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引用次数: 2
摘要
DAA (Detect and Avoid)机制是一种广泛应用于认知无线电的技术，用于支持在同一频谱部分操作的主、次用户共存。在本文中，我们描述了我们使用Wisair的超宽带(UWB)测试加密狗(作为频谱的可能的辅助用户操作)在3.5 GHz范围内检测WiMAX信号(作为主要用户操作)的经验。为此，搭建了通用辐射试验台，并考虑了两种场景，实验研究了WISAIR超宽带设备内DAA块的检测能力。从接收信号强度和器件灵敏度两方面给出了检测结果。
Detect and avoid mechanism for ultra wide-band WiMedia: Experimental evaluation of detection capabilities
The Detect and Avoid (DAA) mechanism is a widely used technique in cognitive radios to support the coexistence of primary and secondary users operating in the same spectrum portion. In this paper we describe our experience in detecting WiMAX signal (operating as a primary user) in the 3.5 GHz range using the Ultra Wide-Band (UWB) test dongles from Wisair (operating as a possible secondary user of the spectrum). For this purpose a generic radiated test bed was prepared and two scenarios were considered in order to experimentally study the detection capability of DAA block within the WISAIR UWB devices. The detection results are presented in terms of the received signal strength and the sensitivity of the device.
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