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Coexistence Issues in Cognitive Radios Based on Ultra-Wide Bandwidth Systems
White Paper This paper discusses the basic concepts underlying Cognitive Radio (CR) and investigates the Ultra Wide Bandwidth (UWB) technology as one of the enabling transmission techniques for the implementation of CR systems. [11 Jul 2008]
Distributed Load Balancing Algorithm for Adaptive Channel Allocation for Cognitive Radios
White Paper The growing interest in the cognitive radio technology and its capability to offer more efficient spectrum usage brought this problem back as one of the most popular research topics nowadays. This paper presents two quite simple to implement... [10 Jul 2008]
Peter Cochrane's Blog: Wireless jelly
Comment But I suspect that future cognitive radios will almost single-handedly overcome this problem. You know how it is: you're in a coffee shop working online and using the free wi-fi service. There are five bars of signal. [13 Jun 2008]
IEEE 802.22: The First Worldwide Wireless Standard Based on Cognitive Radios
White Paper In November/2004, it witnessed the formation of the first worldwide effort to define a novel wireless air interface1 standard based on Cognitive Radios (CRs): the IEEE 802.22 Working Group (WG). The IEEE 802.22 WG is chartered with the development... [23 Aug 2007]
Cooperation and Cognition in Wireless Networks
White Paper The analysis of networks is made even richer through the recent introduction of cognitive radios, which could allow for cooperation between network nodes. This paper presents a decomposition of arbitrary wireless networks with cognitive and non... [23 Aug 2007]
Towards an Architecture for Efficient Spectrum Slicing
White Paper Most research in this domain is being conducted in design of cognitive radios and on specific PHY and MAC layer challenges associated with them. With the increased demands for wireless spectrum, dynamic spectrum sharing is emerging as an important... [31 May 2007]
An Efficient Implementation of NC-OFDM Transceivers for Cognitive Radios
White Paper This paper presents an efficient implementation of a Non-Contiguous Orthogonal Frequency Division Multiplexing (NC- OFDM) transceiver for cognitive radio systems. NC-OFDM is designed to transmit information in the presence of incumbent users... [11 Apr 2007]
Adaptive-Mode Peak-to-Average Power Ratio Reduction Algorithm for OFDM-Based Cognitive Radio
White Paper This paper presents a novel low complexity algorithm for reducing the Peak-to-Average Power Ratio (PAPR) occurring in OFDM-based cognitive radios. The proposed algorithm exploits the agility of cognitive radio technology to rapidly choose and... [11 Apr 2007]
Wideband Spectrum Probe for Distributed Measurements in Cellular Band
White Paper One of the foremost critical design problems in cognitive radios is the need to process wide bandwidth and reliably detect the presence of primary users. This places significant requirements on sensitivity, dynamic range and linearity of the RF... [07 Dec 2006]
MultiMAC - An Adaptive MAC Framework for Dynamic Radio Networking
White Paper Such radios offer the promise of spectrum agility and re-configurability through flexibility at the MAC and physical layers. Software-defined/cognitive radio has recently made the jump from a purely research driven endeavor to one that is now being... [12 May 2006]
