An OFDM throughput analysis for cognitive radio application in contiguous or noncontiguous TV white spaces

Authors

CEBRAİL ÇİFLİKLİ
AHMET TURGUT TUNCER
YUSUF ÖZTÜRK

DOI

10.3906/elk-1302-45

Abstract

Radio frequency spectrum is a finite and scarce resource. Efficient use of the radio frequency spectrum is a fundamental research issue. Since a large portion of the assigned radio frequency spectrum is used only sporadically, the bands currently allocated to TV services can be opportunistically reassigned to support broadband networking services while continuing to provide broadcast TV. The fragmented and unused TV channels named white spaces have a considerable amount of bandwidth potential and long transmission ranges. Bandwidth scalability can be supported by bonding multiple contiguous or noncontiguous consecutive channels using orthogonal frequency division multiplexing (OFDM)-based cognitive radio. In this paper, an in-depth throughput analysis of OFDM fixed carrier spacing and fixed carrier number approaches has been done for various modulation schemes in TV white spaces. Signal propagation delay is studied under various channel conditions. An analytical model-based estimation of the throughput by taking into account channel bonding is presented.

Keywords

TV white space, channel bonding, fixed subcarrier spacing, fixed subcarrier number, 802.11af

First Page

885

Last Page

899

Recommended Citation

ÇİFLİKLİ, CEBRAİL; TUNCER, AHMET TURGUT; and ÖZTÜRK, YUSUF (2015) "An OFDM throughput analysis for cognitive radio application in contiguous or noncontiguous TV white spaces," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 23: No. 3, Article 19. https://doi.org/10.3906/elk-1302-45
Available at: https://journals.tubitak.gov.tr/elektrik/vol23/iss3/19