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

长期以来，多元素天线阵一直被用来在接收器位置获得输入波场的空间分离样本，然后通过从简单到复杂的各种技术进行组合，以减少多径衰落的有害影响。近年来，移动无线电界一直在研究在发射机和接收机(而不是像以前那样仅在接收机)使用天线阵列的技术，目的是通过利用多径传播的存在来显著提高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。这一拟议项目的目的是对MIMO技术在短波频段内通信的潜在适用性进行基于实验的调查。

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.