Title :
Improved Frequency Domain Differential Demodulation for Fast Fading HF Channels
Author :
Li Ke ; Hou Chunping ; Fu Jinlin ; Liu Chungui ; Lei Jianjun
Author_Institution :
Sch. of Electron. & Inf. Eng., Tianjin Univ., Tianjin, China
Abstract :
The bit error rate (BER) of MDPSK-OFDM in frequency domain over fading HF channels is evaluated, and the optimum value of subcarrier number is given and the upper and lower bound of BER is obtained. The convention differential demodulation scheme is sensitive to the value of subcarrier number in time-variant multipath channel. Improved frequency domain differential demodulation (FDDD) scheme for fast fading HF channel is proposed. In addition, the simulation results show that our proposed scheme is superior to the conventional differential demodulation technique at fast fading HF channel.
Keywords :
OFDM modulation; demodulation; differential phase shift keying; error statistics; fading channels; frequency-domain analysis; multipath channels; MDPSK-OFDM; bit error rate; fast fading HF channels; improved frequency domain differential demodulation; time-variant multipath channel; Bit error rate; Delay; Demodulation; Fading; Frequency domain analysis; Frequency estimation; Hafnium; OFDM; Performance analysis; System performance;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5301087
