Title :
Doppler diversity for OFDM wireless mobile communications. Part I: frequency domain approach
Author :
Kim, Byung-Chul ; Lu, I-Tai
Author_Institution :
Syst. Archit. Design Lab, Samsung Electron. Co. Ltd., Suwon, South Korea
Abstract :
A novel frequency domain Doppler diversity technique for OFDM systems is proposed. The received OFDM signal is first frequency shifted to generate various diversity branches. After demodulation, branch outputs are individually weighted and added together. For Doppler spread signal, it alters fading statistics and improves the bit error rate. Extensive simulations show that combining three diversity branches with proper frequency shifts reduces BER by an order when the normalized Doppler spread is larger than 0.3.
Keywords :
OFDM modulation; diversity reception; error statistics; mobile radio; signal processing; Doppler diversity technique; Doppler spread signal; OFDM wireless mobile communications; bit error rate; demodulation; diversity branches; fading statistics; frequency domain approach; Bit error rate; Demodulation; Diversity reception; Fading; Frequency diversity; Frequency domain analysis; Mobile communication; OFDM; Signal generators; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1208878
