Title :
Pilot power optimization for channel estimation in OFDM system
Author :
Ohno, Shuichi ; Hosokawa, Shinji ; Teo, Kok Ann Donny
Author_Institution :
Dept. of Artificial Complex Sys. Eng., Hiroshima Univ., Higashi-Hiroshima
Abstract :
For orthogonal frequency division multiplexing (OFDM) system, training preamble for channel estimation is studied when null subcarriers are embedded in each OFDM symbol. The optimal training preamble that minimize the mean squared channel estimation error is numerically found by casting the design problem into a semidefinite programming problem. A design example under the same setting as IEEE802.11a is provided to verify the efficacy of our proposal as well as to show that the preamble of IEEE802.11a is almost optimal.
Keywords :
OFDM modulation; channel estimation; mean square error methods; wireless LAN; IEEE802.11; OFDM system; mean squared channel estimation error; optimal training preamble; orthogonal frequency division multiplexing system; pilot power optimization; semidefinite programming problem; wireless local area networks; Casting; Channel estimation; Digital video broadcasting; Intersymbol interference; Laboratories; Multipath channels; OFDM; Proposals; Transmitters; Wireless LAN;
Conference_Titel :
Communications, 2008. APCC 2008. 14th Asia-Pacific Conference on
Conference_Location :
Tokyo
Print_ISBN :
978-4-88552-232-1
Electronic_ISBN :
978-4-88552-231-4
