Adaptive Channel Coding Scheme for Next Generation HF-IP Wide Area Network (WAN)

目前，对高频通信技术的需求不断增长，以提供数字服务，特别是在国防通信领域，未来的核心网络将包括各种交付技术，包括高频，以确保可靠的广域网。新技术和智能频率管理的可用性正在导致重新评估和利用这部分频谱的独特优势。未来高频系统的成功依赖于在多个基于IP（互联网协议）的网络中集成的能力，即SATCOM、LAN（局域网）、WAN（广域网）承载者，并且能够支持IP网络的多样性。HFIP网络可以很容易地与其他网络（如SATCOM、V/UHF、陆地线路等）集成在一起，通过使用现成的商用现货（COTS） HF系统，组成一个单一的WAN，以支持延迟和更高速率不是最重要的IP流量。这些类型的HFIP-WAN网络还将为人道主义行动和救灾行动提供宝贵的、具有成本效益的支助，使外地用户能够与主要网络连接。高频天波信道的性质对发展高数据速率可靠通信提出了重大挑战，但是由于使用电离层作为免费中继器而不是使用昂贵的卫星服务，对追求高频通信有更大的经济需求。对开发HFIP无线广域网（HFIP-WAN）也有相当大的兴趣，这为开发改进的错误控制编码和HFIP-WAN架构的调制支持开辟了新的潜力。本文提出的研究将通过改进高频系统使用的现有错误控制编码和调制方案来保持高频频段的竞争力，以适应新的HFIP-WAN网络。本研究还建议研究由HFIP广域网内编码支持的自形成、自修复概念。

Currently there is a growing demand for HF communication technology to provide digital services, especially in the area of defence communications where the future core networks will comprise a variety of delivery techniques, including HF, to ensure a reliable WAN. The availability of new technologies and intelligent frequency management is now leading to a re-evaluation and exploitation of the unique advantages in this part of the spectrum. The success of future HF systems rely on the ability to integrate within a multiple IP (Internet Protocol) based networks i.e. SATCOM, LAN (Local Area Network), WAN (Wide Area Network) bearers and also able to support IP network diversity.An HFIP network can easily be integrated along with other networks such as SATCOM, V/UHF, land lines ,etc, to comprise a single WAN to support IP traffic where the latency and higher rates are not paramount, through using readily available commercial off the shelf (COTS) HF systems. These types of HFIP-WAN networks will also provide invaluable, cost effective support in humanitarian operations and disaster relief operations allowing field users to link with major networks.The nature of the HF sky-wave channel imposes a major challenge in developing high data rate reliable communicationsbut there is a greater economic demand for pursing HF communications due to usage of the ionosphere as a free repeater rather than the use of expensive satellite services.There is also a considerable interest in developing HFIP wireless WAN networks (HFIP-WAN)) and this opens up new potential in developing improved error control coding and modulation support for the HFIP-WAN architecture.The research proposed here will maintain the competitiveness of the HF band by improving the existing error control coding and modulation schemes used by HF systems to suite the new HFIP-WAN networks. This research also proposes investigating a self-forming, self-healing concept supported by coding within an HFIP WAN.