Results 211 to 220 of about 1,852,147 (258)

Practical relay networks: a generalization of hybrid-ARQ

IEEE Journal on Selected Areas in Communications, 2005
Matthew C Valenti
exaly   +2 more sources

Cooperative broadcast channels with hybrid ARQ

2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications, 2011
The throughput performance is studied for a two-user wireless broadcast channel with hybrid automatic repeat request (HARQ) and user cooperation. Two transmission schemes are considered: superposition coding (SC) and frequency-division multiplexing (FDM). During the initial HARQ rounds, the access point (AP) transmits messages to the users using either
openaire   +1 more source

Sequential decoding with ARQ and code combining: a robust hybrid FEC/ARQ system

IEEE Transactions on Communications, 1988
Sequential decoding with ARQ (automatic-repeat-request) and code combining under the timeout condition is considered. That is, whenever the decoding time of a given packet exceeds some predetermined duration, decoding is stopped and retransmission of the packet is requested.
Samir Kallel, David Haccoun
openaire   +1 more source

On the combining schemes for MIMO systems with hybrid ARQ

IEEE Transactions on Wireless Communications, 2009
Multiple-input multiple-output (MIMO) systems with hybrid automatic-repeat-request (HARQ) promises high throughput with high reliability. However, combining-scheme design for such systems faces challenges, the presence of interference and the existence of multiple signal-to-interference-and-noise power ratios (SINRs). To overcome these challenges, this
Edward W. Jang, Jungwon Lee, Hui-Ling Lou, John M. Cioffi   +3 more
openaire   +1 more source

A Hybrid ARQ Protocol for the Communication System with Multiple Channels

Information and Communication Technology Convergence, 2018
In this paper, we propose a new hybrid ARQ error control scheme for the data communication system with multiple parallel channels. The receiver is supposed to have some fixed size of buffers (called resequecing buffer) which are used to temporarily store
Qian Li, Chun-Xiang Chen
semanticscholar   +1 more source

Energy Optimization for Incremental Redundancy Hybrid-ARQ

2019 53rd Asilomar Conference on Signals, Systems, and Computers, 2019
We consider energy optimization for incremental redundancy (IR) hybrid automatic repeat request (HARQ) over independent block-fading channels. We optimize the code rates in different transmission rounds to minimize the overall energy consumption of HARQ, subject to an overall packet error rate constraint.
Bentao Zhang, Pamela C. Cosman, Larry B. Milstein   +2 more
openaire   +1 more source

Coding Performance of Hybrid ARQ Schemes

IEEE Transactions on Communications, 2006
We develop a unified performance metric and detailed analysis for hybrid automatic repeat request (HARQ) schemes based on incremental redundancy (IR) and Chase combining (CC). The general result is applicable to both symbol-based and bit-interleaved coded modulations, to HARQ processes based on rateless and fixed-rate mother codes, and IR schemes with ...
openaire   +1 more source

A new adaptive hybrid ARQ scheme

IEEE Transactions on Communications, 1995
A new hybrid ARQ scheme using product codes is proposed. With a proper column code, the proposed scheme can offer a higher system throughpu than the type-II hybrid ARQ scheme does in a wide range of channel conditions.
openaire   +1 more source

Adaptive Hybrid ARQ Systems With BCJR Decoding

IEEE Transactions on Vehicular Technology, 2008
We propose and evaluate a novel method of constructing Hybrid Automatic Repeat reQuest (HARQ) systems using the specific properties of the Bahl, Cocke, Jelinek, and Raviv (BCJR) error-correcting algorithm. Because the convergence to the actual codeword is not always guaranteed with the BCJR approach, we propose a system in which two different types of ...
Bartosz Mielczarek, Witold A. Krzymien
openaire   +1 more source

Collaborative Hybrid ARQ for CDMA-based Reliable Underwater Acoustic Communications

2018 Fourth Underwater Communications and Networking Conference (UComms), 2018
Achieving high throughput and reliability in underwater acoustic networks is a challenging task due to the bandwidth-limited and unpredictable nature of the channel.
M. Rahmati, D. Pompili, R. Petroccia
semanticscholar   +1 more source