一种基于侦测与规避技术的超宽带和WiMAX共存机制

A Study on UWB/WiMAX Coexistence Based on Detection and Avoidance Mechanism

感知无线电被快速地作为一种新技术应用在未充分利用频谱的机会主义应用的使用中。它主要是在次设备(无牌照设备)中侦测主用户(有牌照用户)的存在,且如其频谱被认定为空则自动使用此频谱。这种形式的频谱感知也同时可以在调整器的作用下,促进不同的服务类型动态共存。首先讨论规避与检测技术的不同方案。然后,显示最后呈现在WiMAX系统中单个超宽带设备运行的测量结果。

Cognitive radios have been advanced as a technology for the opportunistic use of underutilized spectrum wherein secondary devices sense the presence of the primary user and use the spectrum only if it is deemed empty.Spectral cognition of this form can also be used by regulators to facilitate the dynamic coexistence of different service types.An example of this is the operation of ultra-wideband devices in WiMAX bands：UWB devices must detect and avoid WiMAX devices in certain regulatory domains.In this paper start by discussing various options for detection and avoidance,then describe the obstacles faced in achieving robust detection and avoidance with an on-chip implementation of basic DAA functionality.Finally,we present measurement results for operation of a single UWB device with a WiMAX system.