NDLI: Partial automatic repeat request transceiver for bandwidth and power efficient multiple-input–multiple-output orthogonal frequency division multiplexing systems

Content Provider	IET Digital Library
Author	Ahmed, Awais Muhammad, Zia Mahmood, Hasan Saqib, Nazar Abbas
Abstract	In this study, the authors present a novel method to improve the performance of automatic repeat request (ARQ) protocol for multiple-input–multiple-output systems that use orthogonal frequency division multiplexing signalling by incorporating partial ARQ (PARQ) mechanism. As a typical ARQ frame has few number of errors, it is useful to retransmit partial sequence of symbols and recover from errors by consuming relatively low bandwidth. The observations from the first transmission and subsequent retransmission are used for joint detection. As a direct consequence of partial retransmission, the bandwidth and power efficiency of the overall system is improved considerably without substantial decrease in the performance. They achieve further bandwidth saving by omitting pilot sequence from the partial retransmission and acquire channel estimate in semi-blind fashion. Partial retransmission of the original information symbol sequence allows the authors to formulate second-order statistics based joint blind channel estimation problem by combining observations from two transmissions. Channel estimation ambiguity inherent to blind methods is resolved by combining cost functions of blind detection and least-square estimator. To evaluate efficacy of the proposed PARQ method, they compare throughput of chase-type hybrid-ARQ and the proposed PARQ methods.
Starting Page	476
Ending Page	486
Page Count	11
ISSN	17518628
Volume Number	9
e-ISSN	17518636
Issue Number	Issue 4, Mar (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/9/4
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2014.0159
Journal	IET Communications
Publisher Date	2014-12-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	ARQ Protocol Automatic Repeat Request Bandwidth Efficiency Improvement Bandwidth Saving Channel Estimation Chase-type Hybrid-ARQ Communication Channel Equalisation And Identification Electrical/electronic Equipment Energy Utilisation Higher Order Statistics Information Symbol Sequence Partial Retransmission Interpolation And Function Approximation Joint Blind Channel Estimation Problem Joint Detection Least Squares Approximation Least-square Estimator MIMO Communication MIMO-OFDM System Modulation And Coding Method Multiple-input Multiple-output System Numerical Analysis Numerical Approximation And Analysis OFDM Modulation Orthogonal Frequency Division Multiplexing Signalling PARQ Mechanism Partial Automatic Repeat Request Transceiver Power Efficiency Improvement Probability Theory Protocol Radio Link And Equipment Radio Transceivers Second-order Statistics Semiblind Fashion Signalling Protocol Statistics Stochastic Linearised SCUC Telecommunication Power Management Wireless Channel
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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