In the next generation wireless communication systems, high-speed packet services will be in great demand, and hence error control technique is indispensable. Hybrid automatic repeat request (HARQ) is a well-known important error control technique. The joint use of frequency-domain equalization (FDE) and inter-chip interference (ICI) cancellation based on the minimum mean square error criterion...

In Multiple Input Multiple Output (MIMO) technology, a cross layer design enhances the spectral efficiency, reliability and throughput of the network. In this paper, a cross-layer approach for k-NN based Adaptive Modulation Coding (AMC) and Incremental Redundancy Hybrid Automatic Repeat Request (IR-HARQ) in MIMO is proposed. The proposed cross layer approach connects physical layer and data lin...

BACKGROUND AND OBJECTIVES Cough is a major symptom in cystic fibrosis. Ivacaftor is a novel drug which targets the G551D mutation and has been demonstrated to improve lung function and weight in the long term. It also improves symptoms of extra-oesophageal reflux. We wanted to evaluate the effect of ivacaftor on cough in cystic fibrosis. METHODS In two patients with cystic fibrosis the Hull A...

Long Term Evolution (LTE) is designed for deployment in a variety of spectrum allocation ranging from 1.4 MHz to 20 MHz. The peak data rate envisaged for LTE is 100 Mbps in downlink and 50 Mbps in the uplink. Unfortunately, different constraints have a strong influence on system performance such as the velocity of user equipment and effect of multipath channel. To achieve data rate compliance w...

Two incremental redundancy hybrid ARQ (IR-HARQ) schemes are proposed, analyzed, and compared: one is based on LDPC code ensembles with random transmission assignments, the other is based on recently introduced Raptor codes. A number of important issues, such as rate and power control, Raptor code design, and error rate performance after each transmission on time varying binary-input, symmetrico...

To improve the robustness and reliability of wireless transmissions, two complementary link adaptation techniques are employed: adaptive modulation and coding (AMC) at the physical layer and hybrid automatic retransmission request (HARQ) at the medium access control layer. Because of their effectiveness in combating errors induced by the wireless channel, AMC and HARQ are now integral component...

In this paper we compare two hybrid automatic repeat request (HARQ) combining strategies that currently are considered for the high speed downlink packet access (HSDPA) evolution of WCDMA. The two HARQ combining schemes are Chase combining, where the retransmissions are identical copies of the original transmission, and incremental redundancy (IR), where the retransmissions consist of new parit...

Dept. of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University 05 Aza-Aoba, Aramaki, Aoba-ku, Sendai, 980-8579 Japan E-mail: †{nakajima, deep}@mobile.ecei.tohoku.ac.jp, ‡[email protected] Abstract Recently, Multi-Input Multi-Output (MIMO) and Orthogonal Frequency Division Multiplexing (OFDM) are gaining much attention for very high speed data communi...