OFDM for cognitive radio: merits and challenges (original) (raw)

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Overlay Cognitive Radio Based on OFDM with Channel Estimation Issues Cover Page

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Developments in Cognitive Radio Networks Cover Page

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Research Challenges of Cognitive Radio Cover Page

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An Efficient Adaptive Technique with Low Complexity for Reducing PAPR in OFDM-Based Cognitive Radio Cover Page

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Direct Data Detection of OFDM Signals Over Wireless Channels Cover Page

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Study the effect of PAPR on wideband cognitive OFDM radio networks Cover Page

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Optimal and suboptimal adaptive algorithms for rate and power transmission in OFDM-based Cognitive Radio systems Cover Page

An Investigation of the Various Challenges of OFDM-based Cognitive Radio

2017

Orthogonal frequency division multiplexing wideband modulation scheme is used in Cognitive Radio to transfer the data at high rate and eliminate the inter symbol interference. OFDM also provides various advantages in cognitive radio such as ease in spectrum sensing and provides interoperability to other wireless technologies such as Wi-Fi, 4G, Digital Audio Broadcasting. Beside these pros of OFDM in the cognitive radio, there are number of challenges to implement the OFDM at the physical layer of the Cognitive radio systems. These challenges are reduction in high Peak-to-Average Power Ratio, maintaining synchronization with the primary users in cognitive networks and the size of the cyclic prefix(CP) to reduce the inter symbol interference(ISI) etc. In this paper various major challenges of OFDM implementation in the Cognitive Radio networks are discussed and also how these problems can be resolved are described.

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An Investigation of the Various Challenges of OFDM-based Cognitive Radio Cover Page

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Cooperative Sequential Spectrum Sensing Algorithms for OFDM Cover Page

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Cognitive Radio Systems: Multicarrier Modulation and Power Allocation Challenges Cover Page