fast Sphere Decoder (SD) algorithm with a low computational complexity is proposed for decoding process of HARQ rounds. Two new concepts are introduced to leverage the fast-decodable notion in MIMO HARQ systems. Simulation results show that the proposed fast-decodable MIMO HARQ protocols in both classes provide a significant reduction in the decoding complexity as compared with the original MIMO HARQ method.
DOI
10.1109/TWC.2015.2395411
Cilt
14
