System Design for Cognitive Radio Conmunications

2006 1st International Conference on Cognitive Radio Oriented Wireless Networks and Communications Pub Date : 2006-06-08 DOI:10.1109/CROWNCOM.2006.363451

M. E. Sahin, H. Arslan

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引用次数: 43

Abstract

The rising number and capacity requirements of radio systems bring about an increasing demand for frequency spectrum. Cognitive radio offers a tempting solution to this problem by proposing opportunistic usage of frequency bands that are not occupied by their licensed users. Since it is a rather new concept, there is no consensus on the practical implementation of cognitive radio communications. In this paper, a comprehensive system design for cognitive radio is presented. The details of spectrum sensing and dynamic spectrum shaping, which constitute the basics of opportunistic spectrum usage, are given. It is proposed to transmit the spectrum sensing related information via on-off keying (OOK) modulated ultrawideband (UWB). The limits on the range of one-to-one cognitive communications are discussed. A processing gain based approach that leads to an increased range for cognitive networks is proposed. Different signaling options for the real data communications are given, and among these options an impulse radio that employs raised cosine filters is investigated in detail

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认知无线电通信系统设计

随着无线电系统数量和容量的不断增加，对频谱的需求也在不断增加。认知无线电为这个问题提供了一个诱人的解决方案，它提出机会性地使用未被授权用户占用的频段。由于这是一个相当新的概念，对认知无线电通信的实际实施还没有达成共识。本文提出了一种全面的认知无线电系统设计。给出了构成机会频谱利用基础的频谱感知和动态频谱整形的细节。提出了通过开关键控(OOK)调制超宽带(UWB)传输频谱传感相关信息的方法。讨论了一对一认知交流范围的限制。提出了一种基于处理增益的方法来增加认知网络的范围。给出了实际数据通信的不同信号选择，并详细研究了采用提高余弦滤波器的脉冲无线电

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2006 1st International Conference on Cognitive Radio Oriented Wireless Networks and Communications

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