The Interference Constrained Pilot Design for NC-OFDM Systems in Cognitive Radios

Author

Chunhua Zhu ; Shouyi Yang

Author_Institution

Coll. of Inf. Sci. & Eng., Henan Univ. of Technol., Zhengzhou, China

fYear

2012

fDate

21-23 Sept. 2012

Firstpage

1

Lastpage

4

Abstract

The pilot design is one of key issues for non-continuous orthogonal frequency division multiplexing (NC-OFDM) systems in cognitive radios. A new design of the optimal pilot position and power allocation under a interference temperature constraint has been presented in this paper, the presented scheme minimizes the mean-square error(MSE) of the least squares(LS) channel estimate under a primary user(PU) interference temperature limit. Simulation results show that the PU interference temperature constraint can change the optimal pilot positions and power distribution.

Keywords

OFDM modulation; cognitive radio; interference suppression; least mean squares methods; LS channel estimate; MSE; NC-OFDM system; cognitive radio; interference constrained pilot design; interference temperature constraint; least squares channel; mean-square error; noncontinuous orthogonal frequency division multiplexing; optimal pilot position; power allocation; power distribution; primary user interference temperature limit; Channel estimation; Cognitive radio; Educational institutions; Interference; OFDM; Optimization; Temperature distribution;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing (WiCOM), 2012 8th International Conference on

Conference_Location

Shanghai

ISSN

2161-9646

Print_ISBN

978-1-61284-684-2

Type

conf

DOI

10.1109/WiCOM.2012.6478714

Filename

6478714