Single-carrier and multi-carrier cooperative diversity techniques for next generation HF communication systems

2005年卡特里娜飓风袭击美国墨西哥湾沿岸时，严重破坏了该地区与世隔绝的电信基础设施。由于几乎所有的高端应急通信设备、911呼叫中心、手机发射塔和固定电话线都被飓风摧毁，高频(高频)业余无线电系统在救援和恢复行动中发挥了关键作用。随后的美国国会听证会强调，业余的无线电回应是救灾工作中为数不多的正确做法之一。这种悲惨的事件使人们重新认识到“古老的”高频技术，自从无线电出现以来，这项技术一直是全世界信息传输的重要组成部分。在这个高科技的信息时代，短波通信继续被广泛地用于民用、政府和军事应用，作为无数更复杂的通信系统的强大替代方案。短波系统传统上与模拟语音和极低速率的数据传输有关。随着语音通信从模拟向数字的转变，以及对高速率数据传输(如电子邮件、互联网、文件传输协议)的需求不断增加，短波通信正在经历复兴。需要创新的技术来推动高频频段的容量限制。我们的研究计划旨在填补这一领域的研究空白，研究能够支持下一代短波通信系统中具有挑战性的期望的合适的空中接口体系结构。

When Hurricane Katrina hit the Gulf Coast of United States in 2005, it severely damaged the telecommunications infrastructure isolating the area from outside world. With nearly all the high-end emergency communications gear, 911 call centers, cellphone towers, and fixed phone lines being knocked out by the hurricane in its path, HF (high-frequency) amateur radio systems played a critical role in rescue and recovery operations. Subsequent American congressional hearings highlighted the amateur radio response as one of the few examples of what went right in the disaster relief effort. Such tragic incidents have resulted in re-appreciation of the "good old" HF technology which has been an essential part of worldwide information transmission since the advent of radio. In this high-tech information age, HF communication continues to be used for a wide range of civilian, government, and military applications as a powerful alternative to a myriad of more sophisticated communication systems. HF systems have been traditionally associated with analog voice and very-low-rate data transmission. With the shift from analog to digital in voice communication and increasing demands for high-rate data transmission (e.g., e-mail, internet, FTP), HF communication has been going through a renaissance. Innovative techniques are required to push the capacity limits of HF band. Our research proposal aims to fill the research gap in this area investigating suitable air interface architectures which will be able to support the challenging expectations in next generation HF communication systems.