Proceedings ArticleDOI
Discontiguous OFDM considerations for dynamic spectrum access in idle TV channels
J.D. Poston,W.D. Horne +1 more
- pp 607-610
TLDR
In this article, the idle bandwidth in the current TV band assignments is quantified and a modified form of OFDM called Discontiguous OFDM (DOFDM) is proposed.Abstract:
Sharing spectrum with systems that employ frequency reuse over large geographical areas (e.g., TV stations) provides an opportunity to improve spectrum utilization. The Federal Communications Commission (FCC) is considering such sharing in the TV hands (2004). This technical and regulatory opportunity prompted the IEEE to create a new committee, 802.22, that will develop a wireless regional area network (WRAN) standard for operating on vacant TV channels. This paper quantifies the idle bandwidth in the current TV band assignments; although the TV station information incorporated here is specific to the United States, the methodology and findings should be relevant to a global audience. The methodology for this analysis is distinct from prior literature on spectrum use measurements and offers a complementary perspective. Furthermore, the statistics from the analysis point to the value of systems that can operate on discontiguous portions of the radio spectrum. One approach, a modified form of OFDM here termed Discontiguous OFDM (DOFDM), could be well-suited to this dynamic spectrum access application. This paper provides a preliminary description of a DOFDM prototype and describes special considerations for its implementationread more
Citations
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Journal ArticleDOI
Advances in cognitive radio networks: A survey
Beibei Wang,K.J.R. Liu +1 more
TL;DR: Recent advances in research related to cognitive radios are surveyed, including the fundamentals of cognitive radio technology, architecture of a cognitive radio network and its applications, and important issues in dynamic spectrum allocation and sharing are investigated in detail.
Journal ArticleDOI
OFDM and Its Wireless Applications: A Survey
TL;DR: This paper addresses basic OFDM and related modulations, as well as techniques to improve the performance of OFDM for wireless communications, including channel estimation and signal detection, time- and frequency-offset estimation and correction, peak-to-average power ratio reduction, and multiple-input-multiple-output (MIMO) techniques.
Journal ArticleDOI
HC-MAC: A Hardware-Constrained Cognitive MAC for Efficient Spectrum Management
TL;DR: A hardware-constrained cognitive MAC, HC-MAC, is proposed to conduct efficient spectrum sensing and spectrum access decision in ad hoc cognitive radio networks while taking the hardware constraints into consideration.
Journal ArticleDOI
Signal Processing in Cognitive Radio
TL;DR: The fundamental signal-processing aspects involved in developing a fully functional cognitive radio network, including spectrum sensing and spectrum sculpting are described.
Patent
Single channel full duplex wireless communications
TL;DR: In this paper, the first analog radio frequency signal including a signal of interest and an interference signal caused by a second analog signal transmitted in full duplex over a channel from which the first analogue transmission is received is provided.
References
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T. Weiss,Friedrich K. Jondral +1 more
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Proceedings ArticleDOI
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