Title :
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
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;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing (WiCOM), 2012 8th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-61284-684-2
DOI :
10.1109/WiCOM.2012.6478714
