Suppression of side lobe power for Cognitive Radios based on OFDM using Windowing Techniques
Jameel Ahamed1, Hemendra Kumar Tiwari2

1Jameel Ahamed, Department of Computer Science and Engineering & IT, Maulana Azad National Urdu University Gachibowli, Hyderabad, (Telangana), India.
2Hemendra Kumar Tiwari, Department of Electronics & Communication, National Institute of Technology, Srinagar (Jammu & Kashmir), India.

Manuscript received on 15 April 2016 | Revised Manuscript received on 25 April 2016 | Manuscript Published on 30 April 2016 | PP: 53-56 | Volume-5 Issue-4, April 2016 | Retrieval Number: D4483045416/16©BEIESP
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Abstract: With the introduction of new technology in wireless applications with high data rate and increase of existing wireless services, need for additional bandwidth is speedily enhancing. Existing spectrum allocation policies of the Federal Communications Commission (FCC) forbids unlicensed access to licensed spectrum, confining them to various heavily populated, interference-prone frequency bands, which causes shortage in spectrum. Orthogonal frequency division multiplexing (OFDM) is used for cognitive radio (CR) transmission because it supports high data rates that are vigorous to channel impairments. The immense problem for transmission of OFDM is high out-of-band (OOB) radiation, which is due to sinc-type function representing the symbols throughout one time constant. Thus, high sidelobe may happen that will intervene with neighboring transmissions. In this paper we used windowing techniques to decrease the effects of sidelobe transmission.
Keywords: OFDM, CR, Windowing

Scope of the Article: Computer Architecture and VLSI