An experimental investigation into the feasibility of MIMO techniques within the HF band

多元件天线阵列长期以来一直被用于接收机站点，以在接收机处获得入射波场的空间分离的样本，然后通过从简单到复杂的各种技术将这些样本组合，以减少多径衰落的有害影响。近年来，移动的无线电界一直在研究在发射机和接收机处（而不是如前所述仅在接收机处）采用天线阵列的技术，目的是通过利用多径传播的存在来显著增加固定带宽内的数据吞吐量容量。这些被称为MIMO（多输入/多输出）系统。这个项目的目的是进行一个实验为基础的调查MIMO技术的潜在适用性在HF波段内的通信。

Multi-element antenna arrays have long been employed at receiver sites to obtain spatially separated samples of the incoming wavefield at a receiver which are then combined by a variety of techniques ranging from the simple to the complex to reduce the deleterious effects of multi-path fading. In recent years, the mobile radio community has been investigating techniques in which arrays of antennas are employed at both the transmitter and receiver (rather than just at the receiver as previously) with the aim of significantly increasing the data throughput capacity within a fixed bandwidth by exploiting the presence of multipath propagation. These are known as MIMO (multiple input / multiple output) systems. The aim of this proposed project is to undertake an experimentally based investigation on the potential applicability of MIMO techniques to communications within the HF band.