A variable rate LDPC coded V-BLAST system

Noh, Minseok; Kim, N.; Park, Hyuncheol; Lee, Hyuckjae

doi:10.1109/vetecf.2004.1400514

Cited by 2 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For very high data rate transmission, LDPC codes are preferred over Turbo codes due to its reduced decoding complexity and computational time. Variable rate LDPC codes can further increase the channel capacity and provide good coding gain [188], [189]. Various analysis has been carried out for the use of LDPC codes in MIMO FSO system [190], [191].…”

Section: Table VI Comparison Of Variants Of Ppm Modulation Schemementioning

confidence: 99%

Optical Communication in Space: Challenges and Mitigation Techniques

Kaushal

Kaddoum

2017

IEEE Commun. Surv. Tutorials

1,274

721

View full text Add to dashboard Cite

Abstract-In recent years, free space optical (FSO) communication has gained significant importance owing to its unique features: large bandwidth, license free spectrum, high data rate, easy and quick deployability, less power and low mass requirements. FSO communication uses optical carrier in the near infrared (IR) band to establish either terrestrial links within the Earth's atmosphere or inter-satellite/deep space links or ground-to-satellite/satellite-to-ground links. It also finds its applications in remote sensing, radio astronomy, military, disaster recovery, last mile access, backhaul for wireless cellular networks and many more. However, despite of great potential of FSO communication, its performance is limited by the adverse effects (viz., absorption, scattering and turbulence) of the atmospheric channel. Out of these three effects, the atmospheric turbulence is a major challenge that may lead to serious degradation in the bit error rate (BER) performance of the system and make the communication link infeasible. This paper presents a comprehensive survey on various challenges faced by FSO communication system for ground-to-satellite/satellite-to-ground and inter-satellite links. It also provide details of various performance mitigation techniques in order to have high link availability and reliability. The first part of the paper will focus on various types of impairments that pose a serious challenge to the performance of optical communication system for ground-to-satellite/satellite-to-ground and inter-satellite links. The latter part of the paper will provide the reader with an exhaustive review of various techniques both at physical layer as well as at the other layers (link, network or transport layer) to combat the adverse effects of the atmosphere. It also uniquely presents a recently developed technique using orbital angular momentum for utilizing the high capacity advantage of optical carrier in case of space-based and near-Earth optical communication links. This survey provides the reader with comprehensive details on the use of space-based optical backhaul links in order to provide high capacity and low cost backhaul solutions.

show abstract