DocumentCode :
3487420
Title :
Joint Channel Estimation and Side Information Scheme for Adaptively Selected OFDM Signals
Author :
Wang, Lei ; Yang, Hui ; Yoon, Dongweon ; Park, Sang Kyu ; Cho, Soobum
fYear :
2007
fDate :
21-25 Sept. 2007
Firstpage :
275
Lastpage :
278
Abstract :
Orthogonal frequency division multiplexing (OFDM) is a special form of multi-carrier modulation which is robust against the multipath effect and inter symbol interference (ISI). However, it is very sensitive to nonlinear effects due to the high peak-to- average power ratio (PAPR) owned by the transmitted signals. To reduce PAPR and improve the error performances of the OFDM signals over fading channels, an OFDM system in which adaptive symbol selection scheme (ASSS) and channel estimation are combined together can be used. The data rate is reduced somewhat in the conventional transmission method because the side information is transmitted with the data information. In order to increase data rate, we propose a new technique to transmit the side information separately in the pilot tones. We demonstrate that the proposed technique can give reasonable bit error rate (BER) performance over fading channels while effectively reducing the PAPR.
Keywords :
OFDM modulation; channel estimation; error statistics; fading channels; intersymbol interference; OFDM signals; adaptive symbol selection scheme; bit error rate; data information; fading channels; intersymbol interference; joint channel estimation; multicarrier modulation; orthogonal frequency division multiplexing; peak-to-average power ratio; side information scheme; Bit error rate; Channel estimation; Distortion; Fading; Frequency division multiplexing; Intersymbol interference; OFDM modulation; Peak to average power ratio; Robustness; Signal generators;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-1311-9
Type :
conf
DOI :
10.1109/WICOM.2007.75
Filename :
4339850
Link To Document :
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