Survey on researches of UWB range extension applications
超宽带拓展距离应用的研究综述*

At present, UWB systems are mainly used for short distance applications. In order to extend the application field, some researches have been carried out on the range extension of UWB systems. Accordingly, a survey is made of these researches. The application scenarios of UWB long-distance communications are described, and based on the principle analysis, example demonstration and difficulty exploration, six strategies for the range extension of UWB communications are introduced, which are the reduction of the communication rate, the use of directional antennas, the use of MIMO antennas, the use of cooperative communication or multi-hop transmission, the use of multi-tap RAKE receiver, and the breakthrough of the power spectral density limit. The survey can serve as important reference for the implementation scheme selection of UWB long-distance communications.